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Yue X, Chen Z, Zhang J, Huang C, Zhao S, Li X, Qu Y, Zhang C. Extraction, purification, structural features and biological activities of longan fruit pulp (Longyan) polysaccharides: A review. Front Nutr 2022; 9:914679. [PMID: 35958258 PMCID: PMC9358249 DOI: 10.3389/fnut.2022.914679] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2022] [Accepted: 07/04/2022] [Indexed: 11/29/2022] Open
Abstract
Dimocarpus longan Lour. (also called as longan) is a subtropical and tropical evergreen tree belonging to the Sapindaceae family and is widely distributed in China, Southeast Asia and South Asia. The pulp of longan fruit is a time-honored traditional medicinal and edible raw material in China and some Asian countries. With the advancement of food therapy in modern medicine, longan fruit pulp as an edible medicinal material is expected to usher in its rapid development as a functional nutrient. As one of the main constituents of longan fruit pulp, longan fruit pulp polysaccharides (LPs) play an indispensable role in longan fruit pulp-based functional utilization. This review aims to outline the extraction and purification methods, structural characteristics and biological activities (such as immunoregulatory, anti-tumor, prebiotic, anti-oxidant, anti-inflammatory and inhibition of AChE activity) of LPs. Besides, the structure-activity relationship, application prospect and patent application of LPs were analyzed and summarized. Through the systematic summary, this review attempts to provide a theoretical basis for further research of LPs, and promote the industrial development of this class of polysaccharides.
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Affiliation(s)
- Xuan Yue
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Zhejie Chen
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macau, China
| | - Jinming Zhang
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Chi Huang
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Shiyi Zhao
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Xuebo Li
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Yan Qu
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Chen Zhang
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, China
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Gao S, Yan S, Zhou Y, Feng Y, Xie X, Guo W, Shen Q, Chen C. Optimisation of enzyme-assisted extraction of Erythronium sibiricum bulb polysaccharide and its effects on immunomodulation. Glycoconj J 2022; 39:357-368. [PMID: 35138526 DOI: 10.1007/s10719-021-10038-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2021] [Revised: 12/22/2021] [Accepted: 12/29/2021] [Indexed: 12/01/2022]
Abstract
In this study, polysaccharides of Erythronium sibiricum bulb were extracted using enzyme-assisted extraction technology and then optimised by response surface methodology. The characteristics and immunomodulatory activities of the polysaccharide (E1P) were investigated. Setting the yield of polysaccharides as the index, the effects of amylase content, zymolytic time, extraction pH and zymolytic temperature were investigated. The optimal extraction conditions for polysaccharides were as follows: amylase content, 1% weight of pre-treated powder; zymolytic time, 2 h; extraction pH, 7.5; and zymolytic temperature, 55 °C. The yield was predicted to be 61.10%, which agreed with the value obtained in confirmatory experiments (59.71% ± 2.72%). Further research indicated that the primary component of E1P is glucose; however, it also contains a small quantity of galactose and arabinose. In vitro assays showed that E1P and ESBP (another kind of E. sibiricum bulb polysaccharide extracted by water decoction in our previous study) could significantly promote the cellular viability and phagocytosis of RAW264.7 cells without cytotoxicity. Moreover, they could enhance the ability to secrete nitric oxide and cytokines such as TNF-α and IL-1β. However, the immunomodulatory activities of E1P were better than those of ESBP. According to the results of this study, enzyme-assisted extraction represents a new strategy for extracting E. sibiricum bulb polysaccharides with higher yield and better immune activity.
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Affiliation(s)
- Shanshan Gao
- Pharmacy College, Xinjiang Medical University, Urumqi, 830011, Xinjiang, China
| | - Shujing Yan
- Pharmacy College, Xinjiang Medical University, Urumqi, 830011, Xinjiang, China
| | - Yue Zhou
- Pharmacy College, Xinjiang Medical University, Urumqi, 830011, Xinjiang, China
| | - Yue Feng
- Urumqi Customs District P.R. China, Urumqi, 830011, Xinjiang, China
| | - Xiangyun Xie
- Pharmacy College, Xinjiang Medical University, Urumqi, 830011, Xinjiang, China
| | - Wei Guo
- Pharmacy College, Xinjiang Medical University, Urumqi, 830011, Xinjiang, China
| | - Qi Shen
- Pharmacy College, Xinjiang Medical University, Urumqi, 830011, Xinjiang, China
| | - Chunli Chen
- Pharmacy College, Xinjiang Medical University, Urumqi, 830011, Xinjiang, China.
