Proceedings / Indian Academy of Sciences
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Volume regulation in tetraphyllidean larvae
Tập 57 Số 2 - Trang 117-123 - 1963
The tetraphyllidean larvae increased in volume, when transferred to dilute sea-water. However there is a decrease in volume in 50% sea-water. The conductivity of the medium shows a slight decrease both in 50% and 25% sea-water, indicating the uptake of salts from the external medium. In 10% sea-water the conductivity of the medium goes up steadily.
Isolation and identification of capsaicin and allied compound in chilli
Tập 77 Số 5 - Trang 196-201 - 1973
The isolation and identification of capsaicin from fruits yielded two substances. The white crystalline compound, which, after U.V. and I.R. examination, exhibited the maximum absorption at 206 mµ and the characteristics of long chain-n-alkyl, adjacent to a carboxyl group, was identified as palmatic acid. The molecular formula was, later on, confirmed to C19H38O2. The second, which was oily in nat...... hiện toàn bộ
Genetic analysis of chemosensory pathway
Tập 87 Số 7 - Trang 147-160 - 1978
Some olfactory and gustatory mutants ofDrosophila melanogaster are described. Theolf mutants are insensitive to the repellent, benzaldehyde or the attractant ethyl acetate or simultaneously to both. Thegust mutants are unable to taste quinine or NaCl or sucrose. Electrophysiological tests show that one of the sugar non-tasters has an altered primary chemoreceptor response to sucrose.
Putagraivam, a new genus of the hyphomycetes
Tập 87 Số 5 - Trang 99-104 - 1978
A synnematous hyphomycetePutagraivam sundaram gen. et sp. nov. collected on dead twigs ofMacaranga indica Wight from India is described and illustrated. It is the conidial state of a hypocreaceous fungus.
Salicylaldoxime: An old ligand with new faces
Tập 111 Số 3 - Trang 397-411 - 1999
The paper is concerned with the interactions of salicylaldoxime with trivalent transition metal ions to yield di-, tri-, tetra- and hexanuclear complexes together with their low-lying electronic structures. Tri- and tetranuclear complexes are found to exhibit spin frustration. The importance of isostructural series of compounds with varyingd n electron configurations is indicated. Relevance of som...... hiện toàn bộ
Studies on the chemistry of copper(I) with arylazoimidazoles
Tập 110 Số 5 - Trang 445-451 - 1998
N(1)-alkyl-2-(arylazo)imidazoles (RC6H4N=NC3H2N N(1)X; X=Me (a), Et (b); R=7-Me(L1), 7-OMe(L2), 7-Cl(L3), 7-NO2(L4) and 8-Me(L5)) yield perchlorate salts ofbis-chelated complexes with copper(I). The complexes are 1:1 electrolyte and the composition in supported by Jobs method of continuous variation. The N=N stretching is red shifted by 60–70 cm−1 compared to free ligand values suggesting efficien...... hiện toàn bộ
Observations on the swarming habits and lunar periodicity ofPlatynereis sp. from the Madras Harbour
Tập 5 Số 6 - Trang 245-260 - 1937
Heteronereids ofPlatynereis sp. swarm in the Madras Harbour during the new moon in the months of March, June and September. An interval of three lunar months is observed between successive swarms. Swarming takes place in the night, between 7 and 10p.m. corresponding to the period of maximum high tide; it may occur on the new moon night as well as on one night previous or after. The Heteronereids a...... hiện toàn bộ
On the root rot ofKochia indica wight
Tập 51 Số 3 - Trang 150-156 - 1960
The paper deals with the root-rot ofKochia indica Wight caused byRhizoctonia solani Kuhn which secures successful infection through the root of the host. The disease is described for the first time. The external and internal symptomatology of the diseased plants has been described. The distribution of the fungus in different parts of the host has been studied in detail. In the seedling stage of th...... hiện toàn bộ
Interfacial electron transfer from nonstoichiometric cadmium sulfide nanoparticles to free and complexed copper(II) ions in 2-propanol
Tập 110 Số 3 - Trang 277-295 - 1998
The interactions of free and complexed copper ions (Cu(ClO4)2, Cu(acac)2, and CuTPP) with the surface of nonstoichiometric CdS nanoparticles were monitored by EPR spectroscopy, recombination luminescence quenching and UV/VIS absorption spectroscopy. It was found that formation of a surface S-Cu bond takes place both in the case of Cu(ClO4)2 (free Cu2+ ions) and Cu(acac)2. This process is accompani...... hiện toàn bộ
tetrastichus Sokolowskii Kurdj (family eulophidæ)—A larval parasite ofPlutella maculipennis in South India
Tập 9 Số 2 - Trang 87-98 - 1939
Tetrastichus sokolowskii is a parasite ofPlutella maculipennis. The wasp lays eggs inside the caterpillar which pupates the next day. The maximum number of eggs laid by a female was 127, the maximum number of parasites emerging from a single pupa was 25. Cases of parthenogenesis have been met with. The life-cycle of the parasite varied from 10–15 days. The maximum longevity was 34 days in the case...... hiện toàn bộ