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https://www.readbyqxmd.com/read/28645035/ctab-induced-hierarchical-bismuth-microspheres-for-visible-light-photocatalytic-study
#1
Fengnan Zhang, Yan Zhao, Yawen Li, Gongjuan Wu, Jingzhe Zhao
Nanosheet constructed bismuth microspheres were prepared through an aqueous reduction approach in the presence of CTAB molecules, with initial formed BiOCl as the precursor and hydrazine hydrate as the reductant. The flower-like morphology and platelet units of BiOCl precursor determined the evolution of hierarchical Bi microspheres through a morphology-heredity process. Trisodium citrate was introduced to keep the Bi microspheres from oxidation, the high purity in composition are beneficial to eliminate the influence of bismuth oxides...
June 13, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28551574/toxicity-of-silver-nanoparticles-towards-tumoral-human-cell-lines-u-937-and-hl-60
#2
Anna Barbasz, Magdalena Oćwieja, Maciej Roman
The toxicity of three types of silver nanoparticles towards histiocytic lymphoma (U-937) and human promyelocytic cells (HL-60) was studied. The nanoparticles were synthesized in a chemical reduction method using sodium borohydride. Trisodium citrate and cysteamine hydrochloride were used to generate a negative and positive nanoparticle surface charge. The evaluation of cell viability, membrane integrity, antioxidant activity and the induction of inflammation were used to evaluate the difference in cellular response to the nanoparticle treatment...
May 11, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/28530091/3d-bioprinting-of-highly-thixotropic-alginate-methylcellulose-hydrogel-with-strong-interface-bonding
#3
Huijun Li, Yu Jun Tan, Kah Fai Leong, Lin Li
A robust alginate/methylcellulose (Alg/MC) blend hydrogel, with a strategy to improve adhesion between printed layers, has been fabricated for the first time for three-dimensional (3D) bioprinting. The optimized Alg/MC blend hydrogel exhibits a highly thixotropic property, great extrudability, and stackability. With treatment by a trisodium citrate (TSC) solution, the interfacial bonding between the printed layers is significantly improved. The TSC solution acts as a chelating agent to remove the superficial calcium ions at each layer...
June 5, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28482523/switchable-on-off-drug-release-from-gold-nanoparticles-grafted-dual-light-and-temperature-responsive-hydrogel-for-controlled-drug-delivery
#4
Mitra Amoli-Diva, Rasoul Sadighi-Bonabi, Kamyar Pourghazi
A switchable dual light- and temperature-responsive drug carrier using gold nanoparticles (Au NPs)-grafted poly(dimethylacrylamide-co-acrylamide)/poly acrylic acid [P(DMA-co-AAm)/PAAc] hydrogel was prepared by free radical polymerization procedure using N,N-methylenebisacrylamide as cross-linker and ammonium persulfate as initiator. Initial P(DMA-co-AAm) hydrogel and uniformly-distributed stable Au NPs, prepared by reduction of hydrogen tetrachloroaureate (III) hydrate in the presence of trisodium citrate, were synthesized separately...
July 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28476318/determination-of-glyphosate-in-soil-sludge-by-high-performance-liquid-chromatography
#5
Lisi Sun, Deyang Kong, Weidong Gu, Xinyan Guo, Wenqi Tao, Zhengjun Shan, Ying Wang, Na Wang
In order to evaluate the pollution caused due to glyphosate (Glyp) in soils and sludge, it is important to establish a set of standard determination techniques. In this work, the previously reported HPLC analytical method for determination of Glyp has been improved in order to be applied for all kinds of soils/sludge. The soil/sludge samples were extracted using sodium phosphate and trisodium citrate aqueous solutions. The extract was adjusted to pH 9 and contaminations were removed by washing with n-hexane...
June 16, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28460615/formulation-characterization-and-in-vitro-evaluation-of-fast-dissolving-tablets-containing-gliclazide-hydrotropic-solid-dispersions
#6
Jyotsana R Madan, Virendra J Kamate, Rajendra Awasthi, Kamal Dua
BACKGROUND: Low aqueous solubility is a major problem faced with new drug molecules. The purpose of this research was to provide a fast dissolving oral dosage form of gliclazide (GLZ) using the concept of mixed hydrotropy. METHODS: Solubility of GLZ was determined individually in sodium salicylate, nicotinamide, lactose, sodium acetate, urea, trisodium citrate and sodium benzoate. Highest solubility was obtained in 40% sodium benzoate solution. In order to decrease the individual hydrotrope amount, mixed hydrotropic agents were used...
