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Two F1, two F2 and two backcross (BC) full‐sib families of Salix sachalinensis × S. viminalis were tested for resistance to two pathotypes of Melampsora larici‐epitea in leaf‐disc inoculation experiments. Two single‐pustule isolates, VM and ST, belonging to pathotypes LET1 and LET5, respectively, were used in the tests. Disease was scored based on the number of uredinia, uredinial diameter and inoculum...
The use of coaxial or reentrant resonators is practical at frequencies down through the high-frequency band and even lower. By introducing a helical inner conductor, a Q of several thousand can be achieved in relatively small volume. Design equations are simple and are the basis for an alignment chart. The unloaded Q is equal to 50 times shield diameter in inches times square root of resonance frequency...
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