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https://www.readbyqxmd.com/read/29775827/responses-of-atrazine-degradation-and-native-bacterial-community-in-soil-to-arthrobacter-sp-strain-hb-5
#1
Jianpeng Gao, Peipei Song, Guanying Wang, Jinhua Wang, Lusheng Zhu, Jun Wang
The bioremediation of soil contaminated with organic pesticides is a safe and effective approach to remove pollutants from the soil. However, whether the invasion of foreign aid organisms affects the local organisms has received increasing attention in recent years. Therefore, the purpose of this study was to examine the degradation ability of atrazine by the strain HB-5 and evaluate its effects on natural bacterial communities in a miniature pot experiment. Results showed that HB-5 accelerated the degradation of atrazine and the degradation half-life of atrazine was 3...
May 15, 2018: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29775711/co-expression-purification-and-characterization-of-the-lipase-and-foldase-of-burkholderia-contaminans-lteb11
#2
Robson Carlos Alnoch, Adriano Alves Stefanello, Viviane de Paula Martini, Jeferson Luiz Richter, Cesar Mateo, Emanuel Maltempi de Souza, David Alexander Mitchell, Marcelo Muller-Santos, Nadia Krieger
Genes encoding lipase LipBC (lipA) and foldase LifBC (lipB) were identified in the genome of Burkholderia contaminans LTEB11. Analysis of the predicted amino acid sequence of lipA showed its high identity with lipases from Pseudomonas luteola (91%), Burkholderia cepacia (96%) and Burkholderia lata (97%), and classified LipBC lipase in the lipase subfamily I.2. The genes lipA and lipB were amplified and cloned into expression vectors pET28a(+) and pT7-7, respectively. His-tagged LipBC and native LifBC were co-expressed in Escherichia coli and purified...
May 15, 2018: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29775704/alkaline-active-cyanide-dihydratase-of-flavobacterium-indicum-mtcc-6936-growth-optimization-purification-characterization-and-in-silico-analysis
#3
Virender Kumar, Vijay Kumar, Tek Chand Bhalla
The present work explores a rare cyanide dihydratase of Flavobacterium indicum MTCC 6936 for its potential of cyanide degradation. The enzyme is purified to 12 fold with a yield of 76%. SDS and native-PAGE analysis revealed that enzyme was monomer of 40 kDa size. The enzyme works well in mesophilic range at wide array of pH. The thermostability profile of cyanide dihydratase revealed that the enzyme is quite stable at 30 °C and 35 °C with half-life of 6 h 30 min and 5 h respectively. Km and Vmax for cyanide dihydratase of F...
May 15, 2018: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29775664/auto-induction-for-high-level-production-of-biologically-active-reteplase-in-escherichia-coli
#4
Mehrnoosh Fathi-Roudsari, Nader Maghsoudi, Amirhossein Maghsoudi, Sepideh Niazi, Morvarid Soleiman
Reteplase is a third generation tissue plasminogen activator (tPA) with a modified structure and prolonged half-life in comparison to native tPA. As a non-glycosylated protein, reteplase is expressed in Escherichia coli. Due to presence of several disulfide bonds, high level production of reteplase is complicated and needs extra steps for conversion to biologically active form. Auto-induction represents a method for high-yield growth of bacterial cells and higher expression of recombinant proteins. Here we have tried to optimize the auto-induction procedure for soluble and active expression of reteplase in E...
May 15, 2018: Protein Expression and Purification
https://www.readbyqxmd.com/read/29775605/outcomes-of-planned-2-stage-hybrid-aortic-repair-with-dacron-replaced-proximal-landing-zone
#5
David N Ranney, Babatunde A Yerokun, Ehsan Benrashid, Muath Bishawi, Adam Williams, Richard L McCann, G Chad Hughes
BACKGROUND: Results of hybrid arch repair (HAR) utilizing native zone 0 proximal landing zone (PLZ) have been unsatisfactory in many series, especially in the setting of ascending aortic dilation (>4.0 cm). This study reports early and late outcomes of planned 2-stage HAR with open 1st stage proximal aortic replacement (PAR) followed by 2nd stage thoracic endovascular aortic repair (TEVAR) with PLZ within the Dacron replaced zone 0. METHODS: N=34 patients underwent planned 2-stage HAR between 1/2006-8/2017...
