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1.
A novel experimental method was developed which allows the determination of the threshold concentration of sucrose by use of a linear sucrose gradient in water. With this method a continuous tasting of the test-liquid is possible. A panel of 15 persons experienced in taste-testing was used. Three gradients of different steepness were applied: 0 to 1.5% (w/w) sucrose in 2 min (I), 3 min (II) and 4 min (III). The results of the new method were compared with those of the standard method (DIN). With gradients I and II we found values which were significantly higher than those of the standard method (I: 0.49% (w/w); II: 0.46% (w/w); DIN: 0.31% (w/w)), whereas with gradient III the same threshold value was found as with the DIN-Method (III: 0.32% (w/w)). 相似文献
2.
Elke EM Brouwers Alwin DR Huitema Jos H Beijnen Jan HM Schellens 《BMC clinical pharmacology》2008,8(1):7
Background
The aim of this study was to evaluate long-term platinum retention in patients treated with cisplatin and oxaliplatin. 相似文献3.
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The compulsory dispute settlement regime included in the 1982 Law of the Sea Convention is recognized as one of the most comprehensive in a modern international convention. Yet, in the recent application of this regime, the question has arisen as to whether the procedural prerequisites associated with the LOS Convention's compulsory dispute settlement mechanism are so arduous as to avoid binding and compulsory jurisdiction in most instances. This article addresses that question by examining, in particular, the reasoning of the Southern Bluefin Tuna arbitration tribunal, which found Article 281 of Section 1 of the LOS Convention to bar jurisdiction to the compulsory dispute settlement mechanism prescribed by the Convention, and offers suggestions as to how states might distinguish or overcome the barriers imposed by the Southern Bluefin Tuna tribunal in future cases. 相似文献
5.
As part of an ongoing investigation into the effects of long-term UV-B radiation exposure on the growth and morphology of
woody perennials, the gas exchange and photosynthesis of five common deciduous tree species were measured. All five tree species
had been exposed to UV-B radiation for 5 years, in the field, at an enhancement level equivalent to an 18% ozone depletion.
Measurements made during the fifth year of UV-B irradiation recorded reductions in light-saturated photosynthesis, transpiration
and water use efficiencies. These changes were accompanied by marked reductions in individual leaf areas, stomatal density,
stomatal conductance and carboxylation efficiency. There were no significant changes in the maximum variable fluorescence
ratio, the quantum requirement of oxygen evolution, or light-saturated O2 production. Analysis of the response of net carbon assimilation to changing intercellular CO2 concentration (A/ci response) demonstrated no significant change in stomatal limitation. Reductions in photosynthesis were consistent with decreased
carboxylation efficiency. Although all five tree species were similarly affected by UV-B radiation treatment, the magnitude
of the responses was species-specific. These findings demonstrate the need for more long-term experimentation and also suggest
that changes in water use efficiency may be a significant factor in plants' responses to UV-B radiation.
This revised version was published online in June 2006 with corrections to the Cover Date. 相似文献
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