Primary biodegradation definition

Primary biodegradation means the structural change (transformation) of a surfactant by micro- organisms resulting in the loss of its surface-active properties due to the degradation of the parent substance and consequential loss of the surface-active property as measured by test methods listed in Annex II of the consolidated version of Regulation (EC) No 648/2004.
Primary biodegradation means the structural change (transformation) of a surfactant by micro-organisms resulting in the loss of its surface-active properties due to the degradation of its structure;

Examples of Primary biodegradation in a sentence

  • Product: Physico-chemical removabil-ity Components:Akyl naphthalene sulfonic acid, calcium salt (CAS-No. confidential): Biodegradability:Remarks: No data available Poly Alpha Olefin (PAO): Biodegradability:Test Type: Primary biodegradation Inoculum: activated sludgeResult: Not readily biodegradable.

  • Product: Physico-chemical removabil-ity Components:1,3,4-Thiadiazolidine-2,5-dithione, reaction products with hydrogen peroxide and tert- dodecanethiol: Biodegradability:Test Type: Primary biodegradation Inoculum: activated sludgeResult: Not readily biodegradable.

  • Primary biodegradation may also be calculated from supplemental chemical analysis for parent compound made at the beginning and end of incubation.

  • Primary biodegradation (half-life) is very important but very difficult to predict.

  • Product: Physico-chemical removabil-ity Components:Polysulfides, di-tert-dodecyl: Biodegradability:Test Type: Primary biodegradation Result: Not readily biodegradable.

  • The biographies of the independent reviewers have been included (Appendix 2).

  • A Fixed-Term Appointment will be renewed in accordance with the provisions of UNHCR’s Policy on the Administration of Fixed-Term Appointments.55 The extension of a Fixed Term Appointment in respect of a staff member serving on short-term assignment will be aligned with the duration of that assignment, except when staff member qualifies for a three-year Fixed-Term Appointment.

  • Product: Physico-chemical removabil-ity Components:Dec-1-ene, dimers, hydrogenated: Biodegradability:Result: Not rapidly biodegradable Dec-1-ene, homopolymer, hydrogenated: Biodegradability:Test Type: Primary biodegradation Inoculum: activated sludgeResult: Not readily biodegradable.

  • Biodegradability : Test Type: Primary biodegradation Inoculum: activated sludge Biodegradation: >= 60 % Exposure time: 28 dMethod: OECD Test Guideline 301F Physico-chemical removabil- ity: Remarks: No data available Components:octadecyl 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate:Biodegradability : Result: Not readily biodegradable.Remarks: According to the results of tests of biodegradability this product is not readily biodegradable.

  • Results: Linear model prediction: Biodegrades fastNon-linear model prediction: Biodegrades fast Ultimate biodegradation timeframe: Days-Weeks Primary biodegradation timeframe: DaysMITI linear model prediction: Biodegrades fast MITI non-linear model prediction: Biodegrades fast Reliability: (2) Reliable with restriction: Results are estimated Reference: Boethling, R.S., P.H. Howard, W.

Related to Primary biodegradation

  • Biodegradable means degradable through a process by which fungi or bacteria secrete enzymes to convert a complex molecular structure to simple gasses and organic compounds.

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  • Aerosol coating product means a pressurized coating product containing pigments or resins that dispenses product ingredients by means of a propellant, and is packaged in a disposable can for hand-held application, or for use in specialized equipment for ground traffic/marking applications.

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  • Precursor means any chemical reactant which takes part at any stage in the production by whatever method of a toxic chemical. This includes any key component of a binary or multicomponent chemical system.

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