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From the empirical facts of the structure functions fP(x) and f=(x) we try to obtain the quark number density functions ~(x), d(x), s(x) and ~(x) in analytic form. These are evaluated accurately from the probabil i ty constraints together with neutrino data. Except for the assumption of the analytic forms for the parton distribution functions, our results predicted are entirely model independent. The present investigation is a cont inuat ion of the earlier work of CL~YMANS and SEtIGAL (1). Although large parts of this paper look similar in content and in language to that of the above authors, the assumptions and formulations of our equations are based entirely on empirical observations. Since our kinematics and definitions are similar to those of CL~YMA~S and SE~GAL, we simply refer to their work for common equations. From the equations of ref. (1) together with neutrino data (2) we get

Proteins of gibbon ape lymphosarcoma virus (GaLV) and woolly monkey sarcoma virus, type 1, together with its associated virus ( SSV-1 SSAV-1 ) were analyzed by guanidine-agarose chromatography and the separation patterns were compared with those of mouse and feline type C viruses. GaLV contained five major proteins, including two glycoproteins, whereas lower mammalian viruses contained six major proteins, including two glycoproteins. The molecular weights of the five GaLV proteins closely resembled the molecular weights of the five equivalent lower mammalian viral proteins. SSV-1 SSAV-1 showed a separation pattern similar to GaLV except it contained a low but detectable amount of an additional glycoprotein. Both GaLV and SSV-1 SSAV-1 were deficient in a protein of molecular weight about 15,000 daltons which is found in all known type C viruses of avian, reptilian and lower mammalian species.

The thermal diffusion factors alpha T of the gas mixtures CH4-N2 and CH4-CO2 have been measured as functions of temperature and composition by using the two-bulb method. The data have been analysed to assess the effects of inelastic collisions on thermal diffusion. The results show that for the system CH4-CO2, the thermal diffusion factor is significantly influenced by inelastic collisions. For CH4-N2 system no definite conclusion can be drawn regarding the influence of such effects.

Photoreduction of methylene blue in the presence of various organic and biomolecules has been studied spectrophotometrically and potentiometrically. During the photoreduction, the emf of the system measured against calomel electrode increases and attains a plateau long before the complete reduction of the dye. This indicates that the emf developed in this system is not that of the dye/leucodye in which case the plateau of the emf value would be expected at the complete reduction of the dye. The emf has been interpreted to be mainly that of dye/dye free radical, although dye/leucodye and dye free radical/leucodye may contribute to the emf value of the system. The free radical may be formed in the system immediately after exposure to light or even in the dark at high pH. Photoreduction of methylene blue in the presence of EDTA is completely inhibited by excess magnesium ions. By using various compounds to act as electron donors in the photoreduction, it has been found that compounds having the general formula R1R2·N·CH2COOH can cause the reduction of methylene blue where R1 and R2 may be−CH2COOH or alkyl or aryl substitution. Photoreduction becomes faster with more than one−CH2COOH group in the compounds. Glycine or N-methyl glycine fails to act as a catalyst, N-phenyl glycine or N:N-diethyl glycine catalyses the photoreduction. N-phenyl- or N-ethyl amino diacetic acid causes faster photoreduction of methylene blue. Analgin causes photoreduction even in dark. The dye capri blue is not photoreduced by EDTA though there is an increase in the emf of the system on its exposure to light; but the presence of methylene blue in the system catalyses its photoreduction.

Iproniazid, a specific monoamine oxidase inhibitor which is known to exert its primary influence by interfering in the metabolism of catecholamines, showed its antifertility efficacy by causing luteolysis in rats. A concomitant regimen of iproniazid and aspirin, a very potent inhibitor of prostaglandin biosynthesis and release, consistently prevented the iproniazid-induced luteolysis and embryonic resorption in the test animals. It has been proposed that iproniazid-induced luteolysis in rats is probably mediated through an increased production of endogenous prostaglandins as a result of an abnormally higher concentration of catecholamines both at central and peripheral levels.

A multishell Hartree-Fock calculation for18O nucleus has been done with the Tabakin and Hamada-Johnston interactions followed by pairing correlations and angular momentum projection. TheB(E2) transition rates have been reproduced with an effective charge of 1.5e for protons and 0.5e for neutrons, but the fit to energy levels is poor. An approximate alternative formalism has then been developed which casts the eighteen-particle problem into a two-valence nucleon problem. The two valence nucleons interact through the RPA-type oscillation modes of the core. Calculations with the two interactions mentioned above have reproduced roughly the uncorrelated projected Hartree-Fock spectrum. Lastly, the excited band spectra of18O have been examined in the TDA approach followed by band mixing.

