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Lactic acid production

Wenxia Chen, Jiasheng Fang, Yiwei Zhang, Guangliang Chen, Shuo Zhao, Chao Zhang, Ran Xu, Jiehua Bao, Yuming Zhou, Xin Xiang
Semiconductor nanostructures have received considerable attention in the field of photocatalytic hydrogen evolution. However, eco-friendly, high efficiency, and low-cost semiconductor materials are still desired. In consideration of this, herein, we design a new and economic noble-metal-free CdS/Znx Co3-x O4 (CdS/ZCO) nanohybrid photocatalyst using a metal-organic framework (MOF) template, which is a framework structure composed of organic ligands and metal ion nodes with different numbers of connections. The as-prepared CdS/ZCO composites with a large specific surface area and porous hollow structure exhibit remarkable catalytic activity and high stability for hydrogen generation...
February 19, 2018: Nanoscale
P P Balraadjsing, E C de Jong, D W Grijpma, M W Tanck, S A Zaat
Biomaterial-associated infections (BAIs) are frequent complications in the use of medical devices (biomaterials) correlated with considerable patient discomfort and high treatment costs. The presence of a biomaterial in the host causes derangement of local immune responses increasing susceptibility to infection. Dendritic cells (DCs) have an important role in directing the nature of immune responses by activating and controlling CD4+ T helper (Th) cell responses. To assess the immunomodulatory effect of the combined presence of biomaterials and Staphylococcus aureus (S...
February 19, 2018: European Cells & Materials
Xiangyu Song, Lijuan Zhou, Beibei Ding, Xiang Cui, Yongxin Duan, Jianming Zhang
Cellulose nanocrystals (CNCs) are predominantly obtained by the traditional sulfuric acid hydrolysis process. However, as-prepared CNCs powder features low thermal stability and poor redispersibility due to the existence of sulfonate groups and the hydrogen bond interaction among particles. Herein, by mixing the ionic liquid [BMIm][BF4 ] with freshly prepared CNCs without dialysis through a simple rotary evaporate procedure, the simultaneous improvement of thermal stability and redispersibility of CNCs has been achieved...
April 15, 2018: Carbohydrate Polymers
Jialing Tang, Xiaochang C Wang, Yisong Hu, Yunhui Pu, Jin Huang, Huu Hao Ngo, Yonggang Zeng, Yuyou Li
In this study, nitrogen removal using the lactic acid fermentation products from food waste and other external chemical carbon sources (sodium acetate, sodium lactate and starch) was investigated. Similar to sodium acetate and lactate, the lactic acid-enriched fermentation liquid from food waste (FLFW) exhibited a high denitrification rate (5.5 mg NO x -N/(g-VSS h)) and potential (0.16 g NO 3 - -N/g COD), and could achieve high NH 4 + -N and total nitrogen (TN) removal efficiencies during long-term operation...
February 8, 2018: Bioresource Technology
Minghui Yan, Bing-Hua Wang, Xiaofen Xu, Peng Chang, Feng Hang, Zhengjun Wu, Chunping You, Zhenmin Liu
Family GH70 glucansucrases (GSs) catalyze the synthesis of α-glucans from sucrose, a reaction widely seen in lactic acid bacteria (LAB). These enzymes have been implicated in many aspects of the microbial life. Products of GSs have great commercial value as food supplements and medical materials, therefore these enzymes have attracted much attention from both fields of science and industry. However, certain issues concerning the origin and evolution of GS are still to be addressed, although an increasing number of GH70 enzymes have been characterized...
February 16, 2018: Applied and Environmental Microbiology
Simon van der Els, Jennelle K James, Michiel Kleerebezem, Peter A Bron
CRISPR-Cas9 technology has been exploited for the removal or replacement of genetic elements in a wide range of prokaryotes and eukaryotes. Here we describe the extension of the Cas9 application toolbox to the industrially important dairy species Lactococcus lactis The Cas9 expression vector pLABTarget was constructed, encoding the Streptocccus pyogenes Cas9 under control of a constitutive promoter, and allowing plug and play introduction of sgRNA sequences to target specific genetic loci. Introduction of a pepN -targeting derivative of pLABTarget into L...
February 16, 2018: Applied and Environmental Microbiology
W X Li, Y Q Chen, L H Zhao, Q G Ma, J Y Zhang, C Ji
Over supplementation of copper (Cu) in animal diets may cause serious pollution in soil, water and harvested crops. To minimize the potential pollution, the effects of corn-soybean basal diet with or without supplementation of 8 mg Cu/kg on laying performance, plasma biochemical metabolic indices, and antioxidant status in laying hens were evaluated under normal and cyclic high temperatures. A total of 240 Hy-Line Brown laying hens were randomly allotted to 4 treatments with 6 replicates of 10 hens per replicate according to factorial design involved in 2 temperatures [normal temperature (NT) vs...
