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Full-Text Articles in Entire DC Network
A New Genus And Species Of Oribatid From Pack Rat Nests (Acari: Cryptostigmata, Tectocepheidae), Tyler A. Woolley, Harold G. Higgins
A New Genus And Species Of Oribatid From Pack Rat Nests (Acari: Cryptostigmata, Tectocepheidae), Tyler A. Woolley, Harold G. Higgins
Great Basin Naturalist
No abstract provided.
Undescribed Species Of Nearctic Tipulidae (Diptera), Ix, Charles P. Alexander
Undescribed Species Of Nearctic Tipulidae (Diptera), Ix, Charles P. Alexander
Great Basin Naturalist
No abstract provided.
Redescription Of Microzetes Auxiliaris Appalachicola Jacot (Acari: Cryptostigmata, Microzetidae), Harold G. Higgins, Tyler A. Woolley
Redescription Of Microzetes Auxiliaris Appalachicola Jacot (Acari: Cryptostigmata, Microzetidae), Harold G. Higgins, Tyler A. Woolley
Great Basin Naturalist
No abstract provided.
Nomenclature Changes In The Alaskan Flora, Stanley L. Welsh
Nomenclature Changes In The Alaskan Flora, Stanley L. Welsh
Great Basin Naturalist
No abstract provided.
No. 025 Newsletter - Association For Asian Studies. Committee On East Asian Libraries, Raymond N. Tang
No. 025 Newsletter - Association For Asian Studies. Committee On East Asian Libraries, Raymond N. Tang
Journal of East Asian Libraries
No abstract provided.
The Effect Of Pregnancy And Lactation On The Iodine Compounds In The Tissues And Plasma Of The Rat, Harry Jay Lyons
The Effect Of Pregnancy And Lactation On The Iodine Compounds In The Tissues And Plasma Of The Rat, Harry Jay Lyons
Theses and Dissertations
An isotopic equilibrium method was employed, based on the chronic feeding of an 125I-labeled diet of known specific activity, to determine the distribution and quantitation of endogenously labeled iodine-containing compounds in the female rat at various periods during gestation and post-parturition. A decrease was associated with gestation in the total iodine, which was significant in all extrathyroidal tissues except the brain and muscle, and a fall in thyroxine concentration which was significant in all extrathyroidal tissues except the heart. The triiodothyronine level decreased from the control values in gestation but not as consistently. There was also a significant decrease in …
An Analysis And Comparison Of Linear Phase Bandpass Filters, Darrell L. Ash
An Analysis And Comparison Of Linear Phase Bandpass Filters, Darrell L. Ash
Theses and Dissertations
The ideal bandpass filter is defined as one which uniformly attenuates and delays all frequency components within the passband and effects zero transmission of all components outside the passband. For reasons which will be subsequently discussed, it is impossible to realize a stable lumped-element filter having this ideal characteristic. This has made it necessary to find ways to physically approximate such a characteristic. Some of the more widely used methods will be compared and analyzed in this paper.
Determination Of Stability Constants At 25c For The Interaction In Aqueous Solution Of Serine With Co (Ii), Ni (Ii), Cd (Ii), Zn (Ii), And Cu (Ii) Ions, Liak Hwe Ma
Theses and Dissertations
Values of thermodynamic stability constants at 25°C for the complexes of serine with the metal ions. Co^2+, Ni^2+, Cd^2+, Zn^2+, and Cu^2+ were obtained from pH titration data. All measurements were made in aqueous solution, and data were obtained at three different ionic strengths for each metal ion studied. It was assumed that the activity of the zwitterion is unity. The effect of metal ion hydrolysis upon the log K values was taken into account for the calculations. For all the metal ions studied, stability constants for MA^+, MA_2, and MA_3^- were reported with the exception of copper (II) which …
Scorpions Of Utah, John D. Johnson
Scorpions Of Utah, John D. Johnson
Theses and Dissertations
Scorpions from Utah were collected and studied to determine species present, geographic distribution, seasonal occurrence, sex ratio, and some morphological variations associated with distribution. Nine species were identified--Anuroctonus phaeodactylus, Centruroides sculpturatus, Hadrurus arizonensis, H. spadix, Vejovis becki, V. boreus, V. confusus, V. wupatkiensis, and an undescribed species of Vejovis, subgenus Paruroctonus. Five species--C. sculpturatus, H. arizonensis, V. becki, V. confusus, and V. wupatkiensis--are reported from Utah for the first time. Most specimens were collected from May through October, with greatest numbers taken in May, June, and July. Sex ratios differed with the species. Two species--A. phaeodactylus and V. boreus--showed statistically …
