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Articles 31 - 55 of 55
Full-Text Articles in Life Sciences
Inheritance And Linkage Studies Of Some Mutant Characters In Sugarbeets, Beta Vulgaris L., John R. Stander
Inheritance And Linkage Studies Of Some Mutant Characters In Sugarbeets, Beta Vulgaris L., John R. Stander
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
The inheritance and linkage of chlorina (ch2), virescens (vi4), and a plantain leaf character (PI2PI3) in sugarbeets were studied. Chlorina acted as a simple recessive which confirmed work reported previously. Chlorinas from two sources were found to be identical. Virescens and plantain leaf were found to be different from those reported in the literature. Virescens acted as a simple recessive. Male sterility in the virescent material was of the a1 Mendelian type. Plantain leaf exhibited intermediate inheritance and was found to be controlled by the action of two dominant complementary factors. …
Overwintering Of Erwinia Amylovora Inside Living Host Tissue In Cache Valley, Utah, G. Doyle Morrill
Overwintering Of Erwinia Amylovora Inside Living Host Tissue In Cache Valley, Utah, G. Doyle Morrill
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Experiments were conducted to see if Erwinia amylovora (Burrill) Winslow et al. overwinters inside living host tissue in Utah. Bacteria, collected from apple, pear, mountain ash, chokecherry and Pyracantha, were used in the experiment. Isolates taken from buds and inner bark plated on nutrient yeast dextrose agar, we re tested by serological and bacteriophage techniques. Those showing positive tests were then inoculated into Bartlett pear seedlings to test virulence.
Both virulent and avirulent isolates were isolated from each species of plant in the experiment. Pathogenic bacteria were isolated from diseased tissue near cankers, as well as from apparently healthy inner …
Rennin Content Of Abomasa From Bovine Fetuses, Suk Hoon Pang
Rennin Content Of Abomasa From Bovine Fetuses, Suk Hoon Pang
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Rennet extract is an important commercial enzyme preparation which is indispensable to the cheese making industry, The term "rennet" is used to denote the enzyme system extracted from the fourth stomach (abomasum) of a suckling calf. Most of the enzymatic material in the extract is rennin. It also contains a small amount of pepsin(15) and some other proteolytic enzymes(4). The amount of pepsin in rennet extract appears to depend upon the age of the calves at the time of slaughter(31).
Quality Of Beef Roasts: Electronic Versus Conventional Cooking, Frances Glassett Taylor
Quality Of Beef Roasts: Electronic Versus Conventional Cooking, Frances Glassett Taylor
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
The effect of breed, backfat thickness, and methods of cooking on quality of beef roasts was determined by sensory and objective methods. Arm and rib roasts from Hereford, Shorthorn, Charolais, and Shorthorn-Charolais animals were cooked by several methods.
Roasts of the ninth to twelfth ribs were all dry roasted at 325 Farenheit. Boned and unboned roasts (sixth to eighth ribs) were cooked by conventional and electronic methods. Only significant results are reported herein.
Objective tests using the Warner-Bratzler shear indicated roasts of Shorthorn animals to be the most tender of the four breeds.
Sensory analysis by an experienced panel of …
Effects Of Gamma Radiation In Concurrence With Certain Environmental Conditions On Lethal And Physio-Chemical Responses Of Penicillium Expansum L., Tsong-Wen Chou
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
In vitro investigations were conducted to study the lethal effect of gamma radiation on the fruit spoilage fungus Penicillium expansum under certain environmental conditions, and to study some physio-chemical changes in the fungus induced by the radiation which may be related to the death of the fungus or its ability to invade fruits.
