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排序方式: 共有218条查询结果,搜索用时 15 毫秒
1.
C. W. E. REDMAN S. E. CHAPMAN S. Y. CHAN E. J. BUXTON G. BLACKLEDGE D. M. LUESLEY† 《Cytopathology》1991,2(6):291-298
Peritoneal lavage fluid cytology was performed in 87 out-patients with histologically proven epithelial ovarian cancer undergoing primary management. A total of 246 peritoneal lavages were attempted, usually with temporary cannulae (n = 229). From these, 184 samples were obtained, of which 156 (85%) were suitable for cytological analysis. The sensitivity of peritoneal lavage fluid cytology in 67 patients with known residual disease was 57% whereas serum CA 125 levels were elevated in 58 (87%). Pre- and post-treatment peritoneal lavage fluid cytology had prognostic value, but this was less than that of serum CA 125 measurements. 相似文献
2.
川金丝猴口腔的观察 总被引:2,自引:1,他引:2
本文对川金丝猴的口腔进行观察,发现川金丝猴牙齿前后径总的趋向是I1>I2,I1>I2,I1>I1,I2>I2,上犬齿>下犬齿,P4>P3,P4>P3,M2>M3>M1,由于M3多一下次小尖,故M3>M2>M1。I1与I2大小有别,但看不到I2顶端明显变尖的迹象。犬齿的性二型主要表现在上犬齿,且主要表现于与P3、P4前后径的相对大小上。雄性上犬齿与I2的间距明显大。对金丝猴的年龄判断提出以切齿更换,咬合面形态、齿星出现,齿星形态等咬合面磨损规律的口齿鉴定法。对唇游离缘近口角处明显增厚及其性差别,腭扁桃体的大体形态作了描述。此外,对舌、腭、口腔腺也作了叙述和讨论。 相似文献
3.
溶解性有机碳在红壤水稻土中的吸附及其影响因素 总被引:12,自引:0,他引:12
吸附作用是影响土壤中溶解性有机碳(DOC)迁移转化及生物有效性的重要反应过程,研究DOC在土壤中的吸附行为,对正确阐明土壤有机碳的循环和转化特征以及进行污染风险评估有重要意义.采用平衡法研究了红壤水稻土对DOC的吸附特征,并分析土壤有机质、粘粒含量及pH值与DOC吸附量之间的关系.结果表明,供试土壤对DOC的吸附等温线符合Freundlich和Linear方程.不同土壤对DOC的吸附能力有明显差异.在相同浓度下,DOC吸附量以第四纪红色粘土发育的低肥力水稻土最大,第三纪红砂岩风化物发育的低肥力水稻土次之,两种高肥力水稻土最小.土壤对DOC的吸附过程分为快、慢两个阶段,0-0.25 h内DOC的吸附速率最大,随着时间的推移,吸附速率渐小,2-4 h后基本达到吸附平衡.描述供试土壤对DOC吸附动力学过程的最优模型为一级扩散方程,其次为Elovich方程和抛物扩散方程.粘粒含量和有机质是影响土壤DOC吸附量的重要因素,随着粘粒含量的增加,有机质含量的降低,DOC的吸附量增大. 相似文献
4.
今年是《生理学报》创刊80周年。我很荣幸获邀主编这期特刊,以纪念这一中国生理学发展史上的重要里程碑。[第一段] 相似文献
5.
Novel microbial nitrogen removal processes 总被引:47,自引:0,他引:47
The present-day wastewater treatment practices can be significantly improved through the introduction of new microbial treatment technologies. Recently, several new processes for nitrogen removal have been developed. These new nitrogen removal technologies provide practicable options for treating nitrogen-laden wastewaters. The new processes are based on partial nitrification of ammonium to nitrite combined with anaerobic ammonium oxidation. These processes include the single reactor system for high ammonia removal over nitrite (SHARON) process, which involves part conversion of ammonium to nitrite; the anaerobic ammonium oxidation (ANAMMOX) process, which involves anaerobic ammonium oxidation; and the completely autographic nitrogen removal over nitrite (CANON) process, which involves nitrogen removal within one reactor under oxygen-limited conditions. These new processes target the removal of nitrogen from wastewaters containing significant quantities of ammonium. 相似文献
6.
