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| 1 | Allelopathic effects of gallic acid from Aegiceras corniculatum on Cyclotella caspia显示文摘High abundance of algae and eutrophication were observed in mangrove wetlands and these were estimated to be associated with root exudates of some specific mangrove plants to a certain extent.Root exudates form allelopathic effects from mangroves.The main secondary metabolites of Aegiceras corniculatum had been detected to be organic phenolic acids.Gallic acid had been isolated and identified from A.corniculatum.The half-maximal inhibitory concentration of gallic acid on alge Cyclotella caspia was tested as 15.46mg/L.The effects on algal cell morphology were mainly shown as elongated cells,with no apparent cell inclusions,such as oil droplets,chloroplast.At a dose of 2mg/L,gallic acid had a stimulative effect on the specific growth rate of algae on day 3.The contents of malondialdehyde,superoxide dismutase,soluble carbohydrates and chlorophyll a in algal cells showed an overall 'low promotion and high suppression'.Our results could provide preliminary and valuable reference on the complex influences of mangroves on microecology and microbial communities in the rhizosphere system. | Yu Liu Fei Li Qixin Huang | 2013 | Journal of Environmental Sciences2013,25,4: | 11 |
| 2 | Biosynthesis of Triacylglycerol Molecules with a Tailored PUFA Profile in Industrial Microalgae显示文摘The composition of polyun saturated fatty acids (PUFAs) in triacylglycerols (TAGs) is key to health ben efits and for oil applications, yet the underlying genetic mechanism remains poorly understood. In this study, by in si Iico, ex vivo, and in vivo profili ng of type-2 diacylglycerol acyltransferases (DGAT2s) in Nannochloropsis oceanica we revealed two novel PUFA-preferring enzymes that discriminate individual PUFA species in TAG assembly, with NoDGAT2J for linoleic acid (LA) and NoDGAT2K for eicosapentaenoic acid (EPA). The LA and EPA composition of TAG molecules is mediated in vivo via the functional partitioning between NoDGAT2J and 2K, both of which are localized in the chloroplast envelope. By modulating transcript abundance of the DGAT2s, an N. oceanica strain bank was created, where proportions of LA and EPA in TAG vary by 18.7-fold (between 0.21% and 3.92% dry weight) and 34.7-fold (between 0.09% and 3.12% dry weight), respective!y. These findings lay the foundation for producing designer TAG molecules with tailored health benefits or for biofuel applications in industrial microalgae and higher-plant crops. | Yi Xin Chen Shen Yiting She Hong Chen Cong Wang Li Wei Kangsup Yoon Danxiang Han Qiang Hu Jian Xu | 2019 | Molecular Plant2019,12,4: | 10 |
| 3 | Microalgae:A potential alternative to health supplementation for humans显示文摘Microalgae has been consumed in human diet for thousands of years.It is an under-exploited crop for production of dietary foods.Microalgae cultivation does not compete with land and resources required for traditional crops and has a superior yield compared to terrestrial crops.Its high protein content has exhibited a huge potential to meet the dietary requirements of growing population.Apart from being a source of protein,presence of various bio-active components in microalgae provide an added health benefit.This review describes various microalgal sources of proteins and other bio-active components.One of the heavily studied group of bio-active components are pigments due to their anticarcenogenic,antioxidative and antihypertensive properties.Compared to various plant and floral species,microalgae contain higher amounts of pigments.Microalgal derived proteins have complete Essential Amino Acids(EAA)profiles and their protein content is higher than conventional sources such as meat,poultry and dairy products.However,microalgal based functional foods have not flooded the market.The lack of awareness coupled with scarce incentives for producers result in under-exploitation of microalgal potential.Application of microalgal derived components as dietary and nutraceutical supplements is discussed comprehensively. | Apurav Krishna Koyande Kit Wayne Chew Krishnamoorthy Rambabu Yang Tao Dinh-Toi Chu Pau-Loke Show | 2019 | Food Science and Human Wellness2019,8,1: | 10 |
