Discriminating among Earth composition models using geo-antineutrinos

It has been estimated that the entire Earth generates heat corresponding to about 40 TW (equivalent to 10,000 nuclear power plants) which is considered to originate mainly from the radioactive decay of elements like U, Th and K, deposited in the crust and mantle of the Earth. Radioactivity of these elements produce not only heat but also antineutrinos (called geo-antineutrinos) which can be observed by terrestrial detectors. We investigate the possibility of discriminating among Earth composition models predicting different total radiogenic heat generation, by observing such geo-antineutrinos at Kamioka and Gran Sasso, assuming KamLAND and Borexino (type) detectors, respectively, at these places. By simulating the future geo-antineutrino data as well as reactor antineutrino background contributions, we try to establish to which extent we can discriminate among Earth composition models for given exposures (in units of kt$\cdot$ yr) at these two sites on our planet. We use also information on neutrino mixing parameters coming from solar neutrino data as well as KamLAND reactor antineutrino data, in order to estimate the number of geo-antineutrino induced events.Comment: 24 pages, 10 figures, final version to appear in JHE

Measurement of the mass difference between top quark and antiquark in pp collisions at root s=8 TeV

Peer reviewe

Larval salivary glue protein heterosis and dosage compensation among the interspecific F1 hybrids of Drosophila nasuta nasuta and Drosophila nasuta albomicans

Reciprocal cross effects with respect to larval salivary secretory protein levels were studied in the interspecific fertile reciprocal hybrids by crossing Drosophila nasuta nasuta, and Drosophila nasuta albomicans. These proteins are produced copiously during the third larval instar stage and are believed to play a role in the attachment of pupa to the substratum prior to pupariation as well as in insect immunity. Quantitative variations were encountered among the reciprocal hybrids. Significant heterosis was observed between D. n. nasuta and the F1 hybrid female of a cross between D. n. albomicans female and D. n. nasuta male (21.39%) while the F1 hybrids of a cross between D. n. nasuta female and D. n. albomicans male showed a marginal increase (4.24%) from the mid parent level. The glue secretions were correlated to total cell number but independent of gland size. SDS PAGE revealed a considerable heterosis with respect to X-linked protein fractions. Here we report sex specific biochemical heterosis. However the X-linked fractions undergo dosage compensation in both parents and hybrids indicating strict regulatory control

Regulation and correlation of X chromosomal puff and glue protein synthesis in the larval salivary glands of Drosophila nasuta nasuta

We have attempted to identify the chromosomal region harboring genes encoding major glue fractions by correlating the glue protein synthesis with the puffing pattern of the X-chromosome of Drosophila nasuta nasuta during normal larval development and in the presence of exogenous 20-OH Ecdysone. The division 10 of the X-chromosome was characterized by the presence of a puff right from early third instar which attains its maximum size in the mid third instar stage and remains active till the onset of prepupal stage. The puff was found to regress when larvae/glands were exposed to exogenous 20-OH Ecdysone in vivo or in vitro, suggesting that it is an intermolt puff. Salivary glands treated with 20-OH Ecdysone revealed a significant reduction in the total protein content as well as X-linked glue fractions resolved by SDS–PAGE

Ribbons and groups: A thin rod theory for catheters and filaments

10.1088/0305-4470/32/9/017Journal of Physics A: Mathematical and General3291709-173

Tubes in tubes: Catheter navigation in blood vessels and its applications

International Journal of Solids and Structures37223031-305