منابع مشابه
Surface reaction dynamics.
The study of surface chemical reaction dynamics is crucial to many important areas of research such as heterogeneous catalysis, photocatalysis, material corrosion and etching, to name just a few. Many fundamental questions, for example mechanisms of important catalytic reactions, rely on the study of surface reaction dynamics. Prof. Gerhard Ertl’s achievements in this area exemplify the importa...
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In this paper altitude measurement from water surface using laser beam is presented. Research data indicate that the reflection of infrared waves from water surface is about zero and it is less than 2% for visible radiations. Phase-shift and heterodyne technique was used for the measurement, and the laser beam ( mW p nm 10 , 700 = = l ) was modulated by a sine wave having a fixed frequency....
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During a deficiency of reduced nitrogen sources, leguminous plants are able to live symbiotically with bacteria of the genera Rhizobium, Bradyrhizobium, or Azorhizobium (here collectively called rhizobia). The interaction starts with an attachment of the rhizobia to the plant root hairs. The plant enables the bacteria to invade its roots by the formation of tubular structures, the infection thr...
متن کاملAuxin-lnduced Epinasty of Tobacco Leaf Tissues'
lnterveinal strips (10 x 1.5 mm) excised from growing tobacco (Nicotiana tabacum L. cv Xanthi) leaves curled 2 3 0 0 " when incubated for 20 h in 5 to 500 ~ L M a-naphthalene acetic acid or 5 0 to 500 p~ indole-3-acetic acid. Epinasty was not induced without auxin or by the auxin analog p-naphthalene acetic acid, and less substantial epinasty was induced in midrib and vein segments. Auxin treat...
متن کاملSurface Treatments by Laser Technology
Industrial applications require parts of components with specific surface properties such are good corrosion resistance, wear resistance and hardness. Alloys with those properties are usually very expensive and there is a great interest in reducing the cost of components for fulfilling these requirements. In this sense, laser surface processing has been used as a cost-effective technique to imp...
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ژورنال
عنوان ژورنال: The Review of Laser Engineering
سال: 1985
ISSN: 0387-0200,1349-6603
DOI: 10.2184/lsj.13.734