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Articles 961 - 990 of 1417

Full-Text Articles in Dairy Science

Western Dairy Center Project Report, Donald J. Mcmahon, Jeffery Broadbent, Craig Oberg Jan 1997

Western Dairy Center Project Report, Donald J. Mcmahon, Jeffery Broadbent, Craig Oberg

Other Documents

No abstract provided.

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Use Of The Relative Dose Response Assay To Determine The Vitamin A Status Of Neonatal Calves: Effects Of Season On Colostrum Quality And Immunological Parameters, Mary Jo Boner Jan 1997

Use Of The Relative Dose Response Assay To Determine The Vitamin A Status Of Neonatal Calves: Effects Of Season On Colostrum Quality And Immunological Parameters, Mary Jo Boner

Electronic Theses and Dissertations

Plasma vitamin A is not a reliable indicator of vitamin A status. Therefore, the feasibility of using the relative dose response (RDR) assay as a method for determining vitamin A status of calves was examined. In addition, effects of colostrum quality and season on vitamin A status and health of calves were determined. Blood was sampled from the jugular vein of 16 newborn calves to establish values over a 24 h period for immunoglobulin M (IgM) concentration, hematocrit, serum protein concentration, and leukocyte differentials. Liver biopsies were performed at birth, and successfully completed for 11 calves. Blood samples were obtained …

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Bovine Mastitis Pathogens In New York Andpennsylvania: Prevalence And Effects On Somatic Cell Count And Milk Production, David J. Wilson, R. N. Gonzalez, H. H. Das Jan 1997

Bovine Mastitis Pathogens In New York Andpennsylvania: Prevalence And Effects On Somatic Cell Count And Milk Production, David J. Wilson, R. N. Gonzalez, H. H. Das

Animal, Dairy, and Veterinary Science Faculty Publications

Milk samples were collected from 108,312 dairy cows during 1601 farm visits made between January 1991 and June 1995. The herd visits were made by personnel from the Central Laboratory of the Quality Milk Promotion Services at Cornell University (Ithaca, NY) to farms located in central New York and northern Pennsylvania. Dairy Herd Improvement Association records were available for 32,978 cows in 327 herds. Intramammary infections, as defined by positive milk cultures, were present in 48.5% of all cows and in 36.3% of cows in herds enrolled in the Dairy Herd Improvement Association. Over 75% of the intramammary infections were …

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In Vitro Influenza Virus-Inhibitory Effects Of A Series Of Germanium- Orsilicon-Centered Polyoxometalates, J. H. Huffman, R. W. Sidwell, Dale L. Barnard, A. Morrison, M. I. Otto, C. L. Hill, R. F. Schinazi Jan 1997

In Vitro Influenza Virus-Inhibitory Effects Of A Series Of Germanium- Orsilicon-Centered Polyoxometalates, J. H. Huffman, R. W. Sidwell, Dale L. Barnard, A. Morrison, M. I. Otto, C. L. Hill, R. F. Schinazi

Animal, Dairy, and Veterinary Science Faculty Publications

A series of germanium- or silicon-centred heteropolytungstates (polyoxometalates) with the Barrel, Keggin or double Keggin structure were evaluated in vitro for their effects against influenza A (IV-A) and B (IV-B) viruses. Their 50% effective concentrations (EC50) against recent isolates of IV-A (H1 N1 ) and IV-B ranged from 0.1 to 7.8 μM; against IV-A (H3N2), the EC50 concentrations were often 10-fold higher. Recent clinical isolates of IV-A were generally more susceptible to these antiviral effects than older, laboratory-adapted strains. These experiments used inhibition of viral CPE in MDCK cells as determined microscopically and by Neutral Red (NR) …

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Acyclic Phosphonomethylether Nucleosideinhibitors Of Respiratory Viruses, Dale L. Barnard, N. Bischofberger, C. U. Kim, J. H. Huffman, R. W. Sidwell, J. P. Dougherty, W. Lew, M. A. Williams, W. Yang Jan 1997

