New Retainer Materials for Aircraft Gas Turbine Bearings

Abstract

A study of the wear behavior of several classes of potential cage m~terials for ai~craft gas turbine bearings was conducted, using a special wear-testing machine to approximate the projected service conditions of such bearings.It was found that: 1. Several heterogeneous alloys containing silver as a soft, low shear strength phase showed superior wear properties to presently used silicon-containing nickel-copper alloy ("S" monel) and iron-silicon bronze, even when silver-plated. The latter alloys were used as reference cage materials.. . . . The hard, load-supporting phase showing the most promise was a nickel base soith. additives of silicon or a silicide.. . 3. The materials showing the best wear properties were most efficiently fabTlca~ed by powder metallurgy techniques, utilizing the infiltration method for adding the siluer,

Proteomic analysis of redox- and ErbB2-dependent changes in mammary luminal epithelial cells using cysteine- and lysine-labelling two-dimensional difference gel electrophoresis

“…Notably, the more basic spots in these doublets were down-regulated by H 2 O 2 treatment, while the acidic spots were up-regulated. A similar pattern of regulation was reported in two previous studies, and was found to be due to oxidation of the active site cysteine thiols [20,21]. These shifts help to explain the differential labelling by the ICy dyes (see above).…”

Proteomic and redox‐proteomic study on the role of glutathione reductase in human lung cancer cells

“…In Supporting Information Table 2, a number of proteins showed an increase in labeling, suggesting the formation of new free thiols. This may occur through scission of disulfides or through labeling of isoforms generated by redoxdependent shifts in pI, as reported in the case of the peroxiredoxins [24][25][26]. The peroxiredoxins are antioxidant enzymes that function by reducing ROS and have been associated with redox regulation of cell signaling [27].…”

Cloning and Sequence of the L2Form of RubisCO from a Marine Obligately Autotrophic Hydrogen-oxidizing Bacterium,Hydrogenovibrio marinusStrain MH-110

“…The strain may survive in oligotrophic sea water by preparing different types of RubisCO for CO 2 fixation. In R. capsulata 33 ) and R. sphaeroides 15 ) cells, expression of form I RubisCO is known to be repressed by increased levels of CO 2 , We are now highly interested in the amounts and characteristics of various R uBisCOs in H. marinus cells grown under different culture conditions. Recently, cbbR, putative LysR-type regulatory proteins were subsequently detected upstream of the R ubisCO encoding genes in A. eutrophus, Chromatium vinosum, R. sphaeroides, Thiobacillus ferrooxidans, and Xanthobacter fiavus.…”