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Lactic acid production

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https://www.readbyqxmd.com/read/29678911/food-spoilage-associated-leuconostoc-lactococcus-and-lactobacillus-species-display-different-survival-strategies-in-response-to-competition
#1
Margarita Andreevskaya, Elina Jääskeläinen, Per Johansson, Anne Ylinen, Lars Paulin, Johanna Björkroth, Petri Auvinen
Psychrotrophic lactic acid bacteria (LAB) are the prevailing spoilage organisms in packaged cold-stored meat products. Species composition and metabolic activities of such LAB spoilage communities are determined by the nature of meat product, storage condition and interspecies interactions. Our knowledge of systems-level responses of LAB during such interactions is very limited. To expand it, we studied interactions between three common psychrotrophic spoilage LAB ( Leuconostoc gelidum , Lactococcus piscium and Lactobacillus oligofermentans ) by comparing their time-course transcriptome profiles obtained during their growth in individual, pairwise and triple cultures...
April 20, 2018: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/29678738/autochthonous-lactic-acid-bacteria-isolated-from-pig-faeces-in-thailand-show-probiotic-properties-and-antibacterial-activity-against-enteric-pathogenic-bacteria
#2
Wandee Sirichokchatchawan, Puwiya Pupa, Prasert Praechansri, Nutthee Am-In, Somboon Tanasupawat, Piengchan Sonthayanon, Nuvee Prapasarakul
Lactic acid bacteria (LAB) play an important role in pig health and performance that arises from their beneficial impacts on the balance of gastrointestinal microbes, ability to fight enteric pathogens, and capacity to support the immune system. The aim of this study was to evaluate the functional and safety aspects of five previously isolated autochthonous LAB strains, (Lactobacillus plantarum 22F, 25F and 31F, Pediococcus acidilactici 72N and Pediococcus pentosaceus 77F) from pig faeces as potential probiotics for a pig feed supplement...
April 17, 2018: Microbial Pathogenesis
https://www.readbyqxmd.com/read/29678198/metabolic-retroconversion-of-trimethylamine-n-oxide-and-the-gut-microbiota
#3
Lesley Hoyles, Maria L Jiménez-Pranteda, Julien Chilloux, Francois Brial, Antonis Myridakis, Thomas Aranias, Christophe Magnan, Glenn R Gibson, Jeremy D Sanderson, Jeremy K Nicholson, Dominique Gauguier, Anne L McCartney, Marc-Emmanuel Dumas
BACKGROUND: The dietary methylamines choline, carnitine, and phosphatidylcholine are used by the gut microbiota to produce a range of metabolites, including trimethylamine (TMA). However, little is known about the use of trimethylamine N-oxide (TMAO) by this consortium of microbes. RESULTS: A feeding study using deuterated TMAO in C57BL6/J mice demonstrated microbial conversion of TMAO to TMA, with uptake of TMA into the bloodstream and its conversion to TMAO. Microbial activity necessary to convert TMAO to TMA was suppressed in antibiotic-treated mice, with deuterated TMAO being taken up directly into the bloodstream...
April 20, 2018: Microbiome
https://www.readbyqxmd.com/read/29677662/exploring-the-potential-of-lactic-acid-production-from-lignocellulosic-hydrolysates-with-various-ratios-of-hexose-versus-pentose-by-bacillus-coagulans-ipe22
#4
Yujue Wang, Weifeng Cao, Jianquan Luo, Yinhua Wan
The aim of this study was to investigate the feasibility of utilizing different lignocellulosic hydrolysates with various hexose versus pentose (H:P) ratios to produce lactic acid (LA) from Bacillus coagulans IPE22 by fermentations with single and mixed sugar. In single sugar utilization, glucose tended to promote LA production, and xylose preferred to enhance cell growth. In mixed sugar utilization, glucose and pentose were consumed simultaneously when glucose concentration was lower than 20 g/L, and almost the same concentration of LA (50 g/L) was obtained regardless of the differences of H:P values...
April 5, 2018: Bioresource Technology
https://www.readbyqxmd.com/read/29675802/utilization-of-solid-catfish-manure-waste-as-carbon-and-nutrient-source-for-lactic-acid-production
#5
Suan Shi, Jing Li, David M Blersch
The aim of this work was to study the solid waste (manure) produced by catfish as a potential feedstock for the production of lactic acid (LA) via fermentation. The solid waste contains high levels of both carbohydrates and nutrients that are sufficient for LA bacteria. Simultaneous saccharification and co-fermentation (SSCF) was applied using enzyme and Lactobacillus pentosus, and different loadings of enzyme and solid waste were tested. Results showed LA concentrations of 35.7 g/L were obtained at 15% solids content of catfish waste...
