scholarly journals In vitroexperiments and infrared spectroscopy analysis of acid and alkaline phosphatase inhibition by vanadium complexes

2019 ◽  
Vol 43 (45) ◽  
pp. 17603-17619 ◽  
Author(s):  
Juliana E. Parente ◽  
Luciana G. Naso ◽  
Khalil Jori ◽  
Carlos A. Franca ◽  
Ana Maria da Costa Ferreira ◽  
...  
Keyword(s):  
Alkaline Phosphatase ◽  
Infrared Spectroscopy ◽  
Elemental Analysis ◽  
Vanadium Complexes ◽  
Aminobenzoic Acid ◽  
Conductivity Measurements ◽  
Spectroscopy Analysis ◽  
H Nmr ◽  
Acid And Alkaline Phosphatase ◽  
Alkaline Phosphatase Inhibition

Two oxidovanadium complexes with 4-aminobenzoic acid and/or the peroxo anion as ligands were synthesized and characterized by elemental analysis, conductivity measurements, TGA/DTA,1H NMR, EPR, FTIR, and UV/vis spectroscopies.

Synthesis, characterization, crystal structure, electrochemical, solvatochromic and biological investigation of novel N4 and N3 type Cu(ii) Schiff base complexes

2017 ◽  
Vol 41 (21) ◽  
pp. 12554-12561 ◽  
Author(s):  
Akbar Azary ◽  
Abolfazl Bezaatpour ◽  
Saber Zahri ◽  
Mandana Amiri
Keyword(s):  
Crystal Structure ◽  
Schiff Base ◽  
Infrared Spectroscopy ◽  
Elemental Analysis ◽  
Schiff Base Complexes ◽  
Conductivity Measurements ◽  
Biological Investigation ◽  
X Ray ◽  
X Ray Crystallography

In the present study, three novel Cu(ii) Schiff base complexes were synthesized and characterized using infrared spectroscopy, elemental analysis, conductivity measurements and X-ray crystallography.

Divalent Transition Metal Complexes of Potentially Polynucleating 8-Hydroxyquinoline-5-sulfonyl Hydrazone

1994 ◽  
Vol 59 (8) ◽  
pp. 1800-1808
Author(s):  
Said A. Ibrahim ◽  
Sahar A. El-Gyar ◽  
Aly A. Abdel-Hafez ◽  
Mostafa K. Rabia
Keyword(s):  
Antimicrobial Activity ◽  
Nmr Spectroscopy ◽  
Transition Metal Complexes ◽  
Elemental Analysis ◽  
Metal Ion ◽  
Free Ligand ◽  
Chelating Agent ◽  
Conductivity Measurements ◽  
H Nmr ◽  
Trinuclear Complexes

The Co(II), Ni(II), Cu(II) and Zn(II) complexes with 8-hydroxyquinoline-5-sulfonylhydrazone are described. It has been found that the ligand can coordinate to metal ion as a monobasic bidentate chelating agent and it can form di- and trinuclear complexes while acting as a dibasic tetradentate one. The structure of the isolated complexes have been suggested on the basis of elemental analysis, IR, 1H NMR spectroscopy and conductivity measurements. The complexes are all formulated as four-coordinate. Some complexes showed enhanced antimicrobial activity relative to the free ligand.

scholarly journals Synthesis of Calix[4]resorcinarene Based Dyes and its Application in Dyeing of Fibres

2008 ◽  
Vol 5 (s1) ◽  
pp. 1037-1047 ◽  
Author(s):  
Vinod K. Jain ◽  
Shibu G. Pillai ◽  
Parin H. Kanaiya
Keyword(s):  
Elemental Analysis ◽  
Aromatic Compounds ◽  
Anthranilic Acid ◽  
Fastness Properties ◽  
Aminobenzoic Acid ◽  
Colour Difference ◽  
H Nmr ◽  
Colour Strength ◽  
Strength Determination ◽  
Ft Ir

