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https://www.readbyqxmd.com/read/28933505/sbvo4-nanoparticles-synthesized-via-three-facile-one-pot-methods-controllable-morphologies-and-superhydrophobic-coatings
#1
Ximeng Liu, Xiaojuan Yang, Feng Li, Taohai Li, Wei Cao
Inert colloidal SbVO4 with special morphologies is promising for practical superhydrophobic coatings. However, its conventional synthesis suffers from harsh preparation conditions, limiting the material applications. Herein, by using K6V10O28·9H2O as a novel vanadium source, SbVO4 nanoparticles were prepared through three different facile methods: hydrothermal method, reflux method and ultrasonic method. The pH values of the reaction environment were tuned as the only variable to shape the final products. Colloidal morphologies can be engineered to microflakes, or amalgamations of nanoparticles...
September 21, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28933496/amphoteric-water-as-acid-and-base-for-protic-ionic-liquids-and-their-electrochemical-activity-when-used-as-fuel-cell-electrolytes
#2
Muhammed Shah Miran, Tomohiro Yasuda, Ryoichi Tatara, Md Abu Bin Hasan Susan, Masayoshi Watanabe
Amphoteric water was mixed with equimolar amounts of a super-strong acid, trifluoromethanesulfonic acid (TfOH), and a super-strong base, 1,8-diazabicyclo[5.4.0]-7-undecene (DBU). Bulk physicochemical and electrochemical properties of the mixtures were compared with those of the best ever reported protic ionic liquid (PIL), diethylmethylammonium trifluoromethanesulfonate ([dema][TfO]), which has excellent physicochemical properties as a fuel cell electrolyte. The acidic mixture ([H3O][TfO]) behaved as a protic ionic liquid, while the basic mixture ([DBU]OH) showed incomplete proton transfer...
September 21, 2017: Faraday Discussions
https://www.readbyqxmd.com/read/28933328/-local-application-of-tranexamic-acid-in-total-hip-arthroplasty-decreases-blood-loss-and-consumption-of-blood-transfusion
#3
J Lošťák, J Gallo, M Večeřa, J Špička, K Langová
PURPOSE OF THE STUDY The primary aim of our study was to identify the effects of local application of tranexamic acid (TXA, Exacyl) on the amount of postoperative blood loss and blood transfusion requirement in primary total hip arthroplasty. We also recorded the levels of postoperative haemoglobin and its drop in early period after surgery. In each patient, we monitored in detail the incidence of early complications (haematoma, wound exudate). Lastly, the economic aspect of TXA administration was also taken into account...
2017: Acta Chirurgiae Orthopaedicae et Traumatologiae Cechoslovaca
https://www.readbyqxmd.com/read/28933085/-effects-of-different-concentrations-of-nitrogen-and-phosphorus-on-growth-and-active-components-of-salvia-miltiorrhiza
#4
Gui-Hui Xia, Qiu-Ling Wang, Wen-Quan Wang, Jun-Ling Hou, Qing-Yan Song, Lin Luo, Dou-Dou Zhang, Xiang Yang
With annual Salvia miltiorrhiza seedlings as experimental material, using "3414" optimal regression design recommended by the Ministry of Agriculture and regularly watered with nutrient solution, through the dynamic sampling of S. miltiorrhiza in different growing stages, and the growth index, dry weight of plant root and content of active components were measured. The potted experiments were applied to study the effects of different nitrogen and phosphorus ratios on the growth, dry matter accumulation and accumulation of active components of S...
November 2016: Zhongguo Zhong Yao za Zhi, Zhongguo Zhongyao Zazhi, China Journal of Chinese Materia Medica
https://www.readbyqxmd.com/read/28931958/descriptors-for-pentane-2-4-dione-and-its-derivatives
#5
Michael H Abraham, William E Acree
We have used equations for partition coefficients of compounds from water and the gas phase to various solvents to obtain descriptors for pentane-2,4-dione and 21 of its derivatives. These descriptors can then be used to estimate further partition coefficients into a wide variety of solvents. The descriptors also yield information about the properties of pentane-2,4-dione and its derivatives. Pentane-2,4-dione and its alkyl derivatives are quite polar, with substantial hydrogen bond basicity but with no hydrogen bond acidity...
