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https://www.readbyqxmd.com/read/28527125/diversity-and-probiotic-potential-of-lactic-acid-bacteria-isolated-from-horreh-a-traditional-iranian-fermented-food
#1
Alireza Vasiee, Behrooz Alizadeh Behbahani, Farideh Tabatabaei Yazdi, Seyed Ali Mortazavi, Hamid Noorbakhsh
The aim of this study was to evaluate the probiotic potential of lactic acid bacteria (LAB) strains isolated from Horreh. Some probiotic properties, e.g., resistance to acid, bile tolerance, antibacterial activity, and antibiotic susceptibility, were investigated. A total of 140 Gram-positive and catalase-negative isolates from Horreh were subjected to identification and grouping by cultural methods and the 16S rRNA sequencing. The new isolates were identified to be Lactobacillus (fermentum, plantarum, and brevis) Weissella cibaria, Enterococcus (faecium and faecalis), Leuconostoc (citreum and mesenteroides subsp...
May 19, 2017: Probiotics and Antimicrobial Proteins
https://www.readbyqxmd.com/read/28525953/human-yeast-hybrids-new-visions-to-genetic-disorders-and-drug-discovery
#2
Najmeh Zarei, Vahid Khalaj
Yeast has been a very helpful organism for centuries, especially with respect to fermentation of sugars and production of bread. However, for an even longer time, yeast has been a distant relative of humans having diverged from a common ancestor, about one billion years ago. More than one third of the yeast genes have human counterparts, despite this evolutionary distance. Yeast and human orthologs perform the same or similar functions. Investigations have demonstrated that 9-92% of the amino acid sequences in similar human and yeast proteins overlap...
July 2017: Iranian Biomedical Journal
https://www.readbyqxmd.com/read/28525543/fermentable-carbohydrates-fodmaps-exacerbate-functional-gastrointestinal-symptoms-in-patients-with-inflammatory-bowel-disease-a-randomised-double-blind-placebo-controlled-cross-over-re-challenge-trial
#3
Selina R Cox, Alexis C Prince, Clio E Myers, Peter M Irving, James O Lindsay, Miranda C Lomer, Kevin Whelan
Background and Aims: Preliminary evidence suggests fermentable carbohydrate restriction might ameliorate functional gastrointestinal symptoms (FGS) in quiescent inflammatory bowel disease (IBD). Our aim was to determine whether fermentable carbohydrates exacerbate FGS in quiescent IBD using a randomised, double-blinded, placebo-controlled, cross-over, re-challenge trial. Methods: Patients with quiescent IBD and FGS responsive to a low FODMAP diet were allocated to a series of 3-day fermentable carbohydrate challenges in random order (fructan, 12 g/d; galacto-oligosaccharides, GOS, 6 g/d; sorbitol, 6 g/d; and glucose placebo, 12 g/d), each separated by a standardised washout period...
May 19, 2017: Journal of Crohn's & Colitis
https://www.readbyqxmd.com/read/28524037/-clinical-analysis-of-53-patients-with-clostridium-botulinum-food-poisoning
#4
Peng Zhang, Jianguang Dong, Lili Bai, Zewu Qiu
OBJECTIVE: To analyze the epidemiologic data of patients with Clostridium botulinum food poisoning, and to improve the understanding, diagnosis and treatment of food borne botulism. METHODS: A retrospective study was conducted. Fifty-three patients with Clostridium botulinum food poisoning admitted to Chinese PLA Center of Poisoning and Treatment from January 2009 to December 2016 were enrolled, and they were divided into mild, moderate, and severe groups according to the severity of disease...
May 2017: Zhonghua Wei Zhong Bing Ji Jiu Yi Xue
https://www.readbyqxmd.com/read/28523377/mining-lipolytic-enzymes-in-community-dna-from-high-andean-soils-using-a-targeted-approach
#5
Daniel Borda-Molina, José Salvador Montaña, María Mercedes Zambrano, Sandra Baena
Microbial enrichments cultures are a useful strategy to speed up the search for enzymes that can be employed in industrial processes. Lipases have gained special attention because they show unique properties such as: broad substrate specificity, enantio- and regio-selectivity and stability in organic solvents. A major goal is to identify novel lipolytic enzymes from microorganisms living in cold extreme environments such as high Andean soils, of relevance to our study being their capability be used in industrial processes...
