胡椒醛缩氨基芳酸希夫碱的合成与表征

用胡椒醛与氨基酸进行缩合反应,制备了５种胡椒醛氨基芳酸希夫碱化合物。对所得化合物进行了元素分析、用红外光谱和核磁共振氢谱对化合物结构进行了表征。     

美极炸酱面

海鲜吃多了,会觉得腥;猪肉吃多了,会觉得腻;火锅吃多了,会觉得燥……那么,炸酱面呢?我是百吃不厌,越吃越爱吃。     

山胡椒属系统的研究

 This paper is an attempt to discuss the relationship and phylogeny within the genus Lindera, based upon on analysis of shortened brachlets, on which the inflorescences are inserted, and other morphological characters. The shortened branchlets are metamorphic shoots which are often at the transitional stage between branchles and inflorescences. The advanced shortened branchlets usually with an undeveloped terminal bud, posses scale-like leaves, and the inflore- scences so formed are sessile and aggregate.  In primitive taxa, such as Lindera nacusua (Don) Merr., L. gracilipes H. W. Li and L. tanchuanensis Feng et H. S. Kung, the branchlet is usually not shortened, with well-developed terminal bud, forming a single axillary pseudo-umbel, while its peducle is usually very slender and stamens of pistillate flower sometimes more or less deve- loped.  The leaves on the upper part of branchlet are normal and the lower part of branchlet becoming bracteal,  In the genus the development of shortened branchlets (Fig. 1.) from the ones in the primitive taxa to the ones in the advanced taxa may be found.        Other important morphological characters are the length of peducles.   The peduncle is usually slender in the primitive taxa, short or even sessile in the adanced taxa.        There are two types of venation in the genus: the pinnate and trinerved.  As the primitive group trib. Perseeae Mez shows pinnate veins, pinnate ventation in Lindera is more primitive than trinerved one.        It might be possible that a transition occure in the genus from evergereen habit to deciduous one as shown in Lindera glauca B1., L. angustifolia Cheng and L. praecox B1., whose leaves tar- dily wither but persistent over winter.        The relationships within Lindera are shown in a hypothetical genealogical tree (Fig. 4), which includes the system of Litsea, developed parallelly with Lindera.        From the study of morphological characters, the author infers that both Lindera and Litsea have originated from a common ancestory related to the tribe Cinnamomeae Baill. which has a single axillary inflorescence, with hermaphrodite flowers, 4-locular anthers and penninerved to trinerved leaves.     

唐朝巨贪元载积攒胡椒60多吨

正公元777年(唐大历十二年)三月,宰相元载伏诛。他被押往万年县行刑,刽子手开刀问斩之前,循例要问:相公,可有什么遗言和要求,且说无妨。元载说他只有一事,唯求速死。刽子手说,那倒不难,不过要委屈相公。于是,剥下他的臭袜子,塞进他的口中。然后,刀光一闪,人头落地。唐之元载,宋之蔡京,明之严嵩,清之和珅,应该算得上是中国历史上数得着的权奸兼巨贪。但蔡、严、和三位,     

萎叶提取物增强5-氟尿嘧啶对结肠癌细胞HT29和HCT116的生长抑制作用

研究目的：探讨萎叶（PB）提取物对5-氟尿嘧啶（5-FU）抑制结肠癌细胞HT29和HCT116生长的影响。研究方法：HT29和HCT116细胞分别给予PB、5-FU以及两种药物联合治疗24小时,应用等效线图法分析PB和5-FU的药效学相互作用,AnnexinV／PI染色法检测HT29和HCT116细胞的凋丁L=情况,高效液相色谱法排除PB和5-FU间任何可能的相互化学作用。重要结论：联合PB,低剂量5-FU可以在短时间内起到细胞毒作用,而单独应用PB或5-FU治疗较联合治疗可以诱导更多细胞发生凋亡。进一步采用等效线图法分析显示PB和5-Fu的联合作用在抑制结肠癌细胞HT29和HCT116的生长中分别体现出协同和拮抗作用。因此可以认为在HT29细胞中,PB使得较低剂量5-FU发挥最大抑制结肠癌细胞生长效果,然而在HCT116细胞中,PB没有显著降低5-FU的药物浓度,说明PB和5-FU的相互作用不仅仅体现在诱导细胞凋亡方面。     

冬日喝汤有讲究

中国有句俗语说得好:"无汤不成宴",国人吃饭时少不了的就是汤汤水水,尤其是在寒冷的冬日里,喝上一碗热气腾腾、美味滋补的靓汤,不仅能让味蕾得到极大满足,还有助于驱走寒气。那么冬天里喝汤都有哪些讲究?又有哪些美味和营养兼俱的上佳汤品可以暖胃暖心呢?