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Siu VS, Lu M, Hsieh KY, Wen B, Buleje I, Hinds N, Patel K, Dang B, Budd R. Development of a Quantitative Digital Urinalysis Tool for Detection of Nitrite, Protein, Creatinine, and pH. Biosensors (Basel) 2024; 14:70. [PMID: 38391989 PMCID: PMC10887154 DOI: 10.3390/bios14020070] [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] [Subscribe] [Scholar Register] [Received: 01/05/2024] [Revised: 01/23/2024] [Accepted: 01/26/2024] [Indexed: 02/24/2024]
Abstract
This paper presents a cost-effective, quantitative, point-of-care solution for urinalysis screening, specifically targeting nitrite, protein, creatinine, and pH in urine samples. Detecting nitrite is crucial for the early identification of urinary tract infections (UTIs), while regularly measuring urinary protein-to-creatinine (UPC) ratios aids in managing kidney health. To address these needs, we developed a portable, transmission-based colorimeter using readily available components, controllable via a smartphone application through Bluetooth. Multiple colorimetric detection strategies for each analyte were identified and tested for sensitivity, specificity, and stability in a salt buffer, artificial urine, and human urine. The colorimeter successfully detected all analytes within their clinically relevant ranges: nitrite (6.25-200 µM), protein (2-1024 mg/dL), creatinine (2-1024 mg/dL), and pH (5.0-8.0). The introduction of quantitative protein and creatinine detection, and a calculated urinary protein-to-creatinine (UPC) ratio at the point-of-care, represents a significant advancement, allowing patients with proteinuria to monitor their condition without frequent lab visits. Furthermore, the colorimeter provides versatile data storage options, facilitating local storage on mobile devices or in the cloud. The paper further details the setup of the colorimeter's secure connection to a cloud-based environment, and the visualization of time-series analyte measurements in a web-based dashboard.
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Affiliation(s)
- Vince S. Siu
- IBM T.J. Watson Research Center, Yorktown Heights, NY 10598, USA; (M.L.); (K.Y.H.); (B.W.); (I.B.); (N.H.); (K.P.); (B.D.); (R.B.)
| | - Minhua Lu
- IBM T.J. Watson Research Center, Yorktown Heights, NY 10598, USA; (M.L.); (K.Y.H.); (B.W.); (I.B.); (N.H.); (K.P.); (B.D.); (R.B.)
| | - Kuan Yu Hsieh
- IBM T.J. Watson Research Center, Yorktown Heights, NY 10598, USA; (M.L.); (K.Y.H.); (B.W.); (I.B.); (N.H.); (K.P.); (B.D.); (R.B.)
- Institute of Biomedical Engineering, College of Electrical and Computer Engineering, National Yang Ming Chiao Tung University, Hsinchu 30010, Taiwan
- Department of Electrical and Computer Engineering, College of Electrical and Computer Engineering, National Yang Ming Chiao Tung University, Hsinchu 30010, Taiwan
| | - Bo Wen
- IBM T.J. Watson Research Center, Yorktown Heights, NY 10598, USA; (M.L.); (K.Y.H.); (B.W.); (I.B.); (N.H.); (K.P.); (B.D.); (R.B.)
| | - Italo Buleje
- IBM T.J. Watson Research Center, Yorktown Heights, NY 10598, USA; (M.L.); (K.Y.H.); (B.W.); (I.B.); (N.H.); (K.P.); (B.D.); (R.B.)
| | - Nigel Hinds
- IBM T.J. Watson Research Center, Yorktown Heights, NY 10598, USA; (M.L.); (K.Y.H.); (B.W.); (I.B.); (N.H.); (K.P.); (B.D.); (R.B.)
| | - Krishna Patel
- IBM T.J. Watson Research Center, Yorktown Heights, NY 10598, USA; (M.L.); (K.Y.H.); (B.W.); (I.B.); (N.H.); (K.P.); (B.D.); (R.B.)
| | - Bing Dang
- IBM T.J. Watson Research Center, Yorktown Heights, NY 10598, USA; (M.L.); (K.Y.H.); (B.W.); (I.B.); (N.H.); (K.P.); (B.D.); (R.B.)
| | - Russell Budd
- IBM T.J. Watson Research Center, Yorktown Heights, NY 10598, USA; (M.L.); (K.Y.H.); (B.W.); (I.B.); (N.H.); (K.P.); (B.D.); (R.B.)
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Celebioglu B, Hart JP, Porch T, Griffiths P, Myers JR. Genome-Wide Association Study to Identify Possible Candidate Genes of Snap Bean Leaf and Pod Color. Genes (Basel) 2023; 14:2234. [PMID: 38137056 PMCID: PMC10742591 DOI: 10.3390/genes14122234] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2023] [Revised: 12/11/2023] [Accepted: 12/14/2023] [Indexed: 12/24/2023] Open
Abstract
Color can be an indicator of plant health, quality, and productivity, and is useful to researchers to understand plant nutritional content in their studies. Color may be related to chlorophyll content and photosynthetic activity and provides information for those studying diseases and mineral nutrition because every nutrient deficiency and many diseases produce symptoms that affect color. In order to identify significant loci related to both leaf and pod color in a snap bean (Phaseolus vulgaris L.) diversity panel, a genome-wide association study (GWAS) was carried out. Leaf color in one and pod traits in multiple environments were characterized using a colorimeter. L*a*b* color data were recorded and used to calculate chroma (C*) and hue angle (H°). Leaves were evaluated at three positions (lower, middle, and upper) in the canopy and both pod exterior and interior colors were obtained. GWAS was conducted using two reference genomes that represent the Andean (G19833) and Middle American (5-593) domestication centers. Narrow sense heritabilities were calculated using the mixed linear model (MLM) method in genome association and prediction integrated tool (GAPIT), and significant single nucleotide polymorphisms (SNPs) for each color parameter were obtained using the Bayesian-information and linkage-disequilibrium iteratively nested keyway (BLINK) GWAS model with two principal components (PCAs). In comparison to pod color traits, narrow sense heritabilities of leaf traits were low and similar for both reference genomes. Generally, narrow sense heritability for all traits was highest in the lower, followed by middle, and then upper leaf positions. Heritability for both pod interior and exterior color traits was higher using the G19833 reference genome compared to 5-593 when evaluated by year and means across years. Forty-five significant SNPs associated with leaf traits and 872 associated with pods, totaling 917 significant SNPs were identified. Only one SNP was found in common for both leaf and pod traits on Pv03 in the 5-593 reference genome. One-hundred thirteen significant SNPs, 30 in leaves and 83 in pods had phenotypic variation explained (PVE) of 10% or greater. Fourteen SNPs (four from G19833 and ten from 5-593) with ≥10 PVE%, large SNP effect, and largest p-value for L* and H° pod exterior was identified on Pv01, Pv02, Pv03, and Pv08. More SNPs were associated with pod traits than with leaf traits. The pod interior did not exhibit colors produced by anthocyanins or flavonols which allowed the differentiation of potential candidate genes associated with chloroplast and photosynthetic activity compared to the pod exterior where candidate genes related to both flavonoids and photosynthesis affected color. Several SNPs were associated with known qualitative genes including the wax pod locus (y), persistent color (pc), purple pods (V), and two genes expressed in seeds but not previously reported to affect other plant tissues (B and J). An evaluation of significant SNPs within annotated genes found a number, within a 200 kb window, involved in both flavonoid and photosynthetic biosynthetic pathways.
