排序方式: 共有209条查询结果,搜索用时 0 毫秒
61.
In this paper, a nondifferentiable multiobjective programming problem is considered where every component of objective and constraint functions contain a term involving the support function of a compact convex set. A new class of higher order (F,α,ρ,d)-type I function is introduced. Necessary optimality conditions and the duality theorems for Wolfe and unified higher order dual problems are established. Several known results can be deduced as special cases. 相似文献
62.
S. Divya V. P. N. Nampoori P. Radhakrishnan A. Mujeeb 《Applied Physics A: Materials Science & Processing》2014,114(4):1079-1084
Nanostructured TiO2 in different shapes such as nanosheet, nanowire, and nanoflower, as well as nanosphere have been prepared and characterized. Nonlinear optical (NLO) properties were measured at 532 nm using open and closed aperture Z-scan technique with respect to the shape. NLO behaviour of the nanostructured TiO2 is found to be shape dependent in suspensions at the investigated wavelengths and is accounted in terms of effective surface-to-volume ratio of the structures. The values of different optical constants viz, β,n 2,χ (3) for different morphological structures were evaluated and compared. The optical limiting thresholds of the samples were also investigated and it is found to decrease with increase in the net light matter interaction area of the sample. 相似文献
63.
Monika Bhardwaj Poonam Yadav Divya Vashishth Kavita Sharma Ajay Kumar Jyoti Chahal Sunita Dalal Sudhir Kumar Kataria 《Molecules (Basel, Switzerland)》2021,26(11)
Obesity is a serious health complication in almost every corner of the world. Excessive weight gain results in the onset of several other health issues such as type II diabetes, cancer, respiratory diseases, musculoskeletal disorders (especially osteoarthritis), and cardiovascular diseases. As allopathic medications and derived pharmaceuticals are partially successful in overcoming this health complication, there is an incessant need to develop new alternative anti-obesity strategies with long term efficacy and less side effects. Plants harbor secondary metabolites such as phenolics, flavonoids, terpenoids and other specific compounds that have been shown to have effective anti-obesity properties. Nanoencapsulation of these secondary metabolites enhances the anti-obesity efficacy of these natural compounds due to their speculated property of target specificity and enhanced efficiency. These nanoencapsulated and naive secondary metabolites show anti-obesity properties mainly by inhibiting the lipid and carbohydrate metabolizing enzymes, suppression of adipogenesis and appetite, and enhancing energy metabolism. This review focuses on the plants and their secondary metabolites, along with their nanoencapsulation, that have anti-obesity effects, with their possible acting mechanisms, for better human health. 相似文献
64.
Pradeep Savitha Devaswamparambil Sebastian Deepa Gopalakrishnan Anjali Krishna Manoharan Divya Kizhakkeppurath Madhusudhanan Dhanya Thaikatt Mohanan Puzhavoorparambil V. 《Journal of fluorescence》2021,31(4):1113-1123
Journal of Fluorescence - A heterocyclic Schiff base (MPDPI)was synthesized by the condensation reaction of 1-phenylisatin with 4,5-dimethylphenylene diamine. It was characterized by using... 相似文献
65.
Divya Chalapathi Amrendra Kumar Pratik Behera Shijulal Nelson Sathi Rajaram Swaminathan Chandrabhas Narayana 《Molecules (Basel, Switzerland)》2022,27(20)
Protein misfolding and aggregation play a significant role in several neurodegenerative diseases. In the present work, the spontaneous aggregation of hen egg-white lysozyme (HEWL) in an alkaline pH 12.2 at an ambient temperature was studied to obtain molecular insights. The time-dependent changes in spectral peaks indicated the formation of β sheets and their effects on the backbone and amino acids during the aggregation process. Introducing iodoacetamide revealed the crucial role of intermolecular disulphide bonds amidst monomers in the aggregation process. These findings were corroborated by Molecular Dynamics (MD) simulations and protein-docking studies. MD simulations helped establish and visualize the unfolding of the proteins when exposed to an alkaline pH. Protein docking revealed a preferential dimer formation between the HEWL monomers at pH 12.2 compared with the neutral pH. The combination of Raman spectroscopy and MD simulations is a powerful tool to study protein aggregation mechanisms. 相似文献
66.
67.
A Three‐Photon Active Organic Fluorophore for Deep Tissue Ratiometric Imaging of Intracellular Divalent Zinc 下载免费PDF全文
Divya Susan Philips Dr. Sivaramapanicker Sreejith Prof. Dr. Tingchao He Nishanth Venugopal Menon Palapuravan Anees Dr. Jomon Mathew Prof. Dr. Sreedharan Sajikumar Prof. Dr. Yuejun Kang Prof. Dr. Mihaiela Corina Stuparu Prof. Dr. Handong Sun Prof. Dr. Yanli Zhao Prof. Dr. Ayyappanpillai Ajayaghosh 《化学:亚洲杂志》2016,11(10):1523-1527
Deep tissue bioimaging with three‐photon (3P) excitation using near‐infrared (NIR) light in the second IR window (1.0–1.4 μm) could provide high resolution images with an improved signal‐to‐noise ratio. Herein, we report a photostable and nontoxic 3P excitable donor‐π‐acceptor system (GMP) having 3P cross‐section (σ3) of 1.78×10?80 cm6 s2 photon?2 and action cross‐section (σ3η3) of 2.31×10?81 cm6 s2 photon?2, which provides ratiometric fluorescence response with divalent zinc ions in aqueous conditions. The probe signals the Zn2+ binding at 530 and 600 nm, respectively, upon 1150 nm excitation with enhanced σ3 of 1.85×10?80 cm6 s2 photon?2 and σ3η3 of 3.33×10?81 cm6 s2 photon?2. The application of this probe is demonstrated for ratiometric 3P imaging of Zn2+ in vitro using HuH‐7 cell lines. Furthermore, the Zn2+ concentration in rat hippocampal slices was imaged at 1150 nm excitation after incubation with GMP, illustrating its potential as a 3P ratiometric probe for deep tissue Zn2+ ion imaging. 相似文献
68.
Divya P. V. Kaliprasad C. S. Narayana Y. Prakash V. 《Journal of Radioanalytical and Nuclear Chemistry》2019,322(1):121-127
Journal of Radioanalytical and Nuclear Chemistry - Some of the coastal parts of Kerala are well reported high background radiation areas (HBRA). Hence, the radiological protection of the population... 相似文献
69.
Divya B. Tripathy Anuradha Mishra James Clark Thomas Farmer 《Comptes Rendus Chimie》2018,21(2):112-130
Surfactant use throughout mankind is extensive, from their initial applications as detergents extending to use in medicine, lubricant, cosmetics and even enhanced oil recovery. However, the image of surfactant use has in the past been tarnished by issues with low biodegradability and their synthesis from nonsustainable resources. Amino acid–based surfactants are a class of surfactants derived from a hydrophobe source coupled with simple amino acids, mixed amino acids from synthesis or from protein hydrolysates, and as such can be derived solely from renewable resources. There are several pathways for their synthesis and this allows for extensive structural diversity in this class of surfactants, resulting in widespread tuneable functionality in their physiochemical properties. This review includes the details of most of the available routes of synthesis for amino acid surfactants (AASs) and the impact of the diverse routes on their final physiochemical properties, including solubility, dispersability, toxicity and biodegradability. The diversity offered by the structural variation in AASs offers many exciting commercial opportunities for this ever-growing class of surfactants. It also includes a discussion on current and future potential uses of AASs. 相似文献
70.