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Applied Biochemistry and Biotechnology

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https://www.readbyqxmd.com/read/29152695/chitosan-based-surface-molecularly-imprinted-polymer-microspheres-for-sustained-release-of-sinomenine-hydrochloride-in-aqueous-media
#1
Hanqiu Chen, Wen Zhang, Ning Yang, Chongmin Chen, Mingliang Zhang
The surface molecular imprinting technique has been proposed as a prospective strategy for template molecule recognition and separation by devising the recognition sites on the surface of imprinted materials. The purpose of this study was to establish a novel drug delivery system which was developed by surface molecular imprinting method using β-cyclodextrin (β-CD)-grafted chitosan (CS) (CS-g-β-CD) microspheres as matrix and sinomenine hydrochloride (SM) as the template molecule. By adjusting the amount of functional monomer and cross-linking agent, we got the more excellent adsorption of CS-g-β-CD molecularly imprinted polymers (MIPs-CS-g-β-CD)...
November 20, 2017: Applied Biochemistry and Biotechnology
https://www.readbyqxmd.com/read/29152694/rna-seq-analysis-of-antibiotic-producing-bacillus-subtilis-sc-8-reveals-a-role-for-small-peptides-in-controlling-papr-signaling
#2
Byung Wook Yang, In-Cheol Yeo, Jae Hee Choi, Chandra Datta Sumi, Young Tae Hahm
Bacillus subtilis SC-8 (BSSC8) shows a narrow antimicrobial activity against the Bacillus cereus group. Previously, B. cereus-derived PapR as a signal peptide to stimulate PlcR, which plays a significant role in regulating the transcription of virulence factors, was assumed to stimulate antibiotic production in BSSC8. To better understand the functional role of PapR in the antibiotic production of BSSC8 and the interspecies interaction, the global transcriptomic profiling of BSSC8 was investigated using RNA-Seq in this study...
November 20, 2017: Applied Biochemistry and Biotechnology
https://www.readbyqxmd.com/read/29152693/synthesis-of-2-ethylhexyl-palmitate-catalyzed-by-enzyme-under-microwave
#3
Lei Wang, Yang Zhang, Yuxin Zhang, Lu Zheng, He Huang, Zhi Wang
2-Ethylhexyl palmitate has been prepared in organic solvents catalyzed by an immobilized lipase QLM. Microwave irradiation was used to improve the enzyme activity and shorten the reaction time. The reaction conditions under microwave have been optimized. Compared with that of the free QLM under classical heating, the immobilized QLM under microwave exhibited higher enzyme activity and the conversion could achieve 99% in about 3.0 h. Furthermore, the immobilized QLM displayed excellent reusability under microwave irradiation...
November 20, 2017: Applied Biochemistry and Biotechnology
https://www.readbyqxmd.com/read/29150774/co-expression-of-exo-inulinase-and-endo-inulinase-genes-in-the-oleaginous-yeast-yarrowia-lipolytica-for-efficient-single-cell-oil-production-from-inulin
#4
Nianci Shi, Weian Mao, Xiaoxia He, Zhe Chi, Zhenming Chi, Guanglei Liu
Yarrowia lipolytica is a promising platform for the single cell oil (SCO) production. In this study, a transformant X+N8 in which exo- and endo-inulinase genes were co-expressed could produce an inulinase activity of 124.33 U/mL within 72 h. However, the inulinase activity of a transformant X2 carrying a single exo-inulinase gene was only 47.33 U/mL within 72 h. Moreover, the transformant X+N8 could accumulate 48.13% (w/w) SCO from inulin and the cell dry weight reached 13.63 g/L within 78 h, which were significantly higher than those of the transformant X2 (41...
November 18, 2017: Applied Biochemistry and Biotechnology
https://www.readbyqxmd.com/read/29150773/overexpression-of-a-cellobiose-glucose-halotolerant-endoglucanase-from-scytalidium-thermophilum
#5
Luana Parras Meleiro, Sibeli Carli, Raquel Fonseca-Maldonado, Marcela da Silva Torricillas, Ana Lucia Ribeiro Latorre Zimbardi, Richard John Ward, João Atílio Jorge, Rosa Prazeres Melo Furriel
Enzyme reaction products and by-products from pretreatment steps can inhibit endoglucanases and are major factors limiting the efficiency of enzymatic lignocellulosic biomass hydrolysis. The gene encoding the endoglucanase from Scytalidium thermophilum (egst) was cloned and expressed as a soluble protein in Pichia pastoris GS115. The recombinant enzyme (Egst) was monomeric (66 kDa) and showed an estimated carbohydrate content of 53.3% (w/w). The optimum temperature and pH of catalysis were 60-70 °C and pH of 5...
