The dual template synthesis of zeolite SSZ-13 by use of trimethyl-adamantanammonium hydroxide and a diquaternary-ammonium mesoporogen induces considerable mesoporosity without impeding zeolite microporosity. The strongly improved accessibility of Brønsted sites in mesoporous SSZ-13 increases its stability during application as an acid catalyst in the methanol-to-olefins reaction.

The methods commonly used for precipitating aluminum by 8-hydroxyquinoline from an acetic-acid solution, buffered with ammonium acetate, do not sufficiently define the conditions requisite for complete precipitation. The present article describes a method in which aluminum is precipitated as the oxyquinolate from a solution which has been partially neutralized with ammonium hydroxide, using bro...

A sensitive method based on high-performance liquid chromatography-tandem mass spectrometry (LC-MS/MS) has been developed for the simultaneous determination of folic acid (FA) and its active metabolite, 5-methyltetrahydrofolic acid (5-M-THF), in human plasma. The analytes were extracted from plasma with methanol solution containing 10 mg/mL of 2-mercaptoethanol and 0.025% (v/v) ammonium hydroxi...

The title compound, NH(4) (+)·C(2)H(8)NO(6)P(2) (-)·2H(2)O, was obtained by the reaction between 1-amino-ethane-1,1-diyldiphospho-nic acid and ammonium hydroxide (1:1) in an aqueous solution. The asymmetric unit contains one anion with two H atoms transferred from the phospho-nic acid groups to the amino group of the anion and to an ammonia mol-ecule, giving an ammonium cation. The structure di...

The reaction of 3-aminopropylamide of cholic acid with CS₂ produced a bile acid derivative of dithiocarbamic acid which further formed an ammonium salt with another molecule of 3-aminopropylamide of cholic acid. The cationic 3-ammonium propylamide of cholic acid did not react further with CS₂ and the formed salt was stable in the reaction mixture, even when excess CS₂ was used. When the reactio...

In this department, haemoglobinometry has been routinely carried out for more than six years on an AutoAnalyzer. The original oxyhaemoglobin method was described in this journal (Nelson and Lamont, 1961). The possibility of adapting this analytical technique to the estimation of haemoglobin by the more stable cyanmethaemoglobin method was tested by us and reported to be satisfactory at the Symp...

Introduction A comprehensive review of gas-chromatographic methods for determining the concentration of circulating antiepileptic drug has been presented (1 ). Because most epileptic patients receive one or more drugs to control their seizures, it is therapeutically desirable to have a method for monitoring the concentrations of each of these drugs in serum. The chemistry of pyrolysis with meth...

In the asymmetric unit of title coordination polymer, {(C(16)H(36)N)[Zn(3)(C(9)H(3)O(6))(2)(OH)]·0.25H(2)O}(n), there are three independent Zn(2+) cations, two benzene-1,3,5-tricarboxyl-ate ligands and a μ(3)-bridging hydroxide group, together with a tetra-n-butyl-ammonium counter-cation and a partially occupied water molecule of solvation (occupancy 0.25). Each Zn ion is coordinated by three c...

Atomic layer deposition (ALD) provides a unique opportunity to integrate high-quality gate dielectrics on III–V compound semiconductors. The physics and chemistry of a III–V compound semiconductor surface or interface are problems so complex that even after three decades research understanding is still limited. We report a simplified surface preparation process using ammonium hydroxide (NH4OH) ...

Abstract Magnetic Fe 3 O 4 nanoparticles (NPs) were successfully synthesized via co-precipitation method using ferric chloride and ferrous sulphate as the starting materials. The shape size of NPs controlled by different types additive including ammonium hydroxide sodium hydroxide. results revealed that adding hydroxide, particles attained a spherical with uniform size. On other hand, turned fr...