A method of bicharacteristics (3) is used to derive a numerical method for solving multidimensional nonlinear Lundquist equations of magnetohydrodynamics. Actual numerical computations are carried out to solve two specific problems of mag- netohydrodynamics—the magnetohydrodynamic initial-pressure problem and a problem of cylindrical waves in a transverse magnetic field due to a thin current-carrying wire perpendicular to the plane of the fluid. 1. Introduction. In this paper, we derive a method for the numerical solution of Lundquist equations which describe the flow of an electrically conducting fluid in the presence of an electromagnetic field. The method is derived from a method of bicharacteristics. In deriving the method, we have used the most general three- dimensional situation without linearization. The method is then used to solve two specific problems in magnetohydrodynamics—the magnetohydrodynamic initial- pressure problem and the problem of cylindrical waves in a transverse magnetic field due to a thin current-carrying wire perpendicular to the plane of the fluid. The exact solution of the initial-pressure problem in the presence of a uniform magnetic field was obtained by Friedlander (1) from the linearized version of the Lundquist equations. We compute solutions for both nonlinear and linearized equations.

The m e a s u r e m e n t of s ing le -had ron d i s t r i b u t i o n s in deep ine las t ic (i) r eac t ions can serve as a usefu l too l for t h e u n d e r s t a n d i n g of t he s t r u c t u r e of t h e nucleon. The quarkp a r t o n mode l as desc r ibed b y FEYNMAN a n d BEn~AN et al. (2) ha s more p r e d i c t i v e power t h a n t h e l i g h t c o n e a p p r o a c h (a) for p r o d u c t i o n of single h a d r o n s in t he c u r r e n t f ragm e n t a t i o n region. I n th i s p a p e r t h e t w o c o m p o n e n t (4) d u a l i t y idea is be ing app l ied w i t h i n t h e p a r t o n mode l to descr ibe t h e deep ine las t ic r eac t ions . The q u a r k d i s t r ibu t i on w i t h i n t h e nuc l eon is d i v i ded i n t o two c o m p o n e n t s such as t h r e e va lence qua rks p lus a core of q u a r k a n t i q u a r k pa i rs . T he sea of core q u a r k s is a s sumed to be composed of equa l n u m b e r s of each type . Th i s co r responds to t h e p o m c r o n b a c k g r o u n d p a r t of t h e a m p l i t u d e . The t h r e e v a l e n c e q u a r k c o m p o n e n t co r re sponds to t h e Regge r e s o n a n t p a r t of t h e a m p l i t u d e . The n u m b e r of t he p a r t o n d i s t r i b u t i o n f u n c t i o n s can be r e d u c e d to one on ly i f one assumes t h e k i n d e r g a r t e n p a r t o n mode ls of BJOI~KEN (5). I sosp in a n d cha rge c o n j u g a t i o n i n v a r i a n c e reduces t h e n u m b e r of p a r t o n f r a g m e n t a t i o n f u n c t i o n s to t h ree . W e also define V(z) (s) as a f a v o u r e d t o u n f a v o u r e d f r agment a t i o n r a t i o such t h a t

The results of experimental and analytical studies on the characteristics of concrete reinforced with uniformly distributed short wire pieces are presented. The experimental program includes tests on workability, modulus of rupture strength, and compressive strength of 75 batches of concrete; the major variables are water-cement ratio, percentage of steel, and gage and length of wire pieces. Despite the slight loss of workability, preparation of good wire reinforced concrete is quite feasible. Effective wire spacing has been formulated taking into consideration the bond deficiency and probable orientation of the wire pieces both within the interior concrete and near the exterior faces of the specimen. Based on experimental results, a correlation has been obtained between effective wire spacing and tensile strength ratio.