| 4 | Review of the biological and engineering aspects of algae to fuels approach显示文摘Current biofuel production relies on limited arable lands on the earth,and is impossible to meet the biofuel demands.Oil producing algae are alternative biofuel feedstock with potential to meet the world’s ambitious goal to replace fossil fuels.This review provides an overview of the biological and engineering aspects in the production and processing technologies and recent advances in research and development in the algae to fuels approach.The article covers biology,selection and genetic modification of algae species and strains,production systems design,culture media and light management,harvest and dewatering,downstream processing,and environment and economic assessment.Despite the many advances made over several decades,commercialization of algal fuels remains challenging chiefly because of the techno-economic constraints.Technological breakthroughs in all major aspects must take place before commercial production of algal fuels becomes economically viable. | Paul Chen Min Min Yifeng Chen Liang Wang Yecong Li Qin Chen Chenguang Wang Yiqin Wan Xiaoquan Wang Yanling Cheng Shaobo Deng Kevin Hennessy Xiangyang Lin Yuhuan Liu Yingkuan Wang Blanca Martinez Roger Ruan | 2009 | International Journal of Agricultural and Biological Engineering2009,2,4: | 9 |
| 5 | Inhibitory activities of microalgal fucoxanthin againstα-amylase,α-glucosidase, and glucose oxidase in 3T3-L1cells linked to type 2 diabetes显示文摘Postprandial hyperglycemia is an early indication of type 2 diabetes and the target of many anti-diabetic and anti-obesity studies.α-Glucosidase and α-amylase are the crucial factors in regulating starch digestion and glucose absorption,making them key targets for many studies to treat postprandial hyperglycemia.We studied the inhibitory activities of microalgal fucoxanthin against rat-intestinalα-glucosidase and pancreaticα-amylase along with the antidiabetic eff ect to induce diff erentiation in 3T3-L1 pre-adipocytes using Oil Red-O staining.Fucoxanthin displayed strong hindrance activities towardα-amylase in a concentration-dependent manner,with an IC50 value of 0.68mmol/L,whereas weak inhibitory activity against α-glucosidase,with an IC 50 value of 4.75 mmol/L.Fucoxanthin also considerably elevated glucose oxidase activity in 3T3-L1 cells by 31.3%at 5μmol/L.During adipocyte differentiation,fucoxanthin showed lipid accumulation in 3T3-L1 cells with no cytotoxicity up to 20μmol/L.However,fucoxanthin had no inhibitory activity on glucose-6-phosphate dehydrogenase.These results suggest that fucoxanthin might be useful for the prevention of obesity or diabetes by inhibiting carbohydrate-hydrolyzing enzymes and lipid accumulation and be utilized as an ingredient for a functional food or dietary supplement. | KAWEE-AI Arthitaya KIM Aaron Taehwan KIM Sang Moo | 2019 | Journal of Oceanology and Limnology2019,37,3: | 7 |
| 6 | Aqueous extracts of microalgae exhibit antioxidant and anticancer activities显示文摘Objective:To investigate the antioxidant and anticancer activities of aqueous extracts of nine microalgal species.Methods:Variable percentages of major secondary metabolites(total phenolic content,terpenoids and alkaloids) as well as phycobiliprotein pigments(phycocyanin, allophycocyanin and phycoerythrin) in the aqueous algal extracts were recorded.Antioxidant activity of the algal extracts was performed using 2,2 diphenyl-1-picrylhydrazyl(DPPH) test and 2,2'azino-bis(ethylbenzthiazoline-6-sulfonic acid(ABTS.) radical cation assay.Anticancer efficiency of the algal water extracts was investigated against Ehrlich Ascites Carcinoma cell(EACC) and Human hepatocellular cancer cell line(HepG2).Results:Antioxidant activity of the algal extracts was performed using DPPH test and ABTS.^+ radical cation assays which revealed 30.1-72.4%and 32.0-75.9%respectively.Anticancer efficiency of the algal water extracts was investigated against Ehdich Ascites Carcinoma Cell(EACC) and Human Hepatocellular cancer cell line(HepG2) with an activity ranged 87.25%and 89.4%respectively.Culturing the promising cyanobacteria species;Nostoc muscorum and Oscillatoria sp.under nitrogen stress conditions(increasing and decreasing nitrate content of the normal BG11 medium,1.5 g/L),increased nitrate concentration(3,6 and 9 g/L) led to a remarkable increase in phycobilin pigments followed by an increase in both antioxidant and anticancer activities in both cyanobacterial species.While the decreased nitrate concentration(0.75,0.37 and 0.0 g/L) induced an obvious decrease in phycobilin pigments with complete absence of allophycocyanin in case of Oscillatoria sp.Conclusions:Nitrogen starvation(0.00 g/L nitrate) induced an increase and comparable antioxidant and anticancer activities to those cultured in the highest nitrate content. | Sanaa MM Shanab Soha SM Mostafa Emad A Shalaby Ghada I Mahmoud | 2012 | Asian Pacific Journal of Tropical Biomedicine2012,2,8: | 6 |