April 19, 2018: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/29675615/a-modular-approach-for-high-flux-lactic-acid-production-from-methane-in-an-industrial-medium-using-engineered-methylomicrobium-buryatense-5gb1
#6
Shivani Garg, James M Clomburg, Ramon Gonzalez
Convergence of market drivers such as abundant availability of inexpensive natural gas and increasing awareness of its global warming effects have created new opportunities for the development of small-scale gas-to-liquid (GTL) conversion technologies that can efficiently utilize methane, the primary component of natural gas. Leveraging the unique ability of methanotrophs that use methane as carbon and energy source, biological GTL platforms can be envisioned that are readily deployable at remote petroleum drilling sites where large chemical GTL infrastructure is uneconomical to set-up...
April 19, 2018: Journal of Industrial Microbiology & Biotechnology
https://www.readbyqxmd.com/read/29673840/versatile-effects-of-magnesium-hydroxide-nanoparticles-in-plga-scaffold-mediated-chondrogenesis
#7
Kwang-Sook Park, Byoung-Ju Kim, Eugene Lih, Wooram Park, Soo-Hong Lee, Yoon Ki Joung, Dong Keun Han
Artificial scaffolds made up of various synthetic biodegradable polymers have been reported to have many advantages including cheap manufacturing, easy scale up, high mechanical strength, convenient manipulation, and molding into an unlimited variety of shapes. However, the synthetic biodegradable polymers still have the insufficiency for cartilage regeneration owing to their acidic degradation products. To reduce acidification by degradation of synthetic polymers, we incorporated magnesium hydroxide (MH) nanoparticles into porous polymer scaffold not only to effectively neutralize the acidic hydrolysate but also to minimize the structural disturbance of scaffolds...
April 16, 2018: Acta Biomaterialia
https://www.readbyqxmd.com/read/29670593/technologies-and-trends-to-improve-table-olive-quality-and-safety
#8
REVIEW
Marco Campus, Nurcan Değirmencioğlu, Roberta Comunian
Table olives are the most widely consumed fermented food in the Mediterranean countries. Peculiar processing technologies are used to process olives, which are aimed at the debittering of the fruits and improvement of their sensory characteristics, ensuring safety of consumption at the same time. Processors demand for novel techniques to improve industrial performances, while consumers' attention for natural and healthy foods has increased in recent years. From field to table, new techniques have been developed to decrease microbial load of potential spoilage microorganisms, improve fermentation kinetics and ensure safety of consumption of the packed products...
2018: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29670329/preparation-and-in-vitro-in-vivo-evaluation-of-plga-microspheres-containing-norquetiapine-for-long-acting-injection
#9
Chun-Woong Park, Hyo-Jung Lee, Dong-Won Oh, Ji-Hyun Kang, Chang-Soo Han, Dong-Wook Kim
Background: Norquetiapine ( N -desalkyl quetiapine, NQ) is an active metabolite of quetiapine with stable pharmacokinetic and pharmacological properties. However, its short half-life is a drawback for clinical applications, and long-acting formulations are required. Purpose: The objectives of this study were to prepare improved entrapment efficiency NQ freebase microspheres by the solvent evaporation method with poly(d,l-lactic-co-glycolic acid) (PLGA) as a release modulator and to evaluate their physicochemical and in vitro/in vivo release properties...
2018: Drug Design, Development and Therapy
https://www.readbyqxmd.com/read/29669265/modification-of-ige-binding-to-%C3%AE-s1-casein-by-proteolytic-activity-of-enterococcus-faecium-isolated-from-iranian-camel-milk-samples
#10
Reihane Kordesedehi, Asghar Taheri-Kafrani, Mohammad Rabbani-Khorasgani, Rezvan Kazemi, Daniel Mutangadura, Thomas Haertle
Milk is a perfect source of nutrients for neonates. When breast feeding cannot be done, an infant's alimentation is usually initiated to cow's milk, among the primary foods. It has been reported that about 2.5% of juveniles under the age of 3 years manifest allergic reactions to cow's milk proteins. Among the cow's milk proteins, casein fractions are considered as the strongest allergenic proteins. The proteolytic enzymes of lactic acid bacteria (LAB), during fermentation of dairy products, can break down milk proteins especially caseins and subsequently reduce the immune reactivity of allergenic proteins...
