Shear Strength of Sand Under General Stress System (9999)
Consolidated-drained shear tests conducted in the modified Universal Triaxial Apparatus on dense cubical specimens of an Ottawa sand with b, i.e. (Sigma sub 2 Prime-Sigma sub 3 Prime)/(Sigma sub 1...
Variational Method for Slope Stability Analysis (9999)
Ramamurthy,T., Narayan,C. G., Bhatkar,V. P.
Application of variational technique for the rigorous analysis of slopes is described. This paper concerns the direct method (Raleigh-Ritz technique) in the calculus of variations. The stability...
Prediction of the Behaviour of Rockfill Materials (9999)
Theoretical justification supported by experimental evidence from the published literature is presented for evaluating the properties of prototype rockfill material by testing the modelled material...
Slope Stability Coefficients by Variational Method (9999)
Narayan,C. G. P., Bhatkar,V. P., Ramamurthy,T.
Using calculus of variations, a rigorous mathematical technique is developed for analysing the stability of slopes in terms of effective stress. The stability equations are obtained based on limiting...
Strength of Rock-Like Materials (9999)
A study was carried out on 5 different types of rock-like material (cement-sand mortar) prepared by varying the cement-sand ratio. Tests were conducted on each mix in oblique shear, triaxial...
Behaviour of Anisotropic Sand in Compression (9999)
Drained shear tests were conducted on 7.6 cm cubical specimens of Ottawa sand in the modified Universal Triaxial Apparatus. Specimens were prepared by freely depositing saturated sand under water and...
Engineering Characteristics of Stabilized Soil (9999)
Nag,C. P., Ramamurthy,T., Rao,G. V.
The influence of cement content, compactive effort and shape and size of specimen on strength, modulus of elasticity and Poisson's ratio of soil-cement specimens tested under unconfined compression...
Shear Behaviour of Sand Under Generalised Conditions of Stress and Strain (9999)
Consolidated-drained tests have been conducted in (Universal Triaxial Apparatus) UTA to study the strength and deformation characteristics of dense, medium and loose specimens of Ottawa sand and...
Anisotropic strength and deformational behavior of Himalayan schists (2002)
Nasseri, M H B, Rao, K S, Ramamurthy, T
Anisotropy, which is characteristic of metamorphic rocks such as schists, is due to a process of metamorphic differentiation. Preferred orientation of minerals like mica and chlorite in response to...
Shear strength response of some geological materials in triaxial compression (2001)
The shear strength of geological materials, like soils and rocks, is often represented either by Coulomb or Mohr–Coulomb theory. It is assumed to vary linearly with the applied stress through two...
Behrestaghi, M H N, Rao, K. Seshagiri, Ramamurthy, T
For a rational and safer design of civil and mining engineering structures in or on rocks, a proper understanding of the quality of rock mass is required. To assess the rock mass quality, evaluation...
Strength predictions for jointed rocks in confined and unconfined states (1994)
Most of the rational approaches to the design of structures on or in a rock mass are based on the strength response of the rock mass. Realizing this important aspect, the present investigation was...
Bag, Prasanta K., Nandi, Suvobroto, Bhadra, Rupak K., Ramamurthy, T., Bhattacharya, S. K., Nishibuchi, M., ...
The genomes of the O3:K6 strains of Vibrio parahaemolyticus which abruptly emerged in Calcutta, India, in February 1996 and which demonstrated an unusual potential to spread and an enhanced...
Garg, Pallavi, Nandy, Ranjan K., Chaudhury, Papiya, Chowdhury, Nandini Roy, De, Keya, Ramamurthy, T., ...
The toxigenic Inaba serotype of Vibrio cholerae O1 biotype El Tor reappeared in India in 1998 and 1999, almost 10 years after its last dominance in Calcutta in 1989. Extensive molecular...
Chakraborty, Subhra, Deokule, J. S., Garg, Pallavi, Bhattacharya, S. K., Nandy, R. K., Nair, G. Balakrish, ...
In Ahmedabad, a major city in the state of Gujarat, India, an outbreak of acute secretory diarrhea caused by Vibrio cholerae O1 Ogawa El Tor, V. cholerae O139, and multiple serotypes of...
Garg, Pallavi, Sinha, Sutapa, Chakraborty, Rupa, Bhattacharya, S. K., Nair, G. Balakrish, Ramamurthy, T., ...
Sharma, Charu, Thungapathra, M., Ghosh, A., Mukhopadhyay, Asish K., Basu, Arnab, Mitra, Rupak, ...
