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Anusha, K.
- Ethno-Medico-Botanical Studies and Antibacterial Activity of Some Indigenous Ethno-Medicinal Plants Alleged to Cure Scabies in Irulars in Western Ghats, South India
Authors
1 Department of Biotechnology, Prathyusha Institute of Technology and Management, Aranvoyal Kuppam, Tiruvallur – 602 025, Tamil Nadu, IN
Source
Biometrics and Bioinformatics, Vol 4, No 3 (2012), Pagination: 112-118Abstract
The study area, Siruvani Hills, in Coimbatore district is a continuous range of the Western Ghats mountains included in the Nilgiri Biosphere Reserve. Irulars or Irulas are the predominant tribal sect inhabiting Siruvani Hills. In the present study solvent and aqueous extracts of five selected ethno-medicinal plants traditionally used by Irulas to cure scabies were screened for antibacterial activity. The selected plants are Clematis gouriana (Ranunculaceae), Clerodendrum viscosum (Verbenaceae), Dodonaea viscosa (Sapindaceae), Shorea roxburghii (Dipterocarpaceae) and Toddalia asiatica (Rutaceae). The plant extracts were prepared with solvents, hexane, chloroform, ethylacetate, acetone, methanol and distilled water. The solvent and aqueous extracts thus obtained were screened for antibacterial activity using bacteria, Escherichia coli, Klebsiella pneumonia, Salmonella typhimurium, Staphylococcus aureus and Pseudomonas aeruginosa.
Among the investigated plants, Clematis gouriana was found to exhibit the greatest inhibition effect against the tested organisms by registering a mean value of zone of inhibition 12.13mm followed by Shorea roxburghii (8.56mm) and Clerodendrum viscosum (6.21mm). However Clematis gouriana exhibited nil inhibition activity against E.coli except with hexane extract. Though Shorea roxburghii exhibited an inhibition zone of 8.56mm the mean value was found out to be low.
The least antimicrobial inhibition effect was recorded for Dodonaea viscosa(1.78mm) followed by Toddalia asiatica (0.18mm). Therefore, from the above said results Clematis gouriana, Clerodendrum viscosum and Shorea roxburghii appear to be the most promising ethno-medicinal plants for treating scabies. Phytochemical studies reveal that these plants possess bioactive compounds like glycosides, steroids, terpenoids and volatile oils which might confer antibacterial activity on these plants.
Keywords
Siruvani Hills, Nilgiri Biosphere Reserve, Western Ghats, Irulars, Ethno-Medico-Botanical Studies, Antibacterial Activity, Scabies.- Investigations on Machinability Characteristics of AL/SIC Metal Matrix Composites Using Sinking EDM Process
Authors
1 Department of Mechanical Engineering, Chaitanya Bharathi Institute of Technology, Gandipet, Hyderabad, IN
Source
Manufacturing Technology Today, Vol 16, No 3 (2017), Pagination: 3-9Abstract
As the world is advancing forth technically in the field of space research, missile and nuclear industry, very complicated and precise components having some special requirements are demanded by these industries. The challenge is taken by the new developments taking place in the manufacturing field. Advancement in technology has led to development of many materials with better qualities in order to develop products of greater value. This has led to a search for better materials to satisfy the ever growing demands of product requirement. Composite materials are one such group of materials, they are formed by combining two or more materials to achieve certain desired properties. The focus of present work is on machining MMCs in aluminum matrix with higher percentage of SiCp. In order to machine typical profiles on these materials authors found that conventional processes are not suitable. Conventional machining is uneconomical for such materials and degree of accuracy and surface finish attainable is poor. Hence unconventional methods were chosen. Among the many unconventional processing techniques Electric Discharge Machining (EDM) has proved itself as effective in shaping such difficult to machine materials. The present paper deals with the study of Metal removal rate, Surface roughness, dimensional stability and microstructures machining of MMCs by varying EDM variables namely discharge current, electrode material, volume percentage of SiCp, pulse duration.Keywords
Electrical Discharge Machining (EDM), Metal Removal Rate (MRR), Metal Matrix Composites (MMC).References
- Vinoth Kumar, S; Pradeep Kumar, M: Machining process parameters and surface integrity in conventional EDM and cryogenic EDM of Al-SiCp MMC, ’Journal of Manufacturing Processes’, vol. 20, Part 1, October 2015, 70-78.
- Paramanik, A; Zhang, LC; Arsecularantne, JA: Prediction of Cutting Forces in Machining of Metal Matrix Composites, ‘International Journal of Machine Tools & Manufacture ‘, vol. 46, no. 14, 2006, 1795-1803.
- Manna A; Bhattacharya: A Study on Machinability of Al/Sic-MMC, 'Journal of Material Processing Technology’, vol. 140, no. 1-3, 2003, 711-716.
- Paulo Davim, J: Application of Merchant theory in machining particulate metal matrix composites, ‘Materials and Design’, vol. 28, no. 10, 2007, 2684-2687.
- EI-Gallab, M; Sklad, M: Machining of Al/sic Particulate Metal matrix Composites Part III: Comprehensive Tool Wear Models’, Journal of Materials Processing Technology’, vol. 101, no. 1-3, 2000, 10-20.
- Manna, A; Battacharya, B: A Study on Different Tooling Systems During Machining of Al/SiC-MMC, ‘Journal of Materials Processing Technology’, vol. 123, no. 3, 2002, 476-482.
- Gopalakannan, S; Senthivelan, T; Ranganathan, S: Modelling and optimization of EDM Process parameters on Machining of Al-7075-B4C MMC using RSM, ’Procedia Engineering’, vol. 38, 2012, 685-690.
- Yan, BH; Wang, CC: Machining characteristics of Al2o3/ 6061 Al Composites using rotary electrodischarge machining with tube electrode, ‘ Journal of Materials Processing Technology’, vol. 95, no. 1-3, 1999, 222-231.
- Hung ,NP; Yang, LJ; Leong, KW: Electrical Discharge Machining of Cast Metal Matrix Composites, 'Journal of Materials Processing Technology’, vol. 44, no. 3-4, 1994, 229-236
- Synthesis, Characterization of 3-chloro 4-(4- Substituted Phenyl -1- (4- Nitro Phenylazetidin -2-one by Microwave Method and Evaluation of their Antibacterial Activity
Authors
1 Dept. of Pharmaceutical Chemistry, Annamacharya College of Pharmacy, New Boyanapalli, Rajampet, Kadapa (Dist) A.P, 516115, IN
2 Dept. of Pharmaceutical Chemistry, Annamacharya College of Pharmacy, New Boyanapalli, Rajampet, Kadapa (Dist) A.P, 516115, IN