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https://www.readbyqxmd.com/read/28651380/utilization-of-acid-pre-treated-coconut-dregs-as-a-substrate-for-production-of-detergent-compatible-lipase-by-bacillus-stratosphericus
#1
Nur Bainun Mohd Zin, Busyra Mohamad Yusof, Siti Nurbaya Oslan, Helmi Wasoh, Joo Shun Tan, Arbakariya B Ariff, Murni Halim
In recent years, many efforts have been directed to explore the methods to reduce the production costs of industrial lipase by improving the yield and the use of low-cost agricultural wastes. Coconut dregs, which is a lignocellulosic by-product from coconut oil and milk processing plants, is rich in cellulose (36%) and crude fat (9%). A newly isolated Bacillus stratosphericus has been demonstrated to perform cellulose hydrolysis on coconut dregs producing fermentable sugars. The highest extracellular lipase activity of 140 U/mL has been achieved in submerged fermentation with acid pre-treated coconut dregs...
December 2017: AMB Express
https://www.readbyqxmd.com/read/28651192/efficient-photocatalytic-degradation-of-toxic-dyes-from-aqueous-environment-using-gelatin-zr-iv-phosphate-nanocomposite-and-its-antimicrobial-activity
#2
Manita Thakur, Gaurav Sharma, Tansir Ahamad, Ayman A Ghfar, Deepak Pathania, Mu Naushad
In the present study, gelatin-Zr(IV) phosphate nanocomposite (GT/ZPNC) was synthesized by sol-gel method by mixing the gelatin gel into the inorganic part Zr (IV) phosphate (ZP). The GT/ZPNC was characterized by Fourier transform infrared spectroscopy, thermogravimetric analysis, scanning electron microscopy (SEM), transmission electron micron scope (TEM), X-ray powder diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). The photodegradation activity of GT/ZPNC was explored for the removal of methylene blue (MB) and fast green (FG) dyes from aqueous solution...
June 20, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/28651163/ex-vivo-assessment-of-valve-thickness-calcification-of-patients-with-calcific-aortic-stenosis-in-relation-to-in-vivo-clinical-outcomes
#3
Ching-Li Cheng, Hsiao-Huang Chang, Pei-Jung Huang, Wei-Chen Wang, Shan-Yang Lin
Calcific aortic stenosis (AS) plays a critical role in the risk of cardiovascular disease. This preliminary study examined the relationship between the ex vivo valve thickness/calcification and in vivo clinical outcomes of Chinese patients with calcific AS. Six Chinese patients (3 patients with tricuspid aortic valves (TAV)) and 3 patients with. bicuspid aortic valves (BAV) with calcific AS undergoing heart valve replacement were initially chosen for this study. In vivo medical imaging of these calcific AS patients was evaluated using computed tomography and echocardiography...
June 22, 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/28650979/expression-of-cerebral-serotonin-related-to-anxiety-like-behaviors-in-c57bl-6-offspring-induced-by-repeated-subcutaneous-prenatal-exposure-to-low-dose-lipopolysaccharide
#4
Pei-Tan Hsueh, Hsuan-Han Wang, Chiu-Lin Liu, Wei-Fen Ni, Ya-Lei Chen, Jong-Kang Liu
Prenatal exposure to lipopolysaccharide (LPS), which likely occurs due to infection or contact with environmental allergens during pregnancy, is a proposed risk factor that induces anxiety- and autism spectrum disorder-like behaviors in offspring. However, the molecular and behavioral changes in offspring after maternal immune activation have not been completely identified. We hypothesized that a subcutaneous injection of LPS in a pregnant mouse would induce changes in cerebral serotonin (5-HT) in parallel to the appearance of anxiety-like behaviors in the dam's offspring...
2017: PloS One
https://www.readbyqxmd.com/read/28650787/the-effect-of-casein-phosphopeptide-amorf-calcium-phosphate-and-acidulated-phosphate-fluoride-gel-on-dental-erosion-in-primary-teeth-an-in-vitro-study
#5
Eda Arat Maden, Özge Acar, Ceyhan Altun, Günseli Güven Polat
OBJECTIVE: This study aimed to investigate the effect of acidulated phosphate fluoride (APF) gel and casein phosphopeptide/amorphous calciumphosphate (CPP-ACP) on the dental erosion produced by carbonated soft drink in primary teeth. STUDY DESIGN: This study evaluated by an in vitro model the effect of APF gel and CPP-ACP on the dental enamel previously subjected to erosive challenge with carbonated soft drink. Sixty sound human primary molars were prepared by embedding the crown sections in acrylic resin blocks leaving the enamel surfaces exposed...
