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Senthilkumar, N.
- Impact of Climate Change on Embryonic and Postembryonic Development of Conocephalus maculatus (Le Guillou) (Orthoptera : Ensifera : Tettigoniidae : Conocephalinae)
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Indian Forester, Vol 134, No 1 (2008), Pagination: 57-65Abstract
Development of Conocephalus maculatus under controlled environmental conditions was studied. In order to test whether the development of C. maculatus is influenced by environmental factors, it was bred in the laboratory under simulated environmental conditions. Water/moisture had an influence on embryonic development of C. maculatus as no eggs developed without water. No hatching occurred, when the eggs were incubated deprived of water for varied periods from 50 days to 12 months and then transferred to moist conditions. Results from this study revealed that C. maculatus does not sustain in drought conditions and does not undergo any egg diapause. They require constant access to water for the development till hatching. At controlled temperature of 24°C and 35°C, eggs hatched in 21-37 and 14-21 days respectively. At temperature fluctuating between 20°C to 30°C (Mean 28.6±1.7°C) the incubation period ranges between 16-26 days. It is also indicated that the embryonic developmental period is inversely proportional to increase in temperature. Both males and females pass through a 6 nymphal instar life cycle, with an average embryonic developmental period of 43.5±7.4 (range between 39-52 days) days. The duration of post-embryonic development is short (male 27-31 days; female 32-40days) in high temperature (35°C), but longer in low temperature of 25°C (male 40-49 days; female 48-55 days). From this study it is revealed that change in climatic factors will lead to change in growth and development of C. maculatus and it may be considered as an indicator species on climate change.Keywords
Conocephalus maculatus, Development Stages, Effect of Climate Change- Insect Pests of Medicinal and Aromatic Plants and their Management : an Overview
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Indian Forester, Vol 134, No 1 (2008), Pagination: 105-119Abstract
Medicinal and Aromatic Plants (MAPs) have great scope to achieve net higher returns and in international agribusiness which has an estimated growth rate of about 5-10 %. However, MAPs are facing danger of extinction due to the attack of some serious insect-pests, diseases, weeds, deforestation, extensive exploitation and harvesting from natural sources and lack of proper knowledge on those problems among majority of the people. Therefore there is an urgent need for through investigation on cultivation management of MAPs. Reports on insect pests of MAPs are meagre and scattered. There are about 40-45 major destructive insect-pest species found causing loss of about 50-60% damage to MAPs. Therefore, it is necessary to follow suitable management strategies involving IPM components of pest management. An overall literature review of insect pests of MAPs and their management is dealt herewith.Keywords
Medicinal & Aromatic Plants, Management of Insect Pests- Bioprospecting with Reference to Medicinal Insects and Tribes in India : an Overview
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Indian Forester, Vol 134, No 12 (2008), Pagination: 1575-1591Abstract
Entomophagy (i.e. use of insects as food) is practiced in many parts of the world including India but the use of insects, as medicine is done in very few parts of the world and we are fortunate that North-East people of India are rich in this traditional medicinal knowledge. Tribes of North-East India have been using several insect based traditional drugs to cure several diseases. Over 500 species of insects are used as medicine to cure common ailments to complicated ailments in the North-East from time immemorial. Some valuable information regarding traditional medicinal uses of common insects by folk doctors has been summarised.Keywords
Entomophagy, Medicinal Insects, Tribes, North-East India- Biological Observations of Himertula vidhyavathlae Sp. Nov (Orhtoptera : Tettigoniidae : Phaneropterinae) under Laboratory Conditions
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Indian Forester, Vol 130, No 12 (2004), Pagination: 1459-1468Abstract
From a global perspective the Tettigoniids or the Long-horned grasshoppers, appear to be a lesser known group of orthopteroid insects, probably because of the difficulties in sampling, laboratory rearing, and also because of its behavioural and ecological uniqueness. Available information on the bioecological characteristics of tettigoniids around the world is very meager. Moreover, no record is available on the biology of Tettigoniidae of Indian subcontinent. The paper presents the mating and ovipositional behaviour of tettigoniid species Himertula vidhyavathiae Ingrisch and Muralirangan, 2003.- Population Dynamics and Life Table Studies of Conocephalus maculatus in Chennai District of Tamil Nadu, India
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Indian Forester, Vol 132, No 9 (2006), Pagination: 1167-1184Abstract
