Background The vertebral artery （VA） and atlantoaxial joint （AAJ）, with complicated structures, are located in the depths of the head-neck boundary area, the regional anatomy of which cannot be shown ...globally and directly. This study aims to evaluate three-dimensional CT angiography （3DCTA） in displaying the AAJ, atlantoaxial segment of the vertebral artery （ASVA） and the identification of their interrelations. Methods Sixty-eight subjects without pathology of the ASVA and AAJ were selected from head-neck CTA examination. All the 3D images were formed with volume rendering （VR） together with techniques of separating, fusing, opacifying and false-coloring （SFOF）. On the 3D images, the ASVA and AAJ were observed, and their interrelations were measured. Results All the 3DCTA images were of high quality and up to our requirements. They could clearly and directly show the ASVA, ascending along the AAJ. There were 5 curves in the course of the ASVA, of which 2 curves were away from the atlantoaxial joint, one in the 2rid curve of 0.0 mm-5.4 mm, the other in the 4th of 2.6 mm-9.2 mm. There was no significant difference in the measurements between left and right （P 〉0.05）. The curved parts of the ASVA slightly expanded, with the biggest diameter of 5.6 mm in the 4th curve. Statistical comparison shows that the left ASVA is larger than the right （P 〈0.05）. Variations of the ASVA were found in 8 cases and of the AAJ in 12. Conclusions 3DCTA can globally and directly demonstrate the structures of the AAJ, ASVA and their interrelations. The 3D imaging data make up and enrich the research contents of regional anatomy and lay the foundation for related study and applications.
On the marked plants of the Oil-Tea camellia (Camellia oleifera) fine variety "Xianglin 4" , the mechanism of the oil formation and transformation were explored by the analysis of the fruit growth ...and their oil contents. The results showed that the fruit sizes increased sharply from the mid of June to the end of July, while the fruit weight increased by 2/3 of the all in two growing season, from the mid of June to the end of July and from the mid of September to harvest. There were two increasing peaks though the oil content of the seed pip, the fresh seed and the fresh fruit increased along with the fruit growth, from the mid of August to harvest except for in the mid of September. 68.9% of the oil content of fresh fruit increased from the last month (September 20 to October 20) , indicating that oil yield of the Oil-Tea camellia should be a great loss only if the fruit were harvested before ripeness. 通过对油茶主要良种的标定植株进行果实生长和含油量分析研究,探索油茶果实油脂形成与转化的内在机理。结果表明果实体积生长主要在6月中旬至7月下旬。油茶果实质量的增加主要在6月中旬至7月下旬和9月中旬至10月下旬采收前两个