| 7 | Comparative study on thermal cracking characteristics and bio-oil production from different microalgae using Py-GC/MS显示文摘The yield and chemical composition of pyrolysis products of Chlorella pyrenoidosa and Schizochytrium limacinum were determined using thermogravimetric analyzer(TGA)and pyrolysis-gas chromatographic mass spectrometry(Py-GC/MS)by varying the temperature ranges.After further analysis of the total ion current(TIC)diagrams of Chlorella pyrenoidosa and Schizochytrium limacinum,it was concluded that both the pyrolysis products of each sample were mainly comprised of hydrocarbons,aromatics,fatty acids,nitrogen compounds,PAHs,phenols,etc,however,the relative content of each compound from Chlorella pyrenoidosa and Schizochytrium limacinum was different.The pyrolysis of Chlorella pyrenoidosa and Schizochytrium limacinum at 350℃ produced a maximum yield of bio-oil production(44.32%and 60.99%);moreover,Chlorella pyrenoidosa could lead to more pollutants(nitrogen compounds and PAHs)release(2.71%)compared to that of Schizochytrium limacinum(0.7%).Considering the reasonable bio-oil production and minimum release of pollutants,Schizochytrium limacinum was found to be superior for producing biofuel against Chlorella pyrenoidosa. | Gang Li Fang Ji Xue Bai Yuguang Zhou Renjie Dong Zhigang Huang | 2019 | International Journal of Agricultural and Biological Engineering2019,12,1: | 5 |
| 8 | Nutrients removal and biomass production from anaerobic digested effluent by microalgae: A review显示文摘This article summarizes the recent progress of nutrient removal from wastewater via microalgae.Removal of nitrogen and phosphorous compounds from wastewater are of great importance,while those compounds are suitable for growth of some microalgae species.Such a combination provides more opportunities for anaerobic digestion facilities,which are producing large amount of wastewater with high nitrogen and phosphorous contents.However,in order to optimize and maximize the performance and durability of the nutrient removal process,it is suggested that the basic principles about nitrogen and phosphorous migration should be investigated thoroughly,especially from the fundamentals of substance transfer mechanism between water environment and algal cells. | Gang Li Xue Bai Huan Li Zhitao Lu Yuguang Zhou Yingkuan Wang Jinxin Cao Zhigang Huang | 2019 | International Journal of Agricultural and Biological Engineering2019,12,5: | 5 |
| 9 | Life cycle assessment of biofuel production from microalgae cultivated in anaerobic digested wastewater显示文摘The whole process of biofuel production from Desmodesmus sp.EJ 8-10 cultivated in anaerobic digested wastewater(ADW)under the optimal temperature was evaluated by using the method of Life Cycle Assessment(LCA).The energy efficiency and environment emissions were under considerable for the corresponding parametric study.The functional unit was 1 kg microalgae.It was concluded that the harvest stage was responsible for the main energy consumption during the microalgal whole pyrolysis process.The energy conversion efficiency of the whole process was larger than 1,which indicated that the process was profitable.The environmental impact of the whole process was 1165.67 mPET2000,among which the primary impact on the environment was eutrophication that accounts for 57.36%,followed by photochemical ozone synthesis(22.56%),acidification(17.36%);and global warming(2.73%),respectively. | Gang Li Zhitao Lu Jiang Zhang Huan Li Yuguang Zhou Ali Mohammed Ibrahim Zayan Zhigang Huang | 2020 | International Journal of Agricultural and Biological Engineering2020,13,1: | 4 |
