Open Access. Powered by Scholars. Published by Universities.®

Digital Commons Network™

Open Access. Powered by Scholars. Published by Universities.®

Physical Sciences and Mathematics

Institution
Keyword
Publication Year
Publication
Publication Type
File Type

Articles 41851 - 41880 of 42630

Full-Text Articles in Entire DC Network

A Study Of Succinic Dehydrogenase, Indole Acetic Acid Oxidase, Nitrate Reductase And Cytochrome C Reductase In Hygrophorus Conicus, Jagdish M. Mehta Jan 1968

A Study Of Succinic Dehydrogenase, Indole Acetic Acid Oxidase, Nitrate Reductase And Cytochrome C Reductase In Hygrophorus Conicus, Jagdish M. Mehta

Doctoral Dissertations

"The activity of the enzyme succinic dehydrogenase (succinate : phenazine methosulfate oxidoreductase, EC 1.3.99.1) of Hygrophorus conicus, a member of a class of fungi known as basidiomycetes, was found to be stimulated by nitrate. Two substances were tested as electron acceptors in the measurement of succinic dehydrogenase activity. Of the two substances tried, phenazine methosulfate and brilliant cresyl blue, the former was found to be the best. Nicotinamide adenine dinucleotide (NAD⁺) was a necessary cofactor for the enzyme and could be readily dissociated from the enzyme. The enzyme has the properties of a high molecular weight nucleo- or lipoprotein.

The …


An Urgent Appeal For Information On Minnesota's Natural Areas Jan 1968

An Urgent Appeal For Information On Minnesota's Natural Areas

Journal of the Minnesota Academy of Science

No abstract provided.


Coleambally Irrigation Area: Herds, Crops, Fruit, Lydia Belthuis Jan 1968

Coleambally Irrigation Area: Herds, Crops, Fruit, Lydia Belthuis

Journal of the Minnesota Academy of Science

Coleambally, a new irrigation unit, to the south of the Murrumbidgee Irrigation Area in Australia, has come into operation since 1960. It is the first land to receive water from the large Snowy Mountain power and water storage development in southeastern New South Wales. This district of some 139,000 acres now produces rice, wheat, hay, vegetables, fat lambs and wool. When all Snowy Mountain structures are completed and reservoirs filled, the irrigation area will be more than tripled in size.


Compte-Rendu De La Conférence Internationale De Spéléologie Et De Karstologie D'Istanbul (24 Sept.-14 Oct. 1964), Paul Fenelon Jan 1968

Compte-Rendu De La Conférence Internationale De Spéléologie Et De Karstologie D'Istanbul (24 Sept.-14 Oct. 1964), Paul Fenelon

International Journal of Speleology

Arranged by geologist Dr. Temucin Aygen, the International Conference of Speleology and Karstology at Istanbul, with the participation of about twenty foreign scholars, opened first at Beyazit de Stamboul University. For three days papers and discussions enlivened the sessions, broken by tours around the Bosporus. During the following two weeks the members of the Conference took a field trip across Anatolia, through Ankara, Konya, Mersin, Antalya, Burdur, Izmir, Bursa, and Istanbul. They thus had the opportunity to investigate the principal karstic phenomena of Turkey - the Konya obrouks, travertines of’ Yerkòpru and Antalya, caves of the Mersin region, vauclusian springs …


Ecological Studies In The Mammoth Cave System Of Kentucky, Thomas C. Barr Jr. Jan 1968

Ecological Studies In The Mammoth Cave System Of Kentucky, Thomas C. Barr Jr.

International Journal of Speleology

The Mammoth Cave system includes more than 175 kilometers of explored passages in Mammoth Cave National Park, Kentucky. Although biologists have explored the caves intermittently since 1822, the inventory of living organisms in the system is still incomplete. The present study lists approximately 200 species of animals, 67 species of algae, 27 species of fungi, and 7 species of twilight-zone bryophytes. The fauna is composed of 22% troglobites, 36% troglophiles, 22% trogloxenes, and 20% accidentals, and includes protozoans, sponges, triclads, nematodes, nematomorphs, rotifers, oligochaetes, gastropods, cladocerans, copepods, ostracods, isopods, amphipods, decapods, pseudoscorpions, opilionids, spiders, mites and ticks, tardigrades, millipedes, centipedes, …


Description Of Nebraska's Common Rocks, Raymond Burchett Jan 1968

Description Of Nebraska's Common Rocks, Raymond Burchett

Conservation and Survey Division: Faculty and Staff Publications

This one page information sheet lists names of common rocks found in Nebraska. It also includes a brief description and locations where these common rocks may be found.


