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2. Polymer stabilizer - Wikipedia

   en.wikipedia.org/wiki/Polymer_stabilizer

   Light stabilizer are used to inhibit polymer photo-oxidation, which is the combined result of the action of light and oxygen. Like autoxidation this is a free radical process, hence the antioxidants described above are effective inhibiting agents, however additional classes of additives are also beneficial, such as UV absorbers, quenchers of ...

3. Long-acting reversible contraceptives - Wikipedia

   en.wikipedia.org/wiki/Long-acting_reversible...

   Long-acting reversible contraceptives (LARC) are methods of birth control that provide effective contraception for an extended period without requiring user action. They include hormonal and non-hormonal intrauterine devices (IUDs) and subdermal hormonal contraceptive implants.

4. Dispersion polymerization - Wikipedia

   en.wikipedia.org/wiki/Dispersion_polymerization

   In polymer science, dispersion polymerization is a heterogeneous polymerization process carried out in the presence of a polymeric stabilizer in the reaction medium. . Dispersion polymerization is a type of precipitation polymerization, meaning the solvent selected as the reaction medium is a good solvent for the monomer and the initiator, but is a non-solvent for the po

5. Vas-occlusive contraception - Wikipedia

   en.wikipedia.org/wiki/Vas-occlusive_contraception

   An intravasal control valve is a reversible valve implanted in the vas deferens with the ability to either inhibit or permit sperm passage depending on the position of the device. Bionyx has developed a T-shaped intravasal control valve composed of gold and stainless steel for use in humans. [ 5 ]

6. Hindered amine light stabilizers - Wikipedia

   en.wikipedia.org/wiki/Hindered_amine_light...

   Hindered amine light stabilizers (HALS) are chemical compounds containing an amine functional group that are used as stabilizers in plastics and polymers. [1] These compounds are typically derivatives of tetramethylpiperidine and are primarily used to protect the polymers from the effects of photo-oxidation; as opposed to other forms of polymer degradation such as ozonolysis.

7. Comparison of birth control methods - Wikipedia

   en.wikipedia.org/wiki/Comparison_of_birth...

   Effectiveness of contraceptive methods with respect to birth control. Only condoms are useful to prevent sexually transmitted infections. There are many methods of birth control (or contraception) that vary in requirements, side effects, and effectiveness. As the technology, education, and awareness about contraception has evolved, new ...

8. Ethinylestradiol/etonogestrel - Wikipedia

   en.wikipedia.org/wiki/Ethinylestradiol/etonogestrel

   The break week is comparable to the placebo week for combined oral birth control pills ("the Pill"), and the birth control effect is maintained during this period. Extended use regimens (seven-week, quarterly, or annual) involving back-to-back use of (2, 4, or 17) rings have been studied in clinical trials, but are not currently approved. [7 ...

9. Combined hormonal contraception - Wikipedia

   en.wikipedia.org/wiki/Combined_hormonal...

   Combined hormonal contraception (CHC), or combined birth control, is a form of hormonal contraception which combines both an estrogen and a progestogen in varying formulations. [ 1 ] [ 2 ] The different types available include the pill , the patch and the vaginal ring , which are all widely available, [ 3 ] and an injection , which is available ...