Ice cream is a food commonly consumed during summer season. It is an excellent medium for the gro... more Ice cream is a food commonly consumed during summer season. It is an excellent medium for the growth of many microorganisms and thus, its bacteriological quality has always been crucially important to public health. This study aims to access the bacteriological quality of local made open scoop ice cream sold in different areas of Jalandhar city, Punjab, India. Randomly collected 45 open scoop ice cream samples were collected from street hawkers and studied to determine the colony forming units per gram of the ice cream samples. For aerobic colony counts samples were classified as satisfactory, acceptable and unsatisfactory categories according to PHLS (Public Health Laboratory Services, UK) guidelines. For total coliform counts, BIS guidelines were followed. In aerobic colony counts, all the samples of the nine areas that were selected for the study, showed heavy contamination of bacteria ranging from 0.1×109 CFU/g to 10.2×109 CFU/g. A total of 7 zones out of 9, showed the presence ...
Aim: To know the presence of Escherichia coli on the udder skin of the dairy farm buffaloes in th... more Aim: To know the presence of Escherichia coli on the udder skin of the dairy farm buffaloes in the Phagwara region, Punjab, India. Materials and Methods: A total of 135 swabbed samples were collected randomly from the udder of buffaloes in ten dairy farms over the period of three months from August to October 2011 without concern to their breed with the prior approval of the farm owners. The sterilized cotton swabs were examined by Gram's staining for the morphology of the culture, culture characteristics was confirmed by growth on different media and by preforming the different biochemical tests like Indole production, Voges-Proskauer test, Urease Production, Nitrate Reduction, Methyl red and Presumptive test. Results: Out of 135 samples were examined, 23(17.03%) were positive for E. coli. Most Probable Number (MPN) results confirmed the one possibility of the bacteria from the contaminated water. Conclusion: The results of the present study suggest that E. coli isolates are present on the udder skin of the dairy farm buffaloes in the Phagwara region, pose a serious threat to the animal as well as consumer health. Thus, more hygienic preventive measures are required to inhibit the bacterial growth, so as to improve the health of the animals as well as the wholesomeness of the milk.
Development of multidrug-resistant pattern in the bacterial community is a major threat to the so... more Development of multidrug-resistant pattern in the bacterial community is a major threat to the society. Staphylococcus aureus is perhaps the pathogen of the greatest concern because of its inherent virulence, its ability to cause a diverse array of life-threatening situations and capacity to adapt to different environmental conditions. The aims of this study is to investigate the multidrug-resistant pattern of the coagulase-positive S. aureus isolated from nasal carriage, food, paper currency and wastewater samples. We had also studied the multiple antibiotic resistance index and in vitro production of β-lactamase. The study had found out 130 coagulase-positive S. aureus strains isolated from total of 595 samples such as anterior nares of preschool children (195), hospital nurses (100), drivers (76), food (86), wastewater (3) and paper currency (135) (Indian rupee). The biotypes pattern were as follows; A > D > B > C> UT. Multiple antibiotic resistance (MAR) value clearly defines the multidrug-resistant pattern of the S. aureus among different sources. Statistical analysis (one-way ANOVA) of results obtained indicated that the difference in the antibiotic resistance observed in the 130 bacterial isolates against the 23 different antibiotics used in this study was statically significant (p<0.01).
ABSTRACT The interactions of alkoxyalkanols with the ionic liquid 1-butyl-3-methylimidazolium bro... more ABSTRACT The interactions of alkoxyalkanols with the ionic liquid 1-butyl-3-methylimidazolium bromide [bmim][Br] as a function of temperature were investigated by combination of volumetric and acoustic methods. The density, ρ, and speed of sound, u, of ethylene glycol monomethyl ether, diethylene glycol monomethyl ether, and triethylene glycol monomethyl ether (0.00–1.01 mol·kg−1) in aqueous 1-butyl-3-methylimidazolium bromide solutions ranging from pure water to 0.29 mass% of ionic liquid have been measured at T = (288.15, 298.15 and 308.15) K and atmospheric pressure. The apparent molar volume (Vϕ) and adiabatic compressibility (Kϕ,S) of alkoxyalkanols in aqueous ionic liquid solution were determined at the measured temperatures. The partial molar volume (Vϕ0) and partial molar adiabatic compressibility (Kφ0) of alkoxyalkanols at infinite dilution were evaluated. Transfer volumes (ΔVϕ0) and transfer adiabatic compressibility (ΔKϕ0) at infinite dilution from water to aqueous ionic liquid solution were also calculated. The temperature dependence of the apparent molar volume was used to calculate apparent molar expansivity (ϕE0) and the Hepler’s constant values, (∂2Vϕ0/∂T2). The results were explained on the basis of competing patterns of interactions of co-solvent and the solute.
