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排序方式: 共有124条查询结果,搜索用时 218 毫秒
61.
Tushar Ranjan Panda Manikandan M Shreyas P. Vaidya Sushanta Chhatar Suman Sinha Megha Mehrotra Sourav Chakraborty Shubhankar Gadre Prakash Duari Pritha Ray Malay Patra 《Angewandte Chemie (International ed. in English)》2023,62(38):e202303958
Even in the modern era of precision medicine and immunotherapy, chemotherapy with platinum (Pt) drugs remains among the most commonly prescribed medications against a variety of cancers. Unfortunately, the broad applicability of these blockbuster Pt drugs is severely limited by intrinsic and/or acquired resistance, and high systemic toxicity. Considering the strong interconnection between kinetic lability and undesired shortcomings of clinical Pt drugs, we rationally designed kinetically inert organometallic Pt based anticancer agents with a novel mechanism of action. Using a combination of in vitro and in vivo assays, we demonstrated that the development of a remarkably efficacious but kinetically inert Pt anticancer agent is feasible. Along with exerting promising antitumor efficacy in Pt-sensitive as well as Pt-resistant tumors in vivo, our best candidate has the ability to mitigate the nephrotoxicity issue associated with cisplatin. In addition to demonstrating, for the first time, the power of kinetic inertness in improving the therapeutic benefits of Pt based anticancer therapy, we describe the detailed mechanism of action of our best kinetically inert antitumor agent. This study will certainly pave the way for designing the next generation of anticancer drugs for effective treatment of various cancers. 相似文献
62.
Abhimanyu Jana Malay Dolai Bikash Kumar Shaw Shyamal Kumar Saha Mahammad Ali 《Transition Metal Chemistry》2016,41(3):347-355
We have synthesized two mononuclear cobalt(II) complexes (1 and 2) of pyrazole-based bidentate (NN) and tridentate (NNN) tripodal ligands. X-ray crystal structure determination reveals that complex 1 has a tetrahedral geometry, while complex 2 has a trigonal–bipyramidal geometry. Both the complexes have been characterized by variable-temperature magnetic measurements between 2 and 300 K. A weak ferromagnetic exchange interaction (J = +1.5 cm?1) is observed for complex 2. Due to the presence of supramolecular CH···Cl and π···π interactions, a good magnetostructural correlation was found between the D parameter and angular distortion (δ) for complex 1 and related complexes reported in the literature. 相似文献
63.
Nagaraju Barsu Md. Atiur Rahman Malay Sen Prof. Basker Sundararaju 《Chemistry (Weinheim an der Bergstrasse, Germany)》2016,22(27):9135-9138
An efficient and external oxidant‐free, Cp*CoIII‐catalyzed C(sp3)?H bond amidation of 8‐methylquinoline, using oxazolone as an efficient amidating agent, is reported for the first time under mild conditions. The reaction is selective and tolerates a variety of functional groups. Based on previous reports and experimental results, the deprotonation pathway proceeds through an external base‐assisted concerted metalation and deprotonation process. 相似文献
64.
Das Bhriguram Pakrashy Sourav Das Gopal Chandra Das Upasana Alasmary Fatmah Ali Wabaidur Saikh Mohammad Islam Md Ataul Dolai Malay 《Journal of fluorescence》2022,32(4):1263-1277
Journal of Fluorescence - The Schiff-base probe H2VL [6,6'-((1E,1'E)-hydrazine-1,2 diylidenebis(methanylylidene))bis(2-methoxyphenol)] is synthesized and structurally characterized by... 相似文献
65.
A new set of NP problems defined as Courier Problems that is motivated from the requirements in railway wagon scheduling is
proposed. The general version includes many mobile couriers. The simplest version of this will consider a single courier.
An algorithm to transform the single courier problem into a traveling salesman problem is presented. 相似文献
66.
A new and versatile synthetic procedure for the title compound is reported. Two routes for the cyclisation of diazoketones (4) have been developed. 相似文献
67.
This review deals with the dynamics of quantum systems that are subject to high frequency external perturbations. Though the
problem may look hopelessly time-dependent, and poised on the extreme opposite side of adiabaticity, there exists a ‘Kapitza
Window’ over which the dynamics can be treated in terms of effective time-independent Hamiltonians. The consequent results
are important in the context of atomic traps as well as quantum optic properties of atoms in intense and high-frequency electromagnetic
fields.
相似文献
68.
Mistri T Dolai M Chakraborty D Khuda-Bukhsh AR Das KK Ali M 《Organic & biomolecular chemistry》2012,10(12):2380-2384
A highly selective and sensitive fluorescent Zn(2+) sensor, 2,6-bis(2-hydroxy-benzoic acid hydrazide)-4-methylphenol (1), was designed and synthesized. In aqueous THF (4 : 6 v/v) ligand 1 induces a 2 : 1 complex formation with respect to Zn(2+) at physiological pH. This probe features visible light excitation(390 nm) and emission (490 nm) profiles, excellent selectivity responses for Zn(2+)over other competing biological metal ions with K(d) < 1 pM(2), LOD < 1 ng L(-1) and about 680 fold enhancement in fluorescent intensity upon Zn(2+) binding. It also exhibits cell permeability and intracellular Zn(2+) sensing in A375 human melanoma cancer cell. 相似文献
69.
In this paper, the long time and short time behavior of a free quantum Brownian particle and of a quantum harmonic oscillator coupled to a quantum heat bath is investigated for different spectral density functions. Not only are the usual Ohmic, Drude or radiation heat bath schemes employed to derive explicit expressions for the generalized susceptibility χ(t) and the position correlation function σ(t) but also the most intriguing frequency dependent heat bath spectra are considered. Emphasis is laid on the dependence on the low-frequency behavior but in some cases also the high-frequency cutoff becomes relevant. The present investigation also sheds light on the role of boundary in long time and short time behavior of quantum dissipative systems. 相似文献
70.
Mallick A Mandal MC Haldar B Chakrabarty A Das P Chattopadhyay N 《Journal of the American Chemical Society》2006,128(10):3126-3127
Tuning of the sensory capability of a potentially bioactive indoloquinolizine system, namely, 3-acetyl-4-oxo-6,7-dihydro-12H-indolo-[2,3-a]-quinolizine (AODIQ), is described in a biomimicking micellar nanocage. It has been shown that surfactant concentration dictates the sensing behavior of the fluorophore toward physiologically essential trace metals, such as Cu2+. This is a simple, efficient, and general technique that allows one to utilize the sensor to its maximum efficiency. 相似文献