液晶模板法合CdS纳米线(英文)

以六方液晶为模板合成了CdS纳米线。纳米线生长在表面活性剂分子形成的六方堆积的空隙水相内，呈平行排布，直径为1-5nm。     

HAEMOPOIETIC PROGENITOR CELLS MEASURED BY LIMITING DILUTION IN MICROWELL CULTURE

Microwell culture assays, termed the "negative" well technique and the "positive" well technique have been used to measure the concentration of murine haemopoietic progenitor cells (HPC) by limiting dilution. Using morphologic examination and ~3H-TdR uptake, the number of HPC of Balb/c mice per 10~5 bone marrow cells was 33 and 31 respectively. The linear relation between the number of harvested cells and input ceils seen on the 4th and 7th days of culture reflected the growth of HPC in microwells     

STUDY ON INDUCTION OF DIFFERENTIATION OF A HUMAN MEGAKARYOBLASTIC LEUKEMIA CELL LINE (HIMeg) BY 1,25-DIHYDROXYVITAMIN D_3

It is reported that 1,25-dihydroxyvitamin D_3(1,25(OH)_2D_3), a physiological factor, has aninductive effect on the differentiation of a novel human megakaryoblastic leukemia cell line(HIMeg) in vitro. At the concentrations ranging from 10~(-9) to 10~(-6) mol/L, 1,25(OH)_2D_3 showedinhibition of proliferation on HIMeg cells which was demonstrated by count of survivalcells and cloning efficiency. Meanwhile, using light/electron microscopy, stain of cytochem-istry (including immunoenzymatic technique) and flow cytometry, we found that HIMeg cellscould be further induced into more mature cells in megakaryocytic lineage confirmed by aseries of evidence, including the changes of cell morphology/structure and cytochemistry,increased expression of differentiation antigens on the cell surface, and polyploidization.So, it is possible for 1,25(OH)_2D_3 to promote the differentiation of the cells in megakaryo-cytic lineage in vivo and to be used to treat acute megakaryoblastic leukemia and other di-seases with mal     

模板法制备硫化物半导体纳米材料

本文以聚氧乙烯类表面活性剂AEO-7形成的六方相液晶为模板分别制备出了CdS 和ZnS 纳米线及中孔结构的CdS及PbS;以阳极氧化铝位模板制备除了一系列硫化物半导体纳米线阵列。     

液晶模板法合成CdS纳米线

以六方液晶为模反合成了ＣｄＳ纳米线,纳米线生长在表面活性剂分子形成的六方堆积的空隙水相内,呈平行排布,直径为１．５ｎｍ     

ESTABLISHMENT OF A GROUP OF MURINE LEUKEMIC CELL LINES AND INVESTIGATION OF THEIR BIOLOGICAL CHARACTERISTICS

An in vitro-vivo technique for establishment of cell lines on murine leukemia has beendeveloped. Using this method, suppressive T lymphoblastic leukemia L7811-85, L7212-85, non-T, non-B lymphocytic leukemia L1210-86, B lymphocytic leukemia P 388-86 and Friend erythroleu-kemia FLCL cell lines have been established. Incidence of leukemia with these cell lines was 100%. Along with the increase of genera-tions of cell lines, cell growth accelerated, generation time shortened and cloning efficienciesrose. A following up electron microscopic observation on L7811-85 and L7212-85 showed thatthe virus particles were "A" particles in original cells. When they became cell lines in vitro,virus particles increased and transformed into typical "C" particles with budding. An inhibitory activity relevant to leukemic cells on proliferation of leukemic cells hasbeen observed in the supernatant of L7811-85 medium and was regarded as an "autocrine".     

极限稀释法微孔池培养测定造血前体细胞

根据极限稀释法(Limiting dilution)原理,应用微孔池培养无增殖细胞生长的“阴性池”及有增殖细胞生长的“阳性池”分析,测定了小鼠造血前体细胞Haemopoietic progenitor cells(HPC)在骨髓中的含量。以形态学及~3H-TdR参入率为指标所测定的Balb/c小鼠HPC的含量分别为33及31/10~5骨髓细胞。此外,在培养后4天及7天,按不同浓度接种的细胞数与收获细胞数之间呈现良好的线性关系,反映了在微孔池中HPC的增殖。本方法除用以测定在骨髓中的HPC含量以外,尚可用于分析各种培养条件、造血因子以及细胞毒药物等对其增殖和分化的影响。     

一组小鼠白血病细胞系的建立及生物学特性的研究

本支建立了一种经PHA-脾条件培养液刺激,在体外形成白血病干细胞克隆后,再经体内传代,发病后在体外连续培养建成白血病细胞系的新方法。采用此方法成功地建立了T抑制淋巴细胞白血病L7811-85,L7212-85细胞系,非T非B淋巴白血病L1210-86,B淋巴白血病P388-86及红白血病FLCL细胞系等。对上述细胞系进行了较系统的生物学特性研究。电子显微镜观察中发现,白血病细胞的病毒颗粒在体外传代时A型颗粒消失,C型颗粒出现。并发现在L7811-85细胞系培养上清液分离的组分中,有白血病相关抑制活性的存在。     

1,25(OH)_2D_3对人原始巨核白血病细胞系(HIMeg)的诱导分化研究

本文报道了生理性诱导剂1,25(OH)_2D_3对一株新建的人原始巨核白血病细胞系(HIMeg)的体外诱导分化作用。在浓度为10~(-9)—10~(-6)mol/L的1,25(OH)_2D_3作用下,活细胞计数、克隆形成率测定显示1,25(OH)_2D_3对HIMeg细胞有增殖抑制作用;同时,应用光/电子显微镜、细胞化学染色、免疫酶标、流式细胞分析等技术,从细胞形态结构、细胞化学、细胞表面分化抗原以及DNA倍体性诸方面证实了1,25(OH)_2D_3能诱导HIMeg细胞进一步分化成熟。从而提示:1,25(OH)_2D_3可能是体内巨核系的一个重要促分化因子,并可试用于治疗急性巨核细胞白血病等疾病。