keyword
MENU ▼
Read by QxMD icon Read
search

fermentation

keyword
https://www.readbyqxmd.com/read/28817926/yeast-multistress-resistance-and-lag-phase-characterisation-during-wine-fermentation
#1
David Ferreira, Virginie Galeote, Isabelle Sanchez, Jean-Luc Legras, Anne Ortiz-Julien, Sylvie Dequin
Saccharomyces cerevisiae has been used to perform wine fermentation for several millennia due to its endurance and unmatched qualities. Nevertheless, at the moment of inoculation, wine yeasts must cope with specific stress factors that still challenge wine makers by slowing down or compromising the fermentation process. To better assess the role of genetic and environmental factors that govern multistress resistance during the wine fermentation lag phase, we used a factorial plan to characterise the individual and combined impact of relevant stress factors on eight S...
September 1, 2017: FEMS Yeast Research
https://www.readbyqxmd.com/read/28817657/metaproteomics-analysis-of-the-functional-insights-into-microbial-communities-of-combined-hydrogen-and-methane-production-by-anaerobic-fermentation-from-reed-straw
#2
Xuan Jia, Bei-Dou Xi, Ming-Xiao Li, Yang Yang, Yong Wang
A metaproteomic approach was used to analyse the proteins expressed and provide functional evidence of key metabolic pathways in the combined production of hydrogen and methane by anaerobic fermentation (CHMP-AF) for reed straw utilisation. The functions and structures of bacteria and archaea populations show significant succession in the CHMP-AF process. There are many kinds of bacterial functional proteins, mainly belonging to phyla Firmicutes, Proteobacteria, Actinobacteria and Bacteroidetes, that are involved in carbohydrate metabolism, energy metabolism, lipid metabolism, and amino acid metabolism...
2017: PloS One
https://www.readbyqxmd.com/read/28816626/comparison-of-the-elution-characteristics-of-individual-forms-of-lovastatin-in-both-isocratic-and-gradient-modes-and-hplc-pda-method-development-for-pure-and-fermentation-derived-lovastatin
#3
Seenivasan Ayothiraman, Sathyanarayana N Gummadi, Tapobrata Panda
The elution characteristics of lovastatin were studied on varying the composition of mobile phase in both isocratic and gradient elution modes to comprehend the role of organic modifier and acidifier on the overall analysis time and retention time of individual forms of lovastatin. Acetonitrile has influenced on the overall analysis time, whereas the acidifier determines the retention time of hydroxy acid form of lovastatin and the retention time gap between the individual forms. A combination of acetonitrile and 0...
August 17, 2017: Preparative Biochemistry & Biotechnology
https://www.readbyqxmd.com/read/28816611/biosynthesis-regulation-of-natamycin-production-from-streptomyces-natalensis-hdmnte-01-enhanced-by-response-surface-methodology
#4
Jingping Ge, Changli Wang, Shoufeng Huang, Renpeng Du, Kun Liu, Gang Song, Wenxiang Ping
Natamycin has been widely applied in medical treatments and food protection widely due to its effective inhibition to the growth of yeast and mold. As polyene macrolide antibiotic, the biosynthesis pathway of natamycin is relatively clear. To regulate the biosynthesis of natamycin, additions of precursors affecting cell growth and natamycin production were investigated. The results showed that 0.003% (w/v) potassium ferrocyanide and sodium propionate: n-butanol at a ratio of 4:1 was added into the broth at 0 h and 24 h respectively and they contributed to yield natamycin, reaching 1...
August 17, 2017: Preparative Biochemistry & Biotechnology
https://www.readbyqxmd.com/read/28816606/scale-up-of-puf-immobilized-fungal-chitosanase-lipase-preparation-production
#5
Katarzyna Struszczyk-Świta, Łukasz Stańczyk, Mirosława Szczęsna-Antczak, Tadeusz Antczak
Mucor circinelloides IBT-83 mycelium that exhibits both lipolytic (AL) and chitosanolytic (ACH) activities was immobilized into polyurethane foam (PUF) in a 30 L laboratory fermenter. The process of immobilization was investigated in terms of: the carrier porosity, its type, amount and shape, location inside the fermenter, mixing and aeration parameters during the culture, as well as downstream processing operations. The selected conditions allowed for immobilization of approx. 7 g of defatted and dried mycelium in 1 g of carrier, i...