Acyclic Phosphonomethylether Nucleosideinhibitors Of Respiratory Viruses, Dale L. Barnard, N. Bischofberger, C. U. Kim, J. H. Huffman, R. W. Sidwell, J. P. Dougherty, W. Lew, M. A. Williams, W. Yang

Animal, Dairy, and Veterinary Science Faculty Publications

A series of acyclic phosphonomethylether nucleosides were synthesized and then evaluated for inhibitory activity against respiratory viruses of clinical significance using CPE inhibition, neutral red uptake and virus yield reduction assays. Of the 20 compounds synthesized, none significantly inhibited influenza A or B viruses or respiratory syncytial virus strains A2, Long or 18537; the selective indices (SI) were less than 10. A new compound, GS-2128 (2R, 5R-9-[2,5-dihydro-5-(phosphonomethoxy)-2-furanyl]adenine; D4API), selectively inhibited adenovirus 5 (SI>10) as did GS-0577 (9-(3-hydroxy-2-phosphonylmethoxypropyl)-adenine; HPMPA) and GS-0504 [(S)-1-[3-hydroxy-2-(phosphonylmethoxypropyl)]-cytosine; HPMPC]. The 50% effective concentrations (EC50) ranged from 8-100 μg mL-1 and 50% cell inhibitory concentrations (CC50) from …

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12th Biennial Cheese Industry Conference, Various Authors Aug 1996

12th Biennial Cheese Industry Conference, Various Authors

Cheese Industry Conference

No abstract provided.

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The Influence Of Fluorescent Light On The Development Of In Vitro Fertilized Bovine Oocytes, Jared Bunch Aug 1996

The Influence Of Fluorescent Light On The Development Of In Vitro Fertilized Bovine Oocytes, Jared Bunch

Undergraduate Honors Capstone Projects

Advances in in vitro fertilization and in vitro culture techniques have allowed considerable progress in identifying physiological requirements of mammalian embryos. Parrish et al. (11) reported a major breakthrough on in vitro fertilization when his group identified heparin as an important factor for the capacitation of spermatozoa. Capacitation is necessary for fertilization of matured oocytes. During the precoculture era of embryos (prior to 1980), the development of early preirnplantation embryos was vary limited regardless of medium, medium supplement, gas atmosphere, osmolarity or pH used (7). Coculture techniques of fertilized oocytes using somatic cells during in vitro production, particularly of bovine …

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Expression Of A Bovine Κ-Cn Cdna In The Mammary Gland Of Transgenic Mice Utilizing A Genomic Milk Protein Gene As An Expression Cassette, Alfonso Gutiérrez, Harry M. Meade, Paul Ditullio, Daniel Pollock, Merry Harvey, Rafael Jiménez-Flores, Gary B. Anderson, James D. Murray, Juan F. Medrano Jul 1996

Expression Of A Bovine Κ-Cn Cdna In The Mammary Gland Of Transgenic Mice Utilizing A Genomic Milk Protein Gene As An Expression Cassette, Alfonso Gutiérrez, Harry M. Meade, Paul Ditullio, Daniel Pollock, Merry Harvey, Rafael Jiménez-Flores, Gary B. Anderson, James D. Murray, Juan F. Medrano

Dairy Science

Transgenic mice were produced by microinjection of a DNA construct composed of the bovine κ-casein (κ-CN) cDNA under the control of the goat β-CN 5' promoter elements and 3' flanking regions into pronuclear-stage embryos. The gene construct targeted the expression of bovine κ-CN RNA to the mammary gland and secretion of bovine κ-CN in the milk. In the three lines studied (BC-7, BC-31 and BC-67) the transgene was stably integrated and propagated as a Mendelian locus. Expression of the bovine protein in lactating mice from the three transgenic lines was demonstrated by northern and western blots. In ten different tissues …

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The Use Of The Xylose Tolerance Test As An Indicator Of Malabsorption In Cryptosporidiosis, James A. Evans May 1996

The Use Of The Xylose Tolerance Test As An Indicator Of Malabsorption In Cryptosporidiosis, James A. Evans

