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https://www.readbyqxmd.com/read/28432633/synthesis-spectral-properties-and-dft-calculations-of-new-ruthenium-ii-polypyridyl-complexes-dna-binding-affinity-and-in-vitro-cytotoxicity-activity
#1
Rajender Reddy Mallepally, Nagamani Chintakuntla, Venkat Reddy Putta, Nagasuryaprasad K, Ravi Kumar Vuradi, Madhuri P, Satyanarayana Singh S, Ramesh Kumar Chitumalla, Joonkyung Jang, Nagababu Penumaka, Satyanarayana Sirasani
In this paper a novel ligand debip (2-(4-N,N-diethylbenzenamine)1H-imidazo[4,5-f] [1, 10]phenanthroline) and its Ru(II) polypyridyl complexes [Ru(L)2(debip)](2+), (L = phen (1), bpy (2) and dmb (3)) have been synthesized and characterized by spectroscopic techniques. The DNA binding studies for all these complexes were examined by absorption, emission, quenching studies, viscosity measurements and cyclic voltammetry. The light switching properties of complexes 1-3 have been evaluated. Molecular docking, Density Functional Theory (DFT) and time dependent DFT calculations were performed...
April 22, 2017: Journal of Fluorescence
https://www.readbyqxmd.com/read/28418159/toxicity-of-sediment-associated-substituted-phenylamine-antioxidants-on-the-early-life-stages-of-pimephales-promelas-and-a-characterization-of-effects-on-freshwater-organisms
#2
Ryan S Prosser, Joanne L Parrott, Melissa Galicia, Kallie Shires, Cheryl Sullivan, John Toito, Adrienne J Bartlett, Danielle Milani, Patty L Gillis, Vimal K Balakrishnan
Substituted phenylamine antioxidants (SPAs) are high production volume chemicals that are incorporated into a variety of commercial products (e.g., polymers, dyes, lubricants). There are little data on chronic toxicity of SPAs to fish and no data on the toxicity of SPAs to the early-life stages of fish. The physicochemical properties of SPAs would suggest that if they were to enter an aquatic ecosystem they would partition into sediment. Therefore, the current study focused on investigating the chronic effect of sediment-associated SPAs to the early-life stages of the fathead minnow (Pimephales promelas)...
April 18, 2017: Environmental Toxicology and Chemistry
https://www.readbyqxmd.com/read/28405659/recyclable-au-tio2-nanocomposite-sers-active-substrates-contributed-by-synergistic-charge-transfer-effect
#3
Xin Jiang, Xiaodong Sun, Di Yin, Xiuling Li, Ming Yang, Xiaoxia Han, Libin Yang, Bing Zhao
In this study, Au deposited TiO2 (Au-TiO2) nanocomposites were prepared by photocatalytic reduction of Au species (HAuCl4) on TiO2 nanoparticles (NPs) and served as efficient SERS-active substrates. The observed considerable SERS enhancement of 4-MBA molecules on Au-TiO2 NPs compared with that on pure TiO2 NPs can be attributed to the synergistic contribution of semiconductors and metals by the charge-transfer mechanism from the substrate to the molecule. In the preparation of Au-TiO2 nanocomposites, the photo-reduction time and concentration of HAuCl4 have an important influence on the SERS enhancement effect of the composite substrate...
April 13, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28404832/folate-deficiency-is-prevalent-in-women-of-childbearing-age-in-belize-and-is-negatively-affected-by-coexisting-vitamin-b-12-deficiency-belize-national-micronutrient-survey-2011
#4
Jorge Rosenthal, Natalia Largaespada, Lynn B Bailey, Michael Cannon, C J Alverson, Dayrin Ortiz, Gail Pa Kauwell, Joe Sniezek, Ramon Figueroa, Robyn Daly, Peter Allen
Background: Folate deficiency, vitamin B-12 deficiency, and anemia can have adverse effects on birth outcomes. Also, low vitamin B-12 reduces the formation of metabolically active folate.Objectives: We sought to establish the baseline prevalence of and factors associated with folate deficiency and insufficiency, vitamin B-12 deficiency, and anemia among women of childbearing age (WCBA) in Belize.Methods: In 2011, a national probability-based survey was completed among Belizean nonpregnant WCBA aged 15-49 y...