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Affiliation(s)
- Burcu Celebioglu
- Department of Horticulture, Oregon State University, 4017 Ag & Life Science Bldg., Corvallis, OR 97331, USA;
| | - John P. Hart
- USDA-ARS, Tropical Agriculture Research Station (TARS), 2200 P. A. Campos Ave., Suite 201, Mayagüez, PR 00680, USA; (J.P.H.); (T.P.)
| | - Timothy Porch
- USDA-ARS, Tropical Agriculture Research Station (TARS), 2200 P. A. Campos Ave., Suite 201, Mayagüez, PR 00680, USA; (J.P.H.); (T.P.)
| | - Phillip Griffiths
- School of Integrated Plant Sciences, Horticulture Section, Cornell Agritech, 635 W. North St., Geneva, NY 14456, USA;
| | - James R. Myers
- Department of Horticulture, Oregon State University, 4017 Ag & Life Science Bldg., Corvallis, OR 97331, USA;
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Sonenblum SE, Patel R, Phrasavath S, Xu S, Bates-Jensen BM. Using Technology to Detect Erythema Across Skin Tones. Adv Skin Wound Care 2023; 36:524-533. [PMID: 37729162 PMCID: PMC10545068 DOI: 10.1097/asw.0000000000000043] [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: 06/05/2023] [Accepted: 07/17/2023] [Indexed: 09/22/2023]
Abstract
OBJECTIVE To examine the effectiveness of the ColorMeter DSM III (ColorMeter; Cortex Technology) at grouping individuals by skin tone and measuring erythema/skin discoloration after erythema induction across skin tones. METHODS This pre/post experimental study induced erythema on a convenience sample of 61 healthy adults. Skin tone at baseline was measured using the ColorMeter, Munsell Soil Color Chart 5YR (Munsell), and Pantone SkinTone Guide (Pantone) and compared with the Eumelanin Human Skin Colour Scale (Eumelanin Scale) groupings. Erythema and melanin values on the arm immediately and after recovery time were compared with baseline values. Melanin was measured at five body regions on the face and arm. RESULTS Participants were predominantly women (64% [n = 39] women, 36% [n = 22] men) and young (mean, 28.8 ± 14.3 years); 5% (n = 3) were Hispanic, 26% (n = 16) Asian, 29% (n = 18) Black, 38% (n = 23) White, and 7% (n = 4) identified with more than one race. ColorMeter lightness (L*) and melanin measures were strongly correlated with both Munsell and Pantone values. Munsell skin tone groups were not aligned with Eumelanin Scale groupings. Most participants were in the Eumelanin intermediate-low group, and this changed depending on which body location melanin value was used. The change in erythema from baseline did not differ significantly across skin tone groups at the ulnar head, but on the forearm at the delayed time point, significant differences existed between light and both medium and dark skin tone groups (P = .001; 95% CI, 0.04-0.37). CONCLUSIONS The ColorMeter provides an effective objective measure of skin tone and erythema/discoloration across various skin tones and may improve on current standards for detection. The proposed Eumelanin Scale-Modified provides additional sensitivity for persons with medium skin tones.
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Affiliation(s)
- Sharon Eve Sonenblum
- Sharon Eve Sonenblum, PhD, is Principal Research Scientist, George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, Georgia, USA. Rahee Patel, DPT, Sarah Phrasavath, DPT, and Sharon Xu, DPT, are Student Researchers, Emory University, Atlanta. Barbara M. Bates-Jensen, PhD, RN, FAAN, is Professor of Nursing and Medicine, University of California, Los Angeles
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Tawfik NZ, Anbar MT, Atwa MA. Assessment of changes in color and size of vitiligo lesions during treatment with narrow band ultraviolet B. J Cosmet Dermatol 2022; 21:3522-3529. [PMID: 34806278 DOI: 10.1111/jocd.14625] [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: 08/06/2021] [Revised: 10/23/2021] [Accepted: 11/09/2021] [Indexed: 11/27/2022]
Abstract
BACKGROUND Many treatment modalities have been used to stabilize vitiligo and induce repigmentation. Several methods were used to monitor the color changes inside the treated lesions such as spectroscopes and colorimeters that measure the melanin index inside the lesion. OBJECTIVE To study whether the colorimeter and point counting technique can be used as objective methods in monitoring vitiligo lesions during treatment with Nb-UVB. METHODS Twenty randomly chosen patients with non-segmental vitiligo were enrolled in this interventional study. Vitiligo disease activity score was recorded in each patient. Patients received Nb-UVB three times per week for 6 months. Two lesions were chosen in each patient, and each lesion was assessed for size using point counting technique and degree of color using the Dermacatch® at the beginning of the treatment and evaluated for changes in color and size every 4 weeks till the end of the treatment. RESULTS After 6 months of treatment, regarding the lesion size, 90% of lesions showed variable degrees of repigmentation and 10% showed increase in size, indicating increased activity of the disease, and regarding to color changes. We noticed that after one month of Nb-UVB treatment, there is marked increase in MI measurements in many lesions before any clinical improvement appeared, while at the end of treatment, inside the lesion; 95% showed an increase in melanin index and 5% showed no elevation. While the color changes outside the lesion showed 75% of lesions increased in melanin index, 15% remained unchanged and 10% of the lesions showed decrease in melanin index. CONCLUSION Colorimeter was able to detect change in color after only one month of treatment before it was clinically apparent which means that it can be used as a prognostic tool.
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Affiliation(s)
- Noha Z Tawfik
- Faculty of Medicine, Suez Canal University, Ismailia, Egypt
| | | | - Mona A Atwa
- Faculty of Medicine, Suez Canal University, Ismailia, Egypt
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Baygeldi SB, Güzel BC, Şeker U. Colorimetric evaluation of cross-sectional silicone plastination of the Total head region of sheep and Deplastination of the histological sections of brain tissue. Anat Histol Embryol 2022; 51:542-548. [PMID: 35726566 DOI: 10.1111/ahe.12827] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2022] [Revised: 05/21/2022] [Accepted: 05/31/2022] [Indexed: 12/01/2022]
Abstract
The aim of the study is to protect and preserve the cross-sectional diagnostic characteristics of the anatomy samples by using silicone plastination method, to examine them both macroscopically and microscopically, and to use them as an educational material. After the dissection procedures of 10 total sheep heads obtained from the slaughterhouse were completed, they were freshly frozen and sliced to prepare cross-sectional samples. Then, statistical analysis was performed after the colorimetric measurements. For microscopic examination, 30 brain samples were divided into three groups (Fresh-F, plastination-P, plastination/deplastination-P/D). Of the total brain samples, 20 were subject to routine plastination protocol. After the plastination/deplastination procedure, the changes occurring in cerebral histology were compared. In terms of tissue preservation, the effect of plastination and deplastination was examined using a light microscope. Plastinates subject to silicone plastination under room temperature were very similar to their natural appearance, and it was observed that they preserved their morphological features. Colour changes in the tissues were statistically evaluated. Volumetric shrinkages were observed as qualitative, especially in the brain. As a result of the evaluation done, it was seen that deplastination with toluene is not possible for the brain tissues. In addition, it was not possible to take cross sections of the plastinated tissues that were not deplastinated. On the contrary, findings regarding that deplastination with 5% sodium methoxide dissolved in methanol can allow microscopic examination in long-term preserved plastinated brain tissues were obtained.
