http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
M.M.Sinha,JinSeungKim,K.H.Lee 한국물리학회 2003 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.43 No.1
The derivation of exact analytic expressions for the vibrational characteristics of a linear chain is an important problem in crystal lattice dynamics. The adoption of a periodic boundary condition (PBC) in a one-dimensional lattice with impurities eliminates boundary re ections, inter-impurity interactions, and impurity-boundary interactions. The correct description of the impurity-impurity interaction necessitates the adoption of a more realistic general boundary condition (GBC). The dynamics of a nite one-dimensional lattice with two impurities is studied under the GBC. The normal mode frequencies of vibration are calculated under three possible GBCs: x0(t) and fN(t), x0(t) and xN(t), and f0(t) and fN(t). The eect of the impurity mass on the normal modes is also investigated. The calculated results are in agreement with existing theory.
Narayan Chandra Sinha,M. Ataharul Islam,Kazi Saleh Ahmed 한국통계학회 2006 Journal of the Korean Statistical Society Vol.35 No.4
To identify whether the sequence of observations follows a chain depen-dent process and whether the chain dependent or repeated observations fol-low a stationary process or not, alternative procedures are suggested in thispaper. These test procedures are formulated on the basis of logistic re-gression model under the likelihod ratio test criterion and applied to thedaily rainfall occurrence data of Bangladesh for selected stations. Thesetest procedures indicate that the daily rainfall occurrences follow a chaindependent process, and the dierent ypes of transition probabilities andoverall transition probabilities of Markov chain for the occurrences of rain-fall follow a stationary process in the Mymensingh and Rajshahi areas, andnon-stationary process in the Chittagong, Faridpur and Satkhira areas.AMS 2000 subject classications.Primary 62M02; Secondary 62J12.Keywords. Transition probabilities, logistic regression, Markov chain, ML estimation,likelihood ratio test, daily rainfall occurrence data.1. IntroductionMarkov chain provides probability models under stochastic process to describedierent ypes of transition probabilities for chain or time dependent data. Thelogistic regression model is also a probabilistic model for analyzing binary data.By utilizing logistic regression model Muenz and Rubinstein (1985) developeddierent ypes of covariate dependent transition probabilities of Markov chain.Received May 2005; accepted December 2005.1Corresponding author. Monitoring Cell, Finance Division, Ministry of Finance, Dhaka-1000,Bangladesh (e-mail: ncsinha2002@yahoo.com)
실험적 녹농균각막염 모델에서 인터페론 조절인자와 산화질소 합성요소의 발현
현준영,DebasishSinha,TerrenceP.O’Brien,이진학,위원량,.Joon Young Hyon. M.D.... Debasish Sinha. Ph.D... Terrence P. O`Brien. M.D.. Jin Hak Lee. M.D... Won Ryang Wee. M.D... 대한안과학회 2006 대한안과학회지 Vol.47 No.10
Purpose: To investigate the expression of IRF-1, IRF-7 and iNOS in the mice model of Pseudomonas aeruginosa keratitis. The enzymatic activity of iNOS and its expression were also investigated. Methods: With western blot analysis, the protein expression of IRF-1, IRF-7 (at 24 hours), and iNOS (at 12 hours and 24 hours) were evaluated in the mouse model of P. aeruginosa keratitis. iNOS enzymatic activity was determined with a scintillation counter. IRF-1 and IRF-7 expression were localized with immunofluorescent labeling. The wounded control group was given the same corneal wound without bacterial inoculation, and the fellow eyes served as normal controls. Results: Expression of IRF-1, IRF-7 and iNOS was highly upregulated in corneas with P. aeruginosa keratitis compared to normal or wounded corneas. iNOS enzymatic activity also was higher in infected than normal corneas. In wounded corneas, NOS2 expression and activity slightly increased at 12 hours after the infection. Intense IRF-1 immunopositivity was seen in the epithelial layer of infected corneas. Some corneal stromal cells and endothelial cells showed moderate positive labeling in infected corneas. IRF-7 showed intense labeling in the epithelial layer and endothelial cells of normal as well as infected corneas. Increased IRF-7 labeling was observed in epithelial cells in the ulcerated region of infected corneas. Conclusions: These results suggest that IRF-1, IRF-7 and iNOS may play a regulatory role in the immune responses and wound healing process in P. aeruginosa keratitis.