Undergraduate Honors Capstone Projects

Cryptosporidium parvum, a protozoan parasite infecting epithelial cells lining the intestinal tract of animals and humans, causes fulminate diarrhea and malabsorption of essential nutrients following damage to the cellular brush border. The present study was undertaken to evaluate the use of a pentose sugar (D-xylose) in a standardized tolerance test as an indicator of malabsorption due to cryptosporidiosis in the dexamethasone (DEX)-immunosuppressed adult C57BL/6N mouse model. One group containing 14 experimental mice (in addition to appropriate control groups) was immunosuppressed using daily intraperitoneal injections of DEX (125 μg/mouse). On day 7 postimmunosuppression, mice were inoculated orally with 104 C. …

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Forty Years Of Rangeland Research In The Meekatharra And Wiluna Districts (1956-1996), Andrew Thomson, John Morrissey Mar 1996

Forty Years Of Rangeland Research In The Meekatharra And Wiluna Districts (1956-1996), Andrew Thomson, John Morrissey

Agriculture reports

This document is an account of the research undertaken by this Branch over the past 40 years, and it provides a general explanation of the results. It also includes descriptions of many of the Land Conservation District projects at Meekatharra and Wiluna. A number of trials and community based projects from other districts relevant to this publication have also been included as supplementary information.

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Dairy Digest 1995-1996, South Dakota State University Dairy Club Jan 1996

Dairy Digest 1995-1996, South Dakota State University Dairy Club

Dairy Digest

No abstract provided.

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1996 Annual Report, Various Authors Jan 1996

1996 Annual Report, Various Authors

Annual Reports

No abstract provided.

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1995 Annual Report, Various Authors Jan 1996

1995 Annual Report, Various Authors

Annual Reports

No abstract provided.

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Improving Dairy Farm Performance, Ruth Dilley Jan 1996

Improving Dairy Farm Performance, Ruth Dilley

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

Western Austraian sairy farmers produce more milk per cow and per farm than their eastern Sttates counterparts and the milk is also of higher quality. But there is always room for improvement and as grain prices rise it is crucial that maximum benefit is derived from the cheapest feed source - the pasture.With this in mind Ruth Dilley looks at the Dairy Farm Performance Program - a comprihensive farm database developed by Agriculture Western Australia.

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Uht Milk : Expanding The Market, Caroline Love, Ian Bell, Martin Robertson Jan 1996

Uht Milk : Expanding The Market, Caroline Love, Ian Bell, Martin Robertson

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

An increase in the export of UHT (Ultra Heat Treated) milk to Asian markets is potentially worth millions of dollars to the dairy inmdustry. This increase however, relies on the shelf life of UHT products being extended to nine months. Spoilage of UHT milk can be caused by bacterial spores which originate on-farm and are resistant to processing. Expansion in the UHT market therefore relies on a continued reduction in the number of these spores getting into raw milk. Caroline Love, Ian Bell and Martin Robertson report on the sources of spores entering milk on-farm and the control methods available.

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Ultrastructural Changes In The Milk Gland Of Tsetse Glossina Morsitans Centralis (Diptera; Glissinidae) Female Infected By A Dna Virus, Rosemary C. Sang, Walter G.Z.O. Jura, Leonard H. Otieno, Peter Ogaja Jan 1996

Ultrastructural Changes In The Milk Gland Of Tsetse Glossina Morsitans Centralis (Diptera; Glissinidae) Female Infected By A Dna Virus, Rosemary C. Sang, Walter G.Z.O. Jura, Leonard H. Otieno, Peter Ogaja

All Peer-Reviewed Publications

Milk glands, dissected out and collected from Glossina morsitans centralis (Machado) females, artificially inoculated at the third-instar larval stage with a virus suspension obtained from hypertrophied salivary glands of wild-caught virus-infected Glossina pallidipes (Austen), were processed for routine electron microscopy and examined for pathological changes. They were compared to milk glands dissected out from normal female G.m. centralis at the same stage of pregnancy cycle. Upon dissection there were notable physical differences between control and virus-infected milk glands. Histologically, some areas of the gland developed severe degeneration while other areas developed less severe pathological changes. Ultrastructural studies revealed the presence …

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Lowfat Cheese Research Conference Proceedings, Various Authors Nov 1995

Lowfat Cheese Research Conference Proceedings, Various Authors

Other Documents

No abstract provided.

