• Aucun résultat trouvé

PHEROMONE OF

N/A
N/A
Info
Télécharger
Protected

Academic year: 2022

Partager "PHEROMONE OF "

Copied!
1
0
0

Chargement.... (Voir le texte intégral maintenant)

Texte intégral

(1)

IDENTIFICATION OF

A

TRIGLYCERIDE

(GLYCERYL-1,2-DIOLEATE-3-PALMITATE)

AS

A BROOD

PHEROMONE OF

THE HONEY BEE

(APIS

MELLIFERA

L.)

Identifizierung eines Tri-Glycerids (Glyceryl-1, 2-dioleat-3-palmitat)

als

Brutpheromon

der

Honigbiene (Apis mellifera L.)

Identification

d’un

triglycéride (glyceryl-1, 2-dioléate-3-palmitate)

comme

phéromone

de couvain de l’abeille

(A P is mellifica L.)

N. KOENIGER H. J. VEITH*

Institut for Bienenkunde, Fachbereich Biologie der

J. W. Goethe-Universität. Karl-v.-Frisch-Weg 2

D - 6370 Oberursel I

I

nstitut fiir organische Chemie und Biochemie der Technischen Hochschule D - 6100 Darmstadt

Honey

bees care for their brood in a very

complete

way. At low ambient

temperatures they

incubate the pupae and

regulate

the

temperature

at 35 °C. The

question

how bees

recognize

the brood is still unsolved. When two semi-artificial

queencells consisting

out of natural silk cocoons were offered to a group of 500 hive bees

they regularily

make a choice and

intergrate only

one of the two cells into

their cluster.

The

biological

active fraction was extracted from drone pupae with

diethyle- ther, purified by

HPLC and

analyzed by masspectrometry, ’H-NMR

and IR-

spectroscopy.

Based on these results

Glyceryl-1, 2-dioleate-3-palmitate

was identi-

fied as the main

component

of this fraction.

Synthesized

substance

(7 pg)

offered

on a test cocoon released the

clustering

of the bees around it.

Experiments

on other

substances and a more detailed discussion will be

published

elsewhere.

Références

Télécharger maintenant ( PDF - 1 Page - 45.17 KB )

Documents relatifs

Diagnosis and phenotypic assessment of trimethylaminuria, and its treatment with riboflavin: 1 H NMR spectroscopy and genetic testing

B2 vitamin treatment dramatically improved the unpleasant body odor and the ratio of TMA/Cr vs TMAO/Cr in the urine in the children.. Other patients presented a particular

Photodissociation Spectroscopy of Cold Protonated Synephrine: Surprising Differences Between IR-UV Hole-Burning and IR Photodissociation Spectroscopy of the O-H and N-H modes

3.2.1. Isomer Structures, Energies and Frequencies. The ground state energy and the vibrational frequencies of SyneH + for the syn rotamer, calculated at

Recovering Invisible Signals by Two-Field NMR Spectroscopy

We show that signals of methyl groups that cannot be observed at 14.1 T because of chemical exchange can be recovered by two-field correlation spectroscopy..

THE ACTIVE CENTER OF BACTERIAL CATALASE INVESTIGATED BY MÖSSBAUER SPECTROSCOPY

L’archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des

Identification of the fragment of the 1-methylpyrene cation by mid-IR spectroscopy

Table 1: Experimental mid-IR band positions recorded for C 17 H + 11 and calculated positions for PyrCH + 2 and PyrC + 7 isomers (see Figure 2) obtained in the present work.. * –

Phylogeography and Molecular Evolution of Potato virus Y

These different subregions supporting positive selection in the two observed internal branches included three covarying positions (121, 214 and 241), and it was particularly

أثر الإبتكار التسويقي على الأداء التنافسي للمؤسسة الإنتاجية في مجال الهواتف الذكية دراسة حالة سامسونج؛ كوندور؛ هواوي؛ لينوفو

2 Richard leifer and oth, Radical innovation: How mature companies can outsmart upstarts, Harvard business school press, 2001. ريدلما بتك ،تاصلاخ ةلمج ،ة

Structure Determination in Ordered and Disordered Solids by High-Resolution NMR Spectroscopy

Magic-angle spinning alone does not average completely the strong dipolar couplings present among the proton network and does not yield very high-resolution proton spectra, even