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https://www.readbyqxmd.com/read/27922205/one-pot-preparation-of-dimethyl-isosorbide-from-d-sorbitol-via-dimethyl-carbonate-chemistry
#1
Fabio Arico', Pietro Tundo, Alexander Aldoshin
Direct synthesis of dimethyl isosorbide (DMI) from D-sorbitol via dimethyl carbonate (DMC) chemistry is herein firstly reported. High yield of DMI was achieved using nitrogen superbase 1,5,7-triazabicyclo[4.4.0]dec-5-ene (TBD) as catalyst and performing the reaction in a stainless steel autoclave by increasing the temperature from 90°C to 200 °C. In this procedure DMC features its full capacity, acting in the different steps of the process as carboxymethylating, leaving group (cyclization) and methylating agent; DMC is also employed as the reaction media...
December 6, 2016: ChemSusChem
https://www.readbyqxmd.com/read/27914179/ammonothermal-synthesis-of-novel-nitrides-case-study-on-cagasin3
#2
Jonas Häusler, Lukas Neudert, Mathias Mallmann, Robin Niklaus, Anna-Carina L Kimmel, Nicolas S A Alt, Eberhard Schlücker, Oliver Oeckler, Wolfgang Schnick
The first gallium-containing nitridosilicate CaGaSiN3 was synthesized in newly developed high-pressure autoclaves using supercritical ammonia as solvent and nitriding agent. The reaction was conducted in ammonobasic environment starting from intermetallic CaGaSi with NaN3 as mineralizer. At 770 K, intermediate compounds were obtained, which were subsequently converted to the crystalline nitride at temperatures up to 1070 K (70 - 150 MPa). The impact of other mineralizers (e. g. LiN3, KN3 and CsN3) on the product formation was investigated as well...
December 3, 2016: Chemistry: a European Journal
https://www.readbyqxmd.com/read/27913083/different-biosorption-mechanisms-of-uranium-vi-by-live-and-heat-killed-saccharomyces-cerevisiae-under-environmentally-relevant-conditions
#3
Tieshan Wang, Xinyan Zheng, Xiaoyu Wang, Xia Lu, Yanghao Shen
Uranium adsorption mechanisms of live and heat-killed Saccharomyces cerevisiae in different pH values and biomass concentrations were studied under environmentally relevant conditions. Compared with live cells, the adsorption capacity of heat-killed cells is almost one order of magnitude higher in low biomass concentration and highly acidic pH conditions. To explore the mesoscopic surface interactions between uranium and cells, the characteristic of uranium deposition was investigated by SEM-EDX, XPS and FTIR...
November 29, 2016: Journal of Environmental Radioactivity
https://www.readbyqxmd.com/read/27908713/optimization-of-resistant-starch-formation-from-high-amylose-corn-starch-by-microwave-irradiation-treatments-and-characterization-of-starch-preparations
#4
Selime Mutlu, Kevser Kahraman, Serpil Öztürk
The effects of microwave irradiation on resistant starch (RS) formation and functional properties in high-amylose corn starch, Hylon VII, by applying microwave-storing cycles and drying processes were investigated. The Response Surface Methodology (RSM) was used to optimize the reaction conditions, microwave time (2-4min) and power (20-100%), for RS formation. The starch:water (1:10) mixtures were cooked and autoclaved and then different microwave-storing cycles and drying (oven or freeze drying) processes were applied...
November 28, 2016: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/27905946/chemically-and-thermally-stable-silica-nanowires-with-a-%C3%AE-sheet-peptide-core-for-bionanotechnology
#5
Zahraa S Al-Garawi, George E Kostakis, Louise C Serpell
BACKGROUND: A series of amyloidogenic peptides based on the sequence KFFEAAAKKFFE template the silica precursor, tetraethyl orthosilicate to form silica-nanowires containing a cross-β peptide core. RESULTS: Investigation of the stability of these fibres reveals that the silica layers protect the silica-nanowires allowing them to maintain their shape and physical and chemical properties after incubation with organic solvents such as 2-propanol, ethanol, and acetonitrile, as well as in a strong acidic solution at pH 1...