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Productive Pastures Pay - A Manual On Pasture Establishment And Management For The Above 700 Mm Rainfall Zone, P T. Arkell Apr 1995

Productive Pastures Pay - A Manual On Pasture Establishment And Management For The Above 700 Mm Rainfall Zone, P T. Arkell

Bulletins 4000 -

This manual on pasture establishment andmanagement is designed to help farmers grow productive pastures. It deals with annual and perennial pastures on dryland and irrigated farms in the above 700 mm rainfall zone and may be used by individual farmers or discussion groups. Input from discussion groups will improve futureeditions of the manual.Farmers frequently need to reseed their pastures. Pastures deteriorate and new, more productive species and cultivars come on to the market. Also improved techniques are developed to tackle land management problems like salinity, waterlogging and acidity. All these situations lead to a reseeding operation.

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Dairy Digest 1994-1995, South Dakota State University Dairy Club Jan 1995

Dairy Digest 1994-1995, South Dakota State University Dairy Club

Dairy Digest

No abstract provided.

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Abnormal Properties Of Milk From Transgenic Mice Expressing Bovine Β-Casein Under Control Of The Bovine Α-Lactalbumin 5' Flanking Region, Rafael Jiménez-Flores, Gregory T. Bleck, Robert D. Bremel Jan 1995

Abnormal Properties Of Milk From Transgenic Mice Expressing Bovine Β-Casein Under Control Of The Bovine Α-Lactalbumin 5' Flanking Region, Rafael Jiménez-Flores, Gregory T. Bleck, Robert D. Bremel

Dairy Science

Transgenic mice produced in this investigation contained the proximal promoter elements, the genomic coding sequence and the 3' flanking region of bovine β-casein and the 5' regulatory elements of bovine α-lactalbumin. Specifically, the gene construct included the TATAA box, CAAT box and polyadenylation signal of bovine β-casein in addition to the 5' regulatory elements of the bovine α-lactalbumin gene. Four lines of transgenic mice were generated; they expressed bovine β-casein in their milk at concentrations of up to 10 mg mL-1. The milk from the transgenic mice tended to be very viscous and a proportion of these mice …

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Influence Of Genetic Variants Of Κ-Casein And Β-Lactoglobulin In Milk On Proteolysis In Cheddar Cheese, G. I. Imafidon, N. Y. Farkye, Phillip S. Tong, V. R. Harwalkar Jan 1995

Influence Of Genetic Variants Of Κ-Casein And Β-Lactoglobulin In Milk On Proteolysis In Cheddar Cheese, G. I. Imafidon, N. Y. Farkye, Phillip S. Tong, V. R. Harwalkar

Dairy Science

No abstract provided.

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Process To Remove Cholesterol From Dairy Products, Thomas Richardson, Rafael Jiménez-Flores Jul 1994

Process To Remove Cholesterol From Dairy Products, Thomas Richardson, Rafael Jiménez-Flores

Dairy Science

The present invention relates to a process for the removal of cholesterol from a processed or unprocessed dairy product, which process comprises: (a) obtaining a processed or unprocessed dairy product containing cholesterol (b) contacting the dairy product at a temperature of between about 35° and 80° C. with an amount of saponin effective to bind up to about 90% of the cholesterol present in the dairy product; (c) contacting a temperature of between about 35° and 80° C the cholesterol: saponin with an effective amount of diatomaceous earth; (d) separating the insoluble cholesterol: saponin/diatomaceous earth by filtration or centrifugation; and …

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1994 Annual Report, Various Authors Jan 1994

1994 Annual Report, Various Authors

Annual Reports

No abstract provided.

