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  • 1995-1999  (1,302)
  • 1990-1994  (812)
  • 1945-1949  (2)
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  • 1
    Monograph available for loan
    Monograph available for loan
    New York [u.a.] : Springer-Verl.
    Associated volumes
    Call number: PIK N 630-95-0393
    In: Ecological studies
    Type of Medium: Monograph available for loan
    Pages: 527 p.
    ISBN: 0387943528 , 3-540-94352-8
    Series Statement: Ecological studies 117
    Location: A 18 - must be ordered
    Branch Library: PIK Library
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  • 2
    Monograph available for loan
    Monograph available for loan
    New York [u.a.] : Springer-Verl.
    Associated volumes
    Call number: PIK N 531-96-0367
    In: Ecological studies
    Type of Medium: Monograph available for loan
    Pages: 201 p.
    ISBN: 3540942157 , 0-387-94215-7
    Series Statement: Ecological studies 107
    Location: A 18 - must be ordered
    Branch Library: PIK Library
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  • 3
    Monograph available for loan
    Monograph available for loan
    Leiden : Backhuys Pub.
    Call number: PIK N 531-98-0185
    Type of Medium: Monograph available for loan
    Pages: 239 p.
    ISBN: 9073348803
    Location: A 18 - must be ordered
    Branch Library: PIK Library
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  • 4
    Call number: SR 90.1036(44)
    In: Boletín
    Type of Medium: Series available for loan
    Pages: 50 S.
    Series Statement: Boletin / Servicio Nacional de Geología y Minería, Chile 44
    Language: Spanish
    Location: Lower compact magazine
    Branch Library: GFZ Library
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  • 5
    ISSN: 1573-2932
    Keywords: atmospheric aerosol ; acid digestion procedure ; atomic absorption spectrometry ; heavy metal ; lead
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract This paper presents a simple, reliable, economical, safe, accurate and reproducible method for atmospheric aerosol lead determination in glass fiber filters, consisting on an acid digestion procedure and atomic absorption spectrometry quantification. The acid digestion is accelerated by the use of a microwave oven with capped Teflon PFA vessels, and a two steps power and time program. The mixture of 10 mL HNO3 and 1 mL HF was selected between many tries, for both economic and environmental reasons. The use of direct standards for quantification is proposed instead of added standards on filters, using background correction (deuterium lamp). The filter lead content quantification was carried out through blank analyses. Lead determinations were carried out then in 2629 samples of atmospheric aerosol at three sampling points in the city of Cartagena (Spain), from 1990 to 1994. We present the annual average of these values for each year and sampling location.
    Type of Medium: Electronic Resource
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  • 6
    ISSN: 1573-2932
    Keywords: atmospheric aerosol ; acid digestion procedure ; atomic absorption spectrometry ; heavy metal ; lead
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract This paper presents a simple, reliable, economical, safe, accurate and reproducible method for atmospheric aerosol lead determination in glass fiber filters, consisting on an acid digestion procedure and atomic absorption spectrometry quantification. The acid digestion is accelerated by the use of a microwave oven with capped Teflon PFA vessels, and a two steps power and time program. The mixture of 10 mL HNO3 and 1 mL HF was selected between many tries, for both economic and environmental reasons. The use of direct standards for quantification is proposed instead of added standards on filters, using background correction (deuterium lamp). The filter lead content quantification was carried out through blank analyses. Lead determinations were carried out then in 2629 samples of atmospheric aerosol at three sampling points in the city of Cartagena (Spain), from 1990 to 1994. We present the annual average of these values for each year and sampling location.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Physiologia plantarum 101 (1997), S. 0 
    ISSN: 1399-3054