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Affiliation(s)
- Saime Betül Baygeldi
- Department of Anatomy, Faculty of Veterinary Medicine, Fırat University, Elazig, Turkey
| | - Barış Can Güzel
- Department of Anatomy, Faculty of Veterinary Medicine, Fırat University, Elazig, Turkey
| | - Uğur Şeker
- Department of Histology and Embryology, Faculty of Medicine, Harran University, Sanliurfa, Turkey
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Shao Y, Chen H, Lin H, Feng H, Gong J, Cao G, Hong W, Yao Y, Zou H, Yan Y. Exploration on Varying Patterns of Morphological Features and Quality of Armeniacae Semen Amarum in Rancid Process Based on Colorimeter, Electronic Nose, and GC/MS Coupled With Human Panel. Front Pharmacol 2022; 13:599979. [PMID: 35592420 PMCID: PMC9110824 DOI: 10.3389/fphar.2022.599979] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2020] [Accepted: 02/24/2022] [Indexed: 11/13/2022] Open
Abstract
In recent years, the domestic and international trade volumes of Chinese medicinal materials (CMMs) keep increasing. By the end of 2019, the total amount of exported CMMs reached as high as US $1.137 billion, while imported was US $2.155 billion. A stable and controllable quality system of CMMs apparently becomes the most important issue, which needs multifaceted collaboration from harvesting CMMs at a proper season to storing CMMs at a proper temperature. However, due to imperfect storage conditions, different kinds of deteriorations are prone to occur, for instance, get moldy or rancid, which not only causes a huge waste of CMM resources but also poses a great threat to clinical medication safety and public health. The key issue is to quickly and accurately distinguish deteriorated CMM samples so as to avoid consuming low-quality or even harmful CMMs. However, some attention has been paid to study the changing quality of deteriorated CMMs and a suitable method for identifying them. In this study, as a medicine and food material which easily becomes rancid, armeniacae semen amarum (ASA) was chosen as a research objective, and experimental ASA samples of different rancidness degrees were collected. Then, various kinds of analytical methods and technologies were applied to explore the changing rules of ASA quality and figure out the key indicators for the quality evaluation of ASA in the rancid process, including the human panel, colorimeter, electronic nose, and GC/MS. This study aims to analyze the correlation between the external morphological features and the inner chemical compounds, to find out the specific components from "quantitative change" to "qualitative change" in the process of "getting rancid," and to discover the dynamic changes in the aforementioned key indicators at different stages of rancidness. The results showed since ASA samples began to get rancid with the extension of storage time, morphological features, namely, surface color and smell, changed significantly, and the degree of rancidness further deepened at the same time. Based on macroscopic identification accomplished via the human panel, ASA samples with varying degrees of rancidness were divided into four groups. The result of colorimeter analysis was in agreement with that of the human panel, as well as the determination of the amygdalin content and peroxide value. Moreover, there were obvious differences in the amygdalin content and peroxide value among ASA samples with different rancidness degrees. With a higher degree of rancidness, the content of amygdalin decreased, while the peroxide value increased significantly. The rancidness degree of ASA has a negative correlation with the amygdalin content and a positive correlation with the peroxide value. The newly discovered nonanal and 2-bromopropiophenone in rancid ASA samples may be the key components of "rancidity smell," and these two components would be the exclusive components that trigger "quantitative change" to "qualitative change" in the process of rancidness of ASA. This study sheds light on studying the internal mechanism of "rancidness" of CMMs and provides an important basis for the effective storage and safe medication of easy-to-get rancid herbs, and it also plays an important foundation for the establishment of a stable and controllable quality system for CMMs.
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Affiliation(s)
- Yuanyang Shao
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing, China.,Department of Chinese Medicine, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Huirong Chen
- Clinical Study Department, Beijing Highthink Pharmaceutical Technology Service Co., Ltd., Beijing, China
| | - Hongxin Lin
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing, China
| | - Huishang Feng
- Department of Dermatology, Dongzhimen Hospital Beijing University of Chinese Medicine, Beijing, China
| | - Jianting Gong
- Chinese Medicine Resource Research Center, Beijing Institute of Clinical Pharmacy, Beijing, China
| | - Guangzhao Cao
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing, China
| | - Weifeng Hong
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing, China
| | - Yuebao Yao
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing, China
| | - Huiqin Zou
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing, China
| | - Yonghong Yan
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing, China
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Phan T, Rowland R, Ponticorvo A, Le BC, Sharif SA, Kennedy GT, Wilson RH, Durkin AJ. Quantifying the confounding effect of pigmentation on measured skin tissue optical properties: a comparison of colorimetry with spatial frequency domain imaging. J Biomed Opt 2022; 27:JBO-210337GR. [PMID: 35324096 PMCID: PMC8942554 DOI: 10.1117/1.jbo.27.3.036002] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/27/2021] [Accepted: 02/16/2022] [Indexed: 05/20/2023]
Abstract
SIGNIFICANCE Spatial frequency domain imaging (SFDI) is a wide-field diffuse optical imaging technique for separately quantifying tissue reduced scattering (μs ' ) and absorption (μa) coefficients at multiple wavelengths, providing wide potential utility for clinical applications such as burn wound characterization and cancer detection. However, measured μs ' and μa can be confounded by absorption from melanin in patients with highly pigmented skin. This issue arises because epidermal melanin is highly absorbing for visible wavelengths and standard homogeneous light-tissue interaction models do not properly account for this complexity. Tristimulus colorimetry (which quantifies pigmentation using the L * "lightness" parameter) can provide a point of comparison between μa, μs ' , and skin pigmentation. AIM We systematically compare SFDI and colorimetry parameters to quantify confounding effects of pigmentation on measured skin μs ' and μa. We assess the correlation between SFDI and colorimetry parameters as a function of wavelength. APPROACH μs ' and μa from the palm and ventral forearm were measured for 15 healthy subjects with a wide range of skin pigmentation levels (Fitzpatrick types I to VI) using a Reflect RS® (Modulim, Inc., Irvine, California) SFDI instrument (eight wavelengths, 471 to 851 nm). L * was measured using a Chroma Meter CR-400 (Konica Minolta Sensing, Inc., Tokyo). Linear correlation coefficients were calculated between L * and μs ' and between L * and μa at all wavelengths. RESULTS For the ventral forearm, strong linear correlations between measured L * and μs ' values were observed at shorter wavelengths (R > 0.92 at ≤659 nm), where absorption from melanin confounded the measured μs ' . These correlations were weaker for the palm (R < 0.59 at ≤659 nm), which has less melanin than the forearm. Similar relationships were observed between L * and μa. CONCLUSIONS We quantified the effects of epidermal melanin on skin μs ' and μa measured with SFDI. This information may help characterize and correct pigmentation-related inaccuracies in SFDI skin measurements.