May 15, 2018: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/29775566/the-challenge-of-discordant-serology-in-chagas-disease-the-role-of-two-confirmatory-techniques-in-inconclusive-cases
#6
Zaira Moure, Elena Sulleiro, Laura Iniesta, Carmen Guillen, Israel Molina, M Magdalena Alcover, Cristina Riera, Tomás Pumarola, Roser Fisa
Serodiscordance in Chagas disease (CD) remains a challenge since individuals with inconclusive results are clinically complicated to manage. This work, conducted outside the endemic area, aims to compare two different confirmatory techniques for the diagnosis of CD in individuals without a definitive diagnosis, to analyze the performance of the screening techniques in this group of patients, and to describe the serological follow-up of these subjects over time. Sera from 48 individuals with repeatedly discordant results by one recombinant enzyme immunoassay (r-ELISA) and one native ELISA (n-ELISA), were included in the study...
May 15, 2018: Acta Tropica
https://www.readbyqxmd.com/read/29775543/native-bacterial-communities-and-listeria-monocytogenes-survival-in-soils-collected-from-the-lower-mainland-of-british-columbia-canada
#7
Justin Falardeau, Khalil Walji, Maxime Haure, Karen Fong, Gregory A Taylor, Yussanne Ma, Sean Smukler, Siyun Wang
Soil is an important reservoir for Listeria monocytogenes, a foodborne pathogen implicated in numerous produce-related outbreaks. Our objective was to (i) compare the survival of L. monocytogenes between three soils, (ii) compare the native bacterial communities across these soils, and (iii) investigate relationships between L. monocytogenes survival, native bacterial communities, and soil properties. Listeria spp. populations were monitored on PALCAM agar in three soils inoculated with L. monocytogenes (~5 x 106 CFU/g): conventionally farmed (CS), grassland transitioning to conventionally farmed (TS), and uncultivated grassland (GS)...
May 18, 2018: Canadian Journal of Microbiology
https://www.readbyqxmd.com/read/29775426/impact-of-a-native-streptomyces-flavovirens-from-mushroom-compost-on-green-mold-control-and-yield-of-agaricus-bisporus
#8
Ljiljana Šantrić, Ivana Potočnik, Ljiljana Radivojević, Jelena Gajić Umiljendić, Emil Rekanović, Bojan Duduk, Svetlana Milijašević-Marčić
Thirty-five actinobacterial isolates, obtained from button mushroom (Agaricus bisporus) substrates (i.e., compost in different phases of composting, black peat or casing layer) in Serbia in 2014-2016 were tested in vitro against the causal agents of green mold in cultivated mushroom. Out of six most promising isolates, A06 induced 42.4% in vitro growth inhibition of Trichoderma harzianum T54, and 27.6% inhibition of T. aggressivum f. europaeum T77. The novel strain A06 was identified as Streptomyces flavovirens based on macroscopic and cultural characteristics and 16S rDNA sequence and used in mushroom growing room experiments...
May 18, 2018: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/29775424/optimized-yeast-based-in-vitro-bioassay-for-determination-of-estrogenic-and-androgenic-activity-of-hydroxylated-methoxylated-metabolites-of-bdes-cbs-and-related-lipophilic-organic-pollutants
#9
Marek Roszko, Marta Kamińska, Krystyna Szymczyk, Katarzyna Piasecka-Jóźwiak, Beata Chabłowska
Persistent organic pollutants (POPs) are known to show endocrine disrupting (ED) activity, including interactions with hormone receptors. The aim of this work was to develop a bioassay applicable for evaluation of ED potency of highly lipophilic metabolites of POPs. To that end, a yeast-based bio-assay protocol was used. Estrogenic / androgenic activity of some native brominated biphenyl ethers (BDEs) / chlorinated biphenyls (CBs), and their hydroxylated / methoxylated metabolites was assessed. Since data (including potency compared to reference native hormones) obtained using different protocols vary, the possibility that yeast transforms POPs into some more potent compounds was first checked; it seems that no such transformation is important from the test applicability standpoint...
May 18, 2018: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/29775143/testing-the-effectiveness-and-the-contribution-of-experimental-supercharge-reversed-end-to-side-nerve-transfer
#10
Mustafa Nadi, Sudheesh Ramachandran, Abir Islam, Joanne Forden, Gui Fang Guo, Rajiv Midha
OBJECTIVE Supercharge end-to-side (SETS) transfer, also referred to as reverse end-to-side transfer, distal to severe nerve compression neuropathy or in-continuity nerve injury is gaining clinical popularity despite questions about its effectiveness. Here, the authors examined SETS distal to experimental neuroma in-continuity (NIC) injuries for efficacy in enhancing neuronal regeneration and functional outcome, and, for the first time, they definitively evaluated the degree of contribution of the native and donor motor neuron pools...