3-Hydroxyflavone, morin and quercetin are suitable for the fluorescent detection of hafnium and zirconium under proper acidity and reagent concentration conditions. 3-Hydroxyflavone is the most sensitive reagent for both metals. Substantially acid solutions are preferred for the reactions of hafnium and zirconium to increase selectivity despite decreasing reaction sensitivity. The hydroxyflavone hafnium chelates are more stable to acid than the zirconium chelates especially with morin and quercetin. The very low background fluorescence of quercetin permits the detection of hafnium in strong perchloric acid where the fluorescence of the other two reagents hinders detection.

The Moller potential has been used to describe the electron-nucleon interaction and a formula has been worked out in the Born approximation for the differential cross sections of elastic and inelastic scattering of high-energy electrons by 2p-shell nuclei on the intermediate-coupling model with neglect of configuration mixing. Preliminary calculations have been made for Be 9 and C 12 to test some of the qualitative features of the formula deduced, especially the θ dependence of the σ(θ) vs θ curve for inelastic scattering with change of total angular momentum J.

The mechanical response of a non-uniform piezoelectric transducer when there is a body force acting on it has been evaluated using the methods of transform calculus.

Samples of bracken were taken at regular intervals between June and October from a hill grazing where losses of cattle from ‘bracken poisoning’ had occurred in previous years. These were separated into leaf and stem for analysis. Dry, mature bracken cut in October was examined for digestibility and nutritive value, and in the following season the digestibility of fresh, green bracken was determined for both cattle and sheep.Chemical composition. Analyses of the fresh bracken fed in the digestibility trials were in line with those of the samples collected in the previous year. Crudeprotein content was high in June and July, but fell markedly in August and September, whilst the crude fibre varied in the opposite direction, increasing markedly in August. An increase in the tannin content was observed in September but this was not comparable with the increases reported by Shearer. An attempt to elucidate the significance of tannin in the in vitro digestion of bracken-leaf protein was unsuccessful. The potassium content was found to be rather lower than in good pasture grass, confirming the findings of Ferguson & Armitage. The potassium was highly soluble in water but the soluble part was not entirely in the form of chloride.

UDPglucose 4-epimerase (EC 5.1.3.2) from both goat liver and the yeast Saccharomyces fragilis was strongly inhibited by uridine nucleotides. The yeast enzyme, unlike the liver one, showed substrate inhibition. UMP, in combination with various sugars, slowly but irreversibly inactivated the yeast enzyme. NADH became a strong inhibitor for the yeast enzyme once NAD + had been removed from the enzyme surface.

A modified Tamm-Dancoff approximation, developed in a previous paper, has been applied to even Ni and Sn isotopes. Detailed spectra, E2 transition strengths connecting various levels, and the quadrupole moment of the first excited 2 + level have been calculated and the trends of the results compared with experimental values. The method appears to be fairly satisfactory. It points to the necessity of more reliable information on the effective interaction, active single-particle orbitals, and single-particle radial functions in order that a dependable quantitative fit to the data can be achieved.

The viscosities of chloroform, acetone, methyl and ethyl alcohols have been measured over the temperature range 30-200°C by using an oscillating-disk viscometer. The data have been used to obtain information concerning the intermolecular potentials of these polar organic vapours.

The neutron-proton charge-exchange polarization has provided new information to test various theoretical models and exchange degeneracy of ρ and A2 trajectories. The small polarization which is consistently negative and independent of energy at most points is changing our belief that particles like ρ and A2 are exchange degenerate. We are considering here a theoretical model which is capable of reproducing the desired np-pn polarization that has been found experimentally. This model for which the polarization has given reasonable qualitative and quantitative agreement with experimental data is consistent when we study simultaneously the polarizations and differential cross-sections for the processes np → pn and pp- → nn-.

Expressions are derived in the modified Tamm-Dancoff (TD) approximation which take into account the mixing of zero-, two-, and four-quasiparticle states for the description of the collective vibrational states of spherical nuclei. The proposed method is free from two very important defects inherent in the higher random-phase approximation (HRPA), namely, nonorthonormality and redunancy of the four-quasiparticle basic states. The relative merits of the present method over the existing one (HRPA) are discussed.