December 1, 2016: Journal of Nanobiotechnology
https://www.readbyqxmd.com/read/27894041/valorization-of-exhausted-sugar-beet-cossettes-by-successive-hydrolysis-and-two-fermentations-for-the-production-of-bio-products
#6
A B Díaz, C Marzo, I Caro, I de Ory, A Blandino
Exhausted sugar beet cossettes (ESBC) show an enormous potential as a source of sugars for the production of bio-products. Enzyme hydrolysis with the combined effect of mainly cellulases, xylanases and pectinases, turned out to be very efficient, obtaining almost double the concentration of sugars measured with the sole action of Celluclast® and β-glucosidase, and increasing 5 times the hydrolysis rate. As the sole pretreatment, ESBC soaked in the hydrolysis buffer were autoclaved, avoiding the application of severe conventional biomass pretreatments...
November 19, 2016: Bioresource Technology
https://www.readbyqxmd.com/read/27885829/autoclave-sterilization-of-pedot-pss-electrophysiology-devices
#7
Ilke Uguz, Mehran Ganji, Adel Hama, Atsunori Tanaka, Sahika Inal, Ahmed Youssef, Roisin M Owens, Pascale P Quilichini, Antoine Ghestem, Christophe Bernard, Shadi A Dayeh, George G Malliaras
Autoclaving, the most widely available sterilization method, is applied to poly(3,4-ethylenedioxythiophene) doped with polystyrene sulfonate (PEDOT:PSS) electrophysiology devices. The process does not harm morphology or electrical properties, while it effectively kills E. coli intentionally cultured on the devices. This finding paves the way to widespread introduction of PEDOT:PSS electrophysiology devices to the clinic.
November 25, 2016: Advanced Healthcare Materials
https://www.readbyqxmd.com/read/27884946/analysis-of-the-caenorhabditis-elegans-innate-immune-response-to-coxiella-burnetii
#8
James M Battisti, Lance A Watson, Myo T Naung, Adam M Drobish, Ekaterina Voronina, Michael F Minnick
The nematode Caenorhabditis elegans is well established as a system for characterization and discovery of molecular mechanisms mediating microbe-specific inducible innate immune responses to human pathogens. Coxiella burnetii is an obligate intracellular bacterium that causes a flu-like syndrome in humans (Q fever), as well as abortions in domesticated livestock, worldwide. Initially, when wild type C. elegans (N2 strain) was exposed to mCherry-expressing C. burnetii (CCB) a number of overt pathological manifestations resulted, including intestinal distension, deformed anal region and a decreased lifespan...
November 24, 2016: Innate Immunity
https://www.readbyqxmd.com/read/27878640/in-vitro-examination-of-the-biocompatibility-of-fibroblast-cell-lines-on-alloplastic-meshes-and-sterilized-polyester-mosquito-mesh
#9
R Wiessner, T Kleber, N Ekwelle, K Ludwig, D-U Richter
INTRODUCTION: The use of alloplastic implants for tissue strengthening when treating hernias is an established therapy worldwide. Despite the high incidence of hernias in Africa and Asia, the implantation of costly mesh netting is not financially feasible. Because of that various investigative groups have examined the use of sterilized mosquito netting. The animal experiments as well as the clinical trials have both shown equivalent short- and long-term results. The goal of this paper is the comparison of biocompatibility of human fibroblasts on the established commercially available nets and on sterilized polyester mosquito mesh over a period of 12 weeks...
November 23, 2016: Hernia: the Journal of Hernias and Abdominal Wall Surgery
https://www.readbyqxmd.com/read/27876902/evaluation-of-the-alum-naloxone-adjuvant-activity-against-experimental-murine-leishmaniasis-due-to-l-major
#10
REVIEW
Arezoo Bozorgomid, Habib Mohammadzadeh Hajipirloo, Khosrow Hazrati Tappeh, Naser Nazari, Seyed Ahmad Karamati, Samira Shirooie
Leishmaniasis is caused by intracellular parasites of Leishmania species, which are transmitted by the bite of the sandfly. Recovery and protection against the infection depends on the induction of a strong Th1 type of immune response. Vaccination of mice with the opioid antagonist naloxone can promote the activation of the Th1 responses. We studied the efficacy of the mixture of naloxone and alum, as an adjuvant, to enhance immune responses and induce protection against Leishmania major infection in BALB/c as a susceptible mouse model...
