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203
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Operation of the multi-stage flash distillation plant, San Diego, California, third report (semi-annual)
Report describing the MSF/VTEX Distillation Plants at the San Diego Test Facility of the Office of Saline Water for the purpose of advancing and developing the state of the art of flash distillation plants and thereby reducing the cost of seawater conversion.
Date:
1971
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Development of a Thin-Liquid-Film Membrane Device for Reverse Osmosis
Report issued by the Office of Saline Water over studies conducted on reverse-osmosis plants. The results of the studies are presented and discussed. This report includes tables, and illustrations.
Date:
April 1971
Creator:
Davies, D. S.; Bemberis, I.; Wong, Chung-ming; Savage, W. F. & Channabasappa, K. C.
Object Type:
Report
System:
The UNT Digital Library
Blasting Vibrations and Their Effects on Structures
Report issued by the Bureau of Mines over the effects of air blast vibrations. As stated in the abstract, "this report presents the results of the Bureau of Mines 10-year program to study the problem of air blast and ground vibrations generated by blasting" (p. 1). This report includes tables, and illustrations.
Date:
1971
Creator:
Nicholls, Harry R.; Johnson, Charles F. & Duvall, Wilbur I.
Object Type:
Report
System:
The UNT Digital Library
ABSOLUTE ASYMMETRIC SYNTHESIS. I. ON THE MECHANISM OF THEPHOTOCHEMICAL ABSOLUTE ASYMMETRIC SYNTHESIS OF HELICENES WITH CIRCULARLYPOLARIZED LIGHT. . WAVELENGTH DEPENDENCE OF THE OPTICAL YIELD OFOCTAHELICENE.
The synthesis of nonracemic yields of hexa-, hepta-, octa-, and nonhelicene with circular light was observed, and the structural and wavelength dependence of the induced optical yields was examined. The results obtained, together with a detailed consideration of the mechanism of helicene synthesis from the parent diarylolefins, indicate that the induced optical activity is due to selective reaction of enantiomeric conformations of the parent cis diarylolefins by circular light.
Date:
May 1, 1971
Creator:
Bernstein, William J.; Calvin, Melvin & Buchardt, Ole.
Object Type:
Article
System:
The UNT Digital Library
SEARCH FOR MAGNETIC MONOPOLES IN LUNAR MATERIAL
None
Date:
June 1, 1971
Creator:
Eberhard, Philippe H.; Ross, Ronald R.; Alvarez, Luis W. & Watt,Robert D.
Object Type:
Article
System:
The UNT Digital Library
SPECIFIC PROTONATION OF THE CARCINOGEN 7, 12-DIMETHYIBENZ [a]ANTHRACENE AND CHARGE LOCALIZATION IN THE a-COMPLEX
In the class of the polycondensed aromatic hydrocarbons, the concept of localized charge in a {sigma}-complex, e.g., the carbonium ion formed by addition of a proton or other electrophile to an aromatic ring, has so far received experimental evidence only in the case of anthracene. The ultraviolet spectrum of this compound in sulfuric acid is similar to that of the benzhydryl cation. Ph{sub c}C{sup +}Me. This result implies the protonation of anthracene at one meso-carbon atom and the localization of the positive charge at the other. The {sigma}-complex of the potent carcinogen 7,12-dimethylbenz[a]anthracene (DMBA) in acidic medium offers another example of this type of charge localization. The determination of structure was achieved by comparing the NMR spectra of DMBA in neutral and acidic solvents. The ratio of the integrated intensities of the proton peaks in the spectrum of DMBA is, from right to left, 3:3:5:1:1:2:1. The assignment of the 7-CH{sub 3} ({sigma}3.00) and 12-CH{sub 3} ({sigma}3.29) resonances was made by comparison with the spectra of 7-methylbenz[a]anthracene (7-CH{sub 3}, {sigma}3.03) and 12-methylbenz[a]anthracene (12-CH{sub 3}, {sigma}3.32) under the same conditions. A good general correlation exists between the methyl chemical shifts of the twelve monosubstituted methylbenzanthrancenes and the corresponding aryl protons of benzanthracene.
