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Tetrabutylammonium Hydroxide
Bos ME
e-EROS Encyclopedia of Reagents for Organic Synthesis. (2001)
Małgorzata Anita Bryszewska et al.
Journal of trace elements in medicine and biology : organ of the Society for Minerals and Trace Elements (GMS), 29, 91-98 (2014-12-04)
In this study, we investigate the type and quantity of selenium compounds in fish and marine organisms, using ion-pair reversed phase LC–ICP-MS, developed and applied for the analysis of Atlantic cod, Atlantic salmon, Greenland halibut, Atlantic herring, blue mussel, common
Rosa M Suárez et al.
Molecules (Basel, Switzerland), 17(8), 8735-8741 (2012-07-27)
The synthesis of 9,9'-[1,2-ethanediylbis(oxymethylene)]bis-2-amino-1,9-dihydro-6H-purin-6-one, a minor impurity of acyclovir, is described. Starting with commercial N-(9-acetyl-6-oxo-1H-purin-2-yl)acetamide, the process uses an acid catalysed phase transfer catalysis (PTC) process to produce the selective alkylation at the 9 position of the guanine ring.
Noelia Luque et al.
Journal of chromatography. A, 1248, 74-83 (2012-06-26)
The suitability of a mixed-mode sorbent made up of admicelles of sodium dodecyl sulphate (SDS) and tetrabutylammonium (TBA) to extract and preserve pesticides from river and underground water was assessed. Pesticides belonging to different structural groups (i.e. triazines, carbamates, phenylureas
Hiroshi Matsui et al.
The Journal of chemical physics, 143(2), 024503-024503 (2015-07-17)
In low dimensional cesium silicate LDS-1 (monoclinic phase of CsHSi2O5), anomalous infrared absorption bands observed at 93, 155, 1210, and 1220 cm(-1) are assigned to the vibrational mode of protons, which contribute to the strong hydrogen bonding between terminal oxygen
Block and Graft Copolymers of Pivalolactone. 3. Grafts on Ethylene Copolymers
Sundet SA
Macromolecules, 11(1), 146-149 (1978)
Meyliana Wulandari et al.
Analytical and bioanalytical chemistry, 407(3), 803-812 (2014-07-25)
This paper describes the synthesis of novel molecularly imprinted polymers (MIPs), prepared by a noncovalent imprinting approach, for cleanup and preconcentration of curcumin (CUR) and bisdemethoxycurcumin (BDMC) from medicinal herbal extracts and further analysis by high-performance liquid chromatography with fluorescence
Ya-Wen Chang et al.
Physical review letters, 108(24), 247802-247802 (2012-09-26)
The phase behavior of charged disk suspensions displays a strong dependence on ionic strengths, as the interplay between excluded volume and electrostatic interactions determines the formation of glasses, gels, and liquid crystal states. The various ions in natural soil or
Jacek Cieślak et al.
Current protocols in nucleic acid chemistry, Chapter 4, Unit4-Unit4 (2012-09-08)
The conversion of 3',5'-disilylated 2'-O-(methylthiomethyl)ribonucleosides to 2'-O-(phthalimidooxymethyl)ribonucleosides is achieved in yields of 66% to 94%. Desilylation and dephtalimidation of these ribonucleosides by treatment with NH(4)F in MeOH produce 2'-O-aminooxymethylated ribonucleosides, which are efficient in producing stable and yet reversible 2'-conjugates
Ye Rin Choi et al.
Chemical communications (Cambridge, England), 48(83), 10346-10348 (2012-09-18)
A series of synthetic molecules bearing the same hydrogen bonding mode observed in StClC were prepared and their transport ability of chloride ion across a lipid membrane was systematically optimized.
Toshihiro Kimura et al.