August 17, 2017: Preparative Biochemistry & Biotechnology
https://www.readbyqxmd.com/read/28816527/use-of-whey-as-a-culture-medium-for-bacillus-clausii-for-the-production-of-protein-hydrolysates-with-antimicrobial-and-antioxidant-activity
#6
Jesús J Rochín-Medina, Hilda K Ramírez-Medina, Jesús G Rangel-Peraza, Karen V Pineda-Hidalgo, Pablo Iribe-Arellano
The use of whey as a natural culture medium to produce hydrolysates with antimicrobial from Bacillus clausii is the objective of this research. The fermentation process was carried out at 25 ℃ for five days, where proteolytic activity, soluble peptides quantification, and antimicrobial activity using the disc diffusion method were determined every day. The fermented whey reached values ​​of proteolytic activity between 90 and 260 U ml(-1) and a production of soluble peptides between 100 and 2070 µg ml(-1)...
January 1, 2017: Food Science and Technology International, Ciencia y Tecnología de Los Alimentos Internacional
https://www.readbyqxmd.com/read/28815819/novel-consortium-of-klebsiella-variicola-and-lactobacillus-species-enhances-the-functional-potential-of-fermented-dairy-products-by-increasing-the-availability-of-branched-chain-amino-acids-and-the-amount-of-distinctive-volatiles
#7
H Rosales-Bravo, H C Morales-Torres, J Vázquez-Martínez, J Molina-Torres, V Olalde-Portugal, L P Partida-Martínez
AIMS: Identify novel bacterial taxa that could increase the availability of branched-chain amino acids and the amount of distinctive volatiles during skim milk fermentation. METHODS AND RESULTS: We recovered 344 bacterial isolates from stool samples of healthy and breastfed infants. Five were selected based on their ability to produce branched-chain amino acids. Three strains were identified as Escherichia coli, one as Klebsiella pneumoniae and other as Klebsiella variicola by molecular and biochemical methods...
August 17, 2017: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/28813780/microbial-diversity-of-commercial-makgeolli-and-its-influence-on-the-organoleptic-characteristics-of-korean-rice-sourdough-jeung-pyun
#8
Jaehyung Park, Ji Sun Seo, Seul-Ah Kim, So-Yeon Shin, Jong-Hyun Park, Nam Soo Han
Sourdough is made by fermentation of dough by lactic acid bacteria (LAB) and yeast to improve bread properties like volume, flavor, and texture. A Korean traditional sourdough was made by fermenting rice flour with rice wine (makgeolli) and used to make sponge-like bread (Jeung-pyun). The aim of this study was to investigate the microbial diversity of makgeolli products and their influence on the organoleptic quality of Jeung-pyun. Three commercial makgeolli were tested for Jeung-pyun production, with each product exhibiting varied dough swelling rates and organoleptic qualities, and among them, J-product was ranked highest in texture and taste...
August 17, 2017: Journal of Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28813779/dna-profiling-of-leuconostoc-citreum-strains-in-fermented-foods-by-repetitive-element-polymerase-chain-reaction
#9
Jasmine Kaur, Anshul Sharma, Sulhee Lee, Young-Seo Park
To identify and discriminate the bacterial species at the sub-specific level, rep-PCR method is a reliable genomic fingerprinting tool. Fourteen strains of bacteria were isolated from different food sources, identified as Leuconostoc citreum using 16S rRNA gene sequencing and amplified using rep-primers (REP, ERIC, and (GTG)5). Fingerprinting patterns generated band range in between 300-6000 bp with REP, 150-6000bp with ERIC and 200-1700 bp with (GTG)5 primers respectively. In UPGMA dendrogram analysis, 14 strains were clustered into three clades (I, II and III) with all the primers, thus differentiating them at the molecular level...
August 17, 2017: Journal of Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28813471/mitochondrial-genome-evolution-in-the-saccharomyces-sensu-stricto-complex
#10
Jiangxing Ruan, Jian Cheng, Tongcun Zhang, Huifeng Jiang
Exploring the evolutionary patterns of mitochondrial genomes is important for our understanding of the Saccharomyces sensu stricto (SSS) group, which is a model system for genomic evolution and ecological analysis. In this study, we first obtained the complete mitochondrial sequences of two important species, Saccharomyces mikatae and Saccharomyces kudriavzevii. We then compared the mitochondrial genomes in the SSS group with those of close relatives, and found that the non-coding regions evolved rapidly, including dramatic expansion of intergenic regions, fast evolution of introns and almost 20-fold higher rearrangement rates than those of the nuclear genomes...
