Experiments On The Suitability Of Cockroaches As Intermediate Hosts For Hymenolepis Diminuta

The suitability of cockroaches serving as intermediate hosts of hymenolepis diminuta has been the concern of scientists for many years. More and more interest in this problem has been evidenced in recent years possibility because of the close proximity of man and the cockroach, and the increased incidence of infections of humans with this tapeworm. Cockroaches are cosmopolitan in their distribution. Some species of cockroaches are primarily house dwellers and are in close with the environment of man. Two species very common to this county which live in human surroundings are the large dark brown cockroach, periplaneta americana, and the small croton bug, blattella germanica, which seem very well adapted to living in the homes of humans. Cockroaches are considered to be a menace to the health of humans wherever they are found, this is probably because of their feeding habits as well as their ability to survive and reproduce large numbers of offspring in both cold and hot climates. They thrive on the same foods that nan uses and not infrequently* the feces of animals if other food sources are not available

Accelerated recovery of postischemic stunned myocardium after induced expression of myocardial heat-shock protein (HSP70)

AbstractIn vitro studies suggest that interventions targeted at myocardial gene regulation of endogenous cytoprotective elements, such as heat-shock protein, may attenuate myocardial ischemic injury. We tested the hypothesis that heat shock-induced expression of myocardial heat-shock protein before ischemia accelerates functional recovery of postischemic stunned myocardium in the intact circulation. Sixteen dogs underwent partial femoral arteriovenous bypass and core temperature was raised to 42° C for 15 minutes in eight dogs (heat-shocked) and maintained at 37° C in eight dogs (nonheat-shocked). After 24 hours dogs were studied to measure myocardial segment length in the circumflex artery region with ultrasonic dimension transducers, left ventricular pressure with a micromanometer, and circumflex coronary flow with an ultrasonic probe. Regional contractile function was quantified by the area beneath the linear preload recruitable stroke work relationship at baseline and at intervals during reperfusion after a 15-minute circumflex artery occlusion followed by 3 hours of reperfusion. Baseline and peak reperfusion hyperemic circumflex flows were 37 ± 9 ml/min and 154 ± 33 ml/min, respectively, in heat-shocked dogs (p < 0.001) and 46 ± 24 ml/min and 171 ± 57 ml/min, respectively, in nonheat-shocked dogs (p < 0.001), with no differences between groups (p = not significant) at any time during reperfusion. Heart rate and left ventricular peak pressure, end-diastolic pressure, and first derivative of left ventricular pressure were similar (all p = not significant) in heat-shocked and nonheat-shocked dogs during ischemia and reperfusion. Before ischemia, preload recruitable stroke work relationship did not differ (p = not significant) in heat-shocked and nonheat-shocked dogs. Ischemia reduced preload recruitable stroke work relationship to 32% ± 8% control (p < 0.001) in heat-shocked dogs and to 19% ± 15% control in nonheat-shocked dogs (p < 0.001) at 15 minutes of reperfusion, indicating a similar (p = not significant) initial degree of injury. During 3 hours of reperfusion, preload recruitable stroke work relationship returned to 80% ± 38% control in heat-shocked dogs but to only 33% ± 13% control in nonheat-shocked dogs (p < 0.0001). Myocardial expression of heat-shock protein, quantified by optical densitometry of Western blots using an antibody specific for HSP70, was greater in heat-shocked than in nonheat-shocked dogs (108 ± 27 versus 71 ± 14 densitometry units, p < 0.005). Exact causal mechanisms remain to be defined, but these data indicate (1) hyperthermic bypass triggers induction of myocardial heat-shock protein and (2) elevated myocardial heat-shock protein is associated with accelerated recovery of stunned myocardium. Promotion of endogenous molecular cytoprotective systems represents a novel and potentially useful strategy for myocardial protection. (J THORAC CARDIOVASC SURG 1995;109:753-64

Antitrust: Will it Change the Lives of Telecommunications Executives?