Population dynamics and life tables of Conocephalus maculatus were studied by field census data and laboratory rearing. Five differents localities, representing four habitat types such as forestland (Guindy Reserve Forest), agricultural crop field (Kanchipuram), grasslands (Nungambakkam and Kodambakkam) and wasteland (Chenglepet) were selected as study sites. Adults as well as nymphs were recorded throughout the year in all habitats except at Chenglepet (wasteland) where they were observed only during rainy months from September to November. In general, adult populations showed a slightly decreasing trend in abundance from January to June each year, with the population building up from August and attaining a peak in October. More or less similar trend was observed in all the three years of study. Laboratory breeding was done at a mean temperature of 23°C and a relative humidity of 60% and baby corn (an immature flowering part of Zea mays) as food material. Pieces of Panicum maximum were provided for oviposition. Life tables based on age specific survival and fecundity of mated females, were constructed following the standard procedure. The results from the laboratory observations revealed that 49% mortality was prevalent at the egg stage itself. Survival of C.maculatus decreased with increase in the age. The total generation mortality in laboratory studies is less when compared to the wild population because in the laboratory conditions they are devoid of natural enemies and are not affected by extreme weather conditions. The proportion of female births obtained in the next generation was very low. This is because of the high mortality in the early nymphal stages. The net reproductive rate for the next generation was lowered considerably. In sum this study indicates that the temperature and rainfall play a vital role in the population dynamics of C.maculatus. The differences in the population dynamics of C. maculatus in different habitats may be due to their local physical environment including availability of hosts.- Strategies for the Management of Craspedonta leayana (Coleoptera : Chrysomelidae) in Gmelina arborea
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Indian Forester, Vol 132, No 5 (2006), Pagination: 581-588Abstract
Gmelina arborea (Roxb.) has gained widespread acceptance as a plantation species worldwide due to its rapid growth and multiplicity of uses in pulp and fiber production, besides an excellent saw timber has number of promising attributes. The strategy for addressing a major drawback for its susceptibility to Craspedonta leayana (Latreille) in native areas has been discussed. This includes mass multiplication and application of parasitoid Brachymeria excarinata, Beauveria bassiana and Metarhzium anisopliae. The screening of resistant germplasm for Craspedonta leayana was found to be an effective long term strategy.- Impact of Natural and Anthropogenic Disturbances on Orthopteran Community in Kaziranga National Park, Assam, India
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Indian Forester, Vol 139, No 6 (2013), Pagination: 547-552Abstract
Impact of natural and anthropogenic disturbance on orthopteran assemblage under grasslands and forestlands in Kaziranga National Park, Assam was studied using BACI (Before-After-control-Impact) method. The study showed that there is a change in the assemblage of orthopterans in the disturbed sites due to natural (flood) and anthropogenic (corridor-road) disturbances in grasslands and forestlands, respectively. Though there is a reduction in the population of orthopteran species after a heavy rainfall, changes in the assemblage of orthopteran community in the disturbed site were in significant. However, in case of forestland frequently disturbed (corridor-road) due to movement of automobiles, the population remain fragmented.Keywords
Orthoptera, Anthropogenic Disturbance, Kaziranga National Park, Grassland and Forestland- Synthesis And Biological Evaluation of New S-Mannich Bases of 3-Methyl-4-Phenyl-3,4,5,6,7,8, Hexahydroquinazoline-2(1h)-Thione
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1 Department of Pharmaceutical Chemistry, JKKMMRF College of Pharmacy, B. Komarapalayam, Namakkal, Tamil Nadu – 638 183, IN
1 Department of Pharmaceutical Chemistry, JKKMMRF College of Pharmacy, B. Komarapalayam, Namakkal, Tamil Nadu – 638 183, IN
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Asian Journal of Research in Chemistry, Vol 4, No 10 (2011), Pagination: 1573-1577Abstract
The chalcone was synthesized from cyclohexanone and an aromatic aldehyde by aldol condensation reaction, followed by cyclisation with thiourea results in hexahydro quinazoline. The third position is methylated by using methyl iodide, finally the mannich reaction was carried out with five different amines at second position of the hexahydro quinazoline to get five different S-Mannich bases. All the 5 synthesized new compounds were studied for their physiochemical characters. And their structures were confirmed by spectral studies (IR, NMR). These new derivatives were evaluated for analgesic and anti-inflammatory activity.
