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Articles 287431 - 287460 of 292790
Full-Text Articles in Physical Sciences and Mathematics
Distribution Of Ammonia Nitrogen In The Lower York River, Virginia : Spring, 1961, Bernard C. Patten, Virginia Fisheries Laboratory, Virginia Institute Of Marine Science
Distribution Of Ammonia Nitrogen In The Lower York River, Virginia : Spring, 1961, Bernard C. Patten, Virginia Fisheries Laboratory, Virginia Institute Of Marine Science
Reports
No abstract provided.
An Experimental Investigation Of Coloring Matter In Canna Indica Flowers, James Clinton Vogt
An Experimental Investigation Of Coloring Matter In Canna Indica Flowers, James Clinton Vogt
University of the Pacific Theses and Dissertations
The research was carried out for the purpose of isolating and identifying the coloring matter in flowers of the canna indica (canna lily) variety. It was done by extracting the pigment from flower petals with methanol, amyl alcohol, and other solvents, and crystallizing the pigment as a salt. Physical properties such as solubility, color reactions, spectra and others were examined for this pigment. Chemical properties and degradation products were also examined in order to identify the chemical structure of the pigment.
A Kinetic Study Of The Base Catalyzed Esterification Of Propionic Anhydride With Isopropyl And N-Propyl Alcohols Using A High Frequency Oscillometer, Carl Joel Abraham
A Kinetic Study Of The Base Catalyzed Esterification Of Propionic Anhydride With Isopropyl And N-Propyl Alcohols Using A High Frequency Oscillometer, Carl Joel Abraham
University of the Pacific Theses and Dissertations
The purpose of this research project is to investigate the base catalyzed reaction of propionic anhydride with n-propyl and isopropyl alcohols using a high frequency (120 megacycles) oscillometer to follow the course of the reaction as it proceeds.
The high frequency oscillometer has been used for many types of analytical determinations, and a review of the work up to 1957 is available in a publication by E. H. Sargent Company. The oscillometer has found application in titrations (Hall 1952), analysis of binary systems (Thomas, Faegin, and Wilson 1951) , static ternary systems (West, Robickaus, and Burkhalter 1951) , the study …
Analysis Of The A3(X3)3 Nuclear Spin System And -Electron Coupled Hyperfine Splitting Constants In Aromatic Hydrocarbons, Juana Acrivos
Analysis Of The A3(X3)3 Nuclear Spin System And -Electron Coupled Hyperfine Splitting Constants In Aromatic Hydrocarbons, Juana Acrivos
Faculty Publications, Chemistry
The nuclear spin functions for the A3(X3)3 system have been developed and used to analyse the NMR spectra of (CH3)3C6H3 and (CF3)3C6H3. The π-electron coupled hyperfine splitting constants, obtained from the Ramsey theory with simple Hückel M.O.'s for benzene and without the assumption of an average energy of excitation for the virtual processes which give rise to the coupling, are in agreement with the hyperfine constants observed between the methyl groups and the ring protons in the above compounds.
The Carbon Compounds Of The Primeval Atmosphere, James Sherman Rogers
The Carbon Compounds Of The Primeval Atmosphere, James Sherman Rogers
University of the Pacific Theses and Dissertations
The question of how and when life originated on t his planet has always been an intriguing one, exceeded perhaps in fascination only by that area of speculation which concerns itself with death and the afterlife . The latter problem has generally been approached along theological lines; the former problem , that of the origin of life, has been widely investigated along scientific lines as well . Indeed, the origin of life has always been one of the fundamental problems of science, and the increasingly sophisticated answers to the problem reflect the increasing potence and applicability of the methods of …
Identification Of The Products And Mechanism Of Decomposition Of Thiazate, Paul Edward Williams
Identification Of The Products And Mechanism Of Decomposition Of Thiazate, Paul Edward Williams
University of the Pacific Theses and Dissertations
This work is an additional facet of the research undertaken by Dr. Herschel Frye of the Department of Chemistry of the University of the Pacific while he was a graduate student at the University of Oregon. Frye succeeded in making an analytical reagent for zinc and other transition metals similar to dithiszone but water soluble. His approach was to to sulfonate the benzene rings thus giving water solubility because of the ionic nature of the sulfonic acid. The new reagent-tensed thiazate--was quite successful in its purpose, but the sections of the compound were somewhat different than dithizone. The purpose of …
Identification Of The Products And Mechanism Of The Disproportionation Of Di(P-Sulfonic Acid)Phenylthiocarbazide, Ralph Lee Riggs
Identification Of The Products And Mechanism Of The Disproportionation Of Di(P-Sulfonic Acid)Phenylthiocarbazide, Ralph Lee Riggs
University of the Pacific Theses and Dissertations
It is the purpose of this paper to separate and identify the products resulting from treatment of this compound with strong base. This will be done using both column and paper chromatography, and through interpretation of infrared spectra. In addition, a discussion of the structure of the complexes of heavy metals with di(p-sulfonic acid) phenylthiocarbazide in basic solution will be presented.