Date:
April 1, 1971
Creator:
Cavalieri, Ercole & Calvin, Melvin.
Object Type:
Report
System:
The UNT Digital Library
PHOTOCHEMICAL COUPLING OF BENZO [a]PYRENE WITH 1-METHYL-CYTOSINE;PHOTO-ENHANCEMENT OF CARCINOGENICITY
Irradiation of the carcinogenic benzo[a]pyrene (I) with 1-methylcytosine hydrochloride IIa (molar ratio 1:10) at 3500 {angstrom} in methanol-acetone produces the 6-(1-methylcytos-5-yl)-benzo[a]pyrene (III). The structure of the product shows the hydrocarbon bound through the most active 6-carbon atom to the nucleophilic 5-position of the base. In the second part, the possibility of observing carcinogenic effects on the mouse skin from non-carcinogenic hydrocarbons under the action of UV light is investigated. Both experiments provide evidence that the 4,5-double bond (K region) of I presumably does not play a role in triggering the cancer process.
Date:
January 1, 1971
Creator:
Cavalieri, E. & Calvin, Melvin.
Object Type:
Report
System:
The UNT Digital Library
Mechanism Op Action Op P-Hydroxybenzoate Hybrozylase Frompseudomonas Putida. Iii. The Enzyme-Subtrate Complex
The mechanism of action of p-hydroxybenzoate hydroxylase from Pseudomonas putida, strain M-6, has been investigated. The aromatic substrate analogues, benzoate, p-fluorobenzoate, p-chlorobenzoate, p-nitrobenzoate, p-aminobenzoate, and 6-hydroxynicotinate, are found to be competitive inhibitors. This finding differs from the previously reported noncompetitive behavior in a different buffer system. The optical activity of the enzyme-inhibitor complex is studied. From the kinetic and circular dichroism (CD) measurements, they have found that the carboxyl moiety is necessary and sufficient for the enzyme-substrate binding, whereas the hydroxyl group alone will not lead to binding. There are two classes of inhibitory analogues: one causes changes in CD spectra of the enzyme similar to those evoked by the substrate, and the other does not cause significant changes. the results indicate that more than one mode of enzyme-inhibitor interaction is involved. The CD of the enzyme-NADPH complex under anaerobic conditions suggests that the oxidized enzyme and reduced pyridine nucleotide form a complex, both in the absence and presence of the substrate, p-hydroxybenzoate. Furthermore, evidence for a ternary complex is given.
Date:
April 1, 1971
Creator:
Teng, Nelson N. H.; Kbtovycz, George; Calvin, Melvin & Hosokawa, Keiichi
Object Type:
Report
System:
The UNT Digital Library
BEAM-SURROUNDING INTERACTIONS AND THE STABILITY OF RELATIVISTIC PARTICLE BEAMS
In accord with recent custom, the organizing committee for this conference has scheduled this review paper on beam instabilities. In view of the various review papers which already exist and the fact that the fundamentals of the subject have even been treated in a textbook, I thought this paper might best be devoted to a limited part of the rather large field of beam instabilities. Thus, I have selected only an aspect of the general subject, but an aspect which has during the last years been very much at the center of activity, and will--if my judgment is correct--be even more so in the years to come. I wish to concentrate, here, on the interaction of a relativistic particle beam with itself which is a result of the coupling of the beam with its surroundings. Before approaching this topic, a few remarks on the existing review papers are in order. A comprehensive treatment of beam instabilities may be found in Ref. 1, where, also, the reader will find some 48 references to the original literature. In Refs. 2 and 3, the General subject is approached from other points of view. Reference 4 is concerned with some special topics, but treats …
Date:
February 1, 1971
Creator:
Sessler, Andrew M.
