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  • 11
    Electronic Resource
    Electronic Resource
    PCBs and Organochlorines in Tissues of Silverside (Odontesthes bonariensis) from a Coastal Lagoon in Argentina (2000)
    Springer
    Archives of environmental contamination and toxicology 38 (2000), S. 202-208 
    Details
    ISSN: 1432-0703
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Notes: Abstract. A freshwater fish species, silverside (Odontesthes bonariensis) from Mar Chiquita coastal lagoon, Argentina, was analyzed for concentrations of several organochlorine pesticides (OCs) and polychlorinated biphenyls (PCBs) in liver, gonads, mesenteric fat and muscle, and the contents of the digestive tract over several stages of sexual maturation. PCBs and OCs were detected at ng/g concentrations (wet weight) in pooled samples, with levels generally in the order of fat 〉 liver 〉 gonad 〉 muscle, reflecting the differences in tissue lipid content. Lipid-normalized concentrations of the analytes were relatively consistent among tissues, except for significantly higher concentrations of PCBs (e.g., 447.7 ng/g lipid wt) in the ovaries of female silverside. DDT and its metabolites, γ-HCH, and several insecticides from the cyclodiene class, including endosulfan and endosulfan sulfate, were the predominant OCs in fish tissues and the contents of the digestive tract, reflecting recent and past pesticide use in this region. The ratio of OCs to PCBs in all tissues was 〉1; consistent with contamination of the region with OC pesticides. However, PCBs were dominated by penta- and hexachlorobiphenyls, which is consistent with direct (i.e., nonatmospheric) inputs. Biomagnification of penta- and hexachlorobiphenyl PCB congeners was noted in fish tissues relative to the contents of the digestive tract. Total OC and PCB concentrations in the ovaries and muscle of silverside were below concentrations associated with reproductive impairment in fish or the limits for human consumption, respectively.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002449910027
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  • 12
    Electronic Resource
    Electronic Resource
    Mating behavior and male mating success in wildAnastrepha Ludens (Diptera: Tephritidae) on a field-caged host tree (1991)
    Springer
    Journal of insect behavior 4 (1991), S. 471-487 
    Details
    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
    URL: http://dx.doi.org/10.1007/BF01049332
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  • 13
    Electronic Resource
    Electronic Resource
    Plant biomass and fruit yield induction by Ti(IV) in P-stressed pepper crops (1995)
    Springer
    Nutrient cycling in agroecosystems 43 (1995), S. 131-136 
    Details
    ISSN: 1573-0867
    Keywords: phosphorus ; titanium ; fertilizer efficiency ; plant nutrition
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract To study the titanium effect on P nutrition, a greenhouse experiment withCapsicum annuum L., cv. Bunejo plants growing under differential P fertilization was conducted. All the plants were grown under identical conditions and they only differred in the P fertilization and in Ti supply. Plant biomass production of the Ti-untreated plants was affected by the diminution of the P-feed, but the plants growing under the lowest P supply did not showed any deficiency symptom during the crop cycle. All the Ti-treated plots showed a significative increase of the plant biomass against their corresponding untreated references. The biomass enhancement was mainly caused by the increase of the fruit yield with an absolute enhancement of 62% in the plants growing under the lowest P feed, and of 45% in the plants with a complete P support.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00747692
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  • 14
    Electronic Resource
    Electronic Resource
    Multiple fatal mycetism caused byAmanita virosa in Mexico (1994)
    Springer
    Mycopathologia 125 (1994), S. 3-5 
    Details
    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
    URL: http://dx.doi.org/10.1007/BF01103968
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  • 15
    Electronic Resource
    Electronic Resource
    Harris lines and ethanol consumption during growth period (1993)
    Springer
    International journal of anthropology 8 (1993), S. 21-25 
    Details
    ISSN: 1824-3096
    Keywords: Ethanol consumption Harris lines
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Harris lines represent episodes of growth arrest followed by recovery, thus reflecting episodes of mismatched imbalance between energy intake and energy expenditure. Consumption of ethanol during the growth period — formerly extended in our wine-producing rural areas- may lead to such a situation, due at least in part to the energy-wasteful MEOS-linked ethanol metabolism. Based on these facts, in the present study we have analysed the relationship between ethanol intake during growth period and the presence of Harris lines in the right tibia in 100 consecutive adult patients admitted to our hospitalization unit. Early ethanol consumption was strongly related with the presence of two or more, and three or more Harris lines, so that ethanol consumption should be considered in the differential diagnosis of Harris lines, and conversely, the presence of Harris lines point to ethanol consumption during growth period. This association was independent from coexisting starvation and/or illness.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02447639
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  • 16
    Electronic Resource
    Electronic Resource
    Humoral and cellular immune responses to experimental Fasciola hepatica infections in goats (1997)
