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Ueda S, Yoshida Y, Kebede B, Kitamura C, Sasaki R, Shinohara M, Fukuda I, Shirai Y. New Implications of Metabolites and Free Fatty Acids in Quality Control of Crossbred Wagyu Beef during Wet Aging Cold Storage. Metabolites 2024; 14:95. [PMID: 38392987 PMCID: PMC10890485 DOI: 10.3390/metabo14020095] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2023] [Revised: 12/30/2023] [Accepted: 01/11/2024] [Indexed: 02/25/2024] Open
Abstract
Efficient cold-chain delivery is essential for maintaining a sustainable global food supply. This study used metabolomic analysis to examine meat quality changes during the "wet aging" of crossbred Wagyu beef during cold storage. The longissimus thoracic (Loin) and adductor muscles (Round) of hybrid Wagyu beef, a cross between the Japanese Black and Holstein-Friesian breeds, were packaged in vacuum film and refrigerated for up to 40 days. Sensory evaluation indicated an increase in the umami and kokumi taste owing to wet aging. Comprehensive analysis using gas chromatography-mass spectrometry identified metabolite changes during wet aging. In the Loin, 94 metabolites increased, and 24 decreased; in the Round, 91 increased and 18 decreased. Metabolites contributing to the umami taste of the meat showed different profiles during wet aging. Glutamic acid increased in a cold storage-dependent manner, whereas creatinine and inosinic acid degraded rapidly even during cold storage. In terms of lipids, wet aging led to an increase in free fatty acids. In particular, linoleic acid, a polyunsaturated fatty acid, increased significantly among the free fatty acids. These results provide new insight into the effects of wet aging on Wagyu-type beef, emphasizing the role of free amino acids, organic acids, and free fatty acids generated during cold storage.
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Affiliation(s)
- Shuji Ueda
- Department of Agrobioscience, Graduate School of Agricultural Science, Kobe University, Hyogo 657-8501, Japan
| | - Yuka Yoshida
- Japan Meat Science and Technology Institute, Tokyo 150-0013, Japan
| | - Biniam Kebede
- Department of Food Science, University of Otago, P.O. Box 56, Dunedin 9054, New Zealand
| | - Chiaki Kitamura
- Department of Agrobioscience, Graduate School of Agricultural Science, Kobe University, Hyogo 657-8501, Japan
| | - Ryo Sasaki
- Food Oil and Fat Research Laboratory, Miyoshi Oil & Fat Co., Ltd., Tokyo 124-8510, Japan
| | - Masakazu Shinohara
- The Integrated Center for Mass Spectrometry, Kobe University Graduate School of Medicine, Hyogo 650-0017, Japan
| | - Itsuko Fukuda
- Department of Agrobioscience, Graduate School of Agricultural Science, Kobe University, Hyogo 657-8501, Japan
| | - Yasuhito Shirai
- Department of Agrobioscience, Graduate School of Agricultural Science, Kobe University, Hyogo 657-8501, Japan
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Green S, Fanning E, Sim J, Eyres GT, Frew R, Kebede B. The Potential of NIR Spectroscopy and Chemometrics to Discriminate Roast Degrees and Predict Volatiles in Coffee. Molecules 2024; 29:318. [PMID: 38257231 PMCID: PMC10820711 DOI: 10.3390/molecules29020318] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2023] [Revised: 12/27/2023] [Accepted: 01/03/2024] [Indexed: 01/24/2024] Open
Abstract
This study aimed to establish a rapid and practical method for monitoring and predicting volatile compounds during coffee roasting using near-infrared (NIR) spectroscopy coupled with chemometrics. Washed Arabica coffee beans from Ethiopia and Congo were roasted to industry-validated light, medium, and dark degrees. Concurrent analysis of the samples was performed using gas chromatography-mass spectrometry (GC-MS) and NIR spectroscopy, generating datasets for partial least squares (PLS) regression analysis. The results showed that NIR spectroscopy successfully differentiated the differently roasted samples, similar to the discrimination achieved by GC-MS. This finding highlights the potential of NIR spectroscopy as a rapid tool for monitoring and standardizing the degree of coffee roasting in the industry. A PLS regression model was developed using Ethiopian samples to explore the feasibility of NIR spectroscopy to indirectly measure the volatiles that are important in classifying the roast degree. For PLSR, the data underwent autoscaling as a preprocessing step, and the optimal number of latent variables (LVs) was determined through cross-validation, utilizing the root mean squared error (RMSE). The model was further validated using Congo samples and successfully predicted (with R2 values > 0.75 and low error) over 20 volatile compounds, including furans, ketones, phenols, and pyridines. Overall, this study demonstrates the potential of NIR spectroscopy as a practical and rapid method to complement current techniques for monitoring and predicting volatile compounds during the coffee roasting process.
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Affiliation(s)
- Stella Green
- Department of Food Science, University of Otago, Dunedin 9054, New Zealand; (S.G.); (E.F.); (J.S.); (G.T.E.)
| | - Emily Fanning
- Department of Food Science, University of Otago, Dunedin 9054, New Zealand; (S.G.); (E.F.); (J.S.); (G.T.E.)
| | - Joy Sim
- Department of Food Science, University of Otago, Dunedin 9054, New Zealand; (S.G.); (E.F.); (J.S.); (G.T.E.)
| | - Graham T. Eyres
- Department of Food Science, University of Otago, Dunedin 9054, New Zealand; (S.G.); (E.F.); (J.S.); (G.T.E.)
| | - Russell Frew
- Oritain Global Limited, 167 High Street, Dunedin 9016, New Zealand;
| | - Biniam Kebede
- Department of Food Science, University of Otago, Dunedin 9054, New Zealand; (S.G.); (E.F.); (J.S.); (G.T.E.)
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Sim J, Dixit Y, Mcgoverin C, Oey I, Frew R, Reis MM, Kebede B. Support vector regression for prediction of stable isotopes and trace elements using hyperspectral imaging on coffee for origin verification. Food Res Int 2023; 174:113518. [PMID: 37986508 DOI: 10.1016/j.foodres.2023.113518] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2023] [Revised: 09/24/2023] [Accepted: 09/26/2023] [Indexed: 11/22/2023]
Abstract
The potential of using rapid and non-destructive near-infrared - hyperspectral imaging (HSI-NIR) for the prediction of an integrated stable isotope and multi-element dataset was explored for the first time with the help of support vector regression. Speciality green coffee beans sourced from three continents, eight countries, and 22 regions were analysed using a push-broom HSI-NIR (700-1700 nm), together with five isotope ratios (δ13C, δ15N, δ18O, δ2H, and δ34S) and 41 trace elements. Support vector regression with the radial basis function kernel was conducted using X as the HSI-NIR data and Y as the geochemistry markers. Model performance was evaluated using root mean squared error, coefficient of determination, and mean absolute error. Three isotope ratios (δ18O, δ2H, and δ34S) and eight elements (Zn, Mn, Ni, Mo, Cs, Co, Cd, and La) had an R2predicted 0.70 - 0.99 across all origin scales (continent, country, region). All five isotope ratios were well predicted at the country and regional levels. The wavelength regions contributing the most towards each prediction model were highlighted, including a discussion of the correlations across all geochemical parameters. This study demonstrates the feasibility of using HSI-NIR as a rapid and non-destructive method to estimate traditional geochemistry parameters, some of which are origin-discriminating variables related to altitude, temperature, and rainfall differences across origins.
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Affiliation(s)
- Joy Sim
- Department of Food Science, University of Otago, PO BOX 56, Dunedin 9054, New Zealand.
| | - Yash Dixit
- AgResearch, Grasslands Research Centre, Palmerston North, New Zealand
| | - Cushla Mcgoverin
- Department of Physics, University of Auckland, Auckland 1010, New Zealand; The Dodd-Walls Centre for Photonic and Quantum Technologies, Auckland 1010, New Zealand
| | - Indrawati Oey
- Department of Food Science, University of Otago, PO BOX 56, Dunedin 9054, New Zealand; Riddet Institute, Palmerston North, New Zealand
| | | | - Marlon M Reis
- AgResearch, Grasslands Research Centre, Palmerston North, New Zealand
| | - Biniam Kebede
- Department of Food Science, University of Otago, PO BOX 56, Dunedin 9054, New Zealand.