The modified Tamm-Dancoff approximation has been used to study the states of odd-mass Ni isotopes as the superposition of one- and three-quasiparticle states. The three-quasiparticle basic states are classified according to the well-known seniority scheme and are expressed in an equivalent second-quantized form. These three-quasiparticle states form an orthonormal and nonredundant set. The effect of the spurious 0 + two-quasiparticle state has also been removed from these basis wave functions. Several different kinds of two-body residual interaction have been used in the calculation. Fairly decent agreement is obtained in the energy spectra between our results and the exact shell-model results, using the effective interaction of Cohen et al. Various approximate methods, such as the perturbation theory and a phonon approximation, are discussed in the context of the present method. The effect of the ground-state correlation is also studied. The admixture of the three-quasiparticle states in the lowest few levels causes very little change in the magnetic moment, and the M1 transition rates calculated on the basis of a single-quasiparticle structure of these states. The E2 transition rate is fairly sensitive to the admixture and the type of interaction used.

Viscosity of the binary polar‐gas mixtures ammonia–diethyl ether and hydrogen sulfide–diethyl ether has been measured as a function of composition and temperature by a precision oscillating‐disk method. The experimental results have been interpreted in terms of the Chapman–Enskog theory by using the 12–6–3 potential with a set of combination rules for polar–polar interaction. The viscosity data have been used to obtain the interdiffusion coefficients for these systems.

Phenylacetylhydroxamic acid is used to separate titanium and zirconium from niobium in an oxalate medium at pH 6.5--7.5 in presence of ammonium chloride at room temperature. The method is accurate when the ratio of (TiO/sub 2/ + ZrO/ sub 2/): Nb/sub 2/O/sub 5/ is 10: 1 to 1: 1; when the niobium concentration is higher, reprecipitation is necessary. Tantalum, citrate, tartrate, lactic acid, EDTA, and a large excess of oxalate interfere. (auth)

The EPR and polarized optical spectra of copper calcium acetate hexahydrate and ${\mathrm{Cu}}^{2+}$ doped in isomorphous cadmium calcium acetate hexahydrate have been investigated in the range of temperature 300-77 \ifmmode^\circ\else\textdegree\fi{}K. $g$ values in both concentrated and doped crystals are found to be the same, indicating the identical ligand fields. The spin-Hamiltonian parameters remain un-changed throughout the temperature range. The parameters are ${g}_{\ensuremath{\parallel}}=2.360\ifmmode\pm\else\textpm\fi{}0.005$, ${g}_{\ensuremath{\perp}}=2.060\ifmmode\pm\else\textpm\fi{}0.005$, $|{A}_{\ensuremath{\parallel}}|=0.0119\ifmmode\pm\else\textpm\fi{}0.0002$ ${\mathrm{cm}}^{\ensuremath{-}1}$, $|{A}_{\ensuremath{\perp}}|=0.0013\ifmmode\pm\else\textpm\fi{}0.0002$ ${\mathrm{cm}}^{\ensuremath{-}1}$. Detailed study of the line-width has established the important contributions of the exchange, hyperfine, and crystal fields. The observed optical bands at 12 800 and 14 000 ${\mathrm{cm}}^{\ensuremath{-}1}$ exhibit polarization and have intensities characteristic of ligand field bands. With the knowledge of relative magnitudes of $g ({g}_{\ensuremath{\parallel}}g{g}_{\ensuremath{\perp}})$, assignments of the bands have been made, consistent with the ${D}_{2d}$ symmetry of the ligand field. The analysis has revealed that the $3{d}^{9}\ensuremath{-}3{d}^{8}4p$ configuration interaction is rather small (at most 2%) in these noncentrosymmetric complexes, and the covalent metal-ligand interaction is more pronounced in the ground state than in the excited states.

The nuclear matrix elements of 1p-nuclci for intermediate coupling, which have been worked out in a previous paper, are used here in the case of C/ sup 12/ to calculate the elastic form factor and the inelastic form factor corresponding to the excitation of the nucleus to its 4.43-Mev level. For the 7.65-Mev level only the monopole transition matrix element has been calculated. The difficulty that has been faced in making a tentative 21 assignment to the 9.61-Mev level has been pointed out by discussing the observed magnitude of inelastic 4.43-Mev scattering and position of the 15.09-Mev (J = 1, T = 1) level. (auth)

This paper is concerned with deriving methods for solving numerically a firstorder quasilinear hyperbolic system. The basic principle of the method is to integrate along one of the bicharacteristics of the system to obtain an equivalent integral system. The numerical methods are then obtained by making suitable approximations to this integral system. Stability and convergence properties are analyzed in some detail. The methods are relatively easy to implement and have been successfully applied to problems in one, two and three space dimensions in such areas as magnetohydrodynamics and dynamic elasticity.

