A polystyrene divinyl benzene based resin containing bicine groups has been prepared and its analytical properties investigated. The pH dependence of sorption of metal on the resin has been determined for Cu(II), Fe(II), Ni(II), Co(II), Zn(II), Hg(II) and Pb(II). The important characteristics ...
The ion-exchange retention behavior of titania synthesized in our laboratory was investigated by ion chromatography of inorganic anions and cations. Dilute acetic acid-sodium acetate and bicine-sodium hydroxide buffers were used as mobile phases with no use of suppressor. We observed that the ...
The crystal structures of [Cu(Bic)(Bz)]ClO 4 and [Cu(Bic)(Iq)]ClO 4 (Bic - =N,N-bis(2-hydroxyethyl)glycinate, Bz=benzimidazole and Iq=isoquinoline) were determined by single-crystal X-ray diffraction techniques. [Cu(Bic)(Bz)]ClO 4 : monoclinic system, space group ...
In this study, the tautomeric equilibrium between the phenol-imine and keto-amine structural forms of (E)-4,6-dibromo-2-[(4-fluorophenylimino)methyl]-3-methoxyphenol compound has been investigated with experimental (XRD, UV–vis and NMR) and theoretical (DFT and TD-DFT) methods. The results clea...
The molecular structure and spectroscopic properties of (E)-2-((4-hydroxy-2-methylphenylimino)methyl)-3-methoxyphenol, were characterized by X-ray diffraction, FT-IR and UV–Vis spectroscopy. All of theoretical calculations and optimized geometric parameters have been calculated by using density...
In this study, (E)-4,6-dibromo-2-[(3,5-dimethylphenylimino)methyl]-3-methoxyphenol and (E)-4,6-dibromo-2-[(2,6-dimethylphenylimino)methyl]-3-methoxyphenol compounds have been synthesized and characterized by using X-ray crystallographic method, FT-IR and Density functional method. The molecular ...
1,12-Dihydroxydodecane and 1,22-dihydroxydocosane were prepared from diacetylene precursors in such a way that the four central methylene groups were deuterated. These deuterated spacers were polycondensed with the acid chloride of N-(4 -carboxyphenyl)trimellitimide. Analogous poly(esterimide...
4-Aminobenzoic acid (PABA) has been successfully separated from a mixture containing 2-aminobenzoic acid and (2R,3R)-tartaric acid. X-ray structure analysis confirms the separating result. The molecular complex formed by PABA and tartaric acid in 1:1 molar ratio crystallizes in the orthorhombic ...
A new mesogene diester based on phenyltrimellitimide was synthesized and used as a condensation monomer in combination with a number of aliphatic diols to render novel poly(ester-amide-imide)s (PEAIs). The melt polycondensation method provided polymers of moderate inherent viscosity, that were ...
Gallic acid (3,4,5‐trihydroxybenzoic acid, GA) is widely distributed in nature, being a major phenolic pollutant and a commonly used antioxidant and building‐block for drug development. We have characterized the first complete cluster (gal genes) responsible for growth in GA in a derivative of...
BACKGROUND The present study demonstrates the decomposition of pentachlorophenol (PCP) by the Fenton reaction in the presence of gallic acid (GA). Unlike other studies, catalytic Fe2+ concentrations were used with respect to PCP in an effort to evaluate an environmentally benign Fenton system, s...
Hyperlipidemia is the major risk factors of heart disease such as atherosclerosis, stroke, and death. In the present study, we studied the effect of gallic acid (GA), linoleic acid (LA), mixture of GA and LA (MGL), and chemically synthesized gallic acid–linoleic acid ester (octadeca-9,12-dienyl...
Conductivity measurements of DL-pyroglutamic acid and sodium pyroglutamate in dilute aqueous solutions were performed in the 288.15–323.15 K temperature range. The limiting molar conductances of pyroglutamate anion, λo(pGlu−, T) and the dissociation constants of pyroglutamic acid, K(T) were de...
1-Chloro-4-methyl-1,1,2,2,3,3,4,4-octaphenyltetrasilane was employed as an initiator in the Wurtz-type reductive coupling polymerisations of dichloromethylphenylsilane with sodium in toluene at 65°C. Yields of polymethylphenylsilane (PMPS) were in the range 32–35% which was almost double that ...
Changes in the structure, hydrophobicity, and hydrothermal stability of organo-inorganic composite materials based on MCM-41 as a result of silylation with dimethoxydimethylsilane (DMODMS) and dichloromethylphenylsilane (DCMPS) were considered. Based on the data on the competitive adsorption of ...
The electrooxidation of dimethoxymethane (DMM) and trimethoxymethane (TMM) was studied at different platinum-based electrocatalysts deposited onto a titanium mesh substrate by thermal decomposition of chloride precursors. Half-cell tests showed an increase in oxidation current for the methoxy fu...
Conformations of trimethoxymethane (TMM) were studied using matrix isolation infrared spectroscopy and ab initio computations performed at the HF and B3LYP levels, using a 6-31++G ∗∗ basis set. Computationally, six minima were identified on the potential surface, of which the conformer w...
The oxidation of trimethoxymethane (TMM) (trimethyl orthoformate) in a direct oxidation PBI fuel cell was examined by on-line mass spectroscopy and on-line FTIR spectroscopy. The results show that TMM was almost completely hydrolyzed in a direct oxidation fuel cell which employs an acid doped po...
Bowel obstruction may be an inoperable complication in patients with end-stage cancer. Scopolamine butylbromide (SB) and octreotide (OCT) have been successfully used with the aim of reducing gastrointestinal (GI) secretions to avoid placement of a nasogastric tube (NGT); however, there have been...
Background The aim of this randomized controlled study was to determine whether octreotide (OCT) or scopolamine butylbromide (SB) was the more effective antisecretive drug controlling gastrointestinal (GI) symptoms due to malignant bowel obstruction (MBO) caused by advanced ovarian cancer. ...
About|Contact|Cas|Product Name|Molecular|Country|Encyclopedia
Message|New Cas|MSDS|Service|Advertisement|CAS DataBase|Article Data|Manufacturers | Chemical Catalog
©2008 LookChem.com,License: ICP
NO.:Zhejiang16009103
complaints:service@lookchem.com Desktop View