Correcting Cobalt Deficiency, Laurence C. Snook
Correcting Cobalt Deficiency, Laurence C. Snook
Journal of the Department of Agriculture, Western Australia, Series 4
COBALT is essential in the food eaten by sheep and cattle. As little as one part of cobalt in 10,000,000 parts of food appears to be adequate.
But if this mere trace is missing, ruminants will waste away and die, even when the feed appears excellent In every other way.
Manage Your Rainfall For Maximum Production, J E. Watson
Manage Your Rainfall For Maximum Production, J E. Watson
Journal of the Department of Agriculture, Western Australia, Series 4
TTOW much would an extra inch of rainfall be worth to you? Much sloping land loses this much and more by run-off every year.
The soil is the main asset of your farm, but your profits depend on how you manage the rain which falls on it.
Fallowing And Soil Conservation, J E. Watson
Fallowing And Soil Conservation, J E. Watson
Journal of the Department of Agriculture, Western Australia, Series 4
Soil Conservationists don't always disapprove of fallowing, says Soil Conservation Service adviser J. E. Watson.
They are prepared to compromise, and accept fallowing as a useful practice where it means better pasture establishment or more effective land reclamation.
Thirsty Cows Are Poor Milkers, S R. Dunstan
Thirsty Cows Are Poor Milkers, S R. Dunstan
Journal of the Department of Agriculture, Western Australia, Series 4
THE HOT summer weather is not far away, and now is a good time for the whole milk producer to attend to those points which will ensure that milk production is maintained at a high level during this period.
Hydrographic, Nutrient, Chlorophyll, Seston And Cell-Count Data From Chesapeake Bay Plankton Cruises Of R/V Pathfinder And R/V Observer : January 1960 - January 1961, Bernard C. Patten, Virginia Fisheries Laboratory
Hydrographic, Nutrient, Chlorophyll, Seston And Cell-Count Data From Chesapeake Bay Plankton Cruises Of R/V Pathfinder And R/V Observer : January 1960 - January 1961, Bernard C. Patten, Virginia Fisheries Laboratory
Reports
No abstract provided.
Synthesis Of Acetyl Acetophenone, Hampton D. Proett
Synthesis Of Acetyl Acetophenone, Hampton D. Proett
University of the Pacific Theses and Dissertations
The keytones are representative of one of the large groups of compounds of Organic Chemistry. Phenyl-methyl-ketone is the simplest representative of the mixed aliphatic-aromatic ketones. It is a member of a group of compounds which are soporific and hypnotic and are used in medicine as sleep producers and sedatives. It is found to a small extent in coal tar. It has basic properties and is extracted from the heavy oil of coal tar with sulfuric acid.
The purpose of this research is to synthesize one of the compounds which is not present in the compilation of the natural lists and …
M-Aminocyclohexanol, Leroy Mancel Law
M-Aminocyclohexanol, Leroy Mancel Law
University of the Pacific Theses and Dissertations
There has developed in recent years an interest in chemical materials that may have the ability to concentrate in and about carcinomic tissue.
Construction And Calibration Of Equipment For Obtaining Heat Capacity Data At High Temperatures, David Wells Wood
Construction And Calibration Of Equipment For Obtaining Heat Capacity Data At High Temperatures, David Wells Wood
University of the Pacific Theses and Dissertations
This is a study of the heat capacity substances at high temperatures at determined by means of drop-calorimetry. The heat capacity may be defined as the quantity of heat required to raise the temperature of a substance by 1o C. This can be expressed as [see PDF file for formula]. The concept of heat capacity is used in connection with a certain defined path such as those of constant volume or constant pressure. The following definitions apply: [see PDF file for formula] = heat capacity at constant volume and [see PDF file for formula] = heat capacity at constant …
A Study At A Mach Number Of 2.01 Of The Shock Boundary-Layer Interaction Resulting From The Deflection Of A Wedge Mounted On A Bypass Plate, Emma Jean Landrum
A Study At A Mach Number Of 2.01 Of The Shock Boundary-Layer Interaction Resulting From The Deflection Of A Wedge Mounted On A Bypass Plate, Emma Jean Landrum
Dissertations, Theses, and Masters Projects
No abstract provided.