November 18, 2017: Applied Biochemistry and Biotechnology
https://www.readbyqxmd.com/read/29134510/drug-design-for-alk-positive-nsclc-an-integrated-pharmacophore-based-3d-qsar-and-virtual-screening-strategy
#6
Nivya James, V Shanthi, K Ramanathan
The increasing death rates related to anaplastic lymphoma kinase (ALK)-positive lung cancer culminated in a significant interest in the discovery of novel inhibitors for ALK. In the present research work, pharmacophore-based 3D QSAR modeling and virtual screening strategy have been carried out to address these issues. Initially, a five-point pharmacophore model was developed using the biological data of 50 compounds which includes an FDA-approved ALK inhibitor, crizotinib. Using the generated pharmacophore, a 3D QSAR model was developed and used as a query to screen the DrugBank database...
November 13, 2017: Applied Biochemistry and Biotechnology
https://www.readbyqxmd.com/read/29134509/selection-of-an-effective-indicator-for-rapid-detection-of-microorganisms-producing-%C3%AE-polyglutamic-acid-and-its-biosynthesis-under-submerged-fermentation-conditions-using-bacillus-methylotrophicus
#7
Poonam Mishra Chatterjee, Silpi Datta, Deepika Pandey Tiwari, Ritu Raval, Ashok Kumar Dubey
γ-Polyglutamic acid (γ-PGA) is a biosynthetic outcome of glutamic acid polymerization by microbes. In the current study, we have isolated Bacillus methylotrophicus on solid differential media containing methylene blue. This is the first report mentioning the use of methylene blue to distinguish the monomeric and polymeric form of glutamic acid in the liquid medium using UV-Vis spectrophotometer. Our method can simplify the analytical process of γ-PGA confirmation using the aforementioned studies. This screening protocol is sensitive to the detection of γ-PGA quantities as low as 3 μg/mL; thus, the potent producers can be effectively screened...
November 13, 2017: Applied Biochemistry and Biotechnology
https://www.readbyqxmd.com/read/29127540/evaluation-of-lighting-systems-carbon-sources-and-bacteria-cultures-on-photofermentative-hydrogen-production
#8
Chengcheng Hu, Sing-Ying Choy, Apostolos Giannis
Fluorescent and incandescent lighting systems were applied for batch photofermentative hydrogen production by four purple non-sulfur photosynthetic bacteria (PNSB). The hydrogen production efficiency of Rhodopseudomonas palustris, Rhodobacter sphaeroides, Rhodobacter capsulatus, and Rhodospirillum rubrum was evaluated using different carbon sources (acetate, butyrate, lactate, and malate). Incandescent light was found to be more effective for bacteria cell growth and hydrogen production. It was observed that PNSB followed substrate selection criteria for hydrogen production...
November 10, 2017: Applied Biochemistry and Biotechnology
https://www.readbyqxmd.com/read/29124656/enzymatic-activation-of-the-emerging-drug-resveratrol
#9
Rina D Koyani, Rafael Vazquez-Duhalt
The plant originated stilbene "resveratrol" (3,4',5-trans-trihydroxystilbene) is well known for its diverse health benefits including anti-tumor, anti-inflammatory, anti-microbial, and anti-oxidant properties. Besides a significant amount of reports on different aspects of its application as prodrug in the last 50 years, still, a strategy leading to the production of the active drug is missing. The aim of this work was to evaluate the enzymatic activation of prodrug resveratrol to the effective drug piceatannol, without engaging expensive cofactors...
November 9, 2017: Applied Biochemistry and Biotechnology
https://www.readbyqxmd.com/read/29124655/enhanced-bioactivity-of-the-anti-lox-1-scfv-engineered-by-multimerization-strategy
#10
Wei Hu, Qiuhong Xie, Ling Liu, Hongyu Xiang
Single-chain variable fragment (scFv) antibodies as therapeutic agents have the potential to reduce the production cost and immunogenicity relative to monoclonal antibodies, but their monovalency and lack of a fragment crystallizable region can lead to reduced function. Multimerization is one strategy for recovering the function; however, their application is limited by the production of multimeric proteins. In our previous study, an anti-lectin-like oxidized low-density lipoprotein receptor-1 (LOX-1) scFv showed potential use in diagnosis and therapy of atherosclerotic diseases, but is limited by its inherent low antigen-binding activity...