Good afternoon. This is the last panel of the afternoon. I would like to introduce myself. I\u27m Deborah Ellenberg, one of the hearing examiners at the State Corporation Commission, and I might add, who has a heightened appreciation for the Virginia Commission\u27s wise decision to handle those arbitrations. I am sure on behalf of Howard, Glenn and myself, we thank you for that decision

Save that lamb

1 online resource (PDF, 16 pages)This archival publication may not reflect current scientific knowledge or recommendations. Current information available from the University of Minnesota Extension: https://www.extension.umn.edu

The use of three-dimensional conjugate CFD to enhance understanding of, and to verify, multi-modal heat transfer in dynamic laboratory test walls

This work describes the use of conjugate computational fluid dynamics (C-CFD) to simulate controlled laboratory based dynamic heat transfer tests on building components. This study proposes that conjugate CFD simulation can be used to evaluate the influence of combined convective and conductive heat transfer in multi-state building components. To this end, a solid wall and cavity wall were tested with a Calibrated Hotbox and subject to variable temperature conditions leading to combined convective and conductive heat transfer. The varying temperature of the heat source was monitored and used as the input boundary condition in the simulation model, which included a computational domain which encompassed the hot-side air chamber and the wall, including cavity when applicable. It was found acceptable accuracy could be realized with a simplified constant surface heat transfer coefficient with fixed air temperature on the cold air side, which greatly reduced computational effort. The experimental results revealed that the cavity wall experienced a phase lag, peak displacement of 2.9 times higher and decrement factor 1.6 times lower compared with that of the solid wall

ENV-639: IMPACT OF VEGETATION TYPE AND CLIMATE ON EVAPOTRANSPIRATION FROM EXTENSIVE GREEN ROOFS

Stormwater management solutions are needed to increase resiliency within urban areas by: (1) maintaining the natural hydrologic cycle, (2) controlling erosion and flooding, and (3) protecting water quality (MOE, 2003). Large impervious areas from urban development results in the loss of vegetated surfaces which leads to an increase in direct runoff (e.g. Paul and Meyer, 2008). Within urban areas, conventional roofs cover 40-50% of the impervious surfaces giving them significant potential to host urban stormwater management solutions (Dunnett and Kingsbury, 2004). Green roofs are able to restore the altered hydrologic cycle closer to its natural state by reducing the volume of runoff from a roof as well as attenuating flowrates. The hydrologic benefits of green roofs are partially attributed due to the vegetated surfaces enhancing evapotranspiration (ET) in urban areas. Predicting ET from green roofs is critical to inform green roof design and for optimization of hydrologic performance. This study focuses on evaluating the influence of green roof design parameters, such as vegetation type and growth media depth, on ET and by extension the hydrologic performance of an extensive green roof. While many studies have now demonstrated the effectiveness of green roofs in attenuating flowrate and reducing the volume of stormwater runoff (e.g., VanWoert et al., 2005a, Fassman-Beck et al., 2013, Berndtsson, 2010), little field research has been completed on directly quantifying ET rates and the hydrologic benefits green roofs in Canada including the influence of different vegetation types. The lack of available data on ET rates from green roofs limits optimal green roof design under the Canadian climate

Modulation of renal oxygenation and perfusion in rat kidney monitored by quantitative diffusion and blood oxygen level dependent magnetic resonance imaging on a clinical 1.5T platform

ARRIVE Checklist. (DOCX 42 kb

Femtosecond x-ray diffraction from an aerosolized beam of protein nanocrystals

We demonstrate near-atomic-resolution Bragg diffraction from aerosolized single granulovirus crystals using an x-ray free-electron laser. The form of the aerosol injector is nearly identical to conventional liquid-microjet nozzles, but the x-ray-scattering background is reduced by several orders of magnitude by the use of helium carrier gas rather than liquid. This approach provides a route to study the weak diffuse or lattice-transform signal arising from small crystals. The high speed of the particles is particularly well suited to upcoming MHz-repetition-rate x-ray free-electron lasers