OALib Journal期刊

ISSN: 2333-9721




2019 ( 45 )

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匹配条件: “Indumathy R” ,找到相关结果约223600条。
Antibacterial activity of plants used in Indian herbal medicine
Pavithra P,Janani V,Charumathi K,Indumathy R
International Journal of Green Pharmacy , 2010,
Abstract: Delonix elata , Enicostemma axillare, Merremia tridentata, Mollugo cerviana and Solanum incanum are medicinal plants used in traditional Indian medicine for the treatment of various ailments. These plants were selected to evaluate their potential antibacterial activity. To determine antibacterial activity and phytochemicals in the crude extracts of five medicinal plants used in traditional Indian medicine for the treatment of various ailments like rheumatism, piles fever, skin diseases and snake bite. The antibacterial activity of organic solvent extracts of these plants were determined by disc diffusion and broth dilution techniques against gram-positive bacterial strains (Bacillus subtilis, Staphylococcus aureus) and gram-negative bacterial strains (Escherichia coli, Klebsiella pneumoniae, Pseudomonas aeruginosa). Results revealed that the chloroform and methanol extracts of D. elata and methanol extracts of M. cerviana exhibited significant antibacterial activity against gram-positive and gram-negative strains with minimum bactericidal concentration (MBC) ranging from 1.5 to 100 mg/ml. Methanol extracts of M. tridentata exhibited activity only against gram-positive bacterial strains with MBC ranging from 12.5 to 100 mg/ml. Extracts of E. axillare and S. incanum showed activity only against B. subtilis and were not bactericidal at 100 mg/ml. The most susceptible organism to the organic extracts from all the studied plants was B. subtilis and the most resistant organism was P. aeruginosa. The presence of phytochemicals such as alkaloids, tannins, triterpenoids, steroids and glycosides in the extracts of these plants supports their traditional uses as medicinal plants for the treatment of various ailments. The present study reveals potential use of these plants for developing new antibacterial compounds against pathogenic microorganisms.
Indumathy S*,Kavimani S
Pharmacie Globale : International Journal of Comprehensive Pharmacy , 2011,
Abstract: The angiotensin antagonists like Losartan, Irbesartan and Valsartan were evaluated for its action on inflammation using plethysmograph method i.e. carageenin induced paw edema model. It was reported that angiotensin II generated from plasma had various effects including inflammation. It stimulates the release of pro inflammatory cytokines, activates Nuclear factor kappa B (NF –kB), increases oxidant stress, suppress nitric oxide synthesis and behave as an inflammatory molecule. It also induces inflammation through the production of reactive oxygen species, adhesion molecules, and inflammatory cytokines such as chemo attractant protein-1(MCP-1).our study showed that the tested drugs of angiotensin antagonists at a dose of 10mg/Kg possessed significant anti inflammatory activity. The result was very comparable with standard drug Diclofenac sodium at a dose of 20mg/kg.
Bifunctional Role of Thiosalicylic Acid in the Synthesis of Silver Nanoparticles  [PDF]
Ramasamy Indumathy, Kalarical Janardhanan Sreeram, Muralidharan Sriranjani, Cheravathoor Poulose Aby, Balachandran Unni Nair
Materials Sciences and Applications (MSA) , 2010, DOI: 10.4236/msa.2010.15040
Abstract: Conventional synthesis of silver nanoparticles employs a reducing agent and a capping agent. Surfactants are effec-tive capping agents as they prevent the aggregation of nanoparticles during storage and use. However, the biocompatibility of several of the surfactants is questionable. In this report, the use of thiosalicylic acid as both reducing and capping agent is reported. Compared to conventional synthesis, this methodology requires higher temperature for synthesis, which then is expected to result in aggregates of larger size. The ability of three different synthesis methodologies – direct heating, photochemical and microwave dielectric treatment were evaluated and assessed on the basis of the size, size distribution and stability of the particles. Microwave irradiation was found to be most suitable for achieving particles with a hydrodynamic diameter of 10 nm. Our studies indicate that -COO- group is involved in the reduction of Ag+ and –SH group of TSA is involved in the capping of the nanoparticles.
