Foreign bodies are a rare cause of appendicitis, because in most cases these ingested foreign bodies cross the digestive tract asymptomatically [1] [2] [3]. However, some penetrate the lumen of the appendix causing it...Foreign bodies are a rare cause of appendicitis, because in most cases these ingested foreign bodies cross the digestive tract asymptomatically [1] [2] [3]. However, some penetrate the lumen of the appendix causing its inflammation. We report an unusual observation of acute appendicitis induced by a foreign body namely a bone fragment in the visceral surgery department of the Centre Hospitalier Intercommunal de Villeneuve Saint-Georges.展开更多
Generally, ingested foreign bodies are excreted from the digestive tract without any complications or morbidity. In adults, ingestion of foreign bodies frequently occurs in alcoholics and elderly individuals with dent...Generally, ingested foreign bodies are excreted from the digestive tract without any complications or morbidity. In adults, ingestion of foreign bodies frequently occurs in alcoholics and elderly individuals with dentures. The most commonly ingested foreign bodies are food stuffs or their parts, such as fish bones or fragments of bone and phytobezoars. Sharp foreign bodies like fish and chicken bones can lead to intestinal perforation and peritonitis. We report herein two cases, one of bowel perforation and another of anal impaction, both caused by ingested bone fragments. Complications due to ingested bone fragments are not common and preoperative diagnosis remains a challenge and therefore it must be considered in susceptible cases.展开更多
The apoptosis in human bone tumor cells induced by internal irradiation with 153Sm was studied. The morphological changes in bone tumor cells were observed by electronic and fluorescent microscopy, as well as DNA agar...The apoptosis in human bone tumor cells induced by internal irradiation with 153Sm was studied. The morphological changes in bone tumor cells were observed by electronic and fluorescent microscopy, as well as DNA agarose gel eletrophoresis. DNA chain fragmentation, microautoradiographic tracing and the inhibition rate of prolif- eration in bone tumor cells exposed to 153Sm with different duration time were examined. It was demonstrated that the bone tumor cells exposed to 153Sm displayed nuclear fragmentation, pyknosis, margination of condensed chroma- tin, and formation of membrane bounded apoptotic bodies, whereas the percentage of DNA chain fragmentation of bone tumor cells increases in direct proportion to the duration of irradiation with153 Sm, as well as DNA ladder for- mation in apoptotic cells. Also a marked inhibition effect of proliferation in bone tumor cells after exposure with 153Sm was observed.展开更多
甲骨残片缀合一直是甲骨学研究中最急迫最具基础性的工作,它使得甲骨残片经过拼接,复原为更加完整的原始材料.尽管前人及同行曾提出若干计算机辅助的甲骨缀合方法,但这些方法缀合准确度不足,未能真正投入使用,并不能真正帮助专家解决甲...甲骨残片缀合一直是甲骨学研究中最急迫最具基础性的工作,它使得甲骨残片经过拼接,复原为更加完整的原始材料.尽管前人及同行曾提出若干计算机辅助的甲骨缀合方法,但这些方法缀合准确度不足,未能真正投入使用,并不能真正帮助专家解决甲骨缀合问题,导致当前的甲骨缀合工作仍旧依靠人工、依旧费时费力.为了更好地研究甲骨残片的机器缀合问题,本文使用一个较大规模甲骨缀合基准数据集OB-Rejoin,该数据集包含了约一千幅甲骨拓片图像,且融入了大量的甲骨学界已缀成果,用于算法评估.基于该数据集,本文设计了一种基于斜率变化量序列匹配的甲骨缀合算法(Slope United Sequence Matching for Oracle Bone Fragments Conjugation,SUM),该方法将甲骨残片的断边碴口图像匹配问题转化为数值型的序列数据和序列相似性比对问题,以将尚不够非常精密的计算机视觉领域的碴口图像匹配问题转换为数据科学领域较为成熟的序列数据相似性匹配问题.SUM将数值型的碴口序列数据进一步转换为斜率变化量序列和字符序列数据,最后利用字符序列的模糊匹配完成甲骨残片的碴口匹配.在实验环节,SUM算法与经典的序列相似性计算方法在精确率、召回率、漏检率方面进行了对比,并与两个较新的基于深度学习的序列匹配算法和形状匹配算法进行了性能对比.整体而言,SUM在OB-Rejoin数据集上的Top-15缀合召回率达到了95.181%,超越了对比算法.重要出土文献的精准复原本身是历史学和古文字研究中客观存在的重大现实需求,具有重要的史学价值和意义,因此,本文的研究成果,不但有助于解决甲骨残片的机器缀合问题,还对秦汉简牍和敦煌遗书等重要出土文献的精准复原具有重要的参考价值.展开更多
Screw metal implants (3S, Israel) with rough or smooth polished surface were introduced in a tibial proximal condyle of not purebred rabbits. The condition of surrounding tissues in 2 and 6 months after implantation w...Screw metal implants (3S, Israel) with rough or smooth polished surface were introduced in a tibial proximal condyle of not purebred rabbits. The condition of surrounding tissues in 2 and 6 months after implantation was compared by light microscopy and X-ray methods. Within 6 months after operation the considerable distinctions of radiological and morphological data were revealed not. 2 months later after introduction of implants with a rough surface the effort enclosed for its twisting is, much more, than for removal of the polished product. However, stability of fixing of implants was practically made even at 6 months. On remote rough implants there is a set of tissue scraps whereas on products with a smooth surface the tissue remains were much less. Surrounding tissues strongly join a rough surface, grow into cavities, and during removal of such products there is a considerable trauma of tissues round an implantation place. Smooth implants have the smaller area of contact with organism tissues, they are fixed due to bicortical implantation, during removal easily get out and don’t break off surrounding tissues. The signs of inflammation and formation of merged multinuclear macrophages were not found at all cases, which give evidence to the inertness of material of the mentioned articles for living organism. In some observations however and by implantation of the rough article and by introduction of polished implants, metal particles were found, but after use of the foreign body with grit-blasted treatment of surface metal was found more frequently, and its fragments had larger volume.展开更多
文摘Foreign bodies are a rare cause of appendicitis, because in most cases these ingested foreign bodies cross the digestive tract asymptomatically [1] [2] [3]. However, some penetrate the lumen of the appendix causing its inflammation. We report an unusual observation of acute appendicitis induced by a foreign body namely a bone fragment in the visceral surgery department of the Centre Hospitalier Intercommunal de Villeneuve Saint-Georges.