April 26, 2017: Recent Patents on Drug Delivery & Formulation
https://www.readbyqxmd.com/read/28433942/synthesis-and-characterization-of-poly-propylene-imine-dendrimer-grafted-gold-nanoparticles-as-nanocarriers-of-doxorubicin
#7
Marzieh Golshan, Mehdi Salami-Kalajahi, Mina Mirshekarpour, Hossein Roghani-Mamaqani, Maryam Mohammadi
The aim of current work is synthesis 4th-generation-poly(propylene imine) (PPI)-dendrimer modified gold nanoparticles (Au-G4A) as nanocarriers for doxorubicin (DOX) and studying in vitro drug release kinetics from nanocarriers into different media. Accordingly, AuNPs were synthesized by reduction of chloroauric acid (HAuCl4) aqueous solution with trisodium citrate and modified with cysteamine to obtain amine-functionalized (Au-NH2) nanoparticles. Au-NH2 nanoparticles were used as multifunctional cores and participated in Michael addition of acrylonitrile and reduction process by lithium aluminum hydride (LAH) to synthesize Au-G4A nanoparticles...
April 13, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/28362683/thrombin-generation-profiles-as-predictors-of-symptomatic-venous-thromboembolism-after-trauma-a-prospective-cohort-study
#8
Myung S Park, Grant M Spears, Kent R Bailey, Ailing Xue, Michael J Ferrara, Amy Headlee, Sabtir K Dhillon, Donald H Jenkins, Scott P Zietlow, William S Harmsen, Aneel A Ashrani, John A Heit
BACKGROUND: Reliable biomarkers predictive of venous thromboembolism (VTE) after acute trauma are uncertain. The objective of the study was to identify risk factors for symptomatic VTE after trauma, including individual plasma coagulome characteristics as reflected by thrombin generation. METHODS: In a prospective, case-cohort study, trauma patients were enrolled over the 4.5 year period, 2011-2015. Blood was collected by venipuncture into 3.2% trisodium citrate at 0, 6, 12, 24 and 72 hours after injury, and at hospital discharge...
March 30, 2017: Journal of Trauma and Acute Care Surgery
https://www.readbyqxmd.com/read/28329722/antibacterial-properties-of-amino-acid-functionalized-silver-nanoparticles-decorated-on-graphene-oxide-sheets
#9
Kumudini Chandraker, Rekha Nagwanshi, S K Jadhav, Kallol K Ghosh, Manmohan L Satnami
Graphene oxide (GO) sheets decorated with amino acid L-cysteine (L-cys) functionalized silver nanoparticles (GO-L-cys-Ag) was synthesized by AgNO3, trisodium citrate, and NaBH4. GO-L-cys-Ag nanocomposite was characterized by transmission electron microscopy (TEM), Fourier transform infrared (FTIR) spectra, ultraviolet-visible (UV-vis) absorption spectra, which demonstrated that a diameter of L-cys-AgNPs compactly deposited on GO. Antibacterial activity tests of GO-L-cys-Ag nanocomposite were carried out using Escherichia coli MTCC 1687 and Staphylococcus aureus MTCC 3160 as model strains of Gram-negative and Gram-positive bacteria, respectively...
March 16, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/28298697/influence-of-using-a-blend-of-rennet-casein-and-whey-protein-concentrate-as-protein-source-on-the-quality-of-mozzarella-cheese-analogue
#10
Padhiyar Dhanraj, Atanu Jana, Hiral Modha, K D Aparnathi
The effect of incorporating whey protein concentrate (WPC) on the quality characteristics of Mozzarella cheese analogue (MCA) based on rennet casein (RC) was studied. The proportion of RC:WPC tried out were 95:5, 90:10, and 85:15 w/w. The formulation of MCA comprised of 23.5% of blend of RC and WPC, 15% specialty vegetable fat, 2.75% trisodium citrate + disodium hydrogen orthophosphate (2.5:1, w/w), 0.07% calcium chloride, 0.6% citric acid, 1.1% NaCl, 1.5% cheese bud flavoring, and rest water. Varying the proportion of RC and WPC had a significant influence on the composition, textural properties, baking qualities and sensory quality of MCA judged as a topping on pizza pie...