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Krakowska-Sieprawska A, Rafińska K, Walczak-Skierska J, Kiełbasa A, Buszewski B. Promising Green Technology in Obtaining Functional Plant Preparations: Combined Enzyme-Assisted Supercritical Fluid Extraction of Flavonoids Isolation from Medicago Sativa Leaves. MATERIALS (BASEL, SWITZERLAND) 2021; 14:2724. [PMID: 34064166 PMCID: PMC8196795 DOI: 10.3390/ma14112724] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/20/2021] [Revised: 05/14/2021] [Accepted: 05/20/2021] [Indexed: 11/17/2022]
Abstract
To elaborate a complete extraction protocol for the enhanced release of biologically active compounds from plant cells, this study aimed to optimize together the parameters of the supercritical fluid extraction (SFE) process (temperature, pressure, and percentage of cosolvent) and enzymatic treatment of plant material (pH, enzyme concentration, time, and temperature) by response surface methodology (RSM). Medicago sativa L. was selected as a plant material due to its richness in phenolics and flavonoids. HPLC-MS/MS analysis allowed evaluating the content of individual bioactive compounds in obtained extracts. The total content of polyphenolic compounds in the extract obtained after two-step optimization was much higher (546 ± 21 µg/g) than in the extract obtained from non-hydrolyzed material (275 ± 23 µg/g) and in the extract obtained by maceration (162 ± 20 µg/g). Furthermore, it was evidenced that extract with the highest content of polyphenolic compounds can support the cellular antioxidant system both as a free radical scavenger and by stimulating the antioxidant enzyme system.
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Affiliation(s)
- Aneta Krakowska-Sieprawska
- Department of Environmental Chemistry and Bioanalytics, Faculty of Chemistry, Nicolaus Copernicus University, Gagarina 7 St., PL-87100 Torun, Poland; (A.K.-S.); (K.R.); (A.K.)
- Interdisciplinary Centre of Modern Technologies, Nicolaus Copernicus University, Wilenska 4 St., PL-87100 Torun, Poland;
| | - Katarzyna Rafińska
- Department of Environmental Chemistry and Bioanalytics, Faculty of Chemistry, Nicolaus Copernicus University, Gagarina 7 St., PL-87100 Torun, Poland; (A.K.-S.); (K.R.); (A.K.)
- Interdisciplinary Centre of Modern Technologies, Nicolaus Copernicus University, Wilenska 4 St., PL-87100 Torun, Poland;
| | - Justyna Walczak-Skierska
- Interdisciplinary Centre of Modern Technologies, Nicolaus Copernicus University, Wilenska 4 St., PL-87100 Torun, Poland;
| | - Anna Kiełbasa
- Department of Environmental Chemistry and Bioanalytics, Faculty of Chemistry, Nicolaus Copernicus University, Gagarina 7 St., PL-87100 Torun, Poland; (A.K.-S.); (K.R.); (A.K.)
| | - Bogusław Buszewski
- Department of Environmental Chemistry and Bioanalytics, Faculty of Chemistry, Nicolaus Copernicus University, Gagarina 7 St., PL-87100 Torun, Poland; (A.K.-S.); (K.R.); (A.K.)
- Interdisciplinary Centre of Modern Technologies, Nicolaus Copernicus University, Wilenska 4 St., PL-87100 Torun, Poland;
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Li Q, Yang F, Hou R, Huang T, Hao Z. Post-screening characterization of an acidic polysaccharide from Echinacea purpurea with potent anti-inflammatory properties in vivo. Food Funct 2021; 11:7576-7583. [PMID: 32821898 DOI: 10.1039/d0fo01367f] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
We extracted and purified three polysaccharides from Echinacea purpurea using pectinase-assisted extraction to obtain crude preparations and optimized the method using an orthogonal analysis. We obtained three polysaccharide fractions (EPPS-1, -2 and -3) using DEAE ion exchange and gel filtration chromatography. The homogeneity of the fractions was confirmed using high performance gel permeation chromatography. EPPS-3 administered to mice in a LPS-induced septicemia model effectively counteracted the effects of LPS resulting in significantly less lung damage. This trend was also seen in the serum and lung cytokine levels where EPPS-3 significantly decreased the levels of TNF-α and IL-6 and increased IL-10. Particularly, we fully characterized the structure of the EPPS-3 polysaccharide using a series of technologies. This polysaccharide structure was mainly composed of →4)-α-Glcp-(1→, →4)-α-Galp-(1→, T-α-Araf-(1→, →3,4)-β-GalpA-(1→ glycosidic linkages at a certain proportion. In sum, EPPS-3, with a clear structure, has potent anti-inflammatory activities and is a candidate for further development as an anti-inflammatory agent for clinical development.
