eChapters

Viruses can be cultivated only in living cells. Laboratory animals, embryonated avian eggs and cell cultures are three systems available for this purpose. These three systems are used for the basic procedures of isolation and identification of viruses, maintenance of stock cultures and production of vaccines.
Cultivation of Viruses in Laboratory Animals
Animal inoculation helps to confirm the infectious nature of the disease. Laboratory animals used for many kinds of virological works such as clinical studies, pathogenicity of viruses, epizootiology, potency tests on vaccines and production of diagnostic and prophylactic antisera.

An ideal experimental animal is one that is
1. Uniformly and fully susceptible to the virus under study
2. Free from intercurrent infection and adventitious lesions and
3. Inexpensive purchase and maintain
If possible it is better to use germ free, specific pathogen free or colostrums deprived animals for experimental purpose. The same species of animals or atleast closely related species of the natural host is selected for inoculation, wherever possible. For example in case of swine fever, which shows a high degree of host specificity, the same species should be used for inoculation. in others such as in case of rabies with low host specificity, the causative virus will grow in a wide range of animals.

Introduction
Soil is considered as a thin layered living entity over the earth’s surface, poses a profound implication on the solidity of ecosystems. It act as a transient nutrient sink for the plants and plays a crucial role in the crux of biogeochemical cycling of Earth’s elements which is being carried out by distinct microbial assemblages present in the soil profile. Soil is the most diverse niche for the microbial communities in which large proportion of taxa exists at a very low correlative abundance. Despite the extensive importance of this entity it has been snubbed lately with the various undesirable activities done by human kind. Therefore, the scientific understanding of soil origin is critical. Scientifically speaking, formation of one inch of soil almost took 15 years if the parent materials are soft whereas hard parent material might takes hundreds of year for its development. Soil horizon involves the arrangement of mature soil in a series of zones. Each horizon encompasses the distinct texture and composition that varies with different kinds of soils. Soil profile is the cross sectional view of the horizons in a soil. The O horizon is the topmost layer of soil, mainly consists of partially decomposed leaves, animal wastes, fungi and other organic materials. A horizon is looser than other deeper layers of soil, mainly dark in colour and considered as the uppermost layer of the soil consisting of partially decomposed organic matter known as humus. Generally, in the upper layers of soil the roots of most plants exist. As long as these layers are supported by vegetation, it acts as a storehouse of water which gets released in a trickle throughout the year. Plant roots grow in the soil and absorb nutrients and water which are required during the process of photosynthesis that helps in the growth and development of plants. Soil contains essential nutrients which are being adsorbs by the plants and is beneficial to all living organisms such as herbivores and omnivores depends on plants for their food, then these being eaten up by carnivores and omnivores in the food web, so nutrients that are absorbed from the soil is reached to all strata of living entity. Soil is a niche for different organisms as its top layers harbors a large population of bacteria, fungi, earthworms and many other small insects that

Abstract

The groundwater targeting in hard rock aquifer systems is complex, because of the heterogeneity of the aquifer systems. The ground water mobility and stability in such aquifer systems varies because of the lithology, folded structures, fracture density, geomorphology, slope etc., These occur in various permutations and combinations and control the overall water holding and conducting capacity in different parts of the aquifer systems. Hence, one needs to analyse all the data so as to understand and bring out precise spatial models on the groundwater probability in hard rock aquifer systems. In the present study, the authors have carried out GIS based appraisals to understand the relation between the lithology and groundwater movement in hard rock aquifer systems of parts of Central Tamil Nadu covering 1300 sq.km. In the said study, GIS images were generated on the maxima zones of various aquifer parameters such as water level, width of aquifer depletion, transmissivity, permeability, specific capacity, storage co-efficient, optimum yield and recovery rate. These were overlaid with the lithology GIS image. Such an analysis has shown that, in general, the fissile hornblende biotite gneiss appears to have some control over the groundwater systems.

