Clonogenic growth of acute non-lymphocytic leukemia cells in serum-free medium

Summary We devised a serum-free medium for growth of leukemic colony-forming units (CFU-L), enriched with albumin, transferrin, lipids, insulin, hydrocortisone and oligoelements. Blast cells from 15 patients affected by acute non-lymphocytic leukemia were grown in this medium in the presence of human placental conditioned medium obtained under serum-free conditions (sfHPCM). Their clonogenic growth was comparable with that obtained in a serum-containing system. Furthermore, when serum-free cultures were carried out in absence of sfHPCM, either CFU-L growth was prevented or, if clones were obtained, the cultures showed a marked decrease in clonogenicity, indicating their strict dependence on growth factors.     

武夷山主要杉木伴生树种落叶分解速率的研究

在武夷山天然杉木混交林群落调查的基础上，选择了与杉木相容性大，联结系数高的毛竹，木荷等６种杉木伴生树种作落叶分解速率的比较研究，结果表明，各树各落叶经过一年的分解其干物质残留率分别为：甜槠２８．４％，丝栗栲３２．９％，毛竹３３．７％，米槠３５．６％，苦槠４０．１％，木荷４４．４％。落叶的主要养分元素浓度和残留率在分解过程中均有较大的波动，有些树种氮、磷、钙、镁等元素的含量出现绝对量的增加，但碳氮比     

Plasma lipid-bound sialic acid alterations in neoplastic diseases

Summary Plasma lipid-bound sialic acid (LSA) was assayed in normal volunteers, patients with non-malignant diseases, and a variety of cancer patients. Mean plasma LSA in 50 normal volunteers, 16 patients with non-malignant diseases, 54 breast cancer, 17 lung cancer, 15 colon cancer, 7 ovarian cancer, 5 prostate cancer, 4 leukemia, 4 gastrointestinal, 3 thyroid cancer, 3 pancreas cancer and 2 adrenal cancer patients were 17.7, 23.2, 58, 85, 56.7, 46.2, 56.7, 53.3, 31.1, 33.2 and 119.5 mg/dl, respectively. None of the normal volunteers had elevated plasma LSA values. Plasma LSA level was not significantly different in male and female volunteers. Two patients with rheumatic arthritis had LSA values slightly elevated over the mean + 2 SD for the normal volunteers. Two out of 114 different cancer patients had plasma LSA levels within normal range exhibiting 98.2% sensitivity of the assay. Plasma LSA, which is relatively simple to assay, may be used as a tumor marker in wide variety of neoplastic diseases.     

论离散振系特征灵敏度的模态法

推广了Ｂｅｒｎａｒｄ和Ｂｒｏｎｏｗｉｃｋｉ针对自伴系统提出的模态展开特征灵敏度方法。从最小能量逆出发，直接导出一族模态法，它适用于异导或等导重根的特征矢导的计算。模态法和的模态法是本族的一个子集。     

Noether环上的压缩模

主要讨论压缩模的一些性质和定理,给出了在右Noether环上压缩模的等价刻画条件.证明了一个非零有界右R-模M是压缩的当且仅当对于M的每一个相伴素理想P,存在一个右R-单同态f:M→R/P.     

结肠充气螺旋CT扫描对15例结肠病变的诊断

目的:探讨结肠充气螺旋CT扫描对结肠肿瘤的诊断价值.方法:对15例结肠病变患者首先按未做肠道准备的腹部常规CT扫描.然后按照纤维结肠镜检查的肠道要求做好肠道准备,在电视透视下给病人大肠内灌气,再进行螺旋CT容积扫描将诊断结果与纤维结肠镜对比.结果:病灶＜5 mm、5～9 mm及10～29 mm大小检出率CT扫描与纤维结肠镜对比,常规法CT扫描检出率为0,而结肠充气后CT扫描分别为66.6%,80%,100%.手术中发现6例病变已侵犯肠壁外,常规法CT扫描4例相符,结肠充气CT检查6例全部符合.结论:结肠充气后螺旋CT扫描对结肠肿瘤检出率高,能对病变进行分期,属无创检查,病人易于接受,值得推广,可用于结肠病变的普查.     

刚体地球极移和章动的联合动力学方程

以经典的刚体地球自转欧拉动力学理论为基础,通过引入章动坐标系相对惯性空间的运动,推导出了一个同时包含极移和章动的刚体地球自转联合动力学方程。在推导过程中首次考虑了高阶岁差章动力矩(摄动周期满足2d/3相似文献