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Goughenour A, Kebede B, MacLennan G, Castro J, Stephenson L, Majithia L, Hetelekidis S, Parniani A, Fan J, Wang P, Chawla AK, Rao AD. Dosimetric and Clinical Results of a Volumetric-Based Skin-Sparing Planning Technique for Patients Treated to the Breast and Chest Wall with Pencil Beam Scanning Proton Therapy. Int J Radiat Oncol Biol Phys 2023; 117:S89-S90. [PMID: 37784598 DOI: 10.1016/j.ijrobp.2023.06.416] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/04/2023]
Abstract
PURPOSE/OBJECTIVE(S) Given clinical concerns for more brisk acute skin toxicity with proton compared with photon RT due to differences in the energy deposition properties, our institution implemented a novel volumetric skin-sparing planning technique (SSPT) for intensity modulated proton therapy (IMPT) for patients treated to the breast or chest wall (CW). This study evaluates SSPT dosimetry and the hypothesis that a SSPT will reduce acute dermatitis during IMPT to the breast and CW. MATERIALS/METHODS Prior to the development of a consensus technique, skin dose evaluation in IMPT plans was limited to mitigation of skin hot spots and cropping off the skin surface by 3mm for CW and 5mm for intact breast targets (except indications for deliberate skin dosing). In January 2022 our center added volumetric-based skin sparing objectives in addition to hot-spot evaluation as a SSPT. A skin evaluation structure (skin-eval) was defined as a skin rind of 3 mm for CW and 5 mm for intact breast within 5mm of the CTV, bound by the patient's surface. The SSPT incorporated an objective to limit the volume of skin-eval receiving 95% of the prescription dose or more (V95%Rx) to ideally <50% (goal<60%) while still prioritizing CTV coverage and robustness. We compared target coverage, robustness, and skin-eval dosimetry as well as acute on-treatment skin toxicity in patients treated with and without incorporation of this SSPT. Patients with skin/dermal lymphatic invasion or inflammatory breast cancer were excluded. RESULTS 84 patients who were planned to receive breast or CW IMPT were included (43 planned without and 41 with the SSPT). There was no difference in percentages of patients treated to the intact breast/CW/immediate CW reconstruction between the groups (37%/23%/40% without and 34%/27%/39% with SSPT, p>0.05). Mean skin-evalV95%Rx was 72% vs. 30%, p<0.0001, for those treated without vs. with a SSPT. Maximum %Rx to the skin volume of 0.03 cc, 0.3cc, and 1cc, was higher in patients treated without compared to those with a SSPT (103.1% vs. 101.5%; 101.3% vs. 100.4%; and 101.8% vs. 99.7% (all p=<0.0001)), respectively. There was a small statistical difference in the mean CTV V97.5%Rx in patients treated without vs. with the SSPT (97.8% vs. 96.5%, p=0.0003). Patients planned utilizing the SSPT demonstrated reduced rates of Grade 1 breast pain at Week 2 (12% vs. 33%, p=0.0424) and Grade 2 and 3 dermatitis at Week 5 (grade 2 38% vs. 42%; grade 3, 0% vs. 11%, p=0.0016). There were numerically more patients requiring a treatment break or not completing full intended prescription (4 vs. 1) in the pre-SSPT cohort. CONCLUSION A volumetric-based SSPT appears to reduce the frequency of brisk onset dermatitis and near-end of RT significant dermatitis while still maintaining acceptable target coverage and robustness in patients receiving IMPT to the breast and CW.
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Affiliation(s)
| | - B Kebede
- Inova Schar Cancer Institute, Fairfax, VA
| | | | - J Castro
- Inova Schar Cancer Institute, Fairfax, VA
| | | | - L Majithia
- Inova Schar Cancer Institute, Fairfax, VA; Radiation Oncology Associates of the National Capital Region, Fairfax, VA
| | - S Hetelekidis
- Inova Schar Cancer Institute, Fairfax, VA; Radiation Oncology Associates of the National Capital Region, Fairfax, VA
| | - A Parniani
- Inova Schar Cancer Institute, Fairfax, VA
| | - J Fan
- Inova Schar Cancer Institute, Fairfax, VA
| | - P Wang
- Inova Schar Cancer Institute, Fairfax, VA
| | - A K Chawla
- Inova Schar Cancer Institute, Fairfax, VA; Radiation Oncology Associates of the National Capital Region, Fairfax, VA
| | - A D Rao
- Inova Schar Cancer Institute, Fairfax, VA; Radiation Oncology Associates of the National Capital Region, Fairfax, VA
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Sim J, Mcgoverin C, Oey I, Frew R, Kebede B. Stable isotope and trace element analyses with non-linear machine-learning data analysis improved coffee origin classification and marker selection. J Sci Food Agric 2023; 103:4704-4718. [PMID: 36924039 DOI: 10.1002/jsfa.12546] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2022] [Revised: 03/03/2023] [Accepted: 03/16/2023] [Indexed: 06/06/2023]
Abstract
BACKGROUND This study investigated the geographical origin classification of green coffee beans from continental to country and regional levels. An innovative approach combined stable isotope and trace element analyses with non-linear machine learning data analysis to improve coffee origin classification and marker selection. Specialty green coffee beans sourced from three continents, eight countries, and 22 regions were analyzed by measuring five isotope ratios (δ13 C, δ15 N, δ18 O, δ2 H, and δ34 S) and 41 trace elements. Partial least squares discriminant analysis (PLS-DA) was applied to the integrated dataset for origin classification. RESULTS Origins were predicted well at the country level and showed promise at the regional level, with discriminating marker selection at all levels. However, PLS-DA predicted origin poorly at the continental and Central American regional levels. Non-linear machine learning techniques improved predictions and enabled the identification of a higher number of origin markers, and those that were identified were more relevant. The best predictive accuracy was found using ensemble decision trees, random forest and extreme gradient boost, with accuracies of up to 0.94 and 0.89 for continental and Central American regional models, respectively. CONCLUSION The potential for advanced machine learning models to improve origin classification and the identification of relevant origin markers was demonstrated. The decision-tree-based models were superior with their embedded variable identification features and visual interpretation. © 2023 The Authors. Journal of The Science of Food and Agriculture published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry.
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Affiliation(s)
- Joy Sim
- Department of Food Science, University of Otago, Dunedin, New Zealand
| | - Cushla Mcgoverin
- Department of Physics, University of Auckland, Auckland, New Zealand
- The Dodd-Walls Centre for Photonic and Quantum Technologies, Dunedin, New Zealand
| | - Indrawati Oey
- Department of Food Science, University of Otago, Dunedin, New Zealand
- The Riddet Institute, Palmerston North, New Zealand
| | | | - Biniam Kebede
- Department of Food Science, University of Otago, Dunedin, New Zealand
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6
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Sim J, McGoverin C, Oey I, Frew R, Kebede B. Near-infrared reflectance spectroscopy accurately predicted isotope and elemental compositions for origin traceability of coffee. Food Chem 2023; 427:136695. [PMID: 37385064 DOI: 10.1016/j.foodchem.2023.136695] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2022] [Revised: 06/12/2023] [Accepted: 06/19/2023] [Indexed: 07/01/2023]
Abstract
Stable isotope ratios and trace elements are well-established tools that act as signatures of the product's environmental conditions and agricultural processes; but they involve time, money, and environmentally destructive chemicals. In this study, we tested for the first time the potential of near-infrared reflectance spectroscopy (NIR) to estimate/predict isotope and elemental compositions for the origin verification of coffee. Green coffee samples from two continents, 4 countries, and 10 regions were analysed for five isotope ratios (δ13C, δ15N, δ18O, δ2H, and δ34S) and 41 trace elements. NIR (1100-2400 nm) calibrations were developed using pre-processing with extended multiplicative scatter correction (EMSC) and mean centering and partial-least squares regression (PLS-R). Five elements (Mn, Mo, Rb, B, La) and three isotope ratios (δ13C, δ18O, δ2H) were moderately to well predicted by NIR (R2: 0.69 to 0.93). NIR indirectly measured these parameters by association with organic compounds in coffee. These parameters were related to altitude, temperature and rainfall differences across countries and regions and were previously found to be origin discriminators for coffee.
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Affiliation(s)
- Joy Sim
- Department of Food Science, University of Otago, PO BOX 56, Dunedin 9054, New Zealand.
| | - Cushla McGoverin
- Department of Physics, University of Auckland, Auckland 1010, New Zealand; The Dodd-Walls Centre for Photonic and Quantum Technologies, Auckland 1010, New Zealand
| | - Indrawati Oey
- Department of Food Science, University of Otago, PO BOX 56, Dunedin 9054, New Zealand; Riddet Institute, Palmerston North, New Zealand
| | | | - Biniam Kebede
- Department of Food Science, University of Otago, PO BOX 56, Dunedin 9054, New Zealand.
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Soni K, Frew R, Kebede B. A review of conventional and rapid analytical techniques coupled with multivariate analysis for origin traceability of soybean. Crit Rev Food Sci Nutr 2023:1-20. [PMID: 36734977 DOI: 10.1080/10408398.2023.2171961] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Soybean has developed a reputation as a superfood due to its nutrient profile, health benefits, and versatility. Since 1960, its demand has increased dramatically, going from a mere 17 MMT to almost 358 MMT in the production year 2021/22. These extremely high production rates have led to lower-than-expected product quality, adulteration, illegal trade, deforestation, and other concerns. This necessitates the development of an effective technology to confirm soybean's provenance. This is the first review that investigates current analytical techniques coupled with multivariate analysis for origin traceability of soybeans. The fundamentals of several analytical techniques are presented, assessed, compared, and discussed in terms of their operating specifics, advantages, and shortcomings. Additionally, significance of multivariate analysis in analyzing complex data has also been discussed.
