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Kumar Jebarathnam Prince Prakash Jeba Ragumaran Shunmugavel Nandagopal Ganesan Ravichandran Vijaya Mallavarapu Ramana Murthy Missimer Thomas M. 《Environmental science and pollution research international》2021,28(5):5116-5125
Environmental Science and Pollution Research - Marine and freshwater pollution caused by transport of invasive species in shipping ballast water is a major global problem and will increase in... 相似文献
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Autecology of the common mormon butterfly,Papilio polytes (Lepidoptera : Rhopalocera : Papilionidae)
Atluri JB Ramana SP Reddi CS 《Journal of environmental biology / Academy of Environmental Biology, India》2002,23(2):199-204
The adults of the common mormon butterfly Papilio polytes Linn. feed on a variety of floral species. The larval food plants in the study area included Citrus limon and Murraya koenigii both of the family Rutaceae. The eggs are laid singly, and the hatching time is three days. The larvae pass through five instars. The larval growth is directly correlated with the quantity of food consumed. The AD (approximate digestibility) values decreased from first instar to the last, whereas the ECD (efficiency of conversion of digested food) and ECI (efficiency of conversion of ingested food) values increased, thus bearing an inverse relationship with AD. The development time from egg to adult is 28-30, giving 11-12 generations in a year, but with better breeding during August-February. Thus P. polytes is multivoltine. 相似文献
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K. Ilayaraja M. Ioualalen M. Chlieh R. R. Krishnamurthy M. V. Ramana Murthy 《Journal of Coastal Conservation》2008,12(3):115-124
A numerical simulation of the 26th December 2004 Indian Ocean tsunami for the Andaman and Nicobar Islands case study is presented.
The simulation approach is based on a fully nonlinear Boussinesq tsunami propagation model and included an accurate computational
domain and a robust coseismic source. The simulation is first confronted to available tide gauge and run-up observations.
The agreement between observations and the predicted wave heights allowed a reasonable validation of the simulation. As a
result a full picture of the tsunami impact is provided over the entire coastal zone of Andaman and Nicobar Islands. The processes
responsible for coastal vulnerability are discussed. 相似文献
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K. Dhineka M. Sambandam S. K. Sivadas T. Kaviarasan Umakanta Pradhan Mehmuna Begum Pravakar Mishra M. V. Ramana Murthy 《Frontiers of Environmental Science & Engineering》2022,16(1):10
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Autecology of the tailed jay butterfly Graphium agamemnon (Lepidoptera : Rhopalocera : Papilionidae)
Ramana SP Atluri JB Reddi CS 《Journal of environmental biology / Academy of Environmental Biology, India》2003,24(3):295-303
The Tailed Jay Graphium agamemnon is one of the attractive papilionid butterflies that enliven the environment of Visakhapatnam. It occurs throughout the year. It lays eggs singly on young leaves of the mast tree Polyalthia longifolia var. pendula (Annonaceae). The eggs take 3-4 days to hatch. The larvae go through 5 instars over a period of 15-16 days. The pupal period is 13-14 days. The total period from egg to adult emergence spans over 33-36 days. Based on this short life cycle, and larval and pupal development success studied every month, this butterfly can be multivoltine with a minimum of 7-8 broods in a year. Both CI and GR decreased with the age of larva, their average figures being 3.78 and 0.43 respectively. AD values are high (average 92%) and decreased through successive instars. Both ECD and ECI followed a similar pattern with an increase from instar I up to II, then a decrease up to IV and again an increase in instar V and the highest value is with fifth instar. Adults frequently visited flowers (12-35 flowers in a min) spending 1.0 to 3.2 seconds on a flower. The nectar concentration ranged between 16 and 58%. Peak foraging activity mostly fell between 0900-1000 h. The proboscis received pollen in most of the floral species visited, thus satisfying one of the characteristics of butterfly pollination. Being a fast and strong flier it is treated as "high energy" pollinator promoting cross-pollination. 相似文献
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Pari Y Ramana Murthy MV Jaya Kumar S Subramanian BR Ramachandran S 《Journal of environmental management》2008,89(1):45-57
