From abstract: "Isotopic assays have been made on the chromium in samples from fourteen different chrominiferous minerals from different geographic and meteoritic sources. The results of the assays indicate that it is not possible to unequivocally state that variations in isotopic compositions have been observed."

This technical report describes the toxicity observations on mice of varying borate-glucose molar ratios and relative potencies (p) (4) for the pentaborate and tetraborate drug. This report outlines the methods and results of this experiment and provides a discussion of the results.

The potassium-argon age of the Sikhote Alin iron meteorite has been determined. The value is 1.7 + 0.2 x 10⁹ years. Previous lead data suggest an age of 4.6 x 10⁹ years . The date of solidification may be the sum of these two ages.

The relation between trace kinetic parameters of cell populations and the statistics used in studies on cell populations is discussed. It is pointed out that responses in cell populations are complex and subject to many perturbations. Some of these are discussed. It is concluded that a complete check list of sources of error is required for studies of great accuracy, and a calculus to help in combining heterogeneous data is needed for studies of systems of great complexity.

The performance of a Schultz-type texture goniometer is shown to be adversely affected by a number of experimental errors all of which result in defocusing of the diffracted beam. Those errors result from the tilting of the specimen, from lack of precision in positioning it and from its absorption coefficient. An experimental procedure is outlined which minimized these errors and results in optimum performance of the instrument.

This technical report discusses techniques that have been developed for "computing the angular thermal flux spectrum emerging from a lattice. These methods are applied to water lattices and it is found that the computed spectra are sensitive to the geometrical description of the lattice, but insensitive to the anisotropic scattering by water. Comparisons with measured spectra indicate that corrections for gradients and the finite size of the experimental lattice are important." -- from abstract (p. 3).

From abstract: "Using the high energy limit of the exact Coulomb wave function for the outgoing electron, the differential cross section, correct to three orders in aZ, is calculated for the K-shell photoeffect. An analytic expression, exact in aZ, is obtained for the differential cross section for the special case in which the electron emerges in the forward direction."

A study is being made of two-prong antiproton interactions in hydrogen at 3.25 Bev/c. About 2250 two-prong events were measured on automatic digitized machines and their reconstruction and analysis were performed with standard programs. Of the total number of events 1003 were classified as elastic interactions. About 500 inelastic events were examined using bubble density estimates in addition to criteria based on distribution values in the classification procedure. The inelastic events in which a secondary nucleon or antinucleon was unambiguously identified were used to obtain limits for annihilation and non-annihilation partial cross sections. The two-prong events were 57% of the total. Results for angular distributions and cross sections are presented in graphs and tables. (M.C.G.)

An apparatus for differential thermal analysis of active or toxic materials is described. The technique is superior to thermogravimetric analysis. Analysis of the dehydration of beryllium sulphate shows that the process takes place in three stages. Some applications are given for a modified apparatus for quantitative work.

From introduction: "We have previously described simple modifications of a 'Cenco' hydrophil balance which allowed automatic recording of monolayer compression characteristics. This note describes the torsion balance and trough designed and built in this Laboratory as a result of our experience with the previous instrument."

A set of simultaneous differential equations is established to describe the temperature distribution for coolant flow in three concentric channels separated by walls of finite thermal conductivity and surrounding a cylindrical heat source. The solution of this set of differential equations is dependent on the heat source function Q(z) which must be known or specified. An assumed function Q(z) constant is taken as being a representative case and the resultant solutions are applied to several geometric arrangements. The system of three channel flow reduces to two channel flow when there is zero heat flow across the outer intermediate wall. This condition may arise if the wall is a perfect insulator, or if the flow in the third channel is zero. For the former case the temperature in the third channel is constant over its length, and in the second the stationary coolant assumes the temperature of the coolant in the middle channel. From the set of differential equations established for two channel flow, treatment similar to that used for three channel flow is adopted and the resultant solutions are applied to several geometric arrangements. Brief mention is made of single channel flow. By assuming that the heat sources is zero …

Summary. Cattle in Reno, Nevada, exhibit a constant very low concentration of I 131 in their thyroid glands in the absence of known releases of I 131 to the atmosphere. This concentration is about 1 picocurie per gram of fresh thyroid tissue. ; This I 131 appears to originate below the tropopause

Empirical methods are given for calculating reactivity changes in HIFAR with changes in fuel loading, poison concentration, and temperature variations. The procedures are derived from the analysis of typical operating programs, reinforced by analogue computer analysis of variation of the important fission product poisons Xenon 135 and Samarium 149.

