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141.
Madhu N. T. Radhakrishnan P. K. Grunert M. Weinberger P. Linert W. 《Journal of Thermal Analysis and Calorimetry》2004,76(3):813-821
The phenomenological, kinetic and mechanistic aspects of thermal decomposition of perchlorate, nitrate, chloride, bromide
and iodide complexes of cobalt(II) with the Schiff base 1,2-bis(imino-4'-antipyrinyl)ethane (GA) have been studied by TG and
DTG analyses. The kinetic parameters like the activation energy, pre-exponential factor and entropy of activation were calculated.
The decomposition reactions follow 'random nucleation with one nucleus on each particle - Mampel model'.
This revised version was published online in July 2006 with corrections to the Cover Date. 相似文献
142.
Mangali Madhu Sekhar Gundala Sravya Venkatapuram Padmavathi Adivireddy Padmaja Rayalacheruvu Usha Perikala Supraja 《Research on Chemical Intermediates》2016,42(12):7947-7962
A new class of 1,3- and 1,4-phenylene linked bis(azoles) were prepared from E-cinnamohydrazide, isophthalic/terephthalic acids adopting ultrasonication methodology and tested for antimicrobial activity. Amongst all the tested compounds 7c, 9a, and 9c are potential antimicrobial agents against S. aureus and P. chrysogenum. 相似文献
143.
Kurumanna A. Ashok K. Rambabu S. Sonyanaik B. Ravi D. Madhu P. Sakram B. 《Russian Journal of General Chemistry》2017,87(11):2703-2711
Russian Journal of General Chemistry - A novel and efficient aromatization of tetrahydro-β-carbolines under mild conditions using K2S2O8 as a catalyst was developed. The method is applicable... 相似文献
144.
Simultaneous quantitation of acetylsalicylic acid and clopidogrel along with their metabolites in human plasma using liquid chromatography tandem mass spectrometry
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Yashpal S. Chhonker Chandra P. Pandey Hardik Chandasana Tulsankar Sachin Laxman Yarra Durga Prasad V. S. Narain Madhu Dikshit Rabi S. Bhatta 《Biomedical chromatography : BMC》2016,30(3):466-473
The interest in therapeutic drug monitoring has increased over the last few years. Inter‐ and intra‐patient variability in pharmacokinetics, plasma concentration related toxicity and success of therapy have stressed the need of frequent therapeutic drug monitoring of the drugs. A sensitive, selective and rapid liquid chromatography coupled with tandem mass spectrometry (LC‐MS/MS) method was developed for the simultaneous quantification of acetylsalicylic acid (aspirin), salicylic acid, clopidogrel and carboxylic acid metabolite of clopidogrel in human plasma. The chromatographic separations were achieved on Waters Symmetry ShieldTM C18 column (150 × 4.6 mm, 5 µm) using 3.5 mm ammonium acetate (pH 3.5)–acetonitrile (10:90, v/v) as mobile phase at a flow rate of 0.75 mL/min. The present method was successfully applied for therapeutic drug monitoring of aspirin and clopidogrel in 67 patients with coronary artery disease. Copyright © 2015 John Wiley & Sons, Ltd. 相似文献
145.
Ivan ?alitro? N. T. Madhu Roman Bo?a Ján Pavlik Mario Ruben 《Monatshefte für Chemie / Chemical Monthly》2009,34(4):695-733
Abstract
Since the discovery of the spin transition phenomenon in tris(N,N-dialkyldithiocarbamato) iron(III) complexes [1], numerous investigations have been devoted to this field of molecular magnetism. The spin transition phenomenon is probably the most spectacular example of bistability in molecular chemistry. However, it is a challenge to obtain spin transition materials when working under ambient conditions (e.g. room temperature and pressure), which would be highly advantageous for potential applications. So far, only some Fe(II) and Fe(III) molecular systems have shown temperature-induced spin transitions around and even above room temperature. Within this review we discuss the characteristics of this class of bistable compounds in detail and we try to draw more general conclusions regarding the integration, implementation and application of spin transition compounds as switching elements in hybrid molecular devices. 相似文献146.