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Affiliation(s)
- Khushboo Soni
- Department of Food Science, University of Otago, Dunedin, New Zealand
| | - Russell Frew
- Oritain Global Limited, Central Dunedin 9016, Dunedin, New Zealand
| | - Biniam Kebede
- Department of Food Science, University of Otago, Dunedin, New Zealand
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Li X, Oey I, Ying Leong S, Kebede B. Understanding the volatile flavour changes during accelerated shelf-life testing of oats using chemometrics and kinetic modelling. Food Chem 2022; 405:134864. [DOI: 10.1016/j.foodchem.2022.134864] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2022] [Revised: 10/15/2022] [Accepted: 11/02/2022] [Indexed: 11/08/2022]
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Wang Z, Megha S, Kebede B, Kav NNV, Rahman H. Genetic and molecular analysis reveals that two major loci and their interaction confer clubroot resistance in canola introgressed from rutabaga. Plant Genome 2022; 15:e20241. [PMID: 35818693 DOI: 10.1002/tpg2.20241] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2022] [Accepted: 05/26/2022] [Indexed: 06/15/2023]
Abstract
Clubroot disease caused by Plasmodiophora brassicae is one of the serious threats to canola (Brassica napus L. subsp. napus) production. The evolution of new pathotypes rendering available resistances ineffective compel the introgression of new resistance into canola and extend our understanding of the genetic and molecular basis of the resistance. In this paper, we report the genetic and molecular basis of clubroot resistance in canola, introgressed from a rutabaga (B. napus L. subsp. rapifera Metzg. 'Polycross'), by using a doubled-haploid (DH) mapping population. Whole-genome resequencing (WGRS)-based bulked segregant analysis followed by genetic mapping and expression analysis of the genes in resistant and susceptible DH lines at 7 and 14 d after inoculation were carried out. Following this approach, two major quantitative trait loci (QTL) located at 14.41-15.44 Mb of A03 and at 9.96-11.09 Mb of A08 chromosomes and their interaction was observed to confer resistance to pathotypes 3H, 3A, and 3D. Analysis of the genes from the two QTL regions suggested that decreased expression of sugar transporter genes (BnaA03g29290D and BnaA03g29310D) may play an important role in resistance conferred by the A03 QTL, while increased expression of the toll/interleukin-1 receptor (TIR)-nucleotide binding (NB)-leucine rich repeat (LRR) (TNL) genes (BnaA08g10100D, BnaA08g09220D, and BnaA08g10540D) could be the major determinant of the resistance conferred by the A08 QTL. Single-nucleotide polymorphism (SNP) allele-specific polymerase chain reaction (PCR)-based markers, which could be detected by agarose gel electrophoresis, were also developed from the two QTL regions for use in breeding including pyramiding of multiple clubroot resistance genes.
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Affiliation(s)
- Z Wang
- Dep. of Agricultural, Food and Nutritional Science, Univ. of Alberta, Edmonton, AB, T6G 2P5, Canada
| | - S Megha
- Dep. of Agricultural, Food and Nutritional Science, Univ. of Alberta, Edmonton, AB, T6G 2P5, Canada
| | - B Kebede
- Dep. of Agricultural, Food and Nutritional Science, Univ. of Alberta, Edmonton, AB, T6G 2P5, Canada
| | - N N V Kav
- Dep. of Agricultural, Food and Nutritional Science, Univ. of Alberta, Edmonton, AB, T6G 2P5, Canada
| | - H Rahman
- Dep. of Agricultural, Food and Nutritional Science, Univ. of Alberta, Edmonton, AB, T6G 2P5, Canada
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Kavle RR, Carne A, Bekhit AEA, Kebede B, Agyei D. Macronutrients and mineral composition of wild harvested
Prionoplus reticularis
edible insect at various development stages: nutritional and mineral safety implications. Int J Food Sci Technol 2022. [DOI: 10.1111/ijfs.15545] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ruchita Rao Kavle
- Department of Food Science University of Otago Dunedin 9054 New Zealand
| | - Alan Carne
- Department of Biochemistry University of Otago Dunedin 9054 New Zealand
| | | | - Biniam Kebede
- Department of Food Science University of Otago Dunedin 9054 New Zealand
| | - Dominic Agyei
- Department of Food Science University of Otago Dunedin 9054 New Zealand
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Khrisanapant P, Leong SY, Kebede B, Oey I. Effects of Hydrothermal Processing Duration on the Texture, Starch and Protein In Vitro Digestibility of Cowpeas, Chickpeas and Kidney Beans. Foods 2021; 10:1415. [PMID: 34207291 PMCID: PMC8234845 DOI: 10.3390/foods10061415] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2021] [Revised: 06/13/2021] [Accepted: 06/14/2021] [Indexed: 11/18/2022] Open
Abstract
Legumes are a vital candidate in the fight for food security as a sustainable and nutritious food source. The current study systematically investigated the effects of hydrothermal processing of varying durations (15-120 min) on the texture, starch and protein digestibility of cowpeas (Vigna unguiculata), chickpeas (Cicer arietinum) and kidney beans (Phaseolus vulgaris). Texture analysis and in vitro oral-gastro-intestinal digestion of each legume was combined with kinetic modelling to explore the rate and extent of their changes observed during hydrothermal processing. All three legumes showed rapid initial texture decay in the first 30 min of processing. Chickpeas showed the fastest rate of texture degradation with processing duration, whereas texture degradation of kidney bean was slower but reached the lowest hardness value among all beans when processed up to 120 min. The rate of starch and protein digestion increased with prolonged processing duration, whilst showing an inverse relationship with texture values. The extent of starch digestion continually increased with processing duration for all three legumes, whereas the extent of protein digestion decreased after 60 min in cowpeas. This study systematically demonstrated how choosing different processing times can modulate the rate of texture degradation, starch and protein digestion in legumes. The findings of this study can aid consumers and manufacturers on optimal processing to achieve the desired texture or modulate starch and protein digestibility.
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Affiliation(s)
- Prit Khrisanapant
- Department of Food Science, Division of Sciences, University of Otago, P.O. Box 56, Dunedin 9054, New Zealand; (P.K.); (S.Y.L.); (B.K.)
- Riddet Institute, Private Bag 11 222, Palmerston North 4442, New Zealand
| | - Sze Ying Leong
- Department of Food Science, Division of Sciences, University of Otago, P.O. Box 56, Dunedin 9054, New Zealand; (P.K.); (S.Y.L.); (B.K.)
- Riddet Institute, Private Bag 11 222, Palmerston North 4442, New Zealand
| | - Biniam Kebede
- Department of Food Science, Division of Sciences, University of Otago, P.O. Box 56, Dunedin 9054, New Zealand; (P.K.); (S.Y.L.); (B.K.)
| | - Indrawati Oey
- Department of Food Science, Division of Sciences, University of Otago, P.O. Box 56, Dunedin 9054, New Zealand; (P.K.); (S.Y.L.); (B.K.)
- Riddet Institute, Private Bag 11 222, Palmerston North 4442, New Zealand
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Magpusao J, Giteru S, Oey I, Kebede B. Effect of high pressure homogenization on microstructural and rheological properties of A. platensis, Isochrysis, Nannochloropsis and Tetraselmis species. ALGAL RES 2021. [DOI: 10.1016/j.algal.2021.102327] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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13
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Arcena MR, Leong SY, Then S, Hochberg M, Sack M, Mueller G, Sigler J, Kebede B, Silcock P, Oey I. The effect of pulsed electric fields pre-treatment on the volatile and phenolic profiles of Merlot grape musts at different winemaking stages and the sensory characteristics of the finished wines. INNOV FOOD SCI EMERG 2021. [DOI: 10.1016/j.ifset.2021.102698] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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14
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Zhu D, Hayman A, Frew R, Kebede B, Chen G, Stewart I. Milk Powder Extraction: Optimization of Conditions for the Water-Soluble Metabolites by Proton Nuclear Magnetic Resonance (1H-NMR). ANAL LETT 2021. [DOI: 10.1080/00032719.2021.1907588] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Dan Zhu
- Department of Chemistry, University of Otago, Dunedin, New Zealand
| | - Alan Hayman
- Department of Chemistry, University of Otago, Dunedin, New Zealand
| | - Russell Frew
- Department of Chemistry, University of Otago, Dunedin, New Zealand
| | - Biniam Kebede
- Department of Food Science, University of Otago, Dunedin, New Zealand
| | - Gang Chen
- Key Laboratory of Agro-Product Quality and Safety, Institute of Quality Standards and Testing Technology for Agro-Products, Chinese Academy of Agricultural Sciences (CAAS), Beijing, China
| | - Ian Stewart
- Department of Chemistry, University of Otago, Dunedin, New Zealand
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15
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Zhu D, Kebede B, McComb K, Hayman A, Chen G, Frew R. Milk biomarkers in relation to inherent and external factors based on metabolomics. Trends Food Sci Technol 2021. [DOI: 10.1016/j.tifs.2020.12.012] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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16
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High R, Eyres GT, Bremer P, Kebede B. Characterization of blue cheese volatiles using fingerprinting, self-organizing maps, and entropy-based feature selection. Food Chem 2020; 347:128955. [PMID: 33486360 DOI: 10.1016/j.foodchem.2020.128955] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2020] [Revised: 12/18/2020] [Accepted: 12/23/2020] [Indexed: 10/22/2022]
Abstract
Understanding which volatile compounds discriminate between products can be useful for quality, innovation or product authenticity purposes. As dataset size and dimensionality increase, linear chemometric techniques like partial least squares discriminant analysis and variable identification (PLS-DA-VID) may not identify the most discriminant compounds. This research compared the performance of self-organizing maps and entropy-based feature selection (SOM-EFS) and PLS-DA-VID to identify discriminant compounds in 17 blue cheese varieties. A total of 172 volatiles were detected using headspace solid phase microextraction, gas chromatography and mass spectrometry, including 1-nonene and 2,6-dimethylpyridine, which were newly identified in blue cheese. Despite SOM-EFS selecting only 14 volatiles compared to 78 for PLS-DA-VID, SOM-EFS proved more effectively discriminant and improved the median five-fold cross-validated prediction accuracy of the model to 0.94 compared to 0.82 for PLS-DA-VID. These findings introduce SOM-EFS as a powerful non-linear exploratory data analysis approach in the field of volatile analytical chemistry.