May 18, 2017: Antonie Van Leeuwenhoek
https://www.readbyqxmd.com/read/28523288/extracellular-xylanopectinolytic-enzymes-by-bacillus-subtilis-adi1-from-efb-s-compost
#6
Muhammad Hariadi Nawawi, Rosfarizan Mohamad, Paridah Md Tahir, Wan Zuhainis Saad
Microbial xylanase and pectinase are two extremely valuable enzymes, which have captivated much attention. This can be seen from the increased demand for these enzymes by many industrial sectors. This study investigates the isolation and screening of extracellular xylanopectinolytic enzymes-producing bacteria in a submerged fermentation (SmF). Samples are collected from the compost of empty fruit bunch (EFB) at Biocompost Pilot Plant, located at Biorefinery Plant, Universiti Putra Malaysia. From the experiment, out of 20 isolates, 11 isolates show xylanase or/and pectinase activity, and only one isolate (EFB-11) shows the concurrent activities of xylanase and pectinase...
2017: International Scholarly Research Notices
https://www.readbyqxmd.com/read/28522999/fermentation-ph-modulates-the-size-distributions-and-functional-properties-of-gluconobacter-albidus-tmw-2-1191-levan
#7
Tharalinee Ua-Arak, Frank Jakob, Rudi F Vogel
Bacterial levan has gained an increasing interest over the last decades due to its unique characteristics and multiple possible applications. Levan and other exopolysaccharides (EPSs) production are usually optimized to obtain the highest concentration or yield while a possible change of the molecular size and mass during the production process is mostly neglected. In this study, the molar mass and radius of levan samples were monitored during fermentations with the food-grade, levan-producing acetic acid bacterium Gluconobacter (G...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28522998/genetic-polymorphism-in-wine-yeasts-mechanisms-and-methods-for-its-detection
#8
REVIEW
José M Guillamón, Eladio Barrio
The processes of yeast selection for using as wine fermentation starters have revealed a great phenotypic diversity both at interspecific and intraspecific level, which is explained by a corresponding genetic variation among different yeast isolates. Thus, the mechanisms involved in promoting these genetic changes are the main engine generating yeast biodiversity. Currently, an important task to understand biodiversity, population structure and evolutionary history of wine yeasts is the study of the molecular mechanisms involved in yeast adaptation to wine fermentation, and on remodeling the genomic features of wine yeast, unconsciously selected since the advent of winemaking...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28522863/effects-of-replacing-leymus-chinensis-with-whole-crop-wheat-hay-on-holstein-bull-apparent-digestibility-plasma-parameters-rumen-fermentation-and-microbiota
#9
Wenjing Niu, Yang He, Chuanqi Xia, Muhammad Aziz Ur Rahman, Qinghua Qiu, Taoqi Shao, Yixun Liang, Linbao Ji, Haibo Wang, Binghai Cao
Twelve Holstein bulls were used in a 4 × 4 Latin square design to investigate the effects of using whole-crop wheat hay (WCWH) as a substitute for Leymus chinensis (LC) on apparent digestibility, plasma parameters, ruminal fermentation, and microbial communities. Experimental treatments were four proportions of WCWH, 0, 33, 67, and 100%, as a substitute for LC (WCWH0, WCWH33, WCWH67, and WCWH100, respectively). The WCWH100 group showed a higher nutritional intake of crude protein (CP) and higher apparent digestibility of organic matter (OM), CP, and ether extract (EE) than the WCWH0 group (P < 0...
May 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28522720/first-insight-into-the-genome-sequence-of-clostridium-thermobutyricum-dsm-4928-a-butyrate-producing-moderate-thermophile
#10
Anja Poehlein, Abirami Anbalagan, Alexandra Nagel, Rolf Daniel
The moderately thermophilic and Gram-positive bacterium Clostridium thermobutyricum is strictly anaerobic and forms subterminally located endospores. It was isolated from horse manure compost. C. thermobutyricum produces butyrate as the main fermentation product. The draft genome consists of one circular chromosome (3.425 Mb) and contains 3,201 predicted protein-coding genes.
