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2d Ti_(3)C_(2)T_(x)MXene-derived self-assembled 3d TiO_(2)nanoflowers for nonvolatile memory and synaptic learning applications

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Journal of Materials Science & Technology 2023年第19期150卷 1-10页

作者： Atul C.Khot tukaram d.dongale Kiran A.Nirmal Jayan K.deepthi Santosh S.Sutar Tae Geun Kim School of Electrical Engineering Korea UniversityAnam-ro 145Seongbuk-guSeoul 02841Republic of Korea Computational Electronics and Nanoscience Research Laboratory School of Nanoscience and BiotechnologyShivaji UniversityKolhapur 416004India Rajagiri School of Engineering and Technology(Autonomous) Rajagiri ValleyKakkanadKochiKerala 682039India Yashwantrao Chavan School of Rural development Shivaji UniversityKolhapur 416004India

Two-dimensional(2d)semiconducting materials and transition-metal oxides are promising materials for nonvolatile memory and brain-inspired neuromorphic computing ***,it remains chal-lenging to obtain high-quality stacked 2d films with low energy consumptions(or drive currents)be-cause of their high interfacial *** this study,we synthesized 2d Ti_(3)C_(2)T_(x)MXene-derived three-dimensional(3d)TiO_(2)nanoflowers(NFs)as a feasible resistive switching(RS)material with outstanding electronic properties and synaptic learning *** electrical and optical characteristics of the synthesized material were determined through density functional theory *** measure-ments of the Al/Ti_(3)C_(2)T_(x)-TiO_(2)NF/Pt memory device indicated the occurrence of forming-free switching phenomena with extremely low switching voltages(0.68-0.53 V),stable ON/OFF ratio(2.3×103),and retention greater than 105 *** Holt-Winters exponential smoothing technique was used for mod-eling and predicting the switching voltages of the RS *** mechanism underlying the reliable RS was confirmed by observing the dense conductive filaments through conductive atomic force ***,the 2d Ti_(3)C_(2)T_(x)MXene-derived 3d TiO_(2)NF-based RS device mimicked the po-tentiation/depression and spike-time-dependent plasticity of a biological ***,a convolutional neural network was implemented based on the observed synaptic weights of Al/Ti_(3)C_(2)T_(x)-TiO_(2)NF/Pt for image-edge detection.

关键词： MXene Ti_(3)C_(2)T_(x)-TiO_(2)nanoflowers Resistive switching Synaptic learning density functional theory Time-series analysis

An understanding of mitochondria and its role in targeting nanocarriers for diagnosis and treatment of cancer

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Asian Journal of Pharmaceutical Sciences 2021年第4期16卷 397-418页

作者： devendra Choudhary Hanmant Goykar tukaram Karanwad Suraj Kannaujia Vedant Gadekar Manju Misra National Institute of Pharmaceutical Education and Research(NIPER)Ahmedabad PalajOpp.Air force station headqtrsGandhinagar 382355India Graduate School of Pharmacy Gujarat Technological UniversityGandhinagar Campus Nr.Government Polytechnic K-6 CircleE-4 Electronic Estate G.I.D.CSector-26Gandhinagar 382028India

Nanotechnology has changed the entire paradigm of drug targeting and has shown tremendous potential in the area of cancer therapy due to its specificity. In cancer, several targets have been explored which could be utilized for the better treatment of disease. Mitochondria, the so-called powerhouse of cell, portrays significant role in the survival and death of cells, and has emerged as potential target for cancer therapy. direct targeting and nanotechnology based approaches can be tailor-made to target mitochondria and thus improve the survival rate of patients suffering from cancer. With this backdrop, in present review, we have reemphasized the role of mitochondria in cancer progression and inhibition, highlighting the different targets that can be explored for targeting of disease. Moreover, we have also summarized different nanoparticulate systems that have been used for treatment of cancer via mitochondrial targeting.

