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  • 1
    Publikationsdatum: 2022-05-25
    Beschreibung: Author Posting. © The Author(s), 2015. This is the author's version of the work. It is posted here by permission of Elsevier for personal use, not for redistribution. The definitive version was published in Marine Pollution Bulletin 105 (2016): 558-565, doi:10.1016/j.marpolbul.2015.11.024.
    Beschreibung: Coral reef communities between 26.8°N and 18.6°N latitude in the Saudi Arabian Red Sea were surveyed to provide baseline data and an assessment of fine-scale biogeography of communities in this region. Forty reefs along 1100 km of coastline were surveyed using depth-stratified visual transects of fish and benthic communities. Fish abundance and benthic cover data were analyzed using multivariate approaches to investigate whether coral reef communities differed with latitude. A total of 215 fish species and 90 benthic categories were recorded on the surveys. There were no significant differences among locations in fish abundance, species richness, or among several diversity indices. Despite known environmental gradients within the Red Sea, the communities remained surprisingly similar. The communities do, however, exhibit subtle changes across this span of reefs that likely reflect the constrained distributions of several species of reef fish and benthic fauna.
    Beschreibung: This research was supported by a KAUST Competitive Research Grant (URF/1/1389-01-01) and baseline research funds to MLB, as well as WHOI-KAUST Special Partnership Awards (USA-00002 and KSA-00011) to SRT.
    Schlagwort(e): Benthic cover ; Biogeography ; Coral reef fishes ; Dissimilarity ; Red Sea
    Repository-Name: Woods Hole Open Access Server
    Materialart: Preprint
    Format: application/pdf
    Format: application/vnd.ms-excel
    Standort Signatur Erwartet Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    s.l. : American Chemical Society
    Journal of the American Chemical Society 116 (1994), S. 5295-5297 
    ISSN: 1520-5126
    Quelle: ACS Legacy Archives
    Thema: Chemie und Pharmazie
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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  • 3
    Digitale Medien
    Digitale Medien
    s.l. : American Chemical Society
    Analytical chemistry 30 (1958), S. 1935-1941 
    ISSN: 1520-6882
    Quelle: ACS Legacy Archives
    Thema: Chemie und Pharmazie
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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  • 4
    Digitale Medien
    Digitale Medien
    s.l. ; Stafa-Zurich, Switzerland
    Solid state phenomena Vol. 121-123 (Mar. 2007), p. 1429-1432 
    ISSN: 1662-9779
    Quelle: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Thema: Physik
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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  • 5
    ISSN: 1420-9098
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Beschreibung / Inhaltsverzeichnis: Resume L'électrophorèse en gel d'amidon de 8 enzymes codées par différents loci a permis de déduire, chez l'Abeille primitivement eusocialeDialictus zephyrus, les génotypes de 31 fondatrices, apparemment solitaires, et de leur couvain de première génération. 13% des sociétés renfermaient une descendance provenant de plus d'une femelle et 23% la descendance soit de plus d'une femelle, soit d'une seule femelle fécondée à deux reprises. Ainsi, un total de 36% des sociétés apparemment fondées par une femelle unique contenaient des descendants de première génération qui ne pouvaient provenir d'une femelle, fécondée une fois pour toutes.
    Notizen: Summary Genotypes for 31 apparent, single foundresses and their first generation brood in the primitively eusocial sweat beeDialictus zephyrus were inferred from starch-gel electrophoresis of 8 enzyme coding loci. Thirteen percent of the colonies contained the progeny of more than one female, and an additional twenty-three percent contained the progeny of either more than one female or a single, twice-mated female. Thus a total of thirty-six percent of colonies apparently founded by a single female contained first generation brood which were not the progeny of one, singly-mated female.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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  • 6
    Digitale Medien
    Digitale Medien
    Springer
    Insectes sociaux 38 (1991), S. 171-188 
    ISSN: 1420-9098
    Schlagwort(e): Halictidae ; Lasioglossum ; colony dynamics
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Summary Proximate control of colony dynamics was studied in the primitively eusocial halictine beeLasioglossum (Dialictus) zephyrum using allozyme markers. The results indicate that workers produce on average 15% of the male brood (range=0–50%) in small laboratory colonies made up of unrelated, single-generation, uninseminated females. This proportion is not influenced by colony size, but is influenced by the relative size of the queen. Large queens are more successful in dominating their workers than are small queens, the queen being defined as the female that is the mother of most of the brood produced in the colony. Older and larger females tend to become queens. Thus, while small differences in age (up to 4 days) influence which female becomes a queen, her ability to control her workers is primarily influenced by her relative size. The proportion of reproduction that is co-opted by the queen is negatively correlated with colony reproductivity (the number of males/day/female). Colony reproductivity is also negatively correlated with the standard deviation in size among females.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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  • 7
    ISSN: 1432-1041
    Schlagwort(e): Monoamine oxidase ; irreversible enzyme inhibition ; benmoxine ; duration of inhibition in man ; methods for MAO determination in man ; multiplicity of deaminating enzymes
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie , Medizin