    ·    An X-ray tube is an energy converter. It receives electrical energy and converts it into two other forms: X-radiation and heat.

    ·    It is a source of X-rays used in diagnostic radiology.

    ·    Designed and constructed to maximize X-ray production and to dissipate heat as rapidly as possible.

    ·    It is a thermo ionic diode type electronic vacuum tube where X-rays are produced.
 
    ·    A basic element of an X-ray tube (Figure) consists of the cathode, anode, glass tube and tube housing.

Fisheries
DSIR/TPDU/TIF 056 and E-28-GO-GOI Research Scheme on “Documentation and Preservation of Agricultural Traditional Knowledge through Farmer Participatory Approach”

Introduction

Sheep and goats have a vital economic importance in India, inhabitant in semi-arid region and mostly rose under harsh environmental conditions (high ambient temperature, scarcity of feed and water). The arid and semi-arid regions of India are drought prone due to low and uneven rainfall.  The vegetation of arid and semi-arid tract is more acute during summer when the quality of the pastures becomes vulnerable which in turn decreases the body condition score of animals and reproductive efficiency is being compromised (Maurya et al. 2009a & 2010).  The small ruminants are widely distributed in comparison of other domesticated species. These species of livestock is also a source of employment for marginal and land-less farmers particularly in the arid and semi-arid region of India. Most of the Indian farmers have limited resources and small ruminants production offers an opportunity to alleviate financial conditions and improve living standards.

Materials Required

Fruit juice/ pulp, cane sugar, potable water, essence, citric acid, colours, preservatives, weighing balance, bottling and sealing facilities, hand refractometer, homogenizer etc.  

Procedure

    1.    Extract the juice as discussed in previous exercise.
    2.    Filter the fresh or preserved juice through muslin cloth.
    3.    Calculate the quantities of juice, sugar, water, acid (if required), preservatives, colour, essence etc. required for preparation of a known quantity of                      squash as per FPO specifications.
    4.    Prepare the beverage as directed by instructor
    5.    Pack the beverage in bottles 
    6.    Seal the bottles and label them
    7.    Take out one of the bottles and measure its TSS and titratable acidity.

ABSTRACT

Soil is the medium in which the plant growth and development occurs. Soil type might change with genesis of the parent material and with prevailing weather conditions. Dominant soils of Tamil Nadu are Black soil, Red soil, Laterite soil and Hill soils. Each soil type has an inherent potential to retain and release nutrients to plants. The availability of nutrients varies from place to place and hence spatial distribution of nutrients, quantity of nutrients along with plant available water determines phenological development of crops. Nutrients are broadly classified as Macro and Micro nutrients that are required for crops in large and small quantities respectively. Availability of both macro and micro nutrients and its spatial distribution has not been attempted so far at a regional level. Such regional level approach of nutrients would suffice the researchers and policy planners to employ these data as inputs to Crop Simulation Models (CSM) in forecasting productivity of crops.

Thiruvannamalai district in Tamil Nadu is divided into 6 taluks, 18 blocks covering an area of 6,31,205 haof land. The district lies between 12⁰ 00’ to 12⁰ 55’ N latitude and 78⁰ 37'to 79⁰ 45’ E longitude. Red loamy soil is predominantly prevalent followed by black loamy soils. Generally paddy, groundnut, sugarcane, millets and pulses are cultivated during fasli season. This district was chosen as our study area.

A study has been attempted to map micro nutrients of Thiruvannamalai district. Geo-referenced surface soil samples from eighteen blocks of Thiruvananmalai district covering maximum soil units of soil map were collected randomly as per procedure adopted by soil survey manual. Global Positioning System (GPS) were used to collect corresponding geographic coordinates from each soil sampling point covering the entire Thiruvananmalai district by using Rikaline Bluetooth GPS 6031- X7 model. Approximately one thousand five hundred surface soil samples were collected, air dried, powered and sieved as per standard conditions. Soil samples were analyzed for its physical, chemical and fertility properties. Fertility maps for Micro nutrients such as Zinc, Iron, Manganese, Copper and Boron were plotted in ARCGIS Desktop. Micronutrients maps form a part of base map in analyzing and preparing an aggregated fertility map of Thiruvannamalai district.