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S-Mannich Bases, Quinazoline, Chalcone.- Simultaneous Estimation of Telmisartan and Pioglitazone in Pharmaceutical Dosage Form by RP-HPLC Method
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1 J.K.K. Munirajah Medical Research Foundation, College of Pharmacy, Komarapalayam-638183, Namakkal Dt, Tamilnadu, IN
1 J.K.K. Munirajah Medical Research Foundation, College of Pharmacy, Komarapalayam-638183, Namakkal Dt, Tamilnadu, IN
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Asian Journal of Research in Chemistry, Vol 3, No 2 (2010), Pagination: 364-366Abstract
A simple, precise, accurate, rapid and reproducible RP-HPLC procedure was developed for simultaneous estimation of Telmisartan and Pioglitazone in pharmaceutical dosage form at a single wavelength. The mobile phase used was a combination of acetonitrile:0.5% triethylamine (pH 4.5 with orthophosphoric acid) (65:35). The detection of the combined dosage form was carried out at 210 nm and flow rate set 1.3 ml/mins. Linearity obtained in the concentration range of 10 to 50 μg/ml for Telmisartan and 7.5 to 37.5 μg/ml for Pioglitazone with correlation coefficient of 0.9997 and 0.9995 respectively. The result of analysis were validated statistically recovery studies confirmed by the accuracy of the proposed method.Keywords
Simultaneous Estimation by RP-HPLC, Telmisartan, Pioglitazone.- Simultaneous RP-HPLC Method Development and Validation of Cefixime and Ofloxacin in Tablet Dosage Form
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1 J.K.K. Munirajah Medical Research Foundation, College of Pharmacy, Komarapalayam-638183, Namakkal Dt, Tamilnadu, IN
1 J.K.K. Munirajah Medical Research Foundation, College of Pharmacy, Komarapalayam-638183, Namakkal Dt, Tamilnadu, IN
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Asian Journal of Research in Chemistry, Vol 3, No 2 (2010), Pagination: 367-369Abstract
A simple, precise, accurate, rapid and reproducible RP-HPLC procedure was developed for simultaneous determination of Cefixime and Ofloxacin in tablet dosage form at a single wavelength. The determination was carried out by using Phenomenox, Gemini C18, Column (50×4.6 mm) with mobile phase used as a combination of acetonitrile:0.05 M Tetra butyl ammonium Hydrogen Sulphate (pH 6.0 with orthophosphoric acid) (35:65). The detection of the combined dosage form was carried out at 290 nm and flow rate set 2.0 ml/min. Linearity obtained in the concentration range of 160 and 240 Cefixime and Ofloxacin with correlation coefficient of 0.9999 and 0.9999 respectively. The result of the analysis were validated statistically and recovery studies confirmed by the accuracy of the proposed method.Keywords
Cefixime, Ofloxacin and RP-HPLC.- Bioanalytical Method Development and Validation of Esomepraole in Human Plasma by LCMS/Ms
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1 Department of Pharmaceutical Analysis, J.K.K.Munirajah Medical Research Foundation College of Pharmacy, The Dr. M.G.R. Medical University, Komarapalayam-638183, Namakkal Dt, Tamilnadu, IN
1 Department of Pharmaceutical Analysis, J.K.K.Munirajah Medical Research Foundation College of Pharmacy, The Dr. M.G.R. Medical University, Komarapalayam-638183, Namakkal Dt, Tamilnadu, IN