Object Type:
Article
System:
The UNT Digital Library
An Analog Method for Measuring the Longitudinal Coupling Impedance of a Relativistic Particle Beam With Its Environmnet
The stability of a coasting beam against self-bunching (negative mass instability) may be expressed in terms of a beam coupling impedance. The impedance has contributions from self-fields, wall impedance, and curvature effects. This paper describes procedures for measuring the wall and curvature contributions to the coupling impedance by means of an analog in which the beam is replaced by a conductor propagating a TEM-like mode. Conditions are derived under which the measurements are valid, various measurement procedures are described and results of the application of the method to the compressor of an electron ring accelerator are reported.
Date:
August 1, 1971
Creator:
Faltens, A.; Hartvig, E. C.; Mohl, D. & Sessler, A. M.
Object Type:
Report
System:
The UNT Digital Library
ORBITAL SYMMETRY CONTROL IN THE NITRONE-OXAZIRIDINE SYSTEM.NITRONE PHOTOSTATIONARY STATES
Recent the orbital symmetry rules have been shown to apply to hetero-atom systems such as nitrone thermal cycloaddition reactions and the thermal and photochemical aziridine ring cleavage at the C-C bond. The concerted photocyclization is disrotatory and the reverse thermal cleavage is conrotatory in these molecules with four {pi} electrons. In contrast to the azomethine ylide-aziridine system, the stereochemistry of the nitrone photocyclization to oxaziridine can only be observed on carbon and nitrogen atoms because the oxygen atom has lone pair electrons instead of substituents. For the reverse thermal ring opening of oxaziridine to the nitrone, the two possible conrotatory motions of C-O bond cleavage should result in a mixture of the cis and trans-isomers of the nitrone, in contrast to the photoclosure which should be stereospecific.
Date:
June 1, 1971
Creator:
Splitter, Janet S.; Su, Tah-mun; Ono, Howard & Calvin, Melvin.
Object Type:
Article
System:
The UNT Digital Library
SPECTROSCOPIC INVESTIGATION OF THE INHIBITORY EFFECT OF FATTYACIDS ON PHOTOSYNTHETIC SYSTEMS
Fatty acids have a reversible inhibitory effect on respiration and on photosynthetic action. They investigated the influence of octanoic acid on the photosynthetic bacteria Rhodopseudomonas spheroids R-26. From the spectroscopic data they conclude that a less efficient energy transfer and decoupling of the light harvesting pigment system from the energy converting reaction center is responsible for the inhibitory effect.
Date:
May 1, 1971
Creator:
Steffea, Hans & Calvin, Melvin.
Object Type:
Article
System:
The UNT Digital Library
A Liquid-filled Proportional Counter
We report properties of single-wire proportional chambers and multiple-wire ionization chambers filled with liquid xenon. Proportional multiplication is seen for anode fields > 10{sup 6} volts/cm (anode-cathode voltage> 1 kV for a 3.5-{micro}-diam anode wire). The efficiency for detecting ionizing radiation is {approx} 100%. The time resolution of the chambers is {+-} 10{sup -7} sec. We attained a spatial resolution of {+-} 15 {micro} with a multiwire ionization chamber, considerably better than that of any other real-time particle detector.
Date:
June 1971
Creator:
Muller, Richard A.; Derenzo, Stephen E.; Smadja, Gerard; Smith, Dennis B.; Smits, Robert G.; Zaklad, Haim et al.
Object Type:
Article
System:
The UNT Digital Library
The Use of rf-Knockout for Determination of the Characteristics of the Transverse Coherent Instability of an Intense Beam
The response of an intense beam of interacting particles to a deflecting rf-signal is computed theoretically and shown to be closely related to transverse coherent beam stability. It is shown that the beam response to sinusoidal excitation provides a direct measure of the stability of beam modes for given machine conditions (beam intensity, octupole current, sextupole current, momentum spread, etc.). This measurement includes the properties of the beam surroundings as well as the frequency spread effective for Landau damping. Since it is generally difficult to evaluate theoretically the wall and beam properties that enter into stability calculations, the information which can be obtained from rf excitation experiments should be very valuable; especially in devising practical procedures for reducing the severity of coherent transverse instabilities.
Date:
August 1971
Creator:
Möhl, Dieter & Sessler, Andrew M.
