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金色补血草花色素抗氧化活性及抑菌作用研究 总被引:3,自引:0,他引:3
金色补血草(Limonium aureum)别名:黄花矾松、金匙叶草,属蓝雪科(Plumbaginaceae)多年生草本植物,分布于甘肃、青海、内蒙古等省.其全草可入药,性平、味甘,具有补血、活血、止血及抗癌等功效.金色补血草地上部分的主要化学成分为高北美圣草素、柚皮素、北美圣草素、杨梅树皮素-3-O-β-D-葡萄糖甙、杨梅树皮素-3-O-β-D-半乳糖甙.笔者对甘肃民勤金色补血草花色素成分进行初步分析,其含有酚类和黄酮类物质,并对金色补血草花色素抗氧化活性及抑菌作用进行了研究,以期为拓宽金色补血草资源的开发利用提供依据. 相似文献
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稗属植物种质资源及应用价值研究进展 总被引:2,自引:0,他引:2
稗属(Echinochloa)植物是一种繁殖力强、生态适应性广的草本植物,在全世界均有大面积分布,因其危害多种农作物的生长,过去多把稗属植物看作恶性杂草来研究。稗属植物除作为杂草外,还具有很高的饲用价值,其营养丰富,草质柔嫩,适口性好,是发展绿色畜产品的新型优质牧草。本文综述了稗属植物种质资源分布和系统进化的研究概况,从形态学水平、细胞学水平、生化水平和分子水平上总结了稗属植物遗传多样性的研究进展,并着重介绍了稗属植物的经济价值和优良基因的利用。分析了我国稗属植物种质资源研究存在的问题及发展前景,指出今后应加强对稗属植物种质资源搜集、分类、遗传多样性、基因组学的研究和饲用稗草的开发利用。 相似文献
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山东盐碱地上的夏秋季蜜源植物——补血草 总被引:1,自引:0,他引:1
《蜜蜂杂志》2000,(6)
补血草[Limoniumsienense(Girard).Kuntze]别名中华补血草、碱蔓菁、花子柴、盐云草等。为白花丹科补血草属的植物,分布于我国滨海各省区,生长于沿海和内陆的盐碱地上,是盐碱土指示植物。山东省的盐碱土约106.6万hm2(1600多万亩),多分布在鲁西、鲁北平原区和渤海湾沿岸。补血草为野生植物,在山东省的盐碱地上成片生长,分布集中而且数量很大,构成盐碱地上主要的蜜源植物。其嫩叶及根可食,全草可入药,有收敛、止血、清热、祛湿的功效。一、形态特征补血草为多年生草本,随着生境盐分和气候条件… 相似文献
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本文通过对海晏县景天属植物的调查,对这3个种的药用价值进行了归纳、总结。因其具有极高的药用价值,在青藏高原发挥着十分重要的补血充氧作用。但是景天属植物在海晏县分布面积小,保护、开发和利用还不到住。因此,研究景天属植物的药用功效,并加以开发利用,对长期生活、工作在青藏高原的人们具有重要的意义。 相似文献
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【目的】植物区系分析是科学开发利用和保护植物资源的重要前提。祁连山金强河流域位于青藏高原与黄土高原交界处,区位特征独特,莎草科(Cyperaceae)植物作为该地区的优势植物,对其进行资源调查和区系分析尤为重要。【方法】通过搜集文献、核实鉴定馆藏植物标本,编制祁连山金强河流域莎草科植物名录,分析莎草科植物科属特征和区系成分。【结果】祁连山金强河流域莎草科植物共有 6 属 53 种(4 变种),其中,多种属 2 个,为薹草属(Carex)和嵩草属(Kobresia),寡种属 1 个,为扁穗草属(Blysmus),单种属 3 个 ,为三棱草属(Trichophorum)、细莞属(Bolboschoenu)和蔺藨草属(Isol- epis),特有种 9 种;从各属包含的种数上来看,单种属和寡种属所含种的比例只占 5. 66 %和 3. 77 %,而多种属所含种的比例达到 90. 57%,占据明显的主导地位;植物区系成分包括世界分布型和北温带型 2 个分布区类型,世界分布型有 4 属 40 种,北温带型有 2 属 13 种。【结论】祁连山金强河流域莎草科植物区系成分总体简单,但莎草科植物资源丰富,特有种和世界分布型植物数量较多,具有重要的开发利用潜力。 相似文献
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魏静 《四川畜牧兽医学院学报》2009,(4):28-32
在现代法律秩序中,商会自治规范是制定法的基础和必要的补充,甚至在某些方面替代了制定法;商会自治规范主要包括商会组织规范、行为规范、惩罚规范以及争端解决规范等;其效力仅及于其内部成员;商会自治规范和制定法之间存在冲突,但也存在整合的基础。 相似文献
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本文概述了猪的毛色类型、猪的毛色遗传模式,着重综述了猪毛色基因分子基础的研究进展,指出存在问题并就未来发展方向做了思考。 相似文献
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REASONS FOR PERFORMING STUDY: Centesis of the bicipital bursa using an 8.9 cm long spinal needle has been reported but the alternative of employing a 3.8 cm long hypodermic needle requires validation. OBJECTIVE: To compare the efficacy of 2 different methods of centesis of the bicipital bursa and to evaluate the usefulness of ultrasonographic imaging to determine the location of solution administered when centesis of the bursa is attempted. METHODS: For Trial 1, 6 clinicians, who had no previous experience of centesis of the bicipital bursa, attempted to inject a solution composed of an aqueous radiopaque contrast medium and physiological saline solution (PSS) into the bicipital bursae of 2/12 horses using the previously described distal approach to inject one bursa and a proximal approach to inject the contralateral bursa. The bicipital tendon and bursa were examined ultrasonographically before and after injection; and both shoulders were examined radiographically to identify the location of the medium. In Trial 2, another 6 clinicians, also with no previous experience of centesis, repeated Trial 1, using 6 horses, but the radiopaque contrast medium was mixed with air instead of PSS. RESULTS: Accuracy of centesis using the proximal approach was 39% and that of the distal approach 