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Affiliation(s)
- Qiu Li
- College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao 266109, China
| | - Fenfang Yang
- College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao 266109, China
| | - Ranran Hou
- College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao 266109, China
| | - Tingting Huang
- College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao 266109, China
| | - Zhihui Hao
- College of Veterinary Medicine, China Agricultural University, Beijing, China.
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Lyu F, Xu X, Zhang L. Natural polysaccharides with different conformations: extraction, structure and anti-tumor activity. J Mater Chem B 2020; 8:9652-9667. [DOI: 10.1039/d0tb01713b] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Natural polysaccharides as sustainable polymers are rich sources with good biological safety and various biological functions, which are important research topics in the fields of food and medicine.
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Affiliation(s)
- Fengzhi Lyu
- College of Chemistry and Molecular Sciences
- Wuhan 430072
- China
| | - Xiaojuan Xu
- College of Chemistry and Molecular Sciences
- Wuhan 430072
- China
| | - Lina Zhang
- College of Chemistry and Molecular Sciences
- Wuhan 430072
- China
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Gurpilhares DDB, Cinelli LP, Simas NK, Pessoa A, Sette LD. Marine prebiotics: Polysaccharides and oligosaccharides obtained by using microbial enzymes. Food Chem 2019; 280:175-186. [PMID: 30642484 DOI: 10.1016/j.foodchem.2018.12.023] [Citation(s) in RCA: 69] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2018] [Revised: 11/12/2018] [Accepted: 12/04/2018] [Indexed: 02/07/2023]
Abstract
Utilization of marine algae has increased considerably over the past decades, since biodiversity within brown, red and green marine algae offers possibilities of finding a variety of bioactive compounds. Marine algae are rich sources of dietary fibre. The remarkable positive effects of seaweed dietary fibre on human body are related to their prebiotic activity over the gastrointestinal tract (GIT) microbiota. However, dietary modulation of microorganisms present in GIT can be influenced by different factors such as type and source of the dietary fibre, their molecular weight, type of extraction and purification methods employed, composition and modification of polysaccharide and oligosaccharide. This review will demonstrate evidence that polysaccharides and oligosaccharides from marine algae can be used as prebiotics, emphasizing their use in human health, their application as food and other possible applications. Furthermore, an important approach of microbial enzymes employment during extraction, modification or production of those prebiotics is highlighted.
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Affiliation(s)
- Daniela de Borba Gurpilhares
- Faculdade de Farmácia, Universidade Federal do Rio de Janeiro, Av. Aluizio da Silva Gomes, 50, Granja dos Cavaleiros, 27930-560 Macaé, RJ, Brazil
| | - Leonardo Paes Cinelli
- Faculdade de Farmácia, Universidade Federal do Rio de Janeiro, Av. Aluizio da Silva Gomes, 50, Granja dos Cavaleiros, 27930-560 Macaé, RJ, Brazil; Grupo de Glicofármacos - Laboratório Integrado de Prospecção em Produtos Bioativos, Faculdade de Farmácia, Universidade Federal do Rio de Janeiro, Av. Aluizio da Silva Gomes, 50, Granja dos Cavaleiros, 27930-560 Macaé, RJ, Brazil
| | - Naomi Kato Simas
- Universidade Federal do Rio de Janeiro, Faculdade de Farmácia, Av. Carlos Chagas Filho, 373. Ilha do Fundão, 21941-902, Rio de Janeiro, RJ, Brazil
| | - Adalberto Pessoa
- Departamento de Tecnologia Bioquímico-Farmacêutica, Faculdade de Ciências Farmacêuticas, Universidade de São Paulo, Av. Prof. Lineu Prestes, 580, Bloco 16, 05508-900 São Paulo, SP, Brazil
| | - Lara Durães Sette
- Departamento de Bioquímica e Microbiologia, Instituto de Biociências, Universidade Estadual Paulista Júlio de Mesquita Filho - UNESP, Av. 24A, 1515, Bela Vista, 13506-900 Rio Claro, SP, Brazil
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Giménez JB, Bouzas A, Carrere H, Steyer JP, Ferrer J, Seco A. Assessment of cross-flow filtration as microalgae harvesting technique prior to anaerobic digestion: Evaluation of biomass integrity and energy demand. BIORESOURCE TECHNOLOGY 2018; 269:188-194. [PMID: 30172182 DOI: 10.1016/j.biortech.2018.08.052] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/13/2018] [Revised: 08/13/2018] [Accepted: 08/14/2018] [Indexed: 06/08/2023]
Abstract
In the present study, the effect of cross-flow filtration (CFF) on the overall valorization of Chlorella spp. microalgae as biogas was assessed. The effect of CFF on microalgae cell integrity was quantified in terms of viability which was correlated with the anaerobic biodegradability. The viability dropped as the biomass concentration increased, whereas anaerobic biodegradability increased linearly with the viability reduction. It was hypothesized that a stress-induced release and further accumulation of organic polymers during CFF increased the flux resistance which promoted harsher shear-stress conditions. Furthermore, the volume reduction as the concentration increased entailed an increase in the specific energy supply to the biomass. The energy demand was positive in the whole range of concentrations studied, yielding an overall energy efficiency as high as 22.9% for the highest concentration studied. Specifically, heat requirements were lower than electricity requirements only when the biomass concentrations exceeded 10 g COD·L-1.
