Showing papers on "Deposition (chemistry) published in 1971"
Patent•
11 Mar 1971TL;DR: DETERGENT COMPOSITIONS CONTAINing WATER-INSLUBLE PARTICULATE SUBSTANCES, SUCH AS ANTIMICROBIAL AGENTS, and CERTAIN CATIONIC POLYMERS, serve to enhance the dePOSITION and RETention of SUCH PARTICulate SUBSTances on SURFACES WASHED with the DETERGENT compositions as mentioned in this paper.
Abstract: DETERGENT COMPOSITIONS CONTAINING WATER-INSLUBLE PARTICULATE SUBSTANCES, SUCH AS ANTIMICROBIAL AGENTS, AND CERTAIN CATIONIC POLYMERS WHICH SERVES TO ENHANCE THE DEPOSITION AND RETENTION OF SUCH PARTICULATE SUBSTANCES ON SURFACES WASHED WITH THE DETERGENT COMPOSITION.
430 citations
TL;DR: A review of molecular-beam epitaxy of GaAs and the observation of surface structures with high-energy electron diffraction in an ultrahigh-vacuum system is described in this article.
Abstract: A review of molecular-beam epitaxy of GaAs and the observation of surface structures with high-energy electron diffraction in an ultrahigh-vacuum system is described. The utilization of these surface structures as growth conditions to produce n- and p-type layers when doped with Sn, Ge, and Mg, and the electrical and optical evaluations of the layers thus grown is also discussed. The molecular-beam epitaxy method may be used to fabricate extremely thin multilayer structures and may play an increasing role in semiconductor technology.
257 citations
TL;DR: In this article, the authors studied the metal concentrations of Hypnum cupressiforme, Hylocomium splendens and Sphagnum magellanicum from different parts of Scandinavia.
Abstract: Metal concentrations of Hypnum cupressiforme, Hylocomium splendens and Sphagnum magellanicum from different parts of Scandinavia have been studied. The mean concentrations of Cd, Co, Cr, Cu, Ni, Pb and Zn in Hypnum cupressiforme from southern Sweden are larger in the south-west than in the north-east. The difference is highly significant for Pb, Cu and No. The concentration of Pb and Cd in Hylocomium splendens is more than ten times larger in south-western Sweden than in northern Norway and also for other heavy metals (except Mn) the differences are considerable. No differences between northern and southern scandinavia in the concentrations of Ca, K and Mg have been measured. Heavy metal concentrations of Sphagnum magellanicum in ombrotrophic bogland sites coincides well with the concentrations of Hylocomium splendens from woodland sites of the same area. The deposition of heavy metals/hectare/year has been calculated. The only probable explanation of the measured gradients is that the deposition of heavy metals, originating from human activity is much greater over southern scandinavia, particularly south-western Sweden, than over northern Scandinavia. The regional basic concentrations reported in this article reflect the fall-out from an atmospheric pool to which both neighbouring and remote sources contribute.
173 citations
TL;DR: In this article, a molecular beam epitaxy has been used for the attainment of single-crystal multiple-layer structures with alternating types of conductivities (p/n) or band-gap energies (GaAs/AlxGa1−xAs).
Abstract: Molecular‐beam epitaxy has been used successfully for the attainment of single‐crystal multiple‐layer structures with alternating types of conductivities (p/n) or band‐gap energies (GaAs/AlxGa1−xAs). Deposition by the molecular‐beam method offers the possibility of growing periodic‐structure layers with constant chemical composition profiles and controlled uniform thicknesses.
127 citations
TL;DR: In this article, the partial current density-potential curves of the cathodic iron deposition were calculated by current efficiency measurements under steady-state and non-steady-state conditions at 25°C under hydrogen atmosphere.
Abstract: The cathodic iron deposition reaction from acid solutions was studied. The partial current density‐potential curves of the iron deposition were calculated by current efficiency measurements. The experiments were carried out under steady‐state and nonsteady‐state conditions at 25°C under hydrogen atmosphere. Under steady‐state conditions a rotating gold disk electrode was used in order to eliminate the rise of pH in the vicinity of the electrode surface. The results show two different reaction mechanisms depending on the at the electrode surface. At the kinetic data correspond to a noncatalyzed mechanism, while at a catalyzed mechanism takes place. The influence of the surface on the mechanism is due to the different electrochemical reaction orders related to the and the formation of hydrolysis products, which may be incorporated in the deposit. The calculated exchange current densities of the electrode show that the noncatalyzed mechanism is the normal one.
95 citations
TL;DR: Experiments have been made to measure the deposition of radioactive monodisperse polystyrene particles of size between 1 and 10 μm dia aspirated through the nose and mouth at known flow-rates, finding a much closer relationship with the pressure difference.
87 citations
79 citations
TL;DR: The angle of climb of ripples in this widespread structure depends theoretically on the net rate of deposition on the bed, the bed-load transport rate in the absence of net deposition, and a deposi...
Abstract: The angle of climb of ripples in this widespread structure depends theoretically on the net rate of deposition on the bed, the bed-load transport rate in the absence of net deposition, and a deposi...
75 citations
TL;DR: In this paper, the dispersion and deposition of timothy pollen emitted naturally from circular area sources 18-37 m in diameter and artificially from point sources were studied in 64 tests at Brookhaven National Laboratory.
48 citations
31 Oct 1971
48 citations
TL;DR: In this article, the worldwide deposition of long-lived fission products is considered against the history of nuclear explosions, and the present rate of deposition is much smaller than at the time of maximum fallout.
