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Articles 41971 - 42000 of 42629
Full-Text Articles in Entire DC Network
The Genus Arrhopalites (Collembola: Sminthuridae) In The United States And Canada, Kenneth Christiansen
The Genus Arrhopalites (Collembola: Sminthuridae) In The United States And Canada, Kenneth Christiansen
International Journal of Speleology
The members of the genus Arrhopalites (Collembola Sminthuridae) found in the U.S. and Canada are described and illustrated. These include six previously described forms and seven new species: A. altus, A. clarus, A. bimus, A. bellingeri, A. dubius, A. hirtus, and A. amarus. Two forms known only from incomplete specimens are described, but not named. Nine of the species are found in caves, but only four of these are at present unknown from surface localities. The characteristics of the genus are described and discussed, and the genus Pseudarrhopalites Stach is placed in synonymy with Arrhopalites. New methods are …
Cenozoic And Recent Lunulitiform Bryozoans Of The Gulf And Atlantic Coasts, Ronald Greeley
Cenozoic And Recent Lunulitiform Bryozoans Of The Gulf And Atlantic Coasts, Ronald Greeley
Doctoral Dissertations
"Free, cup-shaped colonies of cheilostomatous bryozoans, equipped with vibracula, are termed lunulitiform bryozoans. This group is found in sandy and calcareous Cenozoic deposits of the Gulf and Atlantic Coastal Plains. Cupuliform bryozoans are taxonomically distinct from, but in many ways similar to, lunulitiform bryozoans; the two groups are frequently found together.
Known lunulitiform genera of the Gulf and Atlantic Coastal Plains are diagnosed and their species described: Lunulites Lamarck, fifteen species, one new; Oligotresium Gabb and Horn, six species, two new; Discoporella d'Orbigny, two species; Cupuladria Canu and Bassler, two species; Selenaria Busk, one species; Otionella Canu and Bassler, four …
Plant-Derived Pigments And Dyes Used By Artists, Samuel C. Rizzetta
Plant-Derived Pigments And Dyes Used By Artists, Samuel C. Rizzetta
Masters Theses
History
Uses of Biologically-derived Products in Painting
Throughout history man has relied heavily on plant-derived materials in the production of paintings. Plant products have been used to fulfill each of the material requirements of painting. The ground or surface upon which an artist applies paint -is usually of plant origin, such as woven fabrics and paper. The ancient Egyptians painted on canvas (from Linum usitatissimum L.), papyrus, (from Cyperus papyrus L.), and wood (Lucas, 1934:149-150, 201-203; Laurie, 1910:17, 31-32).
At the time of Theophilus leather parchment, preferably of horsehide, was popular for painting (Bazzi, 1960:13). After parchment, walls and wooden …
Ultrasonic Tracking Of Migratory Fishes With An Internal Tag, Ross M. Horrall, H. F. Henderson, A. D. Hasler
Ultrasonic Tracking Of Migratory Fishes With An Internal Tag, Ross M. Horrall, H. F. Henderson, A. D. Hasler
School of Natural Resources: Faculty Publications
First paragraph:
A small ultrasonic tag, 9 mm by 40 mm in size, has been developed by members of the fish orientation group at the University of Wisconsin. The tag emits a continuous signal at approximately 65 kc/sec. The signal is received via a directional hydrophone and a high quality communications receiver. Tracking ranges of up to 1 km have been obtained. The placement of the tag is internal: either into the stomach or into the body cavity of the fish. The tags and tracking equipment have been successfully employed in studies on the open water movements and orientation of …
Canine Teeth In Two Nebraska Mule Deer, John P. Weigand
Canine Teeth In Two Nebraska Mule Deer, John P. Weigand
Nebraska Game and Parks Commission: Staff Research Publications
During the November 1963 deer hunting season in Nebraska, hunters were required to produce all deer bagged at compulsory check stations. Information regarding species, sex and age of all deer checked was recorded at each station. It was at the North Platte station that the author examined the deer described below. A total of 423 deer, of which 322 were mule deer, were examined at this station.
