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https://www.readbyqxmd.com/read/28532121/antimicrobial-activity-of-puffball-bovistella-radicata-and-separation-of-bioactive-compounds
#1
Yong Ye, Kun Liu, Qinghua Zeng, Qingmei Zeng
BACKGROUND: To test the antimicrobial activity of different extracts and fermentation broth from puffball(Bovistella radicata), the different extracts and fermentation broth of puffball were prepared, the active fraction was investigated by UPLC-UV-MS and semi-preparative chromatograph. RESULTS: Through zones of inhibition (ZOI) and minimum inhibitory concentrations (MIC) tests, the supernatant of fermentation possessed best antimicrobial activity in all extracts whose MIC value is 31...
December 2017: AMB Express
https://www.readbyqxmd.com/read/28531864/determination-of-volumetric-gas-liquid-mass-transfer-coefficient-of-carbon-monoxide-in-a-batch-cultivation-system-using-kinetic-simulations
#2
Nulee Jang, Muhammad Yasin, Shinyoung Park, Robert W Lovitt, In Seop Chang
A mathematical model of microbial kinetics was introduced to predict the overall volumetric gas-liquid mass transfer coefficient (kLa) of carbon monoxide (CO) in a batch cultivation system. The cell concentration (X), acetate concentration (Cace), headspace gas (Nco and [Formula: see text] ), dissolved CO concentration in the fermentation medium (Cco), and mass transfer rate (R) were simulated using a variety of kLa values. The simulated results showed excellent agreement with the experimental data for a kLa of 13/hr...
May 6, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28531849/heterotrophy-of-filamentous-oleaginous-microalgae-tribonema-minus-for-potential-production-of-lipid-and-palmitoleic-acid
#3
Wenjun Zhou, Hui Wang, Lin Chen, Wentao Cheng, Tianzhong Liu
Heterotrophic fermentation and high valuable co-product producing are thought to be effective ways to improve the economic viability and feasibility of commercial production of microalgae biofuels. This work reported the heterotrophic cultivation of Tribonema minus for lipid and palmitoleic acid (a novel functional fatty acid) production. Firstly, the heterotrophic ability of T. minus was identified for the first time with significant promotion in biomass and lipid productivity, and glucose and urea were then selected as the optimal carbon and nitrogen sources...
May 10, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28531830/isotope-coded-derivatization-based-lc-esi-ms-ms-methods-using-a-pair-of-novel-reagents-for-quantification-of-hydroxycinnamic-acids-and-hydroxybenzoic-acids-in-fermented-brown-rice-product
#4
Shoujiro Ogawa, Kiriko Takafuji, Sumi Tsubuku, Yukiko Horie, Shigeo Ikegawa, Tatsuya Higashi
Hydroxycinnamic acids (HCAs) and hydroxybenzoic acids (HBAs) are antioxidant phytochemicals found in rice and effective for the prevention of human diseases including cancer. FBRA, which is a functional food manufactured by fermenting brown rice and rice bran with Aspergillus oryzae, has been demonstrated to have chemopreventive effects against carcinogenesis in various organs. In this study, we developed methods for the relative and absolute quantification of ferulic acid, sinapic acid, caffeic acid, protocatechuic acid and syringic acid in the FBRA and raw material (RM; unfermented brown rice and rice bran) samples by LC/ESI-MS/MS combined with derivatization using a newly developed reagent, N-(2-aminoethyl)-4-(diethylamino)benzamide (ADB) and its deuterium-coded analog, d-ADB...
May 2, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28531784/gut-microbiota-mediated-benefits-of-barley-kernel-products-on-metabolism-gut-hormones-and-inflammatory-markers-as-affected-by-co-ingestion-of-commercially-available-probiotics-a-randomized-controlled-study-in-healthy-subjects
#5
Anne Nilsson, Elin Johansson-Boll, Jonna Sandberg, Inger Björck
BACKGROUND AND AIMS: Barley kernel based products have been shown to induce benefits on blood glucose regulation, cardio-metabolic risk markers and appetite regulating hormones in a time perspective of 11-16 h after intake. The mechanisms have been assigned to gut fermentation of indigestible carbohydrates. The purpose of the present study was to evaluate if the modulatory effects of barley on markers of metabolic- and appetite regulation are affected by a dietary background including a mixture of commercially available probiotics...
