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35,227 full-text articles. Page 758 of 758.

Update On Heritable Congenital Defects In Cattle, Brian Whitlock 2009 University of Tennessee - Knoxville

Update On Heritable Congenital Defects In Cattle, Brian Whitlock

Brian K Whitlock, PhD, DVM, DACT

Inherited congenital anomalies are probably present in all breeds of cattle and propagated as a result of specific trait selection. In some breeds, the occurrence of inherited anomalies has become frequent, and economically important. Veterinarians, animal scientists, and cattle breeders should be aware of inherited defects, and be prepared to investigate and report animals exhibiting abnormal phenotypes. This review will describe the morphologic characteristics, mode of inheritance, breeding lines affected, and the availability of testing for selected (newly described) heritable bovine fetal abnormalities.


Pathology In Practice. Ranavirus Infection., M. Ruder, A. Allison, Debra Miller, M. Keel 2009 University of Tennessee, Knoxville

Pathology In Practice. Ranavirus Infection., M. Ruder, A. Allison, Debra Miller, M. Keel

Debra L Miller

No abstract provided.


A Bird’S-Eye View On The Function Of Sleep, Charles Amlaner, Niels Rattenborg 2009 Kennesaw State University

A Bird’S-Eye View On The Function Of Sleep, Charles Amlaner, Niels Rattenborg

Charles J. Amlaner

Sleep has been detected in every animal that has been adequately studied (Cirelli & Tononi, 2008). The ubiquitous nature of sleep suggests that it evolved early in the course of evolution and therefore may serve a conserved function essential to all animals. This hypothesis forms the rationale behind the development of “simple” animal models of sleep (Allada & Siegel, 2008; Mignot, 2008). By studying sleep in animals such as the fruit fly (Drosophila melanogaster), where the power of genetic techniques can be readily employed,we may gain insight into the initial (perhaps cellular) function of sleep, a function that may still be relevant to understanding sleep in humans. Indeed, recent studies have already demonstrated remarkable similarities between sleep in Drosophila and sleep in mammals (Hendricks, Finn, Panckeri, et al., 2000; Shaw, Cirelli, Greenspan, et al., 2000; reviewed in Cirelli & Bushey, 2008). Although the utility of studying sleep in“simple”animal models is undeniable, it is unlikely that this approach alone will tell the whole story, especially given that Drosophilado not exhibit brain states comparable to mammalian slow-wave sleep (SWS) and rapid eye-movement (REM) sleep (Cirelli, 2006; Cirelli & Bushey, 2008; Hendricks & Sehgal, 2004; Nitz, van Swinderen, Tononi, et al ...


3hsds1和17hsds7基因5'上游区转录活性研究.Pdf, Xinxing Dong, Yi Xin, Ying Bai, Yunzhou Yang, Jibin Zhang, Meiying Fang, Gang Chen 2009 China Agricultural University

3hsds1和17hsds7基因5'上游区转录活性研究.Pdf, Xinxing Dong, Yi Xin, Ying Bai, Yunzhou Yang, Jibin Zhang, Meiying Fang, Gang Chen

Jibin Zhang

3β-hydroxysteroid dehydrogenases (HSDs) and 17βHSDs are pivotal enzymes involved in synthesis, activation and deactivation of steroid hormones. Therefore, they play an important role to maintain homeostasis of hormone and regulate the synthesis and metabolism of hormones, and they are also related to metabolism of androstenone which can cause boar taint in male pigs. Through ligation of different PCR fragments of these genes from Large White pigs to pGL3-basic plasmid and subsequent transient transfection of constructed vectors into HepG2 cell culture, we found that the fragment from -1038bp to 45bp in porcine 3βHSD gene and the fragment from -966bp to 39bp ...


Toward Genuine Rodent Welfare: Response To Reviewer Comments, Jonathan P. Balcombe 2009 Humane Society Institute for Science and Policy

Toward Genuine Rodent Welfare: Response To Reviewer Comments, Jonathan P. Balcombe

Jonathan Balcombe, Ph.D.

No abstract provided.


A Simplified Method For Monitoring Progestagens In African Elephants Under Field Conditions, Bruce A. Schulte, Elizabeth W. Freeman, F. Nicole Abbondanza, Jordana M. Meyer, Janine L. Brown 2009 Western Kentucky University

A Simplified Method For Monitoring Progestagens In African Elephants Under Field Conditions, Bruce A. Schulte, Elizabeth W. Freeman, F. Nicole Abbondanza, Jordana M. Meyer, Janine L. Brown

Bruce A. Schulte

Summary
1. Hormone analyses are frequently used to support management of wildlife; however, current techniques are not very field-friendly. In situ hormone monitoring is often expensive, time consuming and logistically difficult. Thus, a new method for assessing ovarian cycle activity non-invasively in free-ranging African elephants was developed. 2. The technique involves handshaking faecal samples in common organic solvents, use of environmentally stable antibody-coated microtitre plates and assessment of progestagen concentrations based on a visual colour change.
3. Studies using ex situ African elephants determined that handshaking faeces in a solution of isopropyl alcohol was effective for extracting the faecal progestagens ...


