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21.
A new chromogenic complex 1.Zn has been synthesized, and its interactions with different biologically important phosphates have been investigated in aqueous solution (pH approximately 7.2). A visual color change can be detected on binding of ATP to 1.Zn, whereas no such change is observed when other biologically related anions (AMP, ADP, PPi, or Phosphate) are used. Complex 1.Zn can also be used as a staining agent for yeast cells allowing detection under normal light microscopy. 相似文献
22.
Jonathan Lee Anupama Yadav Michael Antia Valentina Zaffino Leonid Chernyak 《辐射效应与固体损伤》2017,172(3-4):250-256
The impact of internal irradiation with secondary Compton electrons, generated by gamma-photons, on the characteristics of III-N/GaN-based devices was explored. N-channel AlGaN/GaN high-electron-mobility transistors (HEMTs) were exposed to gamma-radiation from a 60Co source for doses up to 600?Gy. Temperature-dependent electron beam-induced current (EBIC) was employed to measure minority carrier transport properties. For low doses below ~250?Gy, the minority carrier diffusion length in AlGaN/GaN HEMTs is shown to increase by about 40%. This increase is likely due to longer minority carrier lifetime induced by internal Compton electron irradiation. An associated decrease in activation energy, extracted from temperature-dependent EBIC, was also found. The obtained increase in transconductance and decrease in gate leakage current indicate an improvement in performance of the devices after low doses of irradiation. For high doses of gamma-irradiation, above ~300?Gy, the performance of HEMTs showed a deterioration. The deterioration results from the onset of increased carrier scattering due to additional radiation-induced defects, as is translated in a decrease of minority carrier diffusion length. 相似文献
23.
Manandhar Suman Sankhe Runali Priya Keerthi Hari Gangadhar Kumar B. Harish Mehta Chetan H. Nayak Usha Y. Pai K. Sreedhara Ranganath 《Molecular diversity》2022,26(5):2793-2811
Molecular Diversity - Wnt signaling pathway is an evolutionarily conserved pathway responsible for neurogenesis, axon outgrowth, neuronal polarity, synapse formation, and maintenance.... 相似文献
24.
25.
K. Sivashankar Anupama Ranganathan V. R. Pedireddi 《Journal of Chemical Sciences》2000,112(2):147-151
A complex between cyanuric acid (CA), 4,4′-bipyridyl (BP) and Ag(I), with the composition, [Ag2(C3H2N3O3-κN)2 (C10H8N2-κN)] has been prepared. Crystal structure analysis shows that it has a chain structure in which the CA molecules are linked
to the BP units through silver atoms by the formation of N-Ag-N bonds, wherein one of the hydrogens of CA is replaced by Ag(I),
showing thereby the chains connected to one another by N-H...O hydrogen bonds formed between the CA molecules. This intermolecular
chain structure resembles the chain structure of the CA.BP adduct where CA-BP-CA chains formed by N-H...N hydrogen bonds are
linked to one another by N-H...O hydrogen bonds between the CA molecules. 相似文献
26.
G. S. Ranganath 《Molecular Crystals and Liquid Crystals》2013,570(8-9):281-287
We seek solutions to the hydrodynamical equations of smectics and cholesterics in three different circumstances: (a) When permeation is present we find that viscous heating plays a very important part, (b) An arbitrary but constant phase slippage can result in an AC Josephson effect, (c) Thermal expansion of the layers brings down the Binard threshold markedly. 相似文献
27.
The advantages of electroless nickel plating (EN) include excellent corrosion resistance, wear resistance, solderability, low porosity and uniform thickness even on complex parts and ability to plate on nonconductors. In the present study nano ZnO particles were synthesized by using an electrochemical technique and incorporated the particles into Ni-P plates. An alkaline bath was selected and used for nano zinc oxide incorporation. The electrochemical and metallurgical properties of the Ni-nano ZnO-P plates were evaluated and compared with that of the un-reinforced Ni-P plates. The incorporation of the nano ZnO particles resulted in improvement of metallurgical and corrosion resistance characteristics of the plates. 相似文献
28.
We identify the existence of microtransitions in the process of avalanche transmission on load bearing hierarchical networks. It has been seen in earlier work that typical realizations of this network exhibit a second order transition, whereas the critical realization of the network, shows a first order transition. The microtransitions can be used to predict the transition point for both cases. Microtransitions are also seen in the correlation function and scale in a similar way for the critical realisation. We compare the ratios of the peaks of the Fourier spectrum of the correlation function with the structure factor of the network to infer information about the network structure. 相似文献
29.
Das Ranjita S. Warkhade Swapnil K. Kumar Anupama Wankhade Atul V. 《Research on Chemical Intermediates》2019,45(4):1689-1705
Research on Chemical Intermediates - In the present investigation, an efficient visible light-active, graphene oxide-based zirconium oxide nanocomposite (GO–ZrO2) has been synthesized by... 相似文献
30.
Yulia Krupskaya Alexey Alfonsov Anupama Parameswaran Vladislav Kataev Dr. Rüdiger Klingeler Dr. Gunther Steinfeld Norman Beyer Mathias Gressenbuch Berthold Kersting Prof. Dr. Bernd Büchner Prof. Dr. 《Chemphyschem》2010,11(9):1961-1970
The ability of bridging thiophenolate groups (RS?) to transmit magnetic exchange interactions between paramagnetic NiII ions is examined. Specific attention is paid to complexes with large Ni? SR? Ni angles. For this purpose, dinuclear [Ni2L1(μ‐OAc)?I2][I5] ( 2 ) and trinuclear [Ni3L2(OAc)2][BPh4]2 ( 3 ), where H2L1 and H2L2 represent 24‐membered macrocyclic amino‐thiophenol ligands, are prepared and fully characterized by IR‐ and UV/Vis spectroscopy, X‐ray crystallography, static magnetization M measurements and high‐field electron spin resonance (HF‐ESR). The dinuclear complex 2 has a central N3Ni2(μ‐S)2(μ‐OAc)Ni2N3 core with a mean Ni? S? Ni angle of 92°. The macrocycle L2 supports a trinuclear complex 3 , with distorted octahedral N2O2S2 and N2O3S coordination environments for one central and two terminal NiII ions, respectively. The Ni? S? Ni angles are at 132.8° and 133.5°. We find that the variation of the bond angles has a very strong impact on the magnetic properties of the Ni complexes. In the case of the Ni2‐complex, temperature T and magnetic field B dependencies of M reveal a ferromagnetic coupling J=?29 cm?1 between two NiII ions (H=JS1S2). HF‐ESR measurements yield a negative axial magnetic anisotropy (D<0) which implies a bistable (easy axis) magnetic ground state. In contrast, for the Ni3‐complex we find an appreciable antiferromagnetic coupling J′=97 cm?1 between the NiII ions and a positive axial magnetic anisotropy (D>0) which implies an easy plane situation. 相似文献