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Louisiana Agriculture Magazine, Fall 1970, Lsu Agricultural Experiment Station

Louisiana Agriculture

No abstract provided.

Dialysis Studies Of The K+ Binding Capacity Of Physarum Polycephalum, Claude Nations

Journal of the Graduate Research Center

Anderson (1964) has observed that migrating plasmodia of the slime mold, Physarum polycephalum, maintain a higher concentration of K+ in the region of the advancing front than in the posterior trailing region. He has also found that most of the Na- but little of the K+ in the posterior region can be removed by flushing water over the organism. Previous work by Anderson (1962) had revealed that alcohol precipitates prepared from plasmodial homogenates contain considerable quantities of K- which cannot be removed by washing. Based on these discoveries he has suggested that K+, but not Na+ is closely associated with …

Adrenal Corticosteroidogenesis And Hypothyroidsm: Effect Of Long-Term Treatment With P-Aminobenzoic Acid, John L. Mccarthy, Linda W. Laury

Journal of the Graduate Research Center

The relationship between induced hypothyroidism and adrenal involution has been studied by a variety of approaches in an attempt to elucidate the physiological basis between the events. McCarthy et al. (1959) reported on an investigation of feeding several antithyroidal agents to rats to study adrenal gland involution. While adrenal involution did occur following treatment with several of the goitrogens, only in one case was there a difference in peripheral plasma adrenal corticoid levels. In rats fed p-aminobenzoic acid (PABA) for 12 weeks, peripheral levels of corticosterone (B) decreased and levels of a Porter-Silber positive chromogen increased markedly. Work from the …

The In Utero Development Of Mouse Embryos After Cultivation In Vitro From Two-Cell To Blastocyst In 17b - Estradiol Treated Medium, Harley J. Schneider Jr.

Morehead State Theses and Dissertations

A thesis presented to the faculty of the School of Sciences and Mathematics at Morehead state University in partial fulfillment of the requirements for the Degree of Master of Science in Biology by Harley J. Schneider, Jr. on August 27, 1970.

Comparisons Of The Antigenic Relationships Of Pollen Extracts From Ambrosia Artemisaefolia, Ambrosia Elatior, Ambrosia Psilostachya And Ambrosia Trifida, James W. Meares

Biology ETDs

The antigenic relationships of Ambrosia artemisaefolia, Ambrosia elatior, Ambrosia psilostachya, and Ambrosia trifida were studied using the techniques of gel diffusion and pas­sive cutaneous anaphylaxis. Ten gram samples of defatted pollen were extracted for 7 2 hours with Coca's solution.

Each pollen extract was standardized on the basis of total nitrogen content per ml of extract using the Kjeldahl method. Antisera were prepared by injections of the pollen extract in Freund' s complete adjuvant. Rabbits were immunized subcutaneously against each pollen extract and antisera were collected five to six weeks after immunization. Gel diffusion analysis was performed by first pouring …

Asexual Reproduction In Planaria Characteristics Of The Inhibitor(S), Linda Gail Sheffield

Theses and Dissertations

A study was made of the postulated fission-inhibiting substance located in the cephalic region of Dugesia dorotocephala. Rearing decapitated planaria in four different concentrations (25, 50, 75 or 100 ug/ml) of head or whole body extract resulted in a positive correlation between the inhibition of fission rate and the concentration of extract. The difference in inhibitory activity between the two types of extracts was three percent at maximum. The inhibitory substance was partially inactivated at 60° C. There was a direct correlation between the length of time that the extract was heated and the inactivation of inhibitor. The active substance …

Effects Of X-Irradiation On The Brain Of White Rats, Bernell K. Dalley

Theses and Dissertations

With the advent of the atomic age, a great deal of attention has been given to the effects of radiation of various types on the living organism. Some emphasis was placed also on the particular effects damaging radiation has on the central nervous system. Of particular importance was the dis -covery of the high resistance to irradiation exhibited by the central nervous system, and the observation of a latent period after exposure, during which the individual appears normal, followed by deterioration and death. Explan - ations of this unique reaction have caused some controversy and, currently, one of two theories …

Infectivity And Development Of Trichinella Spiralis In Germ-Free, Monocontaminated And Conventional Mice, Daulat Sitanggang

Loma Linda University Electronic Theses, Dissertations & Projects

The purpose of the experiment was to compare the development of Trichinella spiralis in germ-free, Lactobacillus casei monocontaminated, Escherichia coli monocontaminated and conventional mice. The criteria used in the experiments were the recovery of adults and larvae of T. spiralis after 72 hours and one month post-infection, respectively. which gave an indication of the effects of no bacteria or only a certain, single species of bacterium on the development of this nematode in mice.