稻飞虱是缅甸水稻种植区常见且分布广泛的一类害虫,可造成农作物不同程度的减产.稻飞虱的爆发与高产品种的大规模推广种植具有一致性,同时其种群变化也与天气条件有关.近年来,缅甸中部部分省份稻飞虱大量孳生,在一定程度上,这与氮肥施用水平有关.雨季稻飞虱种群增加,7月和8月为高峰期.在缅甸,主要通过培育抗虫、抗旱、抗逆等水稻品种来防控稻飞虱.同时用诱虫灯进行早期入侵的虫源的监测,必要时,采用化学杀虫剂防治.缅甸部分农场还采用了病虫害综合管理系统(IPM),以建立健康、安全、可调节的水稻生态系统及可持续的病虫害管理. 相似文献
7.
<正>翼手目为哺乳动物中的第二大目,中国的翼手目多样性也在不断更新,Smith和解焱(2009)统计中国翼手目118种,蒋志刚等(2015)则认为中国翼手目有7科34属134种。广东省翼手目有6科24属55种(邹发生和叶冠锋,2016),此后也仍陆续有新纪录,如长指鼠耳蝠(Myotis longipes)(张琴等,2017)、卡氏伏翼(Hypsugo cadornae)(Xie et al., 2021);我们前期对澳门翼手目的调查,发现5科8属10种(黄继展等,2013)。 相似文献
8.
Yu-Chi Liu Yan Peng Nyein Chan Lwin Subbu S. Venkatraman Tina T. Wong Jodhbir S. Mehta 《PloS one》2013,8(8)
Frequent and long-term use of topical corticosteroids after corneal transplantation is necessary to prevent graft rejection. However, it relies heavily on patient compliance, and sustained therapeutic drug levels are often not achieved with administration of topical eye drops. A biodegradable drug delivery system with a controlled and sustained drug release may circumvent these limitations. In this study, we investigated the efficacy of a prednisolone acetate (PA)-loaded poly (d,l-lactide-co-ε-caprolactone) (PLC) microfilm drug delivery system on promoting the survival of allogeneic grafts after penetrating keratoplasty (PK) using a rat model. The drug release profiles of the microfilms were characterized (group 1). Subsequently, forty-eight PK were performed in four experimental groups: syngeneic control grafts (group 2), allogeneic control grafts (group 3), allogeneic grafts with subconjunctivally-implanted PA microfilm (group 4), and allogeneic grafts with PA eye drops (group 5; n = 12 in each). PA-loaded microfilm achieved a sustained and steady release at a rate of 0.006–0.009 mg/day, with a consistent aqueous drug concentration of 207–209 ng/ml. The mean survival days was >28 days in group 2, 9.9±0.8 days in group 3, 26.8±2.7 days in group 4, and 26.4±3.4 days in group 5 (P = 0.023 and P = 0.027 compared with group 3). Statistically significant decrease in CD4+, CD163+, CD 25+, and CD54+ cell infiltration was observed in group 4 and group 5 compared with group 3 (P<0.001). There was no significant difference in the mean survival and immunohistochemical analysis between group 4 and group 5. These results showed that sustained PA-loaded microfilm effectively prolongs corneal allograft survival. It is as effective as conventional PA eye drops, providing a promising clinically applicable alternative for patients undergoing corneal transplantation. 相似文献
9.
Maung Maung Theint San Thwe Thidalay Myat Myat Zaw Khin Shimada Tomofumi Bawm Saw Kobayashi Motoko Saing Khin Maung Katakura Ken Arai Satoru Suzuki Hitoshi 《Journal of Mammalian Evolution》2021,28(2):497-509
Journal of Mammalian Evolution - We addressed the spatiotemporal characteristics of four commensal rodent species occurring in Myanmar in comparison with other areas of the Indo-Malayan region. We... 相似文献
10.
Verena I. Carrara Khin Maung Lwin Aung Pyae Phyo Elizabeth Ashley Jacher Wiladphaingern Kanlaya Sriprawat Marcus Rijken Machteld Boel Rose McGready Stephane Proux Cindy Chu Pratap Singhasivanon Nicholas White Fran?ois Nosten 《PLoS medicine》2013,10(3)