Deposition of gold mining tailings in tropical soils: metal pollution and toxicity to earthworms     

Cesar  Ricardo  Arruda  Fernanda  Ramiro  Vanessa  Faria  Roberto  Barcelos  Daniel  Pontes  Fernanda  Passos  Fabiano  Kaiser  Karoline  dos Santos Teixeira  Aline Maria  Serrano  Aline  Abreu  Leticia  Siqueira  Danielle  Teixeira  Matheus  Vezzone  Mariana  Polivanov  Helena  Castilhos  Zuleica 《Journal of Soils and Sediments》2022,22(2):547-558

Journal of Soils and Sediments - This study consists of the evaluation of metals acute toxicity levels taking into consideration a hypothetic scenario of dam breaking and land deposition of two...  相似文献   

Erratum to: A review of decision-making approaches to handle uncertainty and risk in adaptive forest management under climate change     

Rasoul Yousefpour  Jette Bredahl Jacobsen  Bo Jellesmark Thorsen  Henrik Meilby  Marc Hanewinkel  Karoline Oehler 《Annals of Forest Science》2012,69(5):531-531

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A review of decision-making approaches to handle uncertainty and risk in adaptive forest management under climate change     

Rasoul Yousefpour  Jette Bredahl Jacobsen  Bo Jellesmark Thorsen  Henrik Meilby  Marc Hanewinkel  Karoline Oehler 《Annals of Forest Science》2012,69(1):1-15

• Context  

This review paper provides an overview of approaches to which we may resort for handling the complex decision problems involving uncertainty and risk that climate change implies for forest managers. Modelling approaches that could support adaptive management strategies seem to be called for, not only as climate change denotes increased economic uncertainty but also because new and more reliable information becomes available as time passes and climate changes.  相似文献   

Enhancing emotion regulation and recognition among first graders through animal-assisted group training     

Karoline Turner  Birgit U. Stetina  Eva Burger  Tamara Lederman Maman  Ursula Handlos  Ilse Kryspin-Exner 《Journal of Veterinary Behavior: Clinical Applications and Research》2009,4(2):93-94

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Gas-liquid chromatographic determination of permethrin in bovine tissues     

D D Oehler 《Journal of the Association of Official Analytical Chemists》1979,62(6):1309-1311

A method is presented for the determination of permethrin (m-phenoxybenzyl cis,trans-(+/-)-3-(2,2-dichlorovinyl)-2,2-dimethylcyclopropanecarboxylate) in bovine tissues. Fat and muscle samples were cleaned up first by liquid-liquid partition on a bonded phase chromatographic column. Final cleanup of fat and muscle was performed on a short Florisil column. Liver, kidney, spleen, and heart tissues only required cleanup on a Florisil column before quantitation of permethrin by electron capture gas-liquid chromatography.  相似文献   

A dual indicator set to help farms achieve more sustainable crop protection     

Wustenberghs H  Delcour I  D'Haene K  Lauwers L  Marchand F  Steurbaut W  Spanoghe P 《Pest management science》2012,68(8):1130-1140

BACKGROUND: Farmers are being called to use plant protection products (PPPs) more consciously and adopt more sustainable crop protection strategies. Indicators will help farmers to monitor their progress towards sustainability and will support their learning process. Talking the indicators through in farmers' discussion groups and the resulting peer encouragement will foster knowledge acquirement and can lead to changes in attitudes, norms, perception and behaviour. RESULTS: Using a participatory approach, a conceptual framework for on‐farm sustainable crop protection practices was created. The same participatory approach was used to design a dual indicator set, which pairs a pesticide impact assessment system (PIAS) with a farm inquiry. The PIAS measures the risk for human health and the environment exerted by chemical crop protection. The inquiry reveals the farmers' response to this risk, both in terms of the actions they take and their knowledge, awareness and attitude. CONCLUSIONS: The dual indicator set allows for implementation in four tiers, each representing increased potential for monitoring and social learning. The indicator set can be adjusted on the basis of new findings, and the participatory approach can be extrapolated to other situations. Copyright © 2012 Society of Chemical Industry  相似文献   

Furuncular myiasis caused by Dermatobia hominis in five cats and efficacy of topical fluralaner for its treatment     

Diefrey Ribeiro Campos  Rayane Christine Pereira de Assis  Jéssica Karoline de Oliveira Chaves  Gabriela Pereira Salça de Almeida  Emily Andressa Santos Lima  Juliana de Moraes Intrieri  Fabio Barbour Scott 《Veterinary dermatology》2021,32(5):438-e117

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Dietary supplementation with curcumin-loaded nanocapsules in lambs:Nanotechnology as a new tool for nutrition     