April 12, 2017: Journal of Nutrition
https://www.readbyqxmd.com/read/28403640/a-kaempferol-triglycoside-from-tephrosia-preussii-taub-fabaceae
#5
Yves Martial Mba Nguekeu, Maurice Ducret Awouafack, Pierre Tane, Marius Roch Nguedia Lando, Takeshi Kodama, Hiroyuki Morita
A phytochemical investigation of the MeOH extract of twigs and leaves of Tephrosia preussi was carried out to give a new kaempferol triglycoside, named tephrokaempferoside (1), together with five known compounds: tephrosin (2), betulinic acid (3), lupeol (4), β-sitosterol (5) and 3-O-β-d-glucopyranoside of β-sitosterol (6). The structure of the new compound was characterised by analyses of NMR (1D and 2D) and MS data, and chemical conversion. Tephrokaempferoside (1) had weak antibacterial activity against Klebsiella pneumoniae with an MIC value of 150 μg/mL...
April 13, 2017: Natural Product Research
https://www.readbyqxmd.com/read/28365452/gd2o3-doped-silica-au-nanoparticles-for-in-vitro-imaging-cancer-biomarkers-using-surface-enhanced-raman-scattering
#6
Lifu Xiao, Xiumei Tian, Sitaram Harihar, Qifei Li, Li Li, Danny R Welch, Anhong Zhou
There has been an interest in developing multimodal approaches to combine the advantages of individual imaging modalities, as well as to compensate for respective weaknesses. We previously reported a composite nano-system composed of gadolinium-doped mesoporous silica nanoparticle and gold nanoparticle (Gd-Au NPs) as an efficient MRI contrast agent for in vivo cancer imaging. However, MRI lacks sensitivity and is unsuitable for in vitro cancer detection. Thus, here we performed a study to use the Gd-Au NPs for detection and imaging of a widely recognized human cancer biomarker, epidermal growth factor receptor (EGFR), in individual human cancer cells with surface-enhanced Raman scattering (SERS)...
March 22, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/28358527/-going-out-of-the-box-close-intercultural-friendships-and-romantic-relationships-spark-creativity-workplace-innovation-and-entrepreneurship
#7
Jackson G Lu, Andrew C Hafenbrack, Paul W Eastwick, Dan J Wang, William W Maddux, Adam D Galinsky
The present research investigates whether close intercultural relationships promote creativity, workplace innovation, and entrepreneurship-outcomes vital to individual and organizational success. We triangulate on these questions with multiple methods (longitudinal, experimental, and field studies), diverse population samples (MBA students, employees, and professional repatriates), and both laboratory and real-world measures. Using a longitudinal design over a 10-month MBA program, Study 1 found that intercultural dating predicted improved creative performance on both divergent and convergent thinking tasks...
March 30, 2017: Journal of Applied Psychology
https://www.readbyqxmd.com/read/28347923/biocompatible-3d-sers-substrate-for-trace-detection-of-amino-acids-and-melamine
#8
Elumalai Satheeshkumar, Palaniyandi Karuppaiya, Kundan Sivashanmugan, Wei-Ting Chao, Hsin-Sheng Tsay, Masahiro Yoshimura
A novel, low-cost and biocompatible three-dimensional (3D) substrate for surface-enhanced Raman spectroscopy (SERS) is fabricated using gold nanoparticles (AuNPs) loaded on cellulose paper for detection of amino acids and melamine. Dysosma pleiantha rhizome (Dp-Rhi) capped AuNPs (Dp-Rhi_AuNPs) were prepared by in situ using aqueous extract of Dp-Rhi and in situ functionalized Dp-Rhi on AuNPs surface was verified by Fourier transform infrared spectroscopy and zeta potentials analysis shows a negative (-18.4mV) surface charges, which confirm that presence of Dp-Rhi on AuNPs...
March 21, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/28344094/controlled-release-of-antibiotic-amoxicillin-drug-using-carboxymethyl-cellulose-cl-poly-lactic-acid-co-itaconic-acid-hydrogel
#9
S Sood, Vinod Kumar Gupta, Shilpi Agarwal, Kamal Dev, Deepak Pathania
In this paper, microwave assisted preparation of carboxymethyl cellulose-cl-poly(lactic acid-co-itaconic acid) (CMC-cl-P(LA-co-IA)) hydrogel was reported via facile graft copolymerization using N,N(1)-methylene-bis-acrylamide (MBA) and potassium persulphate as cross linker and initiator. Different reaction parameters were optimized to achieve good yield. The formation of hydrogel was confirmed by characterization techniques such as Fourier transform infrared spectroscopy, field emission scanning electron microscopy, X-ray diffraction, thermo gravimetric analysis, transmission electron microscopy etc...
