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1.
In the catalytic reaction of an iron(III) porphyrin with t-BuOOH, CumOOH, H2O2 and C6F5IO, cyclohexene was used as a probe substrate. The selective hydroxylation of cyclohexene by hydroperoxides proceeds through radical path and this has been utilized for successful dioxygen activation/autooxidation. For other oxidants epoxide was the major product and the reactions proceed through non-radical path. 相似文献
2.
In manufacturing industries, the quality of a product depends on the combined effect of multiple input variables working singly or together and therefore attention has been given on process capability indices to shift from single to multivariate domain. In case of multivariable domain the capability to incorporate uncertainties at the time of decision making becomes necessary. Fuzzy system is introduced to take care of this requirement. In this article the process parameters of soap manufacturing industries have been analyzed. The process capability is determined using Fuzzy Inference System rule editor based on a set of justified if then statements as applicable for the process. The data has been collected in linguistic form to derive its process capability, using a set of justified rules and the effect of each factor has been determined using Design of Experiments (DoE) and analysis of variance technique (ANOVA) for improving the soap quality from perspective of its softness. This article ventures to propose a new methodology by integrating Fuzzy with DoE providing better result followed by DoE and Fuzzy Inference system in isolation. 相似文献
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S. Mukherjea 《Virtual Reality》1998,3(4):245-258
With the explosive growth of information in the WWW, it is becoming increasingly difficult for the user to find information of interest. Visualisations may be helpful in assisting the users in their information retrieval task. Effective visualisation of the structure of a WWW site is extremely useful for browsing through the site. Visualisation can also be used to augment a WWW search engine when too many or too few results are retrieved. In this paper, we discuss several visualisations we have developed to facilitate information retrieval on the WWW. With VRML becoming the standard for graphics on the Web and efficient VRML browsers becoming available, VRML was used for developing these visualisations. Unique visualisations like focus + context views of WWW nodes and semantic visualisation are presented and examples are given on scenarios where the visualisations are useful. 相似文献
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Analyzing the Structure and Evolution of Massive Telecom Graphs 总被引:2,自引:0,他引:2
Nanavati A.A. Singh R. Chakraborty D. Dasgupta K. Mukherjea S. Das G. Gurumurthy S. Joshi A. 《Knowledge and Data Engineering, IEEE Transactions on》2008,20(5):703-718
With the ever-growing competition in telecommunications markets, operators have to increasingly rely on business intelligence to offer the right incentives to their customers. Existing approaches for telecom business intelligence have almost solely focused on the individual behavior of customers. In this paper, we use the call detail records of a mobile operator to construct call graphs, that is, graphs induced by people calling each other. We determine the structural properties of these graphs and also introduce the Treasure-Hunt model to describe the shape of mobile call graphs. Moreover, we determine how the structure of these call graphs evolve over time. Finally, since short messaging service (SMS) is becoming a preferred mode of communication among many sections of the society, we study the properties of the SMS graph. Our analysis indicates several interesting similarities and differences between the SMS graph and the corresponding call graph. We believe that our analysis techniques can allow telecom operators to better understand the social behavior of their customers and potentially provide major insights for designing effective incentives. 相似文献
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Purification of a cytosolic fatty acid-binding protein (FABP) from developing human placenta has been achieved, and its role
in modulating the inhibition of human placental glucose-6-phosphate dehydrogenase (G6PD) by palmitoyl-CoA (PAL-CoA) has been
studied. FABP was resolved into three peaks, viz. DE-I, DE-II and DE-III, by DEAE cellulose chromatography. DE-I was almost
lipid-free. Presence of endogenous fatty acids in DE-II and DE-III was detected by thin layer chromatography (TLC). Fatty
acids were the only detectable lipid component in these fractions. Gas liquid chromatography (GLC) analysis revealed that
DE-II binds long chain saturated and unsaturated fatty acids nonspecifically, whereas DE-III is mainly an arachidonic acid
carrier. Each of these fractions, viz. DE-I, DE-II and DE-III, has a molecular weight of 14,200 Daltons. Ouchterlony double
immunodiffusion studies have confirmed the immunochemical identity of these three fractions of placental FABP. Separation
in ion exchanger may be due to their different isoelectric points and varied types of binding affinities. Human placental
G6PD was inhibited 50% by 0.03 mM PAL-CoA. The DE-II fraction of FABP enhanced the activity of G6PD in the absence of added
PAL-CoA and protected against PAL-CoA inhibition of the enzyme. Such a modulating effect of FABP in this inhibition is attributable
to binding of long chain acyl-CoA rather than to a direct effect of FABP on the enzyme itself. 相似文献
10.
R. N. Mukherjea K. K. Saha S. K. Sanyal 《Journal of the American Oil Chemists' Society》1978,55(9):653-656
Moisture-cured polyurethane films have been prepared by reaction between toluene diisocyanate and castor oil or derivatives
such as castor oil diethanol amide, castor oil monoglyceride, ethylene glycol monoricinoleate, and propylene glycol monoricinoleate.
Effect of acetylated castor oil as an internal plasticizer on the resulting urethane films has been studied. Catalytic effect
of 3-5% triethanol amine on curing of plasticized films has been noted. Plasticized polyurethane films show good tensile strength
(105-550 kg/cm2) and elongation (15-215%) properties, having high melting point (210-272 C) and good resistance to solvents and chemicals. 相似文献