May 18, 2018: Journal of Neurosurgery
https://www.readbyqxmd.com/read/29775133/preservation-of-electrophysiological-functional-connectivity-after-partial-corpus-callosotomy-case-report
#11
Kaitlyn Casimo, Fabio Grassia, Sandra L Poliachik, Edward Novotny, Andrew Poliakov, Jeffrey G Ojemann
Prior studies of functional connectivity following callosotomy have disagreed in the observed effects on interhemispheric functional connectivity. These connectivity studies, in multiple electrophysiological methods and functional MRI, have found conflicting reductions in connectivity or patterns resembling typical individuals. The authors examined a case of partial anterior corpus callosum connection, where pairs of bilateral electrocorticographic electrodes had been placed over homologous regions in the left and right hemispheres...
May 18, 2018: Journal of Neurosurgery. Pediatrics
https://www.readbyqxmd.com/read/29775107/heavy-metals-contamination-and-accumulation-in-submerged-macrophytes-in-an-urban-river-in-china
#12
Guangqiu Lu, Bei Wang, Cuiping Zhang, Shuying Li, Jiliang Wen, Guoli Lu, Chunrong Zhu, Yuanqing Zhou
Deteriorating urban water quality has attracted considerable attention in China. We investigated the contamination levels and distribution of heavy metals (As, Cd, Cu, Ni, Pb, and Zn) in Yuxi River water and sediments, and assessed the heavy metal accumulation capability of five species of submerged macrophytes: Vallisneria natans (Lour.) Hara, Potamogeton pectinatus L., Hydrilla verticillata (L. f.) Royle, Myriophyllum spicatum L., and Potamogeton crispus L. Samples were collected from upstream and downstream locations in different season...
July 3, 2018: International Journal of Phytoremediation
https://www.readbyqxmd.com/read/29774654/a-photoactivatable-%C3%AE-5%C3%AE-1-specific-integrin-ligand
#13
Aranzazu Del Campo, Roshna V Nair, Aleeza Farrukh
The integrin α5β1 is overexpressed in colon, breast, ovarian, lung and brain tumors and has been identified as key component in mechanosensing. In order to study how dynamic changes of α5β1 engagement affect cellular behaviour, photoactivatable derivatives of α5β1 specific ligands are presented in this article. A photoremovable protecting group (PRPG) was introduced into the ligand structure at a relevant position for integrin recognition. The presence of the chromophore temporally inhibited ligand bioactivity...
May 18, 2018: Chembiochem: a European Journal of Chemical Biology
https://www.readbyqxmd.com/read/29774560/high-resolution-separation-of-monoclonal-antibodies-mixtures-and-their-charge-variants-by-an-alternative-and-generic-cze-method
#14
Alexandre Goyon, Yannis Nicolas Francois, Olivier Colas, Alain Beck, Jean Luc Veuthey, Davy Guillarme
The determination of mAb critical quality attributes (CQA) is crucial for their successful application in health diseases. A generic CZE method was developed for the high-resolution separation of various mAb charge variants, which are often recognized as important CQA. A dynamic coating of the capillary was obtained with polyethylene oxide (PEO), whereas Bis-Tris allowed the analysis of mAbs under native conditions at pH 7.0. The effect of PEO and Bis-Tris concentrations, as well as the nature of the acidic counter ion on the method performance were systematically studied...
May 17, 2018: Electrophoresis
https://www.readbyqxmd.com/read/29774499/factors-influencing-l2-self-repair-behavior-the-role-of-l2-proficiency-attentional-control-and-l1-self-repair-behavior
#15
Michael Zuniga, Daphnée Simard
Self-repairs, that is revisions of speech that speakers themselves initiate and complete (Salonen and Laakso in J Child Lang 36:859, 2009. https://doi.org/10.1017/s0305000908009240 ), are frequently used to observe the cognitive and linguistic processes underlying second language (L2) speech production. Previous research has shown that factors such as L2 proficiency, attentional control and native language (L1) self-repair behavior interact with L2 self-repair behavior. To our knowledge, however, no research has examined how these three factors interact within a cohort of L2 speakers...
