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A Proposed Mechanism Of Action For In Vitro Excystation Of Two Species Of Coccidia, William Ronald Jolley

Theses and Dissertations

Excystation of coccidian oocysts is accomplished in vitro by altering wall permeability with CO2 and a reducing agent, then activating the enclosed sporozoites with a solution of trypsin and bile. Elucidation of the mechanism of action of the CO2-reducing agent treatment was the basic intent of this study. Oocysts of Eimeria stiedae (rabbit) and E. tenella (chicken) were tested for the presence of an excystation-associated enzyme by incubating sporulated oocysts in fluids extracted from variously treated oocysts, and by carbon-14 labelling; the effect of CO2 -reducing agent treatment on oocyst walls was investigated by titration with acid or base for …

Annual Nutrient And Energy Intake Of The Desert Cottontail, Sylvilagus Auduboni, Under Natural Conditions, H G. Reynolds, F. J. Turkowski, R. M. Chew

Memorandum

No abstract provided.

G73-15 Handling Feed Moisture In Ration Formulation And Inventory Control (Revised December 1983), Paul Q. Guyer

University of Nebraska-Lincoln Extension: Historical Materials

Nutritional quality control begins with knowing and adjusting for variation in the moisture content of feed ingredients. Moisture variations in feeds are almost always of more importance than variations in protein, mineral, and energy. Inventory control is affected by moisture content of feeds. Some feeds on hand are constantly changing in moisture content, and these changes frequently lead to financial losses when a price adjustment is not made for moisture losses.

Curlew Valley Validation Site Report, David F. Balph

Memorandum

No abstract provided.

Consumption, Utilization And Modification Of Nutritional Resources By The Jackrabbit (Lepus Californicus) In The Mohave Desert, V.H. Shoemaker, K.A. Nagy, W.R. Costa

Memorandum

No abstract provided.

Ec73-1907 Internal Parasites Of Cattle, D. L. Ferguson

University of Nebraska-Lincoln Extension: Historical Materials

Extension Circular 73-1907 is about internal parasites in cows and how they affect cattle production.

Internal parasites continue to be one of the major problems confronting cattle producers. In 1965, the United States Department of Agriculture estimated that internal parasites in cattle caused an average annual loss of $161,678,000. The internal parasites responsible for the annual loss are listed below.

Anaplasmosis. .$ 36,001,000

Coccidiosis . . . .14,569,000

Worm Parasites .100,046,000

Liver Flukes . . . 3,022,000

Trichomoniasis .. 8,040,000

In cattle the effects of internal parasites will be well camouflaged. However, additional feed will be required to reach market …

Agricultural Experiment Station News January 1973

Agricultural Research Division: News and Annual Reports

CONTENTS:
FROM THE DIRECTOR’S DESK
TRAVEL EXPENSES
PERSONNEL ACTIONS
GRANTS AND CONTRACTS
GENERAL NOTES
NEBRASKA AGRICULTURAL EXPERIMENT STATION PUBLICATIONS - December 1972
BULLETINS PRINTED
ABSTRACTS

Sheep Liver Copper Levels, J W. Gartrell

Experimental Summaries - Plant Research

Introduction.

Our knowledge, and consequently our advise to farmers on the needs for copper fertilizers in the wheatbelt have been largely based on thoses of plants - cereals in particular. For one thing, definitive experimentation is easier with cereals than sheep.

Discussion.

Interpretation.

Appendix.

Dried Whey As An Additive For Alfalfa Haylage And As A Grain Supplement For Dairy Cows, Sitakantha Dash

Electronic Theses and Dissertations

This research was conducted to explore the possibility of utilizing surplus whey in dairy cattle rations. Four experiments determined the influence of whey on preservation, digestibility and feeding value of alfalfa haylage. The last experiment was initiated to evaluate dried whey as a grain supplement. When dried whole whey was added at O, 1, and 10% levels to reconstituted alfalfa haylage (chopped baled hay plus 50% water) and preserved in sealed metal containers, it reduced pH, decreased acetic acid, and increased lactic acid. The general pattern of fermentation was better in whey-treated haylages than in corresponding untreated haylages. An in …

Rapid Alterations In Rat Brain Tryptophan Hydroxylase Activity; Effects Of Adrenal Steroids, Drugs And Stressors, Efrain Charles Azmitia Jr.