Abstract: The worldwide deposition of long-lived fission products is considered against the history of nuclear explosions. The present rate of deposition is much smaller than at the time of maximum fallout. The total amount deposited is consistent with the estimated amounts injected into the atmosphere.
TL;DR: In this paper, single crystals of ZnSe up to 2 cm in length have been grown by iodine chemical transport with a 3-5°C thermal gradient, and nonhomogeneous crystals were obtained by this method.
TL;DR: In this article, a study of the deposition of light hydrocarbons in the C 1 -C 4 range on various group VIII and IB metals was carried out, and the results reported in this paper concern some aspects of the kinetics of the hydrocarbon deposition on nickel.
Abstract: ALTHOUGH the properties of carbon formed from hydrocarbons on catalytic metal surfaces have received some attention, the kinetics of the deposition have not been studied in detail. We have carried out a study of the deposition from light hydrocarbons in the C1–C4 range, on various group VIII and IB metals. The results reported here concern some aspects of the kinetics of the deposition from unsaturated hydrocarbons on nickel.
Patent•
07 Apr 1971
TL;DR: For example, maleic/acrylic/alkenyl phosphonate terpolymers are useful as sequestrants and for inhibition of deposition of metal ion precipitates from aqueous solutions as discussed by the authors.
Abstract: Maleic/acrylic/alkenyl phosphonate terpolymers are useful as sequestrants and for inhibition of deposition of metal ion precipitates from aqueous solutions.
TL;DR: The feasibility of preparing silicon-aluminum alloys by the electrolysis of silica dissolved in molten cryolite-alumina mixtures has been studied in this paper.
TL;DR: In this paper, the left-lateral fault and associated tension fractures in Sabaaa formation (Precambrian) have been investigated by using hydrothermal solutions in and adjacent to the right lateral fault.
Abstract: Deposition by hydrothermal solutions in and adjacent to right-lateral fault and associated tension fractures in Sabaaa formation (Precambrian)
01 Jan 1971
TL;DR: In this article, a record of sedimenta tion from pro-glacia l sa ndur d eposits th rough p ro-glacia l lake deposits to fi na l deposition of till is used to interpre t cha nging environ menta l conditions, a nd d epositiona l processes.
Abstract: ABSTR ACT. A record of sedimenta tion from pro-glacia l sa ndur d eposits th rough p ro-glacia l lake deposits to fi na l deposition of till is used to interpre t cha nging environ menta l conditions, a nd d epositiona l processes. during the development of the \" Little Welsh Advance\" in the Shrewsbury a rea, Engla nd . The rela tionship between lacustrine sediments a nd till es tablishes till depos ition by flowage. H owever, the mos t important conclusions are d erived from the d eduction tha t lac ustrine sediments were incorpora ted into the basa l pa rt of the ice shee t a nd transported across previously d epos ited end mora ines. A discussion of this dedu ction, based on the findings of W eertman ( 196 1), es ta blishes that during the advancing phase the ice shee t was of the polar type. Final melting is thought to have occurred by both top-melt and under-melt as a result of cl ima tic a meliora tion.
01 Apr 1971
TL;DR: Lunar dust deposition and brushing effects on spectral solar reflectance of thermal control materials in vacuum have been studied in this article, where the authors show that brushing effects have a significant impact on the reflectance.
Abstract: Lunar dust deposition and brushing effects on spectral solar reflectance of thermal control materials in vacuum
Patent•
02 Jun 1971TL;DR: Polymeric phenazonium compounds, their method of preparation and their use in acid electrolytes for the deposition of bright, leveling, copper coatings on surfaces were discussed in this article.
Abstract: Polymeric phenazonium compounds, their method of preparation and their use in acid electrolytes for the deposition of bright, leveling, copper coatings on surfaces.
TL;DR: In this article, the uniformity of sheet resistance for a two-step arsenic diffusions was examined, where the sources used were AsCl 3 and tetraethyl orthosilicate.
Abstract: The variables affecting the uniformity of sheet resistance for a two step arsenic diffusions were examined. The sources used were AsCl 3 and tetraethyl orthosilicate. It was observed that the uniformity of sheet resistance (and hence surface concentration) is predominantly dependent on the variables during the deposition process. These are O 2 and N 2 carrier flow rates, source flow rates, and the temperature of deposition. The latter ranged from 350°C to 780°C. A comparison was made on the variables which affect arsenic and boron diffusions. In the latter case deposition temperatures were extended from a previous experiment [4] to as high as 1100°C.
Patent•
08 Nov 1971TL;DR: A chromatographic column packing comprising a polymeric film on a support, the formation of the polymer and its deposition on the support being made in situ is described in this paper.
Abstract: A chromatographic column packing comprising a polymeric film on a support, the formation of the polymer and its deposition on the support being made in situ.
TL;DR: In this article, Ag-, Cd-, Tl-, Pb- and Bi-films are condensed at constant deposition rates onto crystalline quartz, and film conductance is measured as a function of the mass condensed.
Abstract: Ag-, Cd-, Tl-, Pb- and Bi-films are condensed at constant deposition rates onto crystalline quartz. Film conductance is measured as a function of the mass condensed.
Patent•
19 Nov 1971TL;DR: In this article, a very high power densities in the VICINITY of a SPUTTERING TARGET and LIQUEFACTION THEREOF is used.
Abstract: APPARATUS GENERATING VERY HIGH POWER DENSITIES IN THE VICINITY OF A SPUTTERING TARGET AND LIQUEFACTION THEREOF IS UTILIZED TO PROVIDE VERY RAPID DEPOSITION OF HIGH TEMPERATURE ALLOYS WITH MINIMAL THERMAL FRACTIONATION. D R A W I N G