... respiratory tract due to evaporation or condensation of water. Further, particles which are not spherical may behave in complex ways. Some long thin fibrous particles behave as if they have a very small diameter as they streamline' on air currents and they may penetrate down to alveolar level 4. Gases and vapours Inhaled gases and vapours also have potential to harm the respiratory ... more at risk of both tuberculosis and lung cancer. Asbestosis is the pneumoconiosis due to asbestos inhalation. Asbestos is a group fibrous silicates that combine similar useful properties and rapidly came ...

• Word Count: 3614
• Approx Pages: 14
• Grade Level: Undergraduate

... neuron. Second, the muscle fiber's impulses are conducted along its sarcolemma (plasma membrane), and along the infoldings of the membrane are called transverse tubules. The transverse tubules extend deep into the interior of the muscle fiber, where they are closely apposed to the sacroplasmic reticulum (a specialized smooth endoplasmic reticulum that surrounds the myofibrils). Then, the impulses conducted along the ... capillaries. Smooth muscle cells are long and spindle-shaped, and each contains a single nucleus. They also have actin and myosin, but they are not organized into sarcom...

• Word Count: 9019
• Approx Pages: 36
• Has Bibliography
• Grade Level: Undergraduate

... life processes of respiration and photosynthesis. The roots in hydrophytes are not needed for diffusion of minerals and gases as these are dissolved in the surrounding water and diffused directly into the leaves. In comparison, usually xerophytes have deep root systems to absorb all the water available from the soil and therefore maintain water balance, which is necessary for successful photosynthesis ... water balance for successful photosynthesis and respiration. Mesophytes have well-developed root systems because they rely on their roots to absorb water and nutrients from the soil. T...

• Word Count: 2711
• Approx Pages: 11
• Has Bibliography
• Grade Level: Undergraduate

... sum of its parts, the parts being individual plants of individual species, and the species present and their relative proportions are important descriptive components of it. Descriptions of vegetation take into account plant species and their abundance and size distribution, life forms (trees, shrubs, herbs, bryoids, epiphytes, lianas), seasonal functions (evergreen vs. deciduous), and leaf shapes, sizes ... great variation in tolerance to environmental extremes, maximal in endothermal birds and mammals. Land and water are two basic environments, and many animals move between them or sec...

• Word Count: 12375
• Approx Pages: 50
• Has Bibliography
• Grade Level: Undergraduate

... "What is the soul? - Asks K.A.Helvetsiy. - Do consider it, as they did ancient and early church fathers, the extremely thin and liberated matter and the electric fire that gives life to us? Does this remind me all that she thought about different people and ... the hero and that is yours. Let the water of that in his veins, evaporate into the air, they let rain fall on the mountains, poured streams zdobryat plains and drain into the abyss of the sea, whence came! Let concentrated in this body gathered to light ... associative understanding of the nature of mental attitudes are Wundt, wh...

• Word Count: 4386
• Approx Pages: 18
• Has Bibliography
• Grade Level: Undergraduate

... since magnetic levitation above a superconductor is possible. This principle is employed in high-speed trains that travel at 483 km/h (300 mph) while levitating on a cushion of air. MAKING OF THE SUPERCONDUCTOR When superconductivity was first discovered, it was established that the compounds needed to be cooled to within several degrees Kelvin to absolute zero (zero Kelvin). ... to its normal state, even though it is cooled below its critical temperature. Using a superconductor's ability to "expel" a magnetic field (or flux) as a criteria, superconductors can be divided into 2 groups. T...

• Word Count: 2790
• Approx Pages: 11
• Grade Level: Undergraduate

... -face comedians, Baker & Farrell, a team of white entertainers blackened with brunt cork who ridiculed Negroes while portraying plantation material (McGraw-Hill, 143). Blackface shows, much like a symphony, were segregated into separate parts with distinct characteristics. The last section of the minstrel show was of particular importance because it stressed original plantation dances such as the cakewalk and genuine African melodies ... stereotypic myths that were unrepresentative of both Blacks and slavery. The plantation scenes would seem so realistic with Black men and women singing ...

• Word Count: 4325
• Approx Pages: 17
• Grade Level: Undergraduate

... oil bans of the 1970's made numerous countries mindful of their reliance on controlled non-renewable energy sources and this powered investigation of option energy sources. This included further research into renewable sources, for example, solar force, wind force and geothermal force. A financial leap forward happened in the 1970's when Dr. Elliot Berman had the capacity outline ... exploration progresses material improvement, assembling procedures and hypothetical comprehension of solar cells. In parallel, Oxford scientific experts are dealing with enhanced straightforward directing o...

• Word Count: 3137
• Approx Pages: 13
• Has Bibliography
• Grade Level: Undergraduate

... century saw the continental expansion of the United States and a transportation revolution that resulted from it, as well as industrialization, astonishing population growth and urbanization. The artistic community was called into action, producing whole schools of painting, which glorified the development of the nation. Starting with the Hudson River School founded by Thomas Cole, the nation obtained a visual representation of Manifest ... particularly interesting to note that it was also entitled Manifest Destiny. The central character, an allegory of progress, is described as a "beaut...