March 23, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28335304/silver-nanoparticle-embedded-thin-silica-coated-graphene-oxide-as-an-sers-substrate
#10
Xuan-Hung Pham, Eunil Hahm, Hyung-Mo Kim, Seongbo Shim, Tae Han Kim, Dae Hong Jeong, Yoon-Sik Lee, Bong-Hyun Jun
A hybrid of Ag nanoparticle (NP)-embedded thin silica-coated graphene oxide (GO@SiO₂@Ag NPs) was prepared as a surface-enhanced Raman scattering (SERS) substrate. A 6 nm layer of silica was successfully coated on the surface of GO by the physical adsorption of sodium silicate, followed by the hydrolysis of 3-mercaptopropyl trimethoxysilane. Ag NPs were introduced onto the thin silica-coated graphene oxide by the reduction of Ag⁺ to prepare GO@SiO₂@Ag NPs. The GO@SiO₂@Ag NPs exhibited a 1.8-fold enhanced Raman signal compared to GO without a silica coating...
September 22, 2016: Nanomaterials
https://www.readbyqxmd.com/read/28330475/in-memorian-thomas-w-hesterberg-phd-mba-1950-2016
#11
David B Warheit
No abstract text is available yet for this article.
March 22, 2017: Particle and Fibre Toxicology
https://www.readbyqxmd.com/read/28326965/hematogones-detected-by-flow-cytometry-in-a-child-with-vitamin-b12-deficiency
#12
Lisa Sutton, Nkechi Mba
Vitamin B12 deficiency is a known cause of megaloblastic anemia and bone marrow failure. Bone marrow biopsies are not frequently performed as part of the diagnostic workup and can demonstrate morphologic features that overlap with myelodysplastic syndrome (MDS) and acute leukemia. We describe a case of a dysplastic bone marrow with increased bone marrow hematogones detected by flow cytometry in a child with vitamin B12 deficiency. Hematogones are normal B cell precursors, and hyperplasia has been described in a variety of often reactive conditions and also disease...
March 2017: Pediatric and Developmental Pathology
https://www.readbyqxmd.com/read/28324718/l-arginine-assisted-one-pot-synthesis-of-hierarchical-ag1pt2-nanocorallines-for-surface-enhanced-raman-spectroscopy
#13
Liu-Ying Jiang, Xin-Sheng Li, Ai-Jun Wang, Hong Huang, Jiu-Ju Feng
The hierarchical multi-branched Ag1Pt2 nanocorallines (NCs) were prepared in a large scale by a rapid aqueous method, using l-arginine as the eco-friendly shape-directing agent. The product was mainly characterized by microscopy measurements, X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). The architectures exhibited superior surface-enhanced Raman scattering (SERS) with 4-nitrothiophenol (4-NTP), the enhancement factor (EF) of 1.3×10(5), a wide linear range of 10-100μM and a low detection limit of 0...
March 6, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28322540/rapid-recovery-double-cross-linking-hydrogel-with-stable-mechanical-properties-and-high-resilience-triggered-by-visible-light
#14
Longxiang Zhu, Jianhui Qiu, Eiichi Sakai, Kazushi Ito
The designed tough hydrogels, depending on energy dissipation mechanism, possess excellent biocompatibility, stimuli-responsiveness, and outstanding mechanical properties. However, the application of hydrogels is greatly limited in actuators and sensors for the lack of instantaneous recovery and resilience. In this work, we synthesized a double cross-linking poly(acrylic acid) hydrogel via a simple, one-pot, visible-light-trigger polymerization, with carboxymethyl cellulose as initiator and the first cross-linker, N,N'-methylene bis(acrylamide) (MBA) as the second cross-linker...
April 5, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28282915/implementing-the-bruker-maldi-biotyper-in-the-public-health-laboratory-for-c-botulinum-neurotoxin-detection
#15
Michael J Perry, Dominick A Centurioni, Stephen W Davis, George E Hannett, Kimberlee A Musser, Christina T Egan
Currently, the gold standard method for active botulinum neurotoxin (BoNT) detection is the mouse bioassay (MBA). A Centers for Disease Control and Prevention-developed mass spectrometry (MS)-based assay that detects active BoNT was successfully validated and implemented in a public health laboratory in clinical matrices using the Bruker MALDI-TOF MS (Matrix-assisted laser desorption ionization-time of flight mass spectrometry) Biotyper. For the first time, a direct comparison with the MBA was performed to determine MS-based assay sensitivity using the Bruker MALDI Biotyper...