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Affiliation(s)
- Thinh Phan
- University of California, Irvine, Beckman Laser Institute and Medical Clinic, Irvine, California, United States
| | - Rebecca Rowland
- University of California, Irvine, Beckman Laser Institute and Medical Clinic, Irvine, California, United States
| | - Adrien Ponticorvo
- University of California, Irvine, Beckman Laser Institute and Medical Clinic, Irvine, California, United States
| | - Binh Cong Le
- University of California, Irvine, Beckman Laser Institute and Medical Clinic, Irvine, California, United States
| | - Seyed A. Sharif
- University of California, Irvine, Beckman Laser Institute and Medical Clinic, Irvine, California, United States
| | - Gordon T. Kennedy
- University of California, Irvine, Beckman Laser Institute and Medical Clinic, Irvine, California, United States
| | - Robert H. Wilson
- University of California, Irvine, Beckman Laser Institute and Medical Clinic, Irvine, California, United States
- University of California, Irvine, Department of Medicine, Irvine, California, United States
- University of California, Irvine, Health Policy Research Institute, Irvine, California, United States
- Address all correspondence to Anthony J. Durkin, ; Robert H. Wilson,
| | - Anthony J. Durkin
- University of California, Irvine, Beckman Laser Institute and Medical Clinic, Irvine, California, United States
- University of California, Irvine, Department of Biomedical Engineering, Irvine, California, United States
- Address all correspondence to Anthony J. Durkin, ; Robert H. Wilson,
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Milovanovic B, Djekic I, Miocinovic J, Djordjevic V, Lorenzo JM, Barba FJ, Mörlein D, Tomasevic I. What Is the Color of Milk and Dairy Products and How Is It Measured? Foods 2020; 9:foods9111629. [PMID: 33171601 PMCID: PMC7695135 DOI: 10.3390/foods9111629] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [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: 10/11/2020] [Revised: 10/30/2020] [Accepted: 11/04/2020] [Indexed: 11/16/2022] Open
Abstract
Exactly six-hundred (600) scientific articles that report milk and milk products’ color results in scientific journals in the last couple of decades were reviewed. Thereof, the greatest part of the articles derived from Europe (36.3%) and Asia (29.5%). The greatest share of researchers used Minolta colorimeters (58.8%), while 26.3% of them used Hunter devices. Most reports were on cheese (31.0%) followed by fermented products (21.2%). Moreover, the highest number of papers reported color data of milk and milk products made from cow’s milk (44.81%). As expected, goat’s cheese was the brightest (L* = 87.1), while cow’s cheese was the yellowest (b* = 17.4). Most importantly, it appeared that color research results reported were often impossible to replicate or to interpret properly because of incomplete description of the methodology. In some of the manuscripts reviewed, illuminant source (61.0%), aperture size (93.8%), observer angle, and number of readings (over 70% of all cases) were not reported. It is therefore critical to set rules regarding the description of the methodology for (milk) color research articles in order to ensure replicability and/or comparison of studies.
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Affiliation(s)
- Bojana Milovanovic
- Faculty of Agriculture, University of Belgrade, Nemanjina 6, 11080 Belgrade, Serbia; (I.D.); (J.M.); (I.T.)
- Correspondence:
| | - Ilija Djekic
- Faculty of Agriculture, University of Belgrade, Nemanjina 6, 11080 Belgrade, Serbia; (I.D.); (J.M.); (I.T.)
| | - Jelena Miocinovic
- Faculty of Agriculture, University of Belgrade, Nemanjina 6, 11080 Belgrade, Serbia; (I.D.); (J.M.); (I.T.)
| | - Vesna Djordjevic
- Institute of Meat Hygiene and Technology, Kaćanskog 13, 11000 Belgrade, Serbia;
| | - Jose M. Lorenzo
- Centro Tecnológico de la Carne de Galicia, Parque Tecnológico de Galicia, 32900 San Cibrao das Viñas, Ourense, Spain;
| | - Francisco J. Barba
- Preventive Medicine and Public Health, Food Sciences, Toxicology and Forensic Medicine Department, Faculty of Pharmacy, University of Valencia, 46100 Burjassot, Valencia, Spain;
| | - Daniel Mörlein
- Department of Animal Sciences, University of Göttingen, D-37075 Göttingen, Germany;
| | - Igor Tomasevic
- Faculty of Agriculture, University of Belgrade, Nemanjina 6, 11080 Belgrade, Serbia; (I.D.); (J.M.); (I.T.)
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Korkut B, Tagtekin D, Murat N, Yanikoglu F. Clinical Quantitative Evaluation of Tooth Wear: A 4-year Longitudinal Study. Oral Health Prev Dent 2020; 18:719-729. [PMID: 32895655 DOI: 10.3290/j.ohpd.a45075] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
PURPOSE This study investigated the progression of incisal tooth wear clinically for 4-years, using various diagnostic methods. Effectiveness of occlusal splints (night guards) for patients with nocturnal bruxism was also evaluated. MATERIALS AND METHODS Forty maxillary incisors from 10 patients with nocturnal bruxism were selected. Group 1 (n=5) wore occlusal splints for 6 months, whereas group 2 (n=5) didn't. Ultrasound, cast-model analysis (control), digital radiography, FluoreCam and colorimeter were used for measurements. Clinical progression of incisal wear monitored at baseline, 3, 6, 12, 24 and 48 months, respectively. RESULTS Ultrasound, cast-model analysis and FluoreCam readings gradually and statistically significantly decreased during the overall evaluation period for both groups (p<0.001). Regarding colorimeter, statistically significant differences in periodical measurements were observed from 24 months and 12 months, for group 1 and group 2, respectively (p<0.001). There were no statistically significant differences in readings at evaluation periods, between the groups, for ultrasound, digital radiography and cast-model analysis (p≥0.05); however, statistically significant differences were observed for colorimeter at 24 months (p=0.010) and 48 months (p<0.001), and for FluoreCam at 12, 24, 48 months (p<0.001). Annual decrease in mean crown length was determined as 20-30 µm for group 1 and 40-50 µm for group 2. The decreases in mean crown length were statistically significantly lower for group 1 compared to group 2, regarding the assessments for 1 year, 2 years and 4 years (p<0.001). Positive and good correlations were observed between ultrasound, cast-model analysis and FluoreCam measurements (p<0.001). CONCLUSIONS Ultrasound, FluoreCam and colorimeter showed promising results for monitoring any change and progression of incisal tooth wear clinically. Ultrasound might be considered as a quantitative, reliable and repeatable method. Precision of the measurements varied among the diagnostic methods used. Occlusal splints may have a potential preventive effect for progressive tooth wear.