Cyclic Derivatives Of 2-Amino-2-Deoxy-D-Hexopyranoses, Kenji Miyai Jan 1968

Cyclic Derivatives Of 2-Amino-2-Deoxy-D-Hexopyranoses, Kenji Miyai

University of the Pacific Theses and Dissertations

The purpose of this investigation was to prepare heterocyclic derivatives, bridging C-2 and C-3 of 2-amino-2-deoxy-D-hexopyranoses, useful as blocking groups in the preparation of aminosugar oligosaccharides and polysaccharides. The work reported herein is concerned with oxazolidones of 2-amino-2-deoxy-D-hexopyranoses (Figure 1).)

There are no examples known, in which five or six-membered rings are fused in a trans-arrangement to five-membered furanose ring. However, although synthetic difficulties were observed, sic and five-membered rings were fused in a trans-arrangement to a sic-membered pyranose ring as pointed out before. In the case of our trans-diequatorially fused oxazolidones additional preparative difficulties were expected, because of the …


Movements And Behavior Of Pheasants During The Breeding Cycle As Determined By Radio-Tracking, Thomas L. Kuck Jan 1968

Movements And Behavior Of Pheasants During The Breeding Cycle As Determined By Radio-Tracking, Thomas L. Kuck

Electronic Theses and Dissertations

Behavior and movement studies were carried out on the Rifle-Calahan Study area, Sanborn County, South Dakota, in 1965 and 1966. Objectives of the study were to evaluate radio telemetry techniques, determine the territorial area and home range of the hen and cock, study the behavior pattern of hen and cock in the harem makeup, determine the distance traveled by the hen when attracted to the harem, determine if the hen nests in the immediate area of the crowing territory, and study the behavior of the hen while nesting and caring for the brood. Twenty adult pheasants (16 hens and 4 …


Mechanical Effects Of Acoustic Transients On Tobacco Mosaic Virus, Philip Edward Hamrick Jan 1968

Mechanical Effects Of Acoustic Transients On Tobacco Mosaic Virus, Philip Edward Hamrick

Theses and Dissertations

The mechanical breakage of tobacco mosaic virus (TMV) due to the action of acoustic transients has been investigated. The acoustic transients were produced by transient heating of a Prussian blue dye solution (attenuation coefficient of 1000 per cm) when a ruby laser light (20 x 106 watts) was incident on the dye surface. A quartz piezoelectric transducer was used to determine the amplitude and form of the acoustic wave. The production of acoustic waves by transient heating is discussed, and the theoretical form of the acoustic wave determined for various boundary and initial conditions are compared to the experimentally …


Endogenous Metabolism Of Polyporus Sulfureus. : Utilization Of Exogenous Carbohydrates And Fatty Acids, Shu-Mei Wang Jan 1968

Endogenous Metabolism Of Polyporus Sulfureus. : Utilization Of Exogenous Carbohydrates And Fatty Acids, Shu-Mei Wang

Masters Theses

"A strain of Polyporus sulfureus from the collection at the University of Missouri at Rolla was used in this investigation. Organisms of this genus have been reported to produce eburicoic acid in good yield and this was confirmed for the organism used in this study by the isolation and identification of eburicoic acid from the mycelium. Growth studies of this organism showed that 4% malt extract is a better medium than synthetic media containing asparagine, nitrate or nitrate plus 0.5% yeast extract as nitrogen sources. An examination of the pH of the culture medium led to the conclusion that regardless …


A Study Of The Removal Of Pesticides From Water, James David Whitehouse Dec 1967

A Study Of The Removal Of Pesticides From Water, James David Whitehouse

KWRRI Research Reports

The purpose of this study was to investigate some of the properties of pesticides as they exist in water, and to determine the effectiveness of several water treatment processes in the removal of pesticides from water. Among the pesticides investigated were malathion, DDT, aldrin, dieldrin, captan, benzene hexachloride (BHC), 2,4-D, and 2,4,5-T. The water treatment processes included aeration, chemical coagulation, adsorption on activated carbons and clays, and foam separation.