Abstract

An intellectual property infringement is the violation of an intellectual property right of the owner. Infringement is established based on the law governing appropriate IPR in the concerned country. Both civil and criminal remedies are available under the concerned law. The present paper introduces the patent infringement as per Indian Patent Act, 1970. It discusses various modes and types of infringements which can take place. It further discusses a procedure to formulate opinion about product infringing a granted patent. In the end some usual defenses against patent infringements have been discussed. Some case studies have also been presented along with the damages awarded for the patent infringement.

Information on the avifauna of an area is a prerequisite to assess the status of birds and the habitat quality with specific attention to indicator species including the rare, endangered and endemic species. Birds are one of the best indicators of the health of an ecosystem. They are highly mobile and easily observed indicators of change in the environment (Holmes et al., 1986). Many wetland species also play a role in the control of agricultural pests, while some species are themselves considered pest of certain crops. After fish, birds are probably the most important faunal group that attract people to wetlands. Loss of wetland habitats through direct and indirect modifications and non-sustainable harvesting of water birds for human needs have led to decline in several water bird populations and a number of species (Jin-Han Im et al., 2001).

Some of the most catastrophic declines of birds have taken place in the last few decades and the list of threatened species in the Asia- Pacific region has expanded rapidly to include species from a large range of water bird groups. While decline of some populations has been well documented, the fates of many others remain unknown. It is vital to understand the underlying causes in population changes and to attempt to control these trends in order to prevent key component of biodiversity of wetland habitat from being lost. The number of water birds using a particular habitat is related to types and quality of habitats, abundance and availability of food and level of disturbance. Monitoring of water birds can thus provide valuable information on the status of wetlands and can be a key tool for increasing the awareness of importance of wetland and conservation values. In this chapter, the status, occurrence and species composition of avifauna recorded from Kole wetlands are elucidated.

Introduction

India is considered as the “Home of Spices”. They are a prized group of minor components and have been an integral ingredient of Indian diet. Since antiquity, spices form an important part of the Ayurvedic Pharmacopoeia (The Indian System of Medicine), with their widespread traditional use. With its wide climatic conditions and topographical features, India naturally possesses wide variety of medicinal flora. The country enjoys the distinction of being the largest producer and consumer of spices as well as the fastest growing spice market in the world.

Spices are potent plant foods that possess a wide range of nutrient bioactive compounds that contribute to improve health, while adding variety, colour, flavour and aroma to daily diet. The term spice or condiment applies to “such natural plant or vegetable products or mixtures thereof, in whole or ground form, as are used for imparting flavour, aroma and piquancy to and for seasoning food” (Sikri and Berwal, 2008).

Webster (2011) describes spices as ‘Any of various aromatic vegetable productions as pepper, cinnamon, nutmeg, mace, allspice, ginger, cloves, etc., used in cookery to season and to flavour sauces, pickles, etc.; a vegetable condiment or relish, usually in the form of a powder; also, as condiments collectively’.

