Journal of the Pennsylvania Academy of Science最新文献_第8页

DETECTION OF MERCURY IN NATURAL WATERS IN BERKS COUNTY, PENNSYLVANIA, USING COLD VAPOR ATOMIC ABSORPTION SPECTROSCOPY 用冷蒸汽原子吸收光谱法检测宾夕法尼亚州伯克斯县天然水中的汞

Journal of the Pennsylvania Academy of Science Pub Date : 2012-12-01 DOI: 10.5325/jpennacadscie.86.1.0054

Amanda R. McGettigan, Daniel Kwasniewski, R. Chinni

引用次数: 0

LIGHT AND SCANNING ELECTRON MICROSCOPIC OBSERVATIONS OF THE CERCARIAE AND REDIAE OF RIBEIROIA ONDATRAE 棘球绦虫尾蚴和尾蚴的光镜和扫描电镜观察

Journal of the Pennsylvania Academy of Science Pub Date : 2012-12-01 DOI: 10.5325/jpennacadscie.86.1.0030

Shamus P. Keeler, B. Fried, J. Huffman

引用次数: 0

STAPHYLOCOCCUS INTERMEDIUS DERMATITIS IN DENNING NEW JERSEY BLACK BEARS (Ursus americanus) 美国黑熊的中间葡萄球菌皮炎

Journal of the Pennsylvania Academy of Science Pub Date : 2012-12-01 DOI: 10.5325/jpennacadscie.86.1.0075

Shamus P. Keeler, Kelcey I. Burguess, Lemaster Heather, J. Huffman

引用次数: 0

QUANTIFYING WING DAMAGE OF SUMMER BATS IN THE NORTHEASTERN UNITED STATES 量化美国东北部夏季蝙蝠的翅膀损伤

Journal of the Pennsylvania Academy of Science Pub Date : 2012-12-01 DOI: 10.5325/jpennacadscie.86.1.0041

K. Francl, Tessa K. Canniff, Bland R. CRAIG, D. Sparks, V. Brack

{"title":"QUANTIFYING WING DAMAGE OF SUMMER BATS IN THE NORTHEASTERN UNITED STATES","authors":"K. Francl, Tessa K. Canniff, Bland R. CRAIG, D. Sparks, V. Brack","doi":"10.5325/jpennacadscie.86.1.0041","DOIUrl":"https://doi.org/10.5325/jpennacadscie.86.1.0041","url":null,"abstract":"\u0000 While conducting mist net surveys for the federally endangered Indiana bat (Myotis sodalis) in West Virginia, New York, and Pennsylvania, we quantified wing damage on 422 bats of four species: big brown (Eptesicus fuscus, N = 190), eastern red (Lasiurus borealis, N = 82), little brown (M. lucifugus, N = 55), and northern myotis (M. septentrionalis, N = 95) bats. From 15 May – 15 August 2010, we photographed back-lit wings to reveal damage such as scars, holes, and blotching (non-uniform pigmentation). After quantifying the percent cover of these damage types using image-analysis software, we used generalized non-linear mixed models to determine if percent area of damage differed among scores associated with the categorical wing damage index (WDI) developed by Reichard and Kunz (2009). Although quantified damage did generally increase with WDI score across all species, statistical separation by WDI was only documented for the big brown bat (blotching, scars, blotching + scars combined) and northern myotis (blotching, blotching + scars). We suggest that studies like ours can provide quantitative species-specific datasets that can be examined in a more precise manner than a categorical index.","PeriodicalId":85037,"journal":{"name":"Journal of the Pennsylvania Academy of Science","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2012-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70852802","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

PROGRAM SESSIONS 项目会议

Journal of the Pennsylvania Academy of Science Pub Date : 2012-12-01 DOI: 10.1364/josa.35.000797

A. Bogacz, Collider Scenarios, Lemc Scenario, Rollin B. Johnson, Y. Alexahin

引用次数: 0

SCHEDULE OF ACTIVITIES AT A GLANCE 活动时间表一目了然

Journal of the Pennsylvania Academy of Science Pub Date : 2012-12-01 DOI: 10.5325/jpennacadscie.86.2.0080

引用次数: 0

THE MARINE SCIENCE CONSORTIUM…HANDS-ON, FEET-WET EDUCATION 海洋科学协会，动手实践的教育

Journal of the Pennsylvania Academy of Science Pub Date : 2012-12-01 DOI: 10.5325/jpennacadscie.86.1.003

Thomas Tauer

引用次数: 0

THE IMPACT OF WOOD TYPE, SEASON, AND REPELLENT USE ON NORTH AMERICAN PORCUPINE DAMAGE 木材类型、季节和驱虫剂使用对北美豪猪伤害的影响

Journal of the Pennsylvania Academy of Science Pub Date : 2012-12-01 DOI: 10.5325/jpennacadscie.86.1.0036