2017: Journal of Solution Chemistry
https://www.readbyqxmd.com/read/28931913/cell-free-synthesis-of-functional-antibodies-using-a-coupled-in-vitro-transcription-translation-system-based-on-cho-cell-lysates
#6
M Stech, O Nikolaeva, L Thoring, W F M Stöcklein, D A Wüstenhagen, M Hust, S Dübel, S Kubick
Antibodies are indispensable tools for basic research as well as diagnostic and therapeutic applications. Consequently, the development of alternative manufacturing strategies which circumvent the hurdles connected to conventional antibody production technologies is of enormous interest. To address this issue, we demonstrate the synthesis of complex antibody formats, in particular immunoglobulin G (IgG) and single-chain variable fragment Fc fusion (scFv-Fc), in a microsome-containing cell-free system based on translationally active chinese hamster ovary (CHO) cell lysates...
September 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28930796/navigating-t-cell-immunometabolism-in-transplantation
#7
Naoki Tanimine, Laurence A Turka, Bhavana Priyadharshini
Recently, a new discipline termed "immunometabolism" has transformed the field of immunology. It encompasses the study of the intrinsic metabolic pathways of different immune subsets and their impact on cellular fate and function. For instance, broadly speaking, pro-inflammatory cells depend upon glycolysis and glutamine oxidation while cells involved in anti-inflammatory response such as Foxp3+ regulatory T cells (Tregs) utilize predominantly fatty acid oxidation. However, while a useful paradigm, this actually is a reductionist view and the engagement of these metabolic pathways is not mutually exclusive between these subsets...
September 19, 2017: Transplantation
https://www.readbyqxmd.com/read/28928222/single-subunit-oligosaccharyltransferases-of-trypanosoma-brucei-display-different-and-predictable-peptide-acceptor-specificities
#8
Anders A J Jinnelov, Liaqat Ali, Michele Tinti, Michael A J Ferguson
Trypanosoma brucei causes African trypanosomiasis and contains three full-length oligosaccharyltransferase (OST) genes; two of which, TbSTT3A and TbSTT3B, are expressed in the bloodstream form of the parasite. These OSTs have different peptide acceptor and lipid-linked oligosaccharide donor specificities and trypanosomes do not follow many of the canonical rules developed for other eukaryotic N-glycosylation pathways, raising questions as to the basic architecture and detailed function of trypanosome OSTs. Here, we show by blue-native gel electrophoresis and stable isotope labelling in cell culture proteomics that the TbSTT3A and TbSTT3B proteins associate with each other in large complexes that contain no other detectable protein subunits...
September 19, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28927928/discerning-the-composition-of-penetratin-for-safe-penetration-from-cornea-to-retina
#9
Kuan Jiang, Xin Gao, Qing Shen, Changyou Zhan, Yanyu Zhang, Cao Xie, Gang Wei, Weiyue Lu
Delivery of biomacromolecules into the eye is greatly hindered by several protective barriers. The cell-penetrating peptide, penetratin, has been found to be an effective absorption enhancer for noninvasive intraocular gene delivery. To discern the composition of penetratin for safe penetration from cornea to retina, we designed a series of penetratin derivatives by varying the hydrophobicity and evaluated their potency for retina-targeted delivery. The hydrophilic amino acids of penetratin, excluding the conserved basic amino acid residues, were respectively replaced with tryptophan...
September 16, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28927604/preparation-of-a-novel-chitosan-based-biosorbent-cross-linked-with-phenethylamine-for-adsorption-of-aromatic-amino-acids
#10
Wen Jiang, Yang Yang, Renyou Tao, Xiaoqin Jiang, Xiaohua Zhou, Zhiming Zhou
Rice protein was successively hydrolyzed by rice protein hydrolysis special enzyme, chymotrypsin and carboxypeptidases A. Then a novel chitosan-based biosorbent cross-linked with phenethylamine (PMCCR) was synthesized and firstly used for adsorption of aromatic amino acids (AAA) from rice protein enzymatic hydrolysates (RPEH). The characterizations of PMCCR indicated that phenethylamine was successfully cross-linked with chitosan, and the particle size of PMCCR was 500-1000μm with pore diameter of 50-100μm...
