Authors:Qasimullah, Ali Mohammad, and Rizwana Mobin
The works reported in the literature (1994–2015) on the use of surfactants as separation modifiers of organic and inorganic compounds by thin-layer chromatography (TLC) is discussed. A number of adsorbents such as silica gel (plain and modified with surfactants and other compounds), stannous silicate, aminoplast, soil, urea-formaldehyde polymer with cellulose binder, and bismuth silicate have been used as layer materials. Surfactants used for the modification of the mobile and stationary phases in TLC have opened new opportunities for realizing novel separations of analytical importance. The salient features of TLC systems used in the analysis of organic and inorganic mixtures of substances have been provided in the tabular form.
Authors:Mohd Abu Bakar, Zoltan Nagy, and Christopher Rielly
extensively reviewed in the literature [ 8 – 12 ]. One of the most widely used thermal analysis techniques for the investigation of polymorphism is differential scanning calorimetry (DSC). The technique basically involves the application of a heating
Authors:Barbara Pacewska, Iwona Wilińska, and Mariola Nowacka
way the formation of C 2 AH 8 and subsequently its conversion to C 3 AH 6 are avoided. However, in literature reports one may find that some researchers do not agree whether the total prevention of conversion in this way is possible. Mechanism of
Authors:Giovanni Di Nicola, Caterina Brandoni, Cristiano Di Nicola, and Giuliano Giuliani
already available triple point literature data for two inorganic compounds (carbon dioxide and nitrous oxide) and dimethyl ether were compared with the ones measured by the present setup, both by using a thermoresistor and the thermocouples.
Authors:V. A. Drebushchak, S. N. Dementiev, and Yu. V. Seryotkin
Comparison with literature data
To clarify the reason of the contradiction between our results and those by [ 11 ], it is necessary to compare how the experiments differ from one another in the both works.
The samples are Ca 3.16 Na 1.81 K
Authors:Hsiao-Fang Lee, Benedict Samuel, and M. Haque
conductivity render it length-scale independent, there is growing evidence in the literature that the opposite is true [ 3 , 4 ] at length scales comparable to the electron and phonon mean free path. Since bulk values can be extrapolated at the smaller scales
Authors:G. Giannini, F. Cuppo, L. Fontanive, N. D'Amelio, A. Cesàro, A. Maiocchi, and F. Uggeri
). Note the structural differences in the three hydrophylic side arms
Despite the large use in the clinical practice and the great interest from the molecular viewpoint of these molecules, literature studies on the
Authors:Xue-Wei Han, Cai-Rong Zhou, and Xiao-Hua Shi
which is used as the standard substance, and Q v = −26460 J g −1 for benzoic acid in the literature [ 3 , 4 ]. The detailed procedure is described as following: (i) Weigh the benzoic acid about 1 g, press the powder into tablet, make it touch with
Authors:O. Ordzhonikidze, A. Pivkina, Yu. Frolov, N. Muravyev, and K. Monogarov
results are used to develop the global kinetic models of decomposition for both simple matters and energetic condensed systems (ECSs) on basis of them. According to literature data, an experimentally determined value of the activation energy E a of