The radiation sensitivity of P. expansum conidia was influenced by such factors as nutritional condition of the post-irradiation media, age of the spores, delayed plating, heat treatment, and chemical sensitizers. Higher survival was obtained when irradiated conidia were plated on Czapek solution agar (sugar-salts medium) than on …
Accounting For Milk Protein In Equivalents By Dye Binding Analysis Of Cheese And Whey, Prahlad H. Patel
Accounting For Milk Protein In Equivalents By Dye Binding Analysis Of Cheese And Whey, Prahlad H. Patel
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Each of thirteen lots of Cheddar cheese was made from 430 lb. of milk, and the protein recovered in the cheese and whey was compared with that in the original milk. Protein determinations on the milk, cheese and whey were made by an acid orange 12 dye binding test, and by Kjeldahl analysis. Similarly fat recovery was determined by using the Babcock fat test on milk, the modified Babcock test on cheese, and the Mojonnier test on whey. The total weight recovered as cheese and whey was 99 ± .6% by Kjeldahl analysis and 97.7 ± .6% by the dye …
Development Of A Low-Fat Spread, Clair L. Hicks
Development Of A Low-Fat Spread, Clair L. Hicks
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
A stable low-fat water-in-oil emulsion was satisfactorily prepared from milk-fat under laboratory conditions. The best product contained 40 per cent fat, 56.8-57.3 per cent water, 0.8 per cent sodium carboxymethyl cellulose, 0.7-1.2 per cent milk solids-non-fat, and 1.2 percent salt. The spread was prepared equally well from butter or high test cream. When the product was made from cream (containing 74 per cent milk-fat) it was necessary to convert most of the globular fat to free fat prior to forming an emulsion. Globular fat in cream was successfully changed to free fat by homogenization at 2500 pounds per square inch …
Let's Control Swarming, William P. Nye, George F. Knowlton
Let's Control Swarming, William P. Nye, George F. Knowlton
All PIRU Publications
No abstract provided.
Aggressive Man And Aggressive Beast, Allen W. Stokes
Aggressive Man And Aggressive Beast, Allen W. Stokes
Faculty Honor Lectures
Whether man can live in harmeny with his environment depends in great measure en his ability to' live with his fellew man. Can man learn to' engineer human seciety in time to' prevent a helecaust? Mere specifically, can we learn to' prevent aggressien er to' channel it harmlessly? The ethelegist leeks upen man's behavier as just part ef the tetal spectrum ef animal behavier. Therefere, much of what we learn abeut the behavier ef lewer animals sheuld relate to' human behavier.
Aggressien is in the headlines every day, and in the past few years there has been a 'Steady stream …
A National Program Of Research For Bees And Other Pollinating Insects And Insects Affecting Man, U.S. Department Of Agriculture
A National Program Of Research For Bees And Other Pollinating Insects And Insects Affecting Man, U.S. Department Of Agriculture
An
The United States Department of Agriculture and State Agricultural Experiment Stations are continuing comprehensive planning of research. This report is a part of this joint research planning and was prepared under recommendation 2 (page 204, paragraph 3) of the National Program of Research for Agriculture.
The Biology And External Morphology Of Bees With A Synopsis Of The Genera Of North-Western America, W. P. Stephen, George E. Bohart, P. F. Torchio
The Biology And External Morphology Of Bees With A Synopsis Of The Genera Of North-Western America, W. P. Stephen, George E. Bohart, P. F. Torchio
All PIRU Publications
No abstract provided.
A New Species Of Dufourea From California *Hymenoptera: Halictidae), George E. Bohart
A New Species Of Dufourea From California *Hymenoptera: Halictidae), George E. Bohart
All PIRU Publications
No abstract provided.
Phoretic Behavior Of Four Species Of Alkali Bee Mites As Influenced By Season And Host Sex, Earle A. Cross, George E. Bohart
Phoretic Behavior Of Four Species Of Alkali Bee Mites As Influenced By Season And Host Sex, Earle A. Cross, George E. Bohart
All PIRU Publications
No abstract provided.
