Research Papers

Recovery of Lipids from Algae

Kannan D C, Pattarkine V M
| 2013

One of the crucial steps in generating biofuel from algae is the separation and recovery of lipids from algal biomass. These lipids are eventually converted into liquid biofuel after processing and refining. This chapter presents an overview of extraction techniques and some of the challenges in applying these techniques to industrial-scale algal biofuel production. Lipids are well-encased inside algal cell walls. The aqueous environment of the cells makes it even more difficult to extract the lipids. Hexane extraction is presently the most economical method.

Reconstruction and visualization of carbohydrate, N-glycosylation pathways in Pichia pastoris CBS7435 using computational and system biology approaches

Srivastava A, Somvanshi P, Mishra B N
| 2013

Pichia pastoris is an efficient expression system for production of recombinant proteins. To understand its physiology for building novel applications it is important to understand and reconstruct its metabolic network. The metabolic reconstruction approach connects genotype with phenotype. Here, we have attempted to reconstruct carbohydrate metabolism pathways responsible for high biomass density and N-glycosylation pathways involved in the post translational modification of proteins of P. pastoris CBS7435.

Proposed plan for disposal of mercury bearing lamps for India

Pandey S, Hooda R, Mishra A
| 2013

The mercury-bearing lamps, towards the end-of-life, pose significant hazard potential due to the likely release of mercury. Though, these fluorescent lamps (FLs) release relatively less quantity of mercury when disposed as compared to other mercury-based products, they are still a concern due to the large and further growing number of FLs in service, particularly, in the domestic sector and their fragile nature.

Pricing Urban Water Supply

Aggarwal V
| 2013

Right Pricing is key to water sector reforms as it would send correct signals for its use. However, water is generally viewed as a social good rather than an economic good and hence pricing of water is also done accordingly. This has led to over-exploitation of water resources which has bearing for sustainability. Already many states are water stressed and a large section of the population does not have access to drinking water.

Preliminary feasibility evaluation of solar thermal power generation in India

Sundaray S, Kandpal TC
| 2013

Results of a preliminary techno-economic appraisal of solar thermal power generation at three locations in India are presented. The study uses System Advisor Model developed by NREL, USA. The results of the study provide useful insight into (a) selecting appropriate reference direct normal irradiance for design of solar thermal power plants, (b) identifying suitable combinations of solar multiple and hours of thermal energy storage and (c) cost reduction potential. The parabolic trough technology is used for exemplifying the procedure for this purpose.

Performance evaluation of three types of forced draft cook stoves using fuel wood and coconut shell

Raman P, J Murali J, Sakthivadivel D, Vigneswaran V S
| 2013

Many cook stove programs implemented in South Asia and Africa were aimed at reducing fuel wood consumption and pollutants through the use of improved cook stoves. The research work presented in this paper is focused on evaluation of improved cook stoves with respect to thermal efficiency and emission levels. Since the type of biomass fuel varies in different geographical regions, the improved cook stoves must be compatible to use different types of fuel. The present research work is aimed at evaluating three types of forced draft cook stove with two types of biomass fuels.

Monitoring urbanization dynamics in India using DMSP/OLS night timelights and SPOT-VGT data

Pandey B, Joshi P K, Seto K C
| 2013

India is a rapidly urbanizing country and has experienced profound changes in the spatial structure of urban areas. This study endeavours to illuminate the process of urbanization in India using Defence Meteorological Satellites Program - Operational Linescan System (DMSP-OLS) night time lights (NTLs) and SPOT vegetation (VGT) dataset for the period 1998-2008. Satellite imagery of NTLs provides an efficient way to map urban areas at global and national scales.

Molecular tools for tracing arbuscular mycorrhizal fungi (AMF) andplant growth-promoting rhizobacteria (PGPR)

Mathimaran N, Sashidhar B, Srivastava R, Adholeya A, Sharma A K, Aragno M, Wiemken A, Boller T
| 2013

A next-generation green revolution towards a more sustainable, low-input but still highly productive agriculture is urgently needed. A key for this is below-ground: The intricate interplay of plant roots with the soil microbiota is crucial for natural soil fertility and, thus, for any sound agro-ecosystem.

Modeling urban heat islands in heterogeneous land surface and its correlation with impervious surface area by using night-time ASTER satellite data in highly urbanizing city, Delhi-India

Mallick J, Rahman A, Singh C K
| 2013

The present study is an assessment and identification of urban heat island (UHI) in the environment of one of the fastest urbanizing city of India, Delhi Metropolis, employing satellite image of ASTER and Landsat 7 ETM+ in the thermal infrared region 3-14 ?m. Temporal (2001 and 2005) ASTER datasets were used to analyze the spatial structure of the thermal urban environment subsequently urban heat island (UHI) in relation to the urban surface characteristics and land use/land cover (LULC).

Low severity dilute-acid hydrolysis of sweet sorghum bagasse

Banerji A, Balakrishnan M, Kishore V V N
| 2013

Sweet sorghum is emerging as a promising energy crop in India, with potential for ethanol production both from the extracted juice and the bagasse residue. This work investigates the release of fermentable total sugars (TS) and formation of total degradation compounds (TDC) by dilute sulphuric acid hydrolysis of sweet sorghum bagasse from the genotype SSV 84. Hydrolysis was conducted at moderate temperatures (100 °C and 121 °C).