Now showing items 1-10 of 10
Doubly asymptotic trajectories of Lagrangian systems and a problem by Kirchhoff
(European Mathematical Society, 1997)
We consider Lagrangian systems with Lagrange functions which exhibit a quadratic time dependence. We prove the existence of infinitely many solutions tending, as t → ± ∞, to an «equilibrium at infinity». This result is ...
Physiology of olive nutrition I: factors affecting proton extrusion by roots of intact olive plants
The ability of roots of intact olive plants to change the pH of the external medium was studied. When the roots were put in contact with 1 mM CaSO4, a basification was recorded. The same behaviour was observed in the ...
Soil humic substances stimulate proton release by intact oat seedling roots
The effect of a soil humic fraction (HS) on proton extrusion into delonized water by intact oat seedling roots was studied. In the presence of HS, at concentration of 10 μg organic carbon (C) mL-1, a clear stimulation of ...
Trächtigkeitsuntersuchung von Neuweltkameliden = Pregnancy arial in American Camelids
(Schlütersche Verlagsgesellschaft, 1997)
There is a growing number of llama- and alpacabreeders in Europe. Therefore veterinarians are often asked to intervene in clinical management of different problems, especially reproductive problems. In this review the ...
The husbandry of South American camelids maintained under middle European conditions
(TERRA-VERLAG GMBH, 1997)
The popularity of South American camelids has increased in fur-ope. As a result, veterinarians are more frequently confronted with these species. Recommendations for keeping llnmas and alpacas in middle Europe are provided.
Reproduction in South American camelids. A review
(F K SCHATTAUER VERLAG GMBH, 1997)
Llamas and alpacas have gained international popularity over the last years. Therefore veterinarians are often asked to intervene in clinical management of different problems, especially reproductive problems. In this ...
Enhanced coherent Zener tunneling in indirect gap semiconductors
(AKADEMIE VERLAG GMBH, 1997)
We have investigated Zener tunneling in PIN silicon diodes by means of tight-binding calculations. We are able to demonstrate enhanced Zener tunneling in indirect band gap material by means of band gap modulation. Evidence ...
Enhanced Zener tunneling in silicon
(PERGAMON-ELSEVIER SCIENCE LTD, 1997)
We have investigated Zener tunneling in PIN silicon diodes by means of tight-binding calculations. Even though Zener tunneling is essentially a k-conserving process, we are able to demonstrate enhanced Zener tunneling in ...