• Word Count: 3252
• Approx Pages: 13
• Grade Level: Undergraduate

... original pest. In the 1960s, wildlife biologists were puzzled when the gannet population on Bonaventure Island, Quebec, began to shrink. The shells of the gannets' eggs were too thin to protect the embryos. Only after the eggs had been analysed did the scientists identify the culprit DDT, which had been bioconcentrated through higher levels of the food web. ... , canola oil and baking soda have pesticidal applications and are considered biopesticides. At the end of 1998, there were approximately 175 registered biopesticide active ingredients and 700 products. Biopesticides fall into thre...

• Word Count: 2580
• Approx Pages: 10
• Grade Level: Undergraduate

... in its literal capacity, as a piece of literature. In this I shall study the quality of the William Golding's language, aiming to breathe life into the narration, to create a vividly imaginative tale and to affect emotional responds. I shall finally consider Lord of the Flies' at an allegorical level, ... drained' of all colours but the colours of corruption' and where a dull boom' dominated the air that was hot and held no refreshment' with a brassy glare. This is compared with an air still with an inaudible syllable, cool, moist and clear breeze' and a sky scattered once more ... str...

• Word Count: 3770
• Approx Pages: 15
• Grade Level: Undergraduate

... and profitable. The cumulative effect of these industry advances had a trickle down benefit to all regional carriers as well. Regional carriers with smaller jets were carving their niche into smaller regional markets where, larger airlines were less able to compete. Concerns that existed twenty years ago with regional airlines are all but erased now. The fleet of ... fare. That combined through fare provides considerable savings to the customer. Conclusion Since deregulation in 1978, the U.S. regional airline industry has consolidated its important role in the national air transportation...

• Word Count: 2768
• Approx Pages: 11
• Has Bibliography
• Grade Level: Undergraduate

... some of them have special recipes for Chinese people. For example, Chicken Bundle of Old Beijing is chicken come in a thin hotcake with green onions, cucumber and hosing sauce, and made into a wrap which is composed by way Peking duck is served, however with stir-fried chicken inside. It is flavoured, not ... payment for nourishment at the portal, drive past the eatery, and gather their aliment at the way out.), giving the interior eating, also the open air seating. "Drive-Through eateries more often than have a lot of separate places: car-park, check-zone and pick up zones, while the rec...

• Word Count: 4923
• Approx Pages: 20
• Grade Level: Undergraduate

... inventors and their modern-day counterparts have imagined and created an abundance of amazing inventions. Today, we take these discoveries for granted, as if they appeared by magic out of thin air. Rarely, does one stop to consider the store of scientific knowledge that fostered the many technological conveniences, Americans now enjoy. Nor, do they understand the principles and procedures of ... needs in critical science and technology areas student interest, knowledge, and academic performance must be promoted in our classrooms, and the world must become our laboratory. Beginning now an...

• Word Count: 3297
• Approx Pages: 13
• Has Bibliography
• Grade Level: Undergraduate

... places. Soon after the repeal of Prohibition, the U.S. Federal Bureau of Narcotics (now the Drug Enforcement Administration) began a campaign to portray marijuana as a powerful, addicting substance that would lead users into narcotics addiction. In the 1950s, use of marijuana increased again, along with that of amphetamines and tranquilizers. The social disturbance of the 1960s brought with it a dramatic increase in drug ... enhance the strength and pain resistance of warriors to prepare them for battle, or to program them to kill • As pain or hunger suppressants • To help cope with...

• Word Count: 5106
• Approx Pages: 20
• Grade Level: Undergraduate

... with a military intent. Recalling that the western gopura was built as the main entrance to Angkor Wat, depicting a scene that instilled fear into those who attempt to invade the complex would have been a suitable military tactic based on psychological warfare. The highlighting of military actions through reliefs ... of tons, were bonded together almost invisibly by the use of a vegetable compound that has long since dissolved. Due to the compounds thin consistency an incredible level of precision was used to carve the masonry that propels Angkor Wat upwards from the surrounding flat la...

• Word Count: 4356
• Approx Pages: 17
• Has Bibliography
• Grade Level: Undergraduate

... forces of destiny and free will which brings about the hero's destruction. Shakespeare's tragedies generally have a certain structure in common. Each one is segmented into five acts, each of which are representative of the same general sequence of plot development. Act I serves as an introduction to the situation and the ... he is responsible for the creation of upwards of 2000 commonly used words in our language today. Through his writing nouns were changed into verbs, verbs into adjectives, words never before used together became connected, prefixes and suffixes were added, not to ment...

• Word Count: 3419
• Approx Pages: 14
• Grade Level: Undergraduate