Densities, q, speed of sound, u for glycine, L-alanine have been measured in aqueous solutions of... more Densities, q, speed of sound, u for glycine, L-alanine have been measured in aqueous solutions of dipotassium hydrogen phosphate (DKHP) ranging from 0.2, 0.4, 0.6 and 0.8 molÁkg À1 at temperatures T = (288.15, 298.15, 308.15 and 318.15) K. The different parameters such as apparent molar volume, limiting apparent molar volume, transfer volume, partial molar expansibility have been derived from density data. Experimental speeds of sound data were used to estimate apparent molar adiabatic compressibility, limiting apparent molar adiabatic compressibility, transfer parameter and hydration number. These parameters have been discussed in the light of ion-ion and ion-solvent interactions.
Thirty patients with mild medial ectropion of the lower lid were treated by Argon green laser. A ... more Thirty patients with mild medial ectropion of the lower lid were treated by Argon green laser. A diamond-shaped area (6 x 4 mm in size) on the medial part of the tarsal conjunctiva of the lower lid was burnt with overlapping spots until white blanching and visible contraction of tissue were seen. The apex of the diamond was kept 4 mm below the punctal opening. After an average follow-up of 6 months, functional success was achieved in 22/30 eyes. Anatomical success in terms of repositioning of the punctum was attained in 24/30 eyes. The only side effect noted was a mild burning sensation of the eyes lasting for two hours after the procedure. This is the authors&amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;#39; initial experience with a somewhat new and easy procedure to treat mild medial ectropion of the lower lid that can be performed on an outpatient basis.
Speeds of sound have been measured in dipropylene glycol monopropyl ether mixtures with methanol,... more Speeds of sound have been measured in dipropylene glycol monopropyl ether mixtures with methanol, 1-propanol, 1-pentanol, and 1-heptanol as a function of composition at 288.15, 298.15, and 308.15 K and atmospheric pressure. Measurements of viscosity at 298.15 K and atmospheric pressure have also been made for the same mixtures over the whole composition range. The speeds of sound were combined with our previous densitity results to obtain the isentropic compressibility κ S. The molar volumes were multiplied by the isentropic compressibilities to obtain estimates of K S,m and its excess counterparts K E S,m. The K E S,m values are negative over the entire range of composition for all mixtures. Deviations in viscosity η from the mixing relation x i ln η i and excess Gibbs energies of activation for viscous flow G * E have been derived for all of these systems. Also, from the speed of sound results, the apparent molar compressibilities K 0 φ,i of the components have been calculated at infinite dilution. The variations of these properties with the composition, temperature and the number of carbon atoms in the alcohol molecule are discussed in terms of molecular interactions. The experimental results have also been discussed on the basis of IR measurements.
ABSTRACT Solution densities (p) and speeds of sound (u) for N-acetyl glycine in (0.05, 0.15, 0.25... more ABSTRACT Solution densities (p) and speeds of sound (u) for N-acetyl glycine in (0.05, 0.15, 0.25 and 0.35) mol kg(-1) aqueous glucose solutions have been measured at temperatures (288.15, 293.15, 298.15, 303.15 and 308.15) K and atmospheric pressure. From these experimental results, the apparent molar volume (V-circle divide), limiting apparent molar volume (V-circle divide(0)) and the slope (S-v), transfer volume (Delta V-circle divide(0)), apparent molar isentropic compression (K-circle divide,K-s), limiting apparent molar isentropic compression (K-circle divide,s(0)) and slope (S-K), and transfer isentropic compression (Delta K-circle divide,s(0)) have been calculated. Partial molar expansibilities (E-circle divide(0)) and Hepler&#39;s constant (a(2)v(circle divide)(0)/aT(2)) have been evaluated from the temperature dependence of the limiting apparent molar volumes. Pair and triplet interaction coefficients have also been calculated from these data. The trends of variation of experimental and computed parameters have been discussed in terms of hydrophilic-hydrophilic group and hydrophilic-hydrophobic group interactions operative in the systems.
