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Showing 1 to 12 of 201 entries
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Identification of new sesquiterpenoids in cephalic secretion of cuckoo bee,Nomada lathburiana (Apoidea, Anthophoridae).

Journal of chemical ecology

Francke W, Krohn S, Tengö J.
PMID: 24258806
J Chem Ecol. 1991 Mar;17(3):557-66. doi: 10.1007/BF00982126.

A series of new sesquiterpene ketones and norsesquiterpene ketones could be identified from the cephalic secretion of females of the cuckoo bee,Nomada lathburiana (K.). The major component proved to be 2,6,10-trimethylundeca-(5E)-2,5,9-trien-4-one. Large amounts of high-boiling-point straight-chain hydrocarbons serve as...

Intranidal worker reactions to volatile compounds identified from cephalic secretions in the stingless bee,Scaptotrigona postica (Hymenoptera, Meliponinae).

Journal of chemical ecology

Engels E, Engels W, Schröder W, Francke W.
PMID: 24301816
J Chem Ecol. 1987 Feb;13(2):371-86. doi: 10.1007/BF01025897.

From pentane extracts of worker heads of the stingless bee (Scaptotrigona postica), 70 volatile compounds were identified by combined gas chromatographic-mass spectroscopic analyses. A bioassay was developed to evaluate intranidal reactions of workers to synthetic volatiles. Thirty-six of the...

Reply to comment on "Serving Transgender Youth: Challenges, Dilemmas, and Clinical Examples" by Tishelman et al. (2015).

Professional psychology, research and practice

Tishelman AC, Kaufman R, Edwards-Leeper L, Mandel FH, Shumer DE, Spack NP.
PMID: 26858509
Prof Psychol Res Pr. 2015 Aug;46(4):307. doi: 10.1037/pro0000029.

No abstract available.

Pheromones in white pine cone beetle,Conophthorus coniperda (schwarz) (Coleoptera: Scolytidae).

Journal of chemical ecology

Birgersson G, Debarr GL, de Groot P, Dalusky MJ, Pierce HD, Borden JH, Meyer H, Francke W, Espelie KE, Berisford CW.
PMID: 24234016
J Chem Ecol. 1995 Feb;21(2):143-67. doi: 10.1007/BF02036648.

Female white pine cone beetles,Conophthorus coniperda, attacking second-year cones of eastern white pine,Pinus strobus L., produced a sex-specific pheromone that attracted conspecific males in laboratory bioassays and to field traps. Beetle response was enhanced by host monoterpenes. The female-produced...

Chlorosomes of green sulfur bacteria: Pigment composition and energy transfer.

Photosynthesis research

van Noort PI, Francke C, Schoumans N, Otte SC, Aartsma TJ, Amesz J.
PMID: 24310026
Photosynth Res. 1994 Jul;41(1):193-203. doi: 10.1007/BF02184160.

The pigment composition and energy transfer pathways in isolated chlorosomes ofChlorobium phaeovibrioides andChlorobium vibrioforme were studied by means of high performance liquid chromatography (HPLC) and picosecond absorbance difference spectroscopy. Analysis of pigment extracts of the chlorosomes revealed that they...

The effectiveness of interventions in supporting self-management of informal caregivers of people with dementia; a systematic meta review.

BMC geriatrics

Huis In Het Veld JG, Verkaik R, Mistiaen P, van Meijel B, Francke AL.
PMID: 26561236
BMC Geriatr. 2015 Nov 11;15:147. doi: 10.1186/s12877-015-0145-6.

BACKGROUND: Informal caregivers of people with dementia are challenged in managing the consequences of dementia in daily life. The objective of this meta-review was to synthesize evidence from previous systematic reviews about professional self-management support interventions for this group.METHODS:...

[An American idealist].

Tandlakartidningen

Francke OC.
PMID: 4514166
Tandlakartidningen. 1973 May 01;65(9):540-1.

No abstract available.

Insect pheromone biosynthesis: stereochemical pathway of hydroxydanaidal production from alkaloidal precursors in Creatonotos transiens (Lepidoptera, Arctiidae).

Proceedings of the National Academy of Sciences of the United States of America

Schulz S, Francke W, Boppré M, Eisner T, Meinwald J.
PMID: 11607415
Proc Natl Acad Sci U S A. 1993 Jul 15;90(14):6834-8. doi: 10.1073/pnas.90.14.6834.

The mechanism by which the moth Creatonotos transiens produces its male pheromone, (7R)-hydroxydanaidal, from heliotrine, an alkaloidal precursor of opposite (7S) stereochemistry, was investigated. Specifically deuteriated samples of heliotrine and epiheliotrine were prepared and fed to C. transiens larvae,...

The secretion of the ventral glands in Cladius, Priophorus and Trichiocampus sawfly larvae.

Biochemical systematics and ecology

Boevé JL, Heilporn S, Dettner K, Francke W.
PMID: 10913847
Biochem Syst Ecol. 2000 Nov 01;28(9):857-864. doi: 10.1016/s0305-1978(00)00008-9.

The volatile secretion from ventral glands of the larvae of Cladius pectinicornis, Priophorus morio, P. pallipes and Trichiocampus grandis was found to be principally composed of long-chain acetogenins, in majority of the esters and hydrocarbons, with more than 15...

An evaluation of the new home-care needs assessment policy in the Netherlands.

Health & social care in the community

Algera M, Francke AL, Kerkstra A, van der Zee J.
PMID: 12823428
Health Soc Care Community. 2003 May;11(3):232-41. doi: 10.1046/j.1365-2524.2003.00424.x.

The aim of the present study was to describe the realisation of the new-style needs assessment in the Netherlands and how it is evaluated. Furthermore, judgements about the new way of assessing (chronic) patients' needs with respect to home...

Enantiomeric composition of the polycyclic musks HHCB and AHTN in different aquatic species.

Chirality

Franke S, Meyer C, Heinzel N, Gatermann R, Huhnerfuss H, Rimkus G, Konig WA, Francke W.
PMID: 10561711
Chirality. 1999;11(10):795-801. doi: 10.1002/(SICI)1520-636X(1999)11:10<795::AID-CHIR10>3.0.CO;2-S.

Synthetic polycyclic musk fragrances are mainly represented by the compounds HHCB (Galaxolide(TM)) and AHTN (Tonalide(TM)). Because of their volume of use and their bioaccumulation potential, there is concern with respect to their environmental safety. HHCB and AHTN are chiral...

Investigation of iron oxide nanoparticles by capillary zone electrophoresis.

Talanta

Vanifatova NG, Spivakov BY, Mattusch J, Franck U, Wennrich R.
PMID: 18970027
Talanta. 2005 Apr 30;66(3):605-10. doi: 10.1016/j.talanta.2004.12.016. Epub 2005 Jan 06.

The electrophoretic behavior of gamma-Fe(2)O(3) nanoparticles was studied in aqueous solutions of Na(2)SO(4)-NaOH (pH 10.8) and of Na(2)SO(4)-Na(3)cit (pH 7.1) as running electrolytes. Two electrophoretic zones (smooth and with spikes) due to colloidal and suspended particles of approximately the...

Showing 1 to 12 of 201 entries