Four new ʻupper rimʼ azocalix[4]resorcinarene have been synthesized by coupling calix[4]resorcinarene with different diazotized aromatic compounds of sulphanilic acid, anthranilic acid,o-aminophenol andp-aminobenzoic acid. The prepared compounds were characterized based on m.p., elemental analysis, FT-IR,1H-NMR. These dyes have been used for the dyeing of textile fibres like cotton and wool. Their fastness properties such as fastness to sunlight, water, washings, and perspiration have also been studied. The synthesized dyes have been employed for computerized colour strength determination through colour matching with known standards. Their L, A*, B*values as well as the colour difference values such as ∆L, ∆A*, ∆B*, ∆C and ∆H have also been reported.

scholarly journals Preparation and Characterization of Cyano Complexes of Oxotungsten(IV) with Mannich Base Ligands

2010 ◽  
Vol 7 (s1) ◽  
pp. S231-S238
Author(s):  
Mohita Sharma ◽  
Mohd Saleem ◽  
Balgar Singh ◽  
H. N. Sheikh ◽  
B. L. Kalsotra
Keyword(s):  
Aqueous Solution ◽  
Magnetic Susceptibility ◽  
Elemental Analysis ◽  
Mannich Base ◽  
Conductivity Measurements ◽  
H Nmr ◽  
Cesium Salts ◽  
Dta Studies ◽  
Cyano Complexes

Oxocyanotungsten(IV) complexes, (Ph3P)2NH2[WO(CN)3L–L]. 3H2O and Cs[WO(CN)3L–L].H2O (where L–L = morpholinobenzyl benzamide (MBB), piperidinobenzyl benzamide (PBB), piperidinobenzyl urea (PBU), piperidinobenzyl thiourea (PBTU), morpholinobenzyl urea (MBU) and morpholinobenzyl thiourea (MBTU)) were synthesized. The complexes have been prepared by the reaction of K3Na [WO2(CN)4].6H2O with morpholinobenzyl urea and related ligands in aqueous solution around pH of 7-8. These have been isolated as bis(triphenylphosphine)iminium or cesium salts. The complexes have been characterized by elemental analysis, IR,1H NMR, UV-Vis spectra, magnetic susceptibility, conductivity measurements and TGA/DTA studies.

Rhenium complexes of P,P,P′,P′-tetrakis(o-hydroxyphenyl)diphosphinoethane

1996 ◽  
Vol 74 (5) ◽  
pp. 722-729 ◽  
Author(s):  
Hongyan Luo ◽  
Chris Orvig
Keyword(s):  
Mass Spectrometry ◽  
Infrared Spectroscopy ◽  
Key Words ◽  
Elemental Analysis ◽  
Ligand Exchange ◽  
Nmr Spectra ◽  
Rhenium Complexes ◽  
Hydrochloride Salt ◽  
H Nmr ◽  
Hexadentate Ligand

Preparation of the hydrochloride salt of a new potentially hexadentate ligand precursor P,P,P′,P′-tetrakis(o-hydroxyphenyl)diphosphinoethane dihydrochloride (abbreviated H4P2O4•2HCl) is described. From H4P2O4•2HCl, neutral [Re2O2Cl2(PPh3)2(μ-P2O4)] and dianionic [Re2O2Br4(μ-P2O4)]2− dinuclear rhenium(V) complexes were synthesized. The complexes have been characterized by elemental analysis, infrared spectroscopy, mass spectrometry, and 1H/31P{1H} NMR spectra. 31P{1H} NMR revealed that only one isomer, presumably the anti, was present for [Re2O2Cl2(PPh3)2(μ-P2O4)], and that two isomers, both anti and syn isomers, were observed for [Re2O2Br4(μ-P2O4)]2−. The coligands (PPh3 for the former, Br− for the latter) of both complexes underwent ligand exchange with pyridine. Key words: rhenium, P,P,P′,P′-tetrakis(o-hydroxyphenyl)diphosphinoethane, dimer, isomers.