关键词： Mitochondrial targeting Cancer Nanocarriers Photodynamic therapy Photothermal therapy

A multiwavelength view of the ISM in the merger remnant galaxy Fornax A

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Research in Astronomy and Astrophysics 2013年第8期13卷 885-898页

作者： Swati Pralhadrao deshmukh Bhagorao tukaram Tate Nilkanth dattatray Vagshette Sheo Kumar Pandey Madhav Khushalrao Patil department of Physics Institute of Science department of Physics Balbhim Arts Science and Commerce College School of Physical Sciences Swami Ramanand Teerth Marathwada University School of Studies in Physics & Astrophysics Pandit Ravishankar Shukla University

We present multi-wavelength imagery of the merger remnant galaxy NGC 1316 with an objective to study the dust content and its association with the other phases of the interstellar medium. Color-index maps as well as extinction maps derived for this galaxy reveal an intricate and complex dust morphology in NGC 1316, i.e. there is a prominent lane in the inner part, while at about 6-7 kpc it apparently takes the form of an arc-like pattern extending along the northeast direction. In addition to this, several other dust clumps and knots are also evident in this galaxy. The dust emission mapped using Spitzer data at 8 μm indicates even more complex morphological structures of the dust in NGC 1316. The extinction curve derived over the optical to near-IR bands closely follows the standard Galactic curve, suggesting similar properties of the dust grains. The dust content of NGC 1316, estimated from optical extinction, is ,- 2.13 × 10^5 M⊙. This is a lower limit compared to that estimated using the IRAS flux densities of ,-5.17× 10^6 M⊙ and the flux densities at 24, 70 and 160 p.m from MIPS ,-3.2× 10^7 M⊙. High resolution Chandra observations of this merger remnant system have provided an unprecedented view of the complex nature exhibited by the distribution of hot gas in NGC 1316, which closely matches the morphology of ionized gas and to some extent also the dust. X-ray color-color plots for the resolved sources within the optical d25 extent of NGC 1316 have enabled us to separate them into different classes.

关键词： galaxies individual (NGC 1316) - galaxies: ISM - X-rays: ISM - (ISM:) dust - extinction - galaxies: elliptical and lenticular, cd

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新型糖氨基酸类化合物的合成研究

化学学报 2015年第7期73卷 699-704页

作者：汪学彬王晓丽胡静王兆亚 Pimpalpalle tukaram M Linker Torsten 尹健江南大学生物工程学院糖化学与生物技术教育部重点实验室无锡214122 江南大学无锡医学院无锡214122 department of Chemistry University of Potsdam

糖氨基酸(sugar amino acids,SAAs)是一类同时含有氨基和羧基的糖类衍生物,具有糖和氨基酸的结构特征和化学反应特性,常作为多功能合成砌块用于组合化学的研究、糖模拟物和多肽模拟物的构建等.因此,该类化合物的设计与合成受到国内外化... 详细信息

糖氨基酸(sugar amino acids,SAAs)是一类同时含有氨基和羧基的糖类衍生物,具有糖和氨基酸的结构特征和化学反应特性,常作为多功能合成砌块用于组合化学的研究、糖模拟物和多肽模拟物的构建等.因此,该类化合物的设计与合成受到国内外化学家的持续关注.在本文中,我们发展了一种简单、高效的合成新型糖氨基酸的方法,从廉价易得的3,4,6-O-三乙酰基-d-葡萄糖烯和3,4,6-O-三乙酰基-d-半乳糖烯出发,在硝酸铈铵(CAN)的作用下通过一步自由基加成反应分别得到2-C-二羧酸酯类化合物gluco-2和galacto-2,再经过脱羧、脱乙酰、碘代、叠氮化钠取代和一锅法还原氨化反应,以最短直线步骤6步实现了糖氨基酸gluco-7(总收率34%)和galacto-7(总收率19%)的合成.所有合成的化合物均经过IR,1H NMR,13C NMR和HRMS的表征.