Germ-free T. spiralis larvae were obtained by washing them several times with sterile normal saline, and treatment with antibiotics. The gavaging procedure was done without anesthetization …

Molecular Weight Determinations Of Some Salmonella Potsdam Bacteriophage Dna's, Winston H. Richards

Loma Linda University Electronic Theses, Dissertations & Projects

Two group A phages, P9c/2 and P4/2, were studied. Their density, sedimentation velocity, and biochemical properties were compared. Their densities were determined by density gradient centrifugation in 38.3% cesium chloride. Sedimentation velocity was used to determine their molecular weights. To accomplish this, the DNA of P9c/2 and P4/2 was labeled with tritium and T₂ DNA, labeled with ³²P, was used as a standard. The DNA of P9c/2 and P4/2 was separately mixed with T₂ DNA and centrifuged in a 0-15% sucrose gradient. The molecular weights were calculated using the formula D₂/D₁= (M_{2 …}

A Comparative Study Of The Head And Thoracic Osteology And Myology Of The Skinks, Eumeces Gilberti Van Denburgh And Eumeces Skiltonianus (Baird And Girard), David F. Nash

Theses and Dissertations

Further clarification of the taxonomic and phylogenetic relationships of Eumeces gilberti and Eumeces skiltonianus is achieved by the comparisons of the skull, mandible elements, and the anterior myology of these two species. Figures are provided to compliment the descriptions. The study confirms their close relationship and few differences are observed. E. skiltonianus, however, appears to have more anatomical plasticity which suggests that E. gilberti may have arisen from the former.

Reactions Of Pollen-Pistil Combinations In Vitro & Their Relationships To Compatibility In Alfalfa, Emerson Shipe

Masters Theses & Specialist Projects

Reactions of in vitro pollen-pistil combinations were studied and related to compatibility differences in Buffalo alfalfa Medicago sativa L.) at Western Kentucky University, Bowling Green. Pollen-pistil combinations were made at random among a number of alfalfa plants in 1968 (Experiment I). Pollen tube elongation varied significantly when -4 pollen from the same plant was placed on agar media containing pistils from different plants. Three of four plants for which intra-plant combinations (pollen and pistils from same plants) were made 1,ad tube lengths significantly shorter than those measured for inter-plant combinations (pollen and pistils from different plants).

Similar in vitro pollen-pistil …

South Dakota Farm & Home Research, Agricultural Experiment Station, South Dakota State University

South Dakota Farm and Home Research: 1949 -1998

New Office-Lab Building at Southeast Farm [p] 3
Comparing Hay Making Methods [p] 4
Understanding Dutch Elm Disease [p] 8
Super-Layers: More Eggs, Smaller Chickens [p] 13
Adjustments in South Dakota Auction [p] 14
50-Ton-an-Acre Potato Yields [p] 16
For the Record [p] 17
Zinc Supplements for Dairy Cattle [p] 18
Calves Prefer Solid Floor, Sawdust Bedding [p] 20
Oat Yield Losses Due to Weed Control sprays [p] 22
Put Losses to Work If You Can’t Win ’em All [p] 23
Effects of Environment on Beef Cattle [p] 24
Carpet Care, Selection [p] 28
Freeze-Dried Wheat—Potential New Product [p] 32 …

Louisiana Agriculture Magazine, Summer 1970, Lsu Agricultural Experiment Station

Louisiana Agriculture

No abstract provided.

Double Contrast Arthrography Of The Knee, Peter C. Larowe, Robert S. Ormond, Edwin Guise

Henry Ford Hospital Medical Journal

Arthrography is a safe and relatively simple diagnostic procedure which provides an accurate and graphic preoperative means of defining pathology of the knee. In those cases where the expeditious evaluation and diagnosis of knee injury are of prime importance, ie, the athlete and industrial compensation case, arthrography provides a significant contribution. The clinical pathological features, salient anatomy and technic of study of internal derangements of the knee are discussed. Selected double contrast arthrograms illustrate normal and abnormal findings. Arthrotomies were performed in 20 of the 32 patients in this study with a positive arthrogram-arthrotomy correlation of 85%.

