Abstract: An improved polycrystalline semiconducting ceramic composition comprises an alkaline earth metal titanate doped with a hexavalent metal oxide such as (MO.sub.3)(Bi.sub.2 O.sub.3).sub.x where M is tungsten or molybdenum, and x ranges from 0 to 7, which is liquid phase sintered with lead germanate to produce internal insulating boundaries. The composition is fine grained and provides thin-layer, multi-layer capacitors that exhibit high dielectric constant values, low dissipation factors, and low temperature and voltage coefficients of capacitance.

Abstract: Polymer bound multidentate complexes are prepared by reacting pendant benzyl chloride and benzyl iodide groups on a variety of polymer supports, including crosslinked polystyrene, with 3,3'-iminodiproprionitrile and reducing the nitrile groups by treatment with, for example, a boron hydride-tetrahydrofuran complex to form the amine. The amine is a precursor for other ligand systems; for example, the primary amine groups formed condense with an aldehyde or ketone to yield five coordinate Schiff base ligands. The polydentate amine ligand systems are useful for synthesis of chelating agents for sequestering metal ions from solution for purification or concentration purposes. Metal complexes of these ligands with manganese, iron, cobalt, nickel, copper, and zinc can be prepared which are useful as heterogeneous oxidation catalysts.

Abstract: Novel heterogeneous catalysts consist essentially of an anion exchange resin to which is bound ionically an anionic metal carbonyl species having the general formula M.sub.n (CO).sub.m (X).sub.p.sup.z- where M is a transition metal such as for example rhodium, cobalt, ruthenium, osmium, iridium, or iron; X is an anion, for example halide, hydride, or alkyl; n ranges from 1 to 12; m ranges from 1 to 34; p ranges from 0 to 2n+1; and z is an integer charge ranging from 1 to 5. The catalyst in which M is rhodium, m=2, p=2, n=1, and z=1 is highly effective for the carbonylation of alcohols to acids and esters. Many of these anionic species have utility in the hydroformylation of olefins.

Abstract: The disclosure is directed to a method for producing relatively uniform hollow spheres of a substance, the hollow spheres being formed with a gas therein as a result of the production process. The spheres, formed for example of hydrogen isotopes, are particularly useful as a fuel target for laser fusion applications. In accordance with the method of the invention, a jet of the substance of which the spheres are to be formed is provided in liquid form. Relatively uniform gas bubbles are injected into the liquid jet. In this manner, the bubbles break up or separate the liquid jet into relatively uniform hollow spheres of the substance, each with a bubble of the gas inside. The hollow spheres can be visualized as liquid droplets, each having a relatively uniform gas bubble therein.

Abstract: In accordance with the finding of undesired, non-uniform, heterojunction layers in heterojunction light emitters, it has been determined that completely uniform layers can be grown by growing individual super thin layers (i.e., .ltoreq.200 A) of uniform composition and stacking as many of these layers as desired into a uniform "thick" (.about.0.1.mu.) layer. This growth is accomplished by employing an LPE system wherein the substrate and melt are brought into contact for only the period of time during which the constituents of the melt deposit on the substrate in proper ratios. Steady-state diffusion-limited growth is avoided. The substrate is then removed from the melt, the melt allowed to re-equilibrate, and the process repeated as many times as desired.

Abstract: A method for quantitative propagation of hemotropic parasites, especially Babesia parasites, in vitro, Babesia-infected erythrocyte cultures are incubated in an environment of enhanced carbon dioxide tension wherein the culture medium overlay provides a barrier to oxygen transmission such that cellular hemoglobin is essentially maintained in its deoxy state. By varying environmental carbon dioxide tension, merozoite stages of the parasite are selectively reversibly induced to migration between residence in host cells or culture medium, rendering possible the isolation of infective antigenic merozoites in large quantities. Specific Babesia antigen is harvested in large quantity from the in vitro culture medium.

Abstract: Addition of from about 1.0 to about 15% by weight of a vanadium oxide or boric oxide promoter to a zirconia (ZrO.sub.2) powder promotes rapid densification at temperatures below about 1300.degree. C. For example, a density of greater than 92% of estimated theoretical density can be achieved by addition of 4% by weight of ZrV.sub.2 O.sub.7 to monoclinic ZrO.sub.2 and sintering at 1100.degree. C. for about 24 hours. Sintering at temperatures below about 1150.degree. C. avoids the destructive monoclinic/tetragonal phase transformation and provides for better control of microstructure and composition. A density of greater than 98% of estimated theoretical density can be achieved by addition of from about 2 to about 5% by weight of a boric oxide promoter to stabilized cubic ZrO.sub.2 and sintering at about 1200.degree. C. for about 4 hours.

Abstract: A water-soluble complex comprising polyvinylpyrrolidone and gossypol is an effective spermicide.

Abstract: Addition of from about 0.1 to about 6.0% by weight of V.sub.2 O.sub.5 to (PZT)lead zirconate-lead titanate powder promotes rapid densification at temperatures below 1000.degree. C. and eliminates the need for PbO atmosphere control. Densification to greater than 98% of theoretical density is achieved with firing times as short as 1-5 minutes. Dielectric properties depend upon the amount of V.sub.2 O.sub.5 added and upon the microstructure developed, but in general are equivalent to those reported for conventional PZT compositions.