The removal of pesticides from water by aeration was found to be significant. Dieldrin was removed almost 100 percent, while aldrin, DDT, and BHC were removed to a lesser extent. 2, …


Water Quality Study Of Lake Mead, Dale A. Hoffman, Paul R. Tramutt, Frank C. Heller, Bureau Of Reclamation Nov 1967

Water Quality Study Of Lake Mead, Dale A. Hoffman, Paul R. Tramutt, Frank C. Heller, Bureau Of Reclamation

Publications (WR)

This report presents Lake Mead Water quality data obtained from 1964 to 1966. The effect of filling Lake Powell on the water quality of Lake Mead is evaluated. General limnological principles and the present limnology of Lake Mead are discussed. Lake Mead has a warm monomictic annual temperature cycle characterized by summer stratification, fall overturn leading into a continuous circulation throughout the winter; temperatures never fall below 39 deg F (4 deg C). During stratification, lower dissolved oxygen values were recorded in the thermocline than in the epilimnion and hypolimnion. Mineral content increases from the upper to the lower end …


A Survey Of The Breakfast And Snack Habits Of Adventist And Non-Adventist Adolescents, Consuelo A. Bustista Oct 1967

A Survey Of The Breakfast And Snack Habits Of Adventist And Non-Adventist Adolescents, Consuelo A. Bustista

Loma Linda University Electronic Theses, Dissertations & Projects

A study was undertaken to survey by questionnaire and interview methods the breakfast and snack habits of Adventist and non-Adventist adolescents. The purposes of the study were: (I) to find out if there is any difference in the practices of Adventist and non-Adventist teenagers, and (2) to determine their attitudes toward snacking and omission of breakfast.

Results of the questionnaire were coded, punched onto IBM cards, and fed into computing machines for item and statistical analysis. Chi-square test analyses were done on denominational classification against some questions of interest to show any significant differences between Adventist and non-Adventist students' responses. …


Nurse-Patient Interpretations Of The Nurse's Touch, Judith Ann Trowbridge Aug 1967

Nurse-Patient Interpretations Of The Nurse's Touch, Judith Ann Trowbridge

Loma Linda University Electronic Theses, Dissertations & Projects

The purpose of this study was to discover whether or not patients and nurses derived a similar meaning from pictures of a nurse touching a patient in various ways. Five by seven inch black and white photographs were shown to thirty patients and thirty registered nurses. The subjects were controlled in regard to sex, race, residence, language, and physical and emotional orientation. They were asked to focus upon the photographed nurse's touch and to tell in one or two words what meaning they felt that the nurse was trying to convey to the patient by her touch. Responses were recorded …


Radiolysis Of The Extract From The Sawdust Of The Ponderosa Pine, Mervin B. York Aug 1967

Radiolysis Of The Extract From The Sawdust Of The Ponderosa Pine, Mervin B. York

Loma Linda University Electronic Theses, Dissertations & Projects

Portions of an acetone-hexane (1:4) extract of Ponderosa pine sawdust were exposed to gamma and ultraviolet radiation. The three solutions, including the original, were checked for antibiotic activity on: Staphylococcus aureus Escherichia coli and Bacillus cereus. Results indicated that each solution inhibited the growth of the bacteria.

The three solutions were separated into fractions by 'column' chromatography on silica gel, using chloroform-carbon tetrachloride (1:1) as the elutant and then 10-20-50-80% ethanol in the chloroform- carbon tetrachloride mixture and finally 100% ethanol. Ten fractions were obtained from each sample and these were each tested on the bacteria. Results indicated a number …


A Balanced Salt Culture Medium For Halteria Grandinella, Yee Wan Mark Jul 1967

A Balanced Salt Culture Medium For Halteria Grandinella, Yee Wan Mark

All-Inclusive List of Electronic Theses and Dissertations

The animals that the writer worked with liere the unicellular organisms called liaJ,tez:ia grandil.!iilJ.a• They belong to the Pl~lum Protozoa and are placed in the Class Ciliata and the Order Oligotrichia. llftltez'A gDJ}gini•U, like most protozoa, ll ve in waters but they seem to prefer qUiet pools, lakes, and ponds in which aqua i;;!c plants are growing and in which there is much organic matter.


The Monadnock Volume 41, June 1967, Clark University Geographical Society Jun 1967

The Monadnock Volume 41, June 1967, Clark University Geographical Society

The Monadnock (Clark Geographical Society)

Volume 41 of The Monadnock. The Monadnock was the alumni magazine of the Clark University Geographical Society (1927-1985) (2014-present).


A Pre- And Post-Improvement Study On Six Southeast Kansas Strip-Mine Lakes, William Thomas Waller Jun 1967

A Pre- And Post-Improvement Study On Six Southeast Kansas Strip-Mine Lakes, William Thomas Waller

Electronic Theses & Dissertations

During the last sixty years extensive experimental research has been conducted in an attempt to establish methods of controlling the acid conditions resulting from coal mine operations.

