beta emitter
51potassium-40 — A naturally occurring (0.0117%) radioactive potassium isotope; beta emitter with half life of 1.26 billion years; chief source of natural radioactivity of living tissue …
52potassium-42 — An artificial potassium isotope; beta emitter with half life of 12.36 hr, used as a tracer in studies of potassium distribution in body fluid compartments and in localization of brain tumors …
53potassium-43 — An artificial potassium isotope; a beta emitter with a half life of 22.3 hr, used as a tracer in myocardial perfusion studies …
54sodium — A metallic element, atomic no. 11, atomic wt. 22.989768; an alkali metal oxidizing readily in air or water; its salts are found in natural biologic systems and are extensively used in medicine and industry. The s. ion is the most plentiful… …
55sulfur-35 — A radioactive sulfur isotope; a beta emitter with a half life of 87.2 days; used as a tracer in the study of metabolism of cysteine, cystine, methionine, etc.; also used to estimate, with labeled …
56copper-64 — Beta and positron emitter with a half life of 12.82 hr. Used in the study of Wilson disease and in brain scans for tumors …
57copper-67 — Beta and gamma emitter with a half life of 2.580 days …
58Bipolar transistor biasing — Bipolar transistor amplifiers must be properly biased to operate correctly. In circuits made with individual devices (discrete circuits), biasing networks consisting of resistors are commonly employed. Much more elaborate biasing arrangements are …
59Field electron emission — It is requested that a diagram or diagrams be included in this article to improve its quality. For more information, refer to discussion on this page and/or the listing at Wikipedia:Requested images. Field emission (FE) (also known as field… …
60Negative feedback amplifier — Figure 1: Ideal negative feedback model A negative feedback amplifier (or more commonly simply a feedback amplifier) is an amplifier which combines a fraction of the output with the input so that a negative feedback opposes the original signal.… …