March 2017: Journal of Food Science and Technology
https://www.readbyqxmd.com/read/28295909/optical-and-magnetic-properties-of-fe-nanoparticles-fabricated-by-femtosecond-laser-ablation-in-organic-and-inorganic-solvents
#11
Jesica M J Santillán, David Muñetón Arboleda, Diego F Coral, Marcela B Fernández van Raap, Diego Muraca, Daniel C Schinca, Lucía B Scaffardi
Magnetic nanoparticles have attracted much interest due to their broad applications in biomedicine and pollutant remediation. In this work, the optical, magnetic, and structural characteristics of colloids produced by ultrashort pulsed laser ablation of a solid Fe target were studied in four different media: HPLC water, an aqueous solution of trisodium citrate, acetone, and ethanol. Optical extinction spectroscopy revealed an absorption band in the UV region for all, in contrast to the results obtained with nanosecond lasers...
May 5, 2017: Chemphyschem: a European Journal of Chemical Physics and Physical Chemistry
https://www.readbyqxmd.com/read/28207245/regenerable-polyelectrolyte-membrane-for-ultimate-fouling-control-in-forward-osmosis
#12
Yan Kang, Sunxiang Zheng, Casey Finnerty, Michael J Lee, Baoxia Mi
This study demonstrated the feasibility of using regenerable polyelectrolyte membranes to ultimately control the irreversible membrane fouling in a forward osmosis (FO) process. The regenerable membrane was fabricated by assembling multiple polyethylenimine (PEI) and poly(acrylic acid) (PAA) bilayers on a polydopamine-functionalized polysulfone support. The resulting membrane exhibited higher water flux and lower solute flux in FO mode (with the active layer facing feed solution) than in PRO mode (with the active layer facing draw solution) using trisodium citrate as draw solute, most likely due to the unique swelling behavior of the polyelectrolyte membrane...
March 21, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28178965/effect-of-glucose-on-poly-%C3%AE-glutamic-acid-metabolism-in-bacillus-licheniformis
#13
Wencheng Yu, Zhen Chen, Hong Ye, Peize Liu, Zhipeng Li, Yuanpeng Wang, Qingbiao Li, Shan Yan, Chuan-Jian Zhong, Ning He
BACKGROUND: Poly-gamma-glutamic acid (γ-PGA) is a promising macromolecule with potential as a replacement for chemosynthetic polymers. γ-PGA can be produced by many microorganisms, including Bacillus species. Bacillus licheniformis CGMCC2876 secretes γ-PGA when using glycerol and trisodium citrate as its optimal carbon sources and secretes polysaccharides when using glucose as the sole carbon source. To better understand the metabolic mechanism underlying the secretion of polymeric substances, SWATH was applied to investigate the effect of glucose on the production of polysaccharides and γ-PGA at the proteome level...
February 8, 2017: Microbial Cell Factories
https://www.readbyqxmd.com/read/28150833/kinetically-controlled-synthesis-of-nanoporous-au-and-its-enhanced-electrocatalytic-activity-for-glucose-based-biofuel-cells
#14
Man Xu, Yongming Sui, Guanjun Xiao, Xinyi Yang, Yingjin Wei, Bo Zou
Nanoporous gold (NPG) structures, which possess abundant high-index facets, kinks, and steps, have been demonstrated as effective catalysts for the glucose electrooxidation in biofuel cells. Herein, we designed surface-clean NPG structures with high-index facets by a trisodium citrate (Na3Cit) self-initiated reduction of chloroauric acid (HAuCl4) in a water-ice bath followed by a kinetically controlled self-assembly manner. This strategy breaks through the traditional trisodium citrate thermal-reducing chloroauric acid approach where solutions are required to heat to a certain temperature for the reaction to initiate...
February 2, 2017: Nanoscale
https://www.readbyqxmd.com/read/28110053/development-and-optimization-of-an-in%C3%A2-vitro-cultivation-protocol-allows-for-isolation-of-borrelia-miyamotoi-from-patients-with-hard-tick-borne-relapsing-fever
#15
J Koetsveld, N M Kolyasnikova, A Wagemakers, M G Toporkova, D S Sarksyan, A Oei, A E Platonov, J W Hovius
OBJECTIVES: Borrelia miyamotoi has been shown to infect humans in Eurasia and North America causing hard tick-borne relapsing fever (HTBRF). In vitro cultivation of B. miyamotoi was described recently; but clinical isolation of relapsing fever Borrelia is cumbersome. Our aim was to develop a straightforward protocol enabling B. miyamotoi isolation directly from the blood of patients. METHODS: Modified Kelly-Pettenkorfer (MKP-F) medium, with or without anticoagulants, or blood from healthy human volunteers, was spiked with B...