Abstract: Polymer bound multidentate complexes are prepared by reacting pendant benzyl chloride and benzyl iodide groups on a variety of polymer supports, including crosslinked polystyrene, with 3,3'-iminodiproprionitrile and reducing the nitrile groups by treatment with, for example, a boron hydride-tetrahydrofuran complex to form the amine. The amine is a precursor for other ligand systems; for example, the primary amine groups formed condense with an aldehyde or ketone to yield five coordinate Schiff base ligands. The polydentate amine ligand systems are useful for synthesis of chelating agents for sequestering metal ions from solution for purification or concentration purposes. Metal complexes of these ligands with manganese, iron, cobalt, nickel, copper, and zinc can be prepared which are useful as heterogeneous oxidation catalysts.

Abstract: Advantageous operation can be achieved in a semiconductor heterostructure light emitting device by utilizing a single thin active layer which exhibits quantum size effects. It has been found that performance can be degraded by employing a single quantum layer that is thinner than a certain minimum thickness, this minimum thickness being about 100 angstroms, (the approximate carrier scattering path length). In one form of the invention, there is provided a semiconductor heterostructure device which includes first and second relatively wide bandgap semiconductor regions of opposite conductivity types. A single quantum well active layer is disposed between the first and second regions. The active layer is formed of a relatively narrow bandgap semiconductor having a thickness which is in the range of about 100 to 400 angstroms, and is preferably about 200 angstroms.

Abstract: Described is a heterostructure semiconductor device of sandwich type construction. The central layer exhibits high charge carrier mobility and a relatively narrow band gap characteristic. The outer sandwich layers exhibit low charge carrier mobilities and a larger band gap characteristic. Under quiescent conditions, the charge carriers from the outer sandwich layers reside in the central layer due to the "potential well" created by the band gap difference between the layers. The application of an appropriate electrical field to the central layer, aligned with the interface between the layers, causes a very rapid transfer of the electrons residing therein to the outer sandwich layers. This transfer results in the device exhibiting a negative resistance characteristic. Two and three terminal switching applications of the device are described as well as its application as a radiant energy detector.

Abstract: An improved solid state thermal engine utilizes as a drive member a braided belt fabricated from a memory alloy such as nickel-titanium and nickel-titanium ternary alloys, copper-zinc and copper-zinc ternary alloys, and the like. The braided belt is mounted on a set of pulleys to provide passage through a hot zone where the belt contracts and develops tension, and through a cold zone where it relaxes and stretches. Since more energy is delivered by contraction than is required for relaxation, positive work output results with an efficiency of between one-fifth and one-third of the Carnot cycle.

Abstract: Novel azaprostanoic acid analogs of the formula ##STR1## wherein: R is C.sub.1 to C.sub.8 alkyl or benzyl; and a has a value of from 0 to 6 inclusive, and their pharmaceutically acceptable salts and esters. Preferred 13-aza and 15-aza compounds are active in the inhibition of arachidonic acid-induced platelet aggregation and, more specifically, are direct and specific antagonists of the activity of prostaglandin H.sub.2 and thromboxane A.sub.2.

Abstract: An improved polycrystalline semiconducting ceramic composition comprises an alkaline earth metal titanate doped with a hexavalent metal oxide such as (MO.sub.3)(Bi.sub.2 O.sub.3).sub.x where M is tungsten or molybdenum, and x ranges from 0 to 7, which is liquid phase sintered with lead germanate to produce internal insulating boundaries. The composition is fine grained and provides thin-layer, multi-layer capacitors that exhibit high dielectric constant values, low dissipation factors, and low temperature and voltage coefficients of capacitance.

Abstract: The disclosure is directed to a method and apparatus for determining a newborn infant's capability to orally accept nourishment. In accordance with the method of the invention, a test nipple is inserted in the mouth of an infant. Further method steps comprise measuring the suction which the infant applies to the test nipple, and measuring the expression force which the infant applies to the test nipple. The infant's capability of orally accepting nourishment is then determined as a function of the measured suction and expression. In accordance with the apparatus of the invention, there is provided a test nipple, and first and second transducers adapted for coupling to the test nipple. The first transducer is operative to generate a suction-indicative electrical signal, and the second transducer is operative to generate an expression-indicative electrical signal. A timing circuit is provided for defining successive time intervals.

Abstract: Polymer bound multidentate complexes are prepared by reacting pendant benzyl chloride and benzyl iodide groups on a variety of polymer supports, including crosslinked polystyrene, with 3,3'-iminodiproprionitrile and reducing the nitrile groups by treatment with, for example, a boron hydride-tetrahydrofuran complex to form the amine. The amine is a precursor for other ligand systems; for example, the primary amine groups formed condense with an aldehyde or ketone to yield five coordinate Schiff base ligands. The polydentate amine ligand systems are useful for synthesis of chelating agents for sequestering metal ions from solution for purification or concentration purposes. Metal complexes of these ligands with manganese, iron, cobalt, nickel, copper, and zinc can be prepared which are useful as heterogeneous oxidation catalysts.

Abstract: Live Bovine Herpesvirus A.T.C.C. VR-2003 is employed in vaccination of horses to confer immunity to infection by Equid Herpesvirus Type 1.

Abstract: Process for identification and enumeration of B and T lymphocytes in an unseparated peripheral body sample comprises contacting the sample with two morphologically distinguishable bacteria, each of which is coated with an antibody specific to an antigen on one of the B or T cells. The presence of a B or a T cell is determined by rosette formation with the corresponding bacteria, as viewed under a microscope in a smear.

Abstract: Liquid phase sintering of a mixture comprising a major amount of barium titanate and a minor amount of a lead germanate composition at temperatures in the range of from about 750.degree. to about 1050.degree. C. provides a heterophasic ceramic body of high dielectric constant and strength, and low dissipation factor. Consequently, relatively inexpensive low melting point metals such as silver and copper can be utilized as electrodes in the fabrication of monolithic multi-layer capacitors.