GAP between knowledge and skills for the implementation of the ACCM/PALS septic shock guidelines in India: Is the bridge too far?
Santhanam Indumathy,Kissoon Niranjan,Kamath S,Ranjit Suchitra
Indian Journal of Critical Care Medicine , 2009,
Abstract: Objective: To determine whether physicians were aware of and had the skills to implement the American College of Critical Care Medicine/Pediatric Advanced Life Support Course septic shock protocol. Design: A cross-sectional questionnaire survey. Setting: Four academic institutions in Chennai, Manipal, Mangalore, and Trivandrum - cities representing the three southern states of Tamil Nadu, Karnataka, and Kerala, respectively, between February and April 2006. Interventions: Pre and post lecture questions. They were evaluated using 11 questions testing knowledge and 10 questions testing their comfort level in performing interventions related to the initial resuscitation in septic shock. Measurement and Main Result: The ACCM/PALS sepsis guidelines were taught during the PALS course conducted in the four academic institutions. A total of 118 delegates participated, of whom 114 (97%) were pediatricians and four (3%) were anaesthetists. The overall mean number of correct responses for the 11 questions testing knowledge before and after the lecture was 2.1 and 4.07, respectively P=0.001(paired t test). Although, 42% of the respondents (n=50) were aware of the ACCM guidelines, 88% (n=104) did not adhere to it in their practice. A total of 86% (n=101) and 66% (n=78) did not feel comfortable titrating inotropes or intubating in the ED; 78% (n=92) and 67% (n=78), respectively felt that central venous access (CVA) and arterial pressure (AP) monitoring were unimportant in the management of fluid refractory shock. Of the physicians, 20% (n=24) had never intubated a patient, 78% (n=92) had not introduced a central venous catheter, and 76% (n=90) had never introduced an intra-arterial catheter. Conclusions: In view of the lack of skills and suboptimal knowledge, the ACCM/PALS sepsis guidelines may be inappropriate in its current format in the Indian setting. More emphasis needs to be placed on educating community pediatricians with a simpler clinical protocol, which has the potential to save many more children.
Anthelminthic activity of Asta Churna
K Devi, S Indumathy, V Rathinambal, S Uma, S Kavimani, V Balu
International Journal of Health Research , 2009,
Abstract: Purpose: To determine the effect of Asta churna (an ayurvedic preparation of Impcops) on Indian earthworms. Methods: Asta churna (2.5 mg/mL and 5 mg/mL) were investigated for activity in Indian earthworms (Pheretima postuma) against piperazine citrate (15 mg/mL) and albendazole (20 mg/mL) as standard references and normal saline as control. The time to achieve paralysis of the worms was determined. Results: The two concentrations of Asta churna exhibited significant anthelminthic activity (p < 0.001) when compared with the piperazine citrate, albendazole and normal saline. Conclusion: Asta chuma has paralytic effect on Indian earthworms.
Power Aware Routing Protocol (PARP) for Wireless Sensor Networks  [PDF]
R. Prema, R. Rangarajan
Wireless Sensor Network (WSN) , 2012, DOI: 10.4236/wsn.2012.45019
Abstract: Several wireless sensor network applications ought to decide the intrinsic variance between energy efficient communication and the requirement to attain preferred quality of service (QoS) such as packet delivery ratio, delay and to reduce the power consumption of wireless sensor nodes. In order to address this challenge, we propose the Power Aware Routing Protocol (PARP), which attains application-specified communication delays at low energy cost by dynamically adapting transmission power and routing decisions. Extensive simulation results prove that the proposed PARP attains better QoS and reduced power consumption.
Studies on Dissolution Behaviour of Nanoparticulate Curcumin Formulation  [PDF]
R. Ravichandran
Advances in Nanoparticles (ANP) , 2013, DOI: 10.4236/anp.2013.21010