April 15, 2018: Journal of Biotechnology
https://www.readbyqxmd.com/read/29667009/encapsulating-viability-of-multi-strain-lactobacilli-as-potential-probiotic-in-pigs
#11
Sudthidol Piyadeatsoontorn, Rutjawate Taharnklaew, Tewa Upathanpreecha, Pairat Sornplang
Important aspects of the selection of probiotics to be used for mixing in animal feed include host species specificity and probiotic cell survival during production and storage of their products. The research was to screen and investigate some probiotic properties of lactic acid bacteria (LAB) isolated from pig fecal samples. One hundred and thirty-eight representative LAB isolates, which were isolated from 51 pig fecal samples, were tested for acid and bile tolerance, antimicrobial susceptibility, antibacterial activity, potential adhesion to the cell surface, and survival rates when stored in varied microencapsulation forms: freeze-dried, spray-dried, and micro-beads...
April 17, 2018: Probiotics and Antimicrobial Proteins
https://www.readbyqxmd.com/read/29666620/the-impact-of-the-antimicrobial-compounds-produced-by-lactic-acid-bacteria-on-the-growth-performance-of-mycobacterium-avium-subsp-paratuberculosis
#12
Petr Kralik, Vladimir Babak, Radka Dziedzinska
Cell-free supernatants (CFSs) extracted from various lactic acid bacteria (LAB) cultures were applied to Mycobacterium avium subsp. paratuberculosis (MAP) cells to determine their effect on MAP viability. In addition, 5% lactic acid (LA; pH 3) and commercially synthetized nisin bacteriocin were also tested. This procedure was chosen in order to mimic the influence of LAB compounds during the production and storage of fermented milk products, which can be contaminated by MAP. Its presence in milk and milk products is of public concern due to the possible ingestion of MAP by consumers and the discussed role of MAP in Crohn's disease...
2018: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29664420/controlled-release-of-18-%C3%AE-glycyrrhetic-acid-by-nanodelivery-systems-increases-cytotoxicity-on-oral-carcinoma-cell-line
#13
Ilaria Cacciotti, Laura Chronopoulou, Cleofe Palocci, Adriana Amalfitano, Monica Cantiani, Massimo Cordaro, Carlo Lajolo, Cinzia Callà, Alma Boninsegna, Donatella Lucchetti, Patrizia Gallenzi, Alessandro Sgambato, Giuseppina Nocca, Alessandro Arcovito
The topical treatment for oral mucosal diseases is often based on products optimized for dermatologic applications; consequently, a lower therapeutic effect may be present.
 18-β-Glycyrrhetic Acid (GA) is extracted from Glycirrhiza glabra. The first aim of this study was to test the cytotoxicity of GA on PE/CA-PJ15 cells. The second aim was to propose and test two different delivery systems, i.e. nanoparticles and fibers, to guarantee a controlled release of GA in vitro. We used chitosan and poly(lactic-co-glycolic) acid based nanoparticles and polylactic acid fibers...
April 17, 2018: Nanotechnology
https://www.readbyqxmd.com/read/29662176/cancer-cell-secreted-exosomal-mir-105-promotes-tumour-growth-through-the-myc-dependent-metabolic-reprogramming-of-stromal-cells
#14
Wei Yan, Xiwei Wu, Weiying Zhou, Miranda Y Fong, Minghui Cao, Juan Liu, Xiaojing Liu, Chih-Hong Chen, Oluwole Fadare, Donald P Pizzo, Jiawen Wu, Liang Liu, Xuxiang Liu, Andrew R Chin, Xiubao Ren, Yuan Chen, Jason W Locasale, Shizhen Emily Wang
Cancer and other cells residing in the same niche engage various modes of interactions to synchronize and buffer the negative effects of environmental changes. Extracellular microRNAs (miRNAs) have recently been implicated in the intercellular crosstalk. Here we show a mechanistic model involving breast-cancer-secreted, extracellular-vesicle-encapsulated miR-105, which is induced by the oncoprotein MYC in cancer cells and, in turn, activates MYC signalling in cancer-associated fibroblasts (CAFs) to induce a metabolic program...
April 16, 2018: Nature Cell Biology
https://www.readbyqxmd.com/read/29660816/bacterial-communities-in-serpa-cheese-by-culture-dependent-techniques-16s-rrna-gene-sequencing-and-high-throughput-sequencing-analysis
#15
Maria Teresa P Gonçalves, María José Benito, María de Guía Córdoba, Conceição Egas, Almudena V Merchán, Ana I Galván, Santiago Ruiz-Moyano
Serpa cheese is one of the traditional regional Portuguese cheeses having the Protected Denomination of Origin (PDO) designation. This study investigated the bacterial community in the traditional Portuguese Serpa cheese. The microorganisms identified at the end of ripening (30 days) mainly were lactic acid bacteria (LAB). Lactobacillus paracasei/Lactobacillus casei was the main species in cheese from PDO registered industries, whereas in non-PDO registered industries Lactobacillus brevis was highlighted, among other LAB...