Inorganic chemistry, 51(23), 13001-13008 (2012-11-15)
A simple monomeric tungstate, TBA(2)[WO(4)] (I, TBA = tetra-n-butylammonium), could act as an efficient homogeneous catalyst for chemical fixation of CO(2) with 2-aminobenzonitriles to quinazoline-2,4(1H,3H)-diones. Various kinds of structurally diverse 2-aminobenzonitriles could be converted into the corresponding quinazoline-2,4(1H,3H)-diones in high
Zhenfeng He et al.
Dalton transactions (Cambridge, England : 2003), 41(33), 10043-10051 (2012-05-29)
A new kind of organic-inorganic hybrid complexes based on polyoxometalate were synthesized through symmetrically grafting two adeninyl groups onto Anderson-type MnMo(6) clusters and encapsulating the clusters by organic surfactants. The resultant complexes exhibited thermal-induced dynamic self-assembly behaviors which greatly depended
Chao Zhong et al.
Carbohydrate polymers, 94(1), 38-45 (2013-04-03)
In this article, a novel and high efficient solvent, tetra-n-Butylammonium Hydroxide (TBAH), was used for dissolution and isolation of straw cellulose from wheat straw. The composition analysis with gas chromatography (GC) and the spectroscopic characterization analysis conducted by X-Ray diffraction
Y B Zhou et al.
Water science and technology : a journal of the International Association on Water Pollution Research, 66(4), 810-815 (2012-07-07)
Removal of phenanthrene (PHE) from aqueous solution by adsorption onto quaternary ammonium surfactant modified peat was studied. The results show that surfactant modification enhanced the PHE adsorption capacity of peat. Low temperature and neutral pH favored PHE adsorption. Peat modified
Purnandhu Bose et al.
Chemistry, an Asian journal, 7(10), 2373-2380 (2012-07-26)
A new series of tris(2-aminoethyl)amine (tren)-based L-alanine amino acid backboned tripodal hexaamide receptors (L1-L5) with various attached moieties based on electron-withdrawing fluoro groups and lipophilicity have been synthesized and characterized. Detailed binding studies of L1-L5 with different anions, such as
Shohei Sakashita et al.
Organic letters, 15(17), 4308-4311 (2013-08-21)
Palladium-catalyzed Suzuki-Miyaura cross-coupling reactions of tetrabutylammonium 2-pyridyltriolborate salts with various aryl (heteroaryl) chlorides can produce the corresponding desired coupling products with good to excellent yields. These tetrabutylammonium salts are more reactive than the corresponding lithium salts. The coupling reactions with
Hannah K Wayment-Steele et al.
ACS applied materials & interfaces, 6(12), 9093-9099 (2014-05-23)
Understanding the kinetics of dye adsorption and desorption on semiconductors is crucial for optimizing the performance of dye-sensitized solar cells (DSSCs). Quartz crystal microbalance with dissipation monitoring (QCM-D) measures adsorbed mass in real time, allowing determination of binding kinetics. In
Shintaro Itagaki et al.
Chemical communications (Cambridge, England), 48(74), 9269-9271 (2012-08-10)
In the presence of Rh(2)(OAc)(4) (OAc = acetate) and TBA(2)WO(4) (TBA = tetra-n-butylammonium), the N-silylation of indole derivatives with hydrosilanes efficiently proceeded to give the corresponding N-silylated indoles in high yields. Pyrrole and carbazole were also N-silylated with the combined
Michelle L Ingalsbe et al.
Bioorganic & medicinal chemistry letters, 19(17), 4984-4987 (2009-08-08)
Due to the increasing number of strains of drug-resistant bacteria, the development of new antibiotics has become increasingly important. The antibacterial properties of quaternary amines and their derivatives on both Gram-positive and Gram-negative bacteria are well known. However, an encompassing
Kosei Sugahara et al.
Chemical communications (Cambridge, England), 48(67), 8422-8424 (2012-07-14)
A tetra-n-butylammonium (TBA) salt of a γ-Keggin -6-charged germanodecatungstate, [γ-H(2)GeW(10)O(36)](6-) (I), could act as an efficient homogeneous catalyst for Knoevenagel condensation of active methylene compounds with carbonyl compounds.