October 2016: Clinical Nutrition ESPEN
https://www.readbyqxmd.com/read/28531184/bacarena-individual-based-metabolic-modeling-of-heterogeneous-microbes-in-complex-communities
#6
Eugen Bauer, Johannes Zimmermann, Federico Baldini, Ines Thiele, Christoph Kaleta
Recent advances focusing on the metabolic interactions within and between cellular populations have emphasized the importance of microbial communities for human health. Constraint-based modeling, with flux balance analysis in particular, has been established as a key approach for studying microbial metabolism, whereas individual-based modeling has been commonly used to study complex dynamics between interacting organisms. In this study, we combine both techniques into the R package BacArena (https://cran.r-project...
May 22, 2017: PLoS Computational Biology
https://www.readbyqxmd.com/read/28531168/a-novel-millet-based-probiotic-fermented-food-for-the-developing-world
#7
Elisa Di Stefano, Jessica White, Shannon Seney, Sharareh Hekmat, Tim McDowell, Mark Sumarah, Gregor Reid
Probiotic yogurt, comprised of a Fiti sachet containing Lactobacillus rhamnosus GR-1 and Streptococcus thermophilus C106, has been used in the developing world, notably Africa, to alleviate malnutrition and disease. In sub-Saharan African countries, fermentation of cereals such as millet, is culturally significant. The aim of this study was to investigate the fermentation capability of millet when one gram of the Fiti sachet consortium was added. An increase of 1.8 and 1.4 log CFU/mL was observed for S. thermophilus C106 and L...
May 22, 2017: Nutrients
https://www.readbyqxmd.com/read/28530577/impact-of-apple-cultivar-ripening-stage-fermentation-type-and-yeast-strain-on-phenolic-composition-of-apple-ciders
#8
Oskar Laaksonen, Rain Kuldjärv, Toomas Paalme, Mira Virkki, Baoru Yang
Hydroxycinnamic acids and flavonoids in apple juices and ciders were studied using liquid chromatography. Samples were produced from four different Estonian apple cultivars using unripe, ripe and overripe apples, and six different commercial yeasts including Saccharomyces cerevisiae, Saccharomyces bayanus, and Torulaspora delbrueckii strains. Part of the samples was additionally inoculated with malolactic bacteria, Oenococcus oeni. The most notable difference among the samples was the appearance of phloretin in malolactic ciders in comparison to conventional ciders and the juices...
October 15, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28530573/identification-of-a-key-umami-active-fraction-in-modernized-korean-soy-sauce-and-the-impact-thereof-on-bitter-masking
#9
Yiseul Kim, Eun-Young Kim, Hee Jin Son, Jai-Jung Lee, Yong-Ho Choi, Mee-Ra Rhyu
Food protein hydrolysates created by natural fermentation have been used for centuries as food flavorings. The aim of this study was to define the key umami-active fraction of modernized Korean soy sauce (mJGN) and the impact thereof on bitter-masking of human sensory and bitter-taste receptor-expressing cells. We found strong correlations between taste profiles of mJGN and a contained fraction (F05). The latter contained compounds of less than 500Da, and elicits a distinct umami taste. Both free amino acids and Glu-enriched oligopeptides are suggested to be crucial in terms of the effects of F05 on taste...
October 15, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28530572/sensory-evaluation-of-boar-taint-containing-minced-meat-dry-cured-ham-and-dry-fermented-sausage-by-a-trained-expert-panel-and-consumers
#10
Kaat Verplanken, Jella Wauters, Vicky Vercruysse, Marijke Aluwé, Lynn Vanhaecke
One of the main issues related to entire male pigs is the occurrence of boar taint, an off-odour, which compromises meat consumability. In this study, odour thresholds (indole: 24-65µgkg(-1), skatole: 44-89µgkg(-1), androstenone: 121-342µgkg(-1)) for the boar taint compounds were estimated in minced meat, dry fermented sausage and dry-cured ham. Afterwards, sensory evaluation of these products containing 10% tainted meat (minced meat and dry fermented sausage) or moderate boar taint compound levels (dry-cured ham) occurred...
