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https://www.readbyqxmd.com/read/28927020/stable-carbon-isotope-composition-of-the-lipids-in-natural-ophiocordyceps-sinensis-from-major-habitats-in-china-and-its-substitutes
#1
Lian-Xian Guo, Xiao-Ming Xu, Yue-Hui Hong, Yan Li, Jiang-Hai Wang
Ophiocordyceps sinensis is one rare medicinal fungus produced in the Qinghai-Tibetan Plateau. Its quality and price varies hugely with different habitat, and its numerous substitutes have sprung up in functional food markets. This paper aims to discriminate the geographic origin of wild O. sinensis and its substitutes via element analyzer-isotope ratio mass spectrometry and gas chromatography-isotope ratio mass spectrometry. The δ(13)C values of major fatty acids in the lipids of O. sinensis are characterized unanimously by the variation relation C18:0 < C18:2 ≈ C16:0 < C18:1, while their fluctuation intervals are notably different between those of neutral and polar lipids...
September 18, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28927000/anti-inflammatory-and-anti-oxidative-activities-of-phenolic-compounds-from-alnus-sibirica-stems-fermented-by-lactobacillus-plantarum-subsp-argentoratensis
#2
Thi Tam Le, Jun Yin, MinWon Lee
Fermentation of Alnus sibirica (AS) stems using Lactobacillus plantarum subsp. argentoratensis was conducted and three compounds isolated from the Alnus species were identified for the first time, 7-(3,4-dihydroxyphenyl)-1-(4-hydroxyphenyl)-heptan-3-one, 1-(3,4-dihydroxyphenyl)-7-(4-hydroxyphenyl)-heptan-3-one and 4-(3,4-dihydroxyphenyl)-butan-2-one, along with 14 known compounds. The anti-oxidative and anti-inflammatory abilities of AS and fermented AS (FAS) as well as the isolated phenolic compounds from FAS were investigated...
September 18, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28926922/potential-use-and-the-energy-conversion-efficiency-analysis-of-fermentation-effluents-from-photo-and-dark-fermentative-bio-hydrogen-production
#3
Zhiping Zhang, Yameng Li, Huan Zhang, Chao He, Quanguo Zhang
Effluent of bio-hydrogen production system also can be adopted to produce methane for further fermentation, cogeneration of hydrogen and methane will significantly improve the energy conversion efficiency. Platanus Orientalis leaves were taken as the raw material for photo- and dark-fermentation bio-hydrogen production. The resulting concentrations of acetic, butyric, and propionic acids and ethanol in the photo- and dark-fermentation effluents were 2966mg/L and 624mg/L, 422mg/L and 1624mg/L, 1365mg/L and 558mg/L, and 866mg/L and 1352mg/L, respectively...
September 8, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28926915/bioelectrochemical-methane-ch4-production-in-anaerobic-digestion-at-different-supplemental-voltages
#4
Kwang-Soon Choi, Sanath Kondaveeti, Booki Min
Microbial electrolysis cells (MECs) at various cell voltages (0.5, 0.7 1.0 and 1.5V) were operated in anaerobic fermentation. During the start-up period, the cathode potential decreased from -0.63 to -1.01V, and CH4 generation increased from 168 to 199ml. At an applied voltage of 1.0V, the highest methane yields of 408.3ml CH4/g COD glucose was obtained, which was 30.3% higher than in the control tests (313.4ml CH4/g COD glucose). The average current of 5.1mA was generated at 1.0V at which the maximum methane yield was obtained...
September 8, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28926680/formic-acid-as-a-secondary-substrate-for-succinic-acid-production-by-metabolically-engineered-mannheimia-succiniciproducens
#5
Jung Ho Ahn, Junho Bang, Won Jun Kim, Sang Yup Lee
There has been much effort exerted to reduce one carbon (C1) gas emission to address climate change. As one promising way to more conveniently utilize C1 gas, several technologies have been developed to convert C1 gas into useful chemicals such as formic acid (FA). In this study, systems metabolic engineering was utilized to engineer Mannheimia succiniciproducens to efficiently utilize FA. (13) C isotope analysis of M. succiniciproducens showed that FA could be utilized through formate dehydrogenase (FDH) reaction and/or the reverse reaction of pyruvate formate lyase (PFL)...
