D-二聚体在卵巢癌预后评估中的价值

目的研究D-二聚体对卵巢癌患者的预后评估价值。方法回顾性地分析了130名卵巢癌患者就诊时的血浆D-二聚体水平以及在确诊后8 a内的生存状况。采用受试者工作特征（ROC）曲线分析法、Kaplan-Meier生存曲线和Cox风险比例模型分析了D-二聚体对卵巢癌患者的预后评估价值。结果 D-二聚体水平随着卵巢癌患者国际妇产科联盟（FIGO）分期的递进而增加。D-二聚体预测卵巢癌患者死亡的曲线下面积为0.72,与CA125相似。D-二聚体≥355.0μg/L的患者,预后较差。在校正了CA125水平后,D-二聚体≥355.0 g/L对卵巢癌的预后仍然独立相关。结论 D-二聚体可能是卵巢癌患者独立的预后标志物。     

AA鸡体内含硒量的试验

从先后饲养45d龄的3群AA鸡中各选择10羽,每羽体重约2kg,公母各半,口腔投人~(75)Seo_2 4 μci/羽,常规饲养24h,屠宰分别取其肌肉、心、肝、毛和粪便各1g,采用“ET-613自动计数~(125)I放免测量仪”测量~(75)Seo_2在鸡体内肌肉、心、肝、毛中的分布和在粪便中~(75)Seo_2的含量。按4μci/羽剂量的放射性~(75)Seo_2引入鸡体内,测量结果,经24h,在肝脏含量最多,而肌肉最少。用放射性~(75)Seo_2制剂,由4μci/羽至8μci/羽的范围内引入量,随着剂量增加所测器官放射性~(75)Seo_2无明显增加,而粪便的放射性~(75)Seo_2则随引入放射性~(75)Seo_2课题的增加而增加。     

玉米优良自交系L102的配合力及应用潜势分析

采用G riffing完全双列杂交设计,将L 102与国内骨干系组配成28个杂交组合,对株高、穗位高、穗长、结实长、穗粗、籽粒产量、出籽率、百粒重等8个主要性状配合力分析表明,L 102自交系一般配合力和特殊配合力均较高,具有长穗、出籽率高、植株矮的特点,与大穗、大粒自交系组配可选育出强优组合。自交系L 102与我国常用的4大类种质和P群间,均具有较高的特殊配合力效应,而L 102×旅系、L 102×黄改系为最优的杂交模式。     

生物抑制剂处理结合低温冷藏对龙眼保鲜质量的影响

以提高龙眼的保鲜质量和商品率为目的,采用生物抑制剂处理龙眼进行低温气调保鲜。采用正交试验方法,分析了生物抑制剂对龙眼果皮褐变和保鲜效果的影响。结果表明,在相同的低温气调保鲜条件下,采用生物抑制剂处理,可更有效地抑制龙眼保鲜过程的呼吸作用,有效降低了酶活性的变化,延缓了龙眼果实的衰老与果皮褐变,保鲜时间长,且更好地保留了果实的营养成分,商品率高。     

气调贮藏对白玉枇杷保鲜效果的影响

对天津蓟县磨盘柿进行冷藏保鲜效果试验.结果表明,在(0±0.5)℃低温条件下,柿果贮藏30天时出现一个小的呼吸高峰值;在贮藏80天内,乙烯生成速率始终呈缓慢上升趋势,而硬度随时间推移呈线性下降.贮藏初期,柿果中可溶性单宁含量急剧下降,贮到66天时其含量已降到0.02%,低于果实的涩味阈值.维生素C含量在贮藏初期20天内明显上升达到高峰值,以后总趋势呈逐渐降低.试验同时发现,在20℃条件下磨盘柿具有典型的呼吸跃变现象.     

CO2气调储藏防治储粮害虫的研究

在气密性良好的粮仓内通入CO2气体来改变粮仓内气体的组成，使粮仓中的昆虫因缺氧窒息而死亡。试验表明：CO2气调技术能完全杀死粮仓内昆虫成虫、卵、蛹和幼虫，有效保持粮食较高品质和延长储藏期，不会产生任何残留污染，是一项能完全替代磷化铝的储粮新技术。     

基于CA模型的重庆市沙坪坝区土地利用变化模拟

该文以重庆市沙坪坝区为研究区域,借助GeoSOS平台,采用2004、2006年的土地利用、道路、镇政府点、高程数据,利用基于Lo-gistic—CA模型方法对土地利用变化进行模拟研究.结果显示,CA模型模拟土地利用变化与实际土地利用类型面积相差不大,具有较高精度.在城市规划与区域发展情景和生态环境保护管理情景2种管理情景下,未来的重庆市沙坪坝区城市建设用地将持续增加,城市建设用地对具有重要生态功能的林地威胁较小,但对非基本农田之外的耕地或农田占用较多.     

CO2气调储粮启封后品质变化的原因及控制方法

对采用CO2气调储藏后的不同水分、不同品质的籼米和粳米，在粮温30℃左右和20℃左右等不同条件启封进行室内试验和实仓试验。启封后不同时间分别取样进行品质测定。试验结果表明，大米品质是启封后品质变化的关键。而大米的水分含量和启封时的温度是CO2气调储藏启封后品质变化的重要因素。     

Clinical evaluation of the CA530-VET hematology analyzer for use in veterinary practice

BACKGROUND: The CA530-VET is a completely automated impedance cell hematology analyzer, which yields a 16-parameter blood count including a 3-part leukocyte differential. OBJECTIVES: The aim of this study was to examine the operational potential of the CA530-VET and its value for use in veterinary practice. METHODS: The analyzer was tested for blood carry-over, precision, and accuracy. Comparison methods included the CELL-DYN 3500, microhematocrit centrifugation, manual platelet (PLT) counting for feline and equine species, and a 100-cell manual WBC differential. Blood samples for comparison of the methods were obtained from 242 dogs, 166 cats, and 144 horses. RESULTS: The carry-over ratio (K) was 0.28% for RBC, 0.59% for PLT, 0.32% for WBC, and 0.18% for hemoglobin (HGB) concentration. Coefficients of variation (CVs) for within-batch precision and duplicate measurement of blood samples were clearly within the required limits, except for duplicate platelet counts in cats (8.7%) and horses (9.5%). The WBC count was in excellent agreement for dogs and horses and RBC count was in excellent agreement for horses. The accuracy of feline WBC counts was not acceptable, with the exception of values at the high end of the range. RBC counts in dogs and cats, and HGB concentration and MCV in all 3 species were sufficiently accurate. The CA530-VET HCT results were in excellent agreement with microhematocrit results in horses but exceeded the maximum allowed inaccuracy for cats and dogs. In all species, PLT counts established mechanically and manually were not in adequate agreement. Large differences were found between the CA530-VET and the manual differential percentage for lymphocytes and "mid-sized cells" (monocytes and basophilic granulocytes). CONCLUSIONS: The CA530-VET can be considered useful for routine canine, feline, and equine blood cell analyses. It should not be considered accurate, however, for PLT counts, feline total WBC counts in the subnormal and normal range, and leukocyte differentials, except for granulocytes.