The propagation of clonal varieties of some orchids is at times exasperatingly slow and occasionally an almost futile effort. Clonal multiplication is generally confined to dividing mature plants and to starting plants from pseudobulbs. There is, of course, the specialized technique for obtaining Phalaenopsis plantlets from the aseptic culture of inflorescence nodes, but this is basically the same thing as propagating plants from pseudobulbs. In certain cases it is highly desirable to rapidly multiply certain clones of orchids. Awarded varieties could thereby be dispersed with great rapidity where now it may take decades for some clones to became fairly common. Commercial flower production would be very much enhanced if certain desirable clones could be multiplied ad infinitum within a short time. Orchid flower production could then be placed more on a par with many of the other cut flowers and the clonal peculiarities of some of the current hybrids could be pampered instead of ignored. This paper describes a tissue culture method for the rapid propagation of Cymbidium clones

Extracorporeal irradiation of the blood was prolonged for as long as 38 hours. Red cells are injured by the radiation dose. Hemolysis may commence after 28 hours presumably due to the irradiation. Utilizing extracorporeal irradiation of the blood combined with thoracic duct cannulation, one can measure minima for net lymphocyte input into the peripheral blood from all sources other than the thoracic duct. An unusual and new pathologic picture of lymph nodes and spleen has been produced by extracorporeal irradiation of the blood. Heparin mobilization of a large pool of lymphocytes into the blood directly and via the thoracic duct must be considered in all studies utilizing heparin as an anticoagulant. The lymphocytosis produced by this mobilization is suppressed by concurrent extracorporeal irradiation. The apparent quantitative destruction of the lymphocytes by extracorporeal irradiation of the blood may permit studies of lymphocytic function hitherto not possible by direct experimentation

This paper considers the duty of the physician to provide comfort and care for cancer patients and suggests four tenants for physicians to follow to assist with this: 1) No matter what the patient's condition, the physician shall be always available, even if only to listen and talk. 2) In spite of the ravages of cancer, the patient lives with it. 3.) The patient is an adult under guarantees of the constitution. and 4) The physician will always communicate with the patient. The paper ends with a discussion of the objectives for management of cancer patients.

An automatic delayed reactivity feedback based on exit coolant temperature is shown to lead to an increase in linear stability against xenon oscillations when the delay time is within a few percent of the free period of oscillation. Numerical calculations show that the stabilizing effect extends into the nonlinear range as well. It is shown that dead band control is spatially destabilizing if the dead band width is too small. A width of ± 5% is, however, found sufficient to avoid this form of instability for large changes in power demand.

The sexual reproductive ability of a forest exposed to low level ionizing radiation is dependent on the sensitivity of primordial differentiation, meiotic processes leading to the formation of gametes, fusion of the gametes, and subsequent growth of the sporophytic generations. In this report it was shown that the initiation of reproductive primordia in Pinus rigida, Quercus ilicifolia, Quercus alba and Quercus coccinea is not unusually sensitive to irradiation. Trees which had been severely damaged by chronic low level ionizing radiation (4 to 12 r/20 hr day) were able to differentiate floral structures and produce viable seed. However, flower phenology was retarded, and pronounced morphological aberrations were present. It is suggested that this delay may be the result of a reduction of endogenous growth substances.

This technical report examines the recent findings, of Brookhaven National Laboratory and others, on the relation between diabetic ketosis and intermediary metabolism. This report compares new findings with past knowledge and considers new trends in research, theory, and the management of diabetic ketosis.

A transistorized phase meter built around a NOR circuit is described. The upper frequency limit is on the order of 4.5 Mc. The use of a flip-flop as a frequency divider extends the usable phase range from 0° to 360°. The resulting ambiguity is corrected by a reset circuit. The deviation from linearity is less than ± 1°. The phase modulation frequency bandwidth is 20 kc.

Machine calculations have been made of the dynamics of a set of atoms simulating a crystal undergoing radiation damage. Work on copper is reviewed briefly, and its extension to a simple model of ordered Cu₃Au is described. Investigations of lattice agitation in the wake of a damage event and the extent to which a thermal spike model has validity are discussed. Information on point defects and clusters of point defects in copper is another by-product of the calculations. Recent extensions of the calculations to a model of α-iron are provisionally reported. Although a satisfactory interatomic potential has not yet been not found, it appears that the easy direction for production of a displacement is (100) and that the interstitial in this lattice has a split configuration with (110) orientation.

A brief overview of a study on the effect of 5-fluoroucil (FU) on chloroplast formation in Euglena,

Black mice have been exposed to a deuteron macrobeam to assess the greying response from heavy primary cosmic ray particles. It is found that greying depends solely on a direct hit by the radiation on the bulb of the follicle. It is concluded that the heavy primary cosmic ray particles would be expected to cause greying of the hair. This result strengthens earlier conclusions indicating that these particles will cause very minor somatic damage in mammals.

The second partial differentials of the production cost equation are derived in a generalized and non-dimensional form in order to determine the effect on production cost of electricity from a gas-cooled nuclear power plant of departure from optimum operating conditions. Fuel element surface temperatures up to 650 degrees C, production costs up to 1d. (A)/kwh and reactor coolant temperature rises up to half the maximum surface temperature are included. The most significant parameter is the ratio of the reactor coolant temperature rise to maximum surface temperature which causes a maximum increase in production cost of 0.5 per cent, for a +- 5.0 percent change in its value.