Fossil fuels play a major role as a leading source of energy for a foreseeable future and their persistent use inherently result in production of greenhouse gases, particularly, carbon dioxide. Therefore, carbon capture, carbon sequestration and other carbon dioxide abatement techniques have gained major focus in the research and development Read more…
In the recent days, people prefer using online media for communicating, collaborating and sharing information with each other. This exchange of information through internet is a form of E- Learning. It is one of the most popular learning tools these days, helping large number of learners with different backgrounds, capabilities Read more…
1.1 Vitamin C and its Importance The human body requires an ongoing amount of vitamin C that is obtained through fruits and vegetables that are consumed. The intestinal tract is responsible for the absorption of vitamins, restricting the amount that allowed to be absorbed so as to prevent an excessively Read more…
The example that best demonstrates evolution of the basic structure of the community is that of the development of a terrestrial community of a modern type by early reptiles some 250 million years ago. Between the time when vertebrates (amphibians) first became able to lead a predominant terrestrial existence some Read more…
Likewise, sun’s altitude changes due to differences in latitude, changes in the season and in the time of day. When sun remains overhead, the intensity of sunlight over the earth’s surface will be greatest. At higher latitudes the intensity of light becomes correspondingly reduced. The illumination or intensity of daylight Read more…
To give order to the study of communities, some system of classification is needed, even though the communities of a region often cannot be placed in discrete units. The most widely used classification systems are based on physiognomy, habitat, floristic characteristics like species composition and dominance and community dynamics. 1. Read more…
Power is Evil: Power holders are regarded as potential enemies and usurpers of the rights of the people. According to this view power should be resisted because it is morally dangerous. The subtle exercise of power has a sinister and evil connotation. The evil reputation of power is justified on Read more…
1. Bureaucracy does not adequately flow for personal growth and development of mature personalities. 2. It develops conformity and “group-think”. 3. It does not take into account the “informal organisation” and the emergent and unanticipated problems. 4. Its systems of control and authority are hopelessly outdated. 5. It has no Read more…
Abstract Wireless communication transmits and delivers data wirelessly by utilising the behaviour of electromagnetic spectrum. Radiation is classified by the wavelength. The most commonly used radiation for wireless communication technology is radio waves, which has a long wavelength and is applicable for smart phone, etc. However, Visible Light Communication (VLC) Read more…
This theory posited the concept of constant and gradual change as characteristic of all life. To this, geneticists contributed the finding that characteristics favoured by selection are passed on from generation to generation according to Mundelein laws of particulate inheritance, thus preserving genetic variation in a population. Further, individuals do Read more…
ABSTRACT Bubugn is a cereal based traditional fermented Ethiopian beverage. It is one of the traditional fermentedbeverages used fora drink ofholidays, weeding ceremony and also used as a source of income. The aims of this study were to determine the microbiology, microbial contaminants and physicochemical characteristics ofBubugn, a traditional fermented Read more…
2. The thermal resistance of a species may be closely identified with the genetic composition of the parent stock, as illustrated by hybrid development in two anuran species, Bufo valliceps and B. luetkeni (Ballinger and Mc Kinney, 1966). The lower lethal temperature for development of B. valliceps is 18°C; for Read more…
Radial symmetry is a characteristic of such animals. Transformation from a sessile to a locomotive existence favours a bilateral symmetry. The currents of water often abrade the inhabiting flora and fauna and varied modifications are encountered to withstand this abrasive action. Thick scales, strong shells and many attachment devices like Read more…
Table 11.1. Essential elements (Clapham, Jr., 1973): Macronutrients: Elements used in relatively large quantities.Micronutrients: Elements generally needed in relatively small quantities.Micronutrients: Elements needed by certain species in relatively small quantities. CarbonIronSodium HydrogenManganeseVanadium OxygenBoronCobalt NitrogenMolybdenumIodine PhosphorusCopperSelenium CalciumZincSilicon MagnesiumChlorineFluorine SulphurBarium Some of these tabulated elements are used in relatively large quantities as Read more…
Autecology because it is concerned with the relationship of an organism to one or more variables such as light, temperature, moisture, or salinity, is easily quantified and subject to experimental design both in the laboratory and in the field. Synecology is largely descriptive and not easily subject to experimental design. Read more…
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