R. V. S. S. N. Ravikumar N. Madhu A. V. Chandrasekhar B. J. Reddy Y. P. Reddy P. Sambasiva Rao T. M. Rajendiran R. Venkatesan 《Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy》2001,57(14)
Single crystal electron paramagnetic resonance (EPR) studies were carried at room temperature for VO(II) doped zinc potassium phosphate hexahydrate. The results indicate that the paramagnetic impurity has entered the lattice only substitutionally, as confirmed by the single crystal rotations. The spin Hamiltonian parameters calculated from the spectra are g//=1.9356, g=1.9764, A//=200.9 G and A=76.5 G. The optical absorption spectrum exhibits three bands (800, 670 and 340 nm) suggesting the C4v symmetry and the optical parameters evaluated are Dq=1492, Ds=−3854 and Dt=186 cm−1. 相似文献
147.
IntroductionThemeasurementofshearstressinarterialflowhasbeenbestowedbynaturebecauseofthepossiblerelationbetweentheshearstressatthewallandexistenceofatherosclerosis.Theflowphenomenainlargeandmediumsizedarteriesinfluencethedevelopmentofatherosclerosicd… 相似文献
148.
Jayaraman Pitchaimani Nanjappan Gunasekaran Savarimuthu Philip Anthony Dohyun Moon Vedichi Madhu 《应用有机金属化学》2019,33(6)
A series of air‐stable, phosphine‐free arene ruthenium (II)–NNN pincer complexes (RuL, RuL1, RuL2 and RuL3) have been synthesized and characterized by spectroscopic and single‐crystal X‐ray analysis. Further, arene ruthenium (II)–NNN pincer complexes have been used as catalyst for hydrogenation of nitroaromatics into aniline in the presence of NaBH4 at room temperature. The catalytic process suggested highly chemo‐selective nitroreduction with wide functional group tolerance. 相似文献
149.
A comparative systematic kinetic study of crystallization among various smectogens of higher homologues of the benzylidene aniline nO.m series (9O.2, 13O.2, 14O.2, 15O.2, 16O.2, 2O.16, 11O.16, 16O.16 and 18O.16) has been carried out by thermal microscopy and differential scanning calorimetry (DSC). The DSC thermograms were run from crystallization temperature to the isotropic melt for different time interval. The liquid crystalline behaviour together with rate of crystallization of smectic ordering in newly synthesized nO.m compounds (16O.2, 2O.16, 11O.16, 16O.16, 18O.16) with respect to their lower homologues are discussed in relation to the kinetophase (which occurs prior to the crystallization), end chain lengths, the odd-even effect and chain length ratio. The molecular mechanism and dimensionality in the crystal growth were computed from the Avrami equation. The characteristic crystallization time (t*) at each crystallization temperature was deduced from the individual plots of log t vs. DeltaH. Further, a qualitative approach was made to the crystallization process in smectic layers. 相似文献
150.
Santosh Kumar Rai Meena Sharma Madhu Jain Abhishek Awasthi Dharmendra Kumar Purshottam Narayanan Kuttanpillai Nair Ashok Kumar Sharma 《Applied biochemistry and biotechnology》2010,162(7):1929-1937
An efficient in vitro process for rapid production of cloned plants of Uraria picta has been developed employing nodal stem segments taken from field-grown plants. Explants showed bud-break followed by regeneration
of shoots with restricted growth within 12 days on modified Murashige and Skoog’s medium supplemented with 0.25 mg l–1 each of 6-benzylaminopurine and indole-3-acetic acid and 25 mg l-1 adenine sulfate. Normal growth of shoots with good proliferation rate was achieved by reducing the concentrations of 6-benzylaminopurine
and indole-3-acetic acid to 0.1 mg l-1 each and incorporating 0.5 mg l-1 gibberellic acid in the medium in which, on an average, 19.6 shoots per explant were produced. Further, during successive
subcultures, increased concentrations of adenine sulfate (50 mg l-l) and gibberellic acid (2 mg l-l) along with the addition of 20 mg l-l
dl-tryptophan were found conducive to control the problem of necrosis of shoots. In this treatment, several “crops” of shoots
were obtained from single culture by repeated subculturing of basal portion of stalk in long-term. Isolated shoots rooted
100% in 0.25 mg l-1 indole-3-butyric acid. In vitro-raised plants after hardening in inorganic salt solution grew normally in soil and came to
flowering. Genetic fidelity of in vitro-raised plants was ascertained by rapid amplified polymorphic DNA (RAPD) markers. Also,
quantitative estimation of two isoflavonones in their root extracts further confirmed true-to-type nature of plantlets. 相似文献