Regulatory Elements Of Xenopus Col2a1 Drive Cartilaginous Gene Expression In Transgenic Frogs, Ryan Kerney, Brian K. Hall, James Hanken 2009 Dalhousie University

Regulatory Elements Of Xenopus Col2a1 Drive Cartilaginous Gene Expression In Transgenic Frogs, Ryan Kerney, Brian K. Hall, James Hanken

Ryan Kerney

This study characterizes regulatory elements of collagen 2α1 (col2a1) in Xenopus that enable transgene expression in cartilage-forming chondrocytes. The reporters described in this study drive strong cartilage-specific gene expression, which will be a valuable tool for further investigations of Xenopus skeletal development. While endogenous col2a1 mRNA is expressed in many embryonic tissues, its expression becomes restricted to tadpole and adult chondrocytes. This chondrocyte-specific expression is recapitulated by col2a1 reporter constructs, which were tested through I-SceI meganuclease-mediated transgenesis. These constructs contain a portion of the Xenopus tropicalis col2a1 intron, which aligns to a cartilage-specific intronic enhancer that has been well characterized ...


Erau Aviation Wildlife Hazard Newsletter, Paul F. Eschenfelder 2009 Embry Riddle Aeronautical University - Daytona Beach

Erau Aviation Wildlife Hazard Newsletter, Paul F. Eschenfelder

Paul F. Eschenfelder

No abstract provided.


Laboratory Rodent Welfare: Thinking Outside The Cage, Jonathan P. Balcombe 2009 Humane Society Institute for Science and Policy

Laboratory Rodent Welfare: Thinking Outside The Cage, Jonathan P. Balcombe

Jonathan Balcombe, Ph.D.

No abstract provided.


A Brief History Of The American Fish Culture Company 1877-1997., Michael A. Rice 2009 University of Rhode Island

A Brief History Of The American Fish Culture Company 1877-1997., Michael A. Rice

Michael A Rice

The American Fish Culture Company operated for nearly 120 years from 1877-1997 in Carolina, Rhode Island growing three species of trout under the under the direction of several generations of the Hazard family of Peace Dale, Rhode Island. The company was one of the first trout producers in the United States, and was considered the largest fish farm in the country by the early 1920s. Major innovations of the company included early adoption of pelleted feeds, and the introduction of photoperiod manipulation to spawn fish out of season. The company ultimately failed due to intense competition from larger producers in ...


Farm Focus - Spring 2010, Brian K. Whitlock, Matt Welborn, Maria Prado, Amy Plummer 2009 University of Tennessee - Knoxville

Farm Focus - Spring 2010, Brian K. Whitlock, Matt Welborn, Maria Prado, Amy Plummer

Brian K Whitlock, PhD, DVM, DACT

No abstract provided.


Where The Tiger Survives, Biodiversity Thrives, Philip J. Nyhus, Ronald Tilson 2009 Colby College

Where The Tiger Survives, Biodiversity Thrives, Philip J. Nyhus, Ronald Tilson

Philip J. Nyhus

No abstract provided.


Assessing The Value Of Dna Barcodes And Other Priority Gene Regions For Molecular Phylogenetics Of Lepidoptera, John James Wilson 2009 University of Malaya

Assessing The Value Of Dna Barcodes And Other Priority Gene Regions For Molecular Phylogenetics Of Lepidoptera, John James Wilson

John James Wilson

Background: Despite apparently abundant amounts of observable variation and species diversity, the order Lepidoptera exhibits a morphological homogeneity that has provided only a limited number of taxonomic characters and led to widespread use of nucleotides for inferring relationships. This study aims to characterize and develop methods to quantify the value of priority gene regions designated for Lepidoptera molecular systematics. In particular, I assess how the DNA barcode segment of the mitochondrial COI gene performs across a broad temporal range given its number one position of priority, most sequenced status, and the conflicting opinions on its phylogenetic performance. Methodology/Principal Findings ...


Airport Wildlife Hazard Control, Paul F. Eschenfelder 2009 Embry Riddle Aeronautical University - Daytona Beach

Airport Wildlife Hazard Control, Paul F. Eschenfelder

Paul F. Eschenfelder

No abstract provided.


Polyphyly Of The Pikeminnows (Teleostei: Cyprinidae) Inferred Using Mitochondrial Dna Sequences, T. Heath Ogden 2009 Utah Valley University

Polyphyly Of The Pikeminnows (Teleostei: Cyprinidae) Inferred Using Mitochondrial Dna Sequences, T. Heath Ogden

T. Heath Ogden

The phylogenetic relationships of the Colorado pikeminnow Ptychocheilus lucius, northern pikeminnow P. oregonensis, Sacramento pikeminnow P. grandis, Umpqua pikeminnow P. umpquae, and hardhead Mylopharodon conocephalus were examined by using molecular data to investigate monophyly of the genus Ptychocheilus. Phylogenies generated using DNA sequence data from the cytochrome b and 16S ribosomal DNA genes of the mitochondrial genome reveal that Ptychocheilus is a polyphyletic genus and suggest that the taxonomy of the group is in need of further revision. These data yield insights into the evolution of the pikeminnows and help place the significant evolutionary events in context with the geological ...


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