PURIFICATION AND PROPERTIES OF EXTRACELLULAR NUCLEASE(S) FROM RUMEN CONTENTS OF BUBALUS BUBALIS
Sinha, P.R.,Dutta, S.M. Asian Australasian Association of Animal Productio 1990 Animal Bioscience Vol.3 No.2
Extracellular nuclease(s) in buffalo rumen fluid were purified from strained rumen fluid by a procedure involving Seitz filtration, acetone fractionation and gel filtration on Sephadex G-100. The enzyme resolved into two peaks exhibiting both DNase and RNase activities. The molecular weight of enzyme corresponding to peaks I and II were approximately 30,000 and 12,000 respectively. The properties of enzymes from the two peaks, however, were same. Optimum temperature for both DNase and RNase activities was at $50^{\circ}C$. Whereas DNase activity was stable upto $60^{\circ}C$, RNase activity was stable only up to $50^{\circ}C$. DNase activity recorded two pH optima, one at pH 5.5 and the other at pH 7.0. RNase activity recorded a broad pH optimum between pH 6.0-8.0. pH stability of the enzyme coincided with pH optima for both the activities. DNase activity was stimulated by $Mg^{2+}$ and $Mn^{2+}$ and inhibited by $Fe^{2+}$, $Zn^{2+}$, $Hg^{2+}$ and $Ag^+$. RNase activity was also stimulated by $Mg^{2+}$ and $Mn^{2+}$ and inhibited by $Cu^{2+}$, $Fe^{2+}$, $Zn^{2+}$, $Hg^{2+}$ and $Ag^+$. Reducing agents stimulated both the activities.
Sinha Narayan Chandra,Islam M. Ataharul,Ahmed Kazi Saleh The Korean Statistical Society 2006 Journal of the Korean Statistical Society Vol.35 No.4
To identify whether the sequence of observations follows a chain dependent process and whether the chain dependent or repeated observations follow stationary process or not, alternative procedures are suggested in this paper. These test procedures are formulated on the basis of logistic regression model under the likelihood ratio test criterion and applied to the daily rainfall occurrence data of Bangladesh for selected stations. These test procedures indicate that the daily rainfall occurrences follow a chain dependent process, and the different types of transition probabilities and overall transition probabilities of Markov chain for the occurrences of rainfall follow a stationary process in the Mymensingh and Rajshahi areas, and non-stationary process in the Chittagong, Faridpur and Satkhira areas.
Trends of Smokeless Tobacco use among Adults (Aged 15-49 Years) in Bangladesh, India and Nepal
Sinha, Dhirendra N,Rizwan, SA,Aryal, Krishna K,Karki, Khem B,Zaman, Mostafa M,Gupta, Prakash C Asian Pacific Journal of Cancer Prevention 2015 Asian Pacific journal of cancer prevention Vol.16 No.15
Background: Smokeless tobacco (SLT) has long been realized as an important component of the fight for global tobacco control. It still remains a major problem in countries like India, Bangladesh and Nepal. The objective of this study was to estimate the trends of SLT use in three countries of the SEARO WHO office. Materials and Methods: We used data from national surveys in three countries (Bangladesh, India and Nepal) to estimate trends in prevalence of current SLT use. All available nationally representative data sources were used. Estimates were weighted, age standardized and given along with 95% confidence intervals. Significance of linear trend in prevalence over time was tested using the Cochrane-Armitage test for trend. A p value of less than 0.05 was considered statistically significant. Results: We identified three surveys for Bangladesh, three for India and four for Nepal that met the selection criteria (such as Demographic and Health Surveys, WHO-STEPwise approach to Surveillance and Global Adult Tobacco Surveys). A significantly increasing trend was noticed in the prevalence of current SLT use among Bangladeshi men (20.2% to 23%, p=0.03). In India, a similar significantly increasing trend was seen among men (27.1% to 33.4%, p<0.001) and women (10.1% to 15.7%, p<0.001). In Nepal, there was a no significant trend among both men (39.1% to 31.6%, p=0.11) and women (5.6% to 4.7%, p=0.49). Conclusions: In the study countries SLT use has remained at alarmingly high levels. Usage trends do not show any signs of decline in spite of control efforts. Tobacco control measures should focus more on controlling SLT use.