It was the purpose of this research to determine the feasibility of reclaiming acid strip-mine lakes for use as potential fisheries management areas. To accomplish the objectives outlined above a two-phase program was initiated. The first phase involved the physical alteration of the drainage areas of the experimental lakes included in this study in an attempt to divert all visible signs of acid drainage to areas other than those incorporated into the drainage …


Geology Of The Northern Part Of The Malad Range, Idaho, Drew C. Axtell May 1967

Geology Of The Northern Part Of The Malad Range, Idaho, Drew C. Axtell

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Rocks of Paleozoic, Tertiary, and Quaternary age are represented in the northern part of the Malad Range. The Paleozoic rocks are represented by thirteen formations that are characterized lithologically by quartzites, shales, and carbonates. The oldest formation in the mapped area of Paleozoic age is the Brigham Formation, and the youngest formation is the Jefferson Formation of late Devonian age.

The rocks of Tertiary age are conglomerates, shales, and limestones and are represented by the Wasatch Formation, the Salt Lake Formation, and boulders. Quaternary rocks include sediments of the Lake Bonneville Group and alluvium.

The faults in the mapped area …


Earthworms: Their Intensive Propagation And Use In Biological Soil Building - Part Vi, Thomas Barrett Apr 1967

Earthworms: Their Intensive Propagation And Use In Biological Soil Building - Part Vi, Thomas Barrett

Green Revolution

Reprint of section of book Earthworms by Thomas Barrett.


Opening Remarks - Third Vertebrate Pest Conference, Maynard W. Cummings Mar 1967

Opening Remarks - Third Vertebrate Pest Conference, Maynard W. Cummings

Vertebrate Pest Conference Proceedings: 3rd (1967)

To open this Third Vertebrate Pest Conference is a real privilege. It is a pleasure to welcome all of you in attendance, and I know there are others who would like to be meeting with us, but, for one reason or another cannot be. However, we can serve them by taking back the results of discussion and by making available the printed transactions of what is said here. It has been the interest and demand for the proceedings of the two previous conferen- ces which, along with personal contacts many of you have with the sponsoring committee, have gauged the …


Proceedings: Third Vertebrate Pest Conference -- Frontmatter & Contents Mar 1967

Proceedings: Third Vertebrate Pest Conference -- Frontmatter & Contents

Vertebrate Pest Conference Proceedings: 3rd (1967)

Sponsored by the California Vertebrate Pest Technical Committee

Maynard W. Cummings - Chairman

Richard H. Dana - Vice Chairman

Rex E. Marsh - Secretary-Treasurer

GENERAL CHAIRMAN OF CONFERENCE - Maynard W. Cummings, Assistant State Director, Agricultural Extension Service, University of California, Davis, California. VICE-CHAIRMAN OF CONFERENCE - Richard H. Dana, Vertebrate Pest Control Specialist, California Department of Agriculture, Sacramento, California. PROGRAM CHAIRMAN - Charles C. Siebe, Vertebrate Pest Control Specialist, California Department of Agriculture, Sacramento, California. PUBLICITY CHAIRMAN - Rex E. Marsh, Associate Specialist, Department of Animal Physiology, University of California, Davis, California. ARRANGEMENTS CHAIRMAN - Jerry P. Clark, Agricultural …


Aircraft As A Means Of Baiting Ground Squirrels, Rex E. Marsh Mar 1967

Aircraft As A Means Of Baiting Ground Squirrels, Rex E. Marsh

Vertebrate Pest Conference Proceedings: 3rd (1967)

Aircraft might soon become an important tool for baiting ground squirrels (Citellus beecheyi beecheyi and C. b. fisheri) on California rangeland. Until recently, almost all squirrel control has been conducted by the hand-baiting method, with grain bait scattered from horseback in spoon-size amounts near squirrel burrows. Ground squirrels are considered a major pest of rangeland in many parts of the West. They not only compete with livestock for forage but also are responsible for substantial losses to cereal and other crops. The magnitude of the problem is exemplified by the fact that, in California alone, over 6,000,000 gross acres of …


The Current Status Of Plague In California, Keith F. Murray Mar 1967

The Current Status Of Plague In California, Keith F. Murray

Vertebrate Pest Conference Proceedings: 3rd (1967)

At the first Vertebrate Pest Control Conference in 1964, I traced the history of plague control in California and outlined a revised approach, based on newer concepts of plague ecology. In our state of relative ignorance, this required a number of unproved assumptions about plague occurrence in California that verged on crystal ball gazing. These were principally that (1) plague persists in relatively resistant rodent species in certain favorable locations, (2) ground squirrels and chipmunks experience periodic epizootics, but are not permanent reservoirs, (3) plague "foci" of the past were merely sites of conspicuous epizootics, they did not necessarily correspond …