文摘Generally, ingested foreign bodies are excreted from the digestive tract without any complications or morbidity. In adults, ingestion of foreign bodies frequently occurs in alcoholics and elderly individuals with dentures. The most commonly ingested foreign bodies are food stuffs or their parts, such as fish bones or fragments of bone and phytobezoars. Sharp foreign bodies like fish and chicken bones can lead to intestinal perforation and peritonitis. We report herein two cases, one of bowel perforation and another of anal impaction, both caused by ingested bone fragments. Complications due to ingested bone fragments are not common and preoperative diagnosis remains a challenge and therefore it must be considered in susceptible cases.
基金Supported by the International Atomic Energy Agency (9547/RBF)
文摘The apoptosis in human bone tumor cells induced by internal irradiation with 153Sm was studied. The morphological changes in bone tumor cells were observed by electronic and fluorescent microscopy, as well as DNA agarose gel eletrophoresis. DNA chain fragmentation, microautoradiographic tracing and the inhibition rate of prolif- eration in bone tumor cells exposed to 153Sm with different duration time were examined. It was demonstrated that the bone tumor cells exposed to 153Sm displayed nuclear fragmentation, pyknosis, margination of condensed chroma- tin, and formation of membrane bounded apoptotic bodies, whereas the percentage of DNA chain fragmentation of bone tumor cells increases in direct proportion to the duration of irradiation with153 Sm, as well as DNA ladder for- mation in apoptotic cells. Also a marked inhibition effect of proliferation in bone tumor cells after exposure with 153Sm was observed.
文摘甲骨残片缀合一直是甲骨学研究中最急迫最具基础性的工作,它使得甲骨残片经过拼接,复原为更加完整的原始材料.尽管前人及同行曾提出若干计算机辅助的甲骨缀合方法,但这些方法缀合准确度不足,未能真正投入使用,并不能真正帮助专家解决甲骨缀合问题,导致当前的甲骨缀合工作仍旧依靠人工、依旧费时费力.为了更好地研究甲骨残片的机器缀合问题,本文使用一个较大规模甲骨缀合基准数据集OB-Rejoin,该数据集包含了约一千幅甲骨拓片图像,且融入了大量的甲骨学界已缀成果,用于算法评估.基于该数据集,本文设计了一种基于斜率变化量序列匹配的甲骨缀合算法(Slope United Sequence Matching for Oracle Bone Fragments Conjugation,SUM),该方法将甲骨残片的断边碴口图像匹配问题转化为数值型的序列数据和序列相似性比对问题,以将尚不够非常精密的计算机视觉领域的碴口图像匹配问题转换为数据科学领域较为成熟的序列数据相似性匹配问题.SUM将数值型的碴口序列数据进一步转换为斜率变化量序列和字符序列数据,最后利用字符序列的模糊匹配完成甲骨残片的碴口匹配.在实验环节,SUM算法与经典的序列相似性计算方法在精确率、召回率、漏检率方面进行了对比,并与两个较新的基于深度学习的序列匹配算法和形状匹配算法进行了性能对比.整体而言,SUM在OB-Rejoin数据集上的Top-15缀合召回率达到了95.181%,超越了对比算法.重要出土文献的精准复原本身是历史学和古文字研究中客观存在的重大现实需求,具有重要的史学价值和意义,因此,本文的研究成果,不但有助于解决甲骨残片的机器缀合问题,还对秦汉简牍和敦煌遗书等重要出土文献的精准复原具有重要的参考价值.
文摘Screw metal implants (3S, Israel) with rough or smooth polished surface were introduced in a tibial proximal condyle of not purebred rabbits. The condition of surrounding tissues in 2 and 6 months after implantation was compared by light microscopy and X-ray methods. Within 6 months after operation the considerable distinctions of radiological and morphological data were revealed not. 2 months later after introduction of implants with a rough surface the effort enclosed for its twisting is, much more, than for removal of the polished product. However, stability of fixing of implants was practically made even at 6 months. On remote rough implants there is a set of tissue scraps whereas on products with a smooth surface the tissue remains were much less. Surrounding tissues strongly join a rough surface, grow into cavities, and during removal of such products there is a considerable trauma of tissues round an implantation place. Smooth implants have the smaller area of contact with organism tissues, they are fixed due to bicortical implantation, during removal easily get out and don’t break off surrounding tissues. The signs of inflammation and formation of merged multinuclear macrophages were not found at all cases, which give evidence to the inertness of material of the mentioned articles for living organism. In some observations however and by implantation of the rough article and by introduction of polished implants, metal particles were found, but after use of the foreign body with grit-blasted treatment of surface metal was found more frequently, and its fragments had larger volume.
