Dibenzanthracene, labeled in the 9 and 10 positions with carbon fourteen has been administered to mice intravenously and by stomach tube as an aqueous colloid, and intraperitoneally, subcutaneously, and by stomach tube in tricaprylin solution. The distribution of radioactivity in the mice at various time intervals after administration of the carcinogen has been determined. The radioactivity is rapidly eliminated, largely through the feces, and ordinarily very little is absorbed. The distribution and rate of elimination depends upon the mode of administration. There is an appreciable quantity of radioactivity in tumors produced several months after a single subcutaneous injection of dibenzanthracene. There appear to be no detectable effects from the radiation of the labeled carcinogen.

This report describes the design and testing of a 1.17-Bev/c separated K{sup -} beam designed in the fall of 1958 in connection with a 15-in. hydrogen bubble chamber experiment. At the target the K{sup -}/{pi}{sup -} ratio was 1/140. At the chamber, 4.0 K{sup -}-meson decay lengths from the target, and after two stages of electromagnetic separation, the K{sup -}/{pi}{sup -} ratio was 12.5, corresponding to a total pion suppression by a factor of about 10{sup 5}. The K{sup -} flux at the chamber was 0.87 K{sup -} mesons per 10{sup 10} protons impinging on the target.

Selective occlusions of straight-chain paraffins in the presence of branched-chain hydrocarbons by naturally occurring zeolites of suitable dimension was reported as early as 1944 by Barrer and Ibbitson. More recently the capacity of synthetic zeolites or molecular sieves to absorb exclusively the straight-chain hydrocarbons from complex hydrocarbon mixtures has found extensive application in the petroleum industry. Under the conditions developed for most sieving operations any normal olefins present are occluded along with the normal paraffins. A supplemental separation technique must be employed to obtain n-paraffins free of olefins.

It was noted previously that 3-(p-dimethylamino)-2-phenyloxaziridine (I) and 3-(p-dimethylamino)-2-(m-nitrophenyl)oxaziridine were photosensitive. Further study on the irradiation (in a variety of solvents under nitrogen) of (I), 2,3-diphenyloxaziridine (II), and 3-(p-nitrophenyl)-2-phenyloxaziridine (III) indicates the major photoreaction to be cleavage to the aldehyde and an intermediate which forms aniline and azobenzene. There is also formed in the photolysis varying amounts of the corresponding anilide. A table provided gives the yields in three different solvents.

Article by Art Buchwald on Spiro T. Agnew using derogatory names for ethnic groups.

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Article regarding a reunion for former teachers and students of the Palo Pinto School, including location and a list of event officers. A brief history of the school is included.

From Gordon Conference; Tilton. New Hampshire, USA (22 Aug A brief discussion of magnetic field generation in laser-pellet interactions is given. Proposed target experiments to study these interactions are described in detail. Some data from typical laser--pellet interactions are theoretically derived. The data are given for various experimental parameters. (MOW)

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From nuclear science symposium; San Francisco, California, USA (14 Nov 1973). Metal-oxide-semiconductor devices have been evaluated as lowenergy (250 eV to 50 keV) x-ray dosimeters. They can be used to measure dosages as low as 1 rad (SiO/sub 2/) to as high as 10/sup 5/ rad (SiO/sub 2/). Their small size and basic simplicity make it possible to form arrays of dosimeters for x-ray imaging. When compared to thermoluminescent dosimeters (TLD's), photographic film, and thermopiles, MOSFET dosimeters offer distinct advantages in terms of their small size, their sensitivity to photon energies below 10 keV, and their adaptability to an electrical readout system. (auth)

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From symposium on noble gases; Las Vegas, Nevada, USA (24 Sep 1973). The performance of the fixed-bed activated-charcoal trap at the Nuclear Furnace Reactor in removing radioactive krypton and xenon isotopes from the hydrogen propellant is discussed. (auth)

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From joint meeting of the American Nuclear Society and the Atomic Industrial Forum and Nuclear Energy Exhibition; San Francisco, California, USA (11 Nov 1973). A theoretical investigation was undertaken to determine the effect of acceptable cladding vent sizes on the internal oxygen pressure in a PuO/ sub 2/ fuel sphere of a heat source capsule which consists of the fuel sphere clad in lr metal. The results are to be used in the design of a radioisotope- fueled thermoelectric generator for space applications (SNAP). The vents must be large enough to minimize the oxygen pressure in the sphere, thereby minimizing the transport of Ir, and, at the same time, small enough to prevent the escape from the capsule of particulate Pu. The vent is idealized as a short tube of length l and radius a. The flow equations assume transitional viscous-molecular flow through such a shont tube. The results indicate that a vent with a l/a ratio of S significantly improves the oxygen exhaust rate in the fuel capsules as compared to smaller vent sizes and should solve the problems resulting from the transport of iridium. (LCL)

