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Define Glass photo-emissive tubes?
Glass photoemissive tubes are those which consist of a curved metal cathode, coated with a photosensitive material. While light strikes its surface, cathode emits electrons which are attracted to positively charged anode, causing a current to flow that is directly proportional to the light intensity. The phototube is either evacuated or filled with an motionless gas at low pressure. In the later, the electrons emitted from cathode strike gas molecules that release more electrons and thus amplify the current response to the fight radiation. Although tubes are available for wavelengths well beyond both ends of the visible spectrum, two tubes are needed to cover a range of 200-800 nm.
Synthesis of citratefrom acetyl CoA and oxaloacetate: Citrate synthase catalyses this aldol condensation reaction with the release of CoA. There are certain inhibitors to this re
Nekton - Aquatic Ecosystem This group contains animals which are swimmers. The nektons are relatively large and powerful as they have to overcome the water currents. The anima
Modes of Respiration Many small organisms obtain oxygen by diffusion through their body surfaces. They do not have any specialised respiratory organs nor do they have blood ci
Q. Where is it produced and what is the function of secretin in the digestive process? Secretin is made in the duodenum the chyme acidity causes the duodenum to release this ho
What are the uses of a barrier membrane is grafting procedures? Uses of barrier membrane in grafting procedures : i) Help in stabilizing the graft ii) Prevents ingrowth
TYPES OF DRUG ACTION - 1 . PHARMACODYNAMIC DRUGS - These drugs modify the physiological and biochemical processes in the patient's body to eliminate the disease.
Indications i) When there is an abnormal rise in the bilirubin level which may be due to physiological or pathological jaundice or any other problem. ii) Prophylactic ph
Q. What functions regulates by hypothalamus? HYPOTHALAMUS - Main visceral control center of the body (yet small in size). Central to virtually all homeostatic control . Th
Define Traditional Methods of Food Processing? Because food is so important to survival and most foods remain edible for only a brief period of time, people as the initial ages
Give three ways in which a plant might be adapted to a hot dry environment. A plant might be adapted to a hot dry environment by having a decreased leaf area, waxy cuticle to
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