September 19, 2017: Biotechnology and Bioengineering
https://www.readbyqxmd.com/read/28925282/corrigendum-bacterial-community-composition-and-fermentation-in-the-rumen-of-xinjiang-brown-cattle-bos-taurus-tarim-red-deer-cervus-elaphus-yarkandensis-and-karakul-sheep-ovis-aries
#6
Wenxi Qian, ZhiPeng Li, Weiping Ao, Guangyong Zhao, JianPing Wu, Guangyu Li
No abstract text is available yet for this article.
September 18, 2017: Canadian Journal of Microbiology
https://www.readbyqxmd.com/read/28925260/tailoring-the-oxidative-stress-tolerance-of-clostridium-tyrobutyricum-cctcc-w428-by-introducing-trehalose-biosynthetic-capability
#7
Qian Wu, Liying Zhu, Qing Xu, He Huang, Ling Jiang, Shang-Tian Yang
Fermentations employing anaerobes always suffer from the restriction of the stringent anaerobic conditions during the production of bulk and fine chemicals. This work aims to improve the oxidative stress tolerance of C. tyrobutyricum CCTCC W428, an ideal butyric-acid-producing anaerobe, via the introduction of trehalose biosynthesis capability. Compared with the wild type, a wider substrate spectrum, an improved metabolic profile and a significantly increased specific growth rate were shown by the engineered strain upon aeration and acid challenge...
September 19, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28924494/genomic-and-functional-analysis-of-romboutsia-ilealis-crib-t-reveals-adaptation-to-the-small-intestine
#8
Jacoline Gerritsen, Bastian Hornung, Bernadette Renckens, Sacha A F T van Hijum, Vitor A P Martins Dos Santos, Ger T Rijkers, Peter J Schaap, Willem M de Vos, Hauke Smidt
BACKGROUND: The microbiota in the small intestine relies on their capacity to rapidly import and ferment available carbohydrates to survive in a complex and highly competitive ecosystem. Understanding how these communities function requires elucidating the role of its key players, the interactions among them and with their environment/host. METHODS: The genome of the gut bacterium Romboutsia ilealis CRIB(T) was sequenced with multiple technologies (Illumina paired-end, mate-pair and PacBio)...
2017: PeerJ
https://www.readbyqxmd.com/read/28924451/phenotypic-landscape-of-non-conventional-yeast-species-for-different-stress-tolerance-traits-desirable-in-bioethanol-fermentation
#9
Vaskar Mukherjee, Dorota Radecka, Guido Aerts, Kevin J Verstrepen, Bart Lievens, Johan M Thevelein
BACKGROUND: Non-conventional yeasts present a huge, yet barely exploited, resource of yeast biodiversity for industrial applications. This presents a great opportunity to explore alternative ethanol-fermenting yeasts that are more adapted to some of the stress factors present in the harsh environmental conditions in second-generation (2G) bioethanol fermentation. Extremely tolerant yeast species are interesting candidates to investigate the underlying tolerance mechanisms and to identify genes that when transferred to existing industrial strains could help to design more stress-tolerant cell factories...
2017: Biotechnology for Biofuels
https://www.readbyqxmd.com/read/28924201/discovery-semisynthesis-antiparasitic-and-cytotoxic-evaluation-of-14-membered-resorcylic-acid-lactones-and-their-derivatives
#10
Xue-Qing Zhang, Carmenza Spadafora, Laura M Pineda, Michelle G Ng, Ji-Hong Sun, Wei Wang, Chang-Yun Wang, Yu-Cheng Gu, Chang-Lun Shao
Ten antifouling 14-membered resorcylic acid lactones 1-10 were isolated previously with low or trace natural abundance from the zoanthid-derived Cochliobolus lunatus fungus. Further optimization of fermentation conditions led to the isolation of two major natural compounds 7 and 8 with multi-gram quantities. By one or two steps, we semisynthesized the six trace natural compounds 1-6 and a series of derivatives 11-27 of compounds 7 and 8 with high yields (65-95%). Compounds 11-13 showed strong antiplasmodial activity against Plasmodium falciparum with IC50 values of 1...