In this study, the densities, excess molar volumes and partial molar volumes of four binary syste... more In this study, the densities, excess molar volumes and partial molar volumes of four binary systems containing N,N-dimethyl acetamide (DMAc) with 1-alkanols (1-butanol up to 1-heptanol) are measured at 298.15 K. The results showed both constructive and expansive excess volumetric behavior for studying binary mixtures. Deviation values of heavy alcohol have more positive and less negative excess properties. The excess molar volumes of binary systems consisting of DMAc and 1-alkanols are fitted by the fifth degree of Redlich-Kister equation, and resulting coefficients have been calculated.
t-xcess molar volumes, and viscosities at (298 15, 308.15, and 318 15) K and atmospheric pressure... more t-xcess molar volumes, and viscosities at (298 15, 308.15, and 318 15) K and atmospheric pressure for the binary mixtures of tetraethylene glycol dimethyl ether with methyl acetate, ethyl acetate, and propyl acetate have been measured over the whole mole fraction range From these data, deviations in viscosity, and excess free energies of activation of viscous flow have been calculated. These parameters are used to discuss the molecular interactions between the components of the mixtures Furthermore, activation enthalpies, and entropies of viscous flow have been evaluated and their variation with concentration is discussed. A short comparative study with results for mixtures with esters and polyethers is also presented.
Viscosities at T = (298.15 and 308.15) K and atmospheric pressure for binary liquid mixtures of c... more Viscosities at T = (298.15 and 308.15) K and atmospheric pressure for binary liquid mixtures of cyclopentane with 2-methyl-1-propanol, 3-methyl-1-butanol and 2-methyl-2-butanol over the whole composition range have been measured as a function of composition using an Ubbelohde viscometer. The deviations in viscosity and excess free energy of activation for viscous flow have been calculated from experimental data. The results have been compared with earlier results of n-alkanols. A number of approximations used to obtain deviation in viscosities have been analysed. Further, different correlations were used to correlate the viscosity data.
The volumetric and acoustic methods are used for investigating the interactions of L-serine with ... more The volumetric and acoustic methods are used for investigating the interactions of L-serine with drugs ampicillin (AMP) and amoxicillin (AMX) as a function of temperature. Densities and speeds of sound of L-serine in (0.0009, 0.0018, 0.0028, and 0.0038) mol•kg −1 solutions of ampicillin and amoxicillin have been measured at T = (305.15, 310.15, and 315.15) K and atmospheric pressure. The density and speed of sound data have been used to determine apparent molar volume (V ϕ) and apparent molar adiabatic compressibility (K ϕ,s). The positive values of V ϕ and negative values of K ϕ,s indicate attractive interactions between L-serine and drug molecules. The pair interaction and triplet interaction coefficient for volumetric and acoustic data have also been calculated which suggest pairwise interactions between L-serine and drug molecules. The results have been discussed in terms of various interactions prevailing in aqueous solutions of amino acids and drugs.
Speeds of sound have been measured in dipropylene glycol tert.-butyl ether with methanol, 1-propa... more Speeds of sound have been measured in dipropylene glycol tert.-butyl ether with methanol, 1-propanol, 1-pentanol, and 1-heptanol at 298.15K over the entire composition range using a NUSONIC velocimeter based on sing-around technique. The isentropic compressibility κ S for all mixtures were estimated by combining the densities derived from excess molar volumes and the speeds of sound. The molar volume were multiplied by the isentropic compressibilities to obtain estimates of K S,m. The corresponding quantities K S,m E have also been calculated. The K S,m E values are negative over the entire range of composition for all mixtures with the exception of 1-pentanol which changes sign from negative to positive. The magnitude of K S,m E increases with the number of carbon atoms in the n-alcohol. The deviations u D of the speeds of sound from the values calculated for ideal mixtures have been obtained for all measured mole fractions. The behavior of K S,m E and u D with composition and the ...
Indian Journal of Pathology and Microbiology, 2010
Gangliocytic paragangliomas are rare benign neoplastic lesions of neuroendocrine origin occurring... more Gangliocytic paragangliomas are rare benign neoplastic lesions of neuroendocrine origin occurring primarily in peri-ampullary region. Commonly occurring as small submucosal lesions, presentation as a large polyp with acute ileo-ileal intussusception in a 62-year-old woman is rare and is described in this case report.