In India, during the early days, guava plants were generally propagated by seeds from limited varieties available with nurserymen and pomologists. The seedling population obtained by open pollination gave rise to considerable variation in the form and size of fruit, the nature and flavour of pulp, seediness and other morphological characters such as spreading or erect growth habit of trees (Naik, 1949). Cheema et al., (1954) observed all the cultivars of guava to be highly heterozygous. Commercial producers utilized the variation thus obtained for selection of desirable genotypes and propagated them vegetatively. Assessment of genetic diversity and relationship among Psidium spp was carried out by Sharma et al (2007). They observed a high genetic similarity between Chinese guavas grouped with Psidium guajava cultivars. It has been observed that only a few named varieties are under cultivation. Most of these varieties suffer from one defect or the other. Hence, guava improvement by breeding was started mainly with the following objectives for developing new cultivars:
i) dwarf plant habit suitable for high density planting
ii) fruits with uniform shape, size, good colour, firm and thick pulp, good aroma, few and soft seeds, high TSS and high pectin
iii) long shelf life
iv) resistance to Fusarium wilt
15.1 Major breeding methods used
Plant introduction- Most of the guava varieties have evolved as selections from seedling variants. Variability has come about because of open pollination from highly heterozygous parents. Several introductions of promising genotypes have been made in guava growing countries. In India, many introductions made from Hawaii, Brazil, Thailand, etc. are being cultivated and used in breeding programmes. Similarly, introductions of Indian cultivars like Allahabad Safeda and Sardar have given excellent results in other parts of the world (Gonzaga et al, 1999). Although introduction is a potential tool in

Introduction

Soil, water and vegetation are three basic natural resources. The survival of God’s creation depends upon them and nature has provided them as assets to human beings. The management of natural resources to meet people’s requirements has been practised since the pre-Vedic era. Farmers were ranked high in the social system and village management was in their hands. Over-exploitation of natural resources by growing population resulted in various severe problems. Destruction of vegetation has resulted in land degradation, denudation, soil erosion, landslides, floods, drought and unbalanced ecosystems. A balanced ecosystem is an urgent need.

There is an increasing realization throughout the world, about the state of our environment, caused by over-exploitation of natural resources for economic development. Resource exploitation in the developing world has largely been geared to meet the very basic needs of food, fodder, fuelwood and shelter of a large section of deprived societies. On the other hand, developed parts of the world have largely concerned themselves in trying to maintain and accelerate the already very high levels of resource consumption that they have achieved for a much smaller segment of the world’s population, based on an early initiative taken and advantage gained through industrialization. Natural resource base has often viewed as limitless by the industrialized world either due to a myopic view of the future or because of their immense faith in technology being able to substitute for the natural resource capital. This faith in technological quick-fixes for world’s problems linked with over-consumption is still prevalent.

Abstract

The paper discusses patentability aspect of subject matter. Patentable subject matter must satisfy three basic criteria i.e. novelty, inventiveness and industrial applicability, though few subject matter satisfying all the three basic criteria stated above may still be not patentable in specific jurisdiction based on certain circumstances or as stated in the patent act of the specified jurisdiction. Therefore grant of a patent is subject to certain limitations mentioned in the section 3 and 4 of the Indian Patent Act for Indian jurisdiction. The aim of this paper is to study such limitations in detail.

A big layer of air called the atmosphere surrounds the earth. The air within this layer moves from place to place when it warms up or cools down. This moving air is known as wind. In other words, air in motion is called wind. Winds move moisture and heat around the world and also produce much of our weather.

The strength of the wind can vary enormously. Sometimes air moves slowly and the wind is barely noticeable. When the weather is clear there may be a gentle breeze. When the wind is still very light, but it can be felt and there may be rustlings by leaves. At other times, the air can move very quickly and become a gale or hurricane, blowing down trees and damaging electric poles and buildings.

Winds are part of a global air circulation system that acts to balance temperature and pressure around the world. Different parts of the world receive different amounts of heat from the sun. This differential heating in turn results in differences in temperature and air pressure around the world, which drives the world’s winds.

As equatorial areas are heated most, the air above them warms and rises as it becomes lighter than the surrounding air, causing an area of low pressure. In cooler areas, the air sinks because it is heavier and results in an area of high pressure. Winds will blow as air is squashed out by the sinking cold air and drawn in under the rising warm air. Any difference in temperature like this will always cause a difference in air pressure, and therefore winds will blow. These movements result in a global wind pattern, with air moving between different areas around the world and also at different heights in the atmosphere. Colder air from the poles tends to sink and move towards the equator closer to the surface of the earth. In contrast, warm air from the equator rises and moves towards the poles high in the atmosphere because it is lighter.