Synthesis and Antituberculotic Activity of Some Substituted 3-Arylamino-5-cyano-2-pyrazinecarboxamides

1995 ◽  
Vol 60 (7) ◽  
pp. 1236-1241 ◽  
Author(s):  
Martin Doležal ◽  
Jiří Hartl ◽  
Antonín Lyčka ◽  
Vladimír Buchta ◽  
Želmíra Odlerová
Keyword(s):  
Nucleophilic Substitution ◽  
Elemental Analysis ◽  
Nmr Spectra ◽  
Substituted Anilines ◽  
H Nmr

Nucleophilic substitution of 3-chloro-5-cyano-2-pyrazinecarboxamide by substituted anilines afforded substituted 3-arylamino-5-cyano-2-pyrazinecarboxamides I-X. The structures of compounds were confirmed by elemental analysis, UV, IR and 1H NMR spectra. The assessment of in vitro antimycotic and antimycobacterial activities of the compounds was carried out. The highest antituberculotic activity against M. tuberculosis in this series was shown by 3-anilino- 5-cyano-2-pyrazinecarboxamide (I), whose efficacy was the same as that of pyrazinecarboxamide.

scholarly journals Synthesis of the Guanidine Derivative: N-{[(7-(4,5-Dihydro-1H-imidazol-2-yl)-2-(p-tolyl)-6,7-dihydro-2H-imidazo[2,1-c][1,2,4]triazol-3(5H)-ylidene)amino](phenylamino)methylene}benzamide

Molbank ◽  
10.3390/m1246 ◽  
2021 ◽  
Vol 2021 (3) ◽  
pp. M1246
Author(s):  
Łukasz Balewski ◽  
Anita Kornicka
Keyword(s):  
Infrared Spectroscopy ◽  
Elemental Analysis ◽  
13C Nmr ◽  
1H And 13C Nmr ◽  
Guanidine Derivative

The guanidine derivative N-{[(7-(4,5-dihydro-1H-imidazol-2-yl)-2-(p-tolyl)-6,7-dihydro-2H-imidazo[2,1-c][1,2,4]triazol-3(5H)-ylidene)amino](phenylamino)methylene}benzamide (3) has been obtained by the reaction of one measure of N-{[7-(4,5-dihydro-1H-imidazol-2-yl)-2-(p-tolyl)-6,7-dihydro-2H-imidazo[2,1-c][1,2,4]triazol-3(5H)-ylidene]carbamothioyl}benzamide (2) with one measure of aniline in the presence of mercury(II) chloride and triethylamine in anhydrous dimethylformamide. The structure of product 3 was confirmed by 1H and 13C-NMR, infrared spectroscopy, and elemental analysis.

scholarly journals Application of Near-Infrared Spectroscopy Analysis Technology to Total Nucleosides Quality Control in the Fermented Cordyceps Powder Production Process

2020 ◽  
Vol 2020 ◽  
pp. 1-9
Author(s):  
Tiannv Shi ◽  
Yongmei Guan ◽  
Lihua Chen ◽  
Shiyu Huang ◽  
Weifeng Zhu ◽  
...  
Keyword(s):  
Quality Control ◽  
Infrared Spectroscopy ◽  
Production Process ◽  
Process Monitoring ◽  
Near Infrared Spectroscopy ◽  
Near Infrared ◽  
Powder Preparation ◽  
Spectroscopy Analysis ◽  
Online Process Monitoring ◽  
Online Process

Product quality control is a prerequisite for ensuring safety, effectiveness, and stability. However, because of the different strain species and fermentation processes, there was a significant difference in quality. As a result, they should be clearly distinguished in clinical use. Among them, the fermentation process is critical to achieving consistent product quality. This study aims to introduce near-infrared spectroscopy analysis technology into the production process of fermented Cordyceps powder, including strain culture, strain passage, strain fermentation, strain filtration, strain drying, strain pulverizing, and strain mixing. First, high performance liquid chromatography (HPLC) was used to measure the total nucleosides content in the production process of 30 batches of fermented Cordyceps powder, including uracil, uridine, adenine, guanosine, adenosine, and the process stability and interbatch consistency were analyzed with traditional Chinese medicine (TCM) fingerprinting, followed by the near-infrared spectroscopy (NIRS) combined with partial least squares regression (PLSR) to establish a quantitative analysis model of total nucleosides for online process monitoring of fermented Cordyceps powder preparation products. The model parameters indicate that the established model with good robustness and high measurement precision. It further clarifies that the model can be used for online process monitoring of fermented Cordyceps powder preparation products.

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