February 14, 2018: Poultry Science
François P Douillard, Diego Mora, Robyn T Eijlander, Michiel Wels, Willem M de Vos
Several probiotic-marketed formulations available for the consumers contain live lactic acid bacteria and/or bifidobacteria. The multispecies product commercialized as VSL#3 has been used for treating various gastro-intestinal disorders. However, like many other products, the bacterial strains present in VSL#3 have only been characterized to a limited extent and their efficacy as well as their predicted mode of action remain unclear, preventing further applications or comparative studies. In this work, the genomes of all eight bacterial strains present in VSL#3 were sequenced and characterized, to advance insights into the possible mode of action of this product and also to serve as a basis for future work and trials...
2018: PloS One
María Mercedes Palomino, Germán F Burguener, Josefina Campos, Mariana Allievi, Joaquina Fina-Martin, Mariano Prado Acosta, Darío A Fernández Do Porto, Sandra M Ruzal
Lactobacillus helveticus is a lactic acid bacterium used traditionally in the dairy industry, especially in the manufacture of cheeses. We present here the 2,141,841-bp draft genome sequence of L. helveticus strain ATCC 12046, a potential starter strain for improving cheese production.
February 15, 2018: Genome Announcements
Muhammed Shafeekh Muyyarikkandy, Fahad H Alqahtani, Ion Mandoiu, Mary Anne Amalaradjou
Lactic acid bacteria are known to exhibit probiotic properties through various mechanisms, including competitive exclusion, pathogen inhibition, production of antimicrobial substances, and maintenance of eubiosis. Here, we present the draft genome sequence of a novel probiotic strain, Lactobacillus rhamnosus strain NRRL B-442, which exhibits potent antivirulence activity against Salmonella enterica .
February 15, 2018: Genome Announcements
B K Puri, J A Monro
The non-invasive assessment of chronic tissue hypoxia is difficult. Pulse oximetry only allows the peripheral oxygen saturation to be measured, while the detection of hyperlactataemia needs to take into account the fact that the accumulation of lactic acid may result from several causes other than prolonged tissue hypoxia. Arterial blood oxygen measurement is invasive and often does not give a good indication of the level of tissue hypoxia. Other suggested methods include the use of positron emission tomography, magnetic resonance T2 ∗ relaxation time measurement, photoacoustics and high-frequency ultrasound...
March 2018: Medical Hypotheses
Xiaohui Mo, Fang Wei, Yin Tong, Ling Ding, Qing Zhu, Shujuan Du, Fei Tan, Caixia Zhu, Yuyan Wang, Qian Yu, Yeqiang Liu, Erle S Robertson, Zhenghong Yuan, Qiliang Cai
High plasma lactate is associated with poor prognosis of many malignancies, but its role in virally mediated cancer progression and underlying molecular mechanisms are unclear. Epstein-Barr virus (EBV), the first human oncogenic virus, causes several cancers, including B cell lymphoma. Here, we report that lactate dehydrogenase (LDH-A) expression and lactate production are elevated in EBV-immortalized B lymphoblastic cells, and lactic acid (LA, acidic lactate) at low concentration triggers EBV-infected B cell adhesion, morphological changes, and proliferation in vitro and in vivo Moreover, LA-induced responses of EBV-infected B cells uniquely occurs in viral latency type III and it is dramatically associated with the inhibition of global viral microRNAs, particularly the miR-BHRF1 cluster, and the high expression of SMAD3 , JUN , and COL1A genes...
February 14, 2018: Journal of Virology
Xiaonan Liu, Youkui Zhang, Kun Xiong, Minhao Yan
Bone repair microspheres have been widely studied due to their convenience during clinical operations. In this study, beta tricalcium phosphate/sodium alginate/poly(D,L-lactic acid) (β-TCP/SA/PDLLA) composite microspheres were successfully prepared using the liquid droplet method. Then, β-TCP/SA/PDLLA composite microspheres were soaked in simulated body fluids (SBF) for 7 days, and tested in an X-ray diffractometer (XRD). The results indicated that sodium alginate (SA) and poly(D,L-lactic acid) (PDLLA) are not limiting factors for the transformation of β-TCP to HA...