Hospital Situations In Which Male Patients Prefer A Male Nurse, Norma Groome White
Hospital Situations In Which Male Patients Prefer A Male Nurse, Norma Groome White
Loma Linda University Electronic Theses, Dissertations & Projects
This was a study of the preferences of men patients for the sex of the nurse desired to meet their physical, social, spiritual, and emotional needs. The purposes of the study were: (1) to identify the hospital situations in which a male nurse is preferred to give care, (2) to provide information that could be used in the utilization of male personnel, and (3) to provide information that could be used to possibly provide for better fulfillment of the needs of male patients.
The descriptive survey was chosen as the method of study. A questionnaire of thirty-five hospital situations was …
The Role Of Thiamine Pyrophosphate In Regulating The Level Of Gamma-Aminobutyric Acid In The Central Nervous System, Bryant L. Adams
The Role Of Thiamine Pyrophosphate In Regulating The Level Of Gamma-Aminobutyric Acid In The Central Nervous System, Bryant L. Adams
Theses and Dissertations
The level of gamma-aminobutyric acid in the brains of white rats suffering from thiamine deficiency symptoms resulting from pyrithiamine or oxythiamine antagonism of thiamine or from thiamine deprivation was measured. The level of this amino acid was 17.5% lower in the brains of pyrithiamine-treated rats and 20.0% lower in the brains of thiamine-deprived rats than in the control rats. Daily injections of ten times the required amounts of vitamin B6 in rats treated with pyrithiamine or oxythiamine or by thiamine deprivation had no effect on the level of brain gamma-aminobutyric acid or on the psiological behavior of these rats. The …
Studies Of Rat Brain Thiamine Pyrophosphokinase, Lavell Rolfson Johnson
Studies Of Rat Brain Thiamine Pyrophosphokinase, Lavell Rolfson Johnson
Theses and Dissertations
The enzyme ATP:thiamine pyrophosphotransferase (thiamine pyrophosphokinaseJ was purified from acetone powders which were prepared from rat brains up to the chromatography on alumina C_γ step by a modified procedure that Mano (Y. Mano, J. Biochem., 42, 283 (1960)] developed for the purification of the rat liver thiamine pyrophosphokinase. The enzyme was purified 12 fold over that in the original extract of the acetone powder. A spectrophotometric assay for the brain thiamine pyrophosphokinase was developed utilizing brewer's yeast apotransketolase. The transketolase assay was able to detect less than 10^-11 moles of thiamine diphosphate, which was synthesized by the kinase, in the …
Potential Neoplasm Inhibitors, Andrew G. Bachmann
Potential Neoplasm Inhibitors, Andrew G. Bachmann
Master's Theses
The historical portion of this paper is designed to show the value of mustard compounds in the treatment of cancer and the methods used to take advantage of various exploit able variants between normal tissue and cancerous tissue.
The experimental section is an effort to evaluate and take advantage of the variant of pH.
The Monadnock Volume 39, June 1965, Clark University Geographical Society
The Monadnock Volume 39, June 1965, Clark University Geographical Society
The Monadnock (Clark Geographical Society)
Volume 39 of The Monadnock. The Monadnock was the alumni magazine of the Clark University Geographical Society (1927-1985) (2014-present).
Synthesis Of Potential Anti-Tumor Agents Related To Ethanolamine. I. Phenoxyacetic Acid Derivatives, Kenneth Wayne Rodarmer
Synthesis Of Potential Anti-Tumor Agents Related To Ethanolamine. I. Phenoxyacetic Acid Derivatives, Kenneth Wayne Rodarmer
Masters Theses
Introduction
Derivatives of phenoxyacetic acid (PAA), because of their activity as synthetic auxins, have long been of interest in the botanical sciences. PAA itself was noted (29) to have some auxin activity. However, real interest in PAA derivatives awaited the establishment of 2,4-dichlorophenoxyacetic acid (2,4-D) as a powerful, selective herbicide (12). An enormous number of PAA analogs and homologs have been investigated for their potential in the herbicide industry, and the statistical evidence from these investigations has been used as the basis for several interesting and sometimes conflicting theories of auxin mechanisms (17, 26, 23, 27).