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Dairy Digest 1993-1994, South Dakota State University Dairy Club Jan 1994

Dairy Digest 1993-1994, South Dakota State University Dairy Club

Dairy Digest

No abstract provided.

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Awassi Fat Tails : A Chance For Premium Exports, Fiona Sunderman, Michael Johns Jan 1994

Awassi Fat Tails : A Chance For Premium Exports, Fiona Sunderman, Michael Johns

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

Most prople have heard of the Awassi, even if they have never seen one. This unique breed of fat tail sheep, imported into Astralia in 1987, was released from quarantine for commercial development nearly 12 months ago. Its supporters believe Awassis could form the basis of a high-value export industry while replacing imports. Developments over the next few years will test its potential and should result in the Awassi playing an important role in an increasingly diversified Australian farming scene.

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Characteristics Of Milk And Reduced Fat Cheddar Cheese From Cows Fed Extruded Soybeans And Niacin, Matthew Ryan Lentsch Jan 1994

Characteristics Of Milk And Reduced Fat Cheddar Cheese From Cows Fed Extruded Soybeans And Niacin, Matthew Ryan Lentsch

Electronic Theses and Dissertations

Today's consumers are demanding food products that are "low-fat", "reduced fat", "high in -unsaturated fatty acids", and "low cholesterol". This trend in food product selection is at the advice of many health professionals. Current health recommendations are to lower the dietary intake of fat, especially saturated fat. In 1992, total dairy sales accounted for over 10% of total food sales (Milk Industry Foundation, 1993). Since dairy products are perceived as being hypercholesterolemic, a market exists for dairy products which are "lower in fat" and/or "lower in saturated fat". It is said that "consumer perception is marketing reality", and because of …

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1993 Annual Report, Various Authors Jan 1993

1993 Annual Report, Various Authors

Annual Reports

No abstract provided.

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Dairy Digest 1992-1993, South Dakota State University Dairy Club Jan 1993

Dairy Digest 1992-1993, South Dakota State University Dairy Club

Dairy Digest

No abstract provided.

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Biological Action Of Mycotoxins, Roger A. Coulombe Jr. Jan 1993

Biological Action Of Mycotoxins, Roger A. Coulombe Jr.

Animal, Dairy, and Veterinary Science Faculty Publications

Mycotoxins are ubiquitous, mold-produced toxins that contaminate a wide variety of foods and feeds. Ingestion of mycotoxins cause a range of toxic responses, from acute toxicity to long-term or chronic health disorders. Some mycotoxins have caused outbreaks of human toxicoses, and at least one mycotoxin, aflatoxin B1, is a presumed human hepatocarcinogen. As part of a comprehensive effort to curtail the adverse health effects posed by mycotoxins, substantial research has been conducted to determine the mechanism of action of mycotoxins in animals. This review presents some of the current knowledge on the biological action of four diverse classes of mycotoxins—aflatoxin …

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Two-Dimensional Analysis Of Skim Milk Proteins Using Preparative Isoelectric Focusing Followed By Polyacrylamide Gel Electrophoresis, Hye-Hyun Y. Kim, Rafael Jiménez-Flores Oct 1992

Two-Dimensional Analysis Of Skim Milk Proteins Using Preparative Isoelectric Focusing Followed By Polyacrylamide Gel Electrophoresis, Hye-Hyun Y. Kim, Rafael Jiménez-Flores

Dairy Science

A preparative isoelectric focusing (IEF) method was applied to separate skim milk proteins using the Rotofor device in a pH 3-10 gradient containing 4 M urea/1% triton X-100. Each of the 20 fractions obtained from the Rotofor device was then analyzed by polyacrylamide gel electrophoresis (PAGE). Both urea-PAGE and SDS-PAGE were used to separate purified caseins and skim milk resulting in comparable two-dimensional pattern. The major bovine caseins (αs1, αs2, β, κ-casein) were resolved better on urea-PAGE. The αs1- and β -casein were focused at pH ~ 4.5 and 4.8, respectively, whereas αs2 …

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