Student Theses and Dissertations

Tryptophan (TP) hydroxylase activity was measured using a modification of the method developed by Ichiyama et al. (1968). The distribution of the enzyme in the rat brain was determined and found to correlate with serotonin (5-HT) distribution. Bilateral adrenalectomy resulted in a decrease enzyme activity in most areas examined with the largest drop occurring in the midbrain. A similar decrease was found in 5-HT in vivo turnover. Injection of corticosterone led to an increase both in normal and adrenalectomized rats. This increase was blocked by cycloheximide, a protein synthesis inhibitor. The midbrain enzyme activity was increased in normal rats by …

Objective Measurement And The Stud Breeder, B R. Beetson

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

The movement towards sale of wool by certificate and sample highlights the significance of objective measurement in the Merino stud breeders' selection of his top rams.

This article suggests how stud breeders should use the Department of Agriculture's Flock Testing Service to gain genetic progress in wool producing ability without loss of visual buyer appeal.

Studs' use of the service will be evaluated in 1974.

Lot Feeding Sheep In Sheds, H E. Fels, B. Malcolm

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

The need to gather and hold sheep for slaughter or live shipment led a West Australian company!, with the Department of Agriculture, to investigate the use of sheds for short term lot feeding of sheep. Preliminary examination suggested that feedlot sheds connected by a sheep footpath to the abattoirs, railway or saleyards could be cheaper as well as more practicable than continued use of holding paddocks.

The first week or two are commonly the most difficult in lot feeding sheep or cattle. Long-term indoor lot-feeding is a normal practice in some overseas countries but we did not know whether untrained …

Nitrogen For Pastures, Department Of Agriculture, Western Australia

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

The use of nitrogen (N) fertilisers on cereals has long been recognised and accepted as an economic farm practice. It is only more recently that the use of fertiliser nitrogen has been considered for pasture and fodder production, mainly on wholemilk and butterfat farms in the South-West. The high quality feed produced may be substituted for concentrates or conserved fodder. Large increases in seasonal production have been reported.

Because nitrogen fertiliser is expensive, has a short-term effect, and can affect the clover content of pastures, a series of field experiments were conducted in 1973 to examine the role of nitrogen …

Parameters Of Growth Of Holstein-Friesian Bulls, L. L. Calo, R. E. Mcdowell, L. Dale Van Vleck, P. D. Miller

Department of Animal Science: Faculty Publications

Growth records of 504 pedigree selected Holstein-Friesian bulls by 120 sires collected for progeny testing at the American Breeders Service, Inc., DeForest, Wisconsin from 1964 to 1971, were studied to determine the shape of the growth curve, relationships among body weights and growth rates at various ages and to estimate heritability of growth. Body weight and average/daily gain were consistently higher than the previous growth standards for Holstein-Friesian bulls. Bulls weighed about 480 kg at 15 months, which was 46% of average mature weight. Average daily gain ranged from 1.3 to 0.8 kg between 6 and 18 months of age. …

Effect Of Amino Acids On Non-Protein Nitrogen Utilization By G-F Swine, P. D. Platter, E. R. Peo, Jr., P. E. Vipperman, P. J. Cunningham

Department of Animal Science: Faculty Publications

Two metabolism and one feeding experiment were conducted with a total of 118 crossbred pigs to determine the effect of amino acids on non-protein nitrogen (NPN) utilization by G-F swine.

Block And Bridle Annual, 1973

Block and Bridle Annual (1933–2021)

Table of Contents:

Dr. Baker's Address
Staff Comments
President's Speech
Advisors
Officers
Committee Chairmen
Membership
Animal Science Staff
Graduate Students
Animal Science Graduates
Quarter Horse Show
Appaloosa Horse Show
Program Revue
Livestock Judging Contest
Meats Judging Contest
Honor's Banquet
Junior Scholarship Award
Senior Merit Trophy Winner
Honoree Portrait Presentation
Page ASAS Trip
B & B State Fair Awards
Fall Steak Fry
Kids Day
Little AK-SAR-BEN
Ham Sales
Christmas Coffee
B&B Dance
Queen Finalists
Queen
Number Stickers & National B & B Report
Spring Tour
Senior Livestock Judging Team
Senior Meats Judging Team
Junior Livestock Judging Team
Junior Meats Judging Team …

Evaluation Of Purebreds And Two-Breed Crosses In Swine: Feedlot Performance And Carcass Merit , R. K. Johnson, I. T. Omtvedt, L. E. Walters

Department of Animal Science: Faculty Publications

Feedlot performance of 941 barrows and gilts and carcass traits of 190 barrows of purebreds and crossbreds of the Duroc, Hampshire and Yorkshire breeds were evaluated for differences between purebreds and reciprocal crosses and for heterosis. Purebred and crossbred litters were farrowed contemporaneously at the Ft. Reno Experiment Station in the 1971 spring and fall farrowing seasons.