Thrips Of The Sagebrush-Grass Range Community In West-Central Utah, Ward Max Tingey
Thrips Of The Sagebrush-Grass Range Community In West-Central Utah, Ward Max Tingey
Theses and Dissertations
Three predominant and economically important shrubs of the sagebrush-grass range community in Utah, namely big sagebrush (Artemisia tridentata Nutt.), rubber rabbitbrush (Chrysothamnus nauseosus (Pall.) Britt.), antelope bitterbrush (Purshia tridentata (Pursh) DC), and a widely re-seeded range grass, crested wheatgrass (Agropyron cristatum (L.) Gaertn.) were sampled during the summers of 1966 and 1967, and yielded twenty species of thrips. Three species (Anaphothrips tricolor Moulton, Chirothrips aculeatus Bagnall, Chirothrips simplex Hood) were new distributional records for Utah. Seven species (Frankliniella n. sp. #1, Frankliniella n. sp. #2, Haplothrips n. sp., Leptothrips n. sp., Oedaleothrips n. sp., Sericothrips n. sp. #1, Sericothrips n. …
A Study Of Reaction Parameters In The Hydrogenation Of Acetic Acid By Rhenium Heptoxide Catalyst, Victor L. Mylroie
A Study Of Reaction Parameters In The Hydrogenation Of Acetic Acid By Rhenium Heptoxide Catalyst, Victor L. Mylroie
Theses and Dissertations
Rhenium oxides as well as other rhenium compounds are known to display a broad spectrum of catalytic activity,^25 being resistant to attack by acids under nonoxidizing conditions, and showing a remarkable ability to resist poisoning which is a serious limiting factor in many commonly used catalysts. Rhenium catalysts are cheaper than the platinum metals with the exception of palladium. One of the most remarkable properties of the rhenium catalyst is the ability to catalyze the hydrogenation of carboxylic acids and amides to the corresponding alcohols and amines respectively. The carboxyl group (-COOH) is notoriously difficult to reduce catalytically and most …
The Ecology And Life History Of Sceloporus Occidentalis Longipes Baird On Rainier Mesa At Nevada Test Site, James Mark Hopkin
The Ecology And Life History Of Sceloporus Occidentalis Longipes Baird On Rainier Mesa At Nevada Test Site, James Mark Hopkin
Theses and Dissertations
The study was undertaken to learn the life history of Sceloporus occidentalis longipes and its environmental adaptations on a high plateau (Rainier Mesa) with an elevation of 2,286 meters, at the Atomic Energy Commission's Nevada Test Site in Nye County, Nevada. The lizards emerge from hibernation in April with the males preceeding the females by a period of one to two weeks or more. Mating occurs in late April, May, and perhaps early June. Eggs are laid between 10 June and 15 July. Clutches of 9 to 15 eggs are laid with the younger females usually laying 9 eggs. No …
Overwintering Sites And Winter Mortality Rates Of Certain Predaceous Mites In Central Utah Orchards (Phytoseiidae: Typhlodromus), John Wayne Leetham
Overwintering Sites And Winter Mortality Rates Of Certain Predaceous Mites In Central Utah Orchards (Phytoseiidae: Typhlodromus), John Wayne Leetham
Theses and Dissertations
The overwintering habitats and winter mortality rates of predaceous mites (Phytoseiidae: Typhlodromus) were investigated during three successive winters, 1965-66, 1966-67, and 1967-68. Three species were predominant in derelict apple orchards, Typhlodromus mcgregori Chant on twigs and spurs and rough bark of scaffold limbs and trunk, Typhlodromus occidentalis Nesbitt on rough bark of scaffold limbs and trunk, and Amblyseius cucumeris Oudemans in ground cover. Other species (Typhlodromus columbiensis Chant, Typhlodromus caudiglans Schuster, Amblyseius fallacis (Garman), Amblyseius ovatus (Garman), Amblyseius floridanus (Muma), and Amblyseius rosellus Chant) were collected only incidentally. Substantial numbers of T. mcgregori and T. occidentalis were found to fall …
High Pressure, High Temperature Syntheses Of Rare Earth Diantimonides And Th₃P₄ Type Polymorphs Of Rare Earth Sesquisulfides, Normal L. Eatough
High Pressure, High Temperature Syntheses Of Rare Earth Diantimonides And Th₃P₄ Type Polymorphs Of Rare Earth Sesquisulfides, Normal L. Eatough
Theses and Dissertations
The rare earths form series of compounds which are known for several elements but end abruptly or undergo a change of structure at some member of the series. The diantimonides are one such series. Sb-Sb repulsion becomes stronger as the rare earth size decreases and the previously known series ended at Sm. It was felt that high pressure would overcome the Sb-Sb repulsion and allow bonding to form stable or metastable compounds not possible by ordinary techniques. Synthesis studies were carried out on mixtures of antimony with all the rare earths except Pm and with Sc and Y. The known …
