Reactions of polyhalopyridines. 1. Reaction of the isomeric tetrachlorocyanopyridines and pentachloropyridine with salts of N,N-dialkyldithiocarbamic acid and the X-ray structural investigation of the reaction products

1993 ◽  
Vol 29 (9) ◽  
pp. 1030-1037 ◽  
Author(s):  
A. M. Sipyagin ◽  
Z. G. Aliev
Keyword(s):  
Structural Investigation ◽  
Reaction Products ◽  
X Ray

Structural investigation of spherical hollow excipient Mannit Q by X-ray microtomography

2015 ◽  
Vol 495 (1) ◽  
pp. 140-143 ◽  
Author(s):  
Ryusuke Kajihara ◽  
Shuji Noguchi ◽  
Yasunori Iwao ◽  
Yuki Yasuda ◽  
Megumi Segawa ◽  
...  
Keyword(s):  
Structural Investigation ◽  
X Ray ◽  
Spherical Hollow

scholarly journals Joining of SiO2 glass and 316L stainless steel using Bi–Ag-based active solders

2020 ◽  
Vol 56 (4) ◽  
pp. 3444-3454
Author(s):  
Felix Weber ◽  
Markus Rettenmayr
Keyword(s):  
Stainless Steel ◽  
Cross Sections ◽  
316L Stainless Steel ◽  
Dissimilar Materials ◽  
Intermetallic Phases ◽  
Reaction Products ◽  
Cast State ◽  
Metallic Component ◽  
X Ray ◽  
Solder Interface

Abstract Active brazing is a commonly used method for joining dissimilar materials with at least one non-metallic component. In the present study, joining of SiO2 glass to 316L stainless steel was performed utilizing Bi–Ag-based solders. Ti up to a concentration of 4 and Mg up to 1 wt.% were added as active elements. Microstructures of the solder alloys in the as-cast state and of cross sections of the joined compounds were analysed using scanning electron microscopy and energy-dispersive X-ray spectroscopy. In the as-cast state of the solder, Ti is found in Bi–Ti intermetallic phases; Mg is partially dissolved in the fcc-(Ag) phase and additionally contained in a ternary Ag-Bi-Mg phase. After soldering, a tight joint was generated using several alloy compositions. Ti leads to the formation of reaction products at the steel/solder and glass/solder interfaces, and Mg is exclusively accumulated at the glass/solder interface.

Microtexture of shock reaction products of niobium and silica mixtures

1999 ◽  
Vol 14 (7) ◽  
pp. 3169-3174 ◽  
Author(s):  
Reiko Murao ◽  
Masae Kikuchi ◽  
Kiyoto Fukuoka ◽  
Eiji Aoyagi ◽  
Toshiyuki Atou ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Electron Microscope ◽  
Shock Compression ◽  
Pressure Range ◽  
Reaction Products ◽  
Small Particles ◽  
Powder Mixtures ◽  
X Ray ◽  
Transmission Electron

Shock compression experiments on powder mixtures of niobium metal and quartz were conducted for the pressure range of 30–40 GPa by a 25-mm single-stage propellant gun. Chemical reaction occurred above 35 GPa, and products were found to be mainly so-called “Cu3Au-type” Nb3Si, which contained a small amount of oxygen. Microtextures of the specimen were examined by scanning and transmission electron microscopy. A field-emission transmission electron microscope was used for energy-dispersive x-ray analysis of microtextures in small particles found in the SiO2 matrix, and various species with different Nb/Si ratio and oxygen content were shown to be produced through the nonequilibrium process of shock compression.

