An Overview of environmental issues and protection measures in Indian non-ferrous plants

In the industrial scenario of the country, non-ferrous industry plays a predominant role producing variety of metals and alloys for application in chemical, petrochemical, structural, power and engineering sectors. Base metal industries have witnessed remarkable changes in the past two decades besides registering considerable growth. But, most of these base metal industrial developments are generally associated with environmental degradation viz., by way of discharge of wastes into air, natural water bodies or subsoil. Release of harmful gases and suspended particulate matters (SPM) into air leads to ecological imbalance, resulting in de¬struction of natural life cycle of flora and fauna and many other associ¬ated harmful effects. Environmental degradation has become one of the most pressing problems facing India today. Tackling the pollution prob¬lem needs innovative and effective approach and industries should be encouraged to adopt non-polluting technologies rather than seeking to regulate the discharged toxic effluents. This critical review includes en¬vironmental impacts due to base metal production, approaches to envi¬ronmental improvement and finally examines various options to prevent pollution in base metal industries

Diversity Combining in Antenna Array Base Station Receiver for DS/CDMA System

This paper analyses few schemes for combining base station antenna array signals in wireless DS/CDMA. The performances of equal gain combining (EGC), likelihood rank test (LRT) and a modified rank test (MRT) are evaluated using simulation studies. The results indicate that, under certain assumptions on multiple access interference statistics, the probability of error of MRT is lower than that of EGC, if a few high power interfering users are present along with a low power user of interest. If there are a moderately large number of users and if the received power of all the users are nearly the same, then EGC outperforms MRT. In fact, under this condition, the performance of EGC is close to that of the optimal likelihood ratio test

Studies on maturity onset diabetes of the young (MODY) from S. India

We examined the following aspects of Maturity Onset Diabetes of the Young (MODY): prevalence, vascular complications, insulin secretion in offspring of MODY subjects, insulin resistance and whether MODY can be considered a distinct disease. We report a higher prevalence of MODY among Asian Indian patients. The prevalence rates of microvascular complications in MODY were found to be the same as in classical NIDDM patients. Glucose stimulated insulin and C-peptide responses were compared with non-diabetic controls. In MODY subjects, C-peptide responses were lower, whereas insulin responses were varied. Insulin secretion in offspring of MODY subjects was similarly evaluated, and abnormalities discovered even in these prediabetic subjects. Using the euglycaemic clamp technique, MODY patients were found to be more insulin resistant than classical NIDDM patients. Further lines of evidence are needed to resolve whether MODY can be considered a distinct disease

Catalytic Decomposition of Formic Acid on Zinc Molybdate

202-20

Kinetics of Oxidation of Carbon Monoxide on Lanthanum Cobaltite

285-28

Catalytic Oxidation of Carbon Monoxide on Spinel Type Ferrites : Kinetic Characteristics

205-20

Dehydrogenation of Isopropyl Alcohol on Zinc Molybdate (ZnMoO4)

851-85

Subsistence Entrepreneurship: The Role of Collaborative Innovation, Sustainability and Social Goals

There has been more interest in sustainability in an entrepreneurship setting. This has been the result of the perceived positive social benefits stemming from sustainable entrepreneurship. One of the fascinating areas of research about sustainable entrepreneurship is to understand how it has changed the nature of business. This will help provide policy insights to encourage more research into sustainable entrepreneurship. Traditionally entrepreneurship was considered purely a commercial activity, but this has changed with the advent of interest in social issues. This chapter furthers our understanding about the nature of sustainable entrepreneurship by providing an overview of emerging research trends. Important topics are discussed in a way that preempts the following chapters in the book

Kinetics of thermal decomposition of some metal oxalates

The thermal decomposition kinetics of oxalates of ZnII, NiII and ThIV have been studied in air by isothermal and non-isothermal thermogravimetry. The isothermal kinetic results suggest that the mechanism of decomposition of the zinc compound involves rapid nucleation followed by two dimensional growth in the acceleratory region, while in the case of thorium oxalate, the initial nucleation occurs by a chain mechanism on the surface of the reactant followed by the growth of the product from the surface towards the interior. The results on nickel oxalate could not be interpreted in an unambiguous manner. The activation energy and the frequency factor obtained from TG curves compare well with those obtained from the isothermal method. The activation energies for the dehydration of these oxalates have also been evaluated from the thermogravimetric curves