Nesting Ecology Of The Ferruginous Hawk (Buteo Regalis) In West-Central Utah, John Bradford Weston
Nesting Ecology Of The Ferruginous Hawk (Buteo Regalis) In West-Central Utah, John Bradford Weston
Theses and Dissertations
During the spring seasons of 1967 and 1968 ecological studies were made of nesting Ferruginou.s Hawks (Buteo regalis) in a 325 square mile area in west-central Utah. In the springs of 1967 and 1968 a systematic search was conducted throughout the study area for Ferruginous Hawk nests. When active nests were located they were kept under observation throughout the study. The density of nesting pairs in 1967 and 1968 ranged from 7 to 15.4 square miles per pair. An annual seasonal displacement was exhibited, with Ferruginous Hawks being present in the study area only during the nesting season, which lasted …
Vegetational Changes In A Mountain Brush Community Of Utah During Eighteen Years, Robert J. Eastmond
Vegetational Changes In A Mountain Brush Community Of Utah During Eighteen Years, Robert J. Eastmond
Theses and Dissertations
This vegetational analysis is concerned with changes which have cocurred since 1949 in a mountain brush community within an exclosure in the central Wasatch Mountains. The exclosure, established in 1949, is located in Pole Canyon on lower Provo Canyon. Two major studies have been conducted previously, but it has been nine years since the last intensive work was done. Several major changes occurring during the eighteen year period are evident and are described.
Factors Influencing Production Of Flower Stalks In Agropyron Cristatum (L.) Gaertn, Neil C. Frischknecht
Factors Influencing Production Of Flower Stalks In Agropyron Cristatum (L.) Gaertn, Neil C. Frischknecht
Theses and Dissertations
A study was made of factors that influence production of different numbers of flower stalks of crested wheatgrass on grazed and ungrazed areas. Both laboratory and field studies were made. Greatest response in flower stalk production resulted from application of nitrogen in the field, amounting to an increase of from 5 to 10 times the numbers of flower stalks on untreated areas. Responses of plants in the greenhouse supported these results. Plants grown in the dark indicated that higher carbohydrate reserves existed in ungrazed than in grazed plants. It was concluded that a high carbohydrate-low nitrogen balance was the primary …
A Study Of Multiple Embryo Development In The Netleaf Hackberry (Celtis Reticulata), Gary Porter Lawrence
A Study Of Multiple Embryo Development In The Netleaf Hackberry (Celtis Reticulata), Gary Porter Lawrence
Theses and Dissertations
Previous research has shown that polyembryony occurs in many species of the Ulmaceae. The purpose of this study was to determine the method of multiple embryo formation in netleaf hackberry, Celtis reticulata Torr. Collections of specimens were made throughout a two-year period. Collections were begun in early spring while the trees were still in the bud state. Collections were continued regularly throughout the growing season. The collections were preserved in FAA solution and were prepared for microscopic examination as follows: (1) The tertiary butyl paraffin method was used for dehydrating and embedding. (2) Sectioning was done on a rotary microtome …
Inhibition Of Planarian Regeneration, Douglas Pierre Bingham
Inhibition Of Planarian Regeneration, Douglas Pierre Bingham
Theses and Dissertations
This thesis describes my study of inhibition of brain regeneration in planaria. The flatworm (Dugesia tigrina) possesses a remarkable ability to regenerate lost parts, including the head. The primary objective of my study was to determine the extent to which an inhibiting substance, located in the head, would prevent regeneration of the brain. A secondary objective was to study whether DMSO (Dimethyl Sulfoxide) would facilitate the action of the inhibitor.
Osteological And Myological Comparisons Of The Head And Thorax Regions Of Cnemidophorus Tigris Septentrionalis Burger And Ameiva Undulata Parva Barbour And Noble (Family Teiidae), Don Lowell Fisher
Theses and Dissertations
There has long been a need for a comparative study of the osteological and myological structures of the reptilian family Teiidaeo This present study is organized to increase our understanding of the anatomical features of the head and thorax regions of two members of distinct phylogenetic branches of the family Teiidaeo The two genera discussed are Cnemidophorus and Ameiva.
