Low impact of metal pollution on genetic variation in the earthworm Dendrobaena octaedra measured by allozymes     

Vibeke Simonsen  Ryszard Laskowski  Martin Holmstrup 《Pedobiologia》2008,52(1):51-60

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Evaluation of dressings to aid healing of mulesing wounds on sheep     

GW. LEVOT  PB. HUGHES  CJ. KALDOR 《Australian veterinary journal》1989,66(11):358-361

Five proprietary and one experimental dressing were compared with no treatment in their ability to aid healing of mulesing wounds in over 1900 young lambs. Healing was judged as the completeness of shrinkage of the mulesing cuts and the condition of scabs on the new skin surface. When assessed at 21 d it was found that treatment with Heriots Crown Wound Powder or Coopers Mulesing Powder offered a significant advantage over leaving the wounds untreated. Neither aqueous organophosphate washes, Defiance nor Defiance containing 0.08% chlorfenvinphos offered any healing advantage over controls. However, washing the wounds with an aqueous organophosphate solution aided healing more than the Defiance-based dressings. It was considered that the powders or the washes encouraged quick scab formation either by creating a dry covering (powders) or by washing away blood and allowing fast drying of the wound. The Defiance-type dressings slowed healing by keeping the wound moist for up to 10 d, but healing was not significantly different to the untreated group by 21 d.  相似文献   

Passive gear‐induced timidity syndrome in wild fish populations and its potential ecological and managerial implications          下载免费PDF全文

Robert Arlinghaus  Kate L Laskowski  Josep Alós  Thomas Klefoth  Christopher T Monk  Shinnosuke Nakayama  Arne Schröder 《Fish and Fisheries》2017,18(2):360-373

Human exploitation of wild‐living animals has been suggested to create a ‘landscape of fear’. A consequence could be that individuals surviving intensive harvesting, either as a result of behavioural plasticity and/or evolutionary change, exhibit increased average timidity. In the aquatic world, such effects are particularly well documented in passively operated fishing gears common to many commercial and recreational fisheries, such as angling, trapping or gill netting. We thus propose that an exploitation‐induced timidity syndrome should be a widespread pattern in fisheries. Importantly, we argue that the syndrome can be associated with several ecological and managerial consequences for social groups, populations, food webs, fisheries and assessment of stocks. We suggest research priorities to deepen our understanding of how exploited fish populations behaviourally respond to harvesting.  相似文献   

Plutonium-fission xenon found in Earth's mantle     

J Kunz  T Staudacher  CJ Allegre 《Science (New York, N.Y.)》1998,280(5365):877-880

Data from mid-ocean ridge basalt glasses indicate that the short-lived radionuclide plutonium-244 that was present during an early stage of the development of the solar system is responsible for roughly 30 percent of the fissiogenic xenon excesses in the interior of Earth today. The rest of the fissiogenic xenon can be ascribed to the spontaneous fission of still live uranium-238. This result, in combination with the refined determination of xenon-129 excesses from extinct iodine-129, implies that the accretion of Earth was finished roughly 50 million to 70 million years after solar system formation and that the atmosphere was formed by mantle degassing.  相似文献   

Copper-Catalyzed Oxidation of Alcohols to Aldehydes and Ketones: An Efficient, Aerobic Alternative   总被引：1，自引：0，他引：1  

IE Marko  PR Giles  M Tsukazaki  SM Brown  CJ Urch 《Science (New York, N.Y.)》1996,274(5295):2044-2046

An efficient, copper-based catalyst has been discovered that oxidizes a wide range of alcohols into aldehydes and ketones under mild conditions. This catalytic system utilizes oxygen or air as the ultimate, stoichiometric oxidant, producing water as the only by-product.  相似文献   

Composition of the mount st. Helens ashfall in the moscow-pullman area on 18 may 1980     

Hooper PR  Herrick IW  Laskowski ER  Knowles CR 《Science (New York, N.Y.)》1980,209(4461):1125-1126

Mineralogical and chemical analyses of the ashfall from Mount St. Helens on 18 May 1980 indicate that there were two distinct ashes. The early dark ash is composed principally of plagioclase and lithic fragments of plagioclase and glass with titanium-rich magnetite and some basaltic hornblende and orthopyroxene. The later pale ash, four-fifths by weight of the whole fallout, is 80 percent glass with plagioclase as the principal crystalline phase. Quartz and potassium feldspar are rare to absent in both ashes. Chemical analyses of nine ash fractions and of the glass in each type emphasize the differences between the two ash types and their chemical homogeneity.  相似文献   

CRYSTALLINE CATALASE FROM BEEF ERYTHROCYTES     

Laskowski M  Sumner JB 《Science (New York, N.Y.)》1941,94(2452):615-616

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Faecal PCR panel results and clinical findings in Western Australian dogs with diarrhoea     

MW Kim  CR Sharp  CJ Boyd  LN Twomey 《Australian veterinary journal》2020,98(11):563-569

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Heart rate as a measure of adaptation to stress in cattle   总被引：1，自引：0，他引：1  

CJ COOK  LH JACOBSON 《Australian veterinary journal》1996,74(6):471-472

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Effect of the chemical composition of industrial dusts on forest floor organic matter accumulation     

Władysław Grodziński  Jan Greszta  Ryszard Laskowski  Maciej Maryański  Anna Rożen 《Water, air, and soil pollution》1990,53(1-2):169-178

The influence of dusts from aluminium (AP), zinc and lead (ZP1, ZP2), sintering (SP) and power (PP) plants on organic matter accumulation on the forest floor of a mixed oak-pine forest was studied in Niepo?omice Forest near Kraków, Poland. An artificial application of the dusts on experimental plots was used corresponding to 100, 500, 1000, 2000, and 5000 t km^?2. Increased organic matter accumulation was observed 5 yr following the addition of AP, ZP1 and ZP2 dusts, while SP and PP dusts at levels > 100 t km^?2 caused a slight decrease in litter accumulation. Statistical analysis indicated that Cd, Mn, Pb and Zn present in industrial dusts were responsible for the increase in litter accumulation, while some nutrients (e.g. K, Mg, Na) contained in the dusts might decrease organic matter storage to some extent.  相似文献