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Wang DH, Chen H, Zhou RY, Huang CX, Gao HX, Fan BL, Liu GJ, Ning ZH. Study of measurement methods on phenotype of translucent eggs. Poult Sci 2020; 98:6677-6683. [PMID: 31579910 PMCID: PMC8913975 DOI: 10.3382/ps/pez539] [Citation(s) in RCA: 3] [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: 05/27/2019] [Accepted: 09/26/2019] [Indexed: 11/23/2022] Open
Abstract
Scoring is a common method to evaluate eggshell translucency, and it mainly depends on the area and the density of translucent spots in eggshells. However, the lack of common scoring criteria and the difficulty of quantitatively measuring spots in eggshells impede effective comparisons between research papers and greatly hinder the progress of research on translucent eggshell. To make measurement of translucent eggshells more objective, we optimized the scoring method and compared it with 2 new methods: grayscale recognition and the colorimeter method. Briefly, a total of 354 eggs from 600, 395-day-old dwarf brown laying hens were collected and classified into 4 score groups according to their degree of translucency. This subjective process was repeated 5 times. Then, we captured the profile side of each egg using a camera and measured spot characteristics using grayscale recognition, which involved measuring the quantity of spots (QS), diameter of each spot (DS), average area of each spot (AAES), sum of spot areas (SUSA), sum of shell area (SUSHA), and ratio of SUSA to SUSHA (RSS) on the eggshell. Furthermore, the L, A, and B values of each egg at the sharp, middle, and blunt ends were separately measured using a colorimeter. As a result, average values of 31.31, 29.78, 29.81, and 9.08% of all eggs were divided into score levels 1, 2, 3, and 4 (from opaque to translucent), which correspond with RSS values of 1.34, 3.23, 6.21, and 11.89%, respectively. By grayscale recognition, QS, DS, AAES, SUSA, SUSHA, and RSS all increased along with increased translucency scores (P < 0.05). Using scoring, an egg with a specific RSS value was more easily assigned to a specific score level (50%) or adjacent score levels (50%). The L, A, and B values of eggshells in score level 1 were significantly different from those of eggshells in levels 3 or 4; however, there were no significant differences between any adjacent score levels. In summary, the present study explored objective reference metrics to measure eggshell translucency.
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Affiliation(s)
- De-He Wang
- Department of Animal Science and Technology, Hebei Agricultural University, Baoding 071001, China
| | - Hui Chen
- Department of Animal Science and Technology, Hebei Agricultural University, Baoding 071001, China
| | - Rong-Yan Zhou
- Department of Animal Science and Technology, Hebei Agricultural University, Baoding 071001, China
| | - Chen-Xuan Huang
- Department of Animal Science and Technology, Hebei Agricultural University, Baoding 071001, China
| | - Hui-Xian Gao
- College of Foreign Languages, Hebei Agricultural University, Baoding 071001, China
| | - Bao-Liang Fan
- Department of Animal Science and Technology, Hebei Agricultural University, Baoding 071001, China
| | - Guo-Jia Liu
- Department of Animal Science and Technology, Hebei Agricultural University, Baoding 071001, China
| | - Zhong-Hua Ning
- National Engineering Laboratory for Animal Breeding and MOA Key Laboratory of Animal Genetics and Breeding, College of Animal Science and Technology, China Agricultural University, Beijing 100193, China
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Duarte DP, Nogueira RN, Bilro L. Turbidity and RI Dependency of a Polymer Optical Fiber-Based Chromatic Sensor. Sensors (Basel) 2019; 20:s20010019. [PMID: 31861502 PMCID: PMC6982724 DOI: 10.3390/s20010019] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2019] [Revised: 12/13/2019] [Accepted: 12/17/2019] [Indexed: 06/07/2023]
Abstract
An in-line and real time chromatic sensor for liquids based on plastic optical fiber was developed. It uses an air gap, fiber to fiber, transmission principle. Its dependency to turbidity and refractive index is studied and characterized. This information will provide the necessary knowledge for future implementation of more complex auto-compensations routines. Due to the predictable behavior of the sensor to variations of turbidity and refractive index, it is shown that a posterior compensation could be applied for the discrimination of color. The real-time color sensor can be used in different turbid liquids and contain different refractive indices.
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Affiliation(s)
- Daniel P. Duarte
- Instituto de Telecomunicações, 3810-193 Aveiro, Portugal;
- Physics Department, Aveiro University, 3810-193 Aveiro, Portugal;
| | | | - Lucia Bilro
- Instituto de Telecomunicações, 3810-193 Aveiro, Portugal;
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Owens BF, Mathew D, Diepenbrock CH, Tiede T, Wu D, Mateos-Hernandez M, Gore MA, Rocheford T. Genome-Wide Association Study and Pathway-Level Analysis of Kernel Color in Maize. G3 (Bethesda) 2019; 9:1945-55. [PMID: 31010822 DOI: 10.1534/g3.119.400040] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Rapid development and adoption of biofortified, provitamin A-dense orange maize (Zea mays L.) varieties could be facilitated by a greater understanding of the natural variation underlying kernel color, including as it relates to carotenoid biosynthesis and retention in maize grain. Greater abundance of carotenoids in maize kernels is generally accompanied by deeper orange color, useful for distinguishing provitamin A-dense varieties to consumers. While kernel color can be scored and selected with high-throughput, low-cost phenotypic methods within breeding selection programs, it remains to be well established as to what would be the logical genetic loci to target for selection for kernel color. We conducted a genome-wide association study of maize kernel color, as determined by colorimetry, in 1,651 yellow and orange inbreds from the Ames maize inbred panel. Associations were found with y1, encoding the first committed step in carotenoid biosynthesis, and with dxs2, which encodes the enzyme responsible for the first committed step in the biosynthesis of the isoprenoid precursors of carotenoids. These genes logically could contribute to overall carotenoid abundance and thus kernel color. The lcyE and zep1 genes, which can affect carotenoid composition, were also found to be associated with colorimeter values. A pathway-level analysis, focused on genes with a priori evidence of involvement in carotenoid biosynthesis and retention, revealed associations for dxs3 and dmes1, involved in isoprenoid biosynthesis; ps1 and vp5, within the core carotenoid pathway; and vp14, involved in cleavage of carotenoids. Collectively, these identified genes appear relevant to the accumulation of kernel color.