Genetic And Metabolic Controls For Sulfate Metabolism In Neurospora Crassa: Isolation And Study Of Chromate-Resistant And Sulfate Transport-Negative Mutants, George A. Marzluf

Biological Sciences Faculty Research and Publications

Mutants of Neurospora resistant to chromate were selected and all were found to map at a single genetic locus designated as cys-13. The chromate-resistant mutants grow at a wild-type rate on minimal media but are partially deficient in the transport of inorganic sulfate, especially during the conidial stage. An unlinked mutant, cys-14, is sensitive to chromate but transports sulfate during the mycelial stage at only 25% of the wild-type rate; cys-14 also grows at a fully wild-type rate on minimal media. The double-mutant strain, cys-13;cys-14, cannot utilize inorganic sulfate for growth and completely lacks the capacity to …

Growth Of Staphylococcus Aureus On Two Selective Media With Special Reference To Cultural Techniques For Growing S. Aureus On Selenite Egg Yolk Agar, Karren Littell

Masters Theses & Specialist Projects

An X-ray diffraction powder photograph shows a series of lines for each of which a measurement can be made and transformed into the interplanar d value (15). Lines were obtained by the analysis of precipitates from BP plates, but no lines could be obtained from the precipitate collected from SeEy plates even when the sample was exposed to the X-rays for a 20-hr period. The lines from the tellurite sample provided d values that corresponded to neither any known tellurium compound nor to elemental tellurium. These results do not agree with those of many investigators (1, 6, 11, 19, 22) …

Agricultural Experiment Station News May 1970

Agricultural Research Division: News and Annual Reports

CONTENTS:
FROM THE DIRECTOR'S DESK
MULTIDISCIPLINE RESEARCH
PERSONNEL ACTIONS
GRANTS AND CONTRACTS
GENERAL NOTES
NEBRASKA AGRICULTURAL EXPERIMENT STATION PUBLICATIONS – May 1970
BULLETINS PRINTED

The Effects Of Euploid Changes In Chromosome Number On Various Physiological Factors In Tomatoes, Barley And Rye, Larry Wayne Peterson

Theses and Dissertations

Leaf tissue of diploid, triploid, and tetraploid tomatoes (var. UF-36) and diploid and tetraploid barley (var. Steel and Midsummer) were analyzed for total chlorophyll, soluble protein, dry weight, ribulose-1,5-diphosphate carboxylase, phosphoribulokinase, and peroxidase. Polyploidy caused a slight increase of all factors in Midsummer rye, had a variable effect on Steel rye and Everest barley, and caused a reduction in tomatoes and Barbless barley when the factors were determined on a fresh weight basis. In tomatoes, if the ribulose-1,5-diphosphate carboxylase activity was determined on protein content, dry weight or cell number the tetraploid form had higher activity than the diploid form. …

The Effects Of Formaldehyde On The Frequency Of Reversion Of The White-Ivory Mutant Of Drosophila Melanogaster, Ruth Ellen D. Wood

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This study is an analysis of the effects of formaldehyde, a chemical which is both recombinogenic and mutagenic, on white-ivory (wⁱ) a highly mutable allele of the white locus of Drosophila. Formaldehyde is shown to significantly increase the reversion frequency of wⁱ. The results of this investigation differ from earlier observations in three respects: (1) there is a positive correlation between RNA (ribonucleic acid) concentration and reversion frequency in the presence of formaldehyde, but reversion does not appear to be totally RNA dependent; (2) female germ cells are more sensitive than those of the male; …

Development Of A Whey-Based Lactic Culture Medium Capable Of Bacteriophage Inhibition, Chao Tung Cheng

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

A whey product has been formulated for use as a lactic starter medium. Phosphate-treated whey medium (PWM) has been shown to support growth of lactic cultures and prevent phage proliferation. Comparisons were made of a commercial phage inhibitory medium (PIM), reconstituted non-fat dry milk (NDM) and PWM. PWM inhibited all phages tested and stimulated starter growth. PWM was not as stimulating as PIM but was better than NDM. Good Cheddar cheese has been made using PWM. PWM is more economical than PIM but NDM is the most economical one if cheese yield is considered.

Factors Influencing The Performance Of Bromoxynil 4(2,4-Db), Or A Companion Crop For Weed Control In Seedling Alfalfa, Ferrin D. Leavitt

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Some of the factors influencing the performance of bromoxynil, 4(2,4-DB), or a companion crop for weed control in seedling alfalfa were studied in the greenhouse and at field locations in Farmington and Logan, Utah. The effect of application rate, stage of growth, temperature, and soil moisture on the phytotoxicity of bromoxynil and 4(2,4-DB) to alfalfa and weeds were studied.

Alfalfa yields were increased by 4(2,4-DB) at all rates and stages of application. All rates and stages of bromoxynil treatment except the one-fourth pound per acre three to four trifoliate application resulted in alfalfa yields below that of the control.