| 10 | Fatty acid methyl ester profiles and nutritive values of 20 marine microalgae in Korea显示文摘Objecive:To screen the fatty acid(FA) composition of 20 marine microalgae species,including seven Diophyceae,six Bacillariophyeae four Chlorophyceae,two Haptophyceae and one Raphidophyceae species.Methods:Microalgal cells cultured at the Korea Institute of Ocean Science & Technology were harvested during the late exponential growth phase and the FA composition analyzed.Results:The FA composition of microalgae was speciesspecific.For example,seven different species of Dinophyceae were composed primarily of C14:0,C16:0.C18:0.C20:4n-6.C20:5n-3 and C22:6n-3.while C14:0.C16:0,C16:1.C18:0.C20:5n-3 and C22:6n-3 were abundant FAs in six species of Bacillariophyceae.In addition,four Chlurophyceae,two Haptopkyeeae and one Raphidophyceae species all contained a high degree of C16:1 n-7[(9.2R-34.91)%and(34.48-35.04)%].C14:0[(13.34-25.96)%]and[(26.69-Z8.24)%],and C16:0[(5.89-29.15)%]and[(5.70-16.81)%].Several factors contribute to the nutritional value of microalgae.including the polyunsaturated FA content and n-3 to n-6 FA ratio,which could be used to assess the nutritional quality of microalgae.Conclusions:This study is the first comprehensive assessment of the FA composition and nutritional value of microalgae species in South Korea,and identifies the potential utility of FAs as species-specific biomarkers. | Sung-Suk Suh So Jung Kim Jinik Hwang Mirye Park Taek-Kyun Lee Eui-Joon Kil Sukchan Lee | 2015 | Asian Pacific Journal of Tropical Medicine2015,8,3: | 3 |
| 11 | Life cycle assessment of pyrolysis process of Desmodesmus sp.显示文摘This paper described a comprehensive assessment of the pyrolysis process of 1 kg Desmodesmus sp.cultivated in BG11 medium at the optimum temperature by using life cycle assessment method.This assessment took 1 kg of Desmodesmus sp.as a functional unit,and chose energy efficiency analysis and potential environmental impact as assessment indices.The results showed that the energy conversion efficiency index of the pyrolysis process was above 1,which meant the pyrolysis process was beneficial.The primary impact of the pyrolysis process on the environment was eutrophication;which followed by photochemical ozone synthesis and acidification;and global warming impact was the last.The overall environmental impact during the whole life cycle was 1347.63 mPET2000. | Li Gang Ji Fang Zhou Yuguang Dong Renjie | 2015 | International Journal of Agricultural and Biological Engineering2015,8,5: | 3 |
| 12 | Lacustrine biomass: An significant precursor of high wax oil显示文摘Although a variety of precursors have been proposed for the formation of high molecular weight hydro-carbons (HMWHCs) in crude oil, their precise origin re-mains elusive. Quantitative studies of macrocrystalline wax and microcrystalline wax content of source rock extracts from the Damintun depression, Liaohe Basin, a typical high wax producing area, coupled with microscopical maceral composition studies and pyrolysis-GC analysis indicate that oil shale enriched in lacustrine biomass makes a primary contribution to wax in oil. The main precursors of high wax oil are lacustrine alginites and their amorphous matrix, which are highly aliphatic in nature and have high genera-tive potential for HMWHCs. Wax generation efficiency could be affected by organic material abundance and matur-ity. The high abundance and low maturity of organic mate-rial are favorite for the formation of high quantity of wax, which declines with decreasing organic abundance and in-creasing thermal maturity. This suggests that wax is derived from organic-rich lacustrine biomass at early stages of maturation (RO = 0.4%—0.7%). Although the contribution of high plant cuticular wax and sporopollen cannot be ruled out, lacustrine biomass is more important in the formation of high wax oil. | Haiping Huang Yabin Zheng Zhanwen Zhang Jinyou Li | 2003 | Chinese Science Bulletin2003,48,18: | 3 |