DEGRADATION OF NUCLEIC ACIDS BY CELL-FREE EXTRACT OF MIXED RUMEN PROTOZOA OF BUFFALO RUMEN
Sinha, P.R.,Dutta, S.M.. Asian Australasian Association of Animal Productio 1988 Animal Bioscience Vol.1 No.4
Degradation of deoxyribonucleic acid(DNA) and ribonucleic acid(RNA) by cell-free extract of mixed rumen protozoa of buffalo rumen was investigated. DNA was observed to be degraded rapidly during an initial incubation period of 2 hr with simultaneous appearance of degradation products. RNA on the other hand recorded a rapid degradation during an initial incubation period of 1 hr. RNA degradation products appeared upto an incubation period of 2 hr. DNA was observed to degrade into oligo- and mononucleotides. pyrimidine nucleosides, purine nucleoside adenosine and bases xanthine, hypoxanthine and thymine. Degradation products of RNA comprised of pyrimidine nucleosides, purine nucleoside, adenosine and bases xanthine, hypoxanthine and uracil besides oligo- and mononucleotides.
Sinha, Anuradha,Dey, Ayan,Saletti, Giulietta,Samanta, Pradip,Chakraborty, Partha Sarathi,Bhattacharya, M. K.,Ghosh, Santanu,Ramamurthy, T.,Kim, Jae-Ouk,Yang, Jae Seung,Kim, Dong Wook,Czerkinsky, Cecil American Society for Microbiology 2016 CLINICAL AND VACCINE IMMUNOLOGY Vol.23 No.7
<P>Developing countries are burdened with Shigella diarrhea. Understanding mucosal immune responses associated with natural Shigella infection is important to identify potential correlates of protection and, as such, to design effective vaccines. We performed a comparative analysis of circulating mucosal plasmablasts producing specific antibodies against highly conserved invasive plasmid antigens (IpaC, IpaD20, and IpaD120) and two recently identified surface protein antigens, pan-Shigella surface protein antigen 1 (PSSP1) and PSSP2, common to all virulent Shigella strains. We examined blood and stool specimens from 37 diarrheal patients admitted to the Infectious Diseases & Beliaghata General Hospital, Kolkata, India. The etiological agent of diarrhea was investigated in stool specimens by microbiological methods and real-time PCR. Gut-homing (alpha(4)beta(+)(7)) antibody secreting cells (ASCs) were isolated from patient blood by means of combined magnetic cell sorting and two-color enzymelinked immunosorbent spot (ELISPOT) assay. Overall, 57% (21 of 37) and 65% (24 of 37) of the patients were positive for Shigella infection by microbiological and real-time PCR assays, respectively. The frequency of alpha(4)beta(+)(7) IgG ASC responders against Ipas was higher than that observed against PSSP1 or PSSP2, regardless of the Shigella serotype isolated from these patients. Thus, alpha(4)beta(+)(7) ASC responses to Ipas may be considered an indirect marker of Shigella infection. The apparent weakness of ASC responses to PSSP1 is consistent with the lack of cross-protection induced by natural Shigella infection. The finding that ASC responses to IpaD develop in patients with recent-onset shigellosis indicates that such responses may not be protective or may wane too rapidly and/or be of insufficient magnitude.</P>