A Rational Approach To The Estimation Of Evaporation And Evapotranspiration From Climatological Data, Jerald Emmet Christiansen, B. B. Patil
A Rational Approach To The Estimation Of Evaporation And Evapotranspiration From Climatological Data, Jerald Emmet Christiansen, B. B. Patil
Reports
Many attempts have been made to derive mathematical expressions relating evaporation and evapotranspiration, or consumptive use, to climatological data. IN the United States, the Blaney-Criddle formula is probably the best known for estimating consumptive use (2 and 3). Blaney (1) has also suggested that this formula is suitable for estimating evaporation as measured with a Weather Bureau pan. Other well known formulas are the Penman formulas (10), the Thornthwaite formula (15) and the Hargreaves formulas (8). Halkias, Beihmeyer and Hendrickson (6) suggest that water requirements of crops can be determined from atmometer data. Lowry and Johnson (() in an early …
Hydrographic Data From The Atlantic Plankton Cruises Of The R/V Pathfinder, December 1959 - December 1960, Edwin B. Joseph, William H. Massmann, John J. Norcross
Hydrographic Data From The Atlantic Plankton Cruises Of The R/V Pathfinder, December 1959 - December 1960, Edwin B. Joseph, William H. Massmann, John J. Norcross
Reports
The data included in this report have resulted from a series of monthly offshore cruises conducted by the Ichthyology Research Section. The cruises were made to obtain information on the distribution and abundance of pelagic eggs and larvae of fishes. Since the biological results will be reported in a series of separate papers (Joseph, Massmann and Norcross, 1961), it was felt that the raw hydrographic data shpuld be made available in a single source.
The area covered is approximately 2500 square nautical miles of the neritic zone within the 20-fathom contour. The shore line encompasses the mouth of Chesapeake Bay …
The Estimation Of Parameters In Regression Functions Subject To Certain Restraints, Paul D. Minton, Alfred E. Crofts Jr.
The Estimation Of Parameters In Regression Functions Subject To Certain Restraints, Paul D. Minton, Alfred E. Crofts Jr.
Journal of the Graduate Research Center
We consider two types of problems in maximum likelihood estimation of parameters of linear functions subject to certain restraints. One is a family of lines with equal slopes or intercepts; the other is a pair of lines constrained to meet at a predetermined point. In the case of normally distributed errors with equal variances within each set, the solutions are identical with least squares solutions. In addition to linear functions, non-linear functions which are transformable to linearity may be treated under these methods.
Lower James River Pollution Study, City Point To Chickahominy, August 6 - September 6, 1951 : A Preliminary Report Of Findings, Conclusions And Recommendations, William H. Massman, Ernest C. Ladd
Lower James River Pollution Study, City Point To Chickahominy, August 6 - September 6, 1951 : A Preliminary Report Of Findings, Conclusions And Recommendations, William H. Massman, Ernest C. Ladd
Reports
Hopewell,m Virginia.is ·a highly industrialized city, the Celanese Corporation of .America, the Continental Can Company, the Hercules Powder Company and the Solvay Process: Division of· Allied Chemical and Dye Corporation having plants there. All of these plants have industrial and human wastes, the combined amount of which is great from. the standpoint of both volume and strength. In addition, there. are human wastes from the City cf Hopewell and its suburbs in Prince George County and from Camp Lee. All of those wastes, sewage and industrial are discharged into the James River, Bailey Creek and into other tributaries of the …
Model Analysis Of Spillway And Stilling Basin Of Porcupine Dam, Gordon H. Flammer, C. Earl Israelsen
Model Analysis Of Spillway And Stilling Basin Of Porcupine Dam, Gordon H. Flammer, C. Earl Israelsen
Reports
Introduction: The Engineering Experiment Station at Utah State University was engaged by the Utah Water and Power Board to make a model analysis of the spillway and stilling basin of the Porcupine Dam. This dam will be located on the East Fork of Litle Bear River, just east of Avon, Utah. It will be approximately 650 feet long and 160 feet high, composed of zones earth fill with rock rip-rap facing. The spillway will have a reinforced concrete inlet section and the remainder of the chute and stilling basin will be excavated out of the rock and leck unlined. The …
Analysis Of A Vertically Rising Vehicle, Sheldon Baron
Analysis Of A Vertically Rising Vehicle, Sheldon Baron
Dissertations, Theses, and Masters Projects
No abstract provided.
Certain Features Of Alteration In The Michigan Lavas And Their Genetic Interpretation, Peethambaram Doraibabu
Certain Features Of Alteration In The Michigan Lavas And Their Genetic Interpretation, Peethambaram Doraibabu
Masters Theses
"The origin of the alteration and copper mineralization in the Keweenawan lavas of the Upper Peninsula of Michigan is one of the well known controversial topics in Economic Geology. The literature on this problem is most extensive and an attempt was made in this thesis to first review as many aspects of the discussion as appeared to be necessary. This portion is necessarily extensive, and it is hoped that some new light has been thrown here on some patterns of approach or thought which, today, can hardly be called scientific.