| 13 | Analytical study on pyrolyzed products of Desmodesmus sp.cultivated in BG11显示文摘Pyrolysis-Gas Chromatography-Mass Spectrometry(Py-GC/MS)was adopted to determine the changes in component of BG11-cultivated Desmodesmus sp.(BG11/8-10)pyrolyzed products at different temperatures(300℃-800℃).The results of analysis on a series of total ions chromatogram(TIC)showed that pyrolyzed products of BG11/8-10 at different temperature mainly included aliphatic hydrocarbons,nitrogen compounds,aromatic hydrocarbons,fatty acids,ketones,alcohols,aldehydes and furan compounds.Compared to the bio-oil(42.36%)generated by pyrolysis at 700℃,the relative content of bio-oil generated at 800℃was the highest up to 56.96%.However,higher temperature could easily cause the generation of large quantities of such pollutants as nitrogen compounds and polycyclic aromatic hydrocarbons(PAHs).Therefore,based on lower pollutant discharge and higher bio-oil yield,the optimal pyrolysis temperature of BG11/8-10 was around 700℃. | Li Gang Ji Fang Xiang Shunan Zhou Yuguang Jiang Mengmeng Huang Zhigang | 2017 | International Journal of Agricultural and Biological Engineering2017,10,3: | 3 |
| 14 | Thermal cracking products and bio-oil production from microalgae Desmodesmus sp.显示文摘Qualitative and quantitative analyses of thermal cracking products from Desmodesmus sp.were performed based on pyrolysis-gas chromatography-mass spectrometry(Py-GC/MS)at different temperature regimes(350℃-750℃).After further analysis of a series of total ions chromatogram(TIC)and summarized,thermal cracking products of Desmodesmus sp.at different temperature regimes can be obtained,which mainly comprised of aliphatic hydrocarbons,nitrogen compounds,aromatic hydrocarbons,fatty acids,ketones,alcohols,aldehydes and furan compounds.Compared to bio-oil production at 650℃(32.07%),Desmodesmus sp.pyrolyzed at 750℃could produce the highest bio-oil content of 42.25%.However,higher temperature could lead to the formation of contaminants(nitrogen compounds and PAHs)more easily.Therefore,considering the higher content of bio-oil conversion and less pollutants generation,the optimum temperature for Desmodesmus sp.thermal cracking conversion was about 650℃. | Li Gang Xiang Shunan Ji Fang Zhou Yuguang Huang Zhigang | 2017 | International Journal of Agricultural and Biological Engineering2017,10,4: | 3 |
| 15 | Review on docosahexaenoic acid in poultry and swine nutrition:Consequence of enriched animal products on performance and health characteristics显示文摘Omega-3 polyunsaturated fatty acids(n-3 PUFA) are linked to a variety of health benefits against human disorders and disease. However, the typical western diet is generally low in n-3 PUFA and high in n-6 PUFA, suggesting that the recommended intake of these essential fatty acids is seldom achieved.Therefore, dietary enrichment of animal meat and eggs with n-3 PUFA could help increase consumption of these fatty acids. Fish oils and microalgae(MA) are rich sources of long chain n-3 PUFA, specifically eicosapentaenoic acid(EPA) and docosahexaenoic acid(DHA). Feeding these marine products has been shown to increase DHA content of tissues and yolk, however, this may also lead to an increased requirement for anti-oxidants to prevent oxidative deterioration and associated negative sensory attributes. Nonetheless, increased DHA has been linked to promising results in animal growth, fertility,immunity and bone strength in both pigs and poultry. These findings suggest that feeding DHA-rich ingredients to mono-gastric can enrich human diets as well as providing additional benefits to the animal. | Sophie A.Lee Natasha Whenham Michael R.Bedford | 2019 | Animal Nutrition2019,,1: | 2 |
| 16 | Identification of high-lipid producers for biodiesel production from forty-three green algal isolates in China | An-yue LIU Wei CHEN Ling-ling ZHENG Li-rong SONG | 2011 | Progress in Natural Science:Materials International2011,21,4: | 2 |
| 17 | Isolation of protein from Chlorella sorokiniana CY1 using liquid biphasic flotation assisted with sonication through sugaring-out effect显示文摘Microalgae,a sustainable source of multi beneficial components has been discovered and could be utilised in pharmaceutical,bioenergy and food applications.This study aims to investigate the sugaring-out effect on the recovery of protein from wet green microalga,Chlorella sorokiniana CY1 which was assisted with sonication.A comparison of monosaccharides and disaccharides as one of the phaseforming constituents shows that the monosaccharides,glucose was the most suitable sugar in forming the phases with acetonitrile to enhance the production of protein(52% of protein).The protein