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2. List of β-lactam antibiotics - Wikipedia

   en.wikipedia.org/wiki/List_of_β-lactam_antibiotics

   The β-lactam core structures. (A) A penam.(B) A carbapenam.(C) An oxapenam.(D) A penem.(E) A carbapenem.(F) A monobactam.(G) A cephem.(H) A carbacephem.(I) An oxacephem. This is a list of common β-lactam antibiotics—both administered drugs and those not in clinical use—organized by structural class.

3. Beta-lactam antibiotics - Wikipedia

   en.wikipedia.org/wiki/Beta-lactam_antibiotics

   β-lactam antibiotics ( beta-lactam antibiotics) are antibiotics that contain a beta-lactam ring in their chemical structure. This includes penicillin derivatives ( penams ), cephalosporins and cephamycins ( cephems ), monobactams, carbapenems [1] and carbacephems. [2] Most β-lactam antibiotics work by inhibiting cell wall biosynthesis in the ...

4. Beta decay - Wikipedia

   en.wikipedia.org/wiki/Beta_decay

   Description. The two types of beta decay are known as beta minus and beta plus.In beta minus (β −) decay, a neutron is converted to a proton, and the process creates an electron and an electron antineutrino; while in beta plus (β +) decay, a proton is converted to a neutron and the process creates a positron and an electron neutrino. β + decay is also known as positron emission.

5. Cefalexin - Wikipedia

   en.wikipedia.org/wiki/Cefalexin

   Cefalexin, also spelled cephalexin, is an antibiotic that can treat a number of bacterial infections. [4] It kills gram-positive and some gram-negative bacteria by disrupting the growth of the bacterial cell wall. [4] Cefalexin is a β-lactam antibiotic within the class of first-generation cephalosporins. [4]

6. Meropenem - Wikipedia

   en.wikipedia.org/wiki/Meropenem

   Meropenem is bactericidal except against Listeria monocytogenes, where it is bacteriostatic. It inhibits bacterial cell wall synthesis like other β-lactam antibiotics. In contrast to other beta-lactams, it is highly resistant to degradation by β-lactamases or cephalosporinases.

7. Positron emission - Wikipedia

   en.wikipedia.org/wiki/Positron_emission

   Positron emission, beta plus decay, or β+ decay is a subtype of radioactive decay called beta decay, in which a proton inside a radionuclide nucleus is converted into a neutron while releasing a positron and an electron neutrino ( νe ). [1] Positron emission is mediated by the weak force.