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https://www.readbyqxmd.com/read/28634326/a-chrysoporthe-cubensis-enzyme-cocktail-produced-from-a-low-cost-carbon-source-with-high-biomass-hydrolysis-efficiency
#1
Thiago Rodrigues Dutra, Valéria Monteze Guimarães, Ednilson Mascarenhas Varela, Lílian da Silva Fialho, Adriane Maria Ferreira Milagres, Daniel Luciano Falkoski, José Cola Zanuncio, Sebastião Tavares de Rezende
Low cost and high efficiency cellulolytic cocktails can consolidate lignocellulosic ethanol technologies. Sugarcane bagasse (SCB) is a low cost agro-industrial residue, and its use as a carbon source can reduce the costs of fungi cultivation for enzyme production. Chrysoporthe cubensis grown under solid state fermentation (SSF) with wheat bran has potential to produce efficient enzymatic extracts for SCB saccharification. This fungus was grown under submersed fermentation (SmF) and SSF with in natura SCB, pretreated with acid or alkali and with others carbon sources...
June 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28633643/enhancement-of-thermoalkaliphilic-xylanase-production-by-pichia-pastoris-through-novel-fed-batch-strategy-in-high-cell-density-fermentation
#2
Tingting Shang, Dayong Si, Dongyan Zhang, Xuhui Liu, Longmei Zhao, Cong Hu, Yu Fu, Rijun Zhang
BACKGROUND: Xylanase degrades xylan into monomers of various sizes by catalyzing the endohydrolysis of the 1,4-β-D-xylosidic linkage randomly, possessing potential in wide industrial applications. Most of xylanases are susceptible to be inactive when suffering high temperature and high alkaline process. Therefore, it is necessary to develop a high amount of effective thermoalkaliphilic xylanases. This study aims to enhance thermoalkaliphilic xylanase production in Pichia pastoris through fermentation parameters optimization and novel efficient fed-batch strategy in high cell-density fermentation...
June 21, 2017: BMC Biotechnology
https://www.readbyqxmd.com/read/28626590/antiglycemic-effect-of-water-extractable-arabinoxylan-from-wheat-aleurone-and-bran
#3
Lovemore Nkhata Malunga, Marta Izydorczyk, Trust Beta
The studies on the effects of arabinoxylan (AX) polysaccharides on postprandial glucose response have resulted in contrasting results owing to the diversity in AX structures. Four water extractable AX (WEAX) extracts obtained from wheat aleurone and bran were used to investigate (a) the effect of AX on activities of α-amylase and α-glucosidase, (b) influence of AX chemical composition on their inhibition potency, and (c) kinetics of enzyme inhibition. α-Amylase activity was not significantly affected by the presence WEAX fractions regardless of type or concentration...
2017: Journal of Nutrition and Metabolism
https://www.readbyqxmd.com/read/28624092/study-on-the-effects-of-wheat-bran-incorporation-on-water-mobility-and-biopolymer-behavior-during-bread-making-and-storage-using-time-domain-1-h-nmr-relaxometry
#4
S Hemdane, P J Jacobs, G M Bosmans, J Verspreet, J A Delcour, C M Courtin
Water binding is suggested to be key in the deleterious effect of wheat bran on bread quality. This study investigates water mobility and biopolymer behavior during bran-rich bread making and storage, using (1)H NMR. Coarse, ground, and pericarp-enriched bran were incorporated in bread dough, and their impact on freshly baked and stored bread properties was assessed. Compared to wheat flour control dough, bran incorporation resulted in a progressive immobilization of water during dough resting, which could be linked to changes in evolution of dough height during fermentation and oven rise...
December 1, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28624091/study-of-biopolymer-mobility-and-water-dynamics-in-wheat-bran-using-time-domain-1-h-nmr-relaxometry
#5
S Hemdane, P J Jacobs, G M Bosmans, J Verspreet, J A Delcour, C M Courtin
In this study, the molecular mobility of water and biopolymers in coarse, ground, and pericarp-enriched (PE) wheat bran and refined flour was investigated using time-domain proton nuclear magnetic resonance relaxometry, and related to their hydration properties. Several specific proton populations were present in the bran samples but not in flour. These populations were mainly assigned to protons of bran-related compounds such as arabinoxylan, cellulose, and lipids. All bran samples showed similar proton distributions at a 44% moisture level, although the chemical composition of coarse/ground bran and PE bran differed...