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Dall'Oglio F, Lacarrubba F, Luca M, Boscaglia S, Granger C, Micali G. Clinical and instrumental evaluation of a new topical non-corticosteroid antifungal/anti-inflammatory/antiseborrheic combination cream for the treatment of mild-to-moderate facial seborrheic dermatitis. Clin Cosmet Investig Dermatol 2019; 12:103-108. [PMID: 30774406 PMCID: PMC6354683 DOI: 10.2147/ccid.s186621] [Citation(s) in RCA: 4] [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] [Indexed: 11/23/2022]
Abstract
Purpose Topical agents play a key role in the management of facial seborrheic dermatitis (SD) by reducing inflammation and scale production. The aim of this open-label trial was to assess the efficacy and tolerability of a new non-corticosteroid, antifungal/anti-inflammatory/antiseborrheic cream containing piroctone olamine, stearyl glycyrrhetinate, and zinc PCA in the treatment of facial SD using clinical and instrumental evaluation. Patients and methods Twenty adult subjects affected by mild-to-moderate inflamed facial SD were enrolled and instructed to apply the study cream twice daily for 60 days. Efficacy was evaluated at baseline, and at days 15, 30, and 60 by measuring the grade of desquamation, erythema, and pruritus using clinical evaluation, erythema-directed digital photography, colorimetry, and subject-completed Visual Analog Scale. Additionally, an Investigator Global Assessment (IGA) was assessed using a 5-point scale: excellent response (>80% improvement); good response (50%-80% improvement); mild response (<50% improvement); no response (no change); worsening. Results After 15 days, a statistically significant decrease from baseline was found in desquamation, erythema, colorimetric scores, and pruritus. At day 60, a significant further improvement for all evaluated parameters was recorded. Moreover, the IGA improved in 90% of patients, with an excellent response in 53% of cases. A good correlation was found between clinical and instrumental evaluations. Conclusion Our results indicate that the study facial cream represents an option to consider when dealing with mild-to-moderate SD, being effective, well-tolerated, and free of significant side effects, as confirmed by clinical and instrumental evaluation.
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Affiliation(s)
| | | | - Maria Luca
- Dermatology Clinic, University of Catania, Catania, Italy,
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Wu C, Ma YC, Xu L, Li RQ, Chao ZM. [Analysis of factors related to oil-spilling and establishment of limit standards of Asparagi Radix]. Zhongguo Zhong Yao Za Zhi 2019; 44:106-111. [PMID: 30868820 DOI: 10.19540/j.cnki.cjcmm.2019.0003] [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] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Some samples of Asparagi Radix were collected from medical markets.Colors of Asparagi Radix were observed by human vision and recorded to judge whether samples were degenerative.Water content of Asparagi Radix was determined by a drying method.The chroma value and color difference were determined and calculated by a colorimeter.With the deepening of color,the L*value was decreased and a*and ΔE*values were increased.It showed that the results determined by colorimeter can replace the results of visual observation.An HPLC method was established and used to determine the contents of 5-hydroxymethylfurfural(5-HMF) in Asparagi Radix.The results showed the 5-HMF contents were from 0.002 255 to 0.049 14 mg·g-1 in some samples with yellowish-white or yellowish-brown color,significantly increased from 0.080 80 to 0.105 1 mg·g-1 in some samples with brown color,and up to 1.033 mg·g-1 in an oil-spilling sample with dark brown color.This result demonstrated that the 5-HMF contents were significantly increased by accompanied with the deepening of color.There were the significant negatively correlation between the 5-HMF content and the L*value(P<0.01) and positively correlation between the 5-HMF content and the a*or ΔE*value(P<0.01) by the spearman analysis.The oil-spilling and qualified samples were clustered into two alone categories by the cluster analysis.That the limited standards of the 5-HMF content is not higher than 0.02% by HPLC method and of the L*value is not less than 50 by colorimeter method were suggested for Asparagi Radix.It is firstly reported the multiple-factor analysis about oil-spilling and discoloration and the establishment of limited standard of Asparagi Radix.
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Affiliation(s)
- Cui Wu
- Institute of Chinese Materia Medica,China Academy of Chinese Medical Sciences Beijing 100700,China
| | - Yu-Cui Ma
- Institute of Chinese Materia Medica,China Academy of Chinese Medical Sciences Beijing 100700,China
| | - Liang Xu
- Institute of Chinese Materia Medica,China Academy of Chinese Medical Sciences Beijing 100700,China
| | - Rui-Qi Li
- Institute of Chinese Materia Medica,China Academy of Chinese Medical Sciences Beijing 100700,China
| | - Zhi-Mao Chao
- Institute of Chinese Materia Medica,China Academy of Chinese Medical Sciences Beijing 100700,China
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Farzanegan F, Ameri H, Miri Soleiman I, Khodaverdi E, Rangrazi A. An In Vitro Study on the Effect of Amorphous Calcium Phosphate and Fluoride Solutions on Color Improvement of White Spot Lesions. Dent J (Basel) 2018; 6:E24. [PMID: 29932119 DOI: 10.3390/dj6030024] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2018] [Revised: 06/05/2018] [Accepted: 06/12/2018] [Indexed: 11/25/2022] Open
Abstract
The ability of remineralizing agents to improve the color of white spot lesions (WSL) is an important aspect that should be investigated. The aim of this study was to evaluate the effects of 0.05% amorphous calcium phosphate (ACP), 0.5% ACP, and 0.05% fluoride solutions, as well as artificial saliva on the color improvement of white spot lesions (WSLs). In this in vitro study, 50 human premolar teeth were randomly classified into five groups. At baseline, all the samples were assessed by using a colorimeter (E0). Then, white spot lesions were induced on the surface of the teeth by means of a pH-cycling model, and the colorimeter was used again (E1). Afterwards, samples of the 1st and 2nd groups were kept in 0.05% ACP and 0.5% ACP solutions for 1 min/day, respectively. The 3rd group specimens were placed in 0.05% fluoride solution for 1 min/day. The other two groups were kept in artificial saliva and distilled in water separately. All the samples were assessed by the colorimeter for a third time (E2). We found no significant difference between the groups in ∆E1. There was also no significant difference among 0.05% ACP solution, 0.5% ACP solution, 0.05% fluoride solution, and artificial saliva considering ∆E2. However, a significant difference was noted between the above-mentioned solutions and distilled water in ∆E2. With respect to ∆E3, there were considerable differences between ACP solution and artificial saliva. The same results were obtained for the difference between fluoride solution and artificial saliva. However, no significant difference was found among 0.05% ACP, 0.5% ACP, and 0.05% fluoride solutions in terms of ∆E3. In Conclusion, ACP is as effective as fluoride in the color improvement of WSLs and the recommended treatment for this purpose is daily use of 0.05% ACP, 0.5% ACP or 0.05% fluoride solutions.