Physiological effects of PAA …
Helianthus Annuus - The Separation And Identification Of A New Fatty Acid, Donald C. Gruber
Helianthus Annuus - The Separation And Identification Of A New Fatty Acid, Donald C. Gruber
Masters Theses
Introduction
The term "fatty acids" was first applied principally to saturated, monobasic carboxylic acids and especially to long chain acids derived from animal and vegetable oils. As time passed and the knowledge of natural fats increased, polyunsaturated, hydroxy, keto and branched chain acids were also found as constituents of these fats and oils and these also came under the heading of fatty acids. Even acids containing alicyclic substituents were found.
More recently the term 11 fatty acid" has been applied to include saturated and unsaturated monobasic carboxylic acids and several other series of substituted acids having carbon skeletons similar to …
The Extent To Which Patients Follow Their Low-Cholesterol Diets, Beverly Jo Peterson
The Extent To Which Patients Follow Their Low-Cholesterol Diets, Beverly Jo Peterson
Loma Linda University Electronic Theses, Dissertations & Projects
This exploratory study was conducted to discover to what extent patients follow their low-cholesterol diets. If they did not, the reasons were investigated. It was hoped that the findings would aid in defining areas of instruction which need greater emphasis when patients receive instruction concerning a low-cholesterol diet.
An interview guide was used as a data gathering tool. The dietitians at one private teaching hospital recorded all dietary prescriptions sent to them during the specified period and ten physicians were contacted for permission to include their patients in the study. The patients were then contacted by telephone and the interviews …
The Affect Of Activities In The Intensive Care Unit On Patients, Dorothy Millholland Mottweiler
The Affect Of Activities In The Intensive Care Unit On Patients, Dorothy Millholland Mottweiler
Loma Linda University Electronic Theses, Dissertations & Projects
The purpose of this study was to find out whether there is a relationship between what the patient can see and hear of on-going activities in the intensive care unit and patient stress. The descriptive survey method was used. A checklist was developed from several sources in literature. Data were collected by observation of individual patients in two intensive care units and by recording their behavior on the checklist. Recording of stress signs was done for five minute intervals every thirty minutes for eight hours, making sixteen intervals for every eight hour period. Nineteen separate patient observations of eight hour …
Geology Of The Monte Cristo Area, Bear River Range, Utah, Robert B. Smith
Geology Of The Monte Cristo Area, Bear River Range, Utah, Robert B. Smith
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
The Monte Cristo area is a 7 1/2-minute quadrangle located in the southeastern. part of the Bear River Range, northern Utah. It is within the Middle Rocky Mountain province and is 10 miles east of the Basin and Range province. Previous to this investigation little was known about the detailed geology of the area except for a reconnaissance study and general geologic map of the Cache County part included in the Geologic Atlas of Utah, Cache County, published by Williams (1958).
The purposes of this investigation were as follows: (1) to determine the formations present in the area and their …
Effect Of Calcium Availability On Alfalfa Grown In Calcareous High Sodium Soils, Harry Irving Nightingale
Effect Of Calcium Availability On Alfalfa Grown In Calcareous High Sodium Soils, Harry Irving Nightingale
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
In soil science we shall always be confronted with reactions in soils that involve Ca. Early recognition of this led to experimentation in this area. Due to the fact that Ca deficiency is most common in acid soils, the majority of the experimentation has in the past been largely confined to acid soils and their soil-Ca-plant relationships. There has been relatively little research done with Ca and its availability problems associated with alkaline or sodic soils.
Error Structure Of Randomized Design Under Background Correlation With A Missing Value, Tseng-Chi Chang
Error Structure Of Randomized Design Under Background Correlation With A Missing Value, Tseng-Chi Chang
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
The analysis of variance technique is probably the most popular statistical technique used for testing hypotheses and estimating parameters. Eisenhart (12) presents two classes of problems solvable by the analysis of variance and the assumption underlying each class. Cochran (9) lists the assumptions and also discusses the consequences when these assumptions are not met. It is evident that if all the assumptions are not satisfied, the confidence placed in any result obtained in this manner is adversly affected to varying degrees according to the extent of the violation.