December 2016: Journal of Parasitic Diseases: Official Organ of the Indian Society for Parasitology
https://www.readbyqxmd.com/read/27866055/microstructure-and-nanoindentation-analyses-of-low-temperature-aging-on-the-zirconia-porcelain-interface
#11
M D Peng, J Q Wei, Y N Wang, Q Li
The aim of the present study was to investigate the effects of low-temperature aging on the micro-mechanical and micro-structural properties of zirconia-porcelain interface. In total, thirty-three Y-TZP zirconia blocks were fabricated by using CAD/CAM technology, veneered with porcelains. Specimens were submitted to low-temperature aging in an autoclave at 134°C, additional 0.2MPa pressure for 0h, 5h, or 10h. Flexural strength was obtained by using three-point bending test. Micro-mechanical properties (nano-hardness (H) and reduced modulus (Er)) were investigated by nanoindentation tests...
November 11, 2016: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/27862368/effects-of-heat-treatment-on-protein-feeds-evaluated-in%C3%A2-vitro-by-the-method-of-estimating-utilisable-crude-protein-at-the-duodenum
#12
M Vaga, M Hetta, P Huhtanen
The effect of heat treatment on the protein value of field beans, lupins and peas was studied using an in vitro method. Protein feeds were subjected to heat treatment for 30, 60 and 90 min in forced air oven at 120, 140 and 160 °C and in autoclave at 105, 120 and 135 °C. The heat-treated protein feeds were incubated in buffered rumen fluid together with grass silage and barley in complete isonitrogenous diets. The gas production (GP) was recorded continuously, and ammonia-N (NH3 -N) concentrations were determined during the in vitro incubation at 8, 24 and 48 h and used to determine the utilisable crude protein (uCP) at the duodenum at 16 h of incubation (uCP16 )...
November 11, 2016: Journal of Animal Physiology and Animal Nutrition
https://www.readbyqxmd.com/read/27825074/saliva-initiates-the-formation-of-pro-inflammatory-macrophages-in-vitro
#13
Solmaz Pourgonabadi, Heinz-Dieter Müller, João Rui Mendes, Reinhard Gruber
OBJECTIVES: Saliva can support oral wound healing, a process that requires a temporary inflammatory reaction. We have reported previously that saliva provokes a strong inflammatory response in oral fibroblasts. Bone marrow cells also give rise to macrophages, a heterogeneous subset of cell population involved in wound healing. Lipopolysaccharide (LPS) and interleukin 4 (IL-4) induce activation of pro-(M1), and anti-(M2) inflammatory macrophages, respectively. Yet, the impact of saliva on programming bone marrow cells into either M1 or M2 macrophages remains unclear ...
January 2017: Archives of Oral Biology
https://www.readbyqxmd.com/read/27810731/surface-micro-morphology-phase-transformation-and-mechanical-reliability-of-ground-and-aged-monolithic-zirconia-ceramic
#14
L F Guilardi, G K R Pereira, A Gündel, M P Rippe, L F Valandro
This study aimed to determine the effects of grinding and low temperature aging on the biaxial flexural strength, structural reliability (Weibull analysis), surface topography, roughness analysis, and phase transformation (t→m) of an yttrium-stabilized tetragonal zirconia polycrystalline ceramic. Ceramic discs (15.0×1.2±0.2mm, VITA In-Ceram YZ) were prepared and randomly assigned into six groups according to 2 factors (n=30): 'grinding' (Ctrl - without treatment, as-sintered; Xfine - grinding with extra fine diamond bur - 30µm; Coarse - grinding by coarse diamond bur - 151µm), and 'aging' (without or with aging: Ctrl(LTD); Xfine(LTD); Coarse(LTD))...
October 24, 2016: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/27802332/anti-arthritic-activity-of-schistosoma-mansoni-and-trichinella-spiralis-derived-antigens-in-adjuvant-arthritis-in-rats-role-of-foxp3-treg-cells
#15
Maha M Eissa, Dalia K Mostafa, Amany A Ghazy, Mervat Z El Azzouni, Laila M Boulos, Layla K Younis
A growing body of evidence supports the concept of helminths therapy in a variety of autoimmune diseases. Here, we aimed to investigate the protective effects of autoclaved Schistosoma mansoni antigen (ASMA) and Trichinella spiralis antigen (ATSA) on the clinical and immunopathological features of rheumatoid arthritis (RA). Adjuvant arthritis was induced by subcutaneous and intradermal injections of complete Freund's adjuvant into the plantar surface of the right hind paw and the root of the tail, respectively...