Ice cream is a food commonly consumed during summer season. It is an excellent medium for the gro... more Ice cream is a food commonly consumed during summer season. It is an excellent medium for the growth of many microorganisms and thus, its bacteriological quality has always been crucially important to public health. This study aims to access the bacteriological quality of local made open scoop ice cream sold in different areas of Jalandhar city, Punjab, India. Randomly collected 45 open scoop ice cream samples were collected from street hawkers and studied to determine the colony forming units per gram of the ice cream samples. For aerobic colony counts samples were classified as satisfactory, acceptable and unsatisfactory categories according to PHLS (Public Health Laboratory Services, UK) guidelines. For total coliform counts, BIS guidelines were followed. In aerobic colony counts, all the samples of the nine areas that were selected for the study, showed heavy contamination of bacteria ranging from 0.1×109 CFU/g to 10.2×109 CFU/g. A total of 7 zones out of 9, showed the presence ...
Aim: To know the presence of Escherichia coli on the udder skin of the dairy farm buffaloes in th... more Aim: To know the presence of Escherichia coli on the udder skin of the dairy farm buffaloes in the Phagwara region, Punjab, India. Materials and Methods: A total of 135 swabbed samples were collected randomly from the udder of buffaloes in ten dairy farms over the period of three months from August to October 2011 without concern to their breed with the prior approval of the farm owners. The sterilized cotton swabs were examined by Gram's staining for the morphology of the culture, culture characteristics was confirmed by growth on different media and by preforming the different biochemical tests like Indole production, Voges-Proskauer test, Urease Production, Nitrate Reduction, Methyl red and Presumptive test. Results: Out of 135 samples were examined, 23(17.03%) were positive for E. coli. Most Probable Number (MPN) results confirmed the one possibility of the bacteria from the contaminated water. Conclusion: The results of the present study suggest that E. coli isolates are present on the udder skin of the dairy farm buffaloes in the Phagwara region, pose a serious threat to the animal as well as consumer health. Thus, more hygienic preventive measures are required to inhibit the bacterial growth, so as to improve the health of the animals as well as the wholesomeness of the milk.
Development of multidrug-resistant pattern in the bacterial community is a major threat to the so... more Development of multidrug-resistant pattern in the bacterial community is a major threat to the society. Staphylococcus aureus is perhaps the pathogen of the greatest concern because of its inherent virulence, its ability to cause a diverse array of life-threatening situations and capacity to adapt to different environmental conditions. The aims of this study is to investigate the multidrug-resistant pattern of the coagulase-positive S. aureus isolated from nasal carriage, food, paper currency and wastewater samples. We had also studied the multiple antibiotic resistance index and in vitro production of β-lactamase. The study had found out 130 coagulase-positive S. aureus strains isolated from total of 595 samples such as anterior nares of preschool children (195), hospital nurses (100), drivers (76), food (86), wastewater (3) and paper currency (135) (Indian rupee). The biotypes pattern were as follows; A > D > B > C> UT. Multiple antibiotic resistance (MAR) value clearly defines the multidrug-resistant pattern of the S. aureus among different sources. Statistical analysis (one-way ANOVA) of results obtained indicated that the difference in the antibiotic resistance observed in the 130 bacterial isolates against the 23 different antibiotics used in this study was statically significant (p<0.01).
ABSTRACT The interactions of alkoxyalkanols with the ionic liquid 1-butyl-3-methylimidazolium bro... more ABSTRACT The interactions of alkoxyalkanols with the ionic liquid 1-butyl-3-methylimidazolium bromide [bmim][Br] as a function of temperature were investigated by combination of volumetric and acoustic methods. The density, ρ, and speed of sound, u, of ethylene glycol monomethyl ether, diethylene glycol monomethyl ether, and triethylene glycol monomethyl ether (0.00–1.01 mol·kg−1) in aqueous 1-butyl-3-methylimidazolium bromide solutions ranging from pure water to 0.29 mass% of ionic liquid have been measured at T = (288.15, 298.15 and 308.15) K and atmospheric pressure. The apparent molar volume (Vϕ) and adiabatic compressibility (Kϕ,S) of alkoxyalkanols in aqueous ionic liquid solution were determined at the measured temperatures. The partial molar volume (Vϕ0) and partial molar adiabatic compressibility (Kφ0) of alkoxyalkanols at infinite dilution were evaluated. Transfer volumes (ΔVϕ0) and transfer adiabatic compressibility (ΔKϕ0) at infinite dilution from water to aqueous ionic liquid solution were also calculated. The temperature dependence of the apparent molar volume was used to calculate apparent molar expansivity (ϕE0) and the Hepler’s constant values, (∂2Vϕ0/∂T2). The results were explained on the basis of competing patterns of interactions of co-solvent and the solute.
