一些被子植物小孢子小配子发生过程的细胞化学研究

植物的小孢子发生(包括减数分裂)和小配子发生过程的细胞-胚胎形态学的研究给人们揭示了很多重要的规律(如:相对染色体的配对与分离等等)。可是,迄今为止,我们对于这个过程的内在细胞生理变化却了解得不够,对于这个问题也仅有为数不多的文献报导。本文的目的是研究在小孢子和小配子发生的过程中,一些对细胞生活有重要意义的化学物质(如:核酸、蛋白质等)的动态,以便为进一步认识这个复杂的细胞发展过程提供资料。     

香蕉生物技术研究现状与展望

本文对香蕉生物技术研究现状进行了全面的概括,包括微繁殖、脱病毒、人工种子、诱变育种、单克隆抗体用于病毒检测、转基因受体及基因转化等,并对今后香蕉生物技术的发展重点进行了讨论。     

水稻抗白叶枯病基因及其在多代回交情况下的遗传规律的研究

随着水稻生产水平的提高,稻白叶枯病对 广东省商品粮稻区水稻生产的威胁也日益严 重,而抗病育种则是病害防治中的一项经济、省 工、收效大,并能减少环境污染的重要措施。因 此,选育既丰产、又抗病的水稻新品种是当前生 产的迫切需要。     

甜玉米、笋玉米的起源与遗传

甜玉米是由籽粒鲜嫩、糖份含量高的一类胚乳突变体转育而成的。笋玉米是指幼穗柔软、食用纤维丰富的一类多穗（甜）玉米,也有几种基因型,近二十年来发展迅速,和甜玉米一样,也已成为一种玉米产业。１甜玉米、笋玉米的起源、遗传与基因型关于甜玉米的起源时间,可以追溯...     

植物抗病毒基因工程的研究进展

自１９８６ 年首次成功获得转基因抗病毒植物以来,植物抗病毒基因工程的研究与应用在世界各地蓬勃发展。本文综述了国内外在这方面的研究进展及最新成就,以及此领域的存在问题和前景展望。     

巴西人参化学成分和药理活性研究进展

巴西人参原产于南美洲,当地人把它当做具有壮阳、增强体质等作用的草药。巴西人参已在我国广西、浙江等地引种栽培成功,现代研究发现,其主要含有三萜和三萜皂苷类、甾体类等多种化学成分,具有抗肿瘤、抗炎、保护胃黏膜等药理活性。本文通过对近年来巴西人参的研究情况进行综述,阐明已有的化学物质基础和药理作用,为其进一步的深入研究和开发提供理论依据。     

The efficacy of TKIs in treatment of human primary small cell lung cancer xenograft model in vivo

Objective: To study the treatmaient of non-small cell lung cancer, we established the HU-Prim allograft transplantation tumor model. Methods: The fresh tumor samples were transplanted in the right scapular subcutaneous layer of the severe combined immunodeficient Non-obese diabetic/severe combined immunodeficient(NOD/SCID) mice. The pathological features of the tumors were observed. Nonnecrotic tissue was inoculated subcutaneously into the right axillary. When the tumor in burdened rat grew approximately 100 mm3, according to the tumor size all the animals were divided into the following four groups, eight rats in each group: solvent control group, gefitinib group(100 mg/kg), erlotinib group(50 mg/kg), afatinib group(20 mg/kg). Aniamals were treated with drugs by intragastric(i.g.) administrated, once daily, for consecutively 14 days. Measure the tumor size 2-3 times every week. Results: Hu Prime1-NSCLC mutant sensitive xenograft model research data showed that reversible tyrosine kinase inhibitors gefitinib, erlotinib and irreversible tyrosine kinase inhibitor afatinib could effectively inhibit tumor growth in EGFR positive NSCLC allografts model. The pharmacodynamic activity of irreversible inhibitor was better than that of the reversible inhibitor. Specimens from clinical anthropogenic tumor retain characteristics of the human primary malignancy, histopathology, biological characteristics, and tumor markers, etc., which can more accurately reflect the characteristics of the tumor and the impact of interventions. Conclusion: The model is not only a good antitumor drug experimental platform, but also a new evaluation tool of individualized medication.