Rather distinct differences between the pure breeds were evident for most traits. In general, Durocs gained weight more rapidly than Hampshires and Yorkshires while Yorkshires were the most efficient pure breed. Hampshire barrows had less backfat, more loin eye area and more total …

G73-14 Grain Processing For Feedlot Cattle, Paul Q. Guyer

University of Nebraska-Lincoln Extension: Historical Materials

Several changes have occurred in the cattle feeding business which have focused attention on grain processing. The first of these was, the arrival of big feedlots provided an opportunity to use larger and more sophisticated processing equipment at reasonable cost per ton of feed produced. Also, the need to minimize feed separation and digestive disturbances encouraged the use of more sophisticated methods of processing.

A second development that is now focusing attention on grain processing is the rapidly increasing costs of equipment, fuel and labor involved in grain processing. In recent years, these have been increasing more rapidly than the …

1973_Pasture Species Investigations - Wheatbelt, N. R. Mckeown

Experimental Summaries - Plant Research

Results from trials comparing the growth and persistence of a number of annual pasture legumes in 1973 are presented in this report. Rainfall conditions during the year are described briefly and a table of annual and growing season rainfall at relevant centres is appended. The experiments are grouped as follows according to average annual rainfall:- Zone A - Average annual rainfall 400 mm. Zone B - Average annual rainfall 345 - 400 mm. Zone C - Average annual rainfall 345 mm. and then further on soil type. 70GE4, 70ME3, 70ME4, 70NA3, 70TS2, 70TS5, 71LG16, 71TS22, 72LG3, 72LG26,

Mineral Nutrition Of Unicrop Lupins, J. W. Gartrell

Experimental Summaries - Plant Research

73MO35. Lancelin

Selenium And Sheep Health, B J. Gabbedy, A. J. Hadlow

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

For many years selenium was known to the livestock industries only because of its toxic properties. Some soils, particularly in the United States of America, were so high in selenium that many animals died after grazing plants on these soils.

In 1957 it was discovered that selenium supplements could prevent a number of diseases and, from that time, selenium has been regarded as an essential trace element.

White muscle disease (WMD) was first recognised in sheep in Western Australia in 1960 and has occurred each year since.

Lupin Split Seed Pilot Trial - Esperance Downs Research Station., J. W. Gartrell

Experimental Summaries - Plant Research

Lupin Split Seed Pilot Trial. Esperance Research Station 1974. % of seed classed according to size and degree of splitting. Manganese - S Richardson - Dandaragan 73PE2

Gain, Feed Conversion And Carcass Traits Of Swine Fed Under Two Nutritional Regimes, P. J. Cunningham, T. E. Socha, E. R. Peo, Jr., R. W. Mandingo

Department of Animal Science: Faculty Publications

Data involving 505 Gene Pool boars, barrows and gilts and 126 Hampshire boars and gilts fed two nutritional diets were presented. One diet consisted of high lysine corn, minerals and vitamins (10% protein) while the other diet was a 14% protein corn-soy diet.

Reproductive Efficiency And Viability In Two Bos Indicus And Two Bos Taurus Breeds In The Tropics Of India And Colombia, L. (Lemka) Hamed, R. E. Mcdowell, L. Dale Van Vleck, H. Guha, J. J. Salazar