Amphibians And Reptiles Of Vigo County, Indiana, David Rubin
Amphibians And Reptiles Of Vigo County, Indiana, David Rubin
All-Inclusive List of Electronic Theses and Dissertations
Vigo County, Indiana is an extremely interesting area for herpetological studyo Its geographical location allows for the interplay of faunal elements from east, west, north, and south (Smith and minton, 1957) and its physiography permits investigation of the relations of terrain and glacial geology to herpetofaunal distribution. Blatchley (1891, 1899) published two papers on the amphibians and reptiles of the county and Allyn and Shockley (1938) reported on the county's salamandersa The present paper has the following objectives: to determine which species occur or have recently occurred in Vigo County; to determine amphibian and reptile distribution in the county; to …
Age And Growth Of The River Carpsucker, Carpiodes Carpio, In The Missouri River, Larry A. Morris
Age And Growth Of The River Carpsucker, Carpiodes Carpio, In The Missouri River, Larry A. Morris
Nebraska Game and Parks Commission: Staff Research Publications
The river carpsucker, Carpiodes carpio, was collected in the Missouri River bordering eastern Nebraska in 1961 and 1962. During and preceding the study period the course of the river was being altered to promote commercial barge traffic. These alterations resulted in numerous cutoff lakes and chutes many of which were left open to the river at their downstream ends. Collections were made both here and in the river channel. Age and growth data from collections in the cutoff lakes and chutes were combined, while age and growth determinations were made separately for fish from the main stream. The differences …
Regulation Of Pheasant Density Through Nest Abandonment In South-Central Nebraska, Raymond L. Linder, C. Phillip Agee
Regulation Of Pheasant Density Through Nest Abandonment In South-Central Nebraska, Raymond L. Linder, C. Phillip Agee
Nebraska Game and Parks Commission: White Papers, Conference Presentations, and Manuscripts
In a five-year study of the ring-necked pheasant (Phasianus colchicus) in south-central Nebraska, Linder, Lyon and Agee (1960) proposed that "the quality of nesting environment determines the number of nests which will be successful in a given year; this regulates total production which in turn determines the following year's breeding population." These conclusions were based upon the following findings:
1. A close correlation existed between the number of chicks produced and the number of hens the following spring. Because of this relationship it was concluded that mortality through fall, winter and early spring was relatively constant from year …
Specialized Weather Information For Arkansas Agriculture, Donald A. Downey
Specialized Weather Information For Arkansas Agriculture, Donald A. Downey
Journal of the Arkansas Academy of Science
No abstract provided.
National Forest Recreation In Utah, U.S. Department Of Agriculture: Forest Service
National Forest Recreation In Utah, U.S. Department Of Agriculture: Forest Service
Elusive Documents
No abstract provided.
Fruit Growing In Western Australia, Western Australian Department Of Agriculture, Western Australian Tourist Development Authority
Fruit Growing In Western Australia, Western Australian Department Of Agriculture, Western Australian Tourist Development Authority
Horticulture published reports
Revised 1965.
The Mediterranean type climate of the coastal belt of the south-west of Western Australia is suitable for the commercial production of apples, pears, various stone fruits, oranges, grapes, and several other less important fruits. The warm dry summers (November-March), are too severe for the profitable production of many berry fruits and the winters too cool and wet for most tropical fruits. Figs, mulberries and olives all flourish in this climate but, for economic reasons, few are grown commercially.
A small tropical fruit industry, mainly bananas, has been established along the banks of the Gascoyne River at Carnarvon, which …
Miocene Mammals And Central American Seaways, Frank C. Whitmore Jr., Robert H. Stewart
Miocene Mammals And Central American Seaways, Frank C. Whitmore Jr., Robert H. Stewart
United States Geological Survey: Staff Publications
The fossil mammal faunas of North and South America indicate that the two continents were separated from Paleocene or earlier time until the late Pliocene. Unfortunately our almost complete ignorance of the Tertiary land mammals of Central America, the geology of this large area, makes reconstruction of the Tertiary zoogeography of the region between the continents an exercise involving considerable speculation.