The recent data of Meyer-Berkhout on the elastic scattering of 420-Mev electrons by ${\mathrm{N}}^{14}$ have been analyzed in the first Born approximation. A detailed treatment is given of the effect of the quadrupole charge distribution of the nucleus in causing a filling-up of the diffraction minimum. The intermediate coupling ground-state wave function of Visscher and Ferrell with an admixture of the spheroidal type of collective wave function, suggested by Fallieros and Ferrell, has been used in calculating the quadrupole form factor. Instead of using the Born approximation monopole form factor, the exact monopole scattering curve computed by Ravenhall from phase-shift analysis has been made use of. The spin-flip type magnetic scattering has also been calculated and found to be extremely small. The experimental data show the importance of the quadrupole charge scattering in the neighborhood of the diffraction minimum of the monopole scattering. The quadrupole scattering for the intermediate coupling is, however, completely inadequate to explain the observed data. This gives strong evidence for a collective enhancement of the ${\mathrm{N}}^{14}$ quadrupole moment through core deformation. The model of Fallieros and Ferrell, which predicts a total quadrupole moment of 3.07\ifmmode\times\else\texttimes\fi{}${10}^{\ensuremath{-}26}$ ${\mathrm{cm}}^{2}$ (collective enhancement=2.01\ifmmode\times\else\texttimes\fi{}${10}^{\ensuremath{-}26}$ ${\mathrm{cm}}^{2}$), is found to give a fairly good fit with the data.

Summary. The study examined the value patterns of engineering, law, medical and teacher-training students in Indian colleges. Fifty students in each group were administered the Allport-Vernon-Lindzey Study of Values. When the t-test was applied to the strength of six value variables within groups, a clear hierarchy of values emerged in each group. In the case of engineering students, economic value was the highest value variable while religious value was the lowest. In the case of law students, political value emerged as the highest value variable followed by economic value. In the case of medical students, theoretical value emerged as the highest value variable followed by social value, while aesthetic value emerged as the lowest value variable. In the case of teacher-training students, political value was the first followed by theoretical value.

A new method has been described for the gravimetric estimation, from a tartrate solution, of niobium and tantalum by quinaldinohydroxamic acid. In theph range of 5.0 to ammoniacal, both the elements are quantitatively precipitated from an ice-cold solution in presence of ammonium chloride and can be separated from quite a large number of ions using EDTA as a masking agent.

A study has been made of the separation of alkali and alkaline earth metals. With mixtures of solvents, such as ethyl cellosolve, water and hydrochloric acid and acetone, water and hydrochloric acid in the ratio of 70∶20∶10 and at different temperatures, a complete separation of alkaline earth metals was effected. Of the alkali metals only lithium, sodium and potassium could be separated from each other but rubidium and caesium always accompanied potassium.

The viscosity of the binary gas mixtures H2–N2 and H2–NH3 has been measured in the temperature range 33°—200°C and at pressure below 10 cm Hg, by using a precise oscillating‐disk method. The data have been utilized to calculate interdiffusion coefficients for these systems.

Light-scattering behaviour of polyvinyl pyridine and silver nitrate mixture in alcohol showed that the system behaves like a poly-electrolyte. This has been explained by the structure of the pyridine-silver complex that has been known for quite some time.

AN inhibitor of the RNA-dependent DNA polymerases1,2 of mammalian C-type viruses was found in sera from rats bearing transplantable tumours, induced by murine C-type RNA tumour viruses3,4. Partially purified polymerases of murine leukaemia virus3 and feline leukaemia virus (FeLV)4 were shown to be antigenic in rabbits and a rat, respectively. We have detected an inhibitor of the DNA-dependent DNA polymerase5,6 of feline and murine C-type viruses in the sera of cats inoculated in utero and/or postnatally with the Gardner-Arnstein strain of feline sarcoma virus (FSV)7 and in the sera of cats bearing spontaneous sarcomas, lymphomas or carcinomas.

Viscosity of acetylene, carbon dioxide, carbon disulfide, and benzene has been measured in the gaseous state (at pressures below 10 cm Hg) by a precision all‐metal oscillating‐disk viscometer. All of these substances have comparatively large quadrupole moments. Attempts have been made to derive information on quadrupole‐quadrupole interactions from these data.