Rapid base-catalyzed deuterium exchange at the ring-adjacent methyl and methylene positions of octaalkyl and natural-derivative porphyrins and metalloporphyrins.
Godziela GM, et al.
Inorganic Chemistry, 25(23), 4286-4288 (1986)
Amir Hossein Abdolghaffari et al.
Life sciences, 139, 30-39 (2015-08-05)
Aluminum phosphide (AlP) is a widely used fumigant and rodenticide. While AlP ingestion leads to high mortality, its exact mechanism of action is unclear. There are ample evidences suggesting cardioprotective effects of triiodothyronine (T3). In this study, we aimed to
Xueyan Zheng et al.
Carbohydrate polymers, 111, 25-32 (2014-07-20)
Tetraalkylammonium hydroxides have been found to mediate regioselective deacylation of cellulose esters. This deacylation surprisingly shows substantial selectivity for the removal of the acyl groups at O-2/3, affording cellulose-6-O-esters by a simple, efficient one-step process. The mechanism for this deacylation
Mary Y Ryan et al.
Channels (Austin, Tex.), 6(6), 443-452 (2012-10-16)
RNA editing at four sites in eag, a Drosophila voltage-gated potassium channel, results in the substitution of amino acids into the final protein product that are not encoded by the genome. These sites and the editing alterations introduced are K467R
Ju-Hwan Park et al.
Colloids and surfaces. B, Biointerfaces, 121, 380-387 (2014-07-06)
Doxorubicin (DOX)-loaded nanoparticles (NPs) based on interconnected hyaluronic acid-ceramide (HACE) structure were fabricated and their anti-tumor efficacy was evaluated in vitro. Interconnected HACE was synthesized by cross-linking HACE with adipic acid dihydrazide (ADH) and its synthesis was identified by (1)H
David J Posson et al.
Nature structural & molecular biology, 20(2), 159-166 (2012-12-25)
Understanding how ion channels open and close their pores is crucial for comprehending their physiological roles. We used intracellular quaternary ammonium blockers, electrophysiology and X-ray crystallography to locate the voltage-dependent gate in MthK potassium channels from Methanobacterium thermoautotrophicum. Blockers bind
Hui Dong et al.
Analytical biochemistry, 480, 67-73 (2015-04-14)
Arsenic is a naturally existing toxin and carcinogen. As(III) S-adenosylmethionine methyltransferases (AS3MT in mammals and ArsM in microbes) methylate As(III) three times in consecutive steps and play a central role in arsenic metabolism from bacteria to humans. Current assays for
Byul G Kim et al.
Biochemistry, 54(22), 3420-3430 (2015-05-20)
In an atmosphere of potassium ions, a modified c-MYC NHE III1 sequence with two G-to-T mutations (MYC22-G14T/G23T) forms a highly stable parallel-stranded G-quadruplex. The G-quadruplex exhibits a steady increase in its melting temperature, T(M), with an increase in the concentration
Hiroyuki Nakao et al.
Biochimica et biophysica acta, 1848(1 Pt A), 145-150 (2014-10-15)
KcsA is a pH-dependent potassium channel that is activated at acidic pH. The channel undergoes global conformational changes upon activation. We hypothesized that the open-close conformational changes of the transmem brane region could promote the flip-flop of phosphoiipids. Based on
R Bryan Sears et al.
Journal of inorganic biochemistry, 121, 77-87 (2013-01-29)
The complex cis-[Ru(phpy)(phen)(CH3CN)2](+) (phpy=2-phenylpyridine, phen=1,10-phenanthroline) was investigated as a potential photodynamic therapy (PDT) agent. This complex presents desirable photochemical characteristics including a low energy absorption tail extending into the PDT window (600-850nm) and photoinduced exchange of the CH3CN ligands, generating
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