ponasteronen.

Brit.

/ˌpəʊnəˈstɪərəʊn/,

/pəʊˈnastərəʊn/, U.S.

/poʊˈnæstəˌroʊn/

Origin: A borrowing from Latin, combined with an English element. Etymons: Latin Podocarpus , nakaii , -sterone comb. form.

Etymology: < po- (in scientific Latin Podocarpus: see podocarp n.) + na- (in scientific Latin nakaii, specific epithet (1916: see below; < the name of T. Nakai (1882–1952), Japanese botanist)) + -sterone comb. form. So called because the first ponasterones were isolated from the Japanese podocarp Podocarpus nakaii (valid publication of the species name: B. Hayata Icones Plantarum Formosanarum (1916) VI. 66).

Biochemistry.

Any of a group of steroids which act as ecdysones in various arthropods and are found primarily in certain plants, where they have a protective role against insects.

ΚΠ

1966 K. Nakanishi et al. in Jrnl. Chem. Soc.: Chem. Communications 28 Dec. 915/1 We have isolated four active substances, ponasterones -A, -B, -C and -D from Podocarpus nakaii.

1978 Nature 5 Oct. 366/1 A plant ecdysone, ponasterone A, has been found with about 50 times the activity of the insect hormone β-ecdysone.

1988 Plant Physiol. 86 iv. Suppl. 43/1 As the shoot tissues mature the ratio of ponasterone A to ecdysterone increases.

1999 Amer. Zoologist (Nexis) 39 513 In this crab, the Y-organs produce at least two steroids..that are released and converted peripherally to Ponasterone A (PA) and 20-hydroxyecdysone (20HE) respectively.

This is a new entry (OED Third Edition, December 2006; most recently modified version published online March 2022).

单词	ponasterone
释义	ponasteronen. Brit. /ˌpəʊnəˈstɪərəʊn/, /pəʊˈnastərəʊn/, U.S. /poʊˈnæstəˌroʊn/ Origin: A borrowing from Latin, combined with an English element. Etymons: Latin Podocarpus , nakaii , -sterone comb. form. Etymology: < po- (in scientific Latin Podocarpus: see podocarp n.) + na- (in scientific Latin nakaii, specific epithet (1916: see below; < the name of T. Nakai (1882–1952), Japanese botanist)) + -sterone comb. form. So called because the first ponasterones were isolated from the Japanese podocarp Podocarpus nakaii (valid publication of the species name: B. Hayata Icones Plantarum Formosanarum (1916) VI. 66). Biochemistry. Any of a group of steroids which act as ecdysones in various arthropods and are found primarily in certain plants, where they have a protective role against insects. ΚΠ 1966 K. Nakanishi et al. in Jrnl. Chem. Soc.: Chem. Communications 28 Dec. 915/1 We have isolated four active substances, ponasterones -A, -B, -C and -D from Podocarpus nakaii. 1978 Nature 5 Oct. 366/1 A plant ecdysone, ponasterone A, has been found with about 50 times the activity of the insect hormone β-ecdysone. 1988 Plant Physiol. 86 iv. Suppl. 43/1 As the shoot tissues mature the ratio of ponasterone A to ecdysterone increases. 1999 Amer. Zoologist (Nexis) 39 513 In this crab, the Y-organs produce at least two steroids..that are released and converted peripherally to Ponasterone A (PA) and 20-hydroxyecdysone (20HE) respectively. This is a new entry (OED Third Edition, December 2006; most recently modified version published online March 2022). < n.1966
随便看	tricrural trictrac trictracs tricube tricurvate tricuspid tricuspid murmur trisdiapason trisect trisected trisecting trisection trisections trisector trisectors trisectory trisectrices trisectrix trisectrixes trisects triseme trisemes trisemic trisensory trisepalous