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Abstract  

A scientometric study of communication and growth of a new development of physics, resonance ionization spectroscopy, has been made. Formal (journal publications) and informal (talks, lecures) communication patterns have been studied. Self citation dominates in early publications, but drops off as the field expands. Informal communication leads formal only by about a year in time, but is much larger in number.

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Abstract  

An automatic measurement and data handling system for activation analysis is described. The system comprises five automatic -spectrometers with sample changers, a central computer with four workstations and two communication networks, one to connect the gamma-spectrometers with the central computer and another to provide communication from the workstations to the central computer. The software comprises programs for control of the -spectrometers, communication between the different units, data handling and storage, interpretation of -spectra, calculation of element concentrations and creating reports.

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Summary

A novel chromogenic reagent was developed for the identification and detection of organophosphorus herbicide. The organophosphorus herbicide glyphosate is abundantly used, despite being highly toxic to human beings. In the presented communication, we have developed a simple identification and detection technique for the identification of organophosphorus herbicides with the help of thin-layer chromatography. By using this technique, we can easily identify the presence of organophosphorus poisoning by the use of cobalt thiocyanate. By using the cobalt thiocyanate reagent, we can easily identify color change by high-performance thin-layer chromatography (HPTLC). We developed a simple HPTLC method for testing forensic samples. The results obtained are highly useful in the field of organic qualitative analysis, chemistry, forensic science, and toxicology.

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Abstract  

Balanced disproportionation equations indicate phenomena not predicted by the traditional, two-reaction-product equations. This communication illustrates unanticipated maxima in oxidation state distributions and suggests that they might be useful for characterizing alpha coefficients in aqueous solutions.

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Bottle gourd (Lagenaria siceraria (Molina) Standl.) is an important vegetable cucurbit cultivated in the warmer parts of the world. Forms bearing nonbitter fruits are used as vegetables, while those with bitter fruits are used in the Indian Traditional System of Medicine. The presence of cucurbitacins is probably the only distinguishing feature between the two forms. The present communication describes the development and validation of a high-performance thin-layer chromatographic (HPTLC)–densitometric method for the estimation of cucurbitacin B in bottle gourd using the International Conference on Harmonization (ICH) guidelines. The complete methanol extracts obtained by accelerated solvent extraction (ASE) were resolved in the mobile phase chloroform– methanol (9.5:0.5, v/v), wherein cucurbitacin B was resolved at R F 0.67 ± 0.02. Linear relationship was obtained between the values 200 and 1200 ng per spot (r = 0.9909). The limit of detection and limit of quantification were 40 and 200 ng per spot, respectively. The recovery of compound varied between 94 and 96%. Using the developed HPTLC method, the cucurbitacin B content in the vegetative parts (VP) and fruits (F) of the bitter form was found to be 0.017% and 0.062%, respectively, while it was not detected in the nonbitter form. The application of the method to study the accumulation of cucurbitacin B during progressive developmental stages of fruits of both forms revealed an increasing content of cucurbitacin B from 0.001 to 0.085% during the fruit development in the bitter form. In investigations of market samples, cucurbitacin B was detected in two out of six samples indicating admixture of bitter and nonbitter forms. To the best of our knowledge, this study is the first report of the evaluation of bitter and nonbitter forms of bottle gourd for cucurbitacin B using HPTLC. The developed method may be applicable in the routine quality control of marketed products and formulations of bottle gourd.

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Abstract  

Recently, Órfão obtained two simple equations for the estimation of the relative error in the activation energy calculated by the integral methods [2]. In this short communication, the validity of the equations has been evaluated by comparing the results calculated by the equations with the results calculated by the equation from theoretical derivation without introducing any assumption.

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Abstract  

Temperature oscillation has been used in various applications of thermal analysis, such as relaxation, non-stoichiometry and chemical reactions. However, there are common essential points in these applications, and these are discussed in this short communication for further understanding significance of the temperature oscillation in thermal analysis.

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Authors: Hans Griesinger, Rosmarie Süβ, Jenny Leopold, Michael Schulz and Jürgen Schiller

communication. [8] B.J. Sjursnes , L. Kvittingen , R. Schmid , J. Planar Chromatogr. 29 ( 2016 ) 480 – 483 . [9

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Abstract  

This communication demonstrates that, by simply minotiring the evaporation of water molecules included in β-cyclodextrin cavity, complexation of β-cyclodextrin with steroid in solid state can be studied. The reported method is simple, rapid and novel.

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Abstract  

The methods of thermal analysis are used in many ways in academic research institutions and in industry. The exchange of information leads to an activation of such studies. However, the differences in problems, methods and requirements result in communication problems between the users in the above groups. This may lead to regrettable deficits. Two industrial examples demonstrate that thermoanalytical investigations give useful problem solutions, though they do not meet the requirements of academic research.

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