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Affiliation(s)
- Ryan High
- Department of Food Science, University of Otago, PO Box 56, Dunedin 9054, New Zealand.
| | - Graham T Eyres
- Department of Food Science, University of Otago, PO Box 56, Dunedin 9054, New Zealand
| | - Phil Bremer
- Department of Food Science, University of Otago, PO Box 56, Dunedin 9054, New Zealand
| | - Biniam Kebede
- Department of Food Science, University of Otago, PO Box 56, Dunedin 9054, New Zealand.
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17
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Zhu D, Kebede B, Chen G, McComb K, Frew R. Changes in milk metabolome during the lactation of dairy cows based on 1H NMR and UHPLC–QToF/MS. Int Dairy J 2020. [DOI: 10.1016/j.idairyj.2020.104836] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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18
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Sanchez LJ, Zhu D, Frew R, Kebede B. Optimization of nuclear magnetic resonance and gas chromatography-mass spectrometry-based fingerprinting methods to characterize goat milk powder. J Dairy Sci 2020; 104:102-111. [PMID: 33189291 DOI: 10.3168/jds.2020-18467] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2020] [Accepted: 08/25/2020] [Indexed: 11/19/2022]
Abstract
This study is the first to provide a comprehensive characterization of the liquid and volatile fractions of whole goat milk powder (GMP). Robust nuclear magnetic resonance (NMR)- and gas chromatography-mass spectrometry (GC-MS)-based chemical fingerprinting methods were optimized and implemented. The untargeted 1H-NMR analysis resolved 44 metabolites in the liquid fractions of GMP. The NMR fingerprinting technique effectively identified metabolites coming from the aliphatic, sugar, and aromatic regions that can be important in defining the technological properties and quality of the GMP. The untargeted headspace gas chromatography-mass spectrometry fingerprinting was able to detect a total of 50 volatiles including alkanes, ketones, alcohols, aromatics, alkenes, aldehydes, esters, acid, and sulfur compounds. The GMP was dominated by volatiles in the alkane group, while only a few esters were detected. Goat milk is a premium product and vulnerable to fraudulent activities such as adulteration or counterfeit. Therefore, proper characterization and identification is a crucial first step to verify its authenticity and quality.
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Affiliation(s)
| | - Dan Zhu
- Department of Chemistry, University of Otago, Dunedin 9016, New Zealand
| | - Russell Frew
- Department of Chemistry, University of Otago, Dunedin 9016, New Zealand
| | - Biniam Kebede
- Department of Food Science, University of Otago, Dunedin 9016, New Zealand.
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19
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Tan D, Zhang X, Su M, Jia M, Zhu D, Kebede B, Wu H, Chen G. Establishing an untargeted-to-MRM liquid chromatography-mass spectrometry method for discriminating reconstituted milk from ultra-high temperature milk. Food Chem 2020; 337:127946. [PMID: 32927223 DOI: 10.1016/j.foodchem.2020.127946] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2020] [Revised: 08/15/2020] [Accepted: 08/24/2020] [Indexed: 01/20/2023]
Abstract
The counterfeit use of reconstituted milk to simulate fresh milk in some countries is largely driven by profiteering; hence, establishing a robust market-surveillance method is an important objective. In this study, an untargeted metabolomics approach that uses ultra-performance liquid chromatography quadrupole time-of-flight mass spectrometry (UPLC-Q-TOF-MS) was established to discover biomarkers that can be used to classify UHT and reconstituted milk. Furthermore, 36 positive- and 24 negative-ionization mode features were selected as candidate markers to establish a UPLC-tandem mass spectrometry (UPLC-MS/MS) multiple reaction monitoring (MRM) method. The support vector machine (SVM) method was used to process the responses of the selected potential markers, and 100% classifiability was observed. The marker metabolites could be divided into three categories by hierarchical clustering analysis: peptides, lipids, and nucleic acids. The results suggest that the untargeted-to-MRM metabolomics method is an effective tool for distinguishing between UHT and reconstituted milk.
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Affiliation(s)
- Dongfei Tan
- Key Laboratory of Agro-Product Quality and Safety, Institute of Quality Standards and Testing Technology for Agro-Products, Chinese Academy of Agricultural Sciences (CAAS), Beijing 100081, China
| | - Xia Zhang
- Key Laboratory of Agro-Product Quality and Safety, Institute of Quality Standards and Testing Technology for Agro-Products, Chinese Academy of Agricultural Sciences (CAAS), Beijing 100081, China
| | - Meicheng Su
- Key Laboratory of Agro-Product Quality and Safety, Institute of Quality Standards and Testing Technology for Agro-Products, Chinese Academy of Agricultural Sciences (CAAS), Beijing 100081, China
| | - Man Jia
- Key Laboratory of Agro-Product Quality and Safety, Institute of Quality Standards and Testing Technology for Agro-Products, Chinese Academy of Agricultural Sciences (CAAS), Beijing 100081, China
| | - Dan Zhu
- Key Laboratory of Agro-Product Quality and Safety, Institute of Quality Standards and Testing Technology for Agro-Products, Chinese Academy of Agricultural Sciences (CAAS), Beijing 100081, China; Department of Food Science, University of Otago, Dunedin 9016, New Zealand
| | - Biniam Kebede
- Department of Food Science, University of Otago, Dunedin 9016, New Zealand.
| | - Huaxing Wu
- New Hope Dairy Company Limited, Product Research and Development Center, Chengdu 610023, China; Dairy Nutrition and Function, Key Laboratory of Sichuan Province, Chengdu 610023, China.
| | - Gang Chen
- Key Laboratory of Agro-Product Quality and Safety, Institute of Quality Standards and Testing Technology for Agro-Products, Chinese Academy of Agricultural Sciences (CAAS), Beijing 100081, China.
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20
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Pham HTT, Bista A, Kebede B, Buvé C, Hendrickx M, Van Loey A. Insight into non-enzymatic browning of shelf-stable orange juice during storage: A fractionation and kinetic approach. J Sci Food Agric 2020; 100:3765-3775. [PMID: 32270878 DOI: 10.1002/jsfa.10418] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/28/2019] [Revised: 03/24/2020] [Accepted: 04/09/2020] [Indexed: 06/11/2023]
Abstract
BACKGROUND Non-enzymatic browning (NEB) is the main quality defect in shelf-stable orange juice and other fruit juices during storage. Previous studies on NEB focused solely on the soluble fraction of orange juice, regardless of the fact that both soluble and insoluble fractions turn brown during extended storage. Clear evidence of the relative contribution of both fractions to NEB is currently lacking in the literature. This study investigated the contribution of the soluble and insoluble fractions of orange juice, which were obtained by centrifugation and ethanol precipitation, to NEB during storage. Changes in different NEB-related attributes, such as ascorbic acid (AA) degradation, and the browning index (BI), were quantified and kinetically modeled. RESULTS Evaluation of color during storage showed that the orange juice and the soluble compound-containing fractions turned brown whereas the insoluble fractions did not. The soluble compound-containing fractions showed exactly the same browning behavior with storage as the plain orange juice. Based on the kinetic parameters obtained, the degradation of AA, the hydrolysis of sucrose, the increase in the glucose and fructose content, and the formation of furfural and 5-hydroxymethylfurfural during storage were similar for the plain orange juice and the soluble compound-containing fractions. CONCLUSION This work provided evidence that the soluble fraction of orange juice plays the major role in NEB, unlike the insoluble fraction, which seems to make no contribution. Results from this work also demonstrate the potential use of the soluble fraction as an orange-juice-based model system of reduced complexity that can be used for the further investigation of NEB processes. © 2020 Society of Chemical Industry.