A Study Of The Channel Catfish, Ictalurus Punctatus (Rafinesque), In Mud Lake, Utah, Horst Friedrich Siewert
A Study Of The Channel Catfish, Ictalurus Punctatus (Rafinesque), In Mud Lake, Utah, Horst Friedrich Siewert
Theses and Dissertations
From June to November 1967, a study on channel catfish, lctalurus punctatus (Rafinesque), in Mud Lake, Utah Co., Utah was undertaken. The objectives were (I) to estimate if channel catfish are increasing or decreasing in Mud Lake, (2) to estimate the mean size of adult channel catfish in Mud lake, (3) to determine which environmental factors effect the catch of channel catfish, and (4) to determine if the channel catfish in Mud lake are residents year round. A total of 310 mature channel catfish and 920 carp were collected with four hoop nets. Two fingerling were captured by seining. Ratios …
Field Observations And Laboratory Studies On Growth And Tillering In Seedlings Of Oryzopsis Hymenoides As Affected By Selected Environmental Factors Of The Sand Dunes Of Lynndyl, Utah, Leopold B. Smigelski
Field Observations And Laboratory Studies On Growth And Tillering In Seedlings Of Oryzopsis Hymenoides As Affected By Selected Environmental Factors Of The Sand Dunes Of Lynndyl, Utah, Leopold B. Smigelski
Theses and Dissertations
Seedlings of Indian rice grass Oryzopsis hvmenoides (Roem. & Shult.) Ricker. were studied to determine the effect of soil moisture, photoperiod, depth of burial of germinated grains, temperature, and the rate of soil accumulation on seedling growth and tillering. The study was performed in two phases: Field observations and laboratory studies. Field observations were made on a system of sand dunes located northwest of Lynndyl, Utah. General observations were made from January, 1966 to May, 1968.
An Experimental Investigation Of Proportional Braking, Rudolf Limpert
An Experimental Investigation Of Proportional Braking, Rudolf Limpert
Theses and Dissertations
In recent years automobile safety has become more and more important.The braking device contributes largely to the problem of safe driving.
Design And Operation Of Equipment For Impact Test Of A Hydraulic Cushion, Harshadbhai R. Patel
Design And Operation Of Equipment For Impact Test Of A Hydraulic Cushion, Harshadbhai R. Patel
Theses and Dissertations
In recent years, experiments have been carried out to evaluate the performance of water-filled cushion cells used to attenuate energy of automobile collisions. The water-filled cushion cell is a vinyl plastic cylinder of 6 inches nominal outside diameter, 1/4 inch wall thickness, 40 inches length, closed at the bottom by a cast-in-place vinyl plug and partially closed by a bolted-in vinyl diaphragm at the upper end. These cells are designed to be installed in the path of a crashing automobile to absorb and dissipate the kinetic energy of impact. Properly designed cushions could be used as one means of saving …
Development Of A Generalized Structural Dynamics Computer Program, Val E. Simmons
Development Of A Generalized Structural Dynamics Computer Program, Val E. Simmons
Theses and Dissertations
The purpose of this thesis was the development of a generalized structural-dynamics computer program to calculate the response of multi-degree-of-freedom systems. The user of this computer program, having a limited background in matrix algebra and vibrational analysis, can gain numerical and graphical information concerning the dynamic response of multi-degree-of-freedom structures. The user, with a minimal amount of FORTRAN experience, will find this thesis ideally suited for his needs.
The Relationship Of The Priesthood Correlation Program To The Latter-Day Saint Concept Of Zion, Dale C. Mouritsen
The Relationship Of The Priesthood Correlation Program To The Latter-Day Saint Concept Of Zion, Dale C. Mouritsen
Theses and Dissertations
The purpose of the study is to analyze the Latter-day Saint concept of Zion and the Priesthood Correlation Program in order to determine how they are related and to what extent the Correlation Program is attempting to prepare the Church for the establishment of Zion.
Nesting Ecology And Behavior Of The Golden Eagle In West Central Utah, Franz J. Camenzind
Nesting Ecology And Behavior Of The Golden Eagle In West Central Utah, Franz J. Camenzind
Theses and Dissertations
The Golden Eagle Aquila chrysaetos canadensis Linn. is facing extinction in much of its range. In the Western Hemisphere its numbers are restricted primarily to the mountainous regions west of the 99th meridian, from extreme northern Alaska to northern Mexico (Hobbie and Cade, 1962) and from timberline in Colorado to below sea level in Death Valley, California (Summer, 1929a).
Nesting Ecology Of The Great Horned Owl Bubo Virginianus In Central Western Utah, Dwight Glenn Smith
Nesting Ecology Of The Great Horned Owl Bubo Virginianus In Central Western Utah, Dwight Glenn Smith
Theses and Dissertations
Information was collected on the nesting ecology of the Great Horned Owl, with particular emphasis placed on aspects of its population and distribution, territoriality and predation. The study was conducted for the two years, 1967 and 1968 in the Thorpe and Topliff hills of central western Utah. Nesting densities on the study area were .36 pairs per square mile in 1967 and .40 pairs per square mile in 1968. Nests averaged one mile apart and were distributed in the periphery of the hills, overlooking the desert valleys. Favorite nest sites were cliff niches, but abandoned quarries and junipers were also …