productivity of microalgae was found to be significantly influenced by the volume ratio of both phases,as the yield of protein increased to 77%.The interval time between the sonication as well as the sonication modes were influencing the protein productivity as well.The optimum protein productivity was obtained with 10s of resting time in between sonication.Pulse mode of sonication was suitable to break down the cell wall of microalgae compared to continuous mode as a lower protein yield was obtained with the application of continuous mode.The optimum condition for protein extraction were found as followed:200g/L glucose as bottom phase with volume ratio of 1:1.25,10s of resting time for ultrasonication,5s of ultrasonication in pulse mode and 0.25g of biomass weight.The high yield of protein about 81% could be obtained from microalgae which demonstrates the potential of this source and expected to play an important role in the future. | CHIA Shir Reen CHEW Kit Wayne SHOW Pau Loke SIVAKUMAR Manickam LING Tau Chuan TAO Yang | 2019 | Journal of Oceanology and Limnology2019,37,3: | 2 |
| 18 | Research progress in removal of trace carbon dioxide from closed spaces显示文摘In this paper,the removal of trace carbon dioxide from closed spaces through membrane process and biotrans-formation are introduced in detail.These methods include the microalgae photobioreactor,membrane microalgae photobio-reactor,supported liquid membrane,membrane gas-liquid contactor,hydrogel membrane,and enzyme membrane biore-actor.The advantages and disadvantages of these methods are compared.It is found that higher CO_(2) removal efficiency can be obtained in biotransformation and membrane process.However,a large volume and high energy consumption are needed in biotransformation,while the low permeability and stability must be solved in the membrane process. | ZHANG Yatao FAN Lihai ZHANG Lin CHEN Huanlin | 2007 | Frontiers of Chemical Science and Engineering2007,1,3: | 2 |
| 19 | Emerging industrial applications of microalgae:challenges and future perspectives显示文摘Microalgae are unicellular photosynthetic organisms that have been recently attracted potential interests and have applications in food,nutraceuticals,pharmaceuticals,animal feed,cosmetics,and biofertilizers industry.Microalgae are rich in a variety of high-value bioactive compounds which have potential benefits on human health and can be used for the prevention and curing of many disease conditions.But scale-up and safety issues remain a major challenge in the commercialization of microalgal products in a cost-effective manner.However,techniques have been developed to overcome these challenges and successfully selling the products derived from microalgae as food,cosmetics and pharmaceutical industries.Microalgae are rich in many nutrients and can be used for the production of functional food and nutraceuticals,safety and regulatory issues are major concerns and extensive research is still needed to make microalgae a commercial success in the future.Many practical difficulties are involved in making the microalgal food industry commercially viable.The present review focuses on the industrial applications of microalgae and the challenges faced during commercial production. | Aswathy Udayan Ashutosh Kumar Pandey Pooja Sharma Nidhin Sreekumar Sunil Kumar | 2021 | Systems Microbiology and Biomanufacturing2021,1,4: | 2 |
| 20 | Antibacterial screening of silver nanoparticles synthesized by marine micro algae显示文摘Objective:To explore the biosynthesis of silver nanoparticles synthesized by marine microalgae. Methods:Marine microalgae was collected from Central Marine Fisheries Research Institute (CMFRI,tuticorin) and cultured in the lab.Silver nanoparticles synthesis were observed in normal and microwave irradiated microalgae and screened against human pathogens for the presence of antimicrobials.Results:The presence of silver nanoparticle was confirmed by UV-Visible spectroscopy at 420 nm by the presence of plasmon peak.Further confirmation was done by scanning electron microscope(SEM).Conclusions:These results not only provide a base for further research but are useful for drug development in the present and future. | D Devina Merin S Prakash B Valentine Bhimba | 2010 | Asian Pacific Journal of Tropical Medicine2010,3,10: | 2 |