October 15, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28530192/preparation-structural-characterisation-and-release-study-of-novel-hybrid-microspheres-entrapping-nanoselenium-produced-by-green-synthesis
#11
Simona Cavalu, Jόszef Prokisch, Vasile Laslo, Simona Vicas
The main goal of this study was to synthesise and characterise different formulations based on alginate and alginate/chitosan microspheres containing nanoselenium (nano-Se) for controlled delivery applications. Nanosize elemental selenium was produced by using probiotic yogurt bacteria (Lactobacillus casei) in a fermentation procedure. The structural and morphological characterisation of the microspheres was performed by Fourier transform infrared (FTIR), X-ray diffraction (XRD) and scanning electron microscopy (SEM) analysis...
June 2017: IET Nanobiotechnology
https://www.readbyqxmd.com/read/28530096/engineering-eschericha-coli-for-enhanced-tyrosol-production
#12
Yuxiang Xue, Xianzhong Chen, Cui Yang, Junzhuang Chang, Wei Shen, You Fan
Tyrosol is a phenolic compound found in olive oil and wines. The health benefits of tyrosol have attracted considerable attention. Because the tyrosol extraction from plants poses a major obstacle, biosynthesizing this compound using microbial hosts is of interest. In this study, the phenylpyruvate decarboxylase gene ARO10 and the aromatic amino acid aminotransferase gene ARO8 were introduced into Escherichia coli to generate two recombinant tyrosol producers. Deleting the prephenate dehydratase pheA and the phenylacetaldehyde dehydrogenase gene feaB improved the tyrosol production...
May 22, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28529866/which-orthopaedic-patients-are-infected-with-gram-negative-non-fermenting-rods
#13
Omid Jamei, Shpresa Gjoni, Besa Zenelaj, Benjamin Kressmann, Wilson Belaieff, Didier Hannouche, Ilker Uçkay
Background : 1(st) and 2(nd) generation cephalosporins used for perioperative prophylaxis in orthopaedic surgery do not cover non-fermenting Gram-negative rods (NFR). Methods: Epidemiological cohort study of adult patients operated for orthopedic infections between 2004 and 2014 with perioperative cefuroxim or vancomycin prophylaxis. Exclusion of polyneuropathic ischemic foot infections and septic bursitis cases. Results: Of the total 1840 surgical procedures in the study, 430 grew Gram-negative pathogens (23%), of which 194 (11%) were due to NFR and 143 (8%) to Pseudomonas aeruginosa...
2017: J Bone Jt Infect
https://www.readbyqxmd.com/read/28529153/model-of-vascular-desmoplastic-multispecies-tumor-growth
#14
Chin F Ng, Hermann B Frieboes
We present a three-dimensional nonlinear tumor growth model composed of heterogeneous cell types in a multicomponent-multispecies system, including viable, dead, healthy host, and extra-cellular matrix (ECM) tissue species. The model includes the capability for abnormal ECM dynamics noted in tumor development, as exemplified by pancreatic ductal adenocarcinoma, including dense desmoplasia typically characterized by a significant increase of interstitial connective tissue. An elastic energy is implemented to provide elasticity to the connective tissue...
May 18, 2017: Journal of Theoretical Biology
https://www.readbyqxmd.com/read/28529041/treatment-of-supermarket-vegetable-wastes-to-be-used-as-alternative-substrates-in-bioprocesses
#15
Ana Isabel Díaz, Amanda Laca, Adriana Laca, Mario Díaz
Fruits and vegetables have the highest wastage rates at retail and consumer levels. These wastes have promising potential for being used as substrates in bioprocesses. However, an effective hydrolysis of carbohydrates that form these residues has to be developed before the biotransformation. In this work, vegetable wastes from supermarket (tomatoes, green peppers and potatoes) have been separately treated by acid, thermal and enzymatic hydrolysis processes in order to maximise the concentration of fermentable sugars in the final broth...
May 18, 2017: Waste Management
https://www.readbyqxmd.com/read/28529040/pre-treatment-technologies-for-dark-fermentative-hydrogen-production-current-advances-and-future-directions
#16
Razieh Rafieenia, Maria Cristina Lavagnolo, Alberto Pivato
Hydrogen is regarded as a clean and non-carbon fuel and it has a higher energy content compared to carbon fuels. Dark fermentative hydrogen production from organic wastes is the most promising technology for commercialization among chemical and biological methods. Using mixed microflora is favored in terms of easier process control and substrate conversion efficiencies instead of pure cultures. However, mixed cultures should be first pre-treated in order to select sporulating hydrogen producing bacteria and suppress non-spore forming hydrogen consumers...