Densities, q, speed of sound, u for glycine, L-alanine have been measured in aqueous solutions of... more Densities, q, speed of sound, u for glycine, L-alanine have been measured in aqueous solutions of dipotassium hydrogen phosphate (DKHP) ranging from 0.2, 0.4, 0.6 and 0.8 molÁkg À1 at temperatures T = (288.15, 298.15, 308.15 and 318.15) K. The different parameters such as apparent molar volume, limiting apparent molar volume, transfer volume, partial molar expansibility have been derived from density data. Experimental speeds of sound data were used to estimate apparent molar adiabatic compressibility, limiting apparent molar adiabatic compressibility, transfer parameter and hydration number. These parameters have been discussed in the light of ion-ion and ion-solvent interactions.
Thirty patients with mild medial ectropion of the lower lid were treated by Argon green laser. A ... more Thirty patients with mild medial ectropion of the lower lid were treated by Argon green laser. A diamond-shaped area (6 x 4 mm in size) on the medial part of the tarsal conjunctiva of the lower lid was burnt with overlapping spots until white blanching and visible contraction of tissue were seen. The apex of the diamond was kept 4 mm below the punctal opening. After an average follow-up of 6 months, functional success was achieved in 22/30 eyes. Anatomical success in terms of repositioning of the punctum was attained in 24/30 eyes. The only side effect noted was a mild burning sensation of the eyes lasting for two hours after the procedure. This is the authors&amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;#39; initial experience with a somewhat new and easy procedure to treat mild medial ectropion of the lower lid that can be performed on an outpatient basis.
Speeds of sound have been measured in dipropylene glycol monopropyl ether mixtures with methanol,... more Speeds of sound have been measured in dipropylene glycol monopropyl ether mixtures with methanol, 1-propanol, 1-pentanol, and 1-heptanol as a function of composition at 288.15, 298.15, and 308.15 K and atmospheric pressure. Measurements of viscosity at 298.15 K and atmospheric pressure have also been made for the same mixtures over the whole composition range. The speeds of sound were combined with our previous densitity results to obtain the isentropic compressibility κ S. The molar volumes were multiplied by the isentropic compressibilities to obtain estimates of K S,m and its excess counterparts K E S,m. The K E S,m values are negative over the entire range of composition for all mixtures. Deviations in viscosity η from the mixing relation x i ln η i and excess Gibbs energies of activation for viscous flow G * E have been derived for all of these systems. Also, from the speed of sound results, the apparent molar compressibilities K 0 φ,i of the components have been calculated at infinite dilution. The variations of these properties with the composition, temperature and the number of carbon atoms in the alcohol molecule are discussed in terms of molecular interactions. The experimental results have also been discussed on the basis of IR measurements.
ABSTRACT Solution densities (p) and speeds of sound (u) for N-acetyl glycine in (0.05, 0.15, 0.25... more ABSTRACT Solution densities (p) and speeds of sound (u) for N-acetyl glycine in (0.05, 0.15, 0.25 and 0.35) mol kg(-1) aqueous glucose solutions have been measured at temperatures (288.15, 293.15, 298.15, 303.15 and 308.15) K and atmospheric pressure. From these experimental results, the apparent molar volume (V-circle divide), limiting apparent molar volume (V-circle divide(0)) and the slope (S-v), transfer volume (Delta V-circle divide(0)), apparent molar isentropic compression (K-circle divide,K-s), limiting apparent molar isentropic compression (K-circle divide,s(0)) and slope (S-K), and transfer isentropic compression (Delta K-circle divide,s(0)) have been calculated. Partial molar expansibilities (E-circle divide(0)) and Hepler&#39;s constant (a(2)v(circle divide)(0)/aT(2)) have been evaluated from the temperature dependence of the limiting apparent molar volumes. Pair and triplet interaction coefficients have also been calculated from these data. The trends of variation of experimental and computed parameters have been discussed in terms of hydrophilic-hydrophilic group and hydrophilic-hydrophobic group interactions operative in the systems.
