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An Ecological Study Of Ditylenchus Dipsaci (Kuhn) Filipjev. In A Field Of Alfalfa, Shu-Ten Tseng

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Ditylenchus dipsaci (Kuhn) Filipjev. is one of the most destructive nematodes to crop plants. It attacks and damages more than 300 species of cultivated and uncultivated plants. The nematode can be differentiated into many races, each of them having a preference for a group or even a single plant species.

Alfalfa stem nematode is one of the races in this species which attacks the above ground portion of alfalfa but does not infest the roots. Larvae of this nematode may migrate from the plant tissue to soil in moist conditions. These nematodes migrate actively to nearby plants or are carried …

The Complex Formation Of Silver Ion With Ribonucleic Acid, Guanosine, Inosine And Related Compounds And Peroxidase-Like Activity Of A Haemundecapeptide Prepared From Horse Heart Cytochrome C, José Angel Reinosa

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The importance of nucleic acids in plant and animal cells as carriers of genetic information and as protein biosynthesis agents is well recognized. It is also known that nucleic acid is a component of all viruses.

Takahashi (45) and Fraenkel-Conrat (16) demonstrated that the protein component of tobacco mosaic virus is non-infectious to the host plant, although it is identical to the original virus morphologically. The virus ribonucleic acid (RNA) alone was infectious, however.

Deoxyribonucleic acid (DNA), which is present in chromosomes, displays a very specific function. The chromosome long has been accepted as the carrier of the hereditary unit, …

Iowa Junior Academy Of Science: The Thirty-Fourth Convention, April 15 And 16, 1966, Iowa Academy Of Science

Iowa Academy of Science Documents

No abstract provided.

Dermacentor Andersoni And Rocky Mountain Spotted Fever In National Forest Recreational Sites Of Utah, C. Selby Herrin

Theses and Dissertations

The objectives of this study were to determine (1) the prevalence of adult ticks of Dermacentor andersoni in national forest recreational sites of Utah, and (2) the incidence of spotted fever rickettsia, Rickettsia rickettsii, in the ticks of these areas. With the use of a white flannel cloth, 358 adult D. andersoni (135 males and 223 females) were collected from 48 recreational sites during the spring and summer of 1964. Ticks from each collection were put in pools, preserved in non-fat skim milk at -30° C, and subsequently tested for the presence of spotted fever rickettsia by guinea pig inoculations. …

Forestry Bulletin No. 8: Soil Moisture And Soil Temperature Under A Post Oak-Shortleaf Pine Stand, G. Schneider, J. J. Stransky

Forestry Bulletins No. 1-25, 1957-1972

"This paper reports moisture and temperature observations in the surface 18 inches of soil under an east Texas post oak (Quercus stellata Wangenh.) - shortleaf pine (Pinus echinata Mill.) stand throughout a 4 year period."

Forestry Bulletin No. 9: Silviculture Of Shortleaf Pine, Laurence C. Walker, Harry V. Wiant Jr

Forestry Bulletins No. 1-25, 1957-1972

"Nowhere is silviculture more intensively practiced than in the southern United States exempt, perhaps, in certain European nations. This is because of the tremendous demands upon the forests for fiber in a region of optimum climatic characteristics for rapid growth of valuable species. In meeting these demands, management instructs its foresters to shift their efforts into high gear."

A Comparative Study Of The Effects Of Starvation On Two Mating Types Of Tetrahymena Pyriformis, Carolyn Gene Mohler

Theses & Honors Papers

The initial observable event in protozoan conjugation is the union, by pairs, of cells belonging to opposite mating types. The union does not occur immediately after mixing appropriate mating types; a starvation-initiated period (the refractory period) of approximately 4 hours is prerequisite for mating between the two mating types of variety 1, Tetrahymena pyriformis employed in this study.

The results of this study indicate that water-diffusible mating substances are produced by the mating types during the refractory period. The production of these substances is initiated by placing the cells under starvation conditions and not by contacts among cells of opposite …

South Dakota Farm And Home Research, Agricultural Experiment Station

South Dakota Farm and Home Research: 1949 -1998

Contents:
Chemical Control of Wheat Stem and Leaf Rust [p] 4
Cow-Calf Operators' Adjustments in Production [p] 7
High Quality Paper, A Flax Straw By-Product [p] 9
Wear and Cleaning of Fabric to Fabric Laminates [p] 11
SD 230 - A New Corn Hybrid [p] 13
The Ruminal Experiment - Where a Population Explosion (Microbiological) is Needed [p] 14
South Dakota's Hog-Pork Industry [p] 18
An Organic Trench That lets Moisture and Air (and ROOTS) Go Through Claypan Soils [p] 22
Maize Dwarf Mosaic Spreads Northwestward [p] 24
Bait Fish - A New Industry? [p] 26
Insect Outlook: Watch for …

Whole Issue Nebraska Bird Review (April 1966) 34(2)

Nebraska Bird Review

Table of Contents

Treasurer's Report - 1965 ................................................................ 22