Notizen: Synthesis and Structural Investigation of an Unusual Double Hydrogen-Bridged Dimeric Cyclophosphazene Derivative

1976 ◽  
Vol 31 (7) ◽  
pp. 995-996 ◽  
Author(s):  
Graham J. Bullen ◽  
Peter E. Dann ◽  
Moyra L. Evans ◽  
Michael B. Hursthouse ◽  
Robert A. Shaw ◽  
...  
Keyword(s):  
Structural Investigation ◽  
Neutral Molecule ◽  
X Ray ◽  
H Nmr ◽  
Double Hydrogen

The formation, 1H NMR spectroscopic and X-ray crystallographic investigations of a double hydrogen-bridged tricyclic system of a cyclotriphosphazadiene derivative,[N3HP3(O)Cl2(NEt2)3]2are described and discussed. This is the first neutral molecule having both cyclophosphazene and cyclophosphazane character to be structurally investigated.

Structural investigation of Li2SiS3 glass using X-ray RDF

1995 ◽  
Vol 95 (8) ◽  
pp. 499-502 ◽  
Author(s):  
K. Muruganandam ◽  
M. Seshasayee
Keyword(s):  
Structural Investigation ◽  
X Ray

scholarly journals Acid-beta-glycerophosphatase reaction products in the central nervous system mitochondria following x-ray irradiation.

1975 ◽  
Vol 23 (6) ◽  
pp. 402-410 ◽  
Author(s):  
L Roizin ◽  
D Orlovskaja ◽  
J C Liu ◽  
A L Carsten
Keyword(s):  
Central Nervous System ◽  
Nervous System ◽  
Acid Phosphatase ◽  
Enzyme Reaction ◽  
Reaction Products ◽  
Huntington's Chorea ◽  
X Ray ◽  
System A ◽  
Chemical Lesion ◽  
The Central Nervous System

A survey of the literature to date on the enzyme histochemistry of intracellular organelles has not yielded any reference to the presence of acid phosphatase reaction products in the mammalian mitochondria of the central nervous system. A combination of Gomori's acid phosphatase mehtod, however, with standard electron microscopy has disclosed the presence of enzyme reaction products in the mitochondria of the central nervous system of rats from 2 hr to 22 weeks after x-ray irradiation, as well as in a cerebral biopsy performed on a patient affected by Huntington's chorea. No enzyme reaction products, on the other hand, were observed in serial sections that had been incubated in substrates either containing sodium fluoride or lacking in beta-glycerophosphate. The abnormal mitochondrial enzyme reaction (chemical lesion) is considered to be the consequenco of the pathologic process affecting the ultrastructural-chemical organization of the organelle.

scholarly journals Effects of Initial Water Content on Microstructure and Mechanical Properties of Lean Clay Soil Stabilized by Compound Calcium-Based Stabilizer

Materials ◽  
2018 ◽  
Vol 11 (10) ◽  
pp. 1933 ◽  
Author(s):  
Chenglong Yin ◽  
Wei Zhang ◽  
Xunli Jiang ◽  
Zhiyi Huang
Keyword(s):  
Water Content ◽  
Soil Stabilization ◽  
Clay Soil ◽  
Soil Aggregates ◽  
Optical Microscope ◽  
Initial Water Content ◽  
Reaction Products ◽  
Unconfined Compression Test ◽  
Initial Water ◽  
X Ray

Initial water content significantly affects the efficiency of soil stabilization. In this study, the effects of initial water content on the compressibility, strength, microstructure, and composition of a lean clay soil stabilized by compound calcium-based stabilizer were investigated by static compaction test, unconfined compression test, optical microscope observations, environment scanning electron microscopy, energy dispersive X-ray spectroscopy, and X-ray diffraction. The results indicate that as the initial water content increases in the range studied, both the compaction energy and the maximum compaction force decrease linearly and there are less soil aggregates or agglomerations, and a smaller proportion of large pores in the compacted mixture structure. In addition, for specimens cured with or without external water supply and under different compaction degrees, the variation law of the unconfined compressive strength with initial water content is different and the highest strength value is obtained at various initial water contents. With the increase of initial water content, the percentage of the oxygen element tends to increase in the reaction products of the calcium-based stabilizer, whereas the primary mineral composition of the soil-stabilizer mixture did not change notably.

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