Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
Abstract An adiabatic Nernst-Type calorimeter with a cell for condensing a sample vapor as an amorphous state was constructed. By making use of this calorimeter, the heat capacities of the glassy, supercooled liquid, and crystalline states of methanol were measured from 20°K to 120°K. It was found that the state of me…
At 95–115°, paraformaldehyde and hydriodic acid completely C-methylate aromatics such as benzene and phenol. Pyrroles are C-methylated similarly, carbethoxy and acetyl groups being lost. In hydriodic acid at 15–45°, typical pyrroles retain these groups and all free positions are C-alkylated, methylated by paraformalde…
This paper demonstrates how molecular orbital theory can be useful in obtaining chemical information from x-ray absorption spectra. Basic molecular orbital theory concepts such as symmetry and overlap of wavefunctions are used to explain the K-absorption spectra of first-row transition metal complexes. In x-ray K-abso…
The (0001) face of α-Al2O3 has been studied with low-energy electron diffraction. A surface etched with hot phosphoric acid showed the two-dimensional hexagonal 1×1 lattice expected of the bulk (0001) plane. This 1×1 lattice coincides with the lattice of aluminum atoms in this plane. Heating a freshly etched crystal t…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPurification and mechanism of action of proline racemaseGeorge J. Cardinale and Robert H. AbelesCite this: Biochemistry 1968, 7, 11, 3970–3978Publication Date (Print):November 1, 1968Publication History Published online1 May 2002Published inissue 1 November 1968https://doi.o…
Research Article| November 01 1968 Enzyme-catalysed reactions of polycyclic hydrocarbons with deoxyribonucleic acid and protein in vitro P L Grover; P L Grover 1Chester Beatty Research Institute, Institute of Cancer Research: Royal Cancer Hospital, London, S. W. 3 Search for other works by this author on: This Site Pu…
Get PDF Email Share Share with Facebook Tweet This Post on reddit Share with LinkedIn Add to CiteULike Add to Mendeley Add to BibSonomy Get Citation Copy Citation Text Henri Arsenault, "Diffraction Theory of Fresnel Zone Plates," J. Opt. Soc. Am. 58, 1536-1536 (1968) Export Citation BibTex Endnote (RIS) HTML Plain Tex…
The room-temperature reflectance of evaporated amorphous selenium films was obtained between 4 and 14.4 eV. The reflectance spectrum was the same for fresh samples evaporated onto substrates held at 10°, 24°, and 60°C; however, aged selenium films had a 25% lower reflectance between 9 and 14 eV while between 4 and 5 e…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTConformations and crystal packing. The crystal and molecular structure of trans-bis(2,4-pentanedionato)dipyridinenickel(II), Ni(AA)2(py)2Richard C. ElderCite this: Inorg. Chem. 1968, 7, 11, 2316–2322Publication Date (Print):November 1, 1968Publication History Published onlin…
The structural, dielectric, and piezoelectric properties of the solid solution (Na 1‐x ,Li x ,)NbO 2 were studied. Solid solution ceramics with x values up to 0.14 occur as a single phase. The phase diagram from 0° to 600°C is given. The low‐temperature phase has a perovskite pseudo‐monoclinic structure and inverts to…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTIon-exchange equilibriums between glass and molten saltsHarmon M. GarfinkelCite this: J. Phys. Chem. 1968, 72, 12, 4175–4181Publication Date (Print):November 1, 1968Publication History Published online1 May 2002Published inissue 1 November 1968https://pubs.acs.org/doi/10.102…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTManganese porphyrin complexes. I. Synthesis and spectroscopy of manganese(III) protoporphyrin IX dimethyl ester halidesLaurence J. BoucherCite this: J. Am. Chem. Soc. 1968, 90, 24, 6640–6645Publication Date (Print):November 1, 1968Publication History Published online1 May 20…
The diffusion of oxygen in monocrystalline ScaO 3 , YzO 3 , Dy,O 2 , HosO 3 , Er 2 O 3 , Tm 2 O 2 , and Lu 2 O 3 was measured by a thermobalance technique. The reoxidation of partially reduced crystals of these materials was treated as a diffusion‐controlled process with a moving boundary. Large diffusion coefficients…
To examine the conditions brought about upon initiation of core spraying, a 36-rod assembly was heated to different temperatures and then spray cooled. The runs were made at atmospheric pressure using two kinds of assemblies, both made up of heater rods of 15 mm outer sheath diameter, arayed into 6×6 lattice accommoda…
It is shown theoretically that nematic liquid crystals in magnetic fields may display alignment inversion walls partially similar to Bloch and Néel walls in ferromagnetics.Received 25 September 1968DOI:https://doi.org/10.1103/PhysRevLett.21.1518©1968 American Physical Society
Single-domain particles of Fe3O4 have been observed to exhibit superparamagnetic behavior with the Mössbauer effect. Using a simple theory for the spin relaxation, it was possible to make an approximate curve fit of the spectra, taking into account the particle-size distribution of the samples. For a sample prepared b…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDeformation and Breakup of Liquid Droplets in a Simple Shear FieldH. J. Karam and J. C. BellingerCite this: Ind. Eng. Chem. Fundamen. 1968, 7, 4, 576–581Publication Date (Print):November 1, 1968Publication History Published online1 May 2002Published inissue 1 November 1968ht…
The dilatations (negative) caused by neutrons, 40–600 keV electrons, 140 keV H+, D+, He+, and gamma rays are given as a function of dose and are compared. The presaturation dependence is linear for neutrons, He+, and D+, and depends on the 0.5–0.7 power of dose for H+, electrons, and gamma rays. The dilatations are no…
Abstract If the collagen triple helix is so built as to have one set of NH ⃛ O hydrogen bonds of the type N 3 H 3 (A) ⃛ O 2 (B), then it is possible to have a linkage between N 1 H 1 (B) and O 1 (A) through the intermediary of a water molecule with an oxygen O leading to the formation of the hydrogen bonds N 1 (B) ⃛ O…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTRaman spectroscopy of sulfur, sulfur-selenium, and sulfur-arsenic mixturesAnthony T. WardCite this: J. Phys. Chem. 1968, 72, 12, 4133–4139Publication Date (Print):November 1, 1968Publication History Published online1 May 2002Published inissue 1 November 1968https://pubs.acs.…