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https://www.readbyqxmd.com/read/28454333/a-polysaccharide-component-from-strongylocentrotus-nudus-eggs-inhibited-hepatocellular-carcinoma-in-mice-by-activating-t-lymphocytes
#1
Min Zhang, Yang Liu, Jingwen Li, Mengyun Ke, Jie Yu, Jie Dou, Hui Wang, Changlin Zhou
A component purified from Strongylocentrotus nudus eggs on a diethylaminoethyl cellulose-52 chromatography column and eluted using a NaCl solution gradient (SEP-S), is a homogeneous polysaccharide of α-D-glucan with a reduced molecular weight of 9.33×10(5) Da, compared with that of S. nudus egg polysaccharide (SEP). In an in vivo antitumor assay of histocompatibility-22 hepatocellular carcinoma in tumor-bearing mice, the inhibitory rates at SEP-S doses of 5, 10 and 20 mg/kg/day were 38.8, 50.7 and 70.3%, respectively...
March 2017: Oncology Letters
https://www.readbyqxmd.com/read/28454179/simple-effective-medium-approximation-with-rayleigh-scattering
#2
Ashfaqul Anwar Siraji, Yang Zhao
We present a simple analytical effective medium approximation (EMA) that can account for finite-sized and interacting inclusions in the Rayleigh scattering regime. The polarizability of an individual inclusion is calculated using the Mie solution and net polarizability is formed, leading to effective parameters. The Mie coefficients are expanded into polynomials and curtailed to the sixth order, which is accurate in the Rayleigh regime. Results obtained using the developed models are compared with experimental results and existing EMAs...
May 1, 2017: Optics Letters
https://www.readbyqxmd.com/read/28454078/new-complexes-of-cu-ii-with-dipicolinate-and-pyridyl-based-ligands-an-experimental-and-dft-approach
#3
Florencia Luzardo, Natalia Álvarez, Carlos Kremer, Andrea S S de Camargo, Jorge S Gancheff
The three novel mononuclear copper(II) complexes with dipicolinate and pyridyl-based ligands [Cu(dipic)(L)(OH2)] (L=4-picoline, vinylpyridine, 4-styrylpyridine; dipic(2-)=dipicolinate) were afforded and structurally characterized. X-ray diffraction studies accounted for slight distorted square-pyramidal structures in which the dianion dipic(2-) acts as a tridentate ligand in a mer-fashion, the N-donor species occupy an in-plane position, and a water molecule was detected apically coordinated. To assess the effect of the nature of the pyridyl-substituent (para position) on electronic properties, other complexes were also synthesized: [Cu(dipic)(py)(OH2)], [{Cu(dipic)(OH2)}2(μ-pyz)] and [{Cu(dipic)(OH2)}(μ-pypy){Cu(dipic)}] (py=pyridine, pyz=pyrazine, pypy=(E)-1,2-bis(pyridine-4-yl)ethane)...
April 8, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/28454076/carbazole-based-nanoprobe-for-selective-recognition-of-fe-3-ion-in-aqueous-medium-spectroscopic-insight
#4
Sonali B Suryawanshi, Prasad G Mahajan, Anita J Bodake, Govind B Kolekar, Shivajirao R Patil
A simple carbazole based nanoprobe prepared by reprecipitation method shows selective sensing behavior for Fe(3+) ion in aqueous medium. The prepared SDS capped 9-phenyl carbazole nanoparticles (9-PCzNPs) has narrower particle size distribution with an average diameter 35nm and zeta potential of -34.3mV predicted a good stability with negative surface charge over the nanoparticles. The Field Emission Scanning Electron Microscopy (FE-SEM) image showed cubic shape morphology of nanoparticles. The aqueous suspension of SDS capped 9-phenyl carbazole nanoparticles exhibited aggregation induced enhanced red shifted intense emission in comparison with the emission arising from dilute solution of 9-phenyl carbazole in DCM...
April 18, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/28454075/a-novel-highly-sensitive-selective-reversible-and-turn-on-chemi-sensor-based-on-schiff-base-for-rapid-detection-of-cu-ii
#5
Sayed M Saleh, Reham Ali, Ibrahim A I Ali
In this work, a novel optical fluoro-chemisensor was designed and synthesized for copper (II) ions detection. The sensor film is created by embedded N,N-Bis(2-hydroxo-5-bromobenzyl)ethylenediamine in poly vinyl chloride (PVC) film in presence of dioctyl phthalate (DOP) as plasticizer. The receptor Schiff base reveals "off-on" mode with high selectivity, significant sensitivity to Cu(II) ions. The selectivity of optical sensor for Cu(II) ions is the result of chelation enhanced fluorescence (CHEF). The optimal conditions of pH and response time at which higher efficiency of sensor film is performed was found to be 6...