Hiam Marcon  Luiz G. Griss  Vitor L. Molosse  Bruno G.O. Cecere  Davi F. Alba  Karoline W. Leal  Gabriela M. Galli  Carine F. Souza  Matheus D. Baldissera  Samanta Gundel  Vitria de A. Bassotto  Aline F. Ourique  Marcelo Vedovatto  Aleksandro S. Da Silva 《动物营养（英文）》2021,7(2):521

Curcumin-containing nanocapsule powder formulations have not been used in ruminant feed to date, despite the fact that curcumin is known to be a functional food additive. The objective of this study was to determine whether ethyl polymethacrylate (Eudragit L-100) nanocapsules loaded with curcumin (N-CU) would improve health and growth of lambs. Thirty-two male Lacaune lambs (body weight [BW] = 16 ± 0.99 kg; 45 d of age) were randomly assigned to 1 of 4 treatments: T0, T1, T2 and T4, representing supplementation of curcumin at 0, 1, 2, and 4 mg/kg concentrate, respectively. The animals in each treatment were allocated in 4 pens of 2 lambs each (8 lambs per treatment). The experiment lasted 17 d, with samples and measurements collected on d 0, 7, 12, and 17. The T2 lambs had greater average daily gain than T0 lambs. Regression analysis showed that the ideal dose of N-CU to enhance weight gain was 1.89 mg/kg concentrate. There were significant interactions (P < 0.05) between treatments × time for hematological variables, particularly for increases in erythrocytes (T2) and reductions in counts of leukocytes, neutrophils, and lymphocytes in T1 and T2. There were significant interactions between treatment × time for total protein, globulin, urea, and triglyceride levels. Stimulation of the antioxidant system was also observed. There were increased levels of non-protein thiols (NPSH), as well as increased activities of superoxide dismutase (SOD) and glutathione S-transferase (GST) in the supplemented animals. Levels of reactive oxygen species (ROS) were lower in the serum of supplemented lambs. In general, the 4 mg/kg dose had no positive effects on growth or health. This was an unexpected result, given the known properties of curcumin. Taken together, these findings suggest that addition of low concentrations of nanoencapsulated curcumin (T1 and T2) in lamb feed improves health, minimizing oxidative stress and generates anti-inflammatory effects that may have contributed indirectly to greater weight gain. Nanocapsules potentiate the effects of curcumin and may emerge as a new tool in animal nutrition.  相似文献   

The effect of metritis and subclinical hypocalcemia on uterine involution in dairy cows evaluated by sonomicrometry     

Maike HEPPELMANN  Karoline KRACH  Lars KRUEGER  Philipp BENZ  Kathrin HERZOG  Marion PIECHOTTA  Martina HOEDEMAKER  Heinrich BOLLWEIN 《The Journal of reproduction and development》2015,61(6):565-569

The objective of this study was to examine the effects of metritis and subclinical hypocalcemia on reduction of uterine size in dairy cows using ultrasonography and sonomicrometry. Four piezoelectric crystals were implanted via laparotomy into the myometrium of the pregnant uterine horn of 12 pluriparous Holstein Friesian cows 3 weeks before the calculated calving date. Sonometric measurements were conducted daily from 2 days before parturition (= Day 0) until Day 14 after calving and then every other day until Day 28. Distances between adjacent crystals were expressed in relation to reference values obtained before calving. The diameter of the formerly pregnant uterine horn was measured using transrectal B-Mode sonography starting on Day 10. Cows were retrospectively divided into the following groups: cows without metritis (M–; n = 7), cows with metritis (M+; n = 5), cows with normocalcemia (SH–; Ca > 2.0 mmol/l on Days 1 to 3; n = 5) and cows with subclinical hypocalcemia (SH+; Ca < 2.0 mmol/l in at least one sample between Days 1 and 3; n = 7). Metritis did not affect (P > 0.05) sonometric measurements, but the diameter of the formerly pregnant horn was larger (P ≤ 0.05) between Days 15 and 21 in M+ cows than in M‒ cows. Reduction in uterine length in hypocalcemic cows was delayed (P ≤ 0.05) between Days 8 and 21 compared with normocalcemic cows, but the uterine horn diameter was not related to calcium status. In conclusion, both diseases affected reduction of uterine size until Day 28. Cows with metritis had a larger uterine diameter, possibly attributable to accumulation of lochia, and cows with subclinical hypocalcemia had delayed reduction of uterine length, presumably related to reduction of myometrial contractility.  相似文献   

How old are the eukaryotes?     

Schopf JW  Oehler DZ 《Science (New York, N.Y.)》1976,193(4247):47-49

Evidence from Precambrian sediments appears to indicate that nucleated (eukaryotic) organisms had become well established and relatively diverse about 850 +/- 100 million years ago and that eukaryotes were probably extant, and may have first appeared, as early as 1400 +/- 100 million years ago.  相似文献