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Affiliation(s)
- Juan B Giménez
- Departament d'Enginyeria Química, Escola Tècnica Superior d'Enginyeria, Universitat de València, Avda. de l'Universitat, s/n. 46100, Burjassot, València, Spain.
| | - Alberto Bouzas
- Departament d'Enginyeria Química, Escola Tècnica Superior d'Enginyeria, Universitat de València, Avda. de l'Universitat, s/n. 46100, Burjassot, València, Spain
| | - Hélène Carrere
- LBE, Univ Montpellier, INRA, 102, avenue des Etangs, 11100 Narbonne, France
| | | | - Jose Ferrer
- Institut Universitari d'Investigació d'Enginyeria de l'Aigua i Medi Ambient, IIAMA, Universitat Politècnica de València, Camí de Vera, s/n, 46022 València, Spain
| | - Aurora Seco
- Departament d'Enginyeria Química, Escola Tècnica Superior d'Enginyeria, Universitat de València, Avda. de l'Universitat, s/n. 46100, Burjassot, València, Spain
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Investigation of the cell disruption methods for maximizing the extraction of arginase from mutant Bacillus licheniformis (M09) using statistical approach. KOREAN J CHEM ENG 2018. [DOI: 10.1007/s11814-018-0107-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Advanced analysis of polysaccharides, novel functional components in food and medicine dual purposes Chinese herbs. Trends Analyt Chem 2017. [DOI: 10.1016/j.trac.2017.06.006] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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Liu X, Chen Y, Wu L, Wu X, Huang Y, Liu B. Optimization of polysaccharides extraction from Dictyophora indusiata and determination of its antioxidant activity. Int J Biol Macromol 2017; 103:175-181. [DOI: 10.1016/j.ijbiomac.2017.04.125] [Citation(s) in RCA: 52] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2016] [Revised: 01/18/2017] [Accepted: 04/25/2017] [Indexed: 12/01/2022]
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Polysaccharides from Trichosanthes Fructus via Ultrasound-Assisted Enzymatic Extraction Using Response Surface Methodology. BIOMED RESEARCH INTERNATIONAL 2017; 2017:6160785. [PMID: 29147656 PMCID: PMC5632990 DOI: 10.1155/2017/6160785] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/01/2017] [Accepted: 08/20/2017] [Indexed: 11/21/2022]
Abstract
An efficient procedure for ultrasound-assisted enzymatic extraction of crude polysaccharides from Trichosanthes Fructus (crude TFP) using response surface methodology (RSM) was developed. The Box–Behnken design was applied to optimize the effects of pH (X1), enzyme amount (X2), extraction temperature (X3), and liquid-to-solid ratio (X4) on the extraction. The statistical analysis indicated that the independent variables (X4, X2, and X3), the quadratic coefficients (X12, X22, X32, and X42), and the interaction coefficient (X1X3) had significant impact on the yield of crude TFP. The optimal conditions were determined as follows: pH 4.5, enzyme amount 5000 u/g, extraction temperature 45°C, and liquid-to-solid ratio 30 ml/g. The experimental yield of crude TFP was 6.58%, which was very close to the predicted yield of 6.71%. TFPI was then purified and characterized with Sephadex G-100 column, UV-Vis, GPC, and FT-IR. The average molecular weight of TFPI was calculated to be 1.49 × 105 Da. TFPI exhibited strong reducing power and possessed not only remarkable scavenging activities against ABTS•+ and DPPH radicals, but also high antitumor activities in C4-2, DU145, and PC3 cells. The results suggest that Trichosanthes Fructus and TFPI could be a novel potent natural medicine with antioxidant and antitumor activities.