June 1, 2018: Journal of Nanoscience and Nanotechnology
Yanbei Hou, Liu Longxiang, Shuilai Qiu, Xia Zhou, Zhou Gui, Yuan Hu
Co-based metal-organic framework (Co-MOF) nanosheets were successfully synthesized by the organic ligands with Schiff-base structure. The laminated structure makes Co-MOF nanosheets take a great advantages in the application of flame retardant field. Meanwhile, -C=N- from Schiff base potentially provide active sites for further modification. In this work, DOPO was used to modify Co-MOF (DOPO@Co-MOF) to further enhance its flame retardant efficiency. It is attractive that DOPO has a synergistic effect with Co-MOF on improving fire safety of poly(lactic acid) (PLA)...
February 13, 2018: ACS Applied Materials & Interfaces
Giulia Tabanelli, Federica Pasini, Ylenia Riciputi, Lucia Vannini, Giorgia Gozzi, Federica Balestra, Maria Fiorenza Caboni, Fausto Gardini, Chiara Montanari
Because of the impossibility to consume food of animal origin, vegan consumers are looking for substitutes that could enrich their diet. Among many substitutes, fermented nut products are made from different nut types and obtained after soaking, grinding, and fermentation. Although other fermented vegetable products have been deeply investigated, there are few data about the fermentative processes of nut-based products and the microbial consortia able to colonize these products are not yet studied. This study characterized a hand-made vegan product obtained from cashew nut...
February 13, 2018: Journal of Food Science
Barbara Prandi, Stefania Baldassarre, Neha Babbar, Elena Bancalari, Pieter Vandezande, David Hermans, Geert Bruggeman, Monica Gatti, Kathy Elst, Stefano Sforza
Pectin oligosaccharides (POS) have been indicated as a new class of potential prebiotic compounds, which can be produced from pectin-rich food byproducts. In the present study, different technological means of POS production were explored to produce tailor-made POS mixtures starting from sugar beet pulp. The overall POS production process consisted of two steps: the extraction of pectin and the hydrolysis of pectin to tailored POS by combined hydrolysis/fractionation approaches. Different extraction as well as hydrolysis and fractionation methodologies were applied...
February 13, 2018: Food & Function
Axelle Septembre-Malaterre, Fabienne Remize, Patrick Poucheret
Nutritional recommendations emphasize fruit and vegetable consumption. This is related to health-benefits associated with bioactive nutritive molecules (nutrients, vitamins, minerals, fibers, …) as well as non-nutritive phytochemicals (phenolic compounds, flavonoids, bioactive peptides, …) content of these types of foods. Fermented fruit or vegetable products are part of various diets worldwide. Lactic acid bacteria (LAB) fermentation is common among the various fermentation processes used. It produces changes in both profile and types of bioactive compounds...
February 2018: Food Research International
Henrique Jaster, Giordana Demaman Arend, Katia Rezzadori, Vitor Clasen Chaves, Flávio Henrique Reginatto, José Carlos Cunha Petrus
Strawberry juice was concentrated using block freeze concentration process. The concentrate was used to produce two yogurts with different concentrations of cryoconcentrated strawberry pulp (15% and 30%). Total lactic acid bacteria count, physicochemical and rheological properties was evaluated during storage (7days) for all yogurts. Also, the beverages produced were compared with two commercial trademarks. It was observed that the total lactic acid bacteria count remained higher than 108CFU·mL-1 during the storage time for all beverages studied...
February 2018: Food Research International
Zihan Qin, Mikael A Petersen, Wender L P Bredie
The aim of this study was to characterize the flavor profiles of 14 commercial apple ciders from the United Kingdom and Scandinavian region. The flavor properties were established by sensory profiling and analysis of volatile and non-volatile components, including titratable acidity, pH, residual sugars and organic acids. A total of 72 volatile compounds were identified in the 14 apple ciders using dynamic headspace sampling (DHS) coupled to gas chromatography-mass spectrometry (GC/MS). The main volatile compounds found in apple ciders were esters and higher alcohols, followed by aldehydes and fatty acids...
March 2018: Food Research International
Annalisa Ricci, Martina Cirlini, Alessia Levante, Chiara Dall'Asta, Gianni Galaverna, Camilla Lazzi
In this study we explored, for the first time, the lactic acid fermentation of elderberry juice (EJ). A total of 15 strains isolated from dairy and plant matrices, belonging to L. plantarum, L. rhamnosus and L. casei, were used for fermentations. The volatile profile of started and unstarted EJ was characterized by HS-SPME/GC-MS technique after 48h of fermentation and 12days of storage at 4°C. All L. plantarum and L. rhamnosus strains exhibited a good capacity of growth while not all L. casei strains showed the same ability...
March 2018: Food Research International
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