Effects of Cutting Time and Varieties on Fodder Grain Yields and Yield Components of Sorghum under Semi Arid Environments of Makueni County in Kenya

Field trials were conducted at the Kenya Agricultural and Livestock Research Organization (KALRO), Kiboko, Kenya during season 1 (Octobe

Search for extraterrestrial antineutrino sources with the KamLAND detector

We present the results of a search for extraterrestrial electron antineutrinos ($\bar{\nu}_{e}$'s) in the energy range $8.3 MeV < E_{\bar{\nu}_{e}} < 31.8 MeV$ using the KamLAND detector. In an exposure of 4.53 kton-year, we identify 25 candidate events. All of the candidate events can be attributed to background, most importantly neutral current atmospheric neutrino interactions, setting an upper limit on the probability of $^{8}$B solar $\nu_{e}$'s converting into $\bar{\nu}_{e}$'s at $5.3 \times 10^{-5}$ (90% C.L.), if we assume an undistorted $\bar{\nu}_{e}$ shape. This limit corresponds to a solar $\bar{\nu}_{e}$ flux of $93 cm^{-2} s^{-1}$ or an event rate of $1.6 events (kton-year)^{-1}$ above the energy threshold $(E_{\bar{\nu}_{e}} > 8.3 MeV)$. The present data also allows us to set more stringent limits on the diffuse supernova neutrino flux and on the annihilation rates for light dark matter particles.Comment: 22 pages, 6 figure

Measurement of the 8B Solar Neutrino Flux with the KamLAND Liquid Scintillator Detector

We report a measurement of the neutrino-electron elastic scattering rate from 8B solar neutrinos based on a 123 kton-day exposure of KamLAND. The background-subtracted electron recoil rate, above a 5.5 MeV analysis threshold is 1.49+/-0.14(stat)+/-0.17(syst) events per kton-day. Interpreted as due to a pure electron flavor flux with a 8B neutrino spectrum, this corresponds to a spectrum integrated flux of 2.77+/-0.26(stat)+/-0.32(syst) x 10^6 cm^-2s^-1. The analysis threshold is driven by 208Tl present in the liquid scintillator, and the main source of systematic uncertainty is due to background from cosmogenic 11Be. The measured rate is consistent with existing measurements and with Standard Solar Model predictions which include matter enhanced neutrino oscillation.Comment: 6 pages, 3 figure

HealthMpowerment.org: Feasibility and acceptability of delivering an Internet intervention to young Black men who have sex with men

Young Black men who have sex with men (BMSM) are disproportionately affected by HIV/AIDS in the United States and continue to experience rapidly increasing HIV incidence. We designed a tailored, theory-based interactive HIV/STI prevention website for young BMSM, called HealthMpowerment.org (HMP) and conducted a small pilot trial comparing HMP to currently available HIV/STI websites. We present findings demonstrating feasibility and acceptability of delivering the intervention to the target population of young BMSM. Retention rates were 90% and 78% at one and three month follow-ups, respectively. Evaluation immediately after the intervention’s completion revealed that participants who used the HMP website reported high levels of user satisfaction and interest and low levels of website difficulty and frustration. At the end of the intervention, there was a trend in increased behavioral intentions to use condoms and engage in preparatory condom use behaviors in the intervention group compared to the control group (p=.10). We observed a reduction in mean scores on the CES-D scale among those in the intervention group that was not seen in the control group at the one-month follow-up, though this was not statistically significant. Feedback from exit interviews with study participants suggested that HMP is relevant to the prevention needs of young BMSM. Overall, the findings support the acceptability and feasibility of delivering this prevention program to a group that has few interventions despite bearing a significant burden of the epidemic. Future trials, combining internet and mobile phone technologies, are planned to test HMP among larger and more diverse populations of young BMSM

Indication for the disappearance of reactor electron antineutrinos in the Double Chooz experiment