There was an inexplicable upsurge in the incidence of non-O1, non-O139 Vibrio cholerae among hospitalized patients admitted to the Infectious Diseases Hospital, Calcutta, India, between February and...
Escalating Association of Vibrio cholerae O139 with Cholera Outbreaks in India
Sinha, Sutapa, Chakraborty, Rupa, De, Keya, Khan, Asis, Datta, Simanti, Ramamurthy, T., ...
Between December 1999 and December 2000, teams from the National Institute of Cholera and Enteric Diseases, Calcutta, India, examined eight outbreaks of cholera, which occurred in different parts of...
Baranwal, Somesh, Dey, Keya, Ramamurthy, T., Nair, G. Balakrish, Kundu, Manikuntala
Quinolones are among the drugs of choice in the management of cholera caused by Vibrio cholerae. In this study, we demonstrate that, in addition to mutations detected in the target genes gyrA and...
Khan, Asis, Das, S. C., Ramamurthy, T., Sikdar, A., Khanam, J., Yamasaki, S., ...
Antibiotic resistance, virulence gene, and molecular profiles of Shiga toxin-producing Escherichia coli (STEC) non-O157 strains isolated from human stool samples, cow stool samples, and beef samples...
Pal, A, Ramamurthy, T, Bhadra, R K, Takeda, T, Shimada, T, Takeda, Y, ...
A collection of 521 environmental isolates of Vibrio cholerae which were previously examined by the suckling mouse assay and found to be negative for the heat-stable enterotoxin NAG-ST were...
Evaluation of DNA probes for specific detection of Vibrio cholerae O139 Bengal.
Nair, G B, Bag, P K, Shimada, T, Ramamurthy, T, Takeda, T, Yamamoto, S, ...
Two DNA probes, 2R1 and 2R3, prepared from a region in the chromosome specific for the lipopolysaccharide O side chains of Vibrio cholerae O139 (M.K. Waldor and J.J. Mekalanos, Lancet 343:1366, 1994)...
Yoshino, K, Ramamurthy, T, Nair, G B, Fukushima, H, Ohtomo, Y, Takeda, N, ...
Yersinia pseudotuberculosis is known to produce a novel superantigen designated Y. pseudotuberculosis-derived mitogen. In the present study, we demonstrated that there was a distinct geographical...
Pandey, Mritunjay, Khan, Asis, Das, Suresh C., Sarkar, Bhaswati, Kahali, Soumen, Chakraborty, Subhra, ...
Among Escherichia coli strains isolated from stool specimens from patients with acute diarrhea, 1.4% were found to harbor cdtB by use of enrichment cytolethal distending toxin (CDT) PCR. These...
Ramamurthy, T, Pal, A, Pal, S C, Nair, G B
Of the 110 consecutive isolates of Vibrio cholerae recovered from cholera patients admitted to the Infectious Diseases Hospital, Calcutta, India, between July 1989 and October 1990, 90 and 82.7% were...
Ramamurthy, T, Bhattacharya, S K, Uesaka, Y, Horigome, K, Paul, M, Sen, D, ...
A highly sensitive bead enzyme-linked immunosorbent assay (bead ELISA) for detection of cholera toxin (CT) was evaluated for direct detection of CT from stool specimens of patients with acute...
Ramamurthy, T, Pal, A, Bag, P K, Bhattacharya, S K, Nair, G B, Kurozano, H, ...
Stool specimens obtained from 123 hospitalized patients with acute secretory diarrhea admitted to the Infectious Diseases Hospital, Calcutta, India, were examined for isolation of Vibrio cholerae O1...
Polymerase chain reaction for detection of the cholera enterotoxin operon of Vibrio cholerae.
Shirai, H, Nishibuchi, M, Ramamurthy, T, Bhattacharya, S K, Pal, S C, Takeda, Y
We report a set of oligonucleotide primers and amplification conditions for the polymerase chain reaction to detect the ctx operon of Vibrio cholerae. The results of this assay on strains of V....
Chattopadhyay, Santanu, Patra, Rajashree, Ramamurthy, T., Chowdhury, Abhijit, Santra, Amal, Dhali, G. K., ...
We developed and evaluated a simple, novel multiplex PCR assay for rapid detection of Helicobacter pylori infection and for the determination of vacA and cagA genotypes directly from gastric biopsy...
