汕头市水库库区维管植物资源调查分析

文章介绍了广东省汕头市水库库区有维管植物142科384属592种,其中野生维管植物有139科370属570种,包括药用植物468种、观赏植物358种、油脂植物65种、纤维植物47种、植物蛋白质和氨基酸植物44种、鞣料植物37种、芳香油类植物29种、植物胶与果胶植物17种、淀粉植物14种、维生素类植物6种、植物色素类植物5种、糖与非糖甜味剂植物4种、树脂类植物4种、橡胶与硬橡胶植物3种,国家重点保护野生植物和珍稀濒危植物资源6种,并对其资源特点进行了分析、对其开发利用和保护提出了建议。     

平菇菌丝体生长代谢调控的研究进展

从培养基的配方、微量元素的添加、工业废料的利用、植物生长调节剂的调节、农药的应用、环境污染和辐照因素等方面,综合论述了近几年来人们对平菇菌丝体生长代谢影响因素的研究进展。     

创建节约型医院图书馆

分析了创建节约型医院图书馆的 必要性,提出了创建节约型医院图书的主要措施及应该注意的问题。

     

基于AutoCAD和Photoshop的林业制图

介绍Auto CAD和Photoshop软件的特点,从绘图空间设置、底图录入调整、底图矢量化、数据库建立、各类专题图绘制、绘图比例设置及后期效果处理及出图等方面论述了其在林业制图上的应用方法及技巧。并就2种制图软件的优缺点以及2种软件综合应用的优势进行了讨论。     

饲粮蛋氨酸水平对28～70日龄狮头鹅血清生化指标及抗氧化功能的影响

本试验旨在研究饲粮蛋氨酸水平对28～70日龄狮头鹅血清生化指标及抗氧化功能的影响。选择720只28日龄的健康狮头鹅,随机分为6组,每组6个重复,每个重复20只鹅。各组分别饲喂蛋氨酸水平为0.26%、0.36%、0.46%、0.56%、0.66%、0.76%的试验饲粮。试验期42 d。结果表明:1)饲粮蛋氨酸水平对平均日增重和平均日采食量影响不显著(P>0.05),0.56%和0.66%蛋氨酸水平组料重比显著低于0.26%蛋氨酸水平组(P<0.05)。2)饲粮蛋氨酸水平对血清总蛋白、白蛋白、球蛋白、尿酸、甘油三酯和高密度脂蛋白含量影响不显著(P>0.05)。0.76%蛋氨酸水平组血清低密度脂蛋白含量显著低于0.26%蛋氨酸水平组(P<0.05),但与其余各组差异不显著(P>0.05)。3)0.66%蛋氨酸水平组血清谷胱甘肽过氧化物酶活性显著高于其余各组(P<0.05);0.66%蛋氨酸水平组血清谷胱甘肽含量与0.76%蛋氨酸水平组差异不显著(P>0.05),但显著高于其余各组(P<0.05);0.66%蛋氨酸水平组血清超氧化物歧化酶活性显著高于0.26%蛋氨酸水平组(P<0.05),血清丙二醛含量显著低于0.26%、0.36%蛋氨酸水平组(P<0.05)。4)随着饲粮蛋氨酸水平提高,血清谷胱甘肽过氧化物酶活性呈二次曲线升高(P<0.05),估测饲粮蛋氨酸水平为0.654%时,28～70日龄狮头鹅血清中谷胱甘肽过氧化物酶活性达最大值。由此可见,提高饲粮蛋氨酸水平可以显著提高28～70日龄狮头鹅抗氧化功能,饲粮蛋氨酸适宜水平为0.66%。     

电子商务环境下饲料业物流管理与优化策略

电子商务给人们生产生活方式带来了巨大便利,当然也给传统农牧业的发展带来了新的挑战,饲料业作为农牧业中重要的一部分,在电子商务环境下想要更好的发展,离不开物流运营。当前,我国饲料业物流运营模式依然遵循传统的物流模式,效率较低,成本较高,极大阻碍了电子商务环境下饲料业的生存和发展,因此,我们要基于4PL物流管理模式,创新物流运营流程,强化人才队伍素质,提升电子商务环境下饲料业物流运营效率,高效节约运营成本,完成物流运营性能优化。     