December 1, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28619635/production-and-characterization-of-polyhydroxyalkanoic-acid-from-bacillus-thuringiensis-using-different-carbon-substrates
#6
Olubusola A Odeniyi, Olakunle J Adeola
Polyhydroxyalkanoic acids (PHA) are biodegradable microbially synthesised polymers which can act as alternatives to conventional petrochemical based plastics. Bacterial isolates from soil and sewage samples were screened for the ability to accumulate PHA using Sudan Black B dye, and growth conditions of the best PHA accumulating bacterium was optimized. The PHA produced was characterized by FTIR spectroscopy. Eight PHA-producing bacteria were isolated and isolate SBC4 which had the highest percentage accumulation of 30% was genotypically identified as Bacillus thuringiensis and selected for further studies...
June 12, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28618173/inter-individual-differences-determine-the-outcome-of-wheat-bran-colonization-by-the-human-gut-microbiome
#7
Kim De Paepe, Frederiek-Maarten Kerckhof, Joran Verspreet, Christophe M Courtin, Tom Van de Wiele
Gut microbiota research reveals a vital role for the luminal and mucosal gut microbiota in human health. Fewer studies, however, have characterized the microbiome associated with undigested, insoluble dietary particles in the gut. These particles can act as a food source for bacteria and offer a physical platform to which they can attach. In this study, the microbiome colonizing wheat bran particles was analyzed. In a batch experiment, wheat bran particles were separately incubated with the fecal microbiota derived from ten donors and washed after 48h to remove loosely attached bacteria...
June 15, 2017: Environmental Microbiology
https://www.readbyqxmd.com/read/28614737/glucose-triggers-the-cytotoxicity-of-citrobacter-sp-r1-against-microcystis-aeruginosa
#8
Pengfei Sun, Sofia Esquivel-Elizondo, Yuhua Zhao, Yonghong Wu
Algicidal bacteria offer a promising option for killing Microcystis aeruginosa, one notorious cyanobacteria causing harmful algal blooms. In this study, Citrobacter sp. R1 presented high algicidal activity (81.6±2.2%, 72h) against M. aeruginosa when cultured using glucose, while it showed no algicidal activity (0±3.4%) when cultured using wheat bran, suggesting that appropriate carbon source is crucial for algicidal bacteria in killing M. aeruginosa. The underlying algicidal mechanism of strain R1 was explored by studying the effect of different carbon sources (glucose and wheat bran) on its key algicidal gene expression and total protein translation...
June 11, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28591592/recombinant-thermo-alkali-stable-endoglucanase-of-myceliopthora-thermophila-bja-rmt-egl-biochemical-characteristics-and-applicability-in-enzymatic-saccharification-of-agro-residues
#9
Priya Phadtare, Swati Joshi, T Satyanarayana
Codon adaptation index (CAI) of a 1263bp long endoglucanase encoding gene from the thermophilic mould Myceliopthora thermophile BJA has been improved from 0.44 to 0.76 by in vitro gene synthesis. The codon optimized endoglucanase gene (Mt-egl) has been constitutively expressed in Pichia pastoris under the regulation of GAP promoter. Recombinant endoglucanase (rMt-egl), purified by size exclusion chromatography, has been confirmed to be a monomeric protein of ∼47kDa. rMt-egl is optimally active at pH 10 and 50°C, displaying stability in broad pH and temperature ranges, with a t1/2 of 60 and 15min at 90 and 100°C, respectively...
June 4, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28585166/development-of-media-to-accelerate-the-isolation-of-indigo-reducing-bacteria-which-are-difficult-to-isolate-using-conventional-media
#10
Masatoshi Nishita, Kikue Hirota, Hidetoshi Matsuyama, Isao Yumoto
Indigo-reducing bacteria perform natural fermentation in indigo fermentation fluid. Owing to the stochastic nature of the process, the constituent in indigo fermentation fluid differ depending on the prepared batch and fermentation period. To identify new indigo-reducing bacteria, isolation of the bacteria is indispensable. However, isolation of indigo-reducing bacteria is difficult because conventional media are often unsuitable to isolate these slow-growing bacteria that also exist in low numbers. Hydrolysates of polysaccharides and mixtures of plant base constituents are candidates to accelerate the isolation of indigo-reducing bacteria that cannot be isolated using conventional media...
