Biology as a unified science was first developed in the nineteenth century, as scientists discovered that all living things shared certain fundamental characteristics and were best studied as a whole. Over a million papers are published annually in a wide array of biology and medicine journals,[1] and biology is a standard subject of instruction at schools and universities around the world.

As such a vast field, biology is divided into a number of disciplines. The old divisions by type of organism remains with subjects such as botany encompassing the study of plants, zoology with the study of animals, and microbiology as the study of microorganisms. The field may also be divided based on the scale at which it is studied: biochemistry examines the fundamental chemistry of life; cellular biology examines the basic building block of all life, the cell; Physiology examines the mechanical and physical functions of an organism; and ecology examines how various organisms interrelate. Applied fields of biology such as medicine are more complex and involve many specialized sub-disciplines.

With this complexity in the study of biology, it is found that proper investigation and effective research should be done to further explain each of its fields. That is why microscope is considered the most important tool in studying biology. To respond to this need, biological microscope is created.
Now, to effectively learn biological microscopes, the http://www.biologicalmicroscopy.com site is made. This site is created to answer all your wonders about biological microscopy. Here, you will learn how this is done, and what are its significance in the field of biology. Learn more with us as we journey the world of living things through microscopy.

The lower forms of life variably incorporate features of both plants and animals and do not show the dramatic differences of the higher forms. The lower forms of plants and animals are best studied with the aid of the microscope. It is difficult to define many microbes as either plant or animal, and since bacteria and other microbes long classified as plants have been more closely studied under the microscope, the inconsistencies appear even greater. Because of this fact, a third biologic compartment with equivalent rank to the plant and animal kingdoms has been advocated to sift out the simpler units, designating them as protists. These organisms can be examined more carefully under the microscope. Basically most protists are one-cell units and remain so throughout their life history. Even if they pile cells up in large plantlike masses, their component cells remain the same and do not differentiate.

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Miniaturization of microbiologic technique refers to the use of the commercially prepackaged test units wherein basic reagents for a given biochemical reaction are pre-measured, standardized, and compacted into a tablet or onto a paper disk or filter paper strip. The test unit is applied to cultures in liquid or solid media and is chemically designed so that enzymatic action of the test organism usually results in a color change, or end point, a quick and easy observation under a microscope. There are many varieties of such tests available.

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As special staining methods designed to visualize the chemical substances making up the nucleus in the higher forms of life were applied to the study of bacteria, it became evident that bacteria contained nuclear material. This was seen in electron micrographs as a distinct and relatively transparent structure of rounded proportions with no detectable nuclear membrane. The nuclear material in bacteria consists essentially of a circular molecule of deoxyribonucleic acid (DNA) present as a single chromosome, which if unfolded would stretch approximately 1 mm. It is hooked atone point to an infolding of the plasma membrane known as a mesosome. Many bacteria possess one chromosome, but two or more may be seen in young, actively dividing cells because their rapid rate of growth does not allow sufficient time for DNA to replicate, as seen under a microscope.

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Bacterial Plate Count

The accuracy of the bacterial plate count rests on the premise that when material containing bacteria are cultured, every bacterium present develops into a colony. This statement is not strictly true, since some bacteria may fail to multiply and two or more bacteria may cling together to form a single colony. Nevertheless, the method is of decided value in the examination of’ water and milk.

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