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Affiliation(s)
- Huong Tran Thuy Pham
- Department of Microbial and Molecular Systems (M2S), Laboratory of Food Technology, KU Leuven, Heverlee, Belgium
| | - Archana Bista
- Department of Microbial and Molecular Systems (M2S), Laboratory of Food Technology, KU Leuven, Heverlee, Belgium
| | - Biniam Kebede
- Department of Microbial and Molecular Systems (M2S), Laboratory of Food Technology, KU Leuven, Heverlee, Belgium
| | - Carolien Buvé
- Department of Microbial and Molecular Systems (M2S), Laboratory of Food Technology, KU Leuven, Heverlee, Belgium
| | - Marc Hendrickx
- Department of Microbial and Molecular Systems (M2S), Laboratory of Food Technology, KU Leuven, Heverlee, Belgium
| | - Ann Van Loey
- Department of Microbial and Molecular Systems (M2S), Laboratory of Food Technology, KU Leuven, Heverlee, Belgium
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21
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Amini Khoozani A, Kebede B, El-Din Ahmed Bekhit A. Rheological, textural and structural changes in dough and bread partially substituted with whole green banana flour. Lebensm Wiss Technol 2020. [DOI: 10.1016/j.lwt.2020.109252] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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22
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Amini Khoozani A, Kebede B, Birch J, Bekhit AEDA. The Effect of Bread Fortification with Whole Green Banana Flour on Its Physicochemical, Nutritional and In Vitro Digestibility. Foods 2020; 9:E152. [PMID: 32033343 PMCID: PMC7073709 DOI: 10.3390/foods9020152] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2020] [Revised: 01/31/2020] [Accepted: 02/02/2020] [Indexed: 01/07/2023] Open
Abstract
The use of Whole Green Banana Flour (WGBF) in bread production may be a strategy to improve the nutritional profile of bread, but the extent of improvement may depend on the processing conditions of the flour. Therefore, WGBF was produced using two methods (freeze-drying and air-oven drying) and was used in bread-making. This study investigated the effect of flour type-FDF (WGBF produced by freeze-drying) and ODF (prepared by air-oven drying at 50 °C)-at fortification levels of 0% (control), 10%, 20%, and 30% on the fortified bread. A significant decrease in energy caloric value and an increase in moisture and fibre at >20% fortification level (p < 0.05) was noted. The ODF bread samples had a higher browning index compared to the control and the FDF samples. Addition of WGBF improved macro minerals (Mg, Ca, Na, K, and P) with a no significant change in micro minerals (Fe, Zn, and Mn). The use of FDF in bread resulted in a marked increase in resistant and slow digestible starch levels in F30 compared to ODF samples and their comparable fortification levels. The digestibility of the bread samples showed that WGBF can be used as an alternative functional ingredient to prepare bread with better nutritional value.
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Affiliation(s)
- Amir Amini Khoozani
- Department of Food Science, University of Otago, 9016 Dunedin, New Zealand; (B.K.)
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23
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Zhu D, Kebede B, Chen G, McComb K, Frew R. Effects of the vat pasteurization process and refrigerated storage on the bovine milk metabolome. J Dairy Sci 2020; 103:2077-2088. [PMID: 31980231 DOI: 10.3168/jds.2019-17512] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2019] [Accepted: 11/19/2019] [Indexed: 11/19/2022]
Abstract
This study is the first to investigate the evolution of cow milk metabolites throughout the vat pasteurization process and storage using untargeted metabolomics based on a multiplatform approach. Nuclear magnetic resonance and ultraperformance liquid chromatography-quadrupole time-of-flight mass spectrometry were used for fingerprinting water-soluble nutritional compounds, and headspace gas chromatography-mass spectrometry was used to fingerprint the volatile organic compounds. This study demonstrated that vat pasteurization was an efficient and mild means of milk preservation resulting in only minor changes to the metabolites. The pasteurized milk samples exhibited a stable metabolome during the first 8 d of refrigerated storage. However, at the latter stage of storage, the concentrations of pantothenic acid and butyrylcarnitine decreased, whereas some fatty acids, organic acids, α-AA, peptides, and ketones increased. These selected metabolites that changed during milk storage could be used as potential biomarkers to track the storage conditions of pasteurized cow milk.
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Affiliation(s)
- Dan Zhu
- Department of Chemistry, University of Otago, Dunedin, New Zealand 9016; Key Laboratory of Agro-Product Quality and Safety, Institute of Quality Standards and Testing Technology for Agro-Products, Chinese Academy of Agricultural Sciences (CAAS), Beijing, China 100081
| | - Biniam Kebede
- Department of Food Science, University of Otago, Dunedin, New Zealand 9016
| | - Gang Chen
- Key Laboratory of Agro-Product Quality and Safety, Institute of Quality Standards and Testing Technology for Agro-Products, Chinese Academy of Agricultural Sciences (CAAS), Beijing, China 100081
| | - Kiri McComb
- Department of Chemistry, University of Otago, Dunedin, New Zealand 9016
| | - Russell Frew
- Department of Chemistry, University of Otago, Dunedin, New Zealand 9016.
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24
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Arcena MR, Kebede B, Leong SY, Silcock P, Oey I. Feasibility of using integrated fingerprinting, profiling and chemometrics approach to understand (bio) chemical changes throughout commercial red winemaking: A case study on Merlot. Food Res Int 2019; 127:108767. [PMID: 31882091 DOI: 10.1016/j.foodres.2019.108767] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2019] [Revised: 09/09/2019] [Accepted: 10/19/2019] [Indexed: 12/18/2022]
Abstract
This study assessed the feasibility of using a multiplatform approach; integrating untargeted fingerprinting of volatiles and targeted profiling of phenolic and oenological attributes (soluble solids, pH, titratable acidity and colour properties) coupled with chemometrics to understand complex (bio) chemical reactions occurring during Merlot red winemaking. The changes were investigated at three winemaking stages, starting from pre-maceration (PM), maceration-alcoholic fermentation (MAF) up to completion of malolactic fermentation (MLF). Merlot musts at PM were characterised by lighter colour and higher amount of green aroma-related volatiles. Completion of MAF led to increased extraction of anthocyanins, flavonols, and stilbenes, resulting in a more intense and darker fermenting juice. Furthermore, development of yeast-fermentation associated volatiles such as esters and alcohols was observed at this stage. The final wine, when MLF was completed, was rich in phenolic acids, esters, alcohols, and terpenes. The multiplatform analytical approach was effective to unravel the complex reactions throughout Merlot winemaking process and find relevant markers, which could help to predict expected quality attributes in the finished wine.
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Affiliation(s)
- Mylene Ross Arcena
- Department of Food Science, University of Otago, PO BOX 56, Dunedin 9054, New Zealand
| | - Biniam Kebede
- Department of Food Science, University of Otago, PO BOX 56, Dunedin 9054, New Zealand.
| | - Sze Ying Leong
- Department of Food Science, University of Otago, PO BOX 56, Dunedin 9054, New Zealand; Riddet Insititute, Palmerston North, New Zealand
| | - Patrick Silcock
- Department of Food Science, University of Otago, PO BOX 56, Dunedin 9054, New Zealand
| | - Indrawati Oey
- Department of Food Science, University of Otago, PO BOX 56, Dunedin 9054, New Zealand; Riddet Insititute, Palmerston North, New Zealand.
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25
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Pham HTT, Bazmawe M, Kebede B, Buvé C, Hendrickx ME, Van Loey AM. Changes in the Soluble and Insoluble Compounds of Shelf-Stable Orange Juice in Relation to Non-Enzymatic Browning during Storage. J Agric Food Chem 2019; 67:12854-12862. [PMID: 31644283 DOI: 10.1021/acs.jafc.9b05014] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
For the first time in literature, this study revealed the participation of polymeric components of orange juice cloud and pulp (such as proteins, arabinogalactan proteins, or protein-pectin complexes) during nonenzymatic browning. In a quest to better understand the nonenzymatic browning of shelf-stable orange juice during storage, the juice was fractionated into different fractions depending on the solubility in water/ethanol and the obtained fractions were characterized. The results showed that brown compounds that were formed during storage of orange juice were distributed over water insoluble (pulp), ethanol insoluble (cloud), and ethanol soluble (serum) fractions. In the ethanol insoluble fraction, the brown compounds are hypothesized to be associated with proteins, arabinogalactan proteins, and/or protein-pectin complexes of this fraction without significantly changing their molecular weight distributions, monosaccharide compositions, and protein contents. The changes in the ethanol soluble fraction including ascorbic acid degradation, acid-catalyzed hydrolysis of sucrose, and formation of furfural and 5-hydroxymethylfurfural were highly correlated to the browning development of the juice during storage.
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Affiliation(s)
- Huong T T Pham
- KU Leuven , Department of Microbial and Molecular Systems (M2S), Laboratory of Food Technology , Kasteelpark Arenberg 22 box 2457 , 3001 Heverlee , Belgium
| | - Mona Bazmawe
- KU Leuven , Department of Microbial and Molecular Systems (M2S), Laboratory of Food Technology , Kasteelpark Arenberg 22 box 2457 , 3001 Heverlee , Belgium
| | - Biniam Kebede
- KU Leuven , Department of Microbial and Molecular Systems (M2S), Laboratory of Food Technology , Kasteelpark Arenberg 22 box 2457 , 3001 Heverlee , Belgium
- University of Otago , Department of Food Science , Box 56, Dunedin 9054 , New Zealand
| | - Carolien Buvé
- KU Leuven , Department of Microbial and Molecular Systems (M2S), Laboratory of Food Technology , Kasteelpark Arenberg 22 box 2457 , 3001 Heverlee , Belgium
| | - Marc E Hendrickx
- KU Leuven , Department of Microbial and Molecular Systems (M2S), Laboratory of Food Technology , Kasteelpark Arenberg 22 box 2457 , 3001 Heverlee , Belgium
| | - Ann M Van Loey
- KU Leuven , Department of Microbial and Molecular Systems (M2S), Laboratory of Food Technology , Kasteelpark Arenberg 22 box 2457 , 3001 Heverlee , Belgium
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26
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Abstract
Infant formula (IF), regarded as the optimal substitute for human breast milk, is very important for infant growth and development. Phospholipids (PLs) are ubiquitous components of infant formula as they have good emulsifier properties in addition to their nutritional and biological functions. In this study, the PL contents in four different commercial IF brands (indicated as A, M, O, and W) were characterized and quantified using optimized 31P NMR spectroscopy. PLs (nine) were identified and quantified, and among these, phosphatidylethanolamine and sphingomyelin occurred at lower concentrations (5.72 and 8.89 mg/100 g, respectively) in IFs from brand O, whereas phosphatidic acid was higher (2.83 mg/100 g) in IFs from brand W. In summary, 31P NMR spectroscopy, combined with the multivariate data analysis, proved to be an effective analytical toolbox for evaluating the PL contents in IF and the comparative differences between IF brands.