Kahali, Soumen, Sarkar, Bhaswati, Rajendran, K., Khanam, Jasmina, Yamasaki, Shinji, Nandy, Ranjan K., ...
Enteroaggregative Escherichia coli (EAEC) is an important diarrheal enteropathogen defined by aggregative adherence to cultured epithelial cells. We have detected EAEC from 121 (6.6%) of 1,826...
Srinivasan, Vijaya Bharathi, Virk, Rupinder Kaur, Kaundal, Amita, Chakraborty, Rupa, Datta, Basabjit, Ramamurthy, T., ...
The molecular mechanisms of drug resistance in 19 strains of Vibrio fluvialis isolated from 1998 to 2002 in Kolkata, India, were investigated. Class 1 integrons were detected in eight strains, and...
Bag, Prasanta K., Nandi, Suvobroto, Bhadra, Rupak K., Ramamurthy, T., Bhattacharya, S. K., Nishibuchi, M., ...
The genomes of the O3:K6 strains of Vibrio parahaemolyticus which abruptly emerged in Calcutta, India, in February 1996 and which demonstrated an unusual potential to spread and an enhanced...
Garg, Pallavi, Nandy, Ranjan K., Chaudhury, Papiya, Chowdhury, Nandini Roy, De, Keya, Ramamurthy, T., ...
The toxigenic Inaba serotype of Vibrio cholerae O1 biotype El Tor reappeared in India in 1998 and 1999, almost 10 years after its last dominance in Calcutta in 1989. Extensive molecular...
Chakraborty, Subhra, Deokule, J. S., Garg, Pallavi, Bhattacharya, S. K., Nandy, R. K., Nair, G. Balakrish, ...
In Ahmedabad, a major city in the state of Gujarat, India, an outbreak of acute secretory diarrhea caused by Vibrio cholerae O1 Ogawa El Tor, V. cholerae O139, and multiple serotypes of...
Garg, Pallavi, Sinha, Sutapa, Chakraborty, Rupa, Bhattacharya, S. K., Nair, G. Balakrish, Ramamurthy, T., ...
Sharma, Charu, Thungapathra, M., Ghosh, A., Mukhopadhyay, Asish K., Basu, Arnab, Mitra, Rupak, ...
There was an inexplicable upsurge in the incidence of non-O1, non-O139 Vibrio cholerae among hospitalized patients admitted to the Infectious Diseases Hospital, Calcutta, India, between February and...
Escalating Association of Vibrio cholerae O139 with Cholera Outbreaks in India
Sinha, Sutapa, Chakraborty, Rupa, De, Keya, Khan, Asis, Datta, Simanti, Ramamurthy, T., ...
Between December 1999 and December 2000, teams from the National Institute of Cholera and Enteric Diseases, Calcutta, India, examined eight outbreaks of cholera, which occurred in different parts of...
Baranwal, Somesh, Dey, Keya, Ramamurthy, T., Nair, G. Balakrish, Kundu, Manikuntala
Quinolones are among the drugs of choice in the management of cholera caused by Vibrio cholerae. In this study, we demonstrate that, in addition to mutations detected in the target genes gyrA and...
Khan, Asis, Das, S. C., Ramamurthy, T., Sikdar, A., Khanam, J., Yamasaki, S., ...
Antibiotic resistance, virulence gene, and molecular profiles of Shiga toxin-producing Escherichia coli (STEC) non-O157 strains isolated from human stool samples, cow stool samples, and beef samples...
Pal, A, Ramamurthy, T, Bhadra, R K, Takeda, T, Shimada, T, Takeda, Y, ...
A collection of 521 environmental isolates of Vibrio cholerae which were previously examined by the suckling mouse assay and found to be negative for the heat-stable enterotoxin NAG-ST were...
Evaluation of DNA probes for specific detection of Vibrio cholerae O139 Bengal.
Nair, G B, Bag, P K, Shimada, T, Ramamurthy, T, Takeda, T, Yamamoto, S, ...
Two DNA probes, 2R1 and 2R3, prepared from a region in the chromosome specific for the lipopolysaccharide O side chains of Vibrio cholerae O139 (M.K. Waldor and J.J. Mekalanos, Lancet 343:1366, 1994)...
Yoshino, K, Ramamurthy, T, Nair, G B, Fukushima, H, Ohtomo, Y, Takeda, N, ...
Yersinia pseudotuberculosis is known to produce a novel superantigen designated Y. pseudotuberculosis-derived mitogen. In the present study, we demonstrated that there was a distinct geographical...