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: The effect of NaCl in the culture medium on growth, photosynthesis and cell content of chlorophyll, K+, Na+, Ca2+ and Mg2+ in Euglena gracilis was studied. O2 production, quantum yield of photosystem II (PSII), the non-photochemical quenching of chlorophyll fluorescence (qN) and the chlorophyll alb ratio all diminished by 0.2 M NaCl. Respiration and chlorophyll a and b increased, whereas the photochemical quenching (qp) of chlorophyll fluorescence was not affected by 0.2 M NaCl. Salt stress also induced an increase in cell volume and in K+ and Na+ concentrations, but decreased the concentrations of Ca2+ and Mg2+. Except for a protective effect on O2 production, additional Ca2+ in the culture medium did not attenuate the salt effect on the parameters measured. The addition of HCO3− restored the PSII quantum yield of O2 production in cells grown in high salt. Salt stress promoted a decrease in the apparent rate of quinone A (QA) reduction and an apparent obstruction of QB reduction, which were not prevented by excess HCO3−; the addition of 3-(3,4-dichlorophenyl)-1,1-dimethylurea (DCMU) did not increase chlorophyll fluorescence in salt-grown cells. These results indicate that photosynthesis in Euglena grown under salt stress exhibits: (1) diminution of the HCO3− dependent water-splitting activity of PSII; (2) inhibition of the electron transfer at the quinone pool level; (3) probable increase in thylakoid stacking (as indicated by the effect on the chlorophyll alb ratio); and (4) dissipation of the H+ gradient across the thylakoid membranes (as indicated by the decrease of qN).
    Type of Medium: Electronic Resource
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  • 8
    ISSN: 1572-8889
    Keywords: mating behavior ; courtship ; lek ; mating system ; Mexican fruit fly ; Anastrepha ludens
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Mating behavior and factors affecting mating success of males were studied using wild Anastrepha ludens on a fieldcaged host tree. The most common courtship sequence had five components: (1) male calls from the underside of a leaf, (2) female arrives to the maleoccupied leaf, (3) male orients to female and stops calling, (4) one or both approach to a face-to-face position 1–3 cm apart, and (5) male mounts female after 1–2 s. Courtship behavior was almost identical to that of laboratoryculture flies observed previously under laboratory conditions. Most malefemale encounters occurred at a height of 1–2m, well inside the outer canopy of the tree. Differential mating success by males occurred. No male mated more than once per day, owing possibly to a very short sexual activity period. Factors favoring mating success of males were survival ability and tendency to join male aggregations and to fight other males. Thorax length and age (9–11 days difference) had no effects on male copulatory success. Overall win/loss percentage was not related to mating success because the males that were most successful at mating fought mostly among themselves, driving their win/loss percentage down. However, these successful males (at mating) won most of their fights against less successful males. Results confirmed a lek mating system: males aggregated, called, and defended territories; territories did not contain femalerequired resources; and females exercised mate choice, apparently through selection of sites within leks.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Polar biology 22 (1999), S. 90-92 
    ISSN: 1432-2056
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Stone-collecting behaviour was studied in a colony of chinstrap penguins (Pygoscelis antarctica), to explore the likely importance of nest size. We randomly categorised nests as control or experimental. All nests were weighed at the beginning of the incubation period. In the experimental nests we removed stones constituting 50% of their initial weight, while in the control nests all the stones were returned after weighing. All nests were weighed again either prior to or just after hatching to determine likely changes in their weight. The mean weight increase of experimental nests was significantly higher than the mean weight increase of control nests. Size represents a property of the nest which individuals continuously monitor throughout the incubation/brooding period, reacting to changes in it by appropriate changes in stone-collecting rate.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Mycopathologia 125 (1994), S. 3-5 
    ISSN: 1573-0832
    Keywords: Amanita virosa ; Amatoxin ; Mortal mushroom poisoning
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Mushroom poisonings caused by amatoxins are mostly lethal. Information about mycetisms caused by white species ofAmanita is scarce. The present paper describes a case of mushroom poisoning caused byA. virosa. A prolongated latency period (6–10 hours), followed by cholera-like, improvement and visceral complication phases confirmed the amatoxin poisoning. The consumption of about 3 pounds of the toadstool by seven persons caused the death of five. Two patients survive the ingestion.
    Type of Medium: Electronic Resource
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