The Current Status Of Wild Animal Rabies In California, George L. Humphrey Mar 1967

The Current Status Of Wild Animal Rabies In California, George L. Humphrey

Vertebrate Pest Conference Proceedings: 3rd (1967)

During the 15-years 1952-1966, a total of 3504 cases of animal rabies were reported in California, an average of over 230 cases annually (Table 1). Of these 3504 cases, 2255 or nearly 65 percent were reported in wildlife species. An estimate sometimes used is that for every reported or recognized case of wild animal rabies, 10 cases probably occurred without recognition. Using the foregoing "rule-of-thumb", it can be hypothesized that during the 15-years 1952-1966, an estimated 22,600 or more cases of wildlife rabies occurred in California. The addition of the over 1200 cases of rabies reported in domestic animals during …


Good Practice In Vertebrate Pest Control, Philip J. Spear Mar 1967

Good Practice In Vertebrate Pest Control, Philip J. Spear

Vertebrate Pest Conference Proceedings: 3rd (1967)

Good practice in pest control is a responsibility of several elements in our democratic, free-enterprise society. Most notably, these are: (1) the general public, (2) responsible government agencies and (3) industry. Before I comment about the responsibilities of each of these three groups, let me tell you about the work of structural pest control operators and their interests in vertebrate pest control. The pest control industry which I discussed in detail at the Second Vertebrate Pest Control Conference (1) continues to grow and expand its fields of activity. At the present time, it is our estimate (2) that 26,700 persons …


Review Of Animal Repellents, Jack F. Welch Mar 1967

Review Of Animal Repellents, Jack F. Welch

Vertebrate Pest Conference Proceedings: 3rd (1967)

A review of the literature on this subject reveals there is considerable confusion regarding the meaning of the word "repellent" as it relates to animal control. Some people make a liberal interpretation and include any material or device that will alter the pattern of activity of an animal through response to sight, sound, taste, odor, or touch. Although such an interpretation may be valid, for this paper I would like to confine my discussion to "chemical repellents" -- materials that, when applied to seeds, plants, or other materials being damaged by animals, will reduce depredation through taste, odor, or possibly …


Animal Control - Progress, Problems And Professionalism, Robert M. Sutton Jr. Mar 1967

Animal Control - Progress, Problems And Professionalism, Robert M. Sutton Jr.

Vertebrate Pest Conference Proceedings: 3rd (1967)

I want to take some liberty with my title as it is rather general. Specifically, I want to discuss some matters of mutual concern, and I will touch lightly upon our Division's activities and the status of our reorganization and redirection. In so doing, I do not propose to rehash the several talks that have been previously given and the papers written on what's new in animal control. Rather, I shall use this opportunity to examine a few problems that confront our Division, and in many cases, that confront everyone concerned with vertebrate pest control. We are now, in a …


Rats, Bombs, And Paradise - The Story At Eniwetok, William B. Jackson Mar 1967

Rats, Bombs, And Paradise - The Story At Eniwetok, William B. Jackson

Vertebrate Pest Conference Proceedings: 3rd (1967)

At Eniwetok Atoll in the Marshall Islands, rats have been involved in an intriguing story. Polynesian rats were probably the only rodents present until after World War 11 when roof rats were brought in along with supplies and equipment for the atomic test program in the late 40's or early 50's. Some islets of the atoll, originally covered with coconut plantations, were denuded by heat, shock, and tidal waves following the detonation of devices. Initially radiation levels were high, but radioactive decay and dilution reduced the radiation hazard, and today the background radiation is well within the safe range. Many …


Blackbirds - Depredation, Research And Control In Ohio And The Midwest, Thomas M. Stockdale Mar 1967

Blackbirds - Depredation, Research And Control In Ohio And The Midwest, Thomas M. Stockdale

Vertebrate Pest Conference Proceedings: 3rd (1967)

The earliest settlers in Ohio and the Midwest suffered losses to birds. First it was animal losses to birds of prey, then crop losses to passenger pigeons. Today it is blackbirds! In 1900, F. E. L. Beal conducted an analysis of the digestive tracts of blackbirds collected in the Midwest and found that the preferred food in the summer months was soft seeds. A similar study which I conducted on redwinged blackbirds in 1959 showed that 90% of their diet was composed of soft seeds, primarily milk and dough stage corn during the late summer and early fall. Presently we …