...Theanuga Chandrapalan; Raymond W. M. Kwong ABSTRACT Trace metals such as iron, copper, zinc and manganese play essential roles in various biological processes in fish, including development, energy metabolism and immune response. At embryonic stages, fish obtain essential metals primarily from...

... composed of parasitoid and pollinator fig wasps. First, we show that parasitoid ovipositor tips have teeth-like structures, preferentially enriched with zinc, unlike the smooth morphology of pollinator ovipositors. We describe sensillae present on the parasitoid ovipositor tip that are likely to aid...

...Jessica C. Lye; Christopher D. Richards; Kesang Dechen; David Paterson; Martin D. de Jonge; Daryl L. Howard; Coral G. Warr; Richard Burke SUMMARY The heavy metal zinc is an essential component of the human diet and is incorporated as a structural component in up to 10% of all mammalian proteins...

.... * Author for correspondence (e-mail: [email protected] ) 21 5 2009 2009 BCECF intracellular pH membrane voltage microelectrodes transepithelial voltage serotonin zinc The anterior midgut (anterior stomach) of the larval mosquito is responsible for generating a luminal...

.... * Author for correspondence (e-mail: [email protected] ) 3 11 2008 2009 larval mosquito midgut alkalinization H + V-ATPase proton electrochemical gradient anion exchanger Na + /H + exchanger H + channel DIDS amiloride ouabain zinc The V-type H + ATPase...

..., possibly by crosslinking other polymers in the gel. This study investigates the role of metals in the action of these glue proteins. Atomic absorption spectrometry showed that glue from the slug Arion subfuscus contains substantial quantities of zinc (46±7 p.p.m. and 189±80 p.p.m. in two different sets...

... biological materials nonoindentation histidine zinc Like their man-made counterparts, hardened biological materials are tailored to perform given functions. Whether used for support (bone and cuticle), armor (shell and cuticle), or as tools (teeth and stingers), the evolution of hardened materials...

...Erene Kefaloyianni; Eleni Gourgou; Vanessa Ferle; Efstathios Kotsakis; Catherine Gaitanaki; Isidoros Beis SUMMARY We investigated the effects of various heavy metals such as copper, zinc and cadmium, as well as acute thermal stress, on the signalling mechanisms involved in the protection...

...-glycyl-sarcosine and 65 Zn 2+ . Mucosa to serosa (M→S) flux of each radiolabelled substrate was measured by the rate of isotope appearance in the physiological saline bathing the tissue on the serosal surface. Addition of 1–50 μmol l –1 zinc to the luminal solution containing 1–50 μmol l –1 3 H- l...

...E. David Thompson; Gregory D. Mayer; Patrick J. Walsh; Christer Hogstrand SUMMARY Female squirrelfish (Holocentridae) accumulate higher concentrations of hepatic zinc than any other known organism. In the liver cells, up to 70% of zinc is bound to metallothionein (MT), which is expressed...

...Chris N. Glover; Christer Hogstrand SUMMARY The composition of the intestinal lumen is likely to have considerable influence upon the absorption, and consequently the nutrition and/or toxicity, of ingested zinc in aquatic environments, where zinc is both a nutrient and a toxicant of importance...

...) decreased by each metal. However, if a 30 min pre-incubation period with each metal was used before incubation of the vesicles with amino acid and metal, a significant ( P <0.05) enhancement of L-[ 3 H]proline transport occurred. Zinc was the most stimulatory metal of those tested. Proline influxes (1.0...

.... * e-mail: [email protected] 17 3 1998 12 5 1998 © The Company of Biologists Limited 1998 fish rainbow trout Oncorhynchus mykiss zinc calcium influx uptake acclimation regulation branchial gill In several recent studies, it has been suggested that Zn...

...Christer Hogstrand; Nancy J. Gassman; Bilyana Popova; Chris M. Wood; Patrick J. Walsh ABSTRACT It is well known that zinc is an essential micronutrient and, as a rule, organisms keep relatively constant low levels of zinc to maintain cellular functions. The squirrelfish family (Holocentridae...

... to exhibit a molecular component recognized by the crustacean antibody that may imply a similar epitope in the two animals. 4 4 1995 ©The Company of Biologists Limited 1995 brush-border membrane calcium zinc antiport electrogenic Ca 2+ /H+ exchange channel 2Na + /1H + exchange...

... U -test was used to detect differences between Zn 2+ -exposed fish and controls in tissue levels of copper, zinc, MT and total RNA, Zn 2+ influx and protein synthesis rate. Groups were considered significantly different at P <0.05. In the acute toxicity tests, the groups were considered...

... reidi sulphide uptake carbon fixation sulphide concentration sulphide loss chemoautotrophic symbiosis hydrogen sulphide zinc endosymbiosis thiosulphate ribulose-bisphosphate carboxylase Vesicomyid clams are found in many deep-sea reducing environments including hydrothermal vents...

.... ( 1984 ). Ionic Channels of Excitable Membranes . Sunderland, MA : Sinauer Associates Inc . Kawa , K. ( 1979 ). Zinc-dependent action potentials in giant neurons of the snail, Euhadra quaestia . J. Membr. Biol . 49 , 325 – 344 . 10.1007/BF01868990 Mahaut-Smith , M...

... an increase in the number of the gill chloride cells. * Present address: Departament de Biologia, Facultat de Veterinària, Universitat Autónoma de Barcelona, J3ellaterra, Barcelona, Spain. 28 06 1982 13 07 1982 © 1983 by Company of Biologists 1983 Copper zinc chloride...