scholarly journals Effects of grinding on the physical and chemical properties of crystalline medicinals with microcrystalline cellulose. IV. Comparison of the IR spectra of medicinals in the solid state and in solution.

1980 ◽  
Vol 28 (2) ◽  
pp. 652-656 ◽  
Author(s):  
YOSHINOBU NAKAI ◽  
SHINICHIRO NAKAJIMA ◽  
KEIJI YAMAMOTO ◽  
KATSUHIDE TERADA ◽  
TSUTOMU KONNO
1979 ◽  
Vol 34 (8) ◽  
pp. 1101-1106 ◽  
Author(s):  
A. G. Galinos ◽  
J. K . Kouinis ◽  
P. V. Ioannou ◽  
Th. F . Zafiropoulos ◽  
S. P. Perlepes

The preparation of sixteen new etherate, pyridine and aniline compounds of complex halo and pseudohalo acids of Zn(II) is reported.The study of some physical and chemical properties as well as the UV and IR spectra of these compounds are discussed. Tetrahedral structures are proposed for all compounds in the solid state


2020 ◽  
Vol 49 (28) ◽  
pp. 9556-9563 ◽  
Author(s):  
Samim Khan ◽  
Basudeb Dutta ◽  
Mohammad Hedayetullah Mir

This Frontier article highlights the advancement of [2+2] photocycloaddition reactions within coordination polymers to fine tune their diverse physical and chemical properties.


1983 ◽  
Vol 38 (6) ◽  
pp. 738-746 ◽  
Author(s):  
Reinhold Tacke ◽  
Hartwig Lange ◽  
William S. Sheldrick ◽  
Günter Lambrecht ◽  
Ulrich Moser ◽  
...  

Abstract In the course of systematic investigations on sila-substituted parasympatholytics the diphenyl(2-aminoethoxymethyl)silanols 3b and 4b (and its carbon analogue 4a) were synthesized and characterized by their physical and chemical properties. In the solid state 4a and 4b form strong O-H---N hydrogen bonds, which are intramolecular (4a) and intermolecular (4b), respectively. 4a and 4b were found to be weak antimuscarinic agents (4b >4a) and strong papaverine-like spasmolytics (4a ≈4b).


Author(s):  
Afshan Saleem ◽  
Noureen Rafi ◽  
Sumara Qasim ◽  
Usama Ashraf ◽  
Nasir Hussain Virk

Picric acid and its derivatives are widely used in various applications/industries. The first synthetic dye was prepared in 1771 using picric acid. It was used to dye silk fabric into greenish-yellow color. In this study, Picric acid and their derivatives were synthesized and characterized by their physical and chemical properties. The derivatives of Picric acid which are considered in this research include Picramic acid and Sodium Picramate. The physical properties like melting point, colors, physical state and solubility of Picric acid and its derivatives were determined and confirmed using IR Spectra. IR spectra proved efficient in scanning and mapping.


2001 ◽  
Vol 7 (S2) ◽  
pp. 520-521
Author(s):  
V. Oleshko ◽  
P. Crozier ◽  
L. Garone ◽  
J. Freedman

The unique physical and chemical properties of AgX (X=C1, Br, I) emulsion microcrystals (optical, solid state, transport, chemical and spectral sensitizations and development) account for their use as basic light quanta detectors in practical photography for over 150 years. in spite of the advances made in other recording systems, especially in electronic imaging, contemporary AgX-based photographic materials are still superior in sensitivity and resolution. Although the replacement of AgX-based imaging systems by electronic imaging was already predicted 20 years ago, their current world manufacturing level is now larger than ever. However, in order to be successfully incorporated into digital and hybrid information technologies for the new Millennium, AgX-based photographic materials should further improve their quantum efficiency and image quality. in order to achieve these objectives, the key components should be intentionally modified with a focus primarily at the nanostructural level.


2020 ◽  
Vol 26 (38) ◽  
pp. 4847-4857
Author(s):  
Marta Marín-Luna ◽  
Rosa M. Claramunt ◽  
José Elguero ◽  
Ibon Alkorta

Azoles are a family of five-membered azacyclic compounds with relevant biological and pharmacological activity. Different subclasses of azoles are defined depending on the atomic arrangement and the number of nitrogen atoms present in the ring: pyrazoles, indazoles, imidazoles, benzimidazoles, triazoles, benzotriazoles, tetrazoles and pentazoles. The complete characterization of their structure and the knowledge about their crystal packing and physical and chemical properties are of vital importance for the advancement in the design of new azole-containing drugs. In this review, we report the latest recent contributions to azole chemistry, in particular, those in which theoretical studies have been performed.


2018 ◽  
Vol 284 ◽  
pp. 779-784 ◽  
Author(s):  
Denis V. Tuntsev ◽  
Dmitry B. Prosvirnikov ◽  
R.R. Kozlov

In this paper we present the results of a study of the physical and chemical properties of activated lignocellulose obtained in the process of steam explosion treatment of various breeds of wood. It is shown that fibrous material has a high potential for scientific and commercial use: in the field of production of pulp for paper and cardboard production in a more efficient way, to obtain microcrystalline cellulose by hydrolysis, to produce coarse lignocellulosic fibers for the production of construction and insulation boards with new properties. The scope of activated lignocellulose is not limited only to these directions, but can be significantly expanded due to the competent use of its physical and chemical properties.


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