Effectiveness of an acoustic lure for surveying bats in British woodlands

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VECTOR MESON PRODUCTION BY POLARIZED PHOTONS AT 2.8, 4.7 AND 9.3 GeV

We present results on vector meson photoproduction via +yp-. Vp in the LBL-SLAC 82 ” hydrogen bubble chamber exposed to a linearly polarized photon beam at 2.8, 4.7 and 9.3 GeV. We find p ” production to have the characteristics of a diffractive process, i.e., a cross section decreasing slowly with energy and a differential cross section with slope of- 6.5 GeV-2. Within errors the p ” production amplitudes are entirely due to natural parity exchange. S-channel helicity is conserved to a high degree in the y--+p ’ transition. We find evidence for small helicity flip amplitudes for 7rr pairs in the,o ” region. Photoproduction of w mesons is separated into its natural (aN) and unnatural (vu) parity ex-change contributions. The E-Y and t-dependence and the spin density matrix of the unnatural parity exchange contribution are consistent with an OPE process. The natural parity exchange part has characteristics similar to p ” production

TOTAL AND PARTIAL yp CROSS SECTIONS AT 9.3 GeV*

We report yp total, topological, and channel cross sections at 9.3 GeV, from a bubble chamber experiment monoenergetic photon beam. using a nearly * Work supported by the U. S. Atomic Energy Commission and Nationa

Total and partial photoproduction cross sections at 1.44, 2.8, and 4.7 GeV

A nearly monochromatic high-energy photon beam produced by Compton backscattering of ruby laser light has been used to study photoproduction in a hydrogen bubble chamber. The total hadronic γp cross sections at 1.44, 2.8, and 4.7 GeV are found to be 145.1 ± 5.7, 131.3 ± 4.3, and 124.2 ± 3.9 μb, respectively. Partial cross sections are presented also. © 1969 The American Physical Society.SCOPUS: ar.jinfo:eu-repo/semantics/publishe

Sodium arsenite reduces severity of dextran sulfate sodium-induced ulcerative colitis in rats

The histopathological features and the associated clinical findings of ulcerative colitis (UC) are due to persistent inflammatory response in the colon mucosa. Interventions that suppress this response benefit UC patients. We tested whether sodium arsenite (SA) benefits rats with dextran sulfate sodium (DSS)-colitis. The DSS-colitis was induced by 5% DSS in drinking water. SA (10 mg/kg; intraperitoneally) was given 8 h before DSS treatment and then every 48 h for 3 cycles of 7, 14 or 21 d. At the end of each cycle rats were sacrificed and colon sections processed for histological examination. DSS induced diarrhea, loose stools, hemoccult positive stools, gross bleeding, loss of body weight, loss of epithelium, crypt damage, depletion of goblet cells and infiltration of inflammatory cells. The severity of these changes increased in the order of Cycles 1, 2 and 3. Treatment of rats with SA significantly reduced this severity and improved the weight gain

Kinesiological Factors in Vertical Jump Performance: Differences Among Individuals

The purpose of this study was to investigate the kinesiological factors that distinguish good jumpers from poor ones, in an attempt to understand the critical factors in vertical jump performance (VJP). Fifty-two normal, physically active male college students each performed five maximal vertical jumps with arms akimbo. Ground reaction forces and video data were collected during the jumps. Subjects' strength was tested isometrically. Thirty-five potential predictor variables were calculated for statistical modeling by multiple-regression analysis. At the whole-body level of analysis, the best models (which included peak and average mechanical power) accounted for 88% of VJP variation (p < .0005). At the segmental level, the best models accounted for 60% of variation in VJP (p < .0005). Unexpectedly, coordination variables were not related to VJP. These data suggested that VJP was most strongly associated with the mechanical power developed during jump execution.The University of Michigan/[Rackham Predoctoral Fellowship]//Estados UniddosThe University of Michigan/[Rackham Dissertation Grant]//Estados UnidosUCR::Vicerrectoría de Docencia::Ciencias Sociales::Facultad de Educación::Escuela de Educación Físic