关键词：糖氨基酸糖烯自由基加成一锅法反应合成

Multiphase ISM in Nearby Early Type Galaxy IC 5063

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International Journal of Astronomy and Astrophysics 2018年第1期8卷 79-93页

作者： Bhagorao tukaram Tate Anil Tejerao Kyadampure Sheo Kumar Pandey Madhav Khushalrao Patil department of Physics Balbhim Arts Science and Commerce College Beed India School of Physical Sciences S. R. T. M. University Nanded India department of Physics Sanjeevani Mahavidyalaya Chapoli India School of Studies in Physics & Astrophysics Pt. R.S. University Raipur Chattisgarh India

A multiwavelength study of a nearby dust lane early-type galaxy IC 5063 is presented. The objectives are to investigate dust extinction properties and the association of interstellar dust with other phases of ISM. The color-index maps as well as the extinction maps derived from the analysis of deep CCd observations in optical passbands revealed a prominent dust lane along its optical major axis in the inner region. In addition, two more fainter and extended dust patterns are apparent in the color index map as well as extinction maps. These features are also evident in the smooth model subtracted residual maps. The extinction curve derived for this galaxy revealed that dust grains in it are identical to the canonical grains in the Milky Way with the dust grains little larger than the canonical grains. The total extinction measured in the V band extinction map enabled us to quantify the dust content of this galaxy to be equal to , an order of magnitude shorter than that estimated using the IRAS flux densities at 60 and 100 μm. A Multiphase ISM study revealed a surprising similarity in the morphologies of the Hα emitting ionized gas distribution and X-ray emitting gas. Systematic analysis of high resolution X-ray observations using Chandra telescope enabled us to detect 18 discrete X-ray sources within optical d25 region of IC 5063, out of which 17 sources were separated out as the low mass X-ray binaries and one as the high mass X-ray binary source in the X-ray color-color plot.

关键词： dust Extinction Galaxies: Individual (IC 5063) ISM

In vitro evaluation of antimicrobial and antioxidant activity of dragon’s blood tree(dracaena cinnabari Balf.f.)of Socotra Island(Yemen)

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Journal of Coastal Life Medicine 2013年第2期 123-129页

作者： Abu-Taleb Ahmed Yehia Fahad Ahmed Mohsen Alzowahi tukaram Angadrao Kadam Rafik Usman Shaikh department of Microbiology School of Life SciencesS.R.T.M.UniversityNanded-431606(MS)India department of Microbiology Taiz UniversityYemen

Objective:To evaluate the performance of preliminary phytochemical,antioxidant and antimicrobial activities of dracaena cinnabari Balf.f.(Agavaceae)(***)resin,collected from Socotra Island(Yemen).Methods:The powdered stem resin is extracted with different solvents by using Soxhlet apparatus and evaluated for antioxidant and antimicrobial activity against three Gram positive bacteria(Bacillus cereus NCIM 2106,Staphylococcus aureus NCIM 2127,and Micrococcus luteus NCIM 2169),seven Gram negative bacteria(Escherichia coli NCIM 2924,Pseudomonas aeruginosa NCIM 2863,Salmonella typhimurium NCIM 2501,Klebsiella aerogenes NCIM 2281,Proteus morganii NCIM 2860,Escherichia coli dh5α,Escherichia coli CSH)and three fungi(Candida albicans MTCC 227,Aspergillus flavus MTCC 873,Aspergillus niger MTCC 1781).Results:The antimicrobial activity data revealed that,the selected microorganisms possess varied sensitivity response to chloroform extract followed by methanol and benzene extract of *** stem *** samples also possess a potent dPPH,OH and SO radical scavenging *** addition,the preliminary phytochemical analysis demonstrated the presence of alkaloids,flavonoids,terpenoids and other organic compounds which could be reason for antimicrobial activities of *** ***:The present study is strengthened for the discovery and development of new antioxidant and antimicrobial drugs from *** resin which encourage us to continue with pure fractions.

关键词： dracaena cinnabari Socotra Yemen Resin Antimicrobial Antioxidant Phytochemical screening