Zobrazeno 1 - 7
of 7
pro vyhledávání: '"David L. Whitehead"'
Autor:
David L. Whitehead
Publikováno v:
International Journal of Tropical Insect Science. 30:171-181
The presence of ecdysteroids during the larval life cycle and in the abdomens and ovaries of pregnant tsetse flies was established using radioimmunoassay. The hormone titre rises on day 9 of the larval life cycle 2–3 days after the hardening of the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3231d514827aceb38b59a1aa79a4dca2
https://doi.org/10.1017/s1742758410000305
https://doi.org/10.1017/s1742758410000305
Autor:
Catherine M Temple, David L Whitehead
Publikováno v:
Journal of the Science of Food and Agriculture. 58:149-152
This communication describes the routine use of small inexpensive C18 cartridges for rapid separation and accurate measurement of both thearubigins (TR) and theaflavins (TF) in a liquor brewed from black tea. The slow, traditional method overestimate
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4dd5d8d7b694bac8c1a59e3ee52c83d2
https://doi.org/10.1002/jsfa.2740580126
https://doi.org/10.1002/jsfa.2740580126
Publikováno v:
International Journal of Tropical Insect Science. 2:181-187
The sex-stimulant contact pheromone present in the cuticle of female tsetse Glossina pallidipes Austen has been extracted with hexane, separated by preparative gas chromatography and identified by mass spectrometry. The aphrodisiac, consisting of 13,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c186a75546b8f8d73d86af73bb6feedf
https://doi.org/10.1017/s1742758400000990
https://doi.org/10.1017/s1742758400000990
Autor:
David L. Whitehead
Publikováno v:
International Journal of Tropical Insect Science. 1:281-288
The phytosterols inokosterone, makisterone A, ecdysterone and ecdysone were effective growth regulators and abortifacients (70%) at estimated doses of 1.4 × 10−4 M, 6.8 × 1−4 M, 5.2 × 10−5 M, and 7.8 × 10−5 M respectively when fed to fema
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::15aeac39ec169c5e996dfedb5fce4f86
https://doi.org/10.1017/s1742758400000539
https://doi.org/10.1017/s1742758400000539
Autor:
Richard R. Mills, David L. Whitehead
Publikováno v:
Journal of Insect Physiology. 16:331-340
The content of diuretic hormone (DH), antidiuretic hormone (ADH), and tanning hormone (bursicon) in the haemolymph have been determined for several periods during the moulting process in Periplaneta americana. ADH builds up immediately prior to the e
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0b5f93d72c85dad0ed45c746ce7a49c4
https://doi.org/10.1016/0022-1910(70)90175-7
https://doi.org/10.1016/0022-1910(70)90175-7
Publikováno v:
Nature. 269:238-239
DURING the growth and development of insects there are rapid changes in the concentrations of the moulting hormones (ecdysteroids). In the locust Locusta migratoria the rate of excretion of the moulting hormones is one factor which regulates the ecdy
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0f74a1d8a7bee6d34325570f115981f6
https://doi.org/10.1038/269238a0
https://doi.org/10.1038/269238a0
Autor:
David L. Whitehead
Publikováno v:
Nature. 306:540-540
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a813846011ddceac6c7c78fe1bcfa58a
https://doi.org/10.1038/306540a0
https://doi.org/10.1038/306540a0