July 2017: World Journal of Microbiology & Biotechnology
https://www.readbyqxmd.com/read/28577483/evaluation-of-agricultural-residues-pyrolysis-under-non-isothermal-conditions-thermal-behaviors-kinetics-and-thermodynamics
#11
Jianbiao Chen, Yanhong Wang, Xuemei Lang, Xiu'e Ren, Shuanshi Fan
The thermal conversion characteristics, kinetics, and thermodynamics of agricultural residues, rape straw (RS) and wheat bran (WB), were investigated under non-isothermal conditions. TGA experiments showed that the pyrolysis characteristics of RS were quite different from those of WB. As reflected by the comprehensive devolatilization index, when the heating rate increased from 10 to 30Kmin(-1), the pyrolysis performance of RS and WB were improved 5.27 and 5.96 times, respectively. The kinetic triplets of the main pyrolysis process of agricultural residues were calculated by the Starink method and the integral master-plots method...
May 23, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28573540/hydrolytic-potential-of-five-fungal-supernatants-to-enhance-a-commercial-enzyme-cocktail
#12
Ausra Peciulyte, Maria Pisano, Ronald P de Vries, Lisbeth Olsson
OBJECTIVES: To evaluate the potential of enzyme cocktails produced by five filamentous fungi to supplement the industrial cellulase cocktail, Celluclast 1.5L, in order to improve the efficiency of saccharification. RESULTS: The fungi were cultivated on wheat bran and the resulting supernatants were combined with Celluclast in enzymatic hydrolysis experiments to test their ability to hydrolyze wheat bran and five cellulose-rich substrates. The supernatant showing the best performance was that from an Aspergillus niger cellulase mutant...
June 1, 2017: Biotechnology Letters
https://www.readbyqxmd.com/read/28572958/optimization-of-durum-wheat-bread-enriched-with-bran
#13
Maria A Saccotelli, Amalia Conte, Krystel R Burrafato, Sonia Calligaris, Lara Manzocco, Matteo A Del Nobile
An attempt is made in this study to balance the nutritional and sensory quality of bread. In particular, the formulation of a functional durum wheat bread enriched with bran at high concentration has been developed. Organogel concentration and bran particle size have been used as process variables for bread optimization. Bran concentration was increased at value as high as 15%, thus increasing the nutritional content, even though the sensory quality decreased. Bread was scored barely acceptable at 15% bran concentration...
May 2017: Food Science & Nutrition
https://www.readbyqxmd.com/read/28571587/supplementation-of-grazing-beef-cows-during-gestation-as-a-strategy-to-improve-skeletal-muscle-development-of-the-offspring
#14
D C Marquez, M F Paulino, L N Rennó, F C Villadiego, R M Ortega, D S Moreno, L S Martins, D M de Almeida, M P Gionbelli, M R Manso, L P Melo, F H Moura, M S Duarte
The appropriate supply of nutrients in pregnant cows has been associated with the optimal development of foetal tissues, performance of their progeny and their meat quality. The aim of this study was to evaluate supplementation effects of grazing cows in different stages of gestation on skeletal muscle development and performance of the progeny. Thereby, 27 Nellore cows were divided into three groups (n=9 for each group) and their progeny as follows: UNS, unsupplemented during gestation; MID, supplemented from 30 to 180 days of gestation; LATE, supplemented from 181 to 281 days of gestation...
June 2, 2017: Animal: An International Journal of Animal Bioscience
https://www.readbyqxmd.com/read/28567634/production-purification-and-biochemical-characterization-of-an-exo-polygalacturonase-from-aspergillus-niger-mtcc-478-suitable-for-clarification-of-orange-juice
#15
Gautam Anand, Sangeeta Yadav, Dinesh Yadav
Polygalacturonases (PG) represent an important member of pectinases group of enzymes with immense industrial applications. A fungal strain Aspergillus niger MTCC478 was used for the production of polygalacturonase both under submerged and solid-state fermentation condition. Further its production was optimized under solid-state fermentation condition with media comprising of wheat bran and tea extract. Purification of an exo-PG was achieved by acetone precipitation (60-90%) and CM-cellulose column chromatography revealing 15...