April 20, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/28454074/photocatalytic-degradation-of-dye-using-ceo2-scb-composite-catalysts
#6
Duangdao Channei, Auppatham Nakaruk, Sukon Phanichphant
The main task of the present work is to enhance the photocatalytic degradation efficiency of methylene blue (MB) by using CeO2/sugarcane bagasse (SCB) composite catalysts. Homogeneous precipitation method was used to synthesis CeO2-SCB composite catalysts by adding SCB powder to precursor solution of Ce base-metal. The structural analytical data indicated the pure cubic fluorite structure of CeO2. Morphological images revealed the coating of CeO2 layer on high surface area of SCB core-shell. The chemical analysis presented spectrum of the Ce 3d in CeO2/SCB sample existed in the form of the Ce(3+) and Ce(4+) mixed- valence states...
April 22, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/28454068/biochar-based-water-treatment-systems-as-a-potential-low-cost-and-sustainable-technology-for-clean-water-provision
#7
REVIEW
Willis Gwenzi, Nhamo Chaukura, Chicgoua Noubactep, Fungai N D Mukome
Approximately 600 million people lack access to safe drinking water, hence achieving Sustainable Development Goal 6 (Ensure availability and sustainable management of water and sanitation for all by 2030) calls for rapid translation of recent research into practical and frugal solutions within the remaining 13 years. Biochars, with excellent capacity to remove several contaminants from aqueous solutions, constitute an untapped technology for drinking water treatment. Biochar water treatment has several potential merits compared to existing low-cost methods (i...
April 25, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28454062/self-assembled-dehydropeptide-nano-carriers-for-delivery-of-ornidazole-and-curcumin
#8
Smriti Rekha Deka, Santosh Yadav, Dheeresh Kumar, Sumit Garg, Manohar Mahato, Ashwani Kumar Sharma
In the recent studies, it has been demonstrated that incorporation of unnatural amino acid, α,β-dehydrophenylalanine, in small peptides results in stable self-assembled nanostructures with different sizes and shapes. Here, we have replaced the natural amino acid, phenylalanine, from our earlier reported work on self-assembled peptide, Boc-Pro-Phe-Gly-OMe, with a constrained dehydro amino acid, α,β-dehydrophenylalanine, to study its influence on self-assembled nanostructures. Dehydrotripeptide, Boc-Pro-ΔPhe-Gly-OMe, self-assembled into nanostructures in aqueous solutions and formed hydrophobic matrix with improved encapsulation efficiency of hydrophobic molecules...
April 20, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/28454019/adsorption-of-carbon-dots-onto-al2o3-in-aqueous-experimental-and-theoretical-studies
#9
Xia Liu, Jiaxing Li, Xiaohua Wu, Zhi Zeng, Xianlong Wang, Tasawar Hayat, Xiaodong Zhang
Increasing interests in carbon dots (CDs) research resulted in the increased production of CDs and the risk to be released into the environment, including surface water and groundwater. To assess the environmental behavior of CDs, the stability of CDs in aqueous solutions were first examined by different environmental conditions, followed by the systematic investigation of the adsorption behaviors of CDs onto Al2O3 surface. Electrostatic interactions were considered as the dominant forces in CDs adsorption onto Al2O3 process, which were further confirmed by controlling experiments as compared with other minerals or oxides, such as montmorillonite, kaolinite and SiO2...
April 25, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28453987/calcium-rich-biochar-from-the-pyrolysis-of-crab-shell-for-phosphorus-removal
#10
Lichun Dai, Furong Tan, Hong Li, Nengmin Zhu, Mingxiong He, Qili Zhu, Guoquan Hu, Li Wang, Jie Zhao
Calcium-rich biochars (CRB) prepared through pyrolysis of crab shell at various temperatures were characterized for physicochemical properties and P removal potential. Elemental analysis showed that CRB was rich in calcium (22.91%-36.14%), while poor in carbon (25.21%-9.08%). FTIR, XRD and TG analyses showed that calcite-based CRB was prepared at temperature ≤600 °C, while lime-based CRB was prepared at temperature ≥700 °C. Phosphorus removal experiment showed that P removal efficiencies in 80 mg P/L phosphate solution and biogas effluent ranged from 26% to 11%, respectively, to about 100% and 63%, respectively, depending on the pyrolysis temperature of the resulting biochar...