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Affiliation(s)
| | | | | | | | - Gang Chen
- Key Laboratory of Agro-Product Quality and Safety, Institute of Quality Standards and Testing Technology for Agro-Products , Chinese Academy of Agricultural Sciences (CAAS) , Beijing 100081 , China
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27
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High R, Bremer P, Kebede B, Eyres GT. Comparison of Four Extraction Techniques for the Evaluation of Volatile Compounds in Spray-Dried New Zealand Sheep Milk. Molecules 2019; 24:molecules24101917. [PMID: 31109044 PMCID: PMC6571582 DOI: 10.3390/molecules24101917] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2019] [Revised: 05/14/2019] [Accepted: 05/17/2019] [Indexed: 12/03/2022] Open
Abstract
Recent growth and diversification of sheep milk products means more sophisticated methods are required to ensure their flavour quality. The objective of this study was to compare four extraction techniques for the analysis of volatile compounds in sheep milk by gas chromatography-mass spectrometry (GC-MS). Solvent Assisted Flavour Evaporation (SAFE), Solid Phase Microextraction (SPME), Headspace Sorptive Extraction (HSSE) and Stir Bar Sorptive Extraction (SBSE) were evaluated for their sensitivity, selectivity, reproducibility, and overall efficiency. A total of 48 volatile compounds from nine compound classes were identified in the spray-dried sheep milk. Alcohols, aldehydes, alkanes, carboxylic acids, ketones, lactones, sulphur compounds, nitrogen compounds, and terpenes were all present, but the differences between the methods were most apparent for lactones. SBSE extracted eight lactones, SAFE extracted four lactones and HSSE and SPME only detected trace levels of two lactones. Six of the lactones—δ-hexa-lactone, δ-octalactone, γ-decalactone, γ-dodecalactone, δ-tetradecalactone, and δ-hexadeca-lactone—were identified for the first time in spray-dried sheep milk. The present work demonstrated that SBSE is an effective tool for the extraction and analysis of volatiles, especially lactones, in sheep milk and dairy products in general. A discussion of the benefits and limitations of each method is included.
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Affiliation(s)
- Ryan High
- Department of Food Science, University of Otago, PO Box 56, Dunedin 9054, New Zealand.
| | - Phil Bremer
- Department of Food Science, University of Otago, PO Box 56, Dunedin 9054, New Zealand.
| | - Biniam Kebede
- Department of Food Science, University of Otago, PO Box 56, Dunedin 9054, New Zealand.
| | - Graham T Eyres
- Department of Food Science, University of Otago, PO Box 56, Dunedin 9054, New Zealand.
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28
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Nandakumar R, Eyres GT, Burritt DJ, Kebede B, Leus M, Oey I. Impact of Pulsed Electric Fields on the Volatile Compounds Produced in Whole Onions ( Allium cepa and Allium fistulosum). Foods 2018; 7:foods7110183. [PMID: 30405025 PMCID: PMC6262602 DOI: 10.3390/foods7110183] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2018] [Revised: 10/31/2018] [Accepted: 11/05/2018] [Indexed: 11/16/2022] Open
Abstract
The objective of this research was to investigate the effect of pulsed electric field (PEF) processing on the volatile compounds produced in onion cultivars. The changes in the volatile compounds of onions were assessed comparing results observed while measured immediately and 24 h after PEF treatment using headspace solid-phase microextraction gas chromatography-mass spectrometry (HS-SPME-GC-MS). Significant increases in the concentrations of propanethial S-oxide, propenyl propyl thiosulfinate, 2-methyl-2-pentenal, dipropyl disulfide, propenyl propyl disulfide, methyl propyl disulfide, and methyl propenyl disulfide were observed immediately after PEF treatment. The concentrations of propenyl propyl thiosulfinate, dipropyl disulfide, methyl propyl disulfide, dipropyl trisulfide, methyl propyl trisulfide, and propenyl propyl trisulfide increased after 24 h compared to initial concentrations. It is postulated that these changes are due to PEF-induced cell permeabilisation that facilitates enzyme-substrate reactions after the PEF treatment.
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Affiliation(s)
- Rajkumar Nandakumar
- Department of Food Science, University of Otago, P.O. Box 56, Dunedin 9054, New Zealand.
- Department of Botany, University of Otago, P.O. Box 56, Dunedin 9054, New Zealand.
| | - Graham T Eyres
- Department of Food Science, University of Otago, P.O. Box 56, Dunedin 9054, New Zealand.
| | - David J Burritt
- Department of Botany, University of Otago, P.O. Box 56, Dunedin 9054, New Zealand.
| | - Biniam Kebede
- Department of Food Science, University of Otago, P.O. Box 56, Dunedin 9054, New Zealand.
| | - Michelle Leus
- Department of Food Science, University of Otago, P.O. Box 56, Dunedin 9054, New Zealand.
| | - Indrawati Oey
- Department of Food Science, University of Otago, P.O. Box 56, Dunedin 9054, New Zealand.
- Riddet Institute, Private Bag 11 222, Palmerston North 4442, New Zealand.
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29
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Buvé C, Neckebroeck B, Haenen A, Kebede B, Hendrickx M, Grauwet T, Van Loey A. Combining untargeted, targeted and sensory data to investigate the impact of storage on food volatiles: A case study on strawberry juice. Food Res Int 2018; 113:382-391. [DOI: 10.1016/j.foodres.2018.07.022] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2018] [Revised: 06/26/2018] [Accepted: 07/14/2018] [Indexed: 01/31/2023]
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Kebede B, Lee PY, Leong SY, Kethireddy V, Ma Q, Aganovic K, Eyres GT, Hamid N, Oey I. A Chemometrics Approach Comparing Volatile Changes during the Shelf Life of Apple Juice Processed by Pulsed Electric Fields, High Pressure and Thermal Pasteurization. Foods 2018; 7:foods7100169. [PMID: 30336618 PMCID: PMC6210776 DOI: 10.3390/foods7100169] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2018] [Revised: 10/02/2018] [Accepted: 10/15/2018] [Indexed: 11/22/2022] Open
Abstract
High-Pressure Processing (HPP) and Pulsed Electric Fields (PEF) processing technologies are being used increasingly on a commercial basis, with high-quality labelled fruit juices being one of the most important promotion strategies. Quality-related enzymes, which might still be active after HPP and PEF pasteurization, can cause undesirable aroma changes during storage. This study investigated volatile changes during the shelf life of PEF (15.5 kV/cm and specific energy of 158 kJ/L), HPP (600 MPa for 3 min), and thermally (72 °C for 15 s) pasteurized Jazz apple juices—up to five weeks. To have an increased insight into the volatile changes, an integrated instrumental (GC-MS) and data analysis (chemometrics) approach was implemented. Immediately after pasteurization, PEF processing resulted a better retention of odor-active volatiles, such as (E)-2-hexenal and hexyl acetate, whereas thermal processing lowered their amount. During refrigerated storage, these volatiles have gradually decreased in all processed juices. By the end of storage, the amount of these aroma relevant volatiles appears to still be higher in PEF and HPP pasteurized juices compared to their conventional counterparts. This study demonstrated the potential of advanced chemometric approaches to obtain increased insight into complex shelf life changes.
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Affiliation(s)
- Biniam Kebede
- Department of Food Science, University of Otago, P.O. Box 56, Dunedin 9054, New Zealand.
| | - Pui Yee Lee
- Department of Food Science, University of Otago, P.O. Box 56, Dunedin 9054, New Zealand.
| | - Sze Ying Leong
- Department of Food Science, University of Otago, P.O. Box 56, Dunedin 9054, New Zealand.
- Riddet Institute, Private Bag 11 222, Palmerston North 4442, New Zealand.
| | - Vidya Kethireddy
- Department of Food Science, University of Otago, P.O. Box 56, Dunedin 9054, New Zealand.
| | - Qianli Ma
- Faculty of Health and Environmental Science, Auckland University of Technology, Private Bag 9006, Auckland 1142, New Zealand.
| | - Kemal Aganovic
- German Institute of Food Technologies, P.O. Box 1165, D-49610 Quakenbrück, Germany.
| | - Graham T Eyres
- Department of Food Science, University of Otago, P.O. Box 56, Dunedin 9054, New Zealand.
| | - Nazimah Hamid
- Faculty of Health and Environmental Science, Auckland University of Technology, Private Bag 9006, Auckland 1142, New Zealand.
| | - Indrawati Oey
- Department of Food Science, University of Otago, P.O. Box 56, Dunedin 9054, New Zealand.
- Riddet Institute, Private Bag 11 222, Palmerston North 4442, New Zealand.
