Ferromagnetic and antiferromagnetic interactions in complex chlorides of chromium(II)
The compound CsCrCl3 is antiferromagnetic, whereas the compounds M2CrCl4(M = NH4,K,Rb,Cs) are ferromagnetic and their dihydrates are normally paramagnetic.
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Optical isomers of metaraminol. Synthesis and biological activity
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTOptical isomers of metaraminol. Synthesis and biological activityNoel F. Albertson, F. C. McKay, H. E. Lape, J. O. Hoppe, W. H. Selberis, and A. ArnoldCite this: J. Med. Chem. 1970, 13, 1, 132–134Publication Date (Print):January 1, 1970Publication History Published online1 M…
Electrochemical Impedance Response of Zn and Galvanized Steel Corroding under Marine Atmospheric Environments
Impedance response of zinc and galvanized steel samples exposed in wet-dry cyclic condition using 0.05 M NaCl solution has been analyzed in order to evaluate their corrosion behavior. The wet-dry cyclic test was performed by exposing sample to alternate conditions of 1 h immersion in 0.05 M NaCl solution and 7 h dryin…
Valence-bond isomer chemistry. Part I. The valence-bond isomers of hexakis(trifluoromethyl)- and hexakis(pentafluoroethyl)-benzenes
U.v.-irradiation of hexakis(trifluoromethyl)- and hexakis(pentafluoroethyl)-benzenes produces their valence-bond isomers. Hexakis(trifluoromethyl)benzene, in perfluoro-n-pentane solution, gives exclusively its benzvalene isomer with light of wavelength >270 nm.; with light of wavelength >200 nm., all three possible va…
EFFECT OF INTERPHASE CHARACTERISTIC AND PROPERTY ON AXIAL MODULUS OF CARBON NANOTUBE BASED COMPOSITES
In carbon nanotube (CNT) based composite, due to the small (micrometer) size of reinforcements a large amount of interphases is developed during the time of production. It is important to assess whether the interphase is responsible for the poor mechanical properties of CNT-reinforced composite. In this research, the…
Properties of PVC. II. Properties of PVC compounds with solvents
Abstract It was the aim of this paper to study the influence of the solvent residues in PVC compounds on physical and mechanical properties of samples prepared from them as well as the rheologic properties of their melts. Besides tetrahydrofuran other solvents are also partly retained in PVC even after processing at h…
STUDIES ON HETEROGENEITY IN FILLED RUBBER SYSTEMS
充てん剤系ゴムは単に充てん剤がゴムマトリックス中に分散した系ではなく, 複雑な高次構造を形成する. 本研究は充てん剤系ゴムの高次構造の各構造単位の形態, 分子運動性とマクロ的なゴムの力学的特性との間の関連性を, NR～ISAF, CaCO3, SiO2の各充てん剤系未加硫ゴムについて, NMR, 力学分散, DSCなどによるゴム分子鎖の運動面から検討した. その結果充てん剤の表面活性, その分散状態により充てん剤表面から離れた部分 (A相) のゴム分子鎖の運動は, それが活発に運動する状態では束縛を受けるが, この束縛された運動を見かけ上の非運動性のゴムの容積に変換することにより, E′, tanδの力学的数値をNMRより観測した…
Photochemistry of some non-conjugated unsaturated 1,2-diketones
A study of the photochemical reactions of some βγ-unsaturated and γδ-unsaturated 1,2-diketones is reported; it is concluded that the only efficient primary intramolecular processes involve the carbonyl group furthest removed from the alkyl chain, which may undergo cycloaddition via a five-membered transition state to…
Research and Development of Refractory Oxidation-Resistant Diborides. Part II, Volume IV: Mechanical Properties.
Abstract : Hot pressed diboride compositions of ZrB2 or HfB2 with additions of SiC and/or C were employed to produce materials with a range of compositions and microstructural variations of porosity and grain size for mechanical property evaluations which included ben strength and elastic modulus from room temperature…
Die spezifische Drehung des Sorbits und des Sorbit‐Molybdat‐Komplexes
The Specific Rotation of Sorbitol and of the Sorbitol Molybdate Complex. The specific rotation of the hexite at 365, 405, 436, 546 and 578 nm has been determined in solutions of different concentration with a commercial sorbitol preparation as well as with a self‐produced sorbitol. Contents of both preparations had be…
Axial Fatigue of Irradiated Stainless Steels Tested at Elevated Temperatures
Uniaxial fatigue properties from tests at 400, 500, 600, and 700 C on Type 304, 304L (Ti modified), and 316 stainless steel specimens irradiated at 450 C in sodium and 750 C in argon at fluences of 0.03 to 9.3×1021 n/cm2, E>0.1 MeV, are given and compared with control specimens. Material was tested in the annea…
Transition metal complexes of porphins, corrins and related compounds
Abstract
Enthalpy of formation of aluminium chloride
The standard enthalpy of formation of aluminium chloride has been measured by reacting aluminium with chlorine gas in the presence of an excess of liquid chlorine in a glass combustion vessel inside a calorimeter at 298 K. Complete reaction was achieved. The heat of evaporating part of the chlorine into the previously…
Phytofabrication of silver nanoparticles by using aquatic plant Hydrilla verticillata
Abstract. Sable N, Gaikwad S, Bonde S, Gade A, Rai M. 2012. Phytofabrication of silver nanoparticles by using aquatic plant Hydrilla verticillata. Nusantara Bioscience 4: 45-49. In the context of current drive to developed new green technology in nanomaterials, synthesis of nanoparticles is of considerable importance.…
The separation of proteins with heteropolyacids
Abstract The precipitation of proteins with heteropolyacids has been studied for the purpose of large scale primary purification. A precipitate will form if the pH of the reaction between purified ovalbumin, hemoglobin, trypsin, pepsin, bovine serum albumin, ovomucoid, gelatin or ribonuclease and tungstrophosphoric, t…
Inhibition of the second limit of the hydrogen + oxygen reaction by hydrogen bromide
The inhibition of the thermal reaction between hydrogen and oxygen by hydrogen bromide has been studied over a wide range of mixture composition and vessel diameter at 500°C using vessels coated with boric acid. Under these conditions, surface reactions are unimportant and the inhibition arises through the sequence of…
Studies on the Tanning with Glutaraldehyde as an Alternative to Traditional Chrome Tanning System for the Production of Chrome Free Leather
Chrome tanning is a versatile tanning system, but the pollution problems of chromium due to inadequacy of treatment systems and possible formation of Cr(VI), a carcinogen, have led to search for an ecofriendly and viable alternative tanning system. The present investigation focuses on the development of a novel, high…
The crystal structure of triploidite and its relation to the structures of other minerals of the triplite-triploidite group
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Studies on the formation of O/W nano-emulsions, by low-energy emulsification method, suitable for cosmeceutical applications.
The formation of oil/water (O/W) nano-emulsions suitable for cosmeceutical application was studied. Nano-emulsions were prepared by using phase inversion composition (PIC) method, one of the low-energy emulsification methods. The process consist of stepwise water addition to oil/surfactant mixture, at T = 25°C. Capryl…
Surface modification of polycarbonate (bisphenol A) by low pressure rf plasma
Effects of low pressure radio frequency (rf) plasma treatment on the surface properties of polycarbonate are presented in this paper. Results obtained from the surface energy measurement after different conditions of treatment are compared. After treatment the surface free energy increased from the original value of 3…