September 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28924192/short-chain-fatty-acids-ameliorate-immune-mediated-uveitis-partially-by-altering-migration-of-lymphocytes-from-the-intestine
#11
Yukiko K Nakamura, Cathleen Janowitz, Christina Metea, Mark Asquith, Lisa Karstens, James T Rosenbaum, Phoebe Lin
Short chain fatty acids (SCFA) are metabolites of intestinal bacteria resulting from fermentation of dietary fiber. SCFA are protective in various animal models of inflammatory disease. We investigated the effects of exogenous administration of SFCAs, particularly propionate, on uveitis using an inducible model of experimental autoimmune uveitis (EAU). Oral SCFA administration attenuated uveitis severity in a mouse strain-dependent manner through regulatory T cell induction among lymphocytes in the intestinal lamina propria (LPL) and cervical lymph nodes (CLN)...
September 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28923717/production-of-d-tagatose-and-bioethanol-from-onion-waste-by-an-intergrating-bioprocess
#12
Ho Myeong Kim, Younho Song, Seung Gon Wi, Hyeun-Jong Bae
The rapid increase of agricultural waste is becoming a burgeoning problem and considerable efforts are being made by numerous researchers to convert it into a high-value resource material. Onion waste is one of the biggest issues in a world of dwindling resource. In this study, the potential of onion juice residue (OJR) for producing valuable rare sugar or bioethanol was evaluated. Purified Paenibacillus polymyxaL-arabinose isomerase (PPAI) has a molecular weight of approximately 53kDa, and exhibits maximal activity at 30°C and pH 7...
September 15, 2017: Journal of Biotechnology
https://www.readbyqxmd.com/read/28923658/corrigendum-to-between-cow-variation-in-digestion-and-rumen-fermentation-variables-associated-with-methane-production-j-dairy-sci-100-4409-4424
#13
E H Cabezas-Garcia, S J Krizsan, K J Shingfield, P Huhtanen
No abstract text is available yet for this article.
October 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28923569/digestive-behavior-of-dendrobium-huoshanense-polysaccharides-in-the-gastrointestinal-tracts-of-mice
#14
Song-Zi Xie, Ji-Chun Ge, Fan Li, Jun Yang, Li-Hua Pan, Xue-Qiang Zha, Qiang-Ming Li, Jun Duan, Jian-Ping Luo
With fluorescent end-labeling method, a homogenous Dendrobium huoshanense polysaccharide (GXG) that was orally administrated to mice was found to be degraded into a stable fragment (dGXG) in the stomach, where dGXG was propelled into the small intestine and absorbed into the systemic circulation. The residual GXG in the stomach could pass through the gastrointestinal tract and was excreted into faeces with a very slow fermentation in the large intestine. The simulated digestion of GXG indicated that the acidic pH condition in the gastric fluid was responsible for GXG degradation, which was supported by the oral digestion of dGXG...
September 15, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28922915/influence-of-fermentation-temperature-yeast-strain-and-grape-juice-on-the-aroma-chemistry-and-sensory-profile-of-sauvignon-blanc-wines
#15
Rebecca Christina Deed, Bruno Fedrizzi, Richard C Gardner
Sauvignon blanc wine, balanced by herbaceous and tropical aromas, is fermented at low temperatures (10-15 °C). Anecdotal accounts from winemakers suggest that cold ferments produce and retain more 'fruity' aroma compounds; nonetheless, studies have not confirmed why low temperatures are optimal for Sauvignon blanc. Thirty-two aroma compounds were quantitated from two Marlborough Sauvignon blanc juices fermented at 12.5 °C and 25 °C, using Saccharomyces cerevisiae strains EC1118, L-1528, M2 and X5. Fourteen compounds were responsible for driving differences in aroma chemistry...