June 2017: 3 Biotech
https://www.readbyqxmd.com/read/28567621/cost-effective-screening-and-isolation-of-xylano-cellulolytic-positive-microbes-from-termite-gut-and-termitarium
#16
Libin Mathew Varghese, Sharad Agrawal, Divya Sharma, Rishi Pal Mandhan, Ritu Mahajan
In this study, screening and isolation of xylano-cellulolytic enzymes producing positive microbes from termitarium and termite gut microbiome were done using cost-effective agricultural wastes. The enrichment of xylano-cellulolytic microbes was done in three steps using wheat bran and waste paper. The qualitative screening of xylanase and cellulase producing micro-organisms was done on nutrient agar plates containing wheat bran and waste paper, respectively. Xylanase and cellulase positive colonies were analysed by observing the zone of substrate (wheat bran and waste paper) hydrolysis around the colonies...
June 2017: 3 Biotech
https://www.readbyqxmd.com/read/28551272/effect-of-cellulase-xylanase-and-%C3%AE-amylase-combinations-on-the-rheological-properties-of-chinese-steamed-bread-dough-enriched-in-wheat-bran
#17
Wenjun Liu, Margaret Anne Brennan, Luca Serventi, Charles Stephen Brennan
The present study investigates the effects of α-amylase (6 and 10ppm), xylanase (70 and 120ppm) and cellulase (35 and 60ppm) on the rheological properties of bread dough. The mixing property of dough was measured by using a DoughLAB. The extension and stickiness of dough were analysed using the Texture Analyzer. The results illustrate that the addition of single enzyme and enzyme combinations can increase the extensibility, softening, mixing tolerance index (MTI) and stickiness, whereas decrease the resistance to extension...
November 1, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28550772/production-of-itaconic-acid-by-biotransformation-of-wheat-bran-hydrolysate-with-aspergillus-terreus-cicc40205-mutant
#18
Xuefeng Wu, Qing Liu, Yongdong Deng, Jinghong Li, Xiaoju Chen, Yongzhong Gu, Xijun Lv, Zhi Zheng, Shaotong Jiang, Xingjiang Li
The replacement of the carbon source in the microbial production of itaconic acid (IA) with economic alternatives has attracted significant attention. In this study, an Aspergillus terreus CICC40205 mutant was used to increase the IA titer and decrease the citric acid titer in the wheat bran hydrolysate compared with the parental strain. The results showed that the IA titer was increased by 33.4%, whereas the citric acid titer was decreased by 75.8%, and were in accordance with those of the improved pathway of co-metabolism of glucose and xylose according to the metabolic flux analysis...
May 17, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28536853/simultaneous-production-of-laccase-and-degradation-of-bisphenol-a-with-trametes-versicolor-cultivated-on-agricultural-wastes
#19
Shengquan Zeng, Jie Zhao, Liming Xia
Solid state fermentation with Trametes versicolor was carried out on agricultural wastes containing bisphenol A (BPA). It was found that BPA degradation was along with the occurrence of laccase production, and wheat bran and corn straw were identified as suitable mixed substrates for laccase production. In the process of BPA degradation with T. versicolor, laccase activity increased rapidly at the 6th-10th day after inoculation. Moreover, BPA can enhance the production of laccase. After 10 days of fermentation, degradation rate of BPA exceeded 90% without the usage of mediators ABTS and acetosyringone at pH 4...
May 23, 2017: Bioprocess and Biosystems Engineering
https://www.readbyqxmd.com/read/28530602/bioactive-compound-and-antioxidant-activity-distribution-in-roller-milled-and-pearled-fractions-of-conventional-and-pigmented-wheat-varieties
#20
Debora Giordano, Monica Locatelli, Fabiano Travaglia, Matteo Bordiga, Amedeo Reyneri, Jean Daniel Coïsson, Massimo Blandino
In this study, the chemical composition of pigmented wheats (yellow, purple and blue types), and the distribution of the bioactive compounds in their roller-milled and pearled fractions, were compared with conventional wheats (red and white types). Roller-milling promoted the recovery of total dietary fiber, β-glucans, phenolic acids and anthocyanins in the bran fraction, which resulted also in a higher total antioxidant activity than the refined flour. Conversely, lutein resulted mainly concentrated in the refined flour...
October 15, 2017: Food Chemistry
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