Benz, G. , 1974 ; Negative Rückkoppelung durch Raum- und Nahrungskonkurrenz sowie zyklische Veränderungen der Nahrungsgrundlage als Regelprinzip in der Populationsdynamik des Grauen Lärchenwicklers, Zeiraphera diniana (Guenée) (Lep., Tortricidae) . Z. ang. Ent. 76 , 196 – 228 ....
侵蚀过程土壤剖面颗粒组成土壤侵蚀及其导致的土壤质量退化是世界性的重大环境问题之一,在黄土高原表现尤为突出,研究土壤侵蚀规律,对指导生态建设,恢复良好生态环境具有重要的意义.然而,传统研究土壤侵蚀规律的方法由于自身的局限性,难以对某些土壤侵蚀规律进行深入研究,核示踪技术在土壤侵蚀中的应用,拓宽了土壤侵蚀研究手段,...
Inge EischeidDorothee PutfarkenJutta SandkühlerUlrich MierwaldWerner HärdtleNatur und Landschaft
ESR data and geometry of 2 are reported, as well as those of stannyl radicals 2 , R = PhmMenCCH2 (m + n = 3) generated from the corresponding hydrides. The rotation around CSn bonds is hindered with increasing m. A preferred conformation is concluded from ESR data. Numerous compounds 1...
K?rpergefühlKunstLebensgr??e (in der Kunst)Raumvorstellungldquo; Experience and the conception of the world in science in transition to modern times ” is the general subject. There are two different points to be made clear, i.e. 1. That the conception of the world had to be made ...
A prototype of the PSFB converter is designed, built, and tested. Preliminary experimental results are provided to verify the design.W. HerzIEEE Applied Power Electronics Conference & Exposition-apec
Gackstatter, FritzAnnalen Der PhysikF. Gackstatter, Ann. Phys. 495 , 352 (1983) MathSciNetF. Gackstatter: U¨ber Planetenbewegung und Lichtbahnen im Schwarzschild- und im Reissner-Nordstr¨om-Raum. Ann. Phys. (Leipzig) 40, 352-374, 1983....