Showing papers by "Zhi-Cheng Tan published in 2002"
TL;DR: In this paper, the heat capacities of p-chlorobenzoic acid were measured in the temperature range from 80 to 580 K by means of an automatic adiabatic calorimeter equipped with a small sample cell of internal volume.
81 citations
TL;DR: In this paper, the molar excess heat capacity of HOCH 2 CH 2 OH has been measured in the temperature range from 273.15 K to 373.15K at 5 K intervals.
35 citations
TL;DR: In this paper, the heat capacity of a polyimide BPADA-m-PDA sample, prepared by polycondensation or step-growth polymerization method, is reported for the temperature range between 80 and 380 K.
18 citations
TL;DR: In this article, a polyimide BTDA-ODA sample was prepared by polycondensation or step-growth polymerization method and its low temperature heat capacities were measured by an adiabatic calorimeter in the temperature range between 80 and 400 K. No thermal anomaly was found in this temperature range.
Abstract: Polyimide BTDA-ODA sample was prepared by polycondensation or step-growth polymerization method. Its low temperature heat capacities were measured by an adiabatic calorimeter in the temperature range between 80 and 400 K. No thermal anomaly was found in this temperature range. A DSC experiment was conducted in the temperature region from 373 to 673 K. There was not phase change or decomposition phenomena in this temperature range. However two glass transitions were found at 420.16 and 564.38 K. Corresponding heat capacity increments were 0.068 and 0.824 J g−1 K−1, respectively. To study the decomposition characteristics of BTDA-ODA, a TG experiment was carried out and it was found that this polyimide started to decompose at ca 673 K.
8 citations
TL;DR: In this article, the authors measured the heat capacity of nanocrystalline nickel (nc-Ni, 40 mn crystallite size) over the temperature range of 78-370 K with a high-resolution automated adiabatic calorimeter.
8 citations
TL;DR: In this paper, a high-precision adiabatic calorimeter over the temperature range from 80 to 370 K was used to measure the low-temperature heat capacities of the two complexes.
5 citations
TL;DR: In this article, the melting point, molar enthalpy and entropy of rare-earth compound with alanine, [Y 2 (Ala) 4 (H 2 O) 8 ](C 1O 4 ) 6 were measured with a small sample high-precision automated adiabatic calorimeter over the temperature range from 78 to 400 K.
3 citations
TL;DR: In this article, the power-time curves of growth of three strains of petroleum bacteria at different NaCl concentrations at 40.0, 40.5 and 50.0°C have been determined by using a 2277 Thermometric Thermal Activity Analyser.
2 citations
TL;DR: The poly(vinyl chloride) (PVC) membrane electrode was used for determining gemfibrozil in pharmaceutical preparations with satisfactory results and was not affected by pH in the range 10.0-12.3.
Abstract: In this paper, a poly(vinyl chloride) (PVC) membrane electrode is prepared for gemfibrozil, 2, 2-dimethyl-5-(2,5-xylyloxy) valeric acid, based on its ion pair complexes with hexadecyltrioctyl ammonium iodide (HTOA). The membrane composition of the electrode was optimized by using the sequential level elimination method for orthogonal experimental design. The electrode has a Nernstian response range from 2.5 x 10(-5) to 0.1 mol/l with an average slope of 55.3 mV/decade. The limit of detection is 7.1 x 10(-6) mol/l. The electrode responses were not affected by pH in the range 10.0-12.3. A Na2B4O7-Na2CO3 buffer of pH = 11.0 was selected as the background electrolyte solution for potentiometric measurements. The electrode was used for determining gemfibrozil in pharmaceutical preparations with satisfactory results.
2 citations