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Yi J, Kebede B, Kristiani K, Buvé C, Van Loey A, Grauwet T, Hendrickx M. The potential of kiwifruit puree as a clean label ingredient to stabilize high pressure pasteurized cloudy apple juice during storage. Food Chem 2018; 255:197-208. [DOI: 10.1016/j.foodchem.2018.02.052] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2017] [Revised: 02/07/2018] [Accepted: 02/10/2018] [Indexed: 10/18/2022]
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Buvé C, Van Bedts T, Haenen A, Kebede B, Braekers R, Hendrickx M, Van Loey A, Grauwet T. Shelf-life dating of shelf-stable strawberry juice based on survival analysis of consumer acceptance information. J Sci Food Agric 2018; 98:3437-3445. [PMID: 29280150 DOI: 10.1002/jsfa.8856] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/2017] [Revised: 12/14/2017] [Accepted: 12/16/2017] [Indexed: 06/07/2023]
Abstract
BACKGROUND Accurate shelf-life dating of food products is crucial for consumers and industries. Therefore, in this study we applied a science-based approach for shelf-life assessment, including accelerated shelf-life testing (ASLT), acceptability testing and the screening of analytical attributes for fast shelf-life predictions. Shelf-stable strawberry juice was selected as a case study. RESULTS Ambient storage (20 °C) had no effect on the aroma-based acceptance of strawberry juice. The colour-based acceptability decreased during storage under ambient and accelerated (28-42 °C) conditions. The application of survival analysis showed that the colour-based shelf-life was reached in the early stages of storage (≤11 weeks) and that the shelf-life was shortened at higher temperatures. None of the selected attributes (a* and ΔE* value, anthocyanin and ascorbic acid content) is an ideal analytical marker for shelf-life predictions in the investigated temperature range (20-42 °C). Nevertheless, an overall analytical cut-off value over the whole temperature range can be selected. CONCLUSIONS Colour changes of strawberry juice during storage are shelf-life limiting. Combining ASLT with acceptability testing allowed to gain faster insight into the change in colour-based acceptability and to perform shelf-life predictions relying on scientific data. An analytical marker is a convenient tool for shelf-life predictions in the context of ASLT. © 2017 Society of Chemical Industry.
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Affiliation(s)
- Carolien Buvé
- Laboratory of Food Technology, Department of Microbial and Molecular Systems (M2S), KU Leuven, Heverlee, Belgium
| | - Tine Van Bedts
- Laboratory of Food Technology, Department of Microbial and Molecular Systems (M2S), KU Leuven, Heverlee, Belgium
| | - Annelien Haenen
- Laboratory of Food Technology, Department of Microbial and Molecular Systems (M2S), KU Leuven, Heverlee, Belgium
| | - Biniam Kebede
- Laboratory of Food Technology, Department of Microbial and Molecular Systems (M2S), KU Leuven, Heverlee, Belgium
- Department of Food Science, University of Otago, Dunedin, New Zealand
| | - Roel Braekers
- Interuniversity Institute for Biostatistics and statistical Bioinformatics, Universiteit Hasselt, Martelarenlaan, Hasselt, Belgium
- Interuniversity Institute for Biostatistics and statistical Bioinformatics, KU Leuven, Kapucijnenvoer, Leuven, Belgium
| | - Marc Hendrickx
- Laboratory of Food Technology, Department of Microbial and Molecular Systems (M2S), KU Leuven, Heverlee, Belgium
| | - Ann Van Loey
- Laboratory of Food Technology, Department of Microbial and Molecular Systems (M2S), KU Leuven, Heverlee, Belgium
| | - Tara Grauwet
- Laboratory of Food Technology, Department of Microbial and Molecular Systems (M2S), KU Leuven, Heverlee, Belgium
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Morales-Soriano E, Kebede B, Ugás R, Grauwet T, Van Loey A, Hendrickx M. Flavor characterization of native Peruvian chili peppers through integrated aroma fingerprinting and pungency profiling. Food Res Int 2018; 109:250-259. [PMID: 29803448 DOI: 10.1016/j.foodres.2018.04.030] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2018] [Revised: 03/30/2018] [Accepted: 04/14/2018] [Indexed: 10/17/2022]
Abstract
A broad range of Peruvian chili peppers are available but not properly characterized. To increase the insight into their flavor compounds, a head space GC-MS fingerprinting (volatiles) and an HPLC-based profiling approach (pungency) was implemented to characterize twenty landraces (Capsicum annuum, C. baccatum and C. chinense). The data obtained was analyzed with powerful chemometric approaches to identify unique flavor compounds for each of the species and for each of the landraces within a specific species. The pungency profile and volatiles such as esters, terpenes and norcarotenoids distinguish Cerezo triangular (4) (C. annuum). Mainly esters provoked the separation between Chico (42), Cacho de cabra rojo (323), Amarillo de Chachapoyas (318) (C. baccatum), Arnaucho (60) and Miscucho amarillo (69) (C. chinense). This study demonstrates the potential of the integrated fingerprinting, profiling and a chemometric approach to extensively understand the unique flavor compounds in Peruvian chili peppers.
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Affiliation(s)
- Eduardo Morales-Soriano
- Laboratory of Food Technology, Leuven Food Science and Nutrition Research Center (LFoRCe), Department of Microbial and Molecular Systems (M(2)S), KU Leuven, Kasteelpark Arenberg 22 Box 2457, 3001 Heverlee, Belgium; Faculty of Food Industries, Universidad Nacional Agraria La Molina, Av. La Molina s/n, La Molina, Peru.
| | - Biniam Kebede
- Laboratory of Food Technology, Leuven Food Science and Nutrition Research Center (LFoRCe), Department of Microbial and Molecular Systems (M(2)S), KU Leuven, Kasteelpark Arenberg 22 Box 2457, 3001 Heverlee, Belgium; Department of Food Science, PO Box 56, Dunedin 9054, University of Otago, New Zealand
| | - Roberto Ugás
- Vegetable Crops Research Program, Faculty of Agronomy, Universidad Nacional Agraria La Molina, Av. La Molina s/n, La Molina, Peru
| | - Tara Grauwet
- Laboratory of Food Technology, Leuven Food Science and Nutrition Research Center (LFoRCe), Department of Microbial and Molecular Systems (M(2)S), KU Leuven, Kasteelpark Arenberg 22 Box 2457, 3001 Heverlee, Belgium
| | - Ann Van Loey
- Laboratory of Food Technology, Leuven Food Science and Nutrition Research Center (LFoRCe), Department of Microbial and Molecular Systems (M(2)S), KU Leuven, Kasteelpark Arenberg 22 Box 2457, 3001 Heverlee, Belgium
| | - Marc Hendrickx
- Laboratory of Food Technology, Leuven Food Science and Nutrition Research Center (LFoRCe), Department of Microbial and Molecular Systems (M(2)S), KU Leuven, Kasteelpark Arenberg 22 Box 2457, 3001 Heverlee, Belgium
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Kebede B, Grauwet T, Andargie T, Sempiri G, Palmers S, Hendrickx M, Van Loey A. Kinetics of Strecker aldehyde formation during thermal and high pressure high temperature processing of carrot puree. INNOV FOOD SCI EMERG 2017. [DOI: 10.1016/j.ifset.2016.10.022] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Deribew A, Kebede B, Tessema GA, Adama YA, Misganaw A, Gebre T, Hailu A, Biadgilign S, Amberbir A, Desalegn B, Abajobir AA, Shafi O, Abera SF, Negussu N, Mengistu B, Amare AT, Mulugeta A, Kebede Z, Mengistu B, Tadesse Z, Sileshi M, Tamiru M, Chromwel EA, Glenn SD, Stanaway JD, Deribe K. Mortality and Disability-Adjusted Life-Years (Dalys) for Common Neglected Tropical Diseases in Ethiopia, 1990-2015: Evidence from the Global Burden of Disease Study 2015. Ethiop Med J 2017; 55:3-14. [PMID: 28878427 PMCID: PMC5582634] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
INTRODUCTION Neglected tropical diseases (NTDs) are important public health problems in Ethiopia. In 2013, the Federal Ministry of Health (FMOH) has launched a national NTD master plan to eliminate major NTDs of public health importance by 2020. Benchmarking the current status of NTDs in the country is important to monitor and evaluate the progress in the implementation of interventions and their impacts. Therefore, this study aims to assess the trends of mortality and Disability-adjusted Life-Years (DALY) for the priority NTDs over the last 25 years. METHODS We used the Global Burden of Disease (GBD) 2015 estimates for this study. The GBD 2015 data source for cause of death and DALY estimation included verbal autopsy (VA), Demographic and Health Surveys (DHS), and other disease specific surveys, Ministry of Health reports submitted to United Nations (UN) agencies and published scientific articles. Cause of Death Ensemble modeling (CODEm) and/or natural history models were used to estimate NTDs mortality rates. DALY were estimated as the sum of Years of Life Lost (YLL) due to premature mortality and Years Lived with Disability (YLD). RESULTS All NTDs caused an estimated of 6,293 deaths (95% uncertainty interval (UI): 3699-10,080) in 1990 and 3,593 deaths (95% UI: 2051 - 6178) in 2015, a 43% reduction over the 25 years. Age-standardized mortality rates due to schistosomiasis, STH and leshmaniasis have declined by 91.3%, 73.5% and 21.6% respectively between 1990 to 2015. The number of DALYs due to all NTDs has declined from 814.4 thousand (95% UI: 548 thousand-1.2million) in 1990 to 579.5 thousand (95%UI: 309.4 thousand-1.3 million) in 2015. Age-standardized DALY rates due to all NTDs declined by 30.7%, from 17.6 per 1000(95%UI: 12.5-26.5) in 1990 to 12.2 per 1000(95%UI: 6.5 - 27.4) in 2015. Age-standardized DALY rate for trachoma declined from 92.7 per 100,000(95% UI: 63.2 - 128.4) in 1990 to 41.2 per 100,000(95%UI: 27.4-59.2) in 2015, a 55.6% reduction between 1990 and 2015. Age-standardized DALY rates for onchocerciasis, schistosomiasis and lymphiaticfilariasis decreased by 66.2%, 29.4% and 12.5% respectively between 1990 and 2015. DALY rate for ascariasis fell by 56.8% over the past 25 years. CONCLUSIONS Ethiopia has made a remarkable progress in reducing the DALY rates for most of the NTDs over the last 25 years. The rapid scale of interventions and broader system strengthening may have a lasting impact on achieving the 2020 goal of elimination of most of NTDs. Ethiopia should strengthen the coverage of integrated interventions of NTD through proper coordination with other health programs and sectors and community participation to eliminate NTDs by 2020.
