Step-Wise Computational Synthesis of Fullerene C60 derivatives. 1.Fluorinated Fullerenes C60F2k

The reactions of fullerene C60 with atomic fluorine have been studied by unrestricted broken spin-symmetry Hartree-Fock (UBS HF) approach implemented in semiempirical codes based on AM1 technique. The calculations were focused on a sequential addition of fluorine atom to the fullerene cage following indication of the cage atom highest chemical susceptibility that is calculated at each step. The effectively-non-paired-electron concept of the fullerene atoms chemical susceptibility lays the foundation of the suggested computational synthesis. The obtained results are analyzed from energetic, symmetry, and the composition abundance viewpoints. A good fitting of the data to experimental findings proves a creative role of the suggested synthesis methodology.Comment: 33 pages, 11 figures, 2 tables, 2 chart

Surface contact studies of Asian cadaveric hips

Journal of Orthopaedic Surgery1161-68JOTS

Effect of diurnal variation of atmospheric and elevated levels of carbon-di-oxide and photosynthetically active radiation on intercellular concentration and rate of photosynthesis in maize and safflower

A field experiment was conducted during rabi 2003 to study the effect of elevated levels of CO2 and PAR on intercellular CO2 concentration (Ci), net photosynthetic rate and their interrelationship in maize and safflower at different growth stages. The highest concentration of intercellular CO2 was recorded at 1200 and 1400 hrs and lowest concentration of intercellular CO2 was found during early hours in the morning (08 00 hours) irrespective of levels of CO2 and PAR at all the stages of maize and sunflower. The higher rate of net photosynthetic rate was observed in active vegetative stage (11.7 to 49.1 μmol CO2 cm-2 sec-1) compared to knee high and flowering stages of maize and during late vegetative stage (21.6 to 47.2 μmol CO2 cm-2 sec-1) in safflower compared to early vegetative and flowering stage. The optimum levels of CO2 and PAR for maize were 650μmol CO2 mol-1 and 960 μmol m -2 s-1 respectively and for safflower were 650μmol CO2 mol-1 and 1100 μmol m-2 s-1 respectively. A combination of 650 μmol CO2 mol-1 and 960 μmol m-2 s-1 of PAR for maize and 650 μmol CO2 mol-1 and 1100 μmol m-2 s-1 of PAR for safflower were found optimum levels. A positive correlation between the intercellular CO2 concentration and net photosynthetic rate in maize and safflower was found throughout the crop growth period

Relationship between sheath blight development and phytotoxin production by Rhizoctonia solani mutants in rice

Mutants of Rhizoctonia solani were developed using UV irradiation of the mycelia of isolate RS7, which is the field isolate causing sheath blight in rice. The mutants showed reduced virulence, as compared to RS7 in detached leaf sheath and intact rice plants. All the mutants produced some toxin but in varied quantities. The amount of toxin produced by the mu­tants was positively correlated with disease development on rice plants and detached leaf sheaths. The wild isolate RS7 and mutant RSU7 pro­duced more quantity of toxic material, which in turn related to severe sheath blight symptoms. Sclerotial production on the infected rice sheath also showed significant variation among the mutants and the virulent and less virulent isolates. SDS-PAGE analysis of the mycelial proteins show­ed many proteins of different molecular weights varying among mutants and wild isolate at different stages of mycelial growth. Correlation bet­ween reduction in toxin production and disease severity is statistically significant