May 18, 2017: Waste Management
https://www.readbyqxmd.com/read/28528973/antifungal-activities-of-secondary-metabolites-isolated-from-liquid-fermentations-of-stereum-hirsutum-sh134-11-against-botrytis-cinerea-grey-mould-agent
#17
Pedro Aqueveque, Carlos L Céspedes, José Becerra, Mario Aranda, Olov Sterner
Extracts obtained from liquid mycelial fermentations of the Chilean fungus Stereum hirsutum (Sh134-11) showed antifungal activity against Botrytis cinerea. Two types of extracts were obtained: EtOAc-extract (liquid phase) and MeOH-extract (mycelial phase). Plate diffusion assay showed that EtOAc-extracts were more active than MeOH-extracts. A large-scale fermentation of Sh134-11 and chromatographic methods allowed to isolated four compounds: MS-3, Vibralactone, Vibralactone B and Sterenin D. Only Sterenin D showed antifungal activity against B...
May 18, 2017: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/28528789/mixed-culture-h2-fermentation-performance-and-the-relation-between-microbial-community-composition-and-hydraulic-retention-times-for-a-fixed-bed-reactor-fed-with-galactose-glucose-mixtures
#18
Parthiban Anburajan, Jong-Hun Park, Periyasamy Sivagurunathan, Arivalagan Pugazhendhi, Gopalakrishnan Kumar, Chang-Su Choi, Sang-Hyoun Kim
This study examined the mesophilic continuous biohydrogen fermentation from galactose and glucose mixture with an initial substrate concentration of 15 g/L (galactose 12 g/L and glucose 3 g/L) as a resembling carbon source of pretreated red algal hydrolyzate. A fixed bed reactor was fed with the sugar mixture at various hydraulic retention times (HRTs) ranging 12 to 1.5 h. The maximum hydrogen production rate of 52.6 L/L-d was found at 2 h HRT, while the maximum hydrogen yield of 2.3±0.1 mol/mol hexoseadded, was achieved at 3 h HRT...
May 18, 2017: Journal of Bioscience and Bioengineering
https://www.readbyqxmd.com/read/28528783/revelation-and-cloning-of-valinomycin-synthetase-genes-in-streptomyces-lavendulae-acr-da1-and-their-expression-analysis-under-different-fermentation-and-elicitation-conditions
#19
Richa Sharma, Vijaylakshmi Jamwal, Varun P Singh, Priya Wazir, Praveen Awasthi, Deepika Singh, Sumit G Gandhi, Ram A Vishwakarma, Asha Chaubey
Streptomyces species are amongst the most exploited microorganisms due to their ability to produce a plethora of secondary metabolites with bioactive potential, including several well known drugs. They are endowed with immense unexplored potential and substantial efforts are required for their isolation as well as characterization for their bioactive potential. Unexplored niches and extreme environments are host to diverse microbial species. In this study, we report Streptomyces lavendulae ACR-DA1, isolated from extreme cold deserts of the North Western Himalayas, which produces a macrolactone antibiotic, valinomycin...
May 18, 2017: Journal of Biotechnology
https://www.readbyqxmd.com/read/28528384/effects-of-salts-contained-in-lignocellulose-derived-sugar-streams-on-microbial-lipid-production
#20
Zhu Chen, Caixia Wan
This study aimed at developing low-cost, robust non-sterile fermentation processes for microbial lipid production from lignocellulose-derived sugars. Three representative oleaginous yeasts, Lipomyces tetrasporus (NRRL Y-11562), Rhodotorula toruloides (NRRL Y-1091), and Yarrowia lipolytica (NRRL YB-437), were tested for lipid production via non-sterile fermentation. Under optimal non-sterile conditions, all the tested strains had good performance on salt tolerance and lipid production. L. tetrasporus (NRRL Y-11562) gave the highest lipid titer of 12...
May 20, 2017: Applied Biochemistry and Biotechnology
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