May 18, 2017: Genome Announcements
https://www.readbyqxmd.com/read/28522716/first-insights-into-the-genome-sequence-of-the-cellulolytic-bacterium-clostridium-hungatei-dsm-14427
#11
Anja Poehlein, Katrina Funkner, Miriam A Schüler, Rolf Daniel
Clostridium hungatei is an obligate anaerobic and spore-forming bacterium, which was isolated from soil. It ferments carbohydrates, such as cellulose or d-glucose. C. hungatei is able to fix nitrogen. The draft genome consists of 1 chromosome (4.902 Mb) with 4,246 predicted protein-coding genes.
May 18, 2017: Genome Announcements
https://www.readbyqxmd.com/read/28522710/draft-genome-sequences-of-the-xylose-fermenting-yeast-scheffersomyces-shehatae-nbrc-1983-t-and-a-thermotolerant-isolate-of-s-%C3%A2-shehatae-aty839-jcm-18690
#12
Natsumi Okada, Ayumi Tanimura, Hideki Hirakawa, Masako Takashima, Jun Ogawa, Jun Shima
Draft genome sequences of the type strain (NBRC 1983) and a thermotolerant isolate (ATY839) of the xylose-fermenting yeast Scheffersomyces shehatae were determined. The genome sizes and presumed open reading frames were highly similar between strains NBRC 1983(T) and ATY839.
May 18, 2017: Genome Announcements
https://www.readbyqxmd.com/read/28522417/physiological-responses-of-insects-to-microbial-fermentation-products-insights-from-the-interactions-between-drosophila-and-acetic-acid
#13
Geonho Kim, Jia Hsin Huang, John G McMullen, Peter D Newell, Angela E Douglas
Acetic acid is a fermentation product of many microorganisms, including some that inhabit the food and guts of Drosophila. Here, we investigated the effect of dietary acetic acid on oviposition and larval performance of Drosophila. At all concentrations tested (0.34-3.4%), acetic acid promoted egg deposition by mated females in no-choice assays; and females preferred to oviposit on diet with acetic acid relative to acetic acid-free diet. However, acetic acid depressed larval performance, particularly extending the development time of both larvae colonized with the bacterium Acetobacter pomorum and axenic (microbe-free) larvae...
May 15, 2017: Journal of Insect Physiology
https://www.readbyqxmd.com/read/28522202/a-new-metabolic-route-for-the-fermentative-production-of-5-aminovalerate-from-glucose-and-alternative-carbon-sources
#14
João M P Jorge, Fernando Pérez-García, Volker F Wendisch
Here, a new metabolic pathway for the production of 5-aminovalerate (5AVA) from l-lysine via cadaverine as intermediate was established and this three-step-pathway comprises l-lysine decarboxylase (LdcC), putrescine transaminase (PatA) and γ-aminobutyraldehyde dehydrogenase (PatD). Since Corynebacterium glutamicum is used for industrial l-lysine production, the pathway was established in this bacterium. Upon expression of ldcC, patA and patD from Escherichia coli in C. glutamicum wild type, production 5AVA was achieved...
April 29, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28522200/biological-disintegration-of-microalgae-for-biomethane-recovery-prediction-of-biodegradability-and-computation-of-energy-balance
#15
S Kavitha, R Yukesh Kannah, J Rajesh Banu, S Kaliappan, M Johnson
The present study investigates the synergistic effect of combined bacterial disintegration on mixed microalgal biomass for energy efficient biomethane generation. The rate of microalgal biomass lysis, enhanced biodegradability, and methane generation were used as indices to assess efficiency of the disintegration. A maximal dissolvable organics release and algal biomass lysis rate of about 1100, 950 and 800mg/L and 26, 23 and 18% was achieved in PA+C (protease, amylase+cellulase secreting bacteria), C (cellulase alone) and PA (protease, amylase) microalgal disintegration...