28%. Ultrasonographic examination of the shoulder allowed the location of solution and air to be accurately predicted in all 12 shoulders examined. CONCLUSIONS: Clinicians who have had no previous experience performing centesis of the bicipital bursa are unlikely to be successful in centesis using either approach. Radiographic examination after injecting a radiopaque contrast medium may be necessary to assess the success of centesis especially if bursal fluid is not obtained during centesis. Injecting air along with the radiopaque contrast medium provides more accurate ultrasonographic confirmation of centesis and better radiographic definition than does injection without air. 相似文献
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Effects of size of ingestively masticated fragments of plant tissues on kinetics of digestion of NDF
Ingestively masticated fragments were collected and sized via sieving. Different sizes of esophageal masticate and ruminal digesta fragments, and ground fragments of larger masticated pieces were incubated in vitro, and undigested NDF remaining at intervals of up to 168 h of incubation was determined. The ruminal age-dependent time delay (tau) for onset of digestion of NDF was positively correlated (P < 0.004) with the mean sieve aperture estimated to retain 50% of the fragments between successive sieve apertures (MRA). Degradation rate of potentially degradable NDF (PDF) and level of indigestible NDF were not related (P > 0.10) to MRA of masticated and ground fragments. Estimates of tau were positively related to MRA, with slopes of bermudagrass < corn silage < ruminal fragments of corn silage. It was concluded that fragment size-, and consequently, ruminal age-dependent onset of PDF degradation of a mixture of different fragment sizes results in an age-dependent rate of degradation of the more rapidly degrading of two subentities of PDF. Models are proposed that assume a tau before onset of simultaneous degradation of PDF from two pools characterized as having gamma-modeled age-dependency and age-constant rates. The ruminal age-dependent pool seems to be associated with the faster-degrading pool, and its rate parameter increases with range in MRA in the population of fragments. Conceptually, the ruminal age-dependent rate parameter for PDF degradation seems to represent a composite of several effects: 1) effects of the size-dependent tau; 2) range in MRA of the population of ingestively masticated fragments; and 3) subentities of PDF that degrade via more rapid age-dependent rates compared with subentities of PDF that degrade via age-constant rates. The estimated fractional rates of ruminative comminution of ingestively masticated fragments (0.060 to 0.075/h) were of a magnitude similar to the mean fractional rates of PDF digestion (0.030 to 0.085/h), which implies that ruminative comminution may be first-limiting to fractional rate of PDF digestion. The in vivo roles of ingestive and ruminative mastication of fragments on PDF degradation must be considered in any kinetic system for estimating PDF digestion in the rumen. These results and others in the literature suggest that the rate of surface area exposure rather than intrinsic chemical attributes of PDF may be first-limiting to degradation rate of PDF in vivo. 相似文献
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乳酸杆菌作为益生菌广泛用于人和动物.本文综述了乳酸杆菌改善宿主健康的机制.乳酸杆菌可通过产生抗菌物质如乳酸、过氧化氢、细菌素,或者通过竞争营养或肠道黏附位点来抑制致病菌;通过诱导黏附素的分泌或阻止细胞凋亡而增强肠道的屏障功能,从而保护肠道.文章重点讨论了乳酸杆菌表面成分(表面蛋白、脂磷壁酸和肽聚糖)与肠道受体(C型凝集素受体、Toll样受体和Nod样受体),阐述了他们结合后启动免疫调节信号,调控肠道免疫功能以发挥改善健康作用的机制. 相似文献