Coastal subsystems formed by interaction of various processes, impacted by natural hazards like tsunami and storms, pose irreversible morphological changes. Vellar estuary, located on the southeast coast of India, with huge sand dunes (of 3-6m height and spread to 560ha) and barrier islands, has undergone extensive morphological changes due to the giant Indian Ocean tsunami that occurred on 26th December 2004. The damage caused by the tsunami has been quantified using extensive field data collected during pre- and post-tsunami periods through Real Time Kinematic GPS (for mapping coastal features and beach profiles) and Geographic Information System (GIS) couple. The tsunami with a wave height as high as 4m not only inundated the entire coastal land up to a maximum of 2km but also eroded the sand dunes and deposited the eroded material at the inlet, which ultimately formed as a vast tidal flat spread over 31ha. The estuary has suffered immensely due to the tsunami especially in terms of (i) loss of natural protection barriers (sand dunes), which made this coastal area more vulnerable to storm attack, and (ii) shallowness of inlet creating hindrance to navigation of fishing vessels. Based on the observations made at Vellar coast and past recovery experiences of tsunami/hurricanes elsewhere in the world, we contend that the morphological loss might take at least two annual cycles to regain its original form and the rebuilding of sand dunes may even take a decade. 相似文献
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ABSTRACT This paper discusses about the effect of feeder height and heat flux on the heat transfer characteristics of horizontal tube falling film evaporation in the thermal regimes. In order to investigate this, a two- dimensional CFD model was developed to perform simulation and results were compared and validated with published data available in the literature. Heat transfer co-efficients in the thermal regimes were determined from the CFD simulation and the results were recorded, analyzed and validated with the mathematical models available in the literature. The novelty of the current study is to predict the commencement of the fully developed thermal region over the tube from the simulation model under varying feeder height and heat flux. An effort was also made to measure the liquid film thickness around the tube from the CFD model in the thermal regimes. It is observed that angle of thermally developing region contracts and fully developed thermal region extends with the increase of the feeder height and heat flux. It is observed from the study that increase of heat flux by 10 kW/m2 resulted in increase of heat transfer co-efficient value by 10–12% average in thermally developing region and 12–15% average in fully developed region. Thinnest liquid film thickness observed between 85 and 127°angle. Shifting of thinnest region of liquid film upward from the mid tube with the increase of the feeder height and heat flux is noted. 相似文献
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D.K.V. Ramana K. Jamuna B. Satyanarayana B. Venkateswarlu M. Madava Rao 《毒物与环境化学》2013,95(8):1447-1460
Removal of Cu2+, Cd2+, Pb2+, and Zn2+ from aqueous solutions by activated carbon prepared from stems and seed hulls of Cicer arietinum, an agricultural solid waste, has been studied. The influence of various parameters, such as pH, contact time, adsorbent dose, and initial concentration of metal ions on removal was evaluated. The activated carbon was characterized by FT-IR spectroscopy, X-ray diffraction, and elemental analysis. Sorption isotherms were studied using Langmuir and Freundlich isotherm models. All experimental sorption data were fitted to the sorption models using nonlinear least-squares regression. The maximum adsorption capacity values for activated carbon prepared from Cicer arietinum waste for metal ions were 18 mg g?1 (Cu2+), 18 mg g?1 (Cd2+), 20 mg g?1 (Pb2+), and 20 mg g?1 (Zn2+), respectively. The Freundlich isotherm model fit was best, followed by the pseudo-second-order kinetic model. Desorption studies were carried out with dilute hydrochloric acid for quantitative recovery of the metal ions and for regeneration of the adsorbent. 相似文献
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Somani Mohit Datta Manoj Ramana G. V. Hölzle Ingo Sundaram Ravi Sreekrishnan T. R. 《Journal of Material Cycles and Waste Management》2022,24(5):1902-1912
Journal of Material Cycles and Waste Management - This study characterizes the municipal solid waste (MSW) accumulated for more than 25 years at Bhalswa dumpsite, Delhi, India. 50... 相似文献
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Maduru Venkata Ramana Shaik Saboor 《Environmental science and pollution research international》2022,29(10):14299-14315
Environmental Science and Pollution Research - Operational energy use and energy-based GHG emissions of air-conditioning in the building sector are increasing aggressively due to occupants’... 相似文献
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