Effects of tanshinone IIA on proliferation,apoptosis and expression of HIF-1α, VEGF and wild-type P53 in human hepatoma HepG2 cells under hypoxia

AIM:To investigate the effects of tanshinone IIA (Tan IIA) on proliferation, apoptosis and its molecular mechanism in human hepatoma HepG2 cells under hypoxic condition. METHODS:Hypoxia model was established by treatment with cobalt chloride (CoCl2). The cells were divided into normoxia control group, hypoxia control group and hypoxia combined at different concentrations of Tan IIA groups. After HepG2 cells were incubated with different concentrations of Tan IIA (0.5, 1.0, 2.0, 5.0 and 10.0 mg/L) for 24 h, 48 h and 72 h under hypoxic condition, the cell proliferation was determined by MTT assay. After Tan IIA was added to the media at different concentrations for 24 h and 48 h, the apoptotic cells were observed by Hoechst 33258 staining. The protein levels of hypoxia-inducible factor 1 alpha (HIF-1α), vascular endothelial growth factor (VEGF) and wild-type P53 were detected by Western blotting after cultured with different concentrations of Tan IIA for 48 h. RESULTS:Tan IIA inhibited the proliferation of HepG2 cells in a dose- and time-dependent manner. Tan IIA induced the typical morphology of apoptotic cells and increased the apoptotic rate in a dose- and time-dependent manner after treatment with 1.0 mg/L~5.0 mg/L for 24 h and 48 h under hypoxic condition. The protein levels of HIF-1α and VEGF were weakly expressed in HepG2 cells under normoxia but up-regulated after incubated under hypoxia for 48 h. The protein expression of HIF-1α and VEGF were decreased with the increase in the concentration of Tan IIA under hypoxia. The protein expression of wild-type P53 was increased with the increase in the concentrations of Tan IIA under hypoxia. CONCLUSION: Tan IIA significantly inhibits the proliferation and induces the apoptosis of human hepatoma HepG2 cells under hypoxia, which may be related to the down-regulation of HIF-1α and VEGF and up-regulation of wild-type P53.     

Etiology and characteristics of community-acquired pneumonia in an influenza epidemic period

PurposeThe etiology of community-acquired pneumonia (CAP) in hospital patients is often ambiguous due to the limited pathogen detection. Lack of a microbiological diagnosis impairs precision treatment in CAP.MethodsSpecimens collected from the lower respiratory tract of 195 CAP patients, viruses were measured by the Single-plex real-time PCR assay and the conventional culture method was exploited for bacteria.ResultsAmong the 195 patients, there were 46 (23.59%) pure bacterial infections, 20 (10.26%) yeast infections, 32 (16.41%) pure viral infections, 8 (4.10%) viral-yeast co-infections, and 17 (8.72%) viral-bacterial co-infections. The two most abundant bacteria were Acinetobacter baumannii and klebsiella pneumoniae, whereas the most common virus was influenza A.ConclusionsNon-influenza respiratory microorganisms frequently co-circulated during the epidemic peaks of influenza, which easily being ignored in CAP therapy. In patients with bacterial and viral co-infections, identifying the etiologic agent is crucial for patient’s therapy.     

TNF-α对下丘脑神经元的影响研究进展

介绍了肿瘤坏死因子TNF-α的发现、结构及其作用的信号通路,并从神经元的发育、生存、离子平衡和神经递质释放等方面综述了近年来TNF-α对下丘脑的影响研究进展.     

家与园融合共生的住区景观营造——以南昌市香域滨江社区园林规划建设为例

通过南昌香域滨江住宅区项目的实践案例分析,探讨如何通过建筑与园林的协调,引入自然生态的造景元素,将安全舒适的良好生活环境和生态自然景观融为一体,营造一个人与自然和谐、"家"与"园"共生的理想居住环境空间。