Life Sciences Commons^™

Comparative Study Of Elongated Chromosomes In Sheep And Goats And A Proposed Standard, Stephen H. Mensher

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

A cell synchronization technique was used that consistently yielded numerous elongated chromosomes, which are necessary for producing high-resolution G-banding. The prometaphase stage of contraction was determined to have the greatest utility for detailed comparative analysis and, therefore, was used in the preparation of the proposed standard high-resolution karyotypes and idiogram.

A proposed standard high-resolution G-band karyotype of the domestic sheep and goat is presented, along with a high-resolution G-band idiogram of the goat. The karyotypes presented contain considerably more bands than contemporary karyotypes and provide much greater resolution for linear differentiation. The X chromosome of the sheep is acrocentric, rather …

Survival Of Lambs, R W. Kelly, David Lindsay

Journal of the Department of Agriculture, Western Australia, Series 4

Between one in every five or six lambs that are born each year in Western Australia die at or about the time of birth. This represents a loss approaching two million lambs and is arguably out single greatest wastage in sheep production. The deaths have an immediate impact on lambing performance and therefore lamb sales, and ultimately effects on such areas as selection of breeding replacement stock, the proportion of ewes and weathers that can be run in a self-replacing flock and the amount of wool produced and its uality.

This article summarises information on what influences lamb survival, and …

1987 Beef Cattle Report, Irvin T. Omtvedt

Nebraska Beef Cattle Reports

Acknowledgments

Finishing

Determining Moisture of Grain Using Oven, Microwave, and Moisture Tester

Sarsaponin in Receiving Diets of Feedlot Cattle

Effect of Probiotics: Feedlot Receiving Diets

Effect of Roughage Source in Dry or High Moisture Whole Corn Finishing Diets

High Moisure Corn, Dry Grain Combinations for Finishing Cattle

Dry Corn, Wheat Combinations for Finishing Lambs, Cattle

Dry or Wet Corn Bran or Gluten Feed for Ruminants

Corn Gluten Feed: A Review

Methods of Estimating Heat Damage in Protein Sources

Altering Rumen Degradability of Soybean Meal Using Non-Enzymatic Browning

Slaughter Steer Basis, Nebraska Panhandle

Computer Prediction of Finishing Cattle Performance

Cow-Calf

Nutrition …

Late Fall Transmission Of Nematodirus Battus (Nematoda: Trichostrongyloidea) In Western Oregon, Lora G. Rickard, Eric P. Hoberg, Gary L. Zimmerman, Jannell K. Erno

Harold W. Manter Laboratory of Parasitology: Faculty and Staff Publications

Studies on Nematodirus battusCrofton and Thomas, 1951, have shown a marked seasonality in the pattern of transmission. The life cycle normally involves only one parasitic generation per year. The infective third-stage larvae develop over the summer within eggs deposited on pasture. Eggs are sensitized by low temperatures during fall and winter; larval hatching follows in the presence of adequate moisture and proper osmotic conditions as the temperature rises above 10°C. This set of conditions, conducive to hatching, is regularly present only during spring; thus, hatching of eggs is concentrated into a few weeks during this time. Outbreaks of clinical …

Herd Improvement Service Forges Ahead, M P. Bond

Journal of the Department of Agriculture, Western Australia, Series 4

Since its establishment three years ago, the Herd Improvement Service has steadily expanded the range of services provided to Western Australian livestock producers. The genetic advancement and improved hers management offered by the service give farmers the ability to use modern technology in the most cost-effective way. There is an increasing realisation amongst farmers that to survive and remain competitive, it is worthwhile to invest in such technology.

The Herd Improvement Service is a statutory corporation which was formed to improve the productivity of the State's livestock enterprises. Most of the organisation's activities have been directed to servicing the dairy …

The Effects Of Xanthine And Adenosine Analogs On Rat Pup Diaphragmatic Contractility, Liam C. Farrell

Masters Theses

Methylxanthines are commonly used in the treatment of respiratory disorders such as asthma, apnea of prematurity and Cheyne-Stokes respiration. Recently, certain methylxanthines have been found to potentiate the contraction of the diaphragm and increase contraction strength of the fatigued diaphragm. The mechanism of action of the methylxanthines is unknown. Three theories have been proposed but each has its supportive and negative points. One theory is that methylxanthines inhibit cyclic AMP phosphodiesterase (PDE) which facilitates contraction by increasing cyclic AMP levels in the cell. Another theory is that methylxanthines antagonize adenosine, thus blocking the adenosine-induced inhibition of contraction. The third theory …