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  • 1
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Inorganic chemistry 19 (1980), S. 2551-2556 
    ISSN: 1520-510X
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1520-5835
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Journal of the American Chemical Society 106 (1984), S. 3025-3026 
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Analytical chemistry 52 (1980), S. 375-377 
    ISSN: 1520-6882
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Analytical chemistry 52 (1980), S. 384-384 
    ISSN: 1520-6882
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Analytical chemistry 52 (1980), S. 377-379 
    ISSN: 1520-6882
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Insectes sociaux 31 (1984), S. 408-428 
    ISSN: 1420-9098
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Zusammenfassung 1. Eurhopalothrix heliscata n. sp. ist eine asiatische Vertreterin des wenig bekannten Ameisen-Tribus Basicerotini. Es ist die erste Angehorige dieser Gruppe, die genau unter-sucht wurde. Es erbeutet Termiten, nimmt aber auch einige Insekten als Beute an. Im Vergleich zu vielen anderen Myrmicinen ist ihr soziales Verhalten einfach. 2. E. heliscata ist eine Einzeljagerin. Wenn mehrere Beuteobjekte gefunden werden, konnen Arbeiterinnen Nestgenossinnen rekrutieren; das beschleunigt das Eintragen der Beute. Das fuhrt oft auch zu einer ausgedehnten Erkundung der weiteren Umgebung. 3. Arbeiterinnen erkennen chemisch Material aus der Nahe ihres Nestes. 4. Die Arbeiterinnen sind bemerkenswert thigmotaktisch. Mit ihren keilformigen Kopfen, harten Korpern und kurzen Beinen drucken sie sich in enge Raume. Mit ihren scharfgezahnten Mandibeln ergreifen sie die Extremitaten der Termiten und sie packen die Beute noch fester mit ihren stark sklerotisierten Labra. 5. E. heliscata versammeln sich oft in Gruppen, ohne Brut und weg von der Hauptkolonie. Dieses Bivouac-Verhalten, das die Furagiere über eine weitere Flache verteilt, scheint der Termitenjagd gut angepasst zu sein. 6. Futteraustausch, Eier legende Arbeiterinnen, Alarm-Verteidigungsverhalten und Rekrutierung wahrend Nest-Emigration wurden nicht beobachtet. 7. Im Labornest kampfen die Koniginnen haufig miteinander und zeigen ausgepragtes Dominanzverhalten. 8. Weitere Einzelheiten zum Nest- und Sozialverhalten werden beschrieben (sieheTabelle I).
    Notes: Summary 1. Eurhopalothrix heliscata n. sp. is an Asiatic representative of the little known ant tribe Basicerotini and the first member of the group to be studied intensively. We report evidence that it preys on a variety of termites, but also takes at least some other kinds of insects. Overall, the social behavior is simple relative to that of many other myrmicine ants. 2. Prey are hunted and retrieved singly. But foraging workers are also able to recruit nestmates to the vicinity of groups of prey and as a result accelerate retrieval of termites to the brood chambers. A prolonged exploration of the surrounding area also ensues. 3. With the aid of chemical cues, workers are able to recognize material from the vicinity of their nest. 4. The workers are notably thigmotactic. They use their wedge-shaped heads, hard bodies, and short legs to press into tight spaces. They seize the appendages of termites with their short, sharp-toothed mandibles, clasping these body parts of the prey even more tightly with the aid of their projecting, heavily sclerotized labra. 5. E. heliscata tend to gather in large, broodless groups away from the main part of the colony. This bivouacing behavior, which effectively dispenses the foragers over a wider area, may improve the efficiency of the predation on termites. 6. The workers appear not to practice food exchange, worker oviposition, or alarmdefense behavior, nor do they recruit during colony emigration. 7. Prolonged fighting and dominance-subordinance relations among queens have been observed under laboratory conditions. 8. Other details of nesting behavior and social interactions are described (see,e.g., table I).
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Calcified tissue international 35 (1983), S. 783-790 
    ISSN: 1432-0827
    Keywords: Amorphous calcium phosphate ; Apatite ; Calcification ; Hydrolysis ; Octacalcium phosphate
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine , Physics
    Notes: Summary The hydrolysis of previously prepared amorphous calcium phosphate (ACP) was studied in a solution “saturated” with ACP; this eliminated the initial consumption of acid due to ACP dissolution. The procedure established that conversion of a high-concentration ACP slurry to an apatite involves two processes: the first process consumes acid and indicates the formation of a more acidic calcium phosphate intermediary with the solubility of octacalcium phosphate (OCP); the second process consumes base and indicates the conversion of the intermediary to apatite and, possibly, direct conversion of ACP to apatite. The thermodynamic analysis of the solution composition data suggests that ACP converts into a nonstoichiometric apatite when the OCP-like intermediary is formed, and a stoichiometric apatite is formed when no OCP-like intermediary is involved.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Calcified tissue international 32 (1980), S. 55-62 
    ISSN: 1432-0827
    Keywords: Apatite ; Carbonate apatite ; Hydrolysis ; Impurities ; Octacalcium phosphate ; Sodium ; Tooth enamel
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine , Physics
    Notes: Summary Octacalcium phosphate (Ca8H2(PO4)6·5H2O) is considered to be a precursor in the formation of apatite in bones and teeth; a crucial step for incorporation of impurities appears to occur during its hydrolysis. The present study examines the role that octacalcium phosphate plays in the process of incorporation of carbonate into apatite. Chemical, X-ray diffraction, and infrared techniques were used. When octacalcium phosphate is hydrolyzed in the presence of sodium and carbonate ions in aqueous media, approximately one sodium and one carbonate ion seem to substitute for a calcium and phosphate ion, respectively, in forming apatite, and thea axis is shortened. The infrared spectrum of the product indicates that the carbonate is in the type B site, which is presumed to be a phosphate site. This mechanism is of particular importance since the presence of carbonate in human enamel appears to be related to caries susceptibility. A structural mechanism for the incorporation of impurities during hydrolysis of octacalcium phosphate is presented.
    Type of Medium: Electronic Resource
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  • 10
    ISSN: 1750-3841
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Rockfish fillets were dipped in either distilled deionized water (DDW), a solution of 1% Na4EDTA plus 5 ppm chlortetracycline (CTC) or 1% K-sorbate plus 5 ppm CTC. After dipping, fliets were vacuum packed and stored at 2°C. Samples were evaluated after 0, 3, 7, 10, 14, and 21 days. The sorbate/CTC group differed less from fresh Filets than did the control (fillets dipped in DDW) for all indices measured (plate count, pH, redox potential, and TMA and NH3 concentrations). Fillets treated with EDTA/CTC differed to a greater extent from fresh fillets than the sorbate/CTC group but less than the controls. Results were corroborated by sensory analyses which tested for color, flavor and odor. Fish fillets dipped in a solution of 1% K-sorbate plus 5 ppm CTC retained odor and flavor properties of fresh fillets better than the EDTA/CTC treated fillets after 14 days of storage.
    Type of Medium: Electronic Resource
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