共查询到20条相似文献，搜索用时 468 毫秒
1.
灵芝具重要的药用和食用价值,但野生灵芝的数量相当稀少且采集不易,因而灵芝的人工养殖已成为人们研究的热点.目前,灵芝的栽培技术已日趋完善,基本上分固体和液体两大培养方式.迄今为止,已从灵芝中分离到150余种化合物,其中三萜类物质灵芝酸是灵芝的主要有效成分之一,有止痛、镇静、抑制组织胺释放、解毒、保肝、毒杀肿瘤细胞等功能;灵芝多糖能提高机体免疫力,提高机体耐缺氧能力,抑制肿瘤,并能延年益寿等;灵芝腺苷衍生物有较强的降血液粘度的效果,能提高血液供氧能力和加速血液循环,提高血液、心、脑的供氧能力等. 相似文献
2.
3.
本文研究了稀土,碱金属添加物分咽在以氢型丝光沸石(HM)为载体的pt—v_2o_5催化剂、碱土金属氧化物(Cao)催化剂中对抑制积炭,促进甲烷氧化偶联反应的作用机理。发现:稀土以碱性,强供氧能力抑制酸中心和金属中心的积炭;碱金属以强供电子的能力诱导偶联催化剂活性组分o的生成而导致活性,选择性的提高. 相似文献
4.
5.
6.
《赤峰学院学报(自然科学版)》2021,(9)
近年来,关于灵芝的研究越来越多,通过一些研究发现,灵芝在提高免疫力、抗肿瘤以及缓解疲劳等方面具有很好的效果。除此之外,灵芝还具有降低血脂、血糖及抗氧化等作用。因此,灵芝不仅能够提高人体各项机能,还能以灵芝提取物、破壁灵芝孢子粉为原料,研发多种类型的灵芝功能性食品。本文以灵芝功能性食品的研发与应用为研究对象,探讨灵芝功能性食品的研发与应用路径,以期为灵芝功能性食品的研发与应用提供参考和建议。 相似文献
7.
2001年高考理科综合能力测试第2题,题目如下:
运动员在进行不同项目运动时,机体供能方式不同.对三种运动项目的机体总需氧量,实际摄入氧量和血液中乳酸增加量进行测定,结果如下: 相似文献
8.
实验结果表明:蓝宝(螺旋藻)营养液含丰富蛋白质、β-胡萝卜素、叶绿素、多糖、维生素、人体必需氨基酸、微量元素及生理活性物质;能明显促进肠胃蠕动;降低胆固醇和血脂含量;提高机体恢复疲劳和耐高、低温应激能力;增强机体免疫功能,延缓衰老,提高记忆能力:对肝损伤具有保护作用等显著保健功效。 相似文献
9.
应用游泳耐受实验、耐缺氧实验及透射电镜研究了小鼠服用EU后骨骼肌超微结构中线粒体的改变及对过度训练造成的线粒体损伤的预防和提高运动能力的关系,结果显示EU能使小鼠游泳耐受力和耐密闭缺氧能力大为提高,使小鼠骨骼肌内线粒体数量增多,体积增大,能明显改善竭力运动后的线粒体破碎和空泡化现象,并且能使线粒体在肌原纤维之间纵行排列,靠近Z线.这些对运动训练中供氧器官线粒体的改变对预防线粒体的损伤和提高运动能力均有着非常重要的作用. 相似文献
10.
鲮鱼是华南地区重要的经济鱼类之一,本实验测定了不同水温(21℃、14℃、9～7℃)条件下鲮鱼血液几种无机成份、血糖含量、血液学参数、血液的理化特性等一系列变化,以了解水温对鲮鱼血液成份及其机能活动的影响,探讨鲮鱼在较低水温下死亡的生理因素。结果表明:水温降低引起肌肉含水量、血糖含量上升,血液含水量及血浆钠、钙、镁、磷等浓度均明显下降;血浆相对粘度增大,红细胞电泳率下降,不利于血液的运输和对组织的供氧,红血球数、血红旦白含量,平均红细胞血红旦白含量明显上升。上述结果反映出水温变化对鲮鱼血液成分及其循环机能的影响,水—电解质水平下降,血液相对粘度增大,供氧不足可能是造成鲮鱼在水温较低时死亡的主要生理因素。 相似文献
11.
邱崇丙 《唐山师范学院学报》2014,(1):21-23
汉字的六书,《说文》对“转注”一类,语焉不详。后世学者提及转注,也仅限于许慎所举出的例字。《汉字例说》一文,作者从转注的角度综合考虑,对部分现代常用字作了分析,跟传统的解释有所不同。希望能抛砖引玉,互相切磋,以推进学术研究。 相似文献
12.
13.
14.
《海外英语》2007,(5):10-11
Many college freshmen arrive woefully unprepared to do college work, and as disadvantaged populations continue to grow, the share of the American work force that has made it through college is expected to plummet. Many experts blame that educational failure not just on high schools but also on colleges. School & College, a special report by The Chronicle, looks at efforts to fix the system. What reforms would better prepare students for college? What should schools and colleges be doing differently? How should state and federal officials help? 相似文献
15.
Rachel Zupek 《海外英语》2007,(11):40-41
我们绝大部分人都同意一件事情——我们喜欢金钱。但是你对金钱的喜欢之情足够到让你创立一份事业么?.财富通常被人忽视,主要在于人们不能真正了 相似文献
16.
YANGShiguo 《重庆大学学报(英文版)》2004,3(1):86-88
The problem on the geometrc inequalities involving an n-dimensional simplex and its inscribed simplex is studied. Aninequality is established, which reveals that the difference between the squared circumradius of the n-dimensional simplex andthe squared distance between its circumcenter and barycenter times the squared circumradius of its inscribed simplex is not lessthan the 2(n-1)th power of n times its squared inradius, and is equal to when the simplex is regular and its inscribed siplex is atangent point one. Deduction from this inequality reaches a generalization of n-dimensional Euler inequality indicating that thecircumradius of the simplex is not less than the n-fold inradius. Another inequality is derived to present the relationship betweenthe circumradius of the n-dimensional simplex and the circumradius and inradius of its pedal simplex. 相似文献
17.
《海外英语》2007,(4):36
There are numbers of crossroads on our long and unpredictable life journey where we totally have no idea about which direction to choose. No matter what our decision is, we should not turn back, but face the music and go ahead instead. I am this kind of girl who always does try without regretting, one example is how I dealt with my love. 相似文献
18.
Migration occurs behind a variety of reasons and has a great effect on the whole world. People may migrate in order to improve their economic situation, or in order to escape civil strife, persecution, and environmental disasters. The impact of migration is complex, bringing both benefits anddisadvantages. This paper briefly talks about the causes of migration, the allocation of benefits, and the ways in which individual countries and the international community deal with this important subject. 相似文献
19.
20.
GUO Bao-feng Xiao Da-wei 《重庆大学学报(英文版)》2005,4(3):129-133
Using virtual reality for interactive design gives a designer an intuitive vision of a design and allows the designer to achieve a viable, optimal solution in a timely manner. The article discusses the process of making the Virtual Reality System of the Humble Administrator＇s Garden. Translating building data to the Virtual Reality Modeling Language （VRML） is by far unsatisfactory. This creates a challenge for computer designers to do optimization to meet requirements. Five different approaches to optimize models have been presented in this paper. The other methods are to optimize VRML and to reduce the file size. This is done by keeping polygon counts to a minimum and by applying such techniques as object culling and level-ofdetail switching. 相似文献