November 15, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28927597/active-and-smart-biodegradable-packaging-based-on-starch-and-natural-extracts
#11
Carolina Medina-Jaramillo, Oswaldo Ochoa-Yepes, Celina Bernal, Lucía Famá
Active and smart biodegradable films from cassava starch and glycerol with 5wt.% of different natural extracts such as green tea and basil were obtained by casting. Their functional capacity as antioxidants and their physicochemical properties achieved from the incorporation of these types of extracts were evaluated. The content of phenolic compounds in the extracts led to films with significant antioxidant activity, being greater in the case of the system containing green tea extract. Color changes in both materials after immersion in different media (acid and basic) due to the presence of chlorophyll and carotenoids in the extracts were observed, but the film with basil extract reacted most notably to the different pH...
November 15, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28926767/stabilization-of-t4-bacteriophage-at-acidic-and-basic-ph-by-adsorption-on-paper
#12
Abigail Meyer, Melissa Greene, Chad Kimmelshue, Rebecca Cademartiri
Bacteriophages find applications in agriculture, medicine, and food safety. Many of these applications can expose bacteriophages to stresses that inactivate them including acidic and basic pH. Bacteriophages can be stabilized against these stresses by materials including paper, a common material in packaging and consumer products. Combining paper and bacteriophages creates antibacterial materials, which can reduce the use of antibiotics. Here we show that adsorption on paper protects T4, T5, and T7 bacteriophage from acidic and basic pH...
September 5, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/28926692/aldol-reaction-of-n-tert-butanesulfinyl-imidates-under-basic-conditions-for-diastereoselective-synthesis-of-anti-aldols
#13
Chun-Tian Li, Hui Liu, Yan-Jun Xu, Chong-Dao Lu
Diastereoselective aldol reaction of N-tert-butanesulfinyl imidates under typical hard enolization conditions is reported. Potassium bis(trimethylsilyl)amide (KHMDS) effectively promotes the aldol reaction of α-aryl- and α-alkyl-substituted imidates, providing anti-aldol adducts in high yields with good to excellent diastereoselectivities. In the case of α-aryl imidates, high conversion depends on adding trimethylsilyl chloride (TMSCl) to the reaction mixture. In the presence of a suitable Lewis acid, cyclohexanone is a good electrophile in the aldol reaction of imidates...
September 19, 2017: Journal of Organic Chemistry
https://www.readbyqxmd.com/read/28926059/br%C3%A3-nsted-acidity-in-deep-eutectic-solvents-and-ionic-liquids
#14
Andrew P Abbott, Sahar S M Alabdullah, Azhar Y M Al-Murshedi, Karl S Ryder
Despite the importance of ionic liquids in a variety of fields, little is understood about the behaviour of protons in these media. The main difficulty arises due to the unknown activity of protons in non-aqueous solvents. This study presents acid dissociation constants for nine organic acids in deep eutectic solvents (DESs) using standard pH indicator solutes. The pKIn value for bromophenol blue was found by titrating the DES with triflic acid. The experimental method was developed to understand the acid-base properties of deep eutectic solvents, and through this study it was found that the organic acids studied were slightly less dissociated in the DES than in water with pKa values between 0...
September 19, 2017: Faraday Discussions
https://www.readbyqxmd.com/read/28925983/structure-dependent-interfacial-properties-of-chaplin-f-from-streptomyces-coelicolor
#15
Mina Dokouhaki, Emma L Prime, Andrew Hung, Greg G Qiao, Li Day, Sally L Gras
Chaplin F (Chp F) is a secreted surface-active peptide involved in the aerial growth of Streptomyces. While Chp E demonstrates a pH-responsive surface activity, the relationship between Chp F structure, function and the effect of solution pH is unknown. Chp F peptides were found to self-assemble into amyloid fibrils at acidic pH (3.0 or the isoelectric point (pI) of 4.2), with ~99% of peptides converted into insoluble fibrils. In contrast, Chp F formed short assemblies containing a mixture of random coil and β-sheet structure at a basic pH of 10...
