QCD tests using b(b)over-bar g events and a new measurement of the B-hadron energy spectrum

We present new studies of 3-jet final states from hadronic Z(0) decays reco rded by the SLD experiment, in which jets are identified as quark, antiquar k or gluon. Our gluon energy spectrum, measured over the full kinematic ran ge, is consistent with the predictions of QCD, and we derive a limit on an anomalous chromomagnetic bbg coupling. We measure the parity violation in Z (0) decays into b(b) over bar g to be consistent with the predictions of el ectroweak theory and QCD, and perform new tests of T- and CP-conservation a t the bbg vertex. We also present a new technique for reconstructing the en ergy of a B hadron using the set of charged tracks attached to a secondary vertex. The B hadron energy spectrum is measured over the full kinematic ra nge, allowing improved tests of predictions for the shape of the spectrum. The average scaled energy is measured to be < x(B) > = 0.719 +/- 0.005(stat .) (Preliminary).