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Escherichia virus T4 is a species of bacteriophages that infect Escherichia coli bacteria. It is a double-stranded DNA virus in the subfamily Tevenvirinae of the family Straboviridae . T4 is capable of undergoing only a lytic life cycle and not the lysogenic life cycle .
Bacteriophage. Anatomy and infection cycle of bacteriophage T4. A bacteriophage ( / bækˈtɪərioʊfeɪdʒ / ), also known informally as a phage ( / ˈfeɪdʒ / ), is a virus that infects and replicates within bacteria and archaea. The term was derived from "bacteria" and the Greek φαγεῖν ( phagein ), meaning "to devour".
E. coli belongs to a group of bacteria informally known as coliforms that are found in the gastrointestinal tract of warm-blooded animals. [ 49] E. coli normally colonizes an infant's gastrointestinal tract within 40 hours of birth, arriving with food or water or from the individuals handling the child.
One study concluded the range of total body iodine content in males was 12.1 mg to 25.3 mg, with a mean of 14.6 mg. [77] It is presumed that once thyroid-stimulating hormone is suppressed, the body simply eliminates excess iodine, and as a result, long-term supplementation with high doses of iodine has no additional effect once the body is ...
Overview. Thermal radiation is the emission of electromagnetic waves from all matter that has a temperature greater than absolute zero. [ 5][ 2] Thermal radiation reflects the conversion of thermal energy into electromagnetic energy. Thermal energy is the kinetic energy of random movements of atoms and molecules in matter.
Bright-field microscopy ( BF) is the simplest of all the optical microscopy illumination techniques. Sample illumination is transmitted (i.e., illuminated from below and observed from above) white light, and contrast in the sample is caused by attenuation of the transmitted light in dense areas of the sample.
Dioecy. Gonochorism. Hermaphrodite. v. t. e. Temperature-dependent sex determination ( TSD) is a type of environmental sex determination in which the temperatures experienced during embryonic/larval development determine the sex of the offspring. [ 1] It is observed in reptiles and teleost fish, with some reports of it occurring in species of ...
Plant morphology. Phytomorphology is the study of the physical form and external structure of plants. [ 1] This is usually considered distinct from plant anatomy, [ 1] which is the study of the internal structure of plants, especially at the microscopic level. [ 2] Plant morphology is useful in the visual identification of plants.