Progress Report on the Prairie Grouse Nesting Study in the Nebraska Sandhills ............................................................ 23

Nesting Birds of the Crescent Lake National Wildlife Refuge .... 31

1965 Christmas Count ............................................ ............................. 35

Excerpts from Letters ............................................................................. 39

Nesting Report - 1965 ........................................................................ 41

Western Kingbird Nesting in the Nebraska Sandhills ................ 44

Hooded Warbler in Logan County ...................................... 44

Nesting Birds Of The Crescent Lake National Wildlife Refuge, Roger S. Sharpe, Raphael Richard Payne

Nebraska Bird Review

The Crescent Lake National Wildlife Refuge is located in Garden County near the heart of the Nebraska Sandhill Lakes Region. This country is principally rolling mid-grass prairie, the hills reaching a height of as much as 200 feet above the wet meadows. A good portion of the refuge's 46,000 acres consists of these lush meadows which are pocked by marshes, potholes and small lakes. Natural drainage from the surrounding sandhills and springs in the basins feed these water bodies.

The lakes are quite shallow, reaching a depth of perhaps 15 feet. They are alkaline yet are not so highly basic …

1966 Little International Agricultural Exposition Catalog, Little International Agricultural Exposition South Dakota State University

Little International "Little I" Agricultural Exposition Catalogs

No abstract provided.

Radiology In This Century, Howard P. Doub

Henry Ford Hospital Medical Journal

No abstract provided.

Bone As A Physiological Tool, Harold M. Frost

Henry Ford Hospital Medical Journal

No abstract provided.

Some Historical Reminders In Hospitalization, Thos. J. Heldt

Henry Ford Hospital Medical Journal

No abstract provided.

My Friend, Dr. Roy D. Mcclure, Jean Paul Pratt

Henry Ford Hospital Medical Journal

No abstract provided.

Studies On The Helminth Fauna Of Alaska. Xliv. Revision Of Ogmogaster Jägerskiöld, 1891, With A Description Of O. Pentalineatus Sp. N. (Trematoda: Notocotylidae), Robert L. Rausch, Francis H. Fay

Harold W. Manter Laboratory of Parasitology: Faculty Publications

Discrepant conclusions in the literature concerning the specific distinction of the two spe- cies assigned to the genus Ogmogaster Jägerskiöld, 1891, necessitated a reevaluation of the taxonomic characters used in separating these trematodes. Study of material from baleen whales from North Pacific waters and from baleen whales and lobodont pinnipeds from the southern hemisphere disclosed the existence of two species which can be distinguished by consistent differences in numbers of ventral ridges, ratio of length of cirrus sac to length of body, and by other morphological characters. Since the original description of O. plicatus (Creplin, 1829) does not permit certain …

Index To The Genera, Subgenera, And Sections Of The Pyrrhophyta, Alfred R. Loeblich Jr, Alfred R. Loeblich Iii

Studies in Tropical Oceanography

No abstract provided.

Third Bibliography And Index For The Philosophy Of Geology, Claude C. Albritton Jr.

Journal of the Graduate Research Center

The following bibliography and index have the same scope and structure as the two preceding issues. The categories of writings here cited are also the same as listed in the front portion of the second bibliography.

Annual And Season Weight Changes In A Thirteen-Lined Ground Squirrel Population, Itasca State Park, Minnesota, Bonnie M. Hohn, William H. Marshall

Journal of the Minnesota Academy of Science

The ecology of the thirteen-lined ground squirrel (Citellus tridecemlineotus) has been under investigation since 1954 on the grounds of the University of Minnesota Forestry and Biological Station located in Itasca State Park, Minnesota. Over the 11-year period, data have been collected on individuals of this small, relatively isolated, population. Studies of population dynamics, movements, activity patterns, and weights have been stressed, chiefly during the three summer months of June, July, and August. In 1964, the senior author carried out field work for the entire season from April 30 to September 14.

A Preliminary Report On The Comparative Morphology Of The Shoot Apex Of Isoetes Macrospora Dur. And Some Effects Of Experimentally Applied Indole-3-Acetic Acid And Gibberellic Acid, Daniel R. Zinda

Journal of the Minnesota Academy of Science

Isoetes macrospora Dur. was found growing in 20 inches to 4 ft. of water in several sandy-bottomed lakes in Itasca County, Minnesota. The pH of the lakes was about 6 and the characteristic tree species of the immediate shorelines were: Thuja occidentalis, Pinus resinosa, Abies balsomea, Populus tremuloides, and Betula papyrifera. Experimental and normal plants were grown submerged in 1-liler beakers in the greenhouse for the 2-week experimental period. The normal shoot apex of /. macrospora is described as having three zones. Zone I, the metrameristem, consists of the superficial layer of initials which divide usually by anticlinal divisions and …

Compartmentation Of Glutamic Acid Metabolism In Brain Slices / Donald D. Clarke And Soll Berl Columbia Univ. School Of Medicine, N. Y. C., Donald Dudley Clarke Phd, Soll Berl

