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At least 343 records · Page 19Linked to original sources
PubMed1990

Effects of structural variation on Young's modulus of non-human cancellous bone.

The modulus of elasticity of cubes of cancellous bone, tested in three orthogonal directions, was measured along with apparent density, fabric (measured using image analysis techniques), connectivity and mineral volume fraction. Multiple regression was used to relate Young's modulus and the explanatory variables. The most important explanatory variable was apparent density; fabric was also important. Connectivity was highly correlated with apparent density, and so it is difficult to assign relative weights to these two variables. However, both have a significant, and separate, effect on Young's modulus. The total variance in Young's modulus explained by these three variables was about 85 per cent. This implies that other explanatory variables are either unimportant or highly correlated with the variables listed above. Mineral volume fraction is shown to be an unimportant variable, and arguments are produced why this is to be expected, even though it is highly important in explaining the variation in Young's modulus of compact bone.

Animals↗
PubMed1992

Structural variations in the jugular foramen of the human skull.

The jugular foramen was examined in 300 Anatolian skulls from the 17th and 18th centuries. In 61.6% the foramen was larger on the right and in 26% on the left, with the remainder being of almost equal size. An obvious dome caused by a superior jugular bulb was present bilaterally in 49%, on the right only in 36%, on the left only in 6%; it was absent bilaterally in 10.3%. Complete bony septation occurred in 5.6% on the right and in 4.3% on the left, partial septation was observed in 2.6% on the right and in 19.6% on the left. Another foramen which is completely separated by a spicule of bone and which transmits the inferior petrosal sinus was present in 5.6% of skulls on the right and in 4.6% on the left.

Cranial Nerves↗
PubMedDate not supplied

[Cytoplasmic male sterility-associated structural variation of the mitochondrial genome regions containing rps3 and orf215 in sugar beet Beta vulgaris L].

Several 5'-degenerate primers were selected by computer analysis and used for mtDNA typing in sugar beet cultivars with cytoplasms of the S (typical for cytoplasmic male sterility) or N (normal) type. A number of N- or S-specific markers were found to correspond to transcribed mitochondrial genes. One was from the orf215 region of the N-type mtDNA. A physical map of the corresponding region was constructed for the S-type mtDNA, and a substantial difference observed for the two genome types. One N-specific marker proved to contain a rearranged rps3 region and a truncated atp9 copy. With the known nucleotide sequence of this marker, three-primer PCR was designed and showed that both variants of the rps3 region simultaneously take place in the mtDNA pool, the new one occurring in a substochiometric proportion.

Base Sequence↗