The Double Chooz Experiment presents an indication of reactor electron antineutrino disappearance consistent with neutrino oscillations. A ratio of 0.944 $\pm$ 0.016 (stat) $\pm$ 0.040 (syst) observed to predicted events was obtained in 101 days of running at the Chooz Nuclear Power Plant in France, with two 4.25 GW$_{th}$ reactors. The results were obtained from a single 10 m$^3$ fiducial volume detector located 1050 m from the two reactor cores. The reactor antineutrino flux prediction used the Bugey4 measurement as an anchor point. The deficit can be interpreted as an indication of a non-zero value of the still unmeasured neutrino mixing parameter \sang. Analyzing both the rate of the prompt positrons and their energy spectrum we find \sang = 0.086 $\pm$ 0.041 (stat) $\pm$ 0.030 (syst), or, at 90% CL, 0.015 $<$ \sang $\ <$ 0.16.Comment: 7 pages, 4 figures, (new version after PRL referee's comments

Production of Radioactive Isotopes through Cosmic Muon Spallation in KamLAND

Radioactive isotopes produced through cosmic muon spallation are a background for rare-event detection in $\nu$ detectors, double-$\beta$-decay experiments, and dark-matter searches. Understanding the nature of cosmogenic backgrounds is particularly important for future experiments aiming to determine the pep and CNO solar neutrino fluxes, for which the background is dominated by the spallation production of $^{11}$C. Data from the Kamioka liquid-scintillator antineutrino detector (KamLAND) provides valuable information for better understanding these backgrounds, especially in liquid scintillators, and for checking estimates from current simulations based upon MUSIC, FLUKA, and GEANT4. Using the time correlation between detected muons and neutron captures, the neutron production yield in the KamLAND liquid scintillator is measured to be $(2.8 \pm 0.3) \times 10^{-4} \mu^{-1} g^{-1} cm^{2}$. For other isotopes, the production yield is determined from the observed time correlation related to known isotope lifetimes. We find some yields are inconsistent with extrapolations based on an accelerator muon beam experiment.Comment: 16 pages, 20 figure

Goishi tea consumption inhibits airway hyperresponsiveness in BALB/c mice

<p>Abstract</p> <p>Background</p> <p>Airway hyperresponsiveness (AHR) is one of the important traits that characterize bronchial asthma. Goishi tea is a post-heating fermented tea that has been reported to have higher free radical scavenging activity. In this study, we evaluated the prophylactic effects of Goishi tea on AHR in BALB/c mice.</p> <p>Results</p> <p>The number of inflammatory cells in BAL fluid was considerably reduced in Goishi tea/<it>Der f </it>and Gallic acid/<it>Der f </it>groups as compared with Tap water/<it>Der f </it>group. Regarding inflammatory cells in BAL, a significant reduction of eosinophils and neutrophils was observed in Goishi tea-treated mice (p < 0.01), as well as in the Gallic acid/<it>Der f </it>group (p < 0.05), as compared with Tap water/<it>Der f </it>group. In asthmatic mice (Tap water/<it>Der f </it>group), the intensity of airway resistance increased simultaneously with the increase in acetylcholine concentration in a dose-dependant way. AHR was significantly inhibited in Goishi tea/<it>Der f </it>and Gallic acid/<it>Der f </it>(p < 0.01) groups as compared with the Tap water/<it>Der f </it>group. Regarding serum specific-IgG₁, significantly lower levels of this antibody were observed in Goishi tea/<it>Der f </it>and Gallic acid/<it>Der f </it>groups as compared with the Tap water/<it>Der f </it>group (p < 0.05). In addition, adiponectin level was significantly higher in the Goishi tea group as compared with the Tap water treated mice (p < 0.01).</p> <p>Conclusions</p> <p>The results suggest that Goishi tea consumption exerted an inhibitory effect on eosinophilic and neutrophilic infiltration in the lung, attenuated the increase in airway resistance and increased the production of adiponectin; thus reducing Der f induced allergic inflammatory process in mice.</p