2017: Journal of Clinical Pediatric Dentistry
https://www.readbyqxmd.com/read/28650609/a-pom-constructed-from-super-sodalite-cage-with-extra-large-24-membered-channels-as-effective-sorbent-for-uranium-adsorption
#6
Yayu Dong, Zhimin Dong, Zhibin Zhang, Yunhai Liu, Weiwei Cheng, Hao Miao, Xingxiang He, Yan Xu
A novel POMs-based sorbent functionalized by phosphate groups: H33Na14MoV24MoVI2(PO4)11O73 has been successfully isolated under hydrothermal conditions. The cooperative assembly of the ring-shaped polyoxometalate structural building unit {P4Mo6} and MoO4 tetrahedra linkers gives rise to an unprecedented super-sodalite cage containing approximately spherical cavities with a 8.76 Å diameter. As POMs-based inorganic material, compound 1 was first applied as sorbent to adsorb U(VI) from aqueous solution, exhibiting good stability, high efficient and selectivity...
June 26, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28650523/characterization-of-the-phosphate-specific-transport-system-in-cronobacter-sakazakii-baa-894
#7
Xiujun Liang, Xiaoqing Hu, Xiaoyuan Wang, Jianli Wang, Yu Fang, Yanyan Li
AIMS: Characterize the phosphate-specific transport system in Cronobacter sakazakii BAA-894. METHODS AND RESULTS: The genes relevant to phosphate transfer in C. sakazakii BAA-894 were determined by using sequence alignment to the corresponding genes in Escherichia coli. Then, the determined pst operon in C. sakazakii BAA-894 was deleted using the lambda Red recombination system. Using the wild type C. sakazakii BAA-894 as a control, the membrane permeability, auto-aggregation, exopolysaccharide biosynthesis, biofilm formation, and adhesion ability of the mutant △pst grown in media containing high or low concentrations of phosphate were investigated; stronger auto-aggregation, less biofilm formation and higher adhesion ability were observed in △pst cells grown in low phosphate media...
June 26, 2017: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/28650490/hypoxia-induced-tumor-cell-resistance-is-overcome-by-synergistic-gapdh-sirna-and-chemotherapy-co-delivered-by-long-circulating-and-cationic-interior-liposomes
#8
Jibin Guan, Jin Sun, Feilong Sun, Bo Lou, Dong Zhang, Vida Mashayekhi, Negar Sadeghi, Gert Storm, Enrico Mastrobattista, Zhonggui He
Chemotherapeutic drug resistance of tumor cells under hypoxic conditions is caused by the inhibition of apoptosis by autophagy and drug efflux via adenosine triphosphate (ATP)-dependent transporter activation, among other factors. Here, we demonstrate that disrupting glyceraldehyde-3-phosphate dehydrogenase (GAPDH) expression can reduce the autophagy and ATP levels in tumor cells. To test whether GAPDH knockdown is sufficient to overcome drug resistance, a nanocarrier (asymmetry-membrane liposome) was designed to encapsulate GAPDH-siRNA with a low dose of paclitaxel (PTX)...
June 26, 2017: Nanoscale
https://www.readbyqxmd.com/read/28650314/natrinema-soli-sp-nov-a-novel-halophilic-archaeon-isolated-from-a-hypersaline-wetland
#9
Mehrnoosh Rasooli, Ali Naghoni, Mohammad Ali Amoozegar, Leila Mirfeizi, Mahdi Moshtaghi Nikou, Seyed Abolhassan Shahzadeh Fazeli, Hiroaki Minegishi, Antonio Ventosa
An extremely halophilic archaeon, designated strain 5-3T, was isolated from a soil sample of Meighan wetland in Iran. Strain 5-3T was strictly aerobic, catalase-positive and oxidase-negative. Cells were Gram-stain-negative, non-motile and ovoid. Colonies of strain 5-3T were cream-coloured. The isolate showed optimum growth at 4.0 M NaCl, 40 °C and pH 7.0. The major polar lipids of the strain were phosphatidylglycerol, phosphatidylglycerol phosphate methyl ester, two unknown phospholipids and three glycolipids (including one that was chromatographically identical to S2-DGD)...