Department of Animal Science: Faculty Publications

Records from two herds in India and two in Columbia representing respectively two breeds of Bos indicus (Hariana and Deshi) and two Bos taurus breeds—Blanco Orejinegro (BON) and Costeño Con Cuernos (CCC) were evaluated for breeding efficiency and viability. Average age at first calving was 52.1, 46.3, 39.5 and 40.7 months for Hariana, Deshi, CCC and BON. Season of birth did not influence age at calving. Ranking for calving interval was similar, average 479, 418, 396 and 382 days with season effects significant (P<.05) for only Deshi. BON and CCC had fewer days open but much shorter lactation periods, average 73 and 157, thus days carried calf in lactation were similar for all breeds. Percent of time dry per calving interval was high for all breeds, 44.2, 36.7, 64.1 and 81.0 for Hariana, Deshi, BON and CCC. Average annual mortality of females by 12 months of age was 23.6% for Hariana, 17.0% Deshi and 27.0% BON. In the same herds 46.4%, 51.1% and 49.0% of females born alive lived to first calving and annual losses among cows were 18.0%, 17.0%, and 21.0%; therefore, affording little opportunity for selection among females. Temperament, as determined by response to the milking process with and without the calf present, showed all the breeds were similar in this respect. Environmental effects were most important for all traits but genetic differences were indicated for age at first calving and milk yield. On a theoretical basis little gain could be expected in net dairy merit from crosses between the Columbian and Indian breeds.

Partial Characterization Of Animal Growth Inhibitors From Soybeans, Joseph Richard Uckert

Electronic Theses and Dissertations

The pH 4. 4 supernatant from raw (unheated) soybean meal was separated into 5 fractions on a Sephadex G-25 column in efforts to isolate the animal growth inhibitors present soybeans. Each fraction was added to the diet of growing mice and growth inhibition (GI) activity was determined by comparing their_ growth rates to g1"'owth rates achieved on an autoclaved soybean meal diet. Fractions I and II each contained about 50% of the GI activity, with a trace in fraction III and none in fractions IV and V. Only fraction I contained trypsin inhibitor and caused pancreatic enlargement. Fraction I was …

The Vitamin E Status Of Lactating Dairy Cows After Receiving Stored Feeds For 15 Months, Marc Dellhime Eckhart

Electronic Theses and Dissertations

The trend in dairying in recent years has been towards more confinement housing and higher producing animals. Such confinement housing often leads to year-around feeding of stored feeds, such as silage, haylage, and hay with no pasture grazing or feeding of freshly cut forages. Since stored feeds contain substantially less vitamin E than those same forage when freshly cut or grazed, it may be important to re-evaluate the vitamin E status of cows fed stored feeds continuously. The requirement of cattle for vitamin E are largely unknown. The one study involving adult cattle, conducted 25 years ago, found that 1.82 …

The Effects Of Crowding On The Diurnal Ascorbic Acid Levels Of Albino Rats, Mary Jo Barr

Masters Theses

The adrenal physiology of the albino rat was studied through the measurement of adrenal ascorbic acid levels. A cyclic phenomenon was observed which follows the diel periodicity of the animal. Ascorbic acid values were found to be characteristically higher in males than in females. A similar difference was also seen in populations divided into young animals (body weight less than 175 grams) and old animals (body weight greater than 175 grams). Crowding, induced by manipulating the area of cage space per gram of body weight, was observed to be a definite stressor and caused the adrenal ascorbic acid levels to …

Grass-Woody Plant Relationships, A.W. Bailey, R.K. Gupta

Aspen Bibliography

No abstract provided.

History Of Extension, Cooperative Extension Service, South Dakota State University, Epsilon Sigma Phi, South Dakota Chapter

SDSU Extension Publications Archive

The College had been doing a certain amount of Extension work since 1901, 13 years before the Smith-Lever Act was passed. This work consisted mainly of holding farmers' institutes, addressing farmers' meetings and judging at county fairs. During this 13-year period (1901-1914), four different superintendents were employed. Stacy Cochran served for two years. The work was discontinued for two years, and in 1905 it was reestablished under M. F. Greeley. He was succeeded in a short time by A. E. Chamberlain. The last man to hold the position before the work finally merged into Extension work was H. F. Stoner …

America's Systematics Collections: A National Plan, Howard S. Irwin, Willard W. Payne, David M. Bates, Philip S. Humphrey, Belmont Writing Committee

University of Nebraska State Museum: Programs Information

"America's Systematics Collections: A National Plan'' is a report to the nation's systematics collections community, and includes a National Plan for the recognition and development of systematics coilections as an important national resource in the United States. The report states the goals of the systematics collections commnnity, and documents the importance of systematics coliections to science, society and education. The problems of the systematics collections community are identified and discussed. Recommendations are presented that, if implemented, could permit the systematics coiiections community to achieve its goals; the recommendations are reiterated within a framework of prioritiei. Eitimated new Support required by …