The …

Growth Of Eimeria Alabamensis From Cattle In Vitro And The Changes In Fine Structure Associated With Schizogony, J. Robert Sampson

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Monolayer primary cultures of cells from bovine embryonic intestine (BEint), kidney (BEK), spleen (BES), and thyroid (BET) and cell line cultures of embryonic bovine trachea ( EBTr) and synovium (BESy)as well as established cell line cultures of Madin-Darby bovine kidney (MDBK), human intestine (Int 407), and Syrian hamster kidney (BHK-21) were inoculated with freshly excysted sporozoites of Eimeria alabamensis and observed for 4 days. Sporozoites penetrated all cell types during the first 24 hours in culture. Numerous intracellular sporozoites, trophozoites, and binucleate schizonts were seen in all cell cultures except Int 407. The best development occurred in BES and MDBK …

82nd Session Of The Iowa Academy Of Science, April 24-25, 1970, Iowa Academy Of Science

Iowa Academy of Science Documents

No abstract provided.

Agricultural Experiment Station News April 1970

Agricultural Research Division: News and Annual Reports

CONTENTS:
FROM THE DIRECTORS OFFICE
THE NEW SOUTH CENTRAL STATION
PERSONNEL ACTIONS
GENERAL NOTES
GRANTS AND CONTRACTS
AGRICULTURAL EXPERIMENT STATION PUBUCATIONS - April 1970

Louisiana Agriculture Magazine, Spring 1970, Lsu Agricultural Experiment Station

Louisiana Agriculture

No abstract provided.

Quantitation Of Aortic Valvular Insufficiency Using Radioactive Tracers: An Experimental Study In Vitro, Frank J. Hildner, William R. Pierson, Bernard Weinstock, Ellet H. Drake, Robert S. Ormond

Henry Ford Hospital Medical Journal

A method has been developed in vitro for quantitation of aortic valvular insufficiency (Al) based on the use of ladioactive traceis lo genei-ate graphic recordings of the movement of blood out of the ventricle and back again. The regurgitant fraction of stroke volume (peirent of Al) is read from this recording. The method was evaluated in a mechanical heart model by comparing Al values read from the istope recordings and Al values determined volumetrically. The recordings gave excellent agreement with the volumetric results (Corr. Coeff. .9). These in vitro results are of such quality that clinical trials seem justified.

Complications Of Pulmonary Angiography, D. T. Anbe, E. H. Drake

Henry Ford Hospital Medical Journal

Although data are available indicating the complication rates for routine cardiac catheterization, information has been lacking on the morbidity of pulmonary angiography in symptomatic patients. This retrospective study was undertaken to assess the "risks" of this procedure, by analyzing all cases undergoing pulmonary angiography from June 10, 1964. to December 31, 1967. Only two deaths were considered to be causally related to the pulmonary angiogram, a mortality rate of 1.4%. The overall complication rate was 15%. There was no correlation of the complications with the average age, or the concentration of the Hypaque used. There was a correlation between complications …

Algal Growth And Decomposition: Effects On Water Quality, Edward G. Foree, John S. Tapp Jr.

KWRRI Research Reports

The chemical composition of algae grown in batch culture depends mainly on environmental conditions, nutrient availability, presence of predators, cell age, and species. The effects of nutrient availability and cell age on the composition of three unialgal cultures (algae + bacteria) and one hetergeneous culture (algae + bacteria + microscopic animals) were evaluated. The cultures were grown in batch culture under both nutrient-abundant and nutrient deficient conditions and the changes in compositions were observed. Luxurious uptake where nutrients are incorporated into cellular protoplasm at levels greater than those necessary for growth, and super-luxurious uptake, where some nutrients are stored rather …

Supplying Wood Products For More People - A Challenge To The Forest Industry, John A. Segur, F. Bruce Lamb, Basil E. Allen

Yale School of the Environment Bulletin Series

No abstract provided.

Immunodiffusion And Immunoelectrophoretic Studies On Trypanosoma Lewisi (Kent) During The Course Of An Infection In The Albino Rat, Rattus Rattus, Carol Louise Perkins Drew

University of the Pacific Theses and Dissertations

Immunoelectrophoresis revealed an antigen-antibody response between 4 day metabolic products and 8, 12 and 16 day sera and between 4 day trypanosomal extract and 16 day serum.

Metabolic products from trypanosomes incubated at room temperature do not appear to be antigenic.

The limitations of immunodiffusion are discussed in reference to the results. It is suggested that some of the antibodies to metabolic products may be of the precipitating type while others are not.

Since a faint reaction also occurred between 4 day trypanosomal extract and 16 day serum, it may be concluded that metabolic products contribute to only a portion …