7.1 Summary

Never ever in the annals of human civilization, the importance of ecological resilience has become so important and imperative as we are perceiving now. Both the need and greed of food economics have driven the resource bases of our ecosystem, to a dilapidated and fragile status. By 2050 the world’s population will touch close to 9.5 billion and we have to scale up our food production 60% more then what it is right now. In India by 2040, we have to cross 450 million tons of our targeted food production to keep rhythm with population growth. By 2035 we are going to cross the population of China. Understanding the cascade of risks for climate change, as well as the vulnerabilities to these risks, is key to frame ways to adapt. Reducing vulnerabilities is key to reducing the net impacts on food security and nutrition and also to reducing long-term effects. Increasing resilience of food security in the face of climate change calls for multiple interventions, from social protection to agricultural practices and risk management..

When population pressure is soaring up, the need to produce more food from less and less available land and water, the issues of ecological resilience are coming up more swashbuckling and humongous. The aftermath of green revolution has contributed to achievement in food security on one hand, the other hand water has been contaminated and depleted, soil has been eroded with a sharp decline of organic carbon. We are losing 15 tons of topsoil per hectare per year and inviting a disruptive agro-ecosystem, the syndrome of which are quite vivid and prominent.

Any undesirable change in physical, chemical and biological properties of air is called air pollution. Air pollution interferes with wellbeing of living livelihood. Various human made and anthropogenic sources which deteriorate the air quality are called air pollutant. Some of the common air pollutant are dust, smoke, smog, fog, aerosol, SO2, CO2, O3 and NOx etc.
Sources of Air Pollution
The sources of air pollution are classified into two categories:
1. Natural source
2. Man-made source
1. Natural sources
• Ash from burning volcanoes, dust from storm, forest fires
• Pollen grains from flowers in air are natural sources of pollution
2. Anthropogenic (man-made) sources
They are population explosion, deforestation, urbanization and industrialization whose effect can be explained as fallow:
a) Power stations using coal or crude oil release CO2 in air
b) Also furnaces using coal, cattle dung cakes, firewood, kerosene, etc.
c) Steam engines used in railways, steamers, motor vehicles, etc. give out CO2.
d) So do Motors and internal combustion engines which run on petrol, diesel and kerosene. etc.
e) Vegetable oils, kerosene, and coal as household fuels
f) Sewers and domestic drains emanating foul gases
g) Pesticide residues in air
h) Carbon monoxide and Nicotine from smoking
i) Thermal power plants pollute air by emitted sulphur dioxide and fly ash
j) Fertilizers and pesticides

Introduction

The prosperity of Tamil Nadu depends on the development of rural areas. As per the 2001 Census, Tamil Nadu’s rural population was 36.2 million, amounting to 58% of the total population. Of these 90 percent are earning their livelihood through agriculture and allied activities. The agricultural situation in Tamil Nadu largely depends on the quantum of rainfall received during seasonal rainfall of South West and North East monsoon. North East monsoon which occurs around September to November is more crucial as South West monsoon which will give enormous rainfall to other Indian states is blocked by Western Ghats. So Tamil Nadu is receiving low rainfall and it also comes in three to five heavy showers during October and November. This limits the wet period (good condition for cultivation) to two to five weeks for the whole season. The wet period is further shortened by fast wind and soil type in some area. Thus, the success of the crop is largely determined by one’s capacity to exploit the short wet period. Even though the Tamil Nadu is relatively better position in tapping available ground water resources (92 percent of potential has been tapped), 82 percent of the well is owned by medium and large farmers who is only 10 per cent of total cultivators.

Potato is a major food crop, grown in more than 100 countries in the world and it is one of the major commercial crops grown in India. India ranks third by contributing around 7.5% to the world’s production. During 2006-07, 27 million tonnes was produced in an area of about 1.5 million ha. However, potato consumption per capita in India (14.8 kg/head/year) is one of the lowest in the world and hardly one per cent of the potato is processed.