1,556 research outputs found

    Acylation and alkylation of 1, 3-dimethoxybenzene in polyphosphoric acid

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    Products of the reaction of 3-halo- and 3-ethoxypropionic acids with 1,3-dimethoxybenzene (4) in polyphosphoric acid have been shown to be 2',4'-dimethoxy-3-(2,4-dimethoxyphenyl)-propiophenone (6) and 1,5-bis[3-(2,4-dimethoxyphenyl)-3-keto-propyl]-2,4-dimethoxybenzene (15) and these have been prepared by unambiguous syntheses. 2',4'-Dimethoxy-3-ethoxypropiophenone (3a) and 2',3,4'- trimethoxypropiophenone (3d) have been synthesized by the reaction of 3-chloro-2',4'-dimethoxypropiophenone (3c) with ethanol and methanol respectively

    Free energy analysis of binary alloys at phase transition

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    Order-disorder transformation in alloys is a fascinating and extensively studied problem for many years. This transformation has been studied widely using the two state Ising model. But vacancies are not considered in two state Ising model, which may play an important rule in determining the composition of stable configuration. So we used three state Ising model which takes vacancies also at lattice sites. To make a realistic study we haveincluded kinetic energy of the particles in the total Hamiltonian

    2, 4-Dimethyl-6-hydroxyacetophenone oxime and 3, 5-dibromo-2, 4-dimethyl-6- hydroxyacetophenone oxime as reagents and diethylamine as a synergist in the extraction and separation of metals

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    1022-10242,4-Dimethyl-6-hydroxyacetophenone oxime and 3,5- dibromo-2,4-dimethyl-6-hydroxyacetophenone oxime act as very good reagents for the extraction and separation of Cu(II), Ni(II), Co(II), Fe(III) and Mn(II). Addition of diethylamine as a synergist in the extraction system, not only increases the per cent extraction of the metals but also the molar absorbances of the complexes. The separation of the metals from one another, viz., Cu(II) from Ni(II), Cu(II) from Co(II) and Cu(II) and Ni(II) from Cr(III) becomes far more easier in the presence of diethylamine

    Resilient and Cybersecure Distributed Control of Inverter-Based Islanded Microgrids

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    Characterization and diversity assessment in coconut collections of Pacific Ocean Islands and Nicobar Islands

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    Characterization and genetic diversity assessment among 30 conserved coconut accessions collected from Pacific Ocean Islands and Nicobar Islands for morphological traits, physico-chemical traits of tender nut water, leaf biochemical parameters and molecular characterization by using random amplified polymorphic DNA (RAPD) markers were undertaken at World Coconut Germplasm Centre, Andaman. Significant variations were observed for most morphological and nut component traits. Out of the 30 accessions characterized, four accessions, namely, Niu Leka, Hari Papua, Niu Oma and Nikkore were dwarfs among which Niu Leka was identified as a unique dwarf with higher copra content. A dendrogram of genetic relationship obtained through RAPD markers showed distinct variation with 66% in all accessions. The average polymorphic information content (PIC) value of 13 selected primers was 0.29 and maximum and minimum PIC values was 0.46 and 0.17 for primers OPF-19 and OPH-25, respectively. Cluster analysis by UPGMA method grouped the accessions into two major clusters. The results will be useful in the selection among these conserved accessions for specific traits for future utilization in crop improvement initiatives based on their performance for different desirable traits and the level of diversity.Key words: Coconut, genetic diversity, characterization, RAPD, cluster analysis
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