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| 1 | Ellagic acid facilitates indomethacin-induced gastric ulcer healing via COX-2 up-regulation显示文摘导致消炎痛的胃的溃疡在试验性的老鼠模型由 ellagic 酸(EA ) 愈合的机制在我们的学习被描述。溃疡索引(UI ) 和 myeloperoxidase (军邮局) 胃纸巾的活动在消炎痛以后在第三天显示出最大的溃疡(18 mg/kg,单个剂量) 管理。UI 和军邮局活动的初步的观察建议 EA 拥有愈合溃疡的活动。另外的反溃疡参数象前列腺素 E2 的层次那样, cyclooxygenase (艇长) 1 和 2 酶,反煽动性的 cytokines [ interleukin ( IL ) -4 和-5], pro-angiogenic 因素例如脉管的 endothelial 生长因素, hepatocyte 生长因素( HGF ),并且 endothelial 生长因素( EGF )由消炎痛是下面调整的。为 3 天的处理转移了的 EA (7 mg/kg/day ) 导致消炎痛的支持 inflammatory 愈合的生物化学的参数站在一起。这些活动与 EA 的能力被相关改变愈合的 COX-2-dependent 小径。然而, EA 的愈合溃疡的活动被特定的 COX-2 禁止者, celecoxib,和 NS-398 的管理前损害。一起拿,这些结果建议 EA 处理加速溃疡由导致 IL-4 愈合, EGF/HGF 铺平并且提高 COX-2 表示。 | Ananya Chatterjee Sirshendu Chatterjee Smita Das Arpita Saha Subrata Chattopadhyay Sandip K.Bandyopadhyay | 2012 | Acta Biochimica et Biophysica Sinica2012，44，7： | 3 |
| 2 | Inference on disk-jet connection of MAXI J1836–194 from spectral analysis with the TCAF solution显示文摘Galactic transient black hole candidate(BHC)MAXI J1836–194 was discovered on 2011 Aug30,by MAXI/GSC and Swift/BAT.The source activity during this outburst continued for^3 months before entering into the quiescent state.It again became active in March 2012 and continued for another^2 months.In this paper,3-25 keV RXTE/PCA spectra from the 2011 outburst and 0.5-10.0 keV Swift/XRT data during its 2012 outburst are analyzed with the two-component advective flow(TCAF)model based fits files in XSPEC.We calculate the X-ray contributions coming from jets/outflow using a newly developed method based on the deviation of the TCAF model normalization.We also study the correlation between observed radio and estimated jet X-ray fluxes.The correlation indices(b)are found to be 1.79 and 0.61,when the 7.45 GHz Very Large Array(VLA)radio flux is correlated with the total X-ray and jet X-ray fluxes in 3-25 keV range respectively.It has been found that the jet contributes in X-rays up to a maximum of 86%during its 2011 outburst.This makes the BHC MAXI J1836–194 strongly jet dominated during the initial rising phase. | Arghajit Jana Dipak Debnath Sandip KChakrabarti Debjit Chatterjee | 2020 | Research in Astronomy and Astrophysics2020，20，3： | 2 |
| 3 | 显示文摘 | Subhayan Biswas Sandip Chatterjee P Chatterjee | 2002 | Phys Rev B2002，66，21： | 1 |
| 4 | Brain tuberculomas, tubercular meningitis, and post-tubercular hydrocephalus in children显示文摘 | Sandip Chatterjee | 2011 | Journal of Pediatric Neurosciences2011，，： | 1 |
| 5 | Folic acid protects against fluoride-induced oxidative stress and testicular damage in rats显示文摘Objective:To investigate the effects of folic acid on testicular oxidative damage in sodium fluoride-induced male Wistar rats.Methods:A total of 24 male Wistar rats were divided into 4 groups:the control,sodium fluoride(fed with 100 mg/L sodium fluoride through drinking water orally for 21 days),folic acid(36μg/kg body weight/day,orally),and sodium fluoride plus folic acid(received similar dose orally)groups.At the end of 21 days,epididymal sperm parameters,biochemical analysis of testicular tissue,and serum hormonal levels were performed along with histopathological studies.Results:Sodium fluoride intoxication resulted in marked reduction in gonado somatic index,serum luteinizing hormone,and testosterone level along with 3β-hydroxysteroid dehydrogenase and 17β-hydroxysteroid dehydrogenase activities.In addition,reduction in sperm density,as well as loss of sperm motility and sperm viability,were also observed.Besides,increased levels of testicular malondialdehyde,nitrite,interleukin-6 and tumor necrosis factor-α as well as decreased levels of superoxide dismutase and catalase activities and reduced glutathione content were found to be associated with this toxicity.Folic acid co-treatment,on the other hand,could prevent all the sodium fluoride-induced testicular pathophysiology and oxidative stress related parameters.Histological examinations of testicular sections from the experimental rats supported these results.Conclusions:Combining all,this study suggests that being an antioxidant,folic acid plays a beneficial role against fluoride-induced adverse effects on the male reproductive system. | Ray Dibyendu Chatterjee Tiasa Monalisha Das Panda Pradip Mukherjee Sandip | 2021 | Asian pacific Journal of Reproduction2021，10，6： | 0 |
| 6 | Application of Cole-Cole model to transformer oil-paper insulation considering distributed dielectric relaxation显示文摘Researchers have been exploring dielectric testing techniques both in time and frequency domain for insulation condition assessment of oil-paper insulated transformers.In a practical dielectric system,dipoles are found to behave according to a distribution of elementary Debye relaxation properties.Suitable distribution density functions have been proposed to characterise such many-body interaction processes.Cole-Cole diagrams can be one of the methods for studying the nature of frequency dependency of dielectric materials of complex structure.Cole-Cole plots are commonly used for characterising different materials such as dielectric mixtures,ionic liquids,cable insulating oil,polar liquids etc.The scope of its application for assessing transformer oil-paper insulation considering distributed relaxation process has not been explored yet.The present contribution discusses mathematical formulations used for transforming the experimentally obtained time domain dielectric response test data to distribution domain and further to frequency domain for obtaining the Cole-Cole plots.Findings about the influence of various operating conditions and insulation status on the Cole-Cole diagram have been reported in this contribution.Results of tests on field transformers are also presented.This paper attempts to employ the features of Cole-Cole diagrams as potential indicators for analysing condition of the oil-paper insulation considering distributed relaxation process. | Sandip Kumar Ojha Prithwiraj Purkait Biswendu Chatterjee Sivaji Chakravorti | 2019 | High Voltage2019，4，1： | 0 |