June 26, 2017: International Journal of Systematic and Evolutionary Microbiology
https://www.readbyqxmd.com/read/28650156/discovery-of-a-glutamine-kinase-required-for-the-biosynthesis-of-the-o-methyl-phosphoramidate-modifications-found-in-the-capsular-polysaccharides-of-campylobacter-jejuni
#10
Zane W Taylor, Haley A Brown, Tamari Narindoshvili, Cory Q Wenzel, Christine Szymanski, Hazel M Holden, Frank M Raushel
Bacterial capsular polysaccharides (CPS) are complex carbohydrate structures that play a role in the overall fitness of the organism. Campylobacter jejuni, known for being a major cause of bacterial gastroenteritis worldwide, produces a CPS with a unique O-methyl phosphoramidate (MeOPN) modification on specific sugar residues. The formation of P-N bonds in nature is relatively rare and the pathway for the assembly of the phosphoramidate moiety in the CPS of C. jejuni is unknown. In this investigation we discovered that the initial transformation in the biosynthetic pathway for the MeOPN modification of the CPS involves the direct phosphorylation of the amide nitrogen of L-glutamine with ATP by the catalytic activity of Cj1418...
June 26, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28650069/transcriptional-engineering-of-the-glyceraldehyde-3-phosphate-dehydrogenase-promoter-for-improved-heterologous-protein-production-in-pichia-pastoris
#11
Özge Ata, Roland Prielhofer, Brigitte Gasser, Diethard Mattanovich, Pınar Çalık
The constitutive glyceraldehyde-3-phosphate dehydrogenase promoter (PGAP ), which is one of the benchmark promoters of Pichia pastoris, was analyzed in terms of putative transcription factor binding sites. We constructed a synthetic library with distinct regulatory properties through deletion and duplication of these putative transcription factor binding sites and selected transcription factor (TF) genes were overexpressed or deleted to understand their roles on heterologous protein production. Using enhanced green fluorescent protein, an expression strength in a range between 0...
June 26, 2017: Biotechnology and Bioengineering
https://www.readbyqxmd.com/read/28650051/low-temperature-photoluminescence-properties-of-cspbbr3-quantum-dots-embedded-in-glasses
#12
Bing Ai, Chao Liu, Zhao Deng, Jing Wang, Jianjun Han, Xiujian Zhao
The photoluminescence properties of perovskite CsPbBr3 QDs embedded in glasses were investigated at cryogenic temperature in the range of 40-240 K. CsPbBr3 QDs with radii of 3.3 nm, 4.2 nm and 4.8 nm were precipitated in phosphate glasses using conventional thermal treatment. Photoluminescence (PL) integral intensities, bandgap energies and full with at half maximum of the PL bands of CsPbBr3 QDs showed a strong dependence on temperature. An exciton binding energy of ∼40 meV was derived from the temperature-dependent emission intensity...
June 26, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28650023/ligand-induced-conformational-preorganization-of-loops-of-c-myc-g-quadruplex-dna-and-its-implications-in-structure-specific-drug-design
#13
S Harikrishna, Saikiran Kotaru, P I Pradeepkumar
Stabilization of a G-quadruplex (G4) DNA structure in the proto-oncogene c-MYC using small molecule ligands has emerged as an attractive strategy for the development of anticancer therapeutics. To understand the subtle structural changes in the G4 structure upon ligand binding, molecular dynamics (MD) simulations of c-MYC G4 DNA were carried out in a complex with six different potent ligands: 3AQN, 6AQN, 3APN, 360A, Nap-Et, and Nap-Pr. The results show that the ligands 3AQN, 6AQN, 3APN, and 360A stabilize the G4 structure by making stacking interactions with the top quartet...
June 26, 2017: Molecular BioSystems
https://www.readbyqxmd.com/read/28650005/sub-picomolar-label-free-detection-of-thrombin-using-electrochemical-impedance-spectroscopy-of-aptamer-functionalized-mos2
#14
Kai-Chun Lin, Badrinath Jagannath, Sriram Muthukumar, Shalini Prasad
An ultrasensitive aptasensor for the label free non-faradaic detection of thrombin has been demonstrated on molybdenum disulphide (MoS2) nanosheets. These nanosheets were physiochemically immobilized onto a silicon micro-electrode platform. Thrombin detection was achieved through the charge modulation of the electrical double layer due to the specific and dose dependent binding of thrombin to the surface of thiol terminated ssDNA aptamer functionalized MoS2 nanosheets. Electrical double layer charge modulation associated with thrombin binding was characterized using electrochemical impedance spectroscopy...
June 26, 2017: Analyst
https://www.readbyqxmd.com/read/28649828/dimerization-of-the-conserved-n-terminal-domain-of-a-spider-silk-protein-controls-the-self-assembly-of-the-repetitive-core-domain
#15
Joschka Bauer, Thomas Scheibel
Spider silk proteins comprise a repetitive core domain with polyalanine and glycine/proline stretches flanked by highly conserved nonrepetitive N- and C-terminal domains. The termini are responsive to assembly triggers, sensing changes in the ionic (H+, phosphate) and mechanical (shear stress) environment along the spinning duct. Upon assembly, the N-terminal domain dimerizes in a pH-dependent manner induced by protonation of conserved acidic residues. So far, dimerization of N-terminal spider silk domains has been individually investigated in the absence of large core domains...