July 2017: Clinical Microbiology and Infection
https://www.readbyqxmd.com/read/28098465/rejection-of-commonly-used-electrolytes-in-asymmetric-flow-field-flow-fractionation-effects-of-membrane-molecular-weight-cutoff-size-fluid-dynamics-and-valence-of-electrolytes
#16
Thilak K Mudalige, Haiou Qu, Sean W Linder
Asymmetric flow field flow fractionation (AF4) is an efficient size-based separation technique for the characterization of submicron size particulates. In AF4, membranes having various molecular weight cutoff sizes are used as a barrier to retain particles while allowing the carrier fluid containing electrolytes to permeate. Here, we have hypothesized that electrolyte rejection by the barrier membrane leads to the accumulation of electrolytes in the channel during operation. Electrolyte accumulation can cause various adverse effects that can lead to membrane fouling...
January 31, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28081368/smart-metal-organic-framework-coatings-triggered-antibiofilm-compound-release
#17
Birgit Claes, Tom Boudewijns, Laurens Muchez, Geert Hooyberghs, Erik V Van der Eycken, Jozef Vanderleyden, Hans P Steenackers, Dirk E De Vos
Metal-organic frameworks (MOFs) have a large potential for delivery of active molecules. Here, a MOF coating is investigated as a smart host matrix for triggered release of antibiofilm compounds. In addition to a coating consisting of the regular Fe-terephthalate MIL-88B(Fe), a new hydrophobic MIL-88B(Fe) coating is synthesized in hydrothermal conditions using palmitic acid as a lattice terminating group. These porous materials are used as a host matrix for the antibiofilm compound 5-(4-chlorophenyl)-N-(2-isobutyl)-2-aminoimidazole, which has a specific biofilm-inhibiting effect at concentrations at which no activity against planktonic cells is detected...
January 24, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28035151/effect-of-concentration-homogenization-and-stabilizing-salts-on-heat-stability-and-rheological-properties-of-cow-skim-milk-ultrafiltered-retentate
#18
Ganga Sahay Meena, Ashish Kumar Singh, Sanket Borad, Narender Raju Panjagari
Ultrafiltration (UF) of skimmed milk altered the composition of UF retentate and decreased the heat stability. Heat stability further reduced upon its subsequent homogenization or diafiltration. Poor heat stability of UF retentate restricts its processing at elevated temperatures. Therefore, this study was aimed to investigate the effect of protein concentration, homogenization and addition of stabilizing salts on the heat stability and rheological properties of UF retentates. Changes in the heat stability of fivefold homogenized UF retentate (5× HUFR) was studied in the pH range of 6...
November 2016: Journal of Food Science and Technology
https://www.readbyqxmd.com/read/28004566/antifouling-manganese-oxide-nanoparticles-synthesis-characterization-and-applications-for-enhanced-mr-imaging-of-tumors
#19
Peng Wang, Jia Yang, Benqing Zhou, Yong Hu, Lingxi Xing, Fanli Xu, Mingwu Shen, Guixiang Zhang, Xiangyang Shi
Antifouling manganese oxide (Mn3O4) nanoparticles (NPs) were synthesized by solvothermal decomposition of tris(2,4-pentanedionato) manganese(III) in the presence of trisodium citrate, followed by surface modification with polyethylene glycol and l-cysteine. The as-prepared nanoparticles have a uniform size distribution, good colloidal stability and good cytocompatibility. The modification of l-cysteine rendered the particles with much longer blood circulation time (half-decay time of 28.4 h) than those without l-cysteine modification (18...
January 11, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/27979117/structure-of-starch-aerogel-as-affected-by-crosslinking-and-feasibility-assessment-of-the-aerogel-for-an-anti-fungal-volatile-release
#20
Negar Abhari, Ashkan Madadlou, Ali Dini
Starch suspensions were crosslinked with trisodium citrate for either 0 or 17h, gelled and then freeze-dried to corresponding aerogels. The aerogel from the 17h-crosslinked suspension was loaded with the antifungal compound, trans-2-hexenal, and coated with the surfactant, sorbitan monooleate. Aerogel hardness was increased by the citrate-mediated crosslinking, whereas its adhesiveness decreased. Starch gelation decreased the crystallinity index (CrI) from 59% to ≈23%; however, the pre-gelation crosslinking resulted in a higher CrI value (i...
April 15, 2017: Food Chemistry
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