    Springer
    Parasitology research 83 (1997), S. 680-686 
    Details
    ISSN: 1432-1955
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Humoral and cellular immune responses to Fasciola hepatica excretory-secretory products (ESPs) in primary and secondary experimental infections in goats were studied. Primary infection induced the development of chronic subclinical fascioliasis that did not affect the establishment of flukes coming from the secondary infection, as the same percentages of recovered flukes were found in both groups. The specific IgG response to F. hepatica ESPs was similar in primary and secondary infections; challenge flukes did not induce any modification in the IgG response. The specific lymphocyte response to F. hepatica ESPs was absent in most of the infected goats, both primarily and secondarily infected. A modulation of the nonspecific cellular responses to mitogens was also observed. All infected goats showed a reduced proliferative response to concanavalin A and phytohemagglutinin. According to our results, humoral and cellular responses to F. hepatica ESPs in goats have no protective effect on the establishment of flukes and the development of disease in either primary or secondary infections.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004360050319
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  • 17
    Electronic Resource
    Electronic Resource
    Characterization of levamisole binding sites in Trichinella spiralis (1998)
    Springer
    Parasitology research 84 (1998), S. 757-759 
    Details
    ISSN: 1432-1955
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Characterization of the levamisole receptor was performed with total extracts of Trichinella spiralis muscle larvae using binding assays with tritiated levamisole ([3H]LEV, 291 GBq/mmol). We detected a specific [3H]LEV binding activity with a dissociation constant (Kd) of 4.76 μM and a receptor density (Bmax) of 2.14 pmol/mg of protein. In inhibition studies, only dimethylphenylpiperazinium iodide (DMPP) and hexamethonium were found to be competitive inhibitors of the [3H]LEV binding with an inhibition constant (Ki) of 31.04 and 4.43 μM, respectively, whereas d-tubocurarine and α-bungarotoxine had no effect on [3H]LEV binding activity, and procaine and atropine potentiated the [3H]LEV-receptor binding. All these data support the idea that levamisole acts as a cholinergic agonist in T. spiralis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004360050482
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  • 18
    Electronic Resource
    Electronic Resource
    Interaction of ivermectin with γ-aminobutyric acid receptors in Trichinella spiralis muscle larvae (1999)
    Springer
    Parasitology research 85 (1999), S. 320-323 
    Details
    ISSN: 1432-1955
    Keywords: Key words Ivermectin ; Nematodes ; GABA receptor ; Trichinella spiralis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract The value of the γ-aminobutyric acid (GABA) receptor of nematodes as a target for ivermectin's mode of action remains unclear. Using binding assays, we examined extracts from Trichinella spiralis muscle larvae for the presence of [3H]-ivermectin and [3H]-GABA binding sites. Tissue preparations displayed affinity binding sites for [3H]-ivermectin with a dissociation constant (K d) of 83 nM and a receptor density (Bmax) of 145 fmol/mg protein. We also identified a specific [3H]-GABA binding activity with a K d of 1.2 μM and a Bmax of 4.78 pmol/mg protein. In competition studies, ivermectin was found to be a competitive inhibitor of specific [3H]-GABA binding activity with an inhibition constant (K i) of 3.39 nM, suggesting that GABA receptors could be implicated in the mechanism of action of ivermectin in nematodes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004360050555
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  • 19
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    Performance of the missing transverse momentum triggers for the ATLAS detector during Run-2 data taking (2020)
    Springer
    Details
    Publication Date: 2020-08-01
    Print ISSN: 1126-6708
    Electronic ISSN: 1029-8479
    Topics: Physics
    Published by Springer
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  • 20
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    Measurement of the transverse momentum distribution of Drell–Yan lepton pairs in proton–proton collisions at $$sqrt{s}=13,$$TeV with the ATLAS detector (2020)
    Springer
    Details
    Publication Date: 2020-07-01
    Description: This paper describes precision measurements of the transverse momentum $$p_mathrm {T}^{ell ell }$$pTℓℓ ($$ell =e,mu $$ℓ=e,μ) and of the angular variable $$phi ^{*}_{eta }$$ϕη∗ distributions of Drell–Yan lepton pairs in a mass range of 66–116 GeV. The analysis uses data from 36.1 fb$$^{-1}$$-1 of proton–proton collisions at a centre-of-mass energy of $$sqrt{s}=13,$$s=13TeV collected by the ATLAS experiment at the LHC in 2015 and 2016. Measurements in electron-pair and muon-pair final states are performed in the same fiducial volumes, corrected for detector effects, and combined. Compared to previous measurements in proton–proton collisions at $$sqrt{s}=7$$s=7 and $$8,$$8TeV, these new measurements probe perturbative QCD at a higher centre-of-mass energy with a different composition of initial states. They reach a precision of 0.2$$\%$$% for the normalized spectra at low values of $$p_mathrm {T}^{ell ell }$$pTℓℓ. The data are compared with different QCD predictions, where it is found that predictions based on resummation approaches can describe the full spectrum within uncertainties.
    Print ISSN: 1434-6044
    Electronic ISSN: 1434-6052
    Topics: Physics
    Published by Springer
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