2017: PloS One
https://www.readbyqxmd.com/read/28812308/transcriptional-regulation-of-the-protein-kinase-a-subunits-in-saccharomyces-cerevisiae-during-fermentative-growth
#11
Fiorella Galello, Constanza Pautasso, Sol Reca, Luciana Cañonero, Paula Portela, Silvia Moreno, Silvia Rossi
Yeast cells can adapt their growth in response to the nutritional environment. Glucose is the favorite carbon source of Saccharomyces cerevisiae that prefers a fermentative metabolism despite the presence of oxygen. When glucose is consumed, the cell switches to the aerobic metabolism of ethanol, during the so-called diauxic shift. The difference between fermentative and aerobic growth is in part mediated by a regulatory mechanism called glucose repression. During glucose derepression a profound gene transcriptional reprogramming occurs and genes involved in the utilization of alternative carbon sources are expressed...
August 15, 2017: Yeast
https://www.readbyqxmd.com/read/28811799/diversity-physiochemical-and-phylogenetic-analyses-of-bacteria-isolated-from-various-drinking-water-sources
#12
Neveen H Eid, Huda A Al Doghaither, Taha A Kumosani, Munazza Gull
OBJECTIVE: To evaluate the indigenous bacterial strains of drinking water from the most commercial water types including bottled and filtered water that are currently used in Saudi Arabia. METHODS: Thirty randomly selected commercial brands of bottled water were purchased from Saudi local markets. Moreover, samples from tap water and filtered water were collected in sterilized glass bottles and stored at 4°C. Biochemical analyses including pH, temperature, lactose fermentation test (LAC), indole test (IND), methyl red test (MR), Voges-Proskauer test (VP), urease test (URE), catalase test (CAT), aerobic and anaerobic test (Ae/An) were measured...
May 2017: Pakistan Journal of Medical Sciences Quarterly
https://www.readbyqxmd.com/read/28811620/a-new-anthracycline-type-metabolite-from-streptomyces-sp-neau-l3
#13
Chang Lu, Yue Zhao, Wei-Qi Jia, Hui Zhang, Huan Qi, Wen-Sheng Xiang, Ji-Dong Wang, Xiang-Jing Wang
A new anthracycline-type metabolite, designated as tetracenoquinocin A (1), was isolated from the fermentation broth of Streptomyces sp. NEAU-L3. Its structure was determined on the basis of spectroscopic analysis, including 1D and 2D NMR techniques as well as ESI-MS and comparison with data from the literature. Compound 1 showed potent cytotoxic activity against three cancer cell lines (HepG2, A549, HCT-116) with IC50 values of 5.57, 24.30 and 20.82 μM, respectively.The Journal of Antibiotics advance online publication, 16 August 2017; doi:10...
August 16, 2017: Journal of Antibiotics
https://www.readbyqxmd.com/read/28811339/heritable-bovine-rumen-bacteria-are-phylogenetically-related-and-correlated-with-the-cow-s-capacity-to-harvest-energy-from-its-feed
#14
Goor Sasson, Sheerli Kruger Ben-Shabat, Eyal Seroussi, Adi Doron-Faigenboim, Naama Shterzer, Shamay Yaacoby, Margret E Berg Miller, Bryan A White, Eran Halperin, Itzhak Mizrahi
Ruminants sustain a long-lasting obligatory relationship with their rumen microbiome dating back 50 million years. In this unique host-microbiome relationship, the host's ability to digest its feed is completely dependent on its coevolved microbiome. This extraordinary alliance raises questions regarding the dependent relationship between ruminants' genetics and physiology and the rumen microbiome structure, composition, and metabolism. To elucidate this relationship, we examined the association of host genetics with the phylogenetic and functional composition of the rumen microbiome...
August 15, 2017: MBio
https://www.readbyqxmd.com/read/28811221/is-the-hype-around-the-reproductive-health-claims-of-maca-lepidium-meyenii-walp-justified
#15
REVIEW
Shruti Beharry, Michael Heinrich
ETHNOPHARMACOLOGICAL RELEVANCE: Maca - Lepidium meyenii Walp has been cultivated and used by Andean people for over 1,300 to 2000 years in Peru as food and medicine. Starting in the late 1990's it has developed into an important herbal medicine in China and is now cultivated there widely, too. AIM OF STUDY: This study aims to provide an insight into the emergence of maca on the global market as an alternative remedy to treat reproductive health related problems in both men and women and to critically assess these health claims...