March 9, 2017: Toxins
https://www.readbyqxmd.com/read/28274462/extraction-of-melamine-from-milk-using-a-magnetic-molecularly-imprinted-polymer
#16
T S Anirudhan, J Christa, J R Deepa
A novel magnetic molecularly imprinted polymer (MMIP) for the preconcentration of melamine, a non-protein nitrogen food additive from complex matrices was synthesized and characterized using FT-IR, XRD, SEM and VSM techniques. Surface imprinting was done on vinyltrimethoxysilane coated Fe3O4 (Fe3O4-VTMS) using 2-acrylamido-2-methylpropane sulfonic acid (AMPS), N,N'-methylenebisacrylamide (MBA) and potassium persulfate (KPS) as functional monomer, crosslinker and initiator respectively. Saturation magnetization value obtained for MMIP was 1...
July 15, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28267605/chairmen-in-academic-urologic-practice-a-descriptive-analysis
#17
Nicholas J Farber, Brian J Friel, Young S Kwon, Andrew Cruz, Sammy E Elsamra
OBJECTIVE: To examine and characterize the demographics and scholarly characteristics of academic urology chairmen at the time of appointment. MATERIALS AND METHODS: The chairman of each United States urology residency program as of September 2016 was included in the study. Interim chairmen, as well as programs for which no clearly defined chair could be identified, were excluded. Demographic and academic data were collected via publically available curriculum vitae, departmental websites, Google search engine, and PubMed and Scopus websites...
March 4, 2017: Urology
https://www.readbyqxmd.com/read/28257022/supramolecular-hydrogen-bonding-patterns-in-1-1-cocrystals-of-5-fluorouracil-with-4-methylbenzoic-acid-and-3-nitrobenzoic-acid
#18
Marimuthu Mohana, Packianathan Thomas Muthiah, Colin D McMillen
The design of a pharmaceutical cocrystal is based on the identification of specific hydrogen-bond donor and acceptor groups in active pharmaceutical ingredients (APIs) in order to choose a `complementary interacting' molecule that can act as an efficient coformer. 5-Fluorouracil (5FU) is a pyrimidine derivative with two N-H donors and C=O acceptors and shows a diversity of hydrogen-bonding motifs. Two 1:1 cocrystals of 5-fluorouracil (5FU), namely 5-fluorouracil-4-methylbenzoic acid (5FU-MBA), C4H3FN2O2·C8H8O2, (I), and 5-fluorouracil-3-nitrobenzoic acid (5FU-NBA), C4H3FN2O2·C7H5NO4, (II), have been prepared and characterized by single-crystal X-ray diffraction...
March 1, 2017: Acta Crystallographica. Section C, Structural Chemistry
https://www.readbyqxmd.com/read/28255832/analysing-algorithms-and-data-sources-for-the-tissue-specific-reconstruction-of-liver-healthy-and-cancer-cells
#19
Jorge Ferreira, Sara Correia, Miguel Rocha
Genome-Scale Metabolic Models (GSMMs), mathematical representations of the cell metabolism in different organisms including humans, are resourceful tools to simulate metabolic phenotypes and understand associated diseases, such as obesity, diabetes and cancer. In the last years, different algorithms have been developed to generate tissue-specific metabolic models that simulate different phenotypes for distinct cell types. Hepatocyte cells are one of the main sites of metabolic conversions, mainly due to their diverse physiological functions...
March 2017: Interdisciplinary Sciences, Computational Life Sciences
https://www.readbyqxmd.com/read/28255568/association-between-lateral-posterior-tibial-slope-body-mass-index-and-acl-injury-risk
#20
Katherine M Bojicic, Mélanie L Beaulieu, Daniel Y Imaizumi Krieger, James A Ashton-Miller, Edward M Wojtys
BACKGROUND: While body mass index (BMI), a modifiable parameter, and knee morphology, a nonmodifiable parameter, have been identified as risk factors for anterior cruciate ligament (ACL) rupture, the interaction between them remains unknown. An understanding of this interaction is important because greater compressive axial force (perhaps due to greater BMI) applied to a knee that is already at an increased risk because of its geometry, such as a steep lateral posterior tibial slope, could further increase the probability of ACL injury...
February 2017: Orthopaedic Journal of Sports Medicine
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