Search

Aramid fiber composites that are used in aircraft can be exposed to various fluids from inside and outside the aircraft during maintenance and flight operations. This article investigates how the aircraft fluid affected the tensile properties, including ultimate tensile strength, tensile modulus, and strain at break of aramid fiber composites. Two different types of aramid fiber composite test specimens were prepared; Kevlar® laminate (para-aramid) and Nomex® paper (meta-aramid). The test specimens were soaked in four different types of aircraft fluid, jet fuel, engine oil, hydraulic fluid, and water and tested to measure their tensile properties. The influence of fluid ingression on the test specimens was analyzed by comparing the test data of each fluid group to the control group. Digital image correlation (DIC) was used during the tensile test for strain calculation and better understanding of local strain change during the test. The test results showed that the test specimens soaked in hydraulic fluid and water had an evidence of tensile property change. [ABSTRACT FROM AUTHOR]

The complete mitochondrial genome of the Far Eastern Myotis,Myotis bombinus(Chiroptera, Vespertilionidae) is determined in this study. It is 17 128 base pairs in length with 13 protein-coding genes, 2 ribosomal RNAs, 22 transfer RNAs, and a non-coding control region. Its gene order is identical to that of other typical vertebrates. There are two tandem repeat sequences in the non-coding control region. Each repeat sequences contains 5 copies of 81 nucleotides and 42 copies of 6 nucleotides. Phylogenetic tree of mt 13 protein-coding gene sequences of 18 species in the family Vespertilionidae shows two distinct clades. Clade I consists ofMyotisandMurina, while Clade II contains all other species analyzed. [ABSTRACT FROM PUBLISHER]

We obtained the complete mitochondrial genome of the Ussuri white-toothed shrewCrocidura lasiura(Insectivora, Soricidae) at 17 362 base pairs (bp) containing 13 protein-coding genes, two ribosomal RNAs, 22 transfer RNAs, and a non-coding control region. Its gene order is identical to that of other vertebrates. Several repeat elements were identified in the non-coding control region (D-loop). Phylogenetic tree using mt protein-coding gene sequences showed thatC. lasiurawas closely related toC. attenuata. The reports of mt genome sequences ofCrocidurawere not enough to study phylogenetic relationships in genome levels. However, this report may help us to understand the phylogenetic relationships and evolutionary history ofCrocidura. [ABSTRACT FROM PUBLISHER]