Chemistry Faculty Publications

The presence, in brain, of metabolic pools of glutamic acid have been demonstrated in vivo but not in tissue slices. Brain tissue slices prepared in the cold in Ringer's-bicarbonate containing 1% glucose and stored in an ice bath go not show compartmentation when incubated at 37 (10-20 min.) in a similar medium which contains tracer quantities of C aspartic acid, U.l.; the specific activity of glutamine remains considerably below that of glutamic acid. If such tissue slices are pre-incubated at 37° for 10 min. and then transferred to fresh medium containing radioactive tracer, after 10 min. at 37 , the …

Automation Of The Assay For Transglutaminase / Donald D. Clarke And Ruth Nicklas, Donald Dudley Clarke Phd, Ruth Nicklas

Chemistry Faculty Publications

Transglutaminase is an enzyme which catalyzes the Ca++-activated incorporation of amines into proteins. More detailed studies of the action of this enzyme showed that the incorporated amines displaced ammonia, and that only L-glutamine and not asparagine residues in the protein or peptide are substrates for this enzyme. This enzyme will not act on free glutamine, hence is not to be confused with glutaminase or transamidases which will act on free glutamine as a substrate. A variety of substituted glutamine peptides have been found to have substrate activity for this enzyme. Neidle and Acs, and more recently Folk and Cole, have …

Investigations On Lignins And Lignification Pt. Xxxi Characterization Of Metasequoia 'Milled-Wood' Lignin / By Michael J. Reale, Donald D. Clarke, Walter J. Schubert And F. F. Nord Laboratory Of Organic Chemistry And Enzymology), Fordham University, Bronx, New York, Michael J. Reale, Donald Dudley Clarke Phd, Walter J. Schubert, Friedrich F. Nord

Chemistry Faculty Publications

A young Metasequoia tree was debarked; its branches and heartwood were removed. The branches, sapwood and heartwood were separately ground to 8o mesh and air-dried. The moisture and lignin contents of these were determined. "Milled-wood" lignin was isolated from the sapwood sawdust, and was characterized by means of its ultraviolet and infrared absorption spectra. As a means of determining the empirical formula and the number of certain functional groups present in this lignin, an acetylated derivative and a phenylhydrazone were prepared. These were also studied spectroscopically. Elemental, methoxyl and acetoxyl analyses were performed on the original lignin and on its …

Electron Capture Properties Of Halogenated Amine Derivatives / By Donald D. Clarke, Sherwin Wilk, And Stanley E. Gitlow, Donald Dudley Clarke Phd, Sherwin Wilk, Stanley E. Gitlow

Chemistry Faculty Publications

The use of gas-liquid chromatography (G.L.C.) for the analysis of amines of biological interest is currently under investigation in our laboratory. An intensive study of the chromatographic properties of a number of derivatives was presented by VandenHeuvel et al. (1), and this laboratory in a short communication reported on the possible use of heptafluorobutyrylated amine derivatives (2). As was noted in this early communication, sensitivity considerations must maintain priority in any proposed assay because of the extremely small quantities of these compounds present in biological fluids. For this reason, we have chosen to employ the electron capture detector (3). Trifluoroacetyl …

Genetic And Taxonomic Studies In Gilia. Xiii. The Gilia Laciniata Group, Verne Grant

Aliso: A Journal of Systematic and Floristic Botany

No abstract provided.

Ecological Studies Of Blue Grama Grass (Bouteloua Gracilis), F. W. Albertson, D. A. Riegel, Gerald W. Tomanek

Fort Hays Studies Series

Blue grama grass (Bouteloua gracilis) was selected for detailed description here because of its wide distribution and importance throughout the Great Plains Region in the United States.

Growth Rates At Various Temperatures Of The Orange-Throat Darter Etheostoma Spectabile (Agassiz), Boyce W. West

Journal of the Arkansas Academy of Science

No abstract provided.

Fisheries Report No 3 - Western Australian Freshwater Fisheries, Donald D. Francois

Fisheries Research Reports

Most of the Australian States have a comprehensive system of inland waterways, Western Australia, however, is in a less fortunate position. True, the maps of the State show many rivers, but in much of the southern, more populous part, with no summer rain and no winter snow, the majority are virtually a chain of waterholes during the long summer months. At the same time, in a relatively small section in the south-west corner, there is a series of permanent streams flowing through what was originally dense forest. But apart from the three indigenous freshwater crustaceans, the marron (Cherax tenuimanus), the …

Notes On Triepeolus Remigatus (Fabricius), A "Cuckoo Bee" Parasite Of The Squash Bee, Xenoglossa Strenua (Cresson) (Hymenoptera: Apoidea), George E. Bohart

All PIRU Publications

No abstract provided.

The Feather Mite Genus Proctophyllodes (Sarcoptiformes: Proctopbyllodidae), Warren T. Atyeo, Norman L. Braasch

Bulletin of the University of Nebraska State Museum (1924–2023)

A systematic revision is presented for the genus Proctophyllodes. Data on the bionomics, morphology, and host-parasite relationships are included.