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Abdul Razack S, Duraiarasan S, Mani V. Biosynthesis of silver nanoparticle and its application in cell wall disruption to release carbohydrate and lipid from C. vulgaris for biofuel production. ACTA ACUST UNITED AC 2016; 11:70-76. [PMID: 28352542 PMCID: PMC5042295 DOI: 10.1016/j.btre.2016.07.001] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2016] [Revised: 06/23/2016] [Accepted: 07/07/2016] [Indexed: 12/01/2022]
Abstract
The AgNP was successfully synthesised from soil isolated bacterium Bacillus subtilis. The synthesised AgNPs were confirmed by UV-Spec, FTIR, TEM and XRD. The AgNPs were successfully treated microalga to disrupt its cell wall to release lipids and carbohydrates. The cell wall damages evidenced by LDH assay and SEM.
Microalgae are the fledging feedstocks yielding raw materials for the production of third generation biofuel. Assorted and conventional cell wall disruption techniques were helpful in extracting lipids and carbohydrates, nevertheless the disadvantages have led the biotechnologists to explore new process to lyse cell wall in a faster and an economical manner. Silver nanoparticles have the ability to break the cell wall of microalgae and release biomolecules effectively. Green synthesis of silver nanoparticles was performed using a novel bacterial isolate of Bacillus subtilis. Characterisation of nanosilver and its effect on cell wall lysis of microalgae were extensively analysed. Cell wall damage was confirmed by lactate dehydrogenase assay and visually by SEM analysis. This first piece of research work on direct use of nanoparticles for cell wall lysis would potentially be advantageous over its conventional approaches and a greener, cost effective and non laborious method for the production of biodiesel.
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Affiliation(s)
- Sirajunnisa Abdul Razack
- Bioprocess Laboratory, Department of Chemical Engineering, Annamalai University, Annamalai Nagar, 608002 Tamil Nadu, India
| | - Surendhiran Duraiarasan
- Biology Laboratory, Department of Biology, St. Joseph University, Dar es Salaam 11077, United Republic of Tanzania
| | - Vijay Mani
- Bioelectrochemical Laboratory, Department of Chemical Engineering, Annamalai University, Annamalai Nagar 608002 Tamil Nadu, India
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Effect of Various Pretreatment for Extracting Intracellular Lipid from Nannochloropsis oculata under Nitrogen Replete and Depleted Conditions. ACTA ACUST UNITED AC 2014. [DOI: 10.1155/2014/536310] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Microalga is one of the most compelling microbial biomasses for biodiesel production. Various pretreatment processes, namely, enzyme treatment, lysis by acid, ultrasonicator, microwaves, autoclave, and 40% NaCl, for nitrogen replete and depleted algal cultures of Nannochloropsis oculata had been carried out to check the most feasible and effective technique to disrupt cells for procuring lipids, for which concentrations were determined. Fatty acid composition, essential functional groups, and cell disruption were analyzed by GC-MS, FT-IR Spectroscopy, and Nile Red fluorescent microscopy, respectively. The present investigation showed that lipid yield was higher in nitrogen depleted cells than that in normally nourished cells. GC-MS revealed the presence of major fatty acids—palmitic, oleic, stearic, arachidic, lauric, and linoleic acids. Highest efficiency was found when cells were pretreated using acid for 3 h. The lipid content was calculated as 33.18% and 54.26% for nitrogen rich cells and nitrogen starved cells, respectively. This work thus aided in identifying the most eligible pretreatment process to avail lipids from cells, to convert them to eco-friendly and nonpolluting biodiesel.
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Zhang Z, Lv G, He W, Shi L, Pan H, Fan L. Effects of extraction methods on the antioxidant activities of polysaccharides obtained from Flammulina velutipes. Carbohydr Polym 2013; 98:1524-31. [DOI: 10.1016/j.carbpol.2013.07.052] [Citation(s) in RCA: 105] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2013] [Revised: 06/25/2013] [Accepted: 07/22/2013] [Indexed: 12/12/2022]
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