May 17, 2018: Journal of Psycholinguistic Research
https://www.readbyqxmd.com/read/29774337/fermentation-alters-the-bioaccessible-phenolic-compounds-and-increases-the-alpha-glucosidase-inhibitory-effects-of-aronia-juice-in-a-dairy-matrix-following-in-vitro-digestion
#16
Xue Du, Angela D Myracle
The prevalence of diabetes reached 415 million worldwide in 2015. Polyphenol-rich food intake can benefit the glycemic control for individuals with diabetes. Fermentation may increase the bioavailability of polyphenols, which is generally low. Aronia (Aronia melanocarpa) is a polyphenol-rich berry that is native to North America. Proanthocyanins and anthocyanins are the major phenolic compounds in aronia. In this study, aronia kefir was made by fermenting cow's milk with added aronia juice. The changes in bioaccessible polyphenols of aronia kefir during digestion were assessed using an in vitro model...
May 18, 2018: Food & Function
https://www.readbyqxmd.com/read/29774018/the-invasive-brazilian-pepper-tree-schinus-terebinthifolius-is-colonized-by-a-root-microbiome-enriched-with-alphaproteobacteria-and-unclassified-spartobacteria
#17
Karim Dawkins, Nwadiuto Esiobu
Little is known about the rhizosphere microbiome of the Brazilian pepper tree (BP) - a noxious category 1 invasive plant inducing an enormous economic and ecological toll in Florida. Some invasive plants have been shown to drastically change the soil microbiome compared to other native plants. The rhizobacteria community structure of BP, two Florida native plants ( Hamelia patens and Bidens alba ) and bulk soils were characterized across six geographical sites. Although all 19 well-known and 10 poorly described phyla were observed in all plant rhizospheres, BP contained the least total bacterial abundance (OTUs) with a distinct bacteria community structure and clustering patterns differing significantly (pCOA and PERMANOVA) from the natives and bulk soil...
2018: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29773829/sequential-immunizations-with-a-panel-of-hiv-1-env-virus-like-particles-coach-immune-system-to-make-broadly-neutralizing-antibodies
#18
Teena Mohan, Zachary Berman, Sang-Moo Kang, Bao-Zhong Wang
Broadly neutralizing antibodies (bnAbs) are correlated with passive HIV/SHIV protection and are desirable components of a HIV protective immunity. In the current study, we have designed a sequential-immunization strategy with a panel of envelope glycoprotein (Env)-enriched virus-like particles (VLPs) from various HIV-1 clades (A-E) to elicit bnAbs with high breadth and potency of neutralization in rabbits. We have compared this regimen with repetitive immunizations of individual Env (subtype B) VLPs or a mixture of various Env VLPs...
May 17, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29773804/smooth-muscle-like-ca-2-regulation-of-actin-myosin-interaction-in-adult-jellyfish-striated-muscle
#19
Hiroyuki Tanaka, Shiori Ishimaru, Yasuhiro Nagatsuka, Keisuke Ohashi
Cnidaria is an animal phylum, whose members probably have the most ancestral musculature. We prepared and characterized, for the first time to our knowledge, native actomyosin from the striated myoepithelium of the adult moon jelly Aurelia sp. The actomyosin contained myosin, paramyosin-like protein, Ser/Thr-kinase, actin, and two isoforms of tropomyosin, but not troponin, which is known to activate contraction dependent on intracellular Ca2+ signaling in almost all striated muscles of bilaterians. Notably, the myosin comprised striated muscle-type heavy chain and smooth muscle-type regulatory light chains...
May 17, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29773659/modeling-leaderless-transcription-and-atypical-genes-results-in-more-accurate-gene-prediction-in-prokaryotes
#20
Alexandre Lomsadze, Karl Gemayel, Shiyuyun Tang, Mark Borodovsky
In a conventional view of the prokaryotic genome organization, promoters precede operons and RBS sites with Shine-Dalgarno consensus precede genes. However, recent experimental research suggesting a more diverse view motivated us to develop an algorithm with improved gene-finding accuracy. We describe GeneMarkS 2, an ab initio algorithm that uses a model derived by self-training for finding species-specific (native) genes, along with an array of pre-computed "heuristic" models designed to identify harder-to-detect genes (likely horizontally transferred)...
May 17, 2018: Genome Research
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