June 26, 2017: Biomacromolecules
https://www.readbyqxmd.com/read/28649560/escaping-death-mitochondrial-redox-homeostasis-in-cancer-cells
#16
REVIEW
Francesco Ciccarese, Vincenzo Ciminale
Reactive oxygen species (ROS) are important signaling molecules that act through the oxidation of nucleic acids, proteins, and lipids. Several hallmarks of cancer, including uncontrolled proliferation, angiogenesis, and genomic instability, are promoted by the increased ROS levels commonly found in tumor cells. To counteract excessive ROS accumulation, oxidative stress, and death, cancer cells tightly regulate ROS levels by enhancing scavenging enzymes, which are dependent on the reducing cofactor nicotinamide adenine dinucleotide phosphate (NADPH)...
2017: Frontiers in Oncology
https://www.readbyqxmd.com/read/28649124/a-modified-bowel-preparation-regimen-for-colonoscopy-providing-the-patients-satisfaction-and-convenience
#17
Chia-Cheng Wen, Shu-Wen Jao, Cheng-Wen Hsiao
BACKGROUND A complete cleansing of the bowel is a critical factor that impacts the diagnostic accuracy of colonoscopies. However, the common bowel preparation regimen of two 45 mL doses of sodium phosphate (2×NaP) often leads to uncomfortable symptoms and subsequently lower patient adherence. To improve patient adherence and satisfaction, we proposed a modified regimen composed of two sennoside tablets and one bottle of NaP (S+NaP) and we then evaluated bowel preparation quality and patient satisfaction. MATERIAL AND METHODS A total of 531 patients who underwent colonoscopies at the outpatient coloproctology clinic from January 2016 to December 2016 were retrospectively reviewed...
June 26, 2017: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/28648734/drug-induced-hemolytic-anemia-pharmacological-aspects
#18
D Renard, A Rosselet
Drug-induced hemolytic anemia is a very rare but potentially lethal adverse drug reaction, which can take the form of oxidative damage to vulnerable erythrocytes (as in glucose-6-phosphate dehydrogenase deficiency), drug-induced thrombotic microangiopathy, or immune-mediated hemolytic anemia. For each form, distinctive drugs are documented as potential triggers. When a formal diagnosis of hemolytic anemia is made following drug administration, a structured approach is recommended to assess the plausibility of an adverse drug reaction based on chronological sequence, epidemiological data, objective evidence (when available), and ruling out of non-drug causes...
June 22, 2017: Transfusion Clinique et Biologique: Journal de la Société Française de Transfusion Sanguine
https://www.readbyqxmd.com/read/28648680/reversibly-constraining-spliceosome-substrate-complexes-by-engineering-disulfide-crosslinks
#19
Patrick McCarthy, Erin Garside, Yonatan Meschede-Krasa, Andrew MacMillan, Daniel Pomeranz Krummel
The spliceosome is a highly dynamic mega-Dalton enzyme, formed in part by assembly of U snRNPs onto its pre-mRNA substrate transcripts. Early steps in spliceosome assembly are challenging to study biochemically and structurally due to compositional and conformational dynamics. We detail an approach to covalently and reversibly constrain or trap non-covalent pre-mRNA/protein spliceosome complexes. This approach involves engineering a single disulfide bond between a thiol-bearing cysteine sidechain and a proximal backbone phosphate of the pre-mRNA, site-specifically modified with an N-thioalkyl moiety...
June 22, 2017: Methods: a Companion to Methods in Enzymology
https://www.readbyqxmd.com/read/28648675/segregation-of-phosphatidylinositol-4-phosphate-and-phosphatidylinositol-4-5-bisphosphate-into-distinct-microdomains-on-the-endosome-membrane
#20
Akane Yoshida, Hiroki Hayashi, Kenji Tanabe, Akikazu Fujita
Phosphatidylinositol 4-phosphate (PtdIns(4)P) is the immediate precursor of phosphatidylinositol 4,5-bisphosphate (PtdIns(4,5)P2), which is located on the cytoplasmic leaflet of the plasma membrane and has been reported to possess multiple cellular functions. Although PtdIns(4)P and PtdIns(4,5)P2 have been reported to localize to multiple intracellular compartments and to each function as regulatory molecules, their generation, regulation and functions in most intracellular compartments are not well-defined...
June 22, 2017: Biochimica et Biophysica Acta
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