August 12, 2017: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/28811204/heterologous-expression-and-biochemical-characterization-of-a-novel-thermostable-sclerotinia-sclerotiorum-gh45-endoglucanase-in-pichia-pastoris
#16
Haifa Chahed, Mohamed Boumaiza, Aymen Ezzine, M Nejib Marzouki
Enzymatic saccharification of lignocellulosic biomass has been widely studied. Mainly endoglucanases were found to be a prerequisite for the quick initial biomass liquefaction. In the present study, Pichia pastoris was used as a host for the heterologous expression of a Sclerotinia sclerotiorum GH45 endoglucanase, Endo2. The recombinant plasmid pPICZαA was used to transform Pichia pastoris. Pichia culture supernatants expressing the recombinant Endo2 (rEndo2) were used for the purification and biochemical characterization of this enzyme...
August 12, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28811162/engineering-peptidoglycan-degradation-related-genes-of-bacillus-subtilis-for-better-fermentation-processes
#17
Liang Zhao, Jianwen Ye, Jing Fu, Guo-Qiang Chen
In this study, Bacillus subtilis 168 Δupp was engineered to change the bacterial shapes. Namely, some peptidoglycan hydrolase related genes were inactivated individually or in different combinations, including sigD, lytE, lytF, lytC, lytD and lytG. Inactivations of these genes resulted in various intensities of blockages on cell division, leading to elongation of bacterial cells. The resulted fiber phenotypes showed different lengths ranging from tens of microns to several millimeters. Mutants with multiple gene inactivations such as ΔsigDΔlytEΔlytD showed more easily precipitated phenomenon, obviously increased growth rate, more sensitive to antibiotics and improved α-amylase production compared with that of B...
June 23, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28811148/metagenomes-from-deep-baltic-sea-sediments-reveal-how-past-and-present-environmental-conditions-determine-microbial-community-composition
#18
Ian P G Marshall, Søren M Karst, Per H Nielsen, Bo Barker Jørgensen
Microbial communities that lived near the sediment surface in the past become slowly buried and are the source of deep subsurface communities thousands of years later. We used metagenomes to analyse how the composition of buried microbial communities may change to conform to altered environmental conditions at depth. Sediment samples were collected from down to 85m below sea floor during the Integrated Ocean Drilling Program Expedition 347, "Baltic Sea Paleoenvironment". The sediments vary in age, organic carbon content, porewater salinity, and other parameters that reflect the changing Baltic environment from the last ice age and throughout the Holocene...
August 12, 2017: Marine Genomics
https://www.readbyqxmd.com/read/28810801/may-dietary-supplementation-augment-respiratory-burst-in-wound-site-inflammatory-cells
#19
Amitava Das, Ryan Dickerson, Piya Das Ghatak, Gayle Gordillo, Scott Chaffee, Abhijoy Saha, Savita Khanna, Sashwati Roy
Persistent infection contributes to wound chronicity. At the wound-site, NADPH oxidase activity in immune cells fights infection to enable the healing process. Fermented Papaya Preparation (FPP) is a carbohydrate-rich nutritional supplement that has demonstrated ability to bolster respiratory burst in experimental rodent systems. In FPP, glucose co-exists with fructose and maltose in addition to multiple other sugar alcohols such as inositol. We have previously reported that FPP supplementation augments wound healing in diabetic mice via improvement of respiratory-burst activity of wound innate immune cells...
August 16, 2017: Antioxidants & Redox Signaling
https://www.readbyqxmd.com/read/28810703/exploring-the-potential-of-saccharomyces-eubayanus-as-a-parent-for-new-interspecies-hybrid-strains-in-winemaking
#20
Frederico Magalhães, Kristoffer Krogerus, Sandra Castillo, Anne Ortiz-Julien, Sylvie Dequin, Brian Gibson
Yeast cryotolerance brings some advantages for wine fermentations, including the improved aromatic complexity of white wines. Naturally cold-tolerant strains are generally less adept at wine fermentation but fermentative fitness can potentially be improved through hybridization. Here we studied the potential of using hybrids involving Saccharomyces eubayanus and a S. cerevisiae wine strain for low-temperature winemaking. Through screening the performance in response to variable concentrations of sugar, nitrogen and temperature, we isolated one hybrid strain that exhibited the superior performance...
August 1, 2017: FEMS Yeast Research
keyword
keyword
19395
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"