Pandey, Mritunjay, Khan, Asis, Das, Suresh C., Sarkar, Bhaswati, Kahali, Soumen, Chakraborty, Subhra, ...
Among Escherichia coli strains isolated from stool specimens from patients with acute diarrhea, 1.4% were found to harbor cdtB by use of enrichment cytolethal distending toxin (CDT) PCR. These...
Ramamurthy, T, Pal, A, Pal, S C, Nair, G B
Of the 110 consecutive isolates of Vibrio cholerae recovered from cholera patients admitted to the Infectious Diseases Hospital, Calcutta, India, between July 1989 and October 1990, 90 and 82.7% were...
Ramamurthy, T, Bhattacharya, S K, Uesaka, Y, Horigome, K, Paul, M, Sen, D, ...
A highly sensitive bead enzyme-linked immunosorbent assay (bead ELISA) for detection of cholera toxin (CT) was evaluated for direct detection of CT from stool specimens of patients with acute...
Ramamurthy, T, Pal, A, Bag, P K, Bhattacharya, S K, Nair, G B, Kurozano, H, ...
Stool specimens obtained from 123 hospitalized patients with acute secretory diarrhea admitted to the Infectious Diseases Hospital, Calcutta, India, were examined for isolation of Vibrio cholerae O1...
Polymerase chain reaction for detection of the cholera enterotoxin operon of Vibrio cholerae.
Shirai, H, Nishibuchi, M, Ramamurthy, T, Bhattacharya, S K, Pal, S C, Takeda, Y
We report a set of oligonucleotide primers and amplification conditions for the polymerase chain reaction to detect the ctx operon of Vibrio cholerae. The results of this assay on strains of V....
Chattopadhyay, Santanu, Patra, Rajashree, Ramamurthy, T., Chowdhury, Abhijit, Santra, Amal, Dhali, G. K., ...
We developed and evaluated a simple, novel multiplex PCR assay for rapid detection of Helicobacter pylori infection and for the determination of vacA and cagA genotypes directly from gastric biopsy...
Kahali, Soumen, Sarkar, Bhaswati, Rajendran, K., Khanam, Jasmina, Yamasaki, Shinji, Nandy, Ranjan K., ...
Enteroaggregative Escherichia coli (EAEC) is an important diarrheal enteropathogen defined by aggregative adherence to cultured epithelial cells. We have detected EAEC from 121 (6.6%) of 1,826...
Srinivasan, Vijaya Bharathi, Virk, Rupinder Kaur, Kaundal, Amita, Chakraborty, Rupa, Datta, Basabjit, Ramamurthy, T., ...
The molecular mechanisms of drug resistance in 19 strains of Vibrio fluvialis isolated from 1998 to 2002 in Kolkata, India, were investigated. Class 1 integrons were detected in eight strains, and...
Spread of Cholera with Newer Clones of Vibrio cholerae O1 El Tor, Serotype Inaba, in India
Dutta, B., Ghosh, R., Sharma, N. C., Pazhani, G. P., Taneja, N., Raychowdhuri, A., ...
During 2004 and 2005, cholera was recorded in 15 states of India, with 7 outbreaks. The newly emerged Vibrio cholerae O1 Inaba had a different antibiogram and ribotype, different pulsotypes, and...
Hajra, Tapas K., Bag, Prasanta K., Das, Suresh C., Mukherjee, Souryadeep, Khan, Asis, Ramamurthy, T.
Rabbit antiserum raised against the whole-cell antigen of Shiga toxin-producing Escherichia coli (STEC) strain VT3 (stx1+ stx2+ eae+) was repeatedly adsorbed with heat-killed cells of different...
PCR-Based Identification of Common Colonization Factor Antigens of Enterotoxigenic Escherichia coli▿
Ghosal, Abhisek, Bhowmick, Rudra, Nandy, Ranjan Kumar, Ramamurthy, T., Chatterjee, Nabendu Sekhar
Colonization factor antigens (CFAs) of enterotoxigenic Escherichia coli (ETEC) have been classified into several groups based on their distinct antigenicity. We describe here a PCR-based method to...
Asakura, Masahiro, Hinenoya, Atsushi, Alam, Mohammad S., Shima, Kensuke, Zahid, Shamim Hasan, Shi, Lei, ...
Cytolethal distending toxins (CDTs) are inhibitory cyclomodulins, which block eukaryotic cell proliferation and are produced by a diverse group of Gram-negative bacteria, including Escherichia coli...