Next, the observations made in the field, on hand specimens …
Sedimentary Features And Geochemistry Of The Sulphide Facies In The Transition Between The Lamotte Sandstone And The Bonneterre Formation In The Fredericktown Area, Madison County, Missouri, Farouk El Baz
Masters Theses
"SCOPE AND PURPOSE The Lead Belt area of southeast Missouri, which is nearly 40 km. long and 10 km. wide, is considered, at the present time, the most important lead district in the world. Lead has been mined in this area by the natives prior to 1720, and almost continuously up to the present day. A variety of sulphides are mined from different places in the district.
The sulphide deposits in the Lead Belt are considered to be typical examples of the Mississippi Valley Type Deposits, which are distributed all over the world. As in practically all the Mississippi Valley …
The Determination Of Ethanol In Aqueous Solution By Gas-Liquid Partition Chromatography, Robert L. Morrison
The Determination Of Ethanol In Aqueous Solution By Gas-Liquid Partition Chromatography, Robert L. Morrison
University of the Pacific Theses and Dissertations
The present chemical and physical methods for the determination of ethyl alcohol are all subject to systematic errors derived from any of a number of interfacing substances usually present in solution with the ethanol. Some of the most popular methods are slow and tedious and require a good deal of skill and technique to perform. The dichromate (2), pycnometer and refractometer methods are three such methods. The interfering substances most often present in industrial and food products are fusel oils and acetaldehyde. These substances interfere in the three methods just mentioned. It is of course possible to analyze for these …
Cosmology And Galactic Angular Momenta, Marmion Michael Richard Hays
Cosmology And Galactic Angular Momenta, Marmion Michael Richard Hays
University of the Pacific Theses and Dissertations
The plan of this paper is to present some observations and then in subsequent chapters to examine the two basic cosmological ideas in the light of these observations.
The first of the observations involves an estimate of the angular momentum in a given volume of space and the ratio of this momentum to the mass or number of nucleons in the given volume. We therefore wish to obtain a rough estimate of the angular momentum in that part of the universe which man may call his immediate surroundings, i.e., the solar system and galaxy.
The Magnetic Monopole, Thomas E. Kemple
The Magnetic Monopole, Thomas E. Kemple
Masters Theses
"Since Dirac has shown that the concept of a magnetic monopole follows from the fundamental laws of quantum mechanics and that it imposes quantization of electric charge, one has reason for taking the magnetic monopole seriously. Such particles, if they exist, would also give symmetry to Maxwell's equations.
A comprehensive review of the literature is presented and all known properties of magnetic poles are discussed. Scattering of mono- poles by heavy nuclei is analyzed in detail and definite mathematical relations are established. All previous experimental work known is outlined and discussed. Definite criteria for identification of monopole tracks in a …
A Theoretical Investigation Of Periodic Precipitation, Jack M. Scrivner
A Theoretical Investigation Of Periodic Precipitation, Jack M. Scrivner
Masters Theses
"The problem of periodic precipitation in solution or gel is considered from the standpoint of supplementing the simple diffusion equation with chemical reaction rate terms. This addition has the effect of making the differential equations of the process non-linear.
The system of equations admits of a periodic, steady-state solution under certain conditions, but lack of experimental values for the parameters prohibits a definite statement as to whether or not the model is valid"--Abstract, page ii.
Normal Incidence - Grazing Incidence Spectrograph For The Vacuum Ultraviolet, J. Kirston Henderson
Normal Incidence - Grazing Incidence Spectrograph For The Vacuum Ultraviolet, J. Kirston Henderson
Masters Theses
"Presentation of Design.
This thesis presents the design for a combination normal incidence - grazing incidence spectrograph for use in the vacuum ultra-violet and soft x-ray portions of the electromagnetic spectrum. The instrument described was designed and constructed as a partial fulfillment of the requirements for the master of science degree from The Missouri School of Mines and Metallurgy.
Design Details.
Included in this thesis is a complete set of all detailed drawings and information required for either effective use or duplication of this instrument. Complete discussions of the design, operating procedures, difficulties encountered during construction and suggestions for future …
Certain Trace Element Distribution In The Searchlight, Nevada Quartz Monzonite, Clark County, Nevada, Jai Nandan Shrivastava
Certain Trace Element Distribution In The Searchlight, Nevada Quartz Monzonite, Clark County, Nevada, Jai Nandan Shrivastava
Masters Theses
"The once prosperous gold, silver, copper and lead mines of the Searchlight mining district, Nevada, are situated along the south and western margins of a large quartz monzonite body. This intrudes the Precambrian gneisses and younger lava flows. Associated mineral veins show an eccentric type of zoning around the intrusive.
Seven rock samples of the quartz monzonite representing different parts of the intrusive were analyzed petrographically and spectrographically. Modal analyses and various types of rock alteration were investigated petrographically. Spectrochemical analyses of the rock samples and their major minerals were carried out for certain trace elements. A semi-quantitative method was …