April 16, 2018: Journal of Food Science
https://www.readbyqxmd.com/read/29658146/uva-metabolism-and-melanoma-uva-makes-melanoma-hungry-for-metastasis
#16
REVIEW
York Kamenisch, Irina Ivanova, Konstantin Drexler, Mark Berneburg
Ultraviolet (UV) radiation has a plethora of effects on human tissues. In the UV spectrum, wavelengths above 320nm fall into the UVA-range and for these it has been shown that they induce reactive oxygen species (ROS), DNA mutations and are capable to induce melanoma in mice. In addition to this it was recently shown that UVA irradiation and UVA-induced ROS also increase glucose metabolism of melanoma cells. UVA irradiation causes a persistent increase in glucose consumption, accompanied by increased glycolysis, increased lactic acid production and activation of the pentose phosphate pathway...
April 15, 2018: Experimental Dermatology
https://www.readbyqxmd.com/read/29657125/rice-straw-pretreatment-using-deep-eutectic-solvents-with-different-constituents-molar-ratios-biomass-fractionation-polysaccharides-enzymatic-digestion-and-solvent-reuse
#17
Ao-Lin Li, Xue-Dan Hou, Kai-Peng Lin, Xuan Zhang, Ming-Hui Fu
Lignocellulosic biomass pretreatment with deep eutectic solvents (DESs) is a promising and challenging process for production of biofuels and valuable platform chemicals. In this work, rice straw was mainly fractionated into carbohydrate-rich materials (CRMs) and lignin-rich materials (LRMs) by 90% lactic acid/choline chloride (LC)-water solution with different molar ratio of hydrogen bond donor (HBD, lactic acid) and hydrogen bond acceptor (HBA, choline chloride). It was found that high HBD/HBA molar ratio of DESs was favorable for achieving CRMs and LRMs with high purity, and both HBD and HBA were responsible for effective biomass fractionation possibly due to their synergistic effect on highly efficient breakage of the linkage between hemicellulose and lignin and thus lignin extraction...
April 12, 2018: Journal of Bioscience and Bioengineering
https://www.readbyqxmd.com/read/29656125/strategic-ultrasound-induced-stress-response-of-lactic-acid-bacteria-on-enhancement-of-%C3%AE-glucosidase-activity-for-bioconversion-of-isoflavones-in-soymilk
#18
Wen-Sin Liu, Chun-Yao Yang, Tony J Fang
The purpose of the study is to develop the new methodology of strategic ultrasound treatment on lactic acid bacteria (LAB) to induce stress response for the enhancement of β-glucosidase activity that can be used for the biotransformation of glucosides into aglycones isoflavones in soymilk. Among the five LAB tested, Lactobacillus acidophilus BCRC 10695 showed the best ability to release β-glucosidase for further ultrasonic stimulation to induce proper stress response. With ultrasound (20 kHz, amplitude at 20%) to irradiate on L...
April 12, 2018: Journal of Microbiological Methods
https://www.readbyqxmd.com/read/29655730/nmr-and-gc-ms-based-metabolomic-characterization-of-sunki-an-unsalted-fermented-pickle-of-turnip-leaves
#19
Satoru Tomita, Toshihide Nakamura, Sanae Okada
This study revealed the compositional characteristics of sunki, a traditional, unsalted, lactic acid-fermented pickle produced using turnip leaf in Kiso district, Japan. Comprehensive compositional analysis by two metabolomic approaches based on NMR and solid-phase microextraction-GC/MS methods was used to determine its chemical composition by annotating 54 water-soluble and 62 volatile compounds. Principal component analysis showed that samples had different compositions, depending on the agricultural processing factory and production year...
August 30, 2018: Food Chemistry
https://www.readbyqxmd.com/read/29655557/an-evaluation-of-the-effectiveness-of-a-chemical-additive-based-on-sodium-benzoate-potassium-sorbate-and-sodium-nitrite-on-the-fermentation-and-aerobic-stability-of-corn-silage
#20
Limin Kung, Megan L Smith, Erica Benjamim da Silva, Michelle C Windle, Thiago C da Silva, Stephanie A Polukis
We evaluated the effectiveness of an additive comprising sodium benzoate, potassium sorbate, and sodium nitrite (SSL) as active ingredients for its ability to improve the aerobic stability of corn silages made in North America. In experiment 1, treatment with SSL (1.5 and 2.0 L/t) on whole-plant corn (WPC) was compared with treatment with an additive containing buffered propionic acid and citric acid (BPA; 2 L/t) on corn harvested at 32 and 38% DM and ensiled for 120 d. Silage treated with BPA was higher in ammonia-N and propionic acid relative to other treatments...
April 11, 2018: Journal of Dairy Science
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