نتایج جستجو برای: bee haemolymph

تعداد نتایج: 14532  

Journal: :Annals of the New York Academy of Sciences 2010
Rachael Winfree

Bees pollinate most of the world's wild plant species and provide economically valuable pollination services to crops; yet knowledge of bee conservation biology lags far behind other taxa such as vertebrates and plants. There are few long-term data on bee populations, which makes their conservation status difficult to assess. The best-studied groups are the genus Bombus (the bumble bees), and b...

2009
Hiroshi Izuta Masamitsu Shimazawa Kazuhiro Tsuruma Yoko Araki Satoshi Mishima Hideaki Hara

BACKGROUND Vascular endothelial growth factor (VEGF) is a key regulator of pathogenic angiogenesis in diseases such as cancer and diabetic retinopathy. Bee products [royal jelly (RJ), bee pollen, and Chinese red propolis] from the honeybee, Apis mellifera, have been used as traditional health foods for centuries. The aim of this study was to investigate the anti-angiogenic effects of bee produc...

Journal: :General and comparative endocrinology 2007
Neil Audsley June Matthews Ronald Nachman Robert J Weaver

The degradation of synthetic cydiastatin 4 (ARPYSFGL-amide) and cydiastatin 4 analogues cydiastatin 4alpha (PPPPPARPYSFGL-amide) and cydiastatin 4beta (PPPPPARPYSF[Acpc]L-amide) by enzymes associated with the midgut and/or haemolymph of the tobacco hawkmoth moth, Manduca sexta was investigated using reversed-phase high performance liquid chromatography (RP-HPLC) combined with matrix assisted la...

Journal: :The Journal of experimental biology 2013
Anders Findsen Jonas Lembcke Andersen Sofia Calderon Johannes Overgaard

Chill tolerance of insects is defined as the ability to tolerate low temperature under circumstances not involving freezing of intracellular or extracellular fluids. For many insects chill tolerance is crucial for their ability to persist in cold environments and mounting evidence indicates that chill tolerance is associated with the ability to maintain ion and water homeostasis, thereby ensuri...

Journal: :Diseases of aquatic organisms 2011
Seila Díaz Tristan Renault Antonio Villalba María Jesús Carballal

Disseminated neoplasia (DN) has been detected in cockles from various beds in Galicia (NW Spain). A study was performed to characterise cockle neoplastic cell ultrastructure and to evaluate the effect of this disease at different severity stages on various haemolymph cell parameters. Examination of cockle neoplastic cells with transmission electron microscopy (TEM) showed round shapes and a lac...

2004
C. M. WILLIAMS

1. Hairworms (phylum Nematomorpha) and mermithid nematodes (phylum Nematoda) have independently evolved almost identical life cycles: both parasites cause their terrestrial arthropod hosts to seek water, required for their aquatic free-living adult stage. Hairworms achieve this by altering host neurotransmitters, but the mechanisms used by mermithids remain unknown. 2. The physiological effects...

Journal: :Journal of insect physiology 2008
Eran Gefen

The osmoregulatory and respiratory responses of male and female Smeringurus mesaensis (Vaejovidae) to prolonged desiccation were measured. No significant effect of sex on mass-loss rates (MLRs) was found. Still, females maintained their haemolymph osmolality when desiccated to 10% mass loss, whereas that of males increased significantly after loss of as little as 5% of initial mass. Females had...

Journal: :The Journal of experimental biology 2013
Austin Browne Michael J O'Donnell

Ammonia is a toxic nitrogenous waste product of amino acid metabolism that may accumulate to high levels in the medium ingested by larvae of the fruit fly Drosophila melanogaster. Here we report measurements of haemolymph NH4(+) concentration and the secretion of NH4(+) by the Malpighian (renal) tubules. Measurement of NH4(+) concentrations in secreted droplets is complicated either by the requ...

Journal: :The Journal of experimental biology 1965
P C Croghan R A Curra A P Lockwood

There has been a considerable amount of work on the electrical potential differences and active transport processes of ions across various vertebrate epithelia (Ussing, i960). Little work of this type has been attempted on invertebrate material. As the crustacean gill epithelium has only a single layer of cells separating the body fluid and the external medium, it should be particularly suitabl...

2014
Rodrigo Cuesta Broderick Crawford Ricardo Soto Fernando Paredes

In this paper, we present a new Artificial Bee Colony algorithm to solve the non-unicost Set Covering Problem. The Artificial Bee Colony algorithm is a recent metaheuristic technique based on the intelligent foraging behavior of honey bee swarm. Computational results show that Artificial Bee Colony algorithm is competitive in terms of solution quality with other metaheuristic approaches for the...

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