September 19, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28922898/brewer-s-yeast-saccharomyces-cerevisiae-enhances-attraction-of-two-invasive-yellowjackets-hymenoptera-vespidae-to-dried-fruit-and-fruit-powder
#16
Tamara Babcock, Regine Gries, John Borden, Luis Palmero, Analía Mattiacci, Maité Masciocchi, Juan Corley, Gerhard Gries
The German yellowjacket, Vespula germanica F., and common yellowjacket, Vespula vulgaris L. (Hymenoptera: Vespidae), are pests of significant economic, environmental, and medical importance in many countries. There is a need for the development and improvement of attractive baits that can be deployed in traps to capture and kill these wasps in areas where they are a problem. Yellowjackets are known to feed on fermenting fruit, but this resource is seldom considered as a bait due to its ephemeral nature and its potential attractiveness to nontarget species...
September 1, 2017: Journal of Insect Science
https://www.readbyqxmd.com/read/28922800/changes-in-fibre-adherent-and-fluid-associated-microbial-communities-and-fermentation-profiles-in-the-rumen-of-cattle-fed-diets-differing-in-hay-quality-and-concentrate-amount
#17
Fenja Klevenhusen, Renee M Petri, Maria-Theresia Kleefisch, Ratchaneewan Khiaosa-Ard, Barbara U Metzler-Zebeli, Qendrim Zebeli
The rumen microbiota enable important metabolic functions to the host cattle. Feeding of starch-rich concentrate feedstuffs to cattle has been demonstrated to increase the risk of metabolic disorders and to significantly alter the rumen microbiome. Thus, alternative feeding strategies like the use of high-quality hay, rich in sugars, as an alternative energy source need to be explored. The aim of this study was to investigate changes in rumen microbial abundances in the liquid and solid-associated fraction of cattle fed two hay qualities differing in sugar content with graded amounts of starchy concentrate feeds using Illumina MiSeq sequencing and quantitative polymerase chain reaction...
September 1, 2017: FEMS Microbiology Ecology
https://www.readbyqxmd.com/read/28922393/a-set-of-nutrient-limitations-trigger-yeast-cell-death-in-a-nitrogen-dependent-manner-during-wine-alcoholic-fermentation
#18
Camille Duc, Martine Pradal, Isabelle Sanchez, Jessica Noble, Catherine Tesnière, Bruno Blondin
Yeast cell death can occur during wine alcoholic fermentation. It is generally considered to result from ethanol stress that impacts membrane integrity. This cell death mainly occurs when grape musts processing reduces lipid availability, resulting in weaker membrane resistance to ethanol. However the mechanisms underlying cell death in these conditions remain unclear. We examined cell death occurrence considering yeast cells ability to elicit an appropriate response to a given nutrient limitation and thus survive starvation...
2017: PloS One
https://www.readbyqxmd.com/read/28921480/the-biodiversity-of-lactobacillus-spp-from-iranian-raw-milk-motal-cheese-and-antibacterial-evaluation-based-on-bacteriocin-encoding-genes
#19
Fahimeh Azizi, Mohammad B Habibi Najafi, Mohammad R Edalatian Dovom
Lactobacilli, as the largest group of lactic acid bacteria, produce large amounts of antimicrobial metabolites such as organic acids, fatty acids, ammonia, hydrogen peroxide, diacetyl and bacteriocin, which inhibit the growth of pathogenic bacteria and increase shelf life of food. The aim of this study was to identify the Lactobacillus spp. isolated from Iranian raw milk Motal cheese and to detect the presence of bacteriocin genes in the isolated Lactobacillus strains exhibiting antimicrobial activity. For this purpose, 6 Motal cheese samples from Dasht-e-Moghan region, Iran, were subjected to microbial characterization...
September 18, 2017: AMB Express
https://www.readbyqxmd.com/read/28921434/bioreactor-based-production-of-glycoproteins-in-plant-cell-suspension-cultures
#20
Tanja Holland, Johannes Felix Buyel
Recombinant glycoproteins such as monoclonal antibodies have a major impact on modern healthcare systems, e.g., as the active pharmaceutical ingredients in anticancer drugs. A specific glycan profile is often necessary to achieve certain desirable activities, such as the effector functions of an antibody, receptor binding or a sufficient serum half-life. However, many expression systems produce glycan profiles that differ substantially from the preferred form (usually the form found in humans) or produce a diverse array of glycans with a range of in vivo activities, thus necessitating laborious and costly separation and purification processes...
2018: Methods in Molecular Biology
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