May 4, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28521538/correction-to-raninen-lappi-kolehmainen-kolehmainen-mykk%C3%A3-nen-poutanen-and-raatikainen-diet-derived-changes-by-sourdough-fermented-rye-bread-in-exhaled-breath-aspiration-ion-mobility-spectrometry-profiles-in-individuals-with-mild-gastrointestinal-symptoms
#16
https://www.readbyqxmd.com/read/28521235/integrated-bioconversion-of-syngas-into-bioethanol-and-biopolymers
#17
Borja Lagoa-Costa, Haris Nalakath Abubackar, María Fernández-Romasanta, Christian Kennes, María C Veiga
Syngas bioconversion is a promising method for bioethanol production, but some VFA remains at the end of fermentation. A two-stage process was set-up, including syngas fermentation as first stage under strict anaerobic conditions using C. autoethanogenum as inoculum, with syngas (CO/CO2/H2/N2, 30/10/20/40) as gaseous substrate. The second stage consisted in various fed-batch assays using a highly enriched PHA accumulating biomass as inoculum, where the potential for biopolymer production from the remaining acetic acid at the end of the syngas fermentation was evaluated...
May 5, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28521234/enhanced-alcohol-titre-and-ratio-in-carbon-monoxide-rich-off-gas-fermentation-of-clostridium-carboxidivorans-through-combination-of-trace-metals-optimization-with-variable-temperature-cultivation
#18
Shaohuang Shen, Yang Gu, Changsheng Chai, Weihong Jiang, Yingping Zhuang, Yonghong Wang
Bioconversion of C1 gases to produce chemicals has good application prospects. Here, the combination of trace metals optimization using a statistical method with variable-temperature cultivation was used to enhance alcohol synthesis during CO-rich off-gas fermentation by Clostridium carboxidivorans P7. Based on ATCC medium 1754, the optimum concentration of the trace metals was found to be 5-fold Ni(2+), Co(2+), SeO4(2+), and WO4(2+); 3.48-fold Cu(2+); 0.55-fold MoO4(2+); 0.5-fold Zn(2+) and (NH4)2SO4·FeSO4·6H2O; and additional 44...
April 27, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28521229/development-of-jerusalem-artichoke-resource-for-efficient-one-step-fermentation-of-poly-%C3%AE-glutamic-acid-using-a-novel-strain-bacillus-amyloliquefaciens-nx-2s
#19
Yibin Qiu, Yuanyuan Sha, Yatao Zhang, Zongqi Xu, Sha Li, Peng Lei, Zheng Xu, Xiaohai Feng, Hong Xu
This study aimed to develop non-food fermentation for the cost-effective production of poly-(γ-glutamic acid) (γ-PGA) using a novel strain of Bacillus amyloliquefaciens NX-2S. The new isolate assimilated inulin more efficiently than other carbohydrates from Jerusalem artichoke, without hydrolytic treatment. To investigate the effect of inulin on γ-PGA production, the transcript levels of γ-PGA synthetase genes (pgsB, pgsC, pgsA), regulatory genes (comA, degQ, degS), and the glutamic acid biosynthesis gene (glnA) were analyzed; inulin addition upregulated these key genes...
May 4, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28521209/use-of-solid-digestate-for-lignocellulolytic-enzymes-production-through-submerged-fungal-fermentation
#20
Alida Musatti, Elena Ficara, Chiara Mapelli, Cecilia Sambusiti, Manuela Rollini
Studies were performed on the use of the solid fraction of digestate (D) for the production of lignocellulolytic enzymes (endo- and exo-glucanase, xylanase, β-glucosidase and laccase) by fungi, in comparison with wheat straw (benchmark) (W). To date, this is the first report on the use of such an inexpensive substrate in a liquid environment. Submerged instead of solid state fermentation was applied to overcome pH inhibition and increase surface accessibility. A total of 21 fungal strains were tested: the most performing ones were Irpex lacteus DSM1183 for both β-glucosidase (52 IU/g with D, + 400% compared to W) and endo-glucanase (236 IU/g with D, + 470% compared to W), Schizophyllum commune CBS30132 for xylanase (715 IU/g with W, + 145% compared to D) and Pleurotus ostreatus ATCC96997 for laccase (124 IU/g with D, +230% compared to D)...
May 15, 2017: Journal of Environmental Management
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