| 7 | Accretion flow properties of XTE J1118+480 during its 2005 outburst显示文摘We study spectral and temporal properties of Galactic short orbital period transient black hole XTE J1118+480 during its 2005 outburst using archival data of RXTE PCA and HEXTE instruments in the combined energy range of 3−100 keV.Spectral analysis with the physical two component advective flow(TCAF)model allows us to understand the accretion flow properties of the source.We found that this outburst of XTE J1118+480 is an unconventional outburst as the source was only in the hard state(HS).Our spectral analysis suggests that during the entire outburst,the source was highly dominated by the low angular momentum sub-Keplerian halo rate.Since the source was active in radio throughout the outburst,we make an effort to estimate X-ray contribution of jets to total observed X-ray emissions from the spectral analysis with the TCAF model.The total X-ray intensity shows a similar nature of evolution as that of radio and jet X-ray fluxes.This allowed us to define this‘outburst’also as a jet dominated‘outburst’.Total X-ray flux is also found to subside when jet activity disappears.Our detailed spectral analysis also indicated that although the source was only in the HS during the outburst,in the late declining phase the spectrum became slightly softer due to the slow rise in the Keplerian disk rate. | Dipak Debnath Debjit Chatterjee Arghajit Jana Sandip K.Chakrabarti Kaushik Chatterjee | 2020 | Research in Astronomy and Astrophysics2020，20，11： | 0 |
| 8 | Accretion properties of MAXI J1813-095 during its failed outburst in 2018显示文摘We present the results obtained from detailed timing and spectral studies of a black hole candidate MAXI J1813-095 using Swift,NICER,and NuSTAR observations during its 2018 outburst.The timing behavior of the source is mainly studied by examining NICER light curves in the 0.5−10 keV range.We did not find any signature of quasi-periodic oscillations in the power density spectra of the source.We carry out spectral analysis with a combined disk blackbody&power law model,and physical two-component advective flow(TCAF)model.From the combined disk blackbody&power-law model,we extracted thermal and non-thermal fluxes,photon index and inner disk temperature.We also find evidence for weak reflection in the spectra.We have tested the physical TCAF model on a broadband spectrum from NuSTAR and Swift/XRT.The parameters like mass accretion rates,the size of Compton clouds and the shock strength are extracted.Our result affirms that the source remained in the hard state during the entire outburst which indicates a‘failed’outburst.We estimate the mass of the black hole as 7.4±1.5M⊙from the spectral study with the TCAF model.We apply the LAOR model for the Fe K line emission.From this,the spin parameter of the black hole is ascertained as a^(∗)>0.76.The inclination angle of the system is estimated to be in the range of 28°−45°from the reflection model.We find the source distance to be∼6 kpc. | Arghajit Jana Gaurava K.Jaisawal Sachindra Naik Neeraj Kumari Debjit Chatterjee KaushikChatterjee Riya Bhowmick Sandip KChakrabarti Hsiang-Kuang Chang Dipak Debnath | 2021 | Research in Astronomy and Astrophysics2021，21，5： | 0 |
| 9 | Competition between axial anomaly and ferromagnetic ordering in Bi_(2-x)Fe_(x)Se_(3-x)S_(x) topological insulator:A study of magnetic and magnetotransport properties显示文摘The topological insulators Bi_(2-x)Fe_(x)Se_(3-x)S_(x) have been investigated by the dc-magnetization,magnetotransport and angle resolved photoemission spectroscopy(ARPES)techniques.With doping of Fe and S,a negative giant magneto-resistance(MR)is observed for parallel electric and magnetic fields(H||E).The MR behavior at lower magnetic field can be explained with the semi-classical theory whereas the MR behavior at higher field has been attributed to the axial anomaly.Interestingly,the system reached to the quantum limit at low magnetic field(~4.5T).The magnetic ordering can be explained with the presence of both the RKKY(surface)and van-Vleck(bulk)interaction.The ARPES study reveals that a surface gap is suppressed when the magnetic ordering changes from ferromagnetic to anti-ferromagnetic ordering.The ARPES study and the appearance of quantum oscillations(SdH)in the resistivity pattern reveal that the topological surface property is preserved with the co-doping of Fe and S. | Rahul Singh Shiv Kumar A.Jain Mahima Singh Labanya Ghosh A.Singh Soma Banik A.Lakhani S.Patil E.F.Schwier K.Shimada S.M.Yusuf Sandip Chatterjee | 2022 | Journal of Materiomics2022，8，3： | 0 |
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