November 9, 2017: Applied Biochemistry and Biotechnology
https://www.readbyqxmd.com/read/29124654/meta-analysis-of-microbial-fuel-cells-using-waste-substrates
#11
F Ryan Dowdy, Ryan Kawakita, Matthew Lange, Christopher W Simmons
Microbial fuel cell experimentation using waste streams is an increasingly popular field of study. One obstacle to comparing studies has been the lack of consistent conventions for reporting results such that meta-analysis can be used for large groups of experiments. Here, 134 unique microbial fuel cell experiments using waste substrates were compiled for analysis. Findings include that coulombic efficiency correlates positively with volumetric power density (p < 0.001), negatively with working volume (p < 0...
November 9, 2017: Applied Biochemistry and Biotechnology
https://www.readbyqxmd.com/read/29110175/optimization-and-verification-of-droplet-digital-pcr-even-specific-methods-for-the-quantification-of-gm-maize-das1507-and-nk603
#12
Katarzyna Grelewska-Nowotko, Magdalena Żurawska-Zajfert, Ewelina Żmijewska, Sławomir Sowa
In recent years, digital polymerase chain reaction (dPCR), a new molecular biology technique, has been gaining in popularity. Among many other applications, this technique can also be used for the detection and quantification of genetically modified organisms (GMOs) in food and feed. It might replace the currently widely used real-time PCR method (qPCR), by overcoming problems related to the PCR inhibition and the requirement of certified reference materials to be used as a calibrant. In theory, validated qPCR methods can be easily transferred to the dPCR platform...
November 6, 2017: Applied Biochemistry and Biotechnology
https://www.readbyqxmd.com/read/29101734/production-of-bio-ethanol-by-integrating-microwave-assisted-dilute-sulfuric-acid-pretreated-sugarcane-bagasse-slurry-with-molasses
#13
Na Yu, Li Tan, Zhao-Yong Sun, Yue-Qin Tang, Kenji Kida
Sugarcane bagasse (SCB) and molasses, known as carbohydrate-rich biomass derived from sugar production, can serve as feedstock for bio-ethanol production. To establish a simple process, the production of bio-ethanol through integration of whole pretreated slurry (WPS) of SCB with molasses was investigated. The results showed that microwave-assisted dilute sulfuric acid pretreatment reduced the formation of toxic compounds compared to a pretreatment process involving "conventional heating". Pretreatment at 180 (o)C with 10% w v(-1) solid loading and 0...
November 4, 2017: Applied Biochemistry and Biotechnology
https://www.readbyqxmd.com/read/29101733/bioprocessing-of-biodiesel-industry-effluent-by-immobilized-bacteria-to-produce-value-added-products
#14
Jyotsana Prakash, Rahul Kumar Gupta, Priyanka Xx, Vipin Chandra Kalia
Biodiesel industrial effluent rich in crude glycerol (CG) was processed to produce value-added product. Under continuous culture system, Bacillus amyloliquefaciens strain CD16 immobilized within its biofilm, produced 3.2 L H2/day/L feed, over a period of 60 days at a hydraulic retention time of 2 days. The effective H2 yield by B. amyloliquefaciens strain CD16 was 165 L/L CG. This H2 yield was 1.18-fold higher than that observed with non-biofilm forming Bacillus thuringiensis strain EGU45. Bioprocessing of the effluent released after this stage, by recycling it up to 25% did not have any adverse effect on H2 production by strain EGU45; however, a 25% reduction in yield was recorded with strain CD16...
November 4, 2017: Applied Biochemistry and Biotechnology
https://www.readbyqxmd.com/read/29098561/single-cell-protein-and-xylitol-production-by-a-novel-yeast-strain-candida-intermedia-fl023-from-lignocellulosic-hydrolysates-and-xylose
#15
Jiaqiang Wu, Jinlong Hu, Shumiao Zhao, Mingxiong He, Guoquan Hu, Xiangyang Ge, Nan Peng
Yeasts are good candidates to utilize the hydrolysates of lignocellulose, the most abundant bioresource, for bioproducts. This study aimed to evaluate the efficiencies of single-cell protein (SCP) and xylitol production by a novel yeast strain, Candida intermedia FL023, from lignocellulosic hydrolysates and xylose. This strain efficiently assimilated hexose, pentose, and cellubiose for cell mass production with the crude protein content of 484.2 g kg(-1) dry cell mass. SCP was produced by strain FL023 using corncob hydrolysate and urea as the carbon and nitrogen sources with the dry cell mass productivity 0...