From 2nd AEC scientific computer information exchange meeting; New York, New York, USA (2 May 1974). Graphical output from a computer is easily interpreted. Perspective plots are presently the best way to communicate large amounts of information to man from the computer. A magnetic field was generated in the path of the accelerator beam and the shape of the magnetic field was plotted. The PICTURE program was also used to caiculate laser absorption on a material as a function of angle of incidence and depth of penetration. Cn crosssections as a function of photon frequency and temperature; chemical equilibrium of a chemical solution; generation of patterns; shape of fragments of material as they traveled away from the center of an explosion; nuclear spectra for several isotopes; detect errors in large computer programs; displaying functions of two variables; displaying underground formations; map of ocean floor; and shock-wave data are examples given. (MCW)

From symposium on the physical behavior of radioactive containment in the atmosphere; Vienna, Austria (12 Nov 1973). Analysis of the fate of airborne effluerts from a nuclear reactor at an off-shore site requires a better understanding of overwater atmospheric dispersion than currently exists. For this reason, a diffus1on study was undertaken off the south shore of Long Island, New York, about 100 km from New York City. This study is using tracer material (oil fog smoke) released from an anchored boat. Measurements of mean wind, turbulence, and temperature are made on portable towers on the beach, from an aircraft, and aboard the source boat. Plume geometry 1s documented by photography and from quantitative concentration measurements. Experiments under a variety of meteorolog1cal conditions indicate that over-water dispers1on is very sensitive to meteorological conditions. From measured is significantly less than over land, particularly when the onshore flow is due to the sea breeze. This is because of the low aerodynamic roughness of the water, and because low level stable conditions are established because the water is at lower temperature than the air. Crosswind standard deviations of the plume a factor two less than the prediction of Pasquill category F have been observed …

The BLIP serves as a beam stop snd utilizes the excess beam capacity of the 200-MeV proton injector linac for the Alternatmg Gradient Synchrotron. The primary objective of the BLIP program is the development of improved radiopharmaceuticals. The production methods for iron-52, xenon-127, and xenon- 123 are outlined, and research work on the production of other radioisotopes is summarized. (WHK)

From joint meeting of the American Nuclear Society and the Atomic Industrial Forum and Nuclear Enengy Exhibition; San Francisco, California, USA (11 Nov 1973). The plutonium-containing samples analyzed for nuclear safeguards purposes range from heterogeneous scrap materials to highly pure metal. The factors governing the selection of analytical methods are the quantities of plutonium represented by the sample and the representativeness of the sample. Product-type materials generally are characterized by high plutonium contents and homogeneity whereas scrap-type materials usually have low plutonium contents and are heterogeneous. Analytical methods that provide highly reliable measurements therefore are used for product materials and less reliable methods are acceptable for scrap materials. Analytical methodology used for plutonium assay for various nuclear fuel cycle materials with emphasis on Los Alamos Scientific Laboratory (LASL) practices is discussed. A major portion of this presentation is devoted to a system under development for scrap-type samples which involves a combination of high-temperature, pressurized, acid-dissolution attack; a gamma assay for low levels of plutonium in any resulting residue; and use of an automated spectrophotometer for measuring plutonium in the solubilized fraction. The isotopic analysis of plutonium is briefly discussed. Also, the status of physical standards for assay and isotopic measurement …

Two independent systems for determining wind speed and turbulence levels are being used in an on-shore diffusion study on Long Island near Brookhaven National Laboratory. Results obtained from the two instrument systems are compared to illustrate the differences in the measured values of the vector wind, mean wind speed, variance, turbulence level and energy spectra. Details of the physical characteristics and relative advantages of a commercial Vector Vane and a three-dimensional hot-film sensor are also presented. Measurements of the mean wind speed and the turbulence level compared well. The Vector Vane underestimated spectral densities for frequencies above 1 hertz. (auth)

From 2nd AEC scientific computer information exchange meeting; New York, New York, USA (2 May 1974). A typical hydrodynamic physics program may run up to 20 hours on a CDC 7600 computer and generate up to a billion numbers. The biggest problem facing the users of these programs is simply comprehending what has been calculated. Stacks of computer listings are typical outputs but serve as a poor communication medium. Static pictures are much better than listings but are limited to two dimensions. Through the use of movies, one adds a third dimension to the communication process. The evolution of computer generated movies at Los Alamos Scientific Laboratory and the techniques now in use are described. (auth)

From 11th modulator symposium; New York, New York, USA (18 Sep 1973). A design for a very reliable single-triode modulator for a 11/4 MW modulating-anode klystron is presented. The operating voltage is 86 kV and the variable pulse length ranges from 200 4mmsec to 1.2 msec. The basic modulator circuit, which uses a novel Zener diode bias circuit, and several of the individual components are described in detail. Over 140,000 high-voltage hours have been accumulated on these modulators. The principal failure mechanism is grid emission from the triode. These failures can be anticipated and repaired during a normal maintenance period. The triode is then reprocessed and reused. Tube life data and a summary of the failures modes are presented. (auth)