2016: PloS One
https://www.readbyqxmd.com/read/27784259/adsorption-assisted-photocatalytic-removal-of-methyl-orange-by-mgal2o4-sb2s3-composite-material
#16
Bushra Ismail, Muhammad Muneeb, Tanzeela Fazal, Abdur Rehman Khan, Mehwish Afzia
BACKGROUND: The current article is about the water treatment in which colored water contaminated by methyl orange has been used for adsorption assisted photocatalysis. Coupling of photocatalysis with the traditional water treatment processes has been in practice since last couple of years for the improvement of degradation efficiencies, for example, photocatalysis coupled with ultrafilteration, adsorption, flocculation, biological methods, photolysis, membrane distillation, etc. Among all these coupling approaches, adsorption assisted photocatalysis being a very simple and highly efficient approach is suffering from few drawbacks on the account of high cost, low stability and surface area of the adsorbent support...
October 25, 2016: Recent Patents on Nanotechnology
https://www.readbyqxmd.com/read/27783205/wild-boars-as-spore-dispersal-agents-of-ectomycorrhizal-fungi-consequences-for-community-composition-at-different-habitat-types
#17
Stav Livne-Luzon, Yael Avidan, Gil Weber, Hen Migael, Thomas Bruns, Ofer Ovadia, Hagai Shemesh
The success of dispersal events depend on the organism's ability to reach and establish in a new habitat. In symbiotic organisms, establishment also depends on the presence of their symbiont partner in the new habitat. For instance, the establishment of obligate ectomycorrhizal (EM) trees outside the forest is largely limited by the presence of EM fungi in soil. Wild boars (Sus scrofa) are important dispersal agents of EM fungal spores, particularly in the moderately dry Mediterranean region. The aim of this study was to explore how EM fungal spores dispersed by wild boars influence the EM fungal community associated with the roots of Pinus halepensis seedlings at different habitat types...
October 26, 2016: Mycorrhiza
https://www.readbyqxmd.com/read/27782374/effect-of-disinfection-and-sterilization-on-the-tensile-strength-surface-roughness-and-wettability-of-elastomers
#18
Sunil Babu Kotha, Ravikumar Ramakrishnaiah, Darshan Devang Divakar, Sree Lalita Celur, Saad Qasim, Jukka P Matinlinna
AIM: The aim of the present study was to evaluate the effect of chemical disinfection, autoclave, and microwave sterilization on some of the key properties of elastomers. METHODS: Five polyvinylsiloxane elastomeric impression materials were evaluated. Forty samples were fabricated from each material. The samples were randomly selected and assigned to four experimental groups with 50 samples each: group I, control; group II,chemical disinfection; group III, autoclave sterilization; and group IV, microwave sterilization...
October 26, 2016: Journal of Investigative and Clinical Dentistry
https://www.readbyqxmd.com/read/27781220/template-free-synthesis-of-ordered-zno-zns-core-shell-arrays-for-high-performance-supercapacitors
#19
Hailong Yan, Tong Li, Yang Lu, Jinbing Cheng, Tao Peng, Jinyou Xu, Linying Yang, Xiangqiang Hua, Yunxin Liu, Yongsong Luo
In this article, ordered ZnO@ZnS core-shell structures have been produced on a stainless mesh by a two-step approach without using a template. ZnO nanorods fabricated by a chemical vapor method are transferred into a 50 ml autoclave for a second stage ion-exchange reaction followed by heating at 120 °C for 4-16 h. The ZnO core is prepared as the conducting channel and ZnS as the active material. Such unique architecture exhibits remarkable electrochemical performance with high capacitance and desirable cycle life...
October 26, 2016: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/27777012/characterization-of-rhizobia-isolates-obtained-from-nodules-of-wild-genotypes-of-common-bean
#20
Aline Assis Cardoso, Michel de Paula Andraus, Tereza Cristina de Oliveira Borba, Claudia Cristina Garcia Martin-Didonet, Enderson Petrônio de Brito Ferreira
This study aimed to evaluate the tolerance to salinity and temperature, the genetic diversity and the symbiotic efficiency of rhizobia isolates obtained from wild genotypes of common bean cultivated in soil samples from the States of Goiás, Minas Gerais and Paraná. The isolates were subjected to different NaCl concentrations (0%, 1%, 2%, 4% and 6%) at different temperatures (28°C, 33°C, 38°C, 43°C and 48°C). Genotypic characterization was performed based on BOX-PCR, REP-PCR markers and 16S rRNA sequencing...
October 4, 2016: Brazilian Journal of Microbiology: [publication of the Brazilian Society for Microbiology]
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