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Gong JT, Zhao LY, Rudolf B, Mi WJ, Li Y, Li JH, Ren ZY, Xu D, Zhao T, Yan YH. [Rancidness of Armeniacae Semen Amarum involving Bianzhuang Lunzhi]. Zhongguo Zhong Yao Za Zhi 2016; 41:4375-81. [PMID: 28933115 DOI: 10.4268/cjcmm20162314] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2016] [Indexed: 11/17/2022]
Abstract
This article aims to compare the qualities of Armeniacae Semen Amarum before and after rancidness, in order to study the rancidness of Armeniacae Semen Amarum. In the experiment, content of fatty oil, acid value and peroxide value were determined before and after rancidness,respectively. Meanwhile, HPLC, GC-MS were utilized to analyze laetrile and fatty acid components. Besides, colorimeter and e-nose were introduced to quantify and compare "color and odor". A correlation analysis was conducted on the above results. The results showed that color of post-rancidness Armeniacae Semen Amarum changed from yellow to brown, with sour and lower content of laetrile. On the contrary, acid and peroxide values increased significantly, with changes in fatty acid component. There was a considerable correlation between appearance characteristics and changes in internal quality. The "sensory analysis-quality identification system" can provide a certain scientific basis for prediction of the content of chemical components in traditional Chinese medicine, preliminary judgment of quality of traditional Chinese medicine and real-time quality monitoring, which offers us novel ideas and reference for storage principles of traditional Chinese medicines of "pre-event prediction, during-event intervention and post-event identification".
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Yan JC, Chen Y, Pang Y, Slavik J, Zhao YF, Wu XM, Yang Y, Yang SF, Ren TL. A Miniaturized Colorimeter with a Novel Design and High Precision for Photometric Detection. Sensors (Basel) 2018; 18:E818. [PMID: 29518059 DOI: 10.3390/s18030818] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Water quality detection plays an increasingly important role in environmental protection. In this work, a novel colorimeter based on the Beer-Lambert law was designed for chemical element detection in water with high precision and miniaturized structure. As an example, the colorimeter can detect phosphorus, which was accomplished in this article to evaluate the performance. Simultaneously, a modified algorithm was applied to extend the linear measurable range. The colorimeter encompassed a near infrared laser source, a microflow cell based on microfluidic technology and a light-sensitive detector, then Micro-Electro-Mechanical System (MEMS) processing technology was used to form a stable integrated structure. Experiments were performed based on the ammonium molybdate spectrophotometric method, including the preparation of phosphorus standard solution, reducing agent, chromogenic agent and color reaction. The device can obtain a wide linear response range (0.05 mg/L up to 7.60 mg/L), a wide reliable measuring range up to 10.16 mg/L after using a novel algorithm, and a low limit of detection (0.02 mg/L). The size of flow cell in this design is 18 mm × 2.0 mm × 800 μm, obtaining a low reagent consumption of 0.004 mg ascorbic acid and 0.011 mg ammonium molybdate per determination. Achieving these advantages of miniaturized volume, high precision and low cost, the design can also be used in automated in situ detection.
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18
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Yoon HI, Bae JW, Park JM, Chun YS, Kim MA, Kim M. A Study on Possibility of Clinical Application for Color Measurements of Shade Guides Using an Intraoral Digital Scanner. J Prosthodont 2016; 27:670-675. [PMID: 29377326 DOI: 10.1111/jopr.12559] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/15/2016] [Indexed: 11/26/2022] Open
Abstract
PURPOSE To assess if color measurement with intraoral scanner correlates with digital colorimeter and to evaluate the possibility of application of a digital scanner for shade selection. MATERIALS AND METHODS The L*a*b* values of the five shade tabs (A1, A2, A3, A3.5, and A4) were obtained with an intraoral scanner (TRIOS Pod) and a colorimeter (ShadeEye). Both devices were calibrated according to the manufacturer's instructions before measurements. Color measurement values were compared with paired t-test, and a Pearson's correlation analysis was performed to evaluate the relationship of two methods. RESULTS The L*a*b* values of the colorimeter were significantly different from those of the digital scanner (p < 0.001). The L* and b* values of both methods were strongly correlated with each other (both p < 0.05). The device repeatability in both methods were reported to be excellent (p < 0.05). Within the limitations of this study, color measurements with digital intraoral scanners and computer-assisted image analysis were in accordance with those of the colorimeter with respect to L* and b* values; however, all the coordinates of shade tabs were significantly different between two methods. CONCLUSIONS The digital intraoral scanner may not be used as the primary method of color selection in clinical practices, considering significant differences in color parameters with colorimeter. The scanner's capability in shade selection should be further evaluated.
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Affiliation(s)
- Hyung-In Yoon
- Department of Prosthodontics, Seoul National University School of Dentistry, Seoul, Korea
| | - Ji-Won Bae
- Department of Clinical Oral Health Science, Graduate School of Clinical Dentistry, Ewha Womans University, Seoul, Korea
| | - Ji-Man Park
- Department of Prosthodontics, Seoul National University Gwanak Dental Hospital, Seoul, Korea
| | - Youn-Sic Chun
- Division of Orthodontics, Department of Dentistry, School of Medicine, Ewha Womans University, Seoul, Korea
| | - Mi-Ae Kim
- Division of Pediatric Dentistry, Department of Dentistry, School of Medicine, Ewha Womans University, Seoul, Korea
| | - Minji Kim
- Division of Orthodontics, Department of Dentistry, School of Medicine, Ewha Womans University, Seoul, Korea
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Priftis A, Stagos D, Tzioumakis N, Konstantinopoulos K, Patouna A, Papadopoulos GE, Tsatsakis A, Kouretas D. Development and Validation of a Kit to Measure Drink Antioxidant Capacity Using a Novel Colorimeter. Molecules 2016; 21:molecules21091154. [PMID: 27589706 PMCID: PMC6273567 DOI: 10.3390/molecules21091154] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/13/2016] [Revised: 08/26/2016] [Accepted: 08/27/2016] [Indexed: 01/11/2023]
Abstract
Measuring the antioxidant capacity of foods is essential, as a means of quality control to ensure that the final product reaching the consumer will be of high standards. Despite the already existing assays with which the antioxidant activity is estimated, new, faster and low cost methods are always sought. Therefore, we have developed a novel colorimeter and combined it with a slightly modified DPPH assay, thus creating a kit that can assess the antioxidant capacity of liquids (e.g., different types of coffee, beer, wine, juices) in a quite fast and low cost manner. The accuracy of the colorimeter was ensured by comparing it to a fully validated Hitachi U-1900 spectrophotometer, and a coefficient was calculated to eliminate the observed differences. In addition, a new, user friendly software was developed, in order to render the procedure as easy as possible, while allowing a central monitoring of the obtained results. Overall, a novel kit was developed, with which the antioxidant activity of liquids can be measured, firstly to ensure their quality and secondly to assess the amount of antioxidants consumed with the respective food.
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Affiliation(s)
- Alexandros Priftis
- Department of Biochemistry and Biotechnology, University of Thessaly, Larissa 41221, Greece.
| | - Dimitrios Stagos
- Department of Biochemistry and Biotechnology, University of Thessaly, Larissa 41221, Greece.
| | | | | | - Anastasia Patouna
- Department of Agricultural Engineering Technologists, TEI of Thessaly, Larissa 41110, Greece.
| | - Georgios E Papadopoulos
- Department of Biochemistry and Biotechnology, University of Thessaly, Larissa 41221, Greece.
| | - Aristides Tsatsakis
- Department of Forensic Sciences and Toxicology, Medical School, University of Crete, Heraklion 71003, Greece.
| | - Dimitrios Kouretas
- Department of Biochemistry and Biotechnology, University of Thessaly, Larissa 41221, Greece.