Object Type:
Report
System:
The UNT Digital Library
THE EFFECT OF RIFAMPICIN, AND TWO DERIVATIVES, ON CELLS INFECTEDWITH MOLONEY SARCOMA VIRUS
It is shown that rifampicin, and especially its relative dimethyl-N-benzyl-N-desmethyl rifampicin, can inhibit focus formation by Moloney sarcoma virus on BALB/3T3 tissue cultures. At a dose level of 10 {micro}g/ml DMB appears to totally inhibit focus formation while reducing virus replication by at least a factor of fifty and cell proliferation by only a factor of three. These observations, taken together with those of others, suggest a role for the hybrid RNA-DNA dependent DNA polymerase and the gene for its synthesis both in normal cell processes and in the transformation process.
Date:
March 1, 1971
Creator:
Calvin, Melvin.; Joss, Urs R.; Hackett, Adeline J. & Owens, RobertB.
Object Type:
Report
System:
The UNT Digital Library
The Wild Horse Controversy
This report addresses the Wild Horse Controversy.
Date:
February 8, 1971
Creator:
Shaw, Elmer W.
Object Type:
Report
System:
The UNT Digital Library
Women in the United States Congress
Report
Date:
April 21, 1971
Creator:
Holcomb, Morrigene
Object Type:
Report
System:
The UNT Digital Library
Selected Annotated Bibliography on the Geochemistry of Gold
A bibliography of about 200 selected references which contain information on source materials dealing with the genesis and geochemistry of gold and geochemical prospecting for gold deposits.
Date:
1971
Creator:
Cooper, Margaret
Object Type:
Report
System:
The UNT Digital Library
Stratigraphy of the State Bridge Formation in the Woody Creek Quadrangle, Pitkin and Eagle Counties, Colorado
A report about the lithologic units within a red-bed sequence that help to interpret the history and structure of the Woody Creek quadrangle, west-central Colorado.
Date:
1971
Creator:
Freeman, Val I.
Object Type:
Report
System:
The UNT Digital Library
Clinoptilolite of Possible Economic Value in Sedimentary Deposits of the Conterminous United States
A report about clinoptilolite. It is a common zeolite, it is potentially valuable for many industrial and agricultural processes, and it might be useful in controlling water pollution by removing ammonia from wastewater.
Date:
1971
Creator:
Sheppard, Richard A.
Object Type:
Report
System:
The UNT Digital Library
Fuel bundle, control rod, and neutron source specifications
Data are provided for the ordering of fuel assemblies for the LOFT reactor. (JDB)
Date:
December 9, 1971
Creator:
Russell, M.L.
Object Type:
Report
System:
The UNT Digital Library
Facility requirements document: NRDS test cell C single NERVA turbopump facility
This document contains basic facility requirements needed to scope the facility engineering and modification activities related to the NERVA single turbopump testing to be conducted at Test Cell C, NRDS.
Date:
October 1, 1971
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Manual of data-analysis programs for charged-particle reactions. [AUTOFIT, for fitting emulsion data]
This report contains additions and changes to the original report. Most of the changes relate to improvements in the programs. In addition to the changes, Section VII of the original report, Program AUTOFIT, is reproduced in its entirety. (RWR)
Date:
September 1, 1971
Creator:
Comfort, J.R.
Object Type:
Report
System:
The UNT Digital Library
Dissipation of the reactor heat at the Savannah River Plant
The effluent cooling water from the heat exchangers of the Savannah River nuclear reactors is cooled by natural processes as it flows through the stream beds, canals, ponds, and swamps on the plant site. The Langhaar equation, which gives the rate of heat removal from the water surface as a function of the surface temperature, air temperature, relative humidity, and wind speed, is applied satisfactorily to calculate the cooling that occurs at all temperature levels and for all modes of water flow. The application of this equation requires an accounting of effects such as solar heating, shading, mixing, staging, stratification, underflow, rainfall, the imposed heat load, and the rate of change in heat content of the body of water.
Date:
October 1, 1971
Creator:
Neill, J. S. & Babcock, D. F.
Object Type:
Report
System:
The UNT Digital Library