The Starling, John L. Long
The Starling, John L. Long
Journal of the Department of Agriculture, Western Australia, Series 4
Despite their pretty colour and their song, starlings cannot be considered beneficial, especially in the fruit and grain-growing areas of W.A. where they are declared vermin.
MILLIONS of starlings inhabit the settled parts of eastern and south-eastern Australia, but so far they have not reached Western Australia.
Proceedings Of A Summer Institute In Water Resources: Volume 3 - Water Quality Control And Management, P. H. Mcgauhey
Proceedings Of A Summer Institute In Water Resources: Volume 3 - Water Quality Control And Management, P. H. Mcgauhey
Reports
Foreward: Recognizing the need for training of individuals to meet the rapidly rising problems connected with water resources development, Utah State University, with National Science Foundation support, organized a Summer Institute in Water Resources for college teachers. it was hoped that participants carefully selected from all regions of the country would receive additional insight and stimulation to improve and enlarge water resources training programs at their own institutions. Thus, the accelerated dissemination of such knowledge on a national scale could be facilitated. Realizing further that the key to a successful institute of this nature lay in the excellence of its …
Carcinostatic Sulfonic Acid Esters Of Selected 1,4-Diols, Robert A. Earl
Carcinostatic Sulfonic Acid Esters Of Selected 1,4-Diols, Robert A. Earl
Masters Theses
Introduction
The purpose of this research was to prepare the bisarylsulfonic acid esters of 1,4-butanediol and 1,4-but-2-ynediol.
This series of compounds is of interest because of the antitumor activity exhibited by the bismethanesulfonates of 1,4-butanediol and 1,4-but-2-ynediol. The compounds which were prepared were submitted to Cancer Chemotherapy National Service Center for evaluation in their anticancer program.
It was hoped that the compounds synthesized would be of pharmacological value. It was further hoped that the biological test data of these compounds would demonstrate a correlation between types of substituents on the aromatic nucleus and the degree of activity of the compounds. …
Transformations Of Tryptamine And Tryptophan By Basidiomycetes, Hsaio-Lung Cheng
Transformations Of Tryptamine And Tryptophan By Basidiomycetes, Hsaio-Lung Cheng
Masters Theses
"The product formed from tryptamine by Trichloloma nudum was identified as indoleacetic acid (IAA) and from tryptophan by Cantharellus cibrarius as indolelactic acid (ILA). The products were extracted from the spent media with organic solvents. Purification and identification of the crystalline transformation products were accomplished by means of paper chromatography, spectrophotometry and thin layer chromatography.
The conversion of tryptamine and tryptophan was also studied in cultures of Lencopaxillus paradoxus, Pluteus granularis and Pleuatus ostreatus. Only Pluteus granularis was found to transform tryptamine into IAA. Lencopaxillus paradoxus transformed tryptamine into oxindoleacetic acid (OIAA).
Paper chromatography proved to be useful …
Taxonomic Study Of Fossil And Recent Otoliths Of Certain Cuskeels, Gary Neal Pointer
Taxonomic Study Of Fossil And Recent Otoliths Of Certain Cuskeels, Gary Neal Pointer
Masters Theses
"Otoliths are calcareous structures occurring in the auditory labyrinths of teleost (bony) fishes. Three pairs of these earstones normally are found: the sagitta, in the sacculus; the asteriscus, in the lagena; and the lapillus in the utriculus. In fishes other than the Order cypriniformes (carp, catfishes, and related forms), the sagitta is the largest otolith, and it may be used in taxonomic and other studies. Fossil earstones of cuskeels (Family Ophidiiae-Brotulidae), constituting the Preophidion complex, occur in relative abundance at various levels in the Claiborne, Jackson, and Vicksburg groups of the Lower Tertiary on the Gulf Coast. The present study …