In this study, the densities, excess molar volumes and partial molar volumes of four binary syste... more In this study, the densities, excess molar volumes and partial molar volumes of four binary systems containing N,N-dimethyl acetamide (DMAc) with 1-alkanols (1-butanol up to 1-heptanol) are measured at 298.15 K. The results showed both constructive and expansive excess volumetric behavior for studying binary mixtures. Deviation values of heavy alcohol have more positive and less negative excess properties. The excess molar volumes of binary systems consisting of DMAc and 1-alkanols are fitted by the fifth degree of Redlich-Kister equation, and resulting coefficients have been calculated.
t-xcess molar volumes, and viscosities at (298 15, 308.15, and 318 15) K and atmospheric pressure... more t-xcess molar volumes, and viscosities at (298 15, 308.15, and 318 15) K and atmospheric pressure for the binary mixtures of tetraethylene glycol dimethyl ether with methyl acetate, ethyl acetate, and propyl acetate have been measured over the whole mole fraction range From these data, deviations in viscosity, and excess free energies of activation of viscous flow have been calculated. These parameters are used to discuss the molecular interactions between the components of the mixtures Furthermore, activation enthalpies, and entropies of viscous flow have been evaluated and their variation with concentration is discussed. A short comparative study with results for mixtures with esters and polyethers is also presented.
Viscosities at T = (298.15 and 308.15) K and atmospheric pressure for binary liquid mixtures of c... more Viscosities at T = (298.15 and 308.15) K and atmospheric pressure for binary liquid mixtures of cyclopentane with 2-methyl-1-propanol, 3-methyl-1-butanol and 2-methyl-2-butanol over the whole composition range have been measured as a function of composition using an Ubbelohde viscometer. The deviations in viscosity and excess free energy of activation for viscous flow have been calculated from experimental data. The results have been compared with earlier results of n-alkanols. A number of approximations used to obtain deviation in viscosities have been analysed. Further, different correlations were used to correlate the viscosity data.
The volumetric and acoustic methods are used for investigating the interactions of L-serine with ... more The volumetric and acoustic methods are used for investigating the interactions of L-serine with drugs ampicillin (AMP) and amoxicillin (AMX) as a function of temperature. Densities and speeds of sound of L-serine in (0.0009, 0.0018, 0.0028, and 0.0038) mol•kg −1 solutions of ampicillin and amoxicillin have been measured at T = (305.15, 310.15, and 315.15) K and atmospheric pressure. The density and speed of sound data have been used to determine apparent molar volume (V ϕ) and apparent molar adiabatic compressibility (K ϕ,s). The positive values of V ϕ and negative values of K ϕ,s indicate attractive interactions between L-serine and drug molecules. The pair interaction and triplet interaction coefficient for volumetric and acoustic data have also been calculated which suggest pairwise interactions between L-serine and drug molecules. The results have been discussed in terms of various interactions prevailing in aqueous solutions of amino acids and drugs.
Speeds of sound have been measured in dipropylene glycol tert.-butyl ether with methanol, 1-propa... more Speeds of sound have been measured in dipropylene glycol tert.-butyl ether with methanol, 1-propanol, 1-pentanol, and 1-heptanol at 298.15K over the entire composition range using a NUSONIC velocimeter based on sing-around technique. The isentropic compressibility κ S for all mixtures were estimated by combining the densities derived from excess molar volumes and the speeds of sound. The molar volume were multiplied by the isentropic compressibilities to obtain estimates of K S,m. The corresponding quantities K S,m E have also been calculated. The K S,m E values are negative over the entire range of composition for all mixtures with the exception of 1-pentanol which changes sign from negative to positive. The magnitude of K S,m E increases with the number of carbon atoms in the n-alcohol. The deviations u D of the speeds of sound from the values calculated for ideal mixtures have been obtained for all measured mole fractions. The behavior of K S,m E and u D with composition and the ...
Indian Journal of Pathology and Microbiology, 2010
Gangliocytic paragangliomas are rare benign neoplastic lesions of neuroendocrine origin occurring... more Gangliocytic paragangliomas are rare benign neoplastic lesions of neuroendocrine origin occurring primarily in peri-ampullary region. Commonly occurring as small submucosal lesions, presentation as a large polyp with acute ileo-ileal intussusception in a 62-year-old woman is rare and is described in this case report.
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