Dolichopodidae (Diptera) And Braconidae (Hymenoptera) Of Curlew Valley, G. F. Knowlton, W.J. Hanson, G.E. Bohart
Dolichopodidae (Diptera) And Braconidae (Hymenoptera) Of Curlew Valley, G. F. Knowlton, W.J. Hanson, G.E. Bohart
Memorandum
No abstract provided.
Selective Breeding Of Honeybees For Alfalfa Pollen Collection: Sixth Generation And Outcrosses, O. Mackensen, William P. Nye
Selective Breeding Of Honeybees For Alfalfa Pollen Collection: Sixth Generation And Outcrosses, O. Mackensen, William P. Nye
All PIRU Publications
No abstract provided.
The Effect Of Livestock Grazing On An Aspen Forest Community, Ronald G. Weatherill, Lloyd B. Keith
The Effect Of Livestock Grazing On An Aspen Forest Community, Ronald G. Weatherill, Lloyd B. Keith
Aspen Bibliography
During 1967-68 a study was conducted near Rochester, Alberta, to evaluate the effect of grazing by domestic livestock on an aspen (Populus tremuloides) forest community and on some common wildlife populations therein.
Full-Tree Harvesting System Aids Forest Management, Z.A. Zasada, J.C. Tappeiner
Full-Tree Harvesting System Aids Forest Management, Z.A. Zasada, J.C. Tappeiner
Aspen Bibliography
No abstract provided.
The Effects Of Some Silvicultural And Soil Treatments On Aspen (Populus Tremuloides Michx.) Reproduction In Northern Utah, Calvin O. Baker
The Effects Of Some Silvicultural And Soil Treatments On Aspen (Populus Tremuloides Michx.) Reproduction In Northern Utah, Calvin O. Baker
Aspen Bibliography
No abstract provided.
The Effect Of Cattle, Sheep, And Other Factors On Aspen (Populus Tremuloides) Reproduction After Clear-Cut Logging In Southern Utah, Paul A. Lucas
The Effect Of Cattle, Sheep, And Other Factors On Aspen (Populus Tremuloides) Reproduction After Clear-Cut Logging In Southern Utah, Paul A. Lucas
Aspen Bibliography
No abstract provided.
Populus: A Bibliography Of World Literature, 1854-1963, R.E. Farmer Jr., J.S. Mcknight
Populus: A Bibliography Of World Literature, 1854-1963, R.E. Farmer Jr., J.S. Mcknight
Aspen Bibliography
No abstract provided.
The Effect Of Reduced Extractive Content On The Burning Rate Of Aspen Leaves, C.W. Philpot
The Effect Of Reduced Extractive Content On The Burning Rate Of Aspen Leaves, C.W. Philpot
Aspen Bibliography
No abstract provided.
Prescribed Burning Weather In Minnesota, Rodney Sando
Prescribed Burning Weather In Minnesota, Rodney Sando
Aspen Bibliography
No abstract provided.
Exclosures And Natural Areas On Rangelands In Utah, W. A. Laycock
Exclosures And Natural Areas On Rangelands In Utah, W. A. Laycock
Aspen Bibliography
No abstract provided.
Aspen Grove Use By Deer, Elk, And Cattle In Southwestern Coniferous Forests, Hudson G. Reynolds
Aspen Grove Use By Deer, Elk, And Cattle In Southwestern Coniferous Forests, Hudson G. Reynolds
Aspen Bibliography
Aspen groves within mixed conifer forests produce more herbaceous understory than adjacent forest. Thinning aspen groves improves herbaceous understory and aspen regeneration. Higher deer and cattle use of aspen groves is associated with the greater abundance of understory vegetation.
Spectral Infra-Red Reflection Measurements From Natural And Treated Aspen Forests, Frank W. Haws, Ralph Briscoe, Allan Steed
Spectral Infra-Red Reflection Measurements From Natural And Treated Aspen Forests, Frank W. Haws, Ralph Briscoe, Allan Steed
Aspen Bibliography
No abstract provided.