Andie S. Graham, Tolley Roen Keely

{"title":"THE IMPACT OF WOOD TYPE, SEASON, AND REPELLENT USE ON NORTH AMERICAN PORCUPINE DAMAGE","authors":"Andie S. Graham, Tolley Roen Keely","doi":"10.5325/jpennacadscie.86.1.0036","DOIUrl":"https://doi.org/10.5325/jpennacadscie.86.1.0036","url":null,"abstract":"\u0000 We evaluated the impact of wood type, season, and repellent use on North American Porcupine damage to forty installed posts along Rails-to-Trails property in Brockway, Pennsylvania, USA. Treatments were (1) pressure-treated Pine posts with Ro-Pel (a liquid repellent), (2) pressure-treated Pine posts without Ro-Pel, (3) Black Locust posts with Ro-Pel, and (4) Black Locust posts without Ro-Pel. We assessed new damage to posts 1 – 4 times per month from June 2007 – January 2009. All damage was to Pine posts (x− = 12.9 cm2, SE = 3.70 cm2) and no damage was observed to Black Locust posts. Observed damage to untreated posts (x− = 9.93 cm2, SE = 2.10 cm2) was 3.3 times greater than damage to posts treated with Ro-Pel (x− = 2.99 cm2, SE = 2.86 cm2). Total monthly damage to Pine posts was greatest in August (x− = 2.31 cm2, SE = 1.51 cm2) and there was no observed damage in February, October, and November. When examining damage by season, damage to Pine posts was 54 times greater in summer (June – August; x− = 1.62 cm2, SE = 0.567 cm2) than in fall (September – November; x− = 0.030 cm2, SE = 0.030 cm2). We suspect the seasonality observed may be related to salt loss and salt-seeking behavior. We suggest that landowners and managers who anticipate Porcupine damage consider using alternatives to pressure-treated Pine for their wooden structures. In addition, repellent applications could be timed to correspond with the peak of damage to reduce cost.","PeriodicalId":85037,"journal":{"name":"Journal of the Pennsylvania Academy of Science","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2012-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70852746","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

IONIC DEPENDENCY OF SKIN POTENTIAL, TRANSPORT CURRENT, AND THEIR RELATIONSHIP IN LEOPARD FROG (RANA SPP.) VENTRAL EPITHELIA 豹蛙腹侧上皮中皮肤电位、传输电流的离子依赖性及其相互关系

Journal of the Pennsylvania Academy of Science Pub Date : 2012-12-01 DOI: 10.5325/jpennacadscie.86.1.0005

P. Nealen

{"title":"IONIC DEPENDENCY OF SKIN POTENTIAL, TRANSPORT CURRENT, AND THEIR RELATIONSHIP IN LEOPARD FROG (RANA SPP.) VENTRAL EPITHELIA","authors":"P. Nealen","doi":"10.5325/jpennacadscie.86.1.0005","DOIUrl":"https://doi.org/10.5325/jpennacadscie.86.1.0005","url":null,"abstract":"\u0000 Amphibian ventral epithelia can perform significant Na+ transport, as characterized in the now-classic two-membrane model first demonstrated by Ussing and colleagues. This transport is normally demonstrated by using short-circuit current (Isc) to negate transport-generated potentials across epithelia suspended in Ussing chambers. While this model and method have been supported through decades of experimentation, the exact relationship between the transport current and the epithelial potential generated is often ignored, as potentials typically are treated as a factor to be systematically eliminated. Here, leopard frog (Rana spp.) ventral epithelium were utilized in Ussing chambers for tests of specifically how the relationship between epithelial potentials and transport currents depends upon external medium ionic content. Stable skin potentials were recorded using 300 mOsm NaCl; potentials were then reduced to 0 mV via Isc in order to estimate the magnitude of the ionic transport current. A subset of the epithelia prepared was then tested in one or more alternative ionic solutions (300 mOsm KCl, NaHCO3, and CaCl2). While identifiable skin potentials were detected in all solutions tested, only in NaCl were the magnitudes of the epithelial potential and short-circuit current statistically significantly related. Detectable skin potentials in non-Na+-containing solutions indicates the existence of non-Na+ electrogenic activity in this tissue, whose presence explains the relatively poor ability of transport current magnitudes to explain the magnitudes of observed skin potential. Estimates of molecular transport rates for Na+ exceed 4 x 1014 molec sec-1 cm-1, demonstrating the enormous osmoregulatory challenge faced by fresh water amphibians in maintaining ionic homeostasis.","PeriodicalId":85037,"journal":{"name":"Journal of the Pennsylvania Academy of Science","volume":"278 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2012-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70852241","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

LIGHT AND SCANNING ELECTRON MICROSCOPIC OBSERVATIONS OF THE LARVAL STAGES AND ADULT OF SPHAERIDIOTREMA GLOBULUS (TREMATODA: PSILOSTOMIDAE) 球球球孢子虫幼虫期和成虫期的光镜和扫描电镜观察

Journal of the Pennsylvania Academy of Science Pub Date : 2012-12-01 DOI: 10.5325/jpennacadscie.86.1.0061

J. Huffman, P. Stevens, B. Fried

引用次数: 1