Secondary metabolites are organic compounds that are not directly involved in the normal growth, development, or reproduction of an organism.

* Secondary organic aerosols

* Secondary effects from water column contamination of uptake of heavy metals, DDT and other persistent organic toxins, via food chain uptake and subsequent concentrations of these toxins in higher organisms including humans.

Secondary functional delusional parasitosis occurs when the delusions are associated with a psychiatric condition such as schizophrenia or clinical depression.

Secondary ossification occurs after birth, and forms the epiphyses of long bones and the extremities of irregular and flat bones.

Secondary education occurs mainly during the teenage years.

One such example occurs in Secondary Ion Mass Spectrometry ( SIMS ), where the target sample is sputtered at a constant rate.

Secondary growth occurs at the lateral meristems, namely the vascular cambium and cork cambium.

Secondary endosymbiosis occurs when the product of primary endosymbiosis is itself engulfed and retained by another free living eukaryote.

A subsequent section of Marvin's biography occurs only in the Secondary Phase of the radio series.

Secondary hemostasis occurs simultaneously: Proteins in the blood plasma, called coagulation factors or clotting factors, respond in a complex cascade to form fibrin strands, which strengthen the platelet plug.

Secondary vaginismus occurs when a woman who has previously been able to achieve penetration develops vaginismus.

Secondary spontaneous pneumothorax ( SSP ), by definition, occurs in individuals with significant underlying lung disease.

Secondary spontaneous pneumothorax occurs in the setting of a variety of lung diseases.

Secondary emission occurs at the surface of each dynode.

Raynaud's syndrome, or " Secondary Raynaud's ," occurs secondary to a wide variety of other conditions.

* Secondary hyperalgesia describes pain sensitivity that occurs in surrounding undamaged tissues.

Secondary synthesis from the hexoses by AM occurs in the intraradical mycelium.

Secondary emission still occurs, but the electrons that come from it can no longer reach the screen grid as they have less energy than the primary electrons, and, hence, cannot pass the grounded suppressor grid.

Secondary dentin is formed after root formation is finished and occurs at a much slower rate.

Secondary SOC occurs in older patients in joints previously affected by joint disease such as osteoarthritis.

Secondary structures can also have been formed by diagenesis or the formation of a soil ( pedogenesis ) when a sediment is exposed above the water level.

Secondary flight controls include the rotor transmission clutch, also known as a pre-rotator, which when engaged drives the rotor to start it spinning before takeoff, and collective pitch to reduce blade pitch before driving the rotor.

Passenger services ended in 1929, conversion to standard gauge followed in 1944, when it was renamed the Waynesburg Secondary.

The band formed in 1989 when Jian Ghomeshi ( then going by Jean Ghomeshi ), Murray Foster and Mike Ford, former classmates at the local Thornlea Secondary School and playing in a pub band called The Chia Pets at the time, joined with David Matheson to busk in Toronto.

The college was known as Auckland Teachers College until 1985 when it merged with the Secondary Teachers College to form the Auckland College of Education.

:* Secondary succession, when the substrate has sustained vegetation, as after a fire or flood

Secondary nocturnal enuresis ( SNE ) is when a child or adult begins wetting again after having stayed dry.

It was formed when the former Marlborough Grammar School and Secondary modern school were amalgamated. There is also a junior school, St Peter's and an infants school, St Mary's, which are named after the two churches in Marlborough.

Before Highfields School was founded in 1982, when the tripartite education system in Matlock ended, there were two secondary schools in Matlock ; Charles White Secondary Modern School ( founded in 1956, and named after two local MPs, father and son, the latter of who died in 1956 ) and Ernest Bailey's Grammar School ( founded in 1924 and named after its wealthy founder ).

Secondary, assist Government agencies to cope with ‘ proxy war ’ and other internal threats and provide aid to civil authority when requisitioned for the purpose.

The present system of road classification and numbering began in 1977 when twenty-five National Primary roads and thirty-three National Secondary roads were designated.

Marc Hall v. Durham Catholic School Board began when Oshawa, Ontario's Monsignor John Pereyma Catholic Secondary School asked students attending the prom to submit the names of the guests they intended to bring.

The junior school was relocated to the former Secondary Modern school when a new secondary school, Alderman Peel High School, was built in the late 1960s, part of which is upon the former railway line to the west towards King's Lynn.

Secondary dysmenorrhea is diagnosed when symptoms are attributable to an underlying disease, disorder, or structural abnormality either within or outside the uterus.

Benton was born in Bootle, Lancashire and was educated at the St Monica's Roman Catholic Primary School on Aintree Road and Secondary School in Bootle and the Bootle Municipal Technical College ( called the Hugh Baird College of Further Education since 1974 when after merging with the Art College in 1968 ).

St. George's High School in Vancouver, British Columbia, qualified for the national finals every year from 1989-2007, except in 1994 when Magee Secondary School represented British Columbia.

He first encountered the phenomenon in 1963 in Form 3 of Magamba Secondary School, Tanganyika when freezing ice cream mix that was hot in cookery classes and noticing that they froze before cold mixes.

Secondary action remained legal until 1980, when the Conservative Government of Margaret Thatcher passed the Employment Act 1980 which restricted secondary action.

Secondary TTP is diagnosed when the patient's history mentions one of the known features associated with TTP.

Secondary emission in physics is a phenomenon where primary incident particles of sufficient energy, when hitting a surface or passing through some material, induce the emission of secondary particles.

When he was four he attended the Elizabethville Infant School, later moving to the Elizabethville Elementary School until he was 11, when he was accepted into the Chester-le-Street Secondary School.