Supersymmetric Models and CP violation in B decays

In this talk CP violation in the supersymmetric models, and especially in B-decays is discussed. We review our analysis of the supersymmetric contributions to the mixing CP asymmetries of $B\to \phi K_S$ and $B\to \eta^{\prime} K_S$ processes. Both gluino and chargino exchanges are considered in a model independent way by using the mass insertion approximation method. The QCD factorization method is used, and parametrization of this method in terms of Wilson coefficients is presented in both decay modes. Correlations between the CP asymmetries of these processes and the direct CP asymmetry in $b\to s \gamma$ decay are shown.Comment: 16 pages, 7 figures. Prepared for the proceedings of the 1st GUC workshop on High Energy Physics, Cairo, Jan 9-13, 200

Pengaruh Penggilingan Dan Pembakaran Terhadap Kandungan Mineral Dan Sifat Fisik Kulit Pensi (Corbiculla SP) Untuk Pakan

An experiment was conducted to determine the percentage of rate, nutrient contents and physical properties of grinding and roasting products of freshwater mussel shell. Fresh mussel samples were collected from four different lakes in West Sumatra: Maninjau, Singkarak, Danau Diatas and Danau Dibawah. The samples of about 3 kg each were processed to separate the shell and their body content. The shells were then dried and processed to produce three different products: raw coarse ground, raw fine ground and roasted fine ground. Parameters measured included: percent rate of meal, the content of DM, ash, Ca and P, and physical properties (angle of response, bulk and compacted bulk densities and specific density). The results showed that grinding and roasting gave no significant effect on specific density and mineral content of the meal product. The rate of meal product and bulk density decreased, while angle of response and compacted bulk density increased significantly. It was concluded that both roasting and grinding could not improve both nutrient content and physical properties of freshwater mussel shell

Respons Ayam Kampung Terhadap Penambahan Kalsium Asal Siput (Lymnae SP) Dan Kerang (Corbiculla Molktiana) Pada Kondisi Ransum Miskin Fosfor

The objectives of this present investigation were to evaluate effects of using shell of freshwater snail as major source of calcium in the diets on performance and bone mineralization of growing native chicks (1-12 weeks of age). There were four dietary treatments. The first was a basal diet (negative control) containing 0.5 % bone meal, but deficient in phosphor. Three other diets which were relatively the same in composition as that of basal diet, but one supplemented with 2.5 % oyster shell (positive control) and two with 2.5% shell of freshwater snail obtained from two different water bodies: lake and rice field, respectively. One hundred birds of native chicken were divided into four groups of treatments with five replicates with 5 birds each and offered experimental diets for 12 weeks. Parameters measured included: body weight gain, feed intake, feed conversion ratio (FCR), weight of tibia bone and their ash and mineral (Ca and P) composition and retention. The chicks fed on diets containing shell of freshwater snails showed no significantly difference in body weight gain, feed intake and FCR with those fed on diet containing oyster shell, but significantly lower body weight gain than those fed on basal diet containing only bone meal. Feeding of diets supplemented with shell of snails and oyster decreased significantly the body weight gain. However, no significantly difference was observed in the weight and content of ash, Ca and P of tibia bone

Chargino contributions to the CP asymmetry in B -> Phi K(S) decay

We perform a model independent analysis of the chargino contributions to the CP asymmetry in B -> Phi K(S) process. We use the mass insertion approximation method generalized by including the possibility of a light right-stop. We find that the dominant effect is given by the contributions of the mass insertions deltaU_LL(32) and deltaU_RL(32) to the Wilson coefficient of the chromomagnetic operator. By considering both these contributions simultaneously, the CP asymmetry in B -> Phi K(S) process is significantly reduced and negative values, which are within the 1-sigma experimental range and satisfy the b -> s gamma constraints, can be obtained.Comment: 14 pages, LaTeX, 3.eps Figure

SUSY R parity violation and CP asymmetry in semi-leptonic tau-decays

We analyze the CP violation in the semileptonic | \Delta S|=1 tau-decays in supersymmetric extensions of the standard model (SM) with R parity violating term. We show that the CP asymmetry of tau-decay is enhanced significantly and the current experimental limits obtained by CLEO collaborations can be easily accommodated. We argue that observing CP violation in semi leptonic tau-decay would be a clear evidence for R-parity violating SUSY extension of the SM.Comment: 5 pages, 2 figure

Penanganan Pascapanen dan Kualitas Jagung sebagai Bahan Pakan di Kabupaten Pasaman Barat

A rapid survey was carried out to study the quality of corn produced by farmers in relation to post harvest practices in West Pasaman district. Twenty-six corn farmers, which were located in two sub districts of Kinali and Luhak Nan Duo, were selected and interviewed. Data and information collected including: farm size, farming and post harvest practices, quality of product and marketing. During the survey, samples of corn were collected and then analyzed for moisture, protein and crude fiber content, the rate of corn contaminated by fungi and contaminants. The corn contained crude protein and fiber in normal level of 11.8 % and 2,5 %, respectively. The moisture content was however found relatively high of 21.3 % in average and about 34 % of corn contaminated by fungi. Mainly insufficient handling and drying after harvesting caused the poor quality

Spreading depression triggers ictal activity in disinhibited hippocampal slices

Die enge Verwandtschaft zwischen der Spreading depression (SD) und experimenteller epileptischer Aktivität hat zu zahlreichen Untersuchungen zum Wechselspiel dieser zwei Phänomene geführt. Trotz dieser Untersuchungen in verschiedenen Tiermodellen, ist der genaue Zusammenhang zwischen SD und epileptiformer Feldpotentiale unklar. Daher wurde in der vorliegenden Arbeit die Interaktion von SD und experimenteller epileptischer Aktivität in hippocampalen Rattenhirnschnitten untersucht

Altered hippocampal plasticity by prenatal kynurenine administration, kynurenine-3-monoxygenase (KMO) deletion or galantamine

Glutamate receptors sensitive to N-methyl-d-aspartate (NMDA) are involved in embryonic brain development but their activity may be modulated by the kynurenine pathway of tryptophan metabolism which includes an agonist (quinolinic acid) and an antagonist (kynurenic acid) at these receptors. Our previous work has shown that prenatal inhibition of the pathway produces abnormalities of brain development. In the present study kynurenine and probenecid (both 100 mg/kg, doses known to increase kynurenic acid levels in the brain) were administered to female Wistar rats on embryonic days E14, E16 and E18 of gestation and the litter was allowed to develop to post-natal day P60. Western blotting revealed no changes in hippocampal expression of several proteins previously found to be altered by inhibition of the kynurenine pathway including the NMDA receptor subunits GluN1, GluN2A and GluN2B, as well as doublecortin, Proliferating Cell Nuclear Antigen (PCNA), sonic hedgehog and unco-ordinated (unc)-5H1 and 5H3. Mice lacking the enzyme kynurenine-3-monoxygenase (KMO) also showed no changes in hippocampal expression of several of these proteins or the 70-kDa and 100-kDa variants of Disrupted in Schizophrenia-1 (DISC1). Electrical excitability of pyramidal neurons in the CA1 region of hippocampal slices was unchanged, as was paired-pulse facilitation and inhibition. Long-term potentiation was decreased in the kynurenine-treated rats and in the KMO(−/−) mice, but galantamine reversed this effect in the presence of nicotinic receptor antagonists, consistent with evidence that it can potentiate glutamate at NMDA receptors. It is concluded that interference with the kynurenine pathway in utero can have lasting effects on brain function of the offspring, implying that the kynurenine pathway is involved in the regulation of early brain development