    Notizen: Summary Investigations with an irreversible monoamine oxidase (MAO) inhibitor were performed in man in order to correlate biochemical, pharmacological, and clinical changes during and after MAO inhibition. — Six healthy volunteers were treated with the hydrazine MAO inhibitor benmoxine (1-α-methylbenzyl-2-benzoyl hydrazine) in a dosage of either 75 mg/day for 4 weeks, or with 75 mg/day for 2 weeks, and 100 mg and 125 mg per day during the 3rd and 4th week respectively. — 1. Inhibition of plasma MAO occurred rapidly and was almost complete after one week of treatment with 75 mg/day benmoxine. After discontinuation of the treatment, there was rapid normalization of enzyme activity (within one week) and a subsequent rebound. — 2. Inhibition of blood platelet MAO was also rapid and almost total, but the return to normal did not occur earlier than 3 weeks after cessation of the drug. — 3. The serotonin content of blood platelets increased cumulatively and dose-dependently during the treatment period. Normal serotonin levels were found 2–3 weeks after treatment was discontinued. — 4. Urinary tryptamine excretion was not increased when the lower benmoxine dose was given. An immediate threefold rise was observed with the higher dosage. This effect disappeared after about one week. — 5. Due to progressive MAO inhibition, the blood pressure rising effect of intravenously infused tyramine also increased cumulatively. This effect was dose-dependent: three- and fivefold potentiation were found after 4 weeks of treatment with the two different dosage schedules. — The mydriatic response to tyramine instilled into the conjunctival sac was also enhanced after 4 weeks of treatment. 6. Cardiovascular dysregulation could be detected (Schellong test, after exercise) only when the higher doses of inhibitor were given, i.e., after 4 weeks, when the pressure response to tyramine was increased to about 5 fold. — It is concluded that only the combined application of several methods (biochemical, pharmacological and clinical investigation procedures) permit definite conclusions to be drawn about the time course and extent of MAO inhibition in man.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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  • 8
    ISSN: 1432-1041
    Schlagwort(e): Prenylamine in man ; catecholamines ; urinary metabolites ; cardiovascular effects ; directly and indirectly acting sympathomimetics
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie , Medizin
    Notizen: Summary The effect of prenylamine on the cardiovascular effects of intravenously infused directly and indirectly acting sympathomimetic amines was investigated in 5 healthy volunteers. — 1. After oral administration of 180 mg/day prenylamine for 9 days, the pressor effect of the indirect sympathomimetic tyramine (3 mg/min over 6 min) was markedly diminished. — 2. Under the same experimental conditions the rise in blood pressure after i.v. infusion of 15 µg/min noradrenaline and 30 µg/min adrenaline, resp., for 6 min, was significantly increased. — 3. Treatment for 9 days with prenylamine produced a relative prolongation of the pressor effects of noradrenaline and adrenaline. Prolongation of the pressor action of the indirectly acting sympathomimetic tyramine was also observed despite a diminution in its maximum pressor effect. — 4. The urinary excretion of catecholamines (noradrenaline plus adrenaline) and their 0-methylated derivatives was significantly enhanced during the administration of prenylamine. Excretion of 3-methoxy-4-hydroxyphenylglycol decreased, whereas vanilmandelic acid and 5-hydroxyindole acetic acid excretion were not significantly affected. — 5. These results are compatible with the assumption that prenylamine in therapeutic doses interferes mainly with the sympathomimetic amine transport mechanisms located in the cytoplasmic membranes of sympathetic nerves and other cells. Our results do not support the assumption of a reserpine-like action of this drug in man.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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  • 9
    Digitale Medien
    Digitale Medien
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 93 (1990), S. 3215-3223 
    ISSN: 1089-7690
    Quelle: AIP Digital Archive
    Thema: Physik , Chemie und Pharmazie
    Notizen: The photodissociation of Kr+n (3≤n≤11) cluster ions is observed for the first time in the 565 to 630 nm wavelength range. Kr+3 has a photodissociation cross section of (8.1±0.8)×10−17 cm2 at 612 nm, while Kr+4 and Kr+5 are found to have larger photodissociation cross sections than Kr+3 with a slightly red-shifted spectrum. Only Kr+ is detected as a photofragment of Kr+3, while in the Kr+n (4≤n≤7) experiments, both Kr+2 and Kr+ photofragments are seen. As size n increases from 7 to 11, Kr+ disappears and Kr+3 appears. Laser power studies show that all are single photon photodissociation processes. For higher order Kr+n clusters (4≤n≤7) the intensity ratio between the two photodissociation products Kr+2 and Kr+ is dependent on the wavelength of the laser light used in the photodissociation, but independent of the polarization direction of the laser. Translational energy analysis of the photofragments is used to investigate the photodissociation mechanisms. In contrast to the photodissociation of Kr+3, where two types of Kr+ photofragments with different values of translational energy release are observed, only one type of Kr+2 photofragment, with zero kinetic energy release is found in the Kr+4 photodissociation. These findings are discussed in terms of the dynamics of photodissociation and possible structures of these cluster ions.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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  • 10
    Digitale Medien
    Digitale Medien
    [s.l.] : Nature Publishing Group
    Nature 185 (1960), S. 729-730 
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] SINCE Sputnik 3 (1958S2) is bearing the end of its life-time, it may be of some interest to give a short account of its progress since the last review1, and to discuss the likelihood of favourable observing periods from the British Isles, before its descent. Throughout May, most of July, and ...
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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