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Liu RT, Tao LQ, Liu B, Tian XG, Mohammad MA, Yang Y, Ren TL. A Miniaturized On-Chip Colorimeter for Detecting NPK Elements. Sensors (Basel) 2016; 16:s16081234. [PMID: 27527177 PMCID: PMC5017399 DOI: 10.3390/s16081234] [Citation(s) in RCA: 10] [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] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/07/2016] [Revised: 07/19/2016] [Accepted: 08/02/2016] [Indexed: 01/19/2023]
Abstract
Recently, precision agriculture has become a globally attractive topic. As one of the most important factors, the soil nutrients play an important role in estimating the development of precision agriculture. Detecting the content of nitrogen, phosphorus and potassium (NPK) elements more efficiently is one of the key issues. In this paper, a novel chip-level colorimeter was fabricated to detect the NPK elements for the first time. A light source–microchannel photodetector in a sandwich structure was designed to realize on-chip detection. Compared with a commercial colorimeter, all key parts are based on MEMS (Micro-Electro-Mechanical System) technology so that the volume of this on-chip colorimeter can be minimized. Besides, less error and high precision are achieved. The cost of this colorimeter is two orders of magnitude less than that of a commercial one. All these advantages enable a low-cost and high-precision sensing operation in a monitoring network. The colorimeter developed herein has bright prospects for environmental and biological applications.
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Affiliation(s)
- Rui-Tao Liu
- Institute of Microelectronics, Tsinghua University, Beijing 100084, China.
- Tsinghua National Laboratory for Information Science and Technology (TNList), Tsinghua University, Beijing 100084, China.
| | - Lu-Qi Tao
- Institute of Microelectronics, Tsinghua University, Beijing 100084, China.
- Tsinghua National Laboratory for Information Science and Technology (TNList), Tsinghua University, Beijing 100084, China.
| | - Bo Liu
- Institute of Microelectronics, Tsinghua University, Beijing 100084, China.
- Tsinghua National Laboratory for Information Science and Technology (TNList), Tsinghua University, Beijing 100084, China.
| | - Xiang-Guang Tian
- Institute of Microelectronics, Tsinghua University, Beijing 100084, China.
- Tsinghua National Laboratory for Information Science and Technology (TNList), Tsinghua University, Beijing 100084, China.
| | - Mohammad Ali Mohammad
- Institute of Microelectronics, Tsinghua University, Beijing 100084, China.
- School of Chemical and Materials Engineering (SCME), National University of Sciences and Technology (NUST), Sector H-12, Islamabad 44000, Pakistan.
| | - Yi Yang
- Institute of Microelectronics, Tsinghua University, Beijing 100084, China.
- Tsinghua National Laboratory for Information Science and Technology (TNList), Tsinghua University, Beijing 100084, China.
| | - Tian-Ling Ren
- Institute of Microelectronics, Tsinghua University, Beijing 100084, China.
- Tsinghua National Laboratory for Information Science and Technology (TNList), Tsinghua University, Beijing 100084, China.
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Wright CY, Wilkes M, du Plessis JL, Reeder AI, Albers PN. In multiple situational light settings, visual observation for skin colour assessment is comparable with colorimeter measurement. Skin Res Technol 2015; 22:305-10. [PMID: 26346825 DOI: 10.1111/srt.12261] [Citation(s) in RCA: 3] [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] [Accepted: 07/29/2015] [Indexed: 11/28/2022]
Abstract
BACKGROUND Finding inexpensive and reliable techniques for assessing skin colour is important, given that it is related to several adverse human health outcomes. Visual observation is considered a subjective approach assessment and, even when made by trained assessor, concern has been raised about the need for controlled lighting in the study venue. The aim of this study is to determine whether visual skin colour assessments correlate with objective skin colour measurements in study venues with different lighting types and configurations. METHODS Two trained investigators, with confirmed visual acuity, visually classified the inner, upper arm skin colour of 556 adults using Munsell(®) colour classifications converted to Individual Typology Angle (°ITA) values based on published data. Skin colour at the same anatomic site was also measured using a colorimeter. Each participant was assessed in one of 10 different buildings, each with a different study day. Munsell(®) -derived °ITA values were compared to colorimeter °ITA values for the full sample and by building/day. RESULTS We found a strong positive, monotonic correlation between Munsell(®) derived °ITA values and colorimeter °ITA values for all participants (Spearman ρ = 0.8585, P < 0.001). Similar relationships were found when Munsell(®) and colorimeter °ITA values were compared for participants assessed in the same building for all 10 buildings (Spearman ρ values ranged from 0.797 to 0.934, all correlations were statistically significant at P < 0.001). CONCLUSION It is possible to visually assess individual skin colour in multiple situational lighting settings and retrieve results that are comparable with objective measurements of skin colour. This was true for individuals of varying population groups and skin pigmentation.
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Affiliation(s)
- C Y Wright
- Environment & Health Research Unit, South African Medical Research Council, Department of Geography, Meteorology and Geoinformatics, University of Pretoria, Pretoria, South Africa
| | - M Wilkes
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, NY, USA
| | - J L du Plessis
- Occupational Hygiene and Health Research Initiative, North-West University, Potchefstroom, South Africa
| | - A I Reeder
- Cancer Society of New Zealand Social and Behavioural Research Unit, Department of Preventive and Social Medicine, University of Otago Medical School, Dunedin, New Zealand
| | - P N Albers
- Environment & Health Research Unit, South African Medical Research Council, Pretoria, South Africa
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Malingappa P, Yarradoddappa V. A Continuous Flow System for the Measurement of Ambient Nitrogen Oxides [NO + NO2] Using Rhodamine B Hydrazide as a Chemosensor. Anal Chem Insights 2014; 9:67-73. [PMID: 25210422 PMCID: PMC4149333 DOI: 10.4137/aci.s16890] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/12/2014] [Revised: 06/26/2014] [Accepted: 07/05/2014] [Indexed: 11/13/2022]
Abstract
A new chemosensor has been used to monitor atmospheric nitrogen oxides [NO + NO2] at parts per billion (ppb) level. It is based on the catalytic reaction of nitrogen oxides with rhodamine B hydrazide (RBH) to produce a colored compound through the hydrolysis of the amide bond of the molecule. A simple colorimeter has been used to monitor atmospheric nitrogen dioxide at ppb level. The air samples were purged through a sampling cuvette containing RBH solution using peristaltic pump. The proposed method has been successfully applied to monitor the ambient nitrogen dioxide levels at traffic junction points within the city limits and the results obtained are compared with the standard Griess-Ilosvay method.
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Affiliation(s)
- Pandurangappa Malingappa
- Department of Studies in Chemistry, Central College Campus, Bangalore University, Bangalore-560001, India
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