Curcumin is the main biologically active phytochemical compound of turmeric that has been widely used by ancient cultures throughout Asia. However the dissolution rate limited absorption and pre-absorption degradation limits its use as a potential therapeutic. In this study an attempt has been made to overcome the above limitations by curcumin delivery through nanotechnology. Nanocurcumin solid dosage formulations were prepared and studied for its dissolution behaviour. Considerable improvement in the dissolution behavior was observed in the drug nanocrystal-loaded solid dosage forms. This is expected to enhance the bioavailability of poorly soluble medicinal herbs such as turmeric in the body.

Pharmacokinetic Study of Nanoparticulate Curcumin: Oral Formulation for Enhanced Bioavailability  [PDF]
R. Ravichandran
Journal of Biomaterials and Nanobiotechnology (JBNB) , 2013, DOI: 10.4236/jbnb.2013.43037

Curcumin, a bioactive component of turmeric, which is a commonly used spice and nutritional supplement, is isolated from the rhizomes of Curcuma longa Linn. (Zingiberaceae). In recent years, the potential pharmacological actions of Curcumin in inflammatory disorders, cardiovascular disease, cancer, Alzheimer’s disease and neurological disorders have been shown. However, the clinical application of Curcumin is severely limited by its main drawbacks such as instability, low solubility, poor bioavailability and rapid metabolism. Multifarious nanotechnology-based drug delivery systems for Curcumin including liposomes, polymeric nanoparticles, solid lipid nanoparticles, micelles, nanogels, nanoemulsions, complexes and dendrimer/dimer, have been attempted to enhance the oral bioavailability, biological activity or tissue-targeting ability of Curcumin. We attempted the nanosuspensions based delivery of curcumin. Nanonisation renders curcumin completely dispersible in aqueous media. To enhance the curcumin absorption by oral administration, nanoparticulate solid oral formulation of curcumin was prepared by us and the resulting capsule was then examined for its efficiency on bioavailability in Male Wistar rats at a dose of 100 mg curcumin/kg body weight and the pharmacokinetic parameters were compared to those of normal curcumin powder and a commercial curcumin capsule CUR-500. The bio-distribution of curcumin in organs of rat was also studied. Nanoparticulation significantly raised the curcumin concentration in selective organs in the body. The results obtained provide promising results for nanoparticulate Curcumin to improve its biological activities. Enhanced bioavailability of curcumin in the form of nanoparticle is likely to bring this promising natural product to the forefront of therapeutic agents for treatment of human disease. The available information also strongly suggests that nano-formulation of ingredients such as curcumin may be used as a novel nutrient delivery system too.

The Arithmetic Mean Standard Deviation Distribution: A Geometrical Framework  [PDF]
R. Caimmi
Applied Mathematics (AM) , 2013, DOI: 10.4236/am.2013.411A4001

The current attempt is aimed to outline the geometrical framework of a well known statistical problem, concerning the explicit expression of the arithmetic mean standard deviation distribution. To this respect, after a short exposition, three steps are performed as 1) formulation of the arithmetic mean standard deviation, \"\", as a function of the errors, \"\", which, by themselves, are statistically independent; 2) formulation of the arithmetic mean standard deviation distribution, \"\", as a function of the errors, \"\"; 3) formulation of the arithmetic mean standard deviation distribution, \"\", as a function of the arithmetic mean standard deviation, \"\", and the arithmetic mean rms error, \"\". The integration domain can be expressed in canonical form after a change of reference frame in the n-space, which is recognized as an infinitely thin n-cylindrical corona where the symmetry axis coincides with a coordinate axis. Finally, the solution is presented and a number of (well known) related parameters are inferred for sake of completeness.

Optimized Parameter Combinations of Hydraulic Damper Modules  [PDF]
R. Sonnenburg
Journal of Transportation Technologies (JTTs) , 2014, DOI: 10.4236/jtts.2014.43025

This paper is devoted to the problem of finding optimized parameter combinations of automotive damper modules. Different cost functions using the amplitude spectrum of the excitation and the frequency response function of the car model will be investigated and it is shown that for three different arbitrary road excitations there exists a parameter combination of top mount stiffness, piston rod mass and damping constant that provides an optimum for the dynamic wheel load fluctuation. The achieved advantage of the optimized damper module regarding the dynamic wheel load fluctuation compared to a simple damper in a two mass vibration system can reach up to 20 percent.


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