September 19, 2017: Biomolecules
https://www.readbyqxmd.com/read/28925520/rational-design-of-bifunctional-2-fold-interpenetrated-zn-ii-metal-organic-framework-for-selective-adsorption-of-co2-and-efficient-aqueous-phase-sensing-of-2-4-6-trinitrophenol
#16
C M Nagaraja, Sandeep Dhankhar, Nayuesh Sharma, Sandeep Kumar, Dhilip Kumar
A bifunctional, microporous Zn(II) metal-organic framework, [Zn2(NH2BDC)2(dpNDI)]n (MOF1) (where, NH2BDC =2-aminoterephthalic acid, dpNDI =N,N'-di(4-pyridyl)-1,4,5,8-naphthalenediimide) has been synthesized solvothermally. MOF1 shows a 2-fold interpenetrated, 3D pillar-layered framework structure composed of two types of 1D channels with dimensions of ~3.80 x 16.9 Å2 and 7.49 x 17.01 Å2 decorated with pendent -NH2 group. Owing to the presence of basic functionalized pore surface, MOF1 exhibits selective adsorption of CO2 with high value of heat of adsorption (Qst = 46...
September 19, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28925025/ring-opening-polymerization-of-l-lactide-to-cyclic-poly-lactide-by-zeolitic-imidazole-framework-8-catalyst
#17
Zhixiong Luo, Somboon Chaemchuen, Kui Zhou, Francis Verpoort
The catalytic activity of ZIF-8 in the ring-opening polymerization of L-lactide without solvents or co-catalysts is presented for the first time. Two different synthetic strategies have been applied for synthesizing ZIF-8, either under solvothermal condition or by spray-drying procedure. Their catalytic activities are found to be correlating with the presence of open active sites in ZIF-8 structure. The structural defects which afford active acid and basic sites are supposed to cooperatively catalyze the reaction...
September 18, 2017: ChemSusChem
https://www.readbyqxmd.com/read/28924983/synergistic-configuration-of-diols-as-br%C3%A3-nsted-bases
#18
Ye-Jin Kim, Surajit Rakshit, Geun Young Jin, Prasun Ghosh, Young Min Lee, Won-Woo Park, Yung Sam Kim, Oh-Hoon Kwon
As viscous hydroxylic organic compounds, diols are of interest for their functional molecular conformation, which is based on inter- and intramolecular hydrogen (H)-bonds. By utilising steady-state electronic and vibrational spectroscopy, time-resolved fluorescence spectroscopy, and computational analyses, we report the association of the hydroxyl groups of diols via intra- or intermolecular H-bonds to enhance their reactivity as a base. Whereas the formation of an intermolecularly H-bonded dimer is requisite for diols of weak intramolecular H-bond to extract a proton from a model strong photoacid, a well-configured single diol molecule having an optimised intramolecular H-bond is revealed to serve as an effective Brønsted base with increased basicity...
September 18, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28924945/hydrogen-fluoride-hf-substance-flow-analysis-for-safe-and-sustainable-chemical-industry
#19
Junbeum Kim, Yongwoo Hwang, Mijin Yoo, Sha Chen, Ik-Mo Lee
In this study, the chemical substance flow of hydrogen fluoride (hydrofluoric acid, HF) in domestic chemical industries in 2014 was analyzed in order to provide a basic material and information for the establishment of organized management system to ensure safety during HF applications. A total of 44,751 tons of HF was made by four domestic companies (in 2014); import amount was 95,984 tons in 2014 while 21,579 tons of HF was imported in 2005. The export amount of HF was 2180 tons, of which 2074 ton (China, 1422 tons, U...
September 18, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28922023/fatty-acid-synthase-fasn-as-a-therapeutic-target-in-breast-cancer
#20
Javier A Menendez, Ruth Lupu
Ten years ago, we put forward the metabolo-oncogenic nature of fatty acid synthase (FASN) in breast cancer. Since the conception of this hypothesis, which provided a model to explain how FASN is intertwined with various signaling networks to cell-autonomously regulate breast cancer initiation and progression, FASN has received considerable attention as a therapeutic target. However, despite the ever-growing evidence demonstrating the involvement of FASN as part of the cancer-associated metabolic reprogramming, translation of the basic science-discovery aspects of FASN blockade to the clinical arena remains a challenge...
September 18, 2017: Expert Opinion on Therapeutic Targets
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