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Affiliation(s)
- A Deribew
- St. Paul Millennium Medical College, Addis Ababa, Ethiopia
- Dilla University, Dilla, Ethiopia
- Micronutrient Initiative, Ethiopia
| | - B Kebede
- Federal Ministry of Health, Addis Ababa, Ethiopia
| | - GA Tessema
- Department Reproductive Health, Institute of Public Health, University of Gondar, Gondar, Ethiopia
- School of Public Health, The University of Adelaide, Adelaide, Australia
| | - YA Adama
- School of Medicine, The University of Adelaide, Adelaide South Australia
- School of Public Health, Mekelle University, Mekelle, Ethiopia
| | - A Misganaw
- Institute for Health Metrics and Evaluation, University of Washington
| | - T Gebre
- International Trachoma Initiative, the Task Force for Global Health, Addis Ababa, Ethiopia
| | - A Hailu
- School of Medicine, Addis Ababa University, Addis Ababa, Ethiopia
| | | | | | - B Desalegn
- University of South Australia, Adelaide, Australia
| | - AA Abajobir
- School of Public Health, the University of Queensland, Queensland, Australia
- Debremarkos University, Debremarkos, Ethiopia
| | - O Shafi
- Rollind schools of public Health, Emory University, USA
| | - SF Abera
- School of Public Health, Mekelle University, Mekelle, Ethiopia
- Institute of Biological Chemistry and Nutrition, Hohenheim University, Stuttgart, Germany
| | - N Negussu
- Federal Ministry of Health, Addis Ababa, Ethiopia
| | - B Mengistu
- Federal Ministry of Health, Addis Ababa, Ethiopia
| | - AT Amare
- School of Medicine, The University of Adelaide, Adelaide South Australia
- College of Medicine and Health Sciences, Bahir Dar University, Bahir Dar, Ethiopia
| | - A Mulugeta
- World Health Organization, Addis Ababa, Ethiopia
| | - Z Kebede
- World Health Organization, Addis Ababa, Ethiopia
| | - B Mengistu
- Federal Ministry of Health, Addis Ababa, Ethiopia
| | - Z Tadesse
- The Carter Centre, Addis Ababa, Ethiopia
| | - M Sileshi
- Federal Ministry of Health, Addis Ababa, Ethiopia
| | - M Tamiru
- Federal Ministry of Health, Addis Ababa, Ethiopia
| | - EA Chromwel
- Institute for Health Metrics and Evaluation, University of Washington
| | - SD Glenn
- Institute for Health Metrics and Evaluation, University of Washington
| | - JD Stanaway
- Institute for Health Metrics and Evaluation, University of Washington
| | - K Deribe
- Wellcome Trust Brighton & Sussex Centre for Global Health Research, Brighton & Sussex Medical School, Falmer, Brighton, UK
- School of Public Health, Addis Ababa University, Ethiopia
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Klinkenberg E, Assefa D, Rusen ID, Dlodlo RA, Shimeles E, Kebede B, Fiseha D, Tsegaye F, Leimane I, Teklai Y, Dacombe R, Aseffa A. The Ethiopian initiative to build sustainable capacity for operational research: overview and lessons learned. Public Health Action 2015; 4:S2-7. [PMID: 26478509 DOI: 10.5588/pha.14.0051] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2014] [Accepted: 06/20/2014] [Indexed: 12/17/2022] Open
Abstract
SETTING Programme-based operational research is instrumental for the enhancement of tuberculosis (TB) control. In 2012, the Ethiopian Federal Ministry of Health launched an initiative for capacity building in operational research (OR). OBJECTIVE To develop sustainable capacity for OR in Ethiopia in a multiyear initiative. DESIGN The initiative was developed in collaboration with regional, national and international experts. Teams representing regions in Ethiopia conducted OR addressing national and regional priorities. To make use of local expertise and increase sustainability, a domestic mentor training programme was included. Existing capacity was enhanced through a competitive grant scheme providing TB researchers with financial and technical support. The Ethiopian Tuberculosis Research Advisory Committee was also supported in its functions. Regional ethics review bodies were strengthened or established where they did not exist. RESULTS Fifty-two people were trained and conducted 13 OR projects, of which six have been published to date. In addition, eight protocols were supported through grants. Ethics review bodies were strengthened in all regions. CONCLUSION The initiative trained participants from all regions and succeeded in the completion of all stages of the OR process. The success of the programme can be attributed to the team approach, 'learning while doing', integrated mentorship programme and strong national ownership.
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Affiliation(s)
- E Klinkenberg
- KNCV Tuberculosis Foundation, The Hague, The Netherlands ; Department of Global Health, Academic Medical Centre, University of Amsterdam, Amsterdam Institute for Global Health and Development, Amsterdam, The Netherlands
| | - D Assefa
- TB CARE I/KNCV Tuberculosis Foundation, Addis Ababa, Ethiopia
| | - I D Rusen
- International Union Against Tuberculosis and Lung Disease, Paris, France
| | - R A Dlodlo
- International Union Against Tuberculosis and Lung Disease, Paris, France
| | - E Shimeles
- TB CARE I/KNCV Tuberculosis Foundation, Addis Ababa, Ethiopia
| | - B Kebede
- Federal Ministry of Health, Addis Ababa
| | - D Fiseha
- TB CARE I/KNCV Tuberculosis Foundation, Addis Ababa, Ethiopia ; Armauer Hansen Research Institute, Addis Ababa ; Tuberculosis Research Advisory Committee, Federal Ministry of Health, Addis Ababa
| | - F Tsegaye
- TB CARE I/KNCV Tuberculosis Foundation, Addis Ababa, Ethiopia ; Armauer Hansen Research Institute, Addis Ababa ; Tuberculosis Research Advisory Committee, Federal Ministry of Health, Addis Ababa
| | - I Leimane
- KNCV Tuberculosis Foundation, The Hague, The Netherlands
| | - Y Teklai
- Independent consultant, Addis Ababa, Ethiopia
| | - R Dacombe
- Liverpool School of Tropical Medicine, Liverpool, United Kingdom
| | - A Aseffa
- Armauer Hansen Research Institute, Addis Ababa ; Tuberculosis Research Advisory Committee, Federal Ministry of Health, Addis Ababa
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Marai W, Tinsae MW, Kebede B. Aggressive angiomyxoma of the pelvis and perineum: case study. Ethiop Med J 2000; 38:119-23. [PMID: 11144883] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/18/2023]
Abstract
Aggressive angiomyxoma (AAM) is a rare locally aggressive tumor affecting the pelvis and perineum of young females. Histopathologically, it is characterized by fibreoblasts in a myxoid background with vascular proliferation, scanty mitotic figure and no real capsule. AAM needs to be considered in the differential diagnosis of vulval mass in a reproductive age woman. We describe the first Ethiopian case of huge, recurrent, AAM of the pelvis and perineum in a 35 year old para II lady and stress that early diagnosis offers a better option for treatment by wide local excision and low recurrence rate.
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Affiliation(s)
- W Marai
- Department of Gyn/Obs Jimma Institute of Health Sciences, P.O.Box 378, Jimma
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Mahon AC, Nurlign A, Kebede B, Becx-Bleumink M, Lefford MJ. Urinary phenolic glycolipid 1 in the diagnosis and management of leprosy. J Infect Dis 1991; 163:653-6. [PMID: 1995739 DOI: 10.1093/infdis/163.3.653] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
A simplified assay to measure the phenolic glycolipid 1 (PGL-1) of Mycobacterium leprae in the urine was applied to the diagnosis of leprosy and the monitoring of antileprosy chemotherapy. One hundred seventy-nine previously untreated patients and 25 normal controls were tested. The specificity of the assay was 100%. There were no false-positive results. The sensitivity of the assay varied with the type of leprosy from 92% for lepromatous leprosy to 56% for borderline lepromatous and 18% for borderline tuberculoid patients. After the onset of chemotherapy in lepromatous leprosy patients, there was often a transient increase of urinary PGL-1, followed by a steady decline. Within 3 months of multiple drug therapy, urinary PGL-1 levels were reduced by 90%-99% and were often undetectable. This assay appears to have considerable potential for monitoring chemotherapy and detecting treatment failure and relapse in patients with Hansen's disease.
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Affiliation(s)
- A C Mahon
- Armauer Hansen Research Institute, Addis Ababa, Ethiopia
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