November 2, 2017: Applied Biochemistry and Biotechnology
https://www.readbyqxmd.com/read/29098560/promoter-methylation-of-rassf1a-gene-in-egyptian-patients-with-ovarian-cancer
#16
Noha A Rezk, Rasha H Mohamed, Amr AbdAlmohsen Alnemr, Mervat Harira
Ovarian malignancy is diagnosed in nearly a fourth of a million women internationally every year. Methylation of RASSF1A tumor suppressor gene prompts its inactivation in diseases. In this study, the RASSF1A promoter methylation was detected by methylated-specific PCR and investigated serum RASSF1A protein level through enzyme-linked immunosorbant assay in 160 Egyptian patients with ovarian cancer and 160 healthy controls. The present work proved that there was a higher frequency of RASSF1A methylation and a decrease in its serum level in patients with ovarian cancer compared to controls as well as in the high-grade tumor patients compared to low grade ones and also in advanced ovarian tumor stage compared to early stages...
November 2, 2017: Applied Biochemistry and Biotechnology
https://www.readbyqxmd.com/read/29098559/analysis-of-the-genome-and-chromium-metabolism-related-genes-of-serratia-sp-s2
#17
Lanlan Dong, Simin Zhou, Yuan He, Yan Jia, Qunhua Bai, Peng Deng, Jieying Gao, Yingli Li, Hong Xiao
This study is to investigate the genome sequence of Serratia sp. S2. The genomic DNA of Serratia sp. S2 was extracted and the sequencing library was constructed. The sequencing was carried out by Illumina 2000 and complete genomic sequences were obtained. Gene function annotation and bioinformatics analysis were performed by comparing with the known databases. The genome size of Serratia sp. S2 was 5,604,115 bp and the G+C content was 57.61%. There were 5373 protein coding genes, and 3732, 3614, and 3942 genes were respectively annotated into the GO, KEGG, and COG databases...
November 2, 2017: Applied Biochemistry and Biotechnology
https://www.readbyqxmd.com/read/29098558/radiosynthesis-and-biodistribution-of-99m-tc-metronidazole-as-an-escherichia-coli-infection-imaging-radiopharmaceutical
#18
Anam Iqbal, Syed Ali Raza Naqvi, Rashid Rasheed, Asim Mansha, Matloob Ahmad, Ameer Fawad Zahoor
Bacterial infection poses life-threatening challenge to humanity and stimulates to the researchers for developing better diagnostic and therapeutic agents complying with existing theranostic techniques. Nuclear medicine technique helps to visualize hard-to-diagnose deep-seated bacterial infections using radionuclide-labeled tracer agents. Metronidazole is an antiprotozoal antibiotic that serves as a preeminent anaerobic chemotherapeutic agent. The aim of this study was to develop technetium-99m-labeled metronidazole radiotracer for the detection of deep-seated bacterial infections...
November 2, 2017: Applied Biochemistry and Biotechnology
https://www.readbyqxmd.com/read/29082481/physical-pretreatment-methods-for-improving-microalgae-anaerobic-biodegradability
#19
Olivia Córdova, Fabiana Passos, Rolando Chamy
Microalgae may be a potential feedstock for biogas production through anaerobic digestion. However, this process is limited by the hydrolytic stage, due to the complex and resistant microalgae cell wall components. This fact hinders biomass conversion into biogas, demanding the application of pretreatment techniques for inducing cell damage and/or lysis and organic matter solubilisation. In this study, sonication, thermal, ultrasound, homogeneizer, hydrothermal and steam explosion pretreatments were evaluated in different conditions for comparing their effects on anaerobic digestion performance in batch reactors...
October 30, 2017: Applied Biochemistry and Biotechnology
https://www.readbyqxmd.com/read/29082480/a-comparative-study-of-receptor-targeted-magnetosome-and-hsa-coated-iron-oxide-nanoparticles-as-mri-contrast-enhancing-agent-in-animal-cancer-model
#20
Ebru Erdal, Murat Demirbilek, Yasan Yeh, Öznur Akbal, Laura Ruff, Damla Bozkurt, Ahmet Cabuk, Yasin Senel, Berrak Gumuskaya, Oktay Algın, Seyda Colak, Sadık Esener, Emir B Denkbas
Magnetosomes are specialized organelles arranged in intracellular chains in magnetotactic bacteria. The superparamagnetic property of these magnetite crystals provides potential applications as contrast-enhancing agents for magnetic resonance imaging. In this study, we compared two different nanoparticles that are bacterial magnetosome and HSA-coated iron oxide nanoparticles for targeting breast cancer. Both magnetosomes and HSA-coated iron oxide nanoparticles were chemically conjugated to fluorescent-labeled anti-EGFR antibodies...
October 30, 2017: Applied Biochemistry and Biotechnology
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