Two categories of essential nutrients: macronutrients need in large quantities; play principal roles in cell structure and metabolism .proteins, carbohydrates micronutrients or trace elements required in small summations; involved in enzyme function and guardianship of protein structure.manganese, zinc, nickel
Chemical Analysis of Microbial Cytoplasm 70% water-Proteins-96% of cell is composed of 6 elements:
Carbon-hydrogen- atomic number 8-phosphorous-sulfur-nitrogen
(B) Feeding requirements- Carbon sources-
Environmental factors basically affect the function of metabolic enzymes:Factors include:
Temperature.oxygen requirements.pH.electromagnetic radiation.barometric closet
Temperature Adaptation Groups-Psychrophiles glacial optimum temperature below 15oC; capable of contractth at 0oC Mesophiles minor body temperature. optimum temperature 20o-40oC; most human pathogens Thermophiles Heat loving. optimum temperature greater than 45oC.Hyperthermophiles- very hot loving, boiling or in a higher place temp
Effects of pH: acidophiles grow at extreme acid pH below 5.
5 Alkalinophiles grow at extreme alkalic pH above 8.5 Neutrophiles neutral PH around 7 (Note) These ph ranges are critical fir cellular region due to their effect on metabolism and enzyme functions
Oxygen Requirement: Aerobe utilizes oxygen and can detoxify it Obligate aerobe - cannot grow without oxygen Facultative anaerobe utilizes oxygen but can also grow in its absence Microaerophilic requires only a small amount of oxygen.Capnophile grows best at higher CO2 tensions than normally defend in the atmosphereBarophiles can survive under extreme pressure and will rupture if exposed to normal atmospheric pressure
dependent ( microbial relationship) organisms live in close nutritional...If you want to yield a full essay, order it on our website: Orderessay
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