April 25, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28453926/fluoropolymer-stabilized-chromophore-catalyst-assemblies-in-aqueous-buffer-solutions-for-water-oxidation-catalysis
#11
Michael S Eberhart, Kyung-Ryang Wee, Degao Wang, Seth Marquard, Kasey Skinner, Animesh Nayak, Thomas J Meyer
We describe here application of the fluorinated polymer (Dupont AF, a copolymer of 4,5-difluoro-2,2-bis(trifluoromethyl)-1,3-dioxole and tetrafluoroethylene) in stabilizing phosphonate-derivatized molecular assemblies on oxide electrodes. In the procedure, the polymer is dip coated onto the surfaces of oxide electrodes with pre-bound, phosphonate-derivatized chromophores and assemblies including assemblies for water oxidation. The results of our experiments demonstrate a high degree of stabilization by the added polymer and a demonstration of its use in stabilizing surface-bound assemblies for water oxidation catalysis...
April 28, 2017: ChemSusChem
https://www.readbyqxmd.com/read/28453901/quasi-static-acoustic-tweezing-thromboelastometry
#12
R G Holt, D Luo, N Gruver, D B Khismatullin
BACKGROUND: Thromboelastography is widely used as a tool to assess the coagulation status of surgical patients. It allows observation of changes in material properties of whole blood, beginning with early stages of clot formation and ending with clot lysis. However, the contact activation of the coagulation cascade at surfaces of thromboelastographic systems leads to inherent variability and unreliability in predicting bleeding or thrombosis risks. OBJECTIVES: To develop acoustic tweezing thromboelastometry as a noncontact method for perioperative assessment of blood coagulation...
April 28, 2017: Journal of Thrombosis and Haemostasis: JTH
https://www.readbyqxmd.com/read/28453900/the-kinetics-of-growth-of-metallo-supramolecular-polyelectrolytes-in-solution
#13
Stefanie Martina Munzert, Simon P Stier, Guntram Schwarz, Haim Weissman, Boris Rybtchinski, Dirk G Kurth
Several transition metal ions, like Fe2+, Co2+, Ni2+, and Zn2+ complex to the ditopic ligand 1,4-bis(2,2':6',2''-terpyridin-4'-yl)benzene (L). Due to the high association constant, metal ion induced self-assembly of Fe2+, Co2+, and Ni2+ leads to extended, rigid-rod like metallo-supramolecular coordination polyelectrolytes (MEPEs) even in aqueous solution. Here, we present the kinetics of growth of MEPEs. The species in solutions are analyzed by light scattering, viscometry and Cryogenic Transmission Electron microscopy (cryo-TEM)...
April 28, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28453894/efficacy-and-safety-of-oral-propranolol-for-infantile-hemangioma-in-japan
#14
Tsuyoshi Kaneko, Satoru Sasaki, Naoko Baba, Katsuyoshi Koh, Kiyoshi Matsui, Hiroyuki Ohjimi, Nobukazu Hayashi, Atsuko Nakano, Kentaro Ohki, Yoshihiro Kuwano, Akira Morimoto, Zenshiro Tamaki, Mariko Kakazu, Kazuo Kishi, Tomoki Oyama, Atsushi Sato, Rumiko Kato, Takeshi Higuchi
BACKGROUND: There have been few reports on the efficacy and safety of oral administration of propranolol at 3 mg/kg/day in Japanese infantile hemangioma (IH) patients. METHODS: A multicenter, open-label phase III study was conducted to evaluate the efficacy and safety of oral propranolol solution in Japanese infants aged 35 to 150 days with proliferating IH. Thirty-two patients were enrolled in the study, received propranolol solution for 24 weeks at 3 mg/kg/day, and completed the study...
April 28, 2017: Pediatrics International: Official Journal of the Japan Pediatric Society
https://www.readbyqxmd.com/read/28453873/induced-orientation-of-nitrogen-monoxide-and-azide-ion-vibrations-in-human-hemoglobin-in-bidistilled-water-solution-under-a-static-magnetic-field
#15
Emanuele Calabrò, Salvatore Magazù
In this study, we report the effects of static magnetic fields (SMFs) at 200 mT on different hemoglobin aqueous solutions, in the absence and in the presence of sucrose and trehalose, studied by FTIR spectroscopic techniques. Significant decrease in intensity of Amide I and Amide II vibration bands was observed after 6 h exposure for hemoglobin in bidistilled water solution. Also, it was observed that the decrease in intensity of the Amide I band was larger than the Amide II after exposure. This result can be explained assuming that an SMF induces increase of hydrogen bonding in hemoglobin in bidistilled water solution...
April 28, 2017: Bioelectromagnetics
https://www.readbyqxmd.com/read/28453855/newly-characterized-interaction-stabilizes-dna-structure-oligoethylene-glycols-stabilize-g-quadruplexes-ch-%C3%AF-interactions
#16
Hisae Tateishi-Karimata, Tatsuya Ohyama, Takahiro Muraoka, Peter Podbevsek, Adam M Wawro, Shigenori Tanaka, Shu-Ichi Nakano, Kazushi Kinbara, Janez Plavec, Naoki Sugimoto
Oligoethylene glycols are used as crowding agents in experiments that aim to understand the effects of intracellular environments on DNAs. Moreover, DNAs with covalently attached oligoethylene glycols are used as cargo carriers for drug delivery systems. To investigate how oligoethylene glycols interact with DNAs, we incorporated deoxythymidine modified with oligoethylene glycols of different lengths, such as tetraethylene glycol (TEG), into DNAs that form antiparallel G-quadruplex or hairpin structures such that the modified residues were incorporated into loop regions...
April 27, 2017: Nucleic Acids Research
https://www.readbyqxmd.com/read/28453854/the-dynamics-of-the-monomeric-restriction-endonuclease-bcni-during-its-interaction-with-dna
#17
Georgij Kostiuk, Jasmina Dikic, Friedrich W Schwarz, Giedrius Sasnauskas, Ralf Seidel, Virginijus Siksnys
Endonucleases that generate DNA double strand breaks often employ two independent subunits such that the active site from each subunit cuts either DNA strand. Restriction enzyme BcnI is a remarkable exception. It binds to the 5΄-CC/SGG-3΄ (where S = C or G, '/' designates the cleavage position) target as a monomer forming an asymmetric complex, where a single catalytic center approaches the scissile phosphodiester bond in one of DNA strands. Bulk kinetic measurements have previously shown that the same BcnI molecule cuts both DNA strands at the target site without dissociation from the DNA...
April 27, 2017: Nucleic Acids Research
https://www.readbyqxmd.com/read/28453851/eradication-of-staphylococcus-aureus-biofilm-infections-using-synthetic-antimicrobial-peptides
#18
Marta Zapotoczna, Éanna Forde, Siobhan Hogan, Hilary Humphreys, James P O'Gara, Deirdre Fitzgerald-Hughes, Marc Devocelle, Eoghan O'Neill
Here, we demonstrate that antimicrobial peptides (AMPs) are an effective antibiofilm treatment when applied as catheter lock solutions (CLSs) against S. aureus biofilm infections. The activity of synthetic AMPs (Bac8c, HB43, P18, Omiganan, WMR, Ranalexin, and Polyphemusin) was measured against early and mature biofilms produced by methicillin-resistant S. aureus and methicillin-susceptible S. aureus isolates from patients with device-related infections grown under in vivo-relevant biofilm conditions. The cytotoxic and hemolytic activities of the AMPs against human cells and their immunomodulatory potential in human blood were also characterized...
March 15, 2017: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/28453790/does-the-law-on-compensation-for-research-related-injury-in-the-uk-australia-and-new-zealand-meet-ethical-requirements
#19
Joanna M Manning
Despite a consensus that society owes an ethical obligation to compensate for research-related injury, and that no-fault is the best ethical response, an assessment of the compensation arrangements in place in the UK, Australia and New Zealand shows that in general compensation arrangements fall below this ethical expectation. Most subjects rely on ex gratia payment or an unenforceable assurance of payment in the event of injury. It is also likely that, given significant deficiencies in participant information about compensation arrangements in place for trials recommended by the supervisory ethics agencies in each jurisdiction, subjects only find out about their financial exposure in the event of injury...
April 26, 2017: Medical Law Review
https://www.readbyqxmd.com/read/28453714/evaluating-the-effect-of-integrated-microfinance-and-health-interventions-an-updated-review-of-the-evidence
#20
Lara M J Lorenzetti, Sheila Leatherman, Valerie L Flax
Background: Solutions delivered within firm sectoral boundaries are inadequate in achieving income security and better health for poor populations. Integrated microfinance and health interventions leverage networks of women to promote financial inclusion, build livelihoods, and safeguard against high cost illnesses. Our understanding of the effect of integrated interventions has been limited by variability in intervention, outcome, design, and methodological rigour. This systematic review synthesises the literature through 2015 to understand the effect of integrated microfinance and health programs...
June 1, 2017: Health Policy and Planning
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