共查询到20条相似文献，搜索用时 468 毫秒
1.
兼震南 《聪明泉(少儿版)》2002,(12)
“鄱阳湖的草，南昌人的宝”，这是南昌地区家喻户晓的一句民间谚语。 这“草”指的是“藜蒿”草。藜蒿草生长在江西鄱阳湖湖滨草洲上，属草本植物，生长期只有两个月左右，真是来也匆匆，去也匆匆。据明代药物学家李时珍介绍，“藜蒿”入药可御寒。南昌初春寒冷，有时还大雪纷飞，吃上一盘“藜蒿炒香肠”，既饱口福，又抵寒气，真美。 说起藜蒿炒香肠，据说还有一个传说：唐朝著名的治水专家许逊随父避乱，由河南迁居南昌宝田——今天的南昌市新建县西山。一天，他来到鄱阳湖一个地势高峻的孤岛上探察时，突然刮起了大风，在湖岛… 相似文献
2.
《小雪花(小学生成长指南)》2003,(13)
几何王国今天真热闹，这么多图形聚在一起，它们要进行选美比赛。可是熊裁判不小心把它们的英文名字都弄乱了。你能把这些图形和它们的英文名字一一对应吗？triangle［＇trai覸耷弈l］rectangle［＇rek謣t覸耷弈l］square［skw藓藜］circle［＇s藜蘼kl］oval［＇藜uv藜l］形状总动员 相似文献
4.
初中二册语文志南《绝句》中“杖藜扶我过桥东”一句,其中的“杖藜”课本上注解为:“[杖藜]拄着拐杖。杖,拄着。”(见课本296页注⑥)显然是把“杖藜”当作动宾结构了,这是不对的。其实,“杖藜”在这里就是“藜杖”的意思,这是为了符合绝句对平仄的要求而故意颠倒了两个词的词序。“杖”是名词,“藜”乃是它的后置定语,两者实质上是定语与中心词的关系。“杖藜”就等于“藜杖”,它是句子的主语,不过诗人运用拟人修辞手法把“杖”人格化了。“扶”是句子的动 相似文献
5.
目的:研究东北藜蒿提取物的体外抗菌作用。方法:采用试管稀释法测定东北藜蒿提取物水煎剂、醇提物对13种临床常见病原菌的最低抑菌浓度(MIC),判定抗菌效果。结果:东北藜蒿水煎剂、醇提物对13种临床常见病原菌均有不同程度的抗菌作用。结论:东北藜蒿提取物在体外有一定抗菌作用。 相似文献
6.
冬梅 《小雪花(小学生成长指南)》2003,(13)
CharactersChickenHenCockDuckGooseRabbitandFox．ActIScene:inthewoodscharacter［＇k覸rikt藜］n人物rabbit［＇r覸bit］n兔子scene［si:n］n场景，布景narrator［n藜＇reit藜］n叙述人suddenly［＇s蘧dnli］adv突然地pinecone［＇paink藜un］n松果fall［f蘅蘼l］v落下quickly［＇kwikli］adv快速地soon［su:n］adv很快meet［mi:t］v遇到chorus［＇k蘅:r藜s］adv一齐，同时join［d廾蘅in］v参加comealongwith和．．．．．．一起来showsbtheway给某人带路；告诉某人怎样到达某处hole［h藜ul］n洞lead［li:d］v带领deep［di:p］adj深… 相似文献
7.
在超声波辐射下，用杂多酸催化过氧化氢氧化乳酸乙酯制备丙酮酸乙酯。重点考察了反应温度、反应时间．反应物配比、过氧化氢浓度和杂多酸的用量对产率的影响。当过氧化氢和乳酸乙酯的摩尔比为0．01：0．01(mol/mol)，杂多酸的用量为0．025g，在55℃超声辐射30min，丙酮酸乙酯的产率达59．2％。 相似文献
8.
《初中生学习》2005,(9)
Agreem ent[藜謖gri蘼m藜nt]主语和谓语在人称、数上的一致,关系代词与先行词的一致。A m biguity[摭覸m bi謖gju蘼藜ti]:尽量不去使用可能引起歧义的词语或句子。B rief[bri蘼f]:文章“简为贵”,要抓住要点,简明扼要。C oherence[k藜u謖hi藜r藜ns]:文理通顺,前后连贯。D evelopm ent[di謖vel藜pm藜nt]:主题的发挥应当充分、合理、正确。D ivision[dai謖v廾蘼蘩n]:词汇、句子、段落要分配使用得当,划分要清楚,避免使用重复字句。Figures[謖fig藜(r)]:正确合理使用各类修辞格式。Inflated[in謖fleitid]dic-tion:不使用做作的语言。K ey[k… 相似文献
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Patient:Yousaycarrotisgoodforeyesight.Isthattrue?Doctor:Certainly.Haveyoueverseenrabbitswearingglasses?Customer:Iwonderifthismilkisfresh.Waiter:Fresh?ThreehoursagoitwasGRASS!注释:carrot['k覸r藜t]n胡萝卜begoodfor对……有好eyesight['ai謣sait]n视力certainly['s藜蘼t藜nli]adv确,当然wear[w藓藜]v穿,戴让“笑笑街”洒满你欢乐的笑声!想练英语得奖品的小朋友,请快快参与把你的译文寄过来,地址是:哈尔滨市南岗区阿什河街11号《小学趣味英语》“笑笑街”收邮编:150001 Freshwonder['w蘧nd藜]v想知道,惊奇fresh[fre蘩]… 相似文献
11.
综述女贞子提取物的生物学功能,分析女贞子提取物的结构与运动能力的关系,探讨服用女贞子提取物对大强度耐力训练大鼠体内羟自由基和超氧阴离子自由基清除过程的作用,为女贞子作为运动补剂的开发利用提供理论依据。 相似文献
12.
研制成功一种以沥青厂抽出油馏分为基础油,自乳化力强、成本低的新型金属切削乳化油以该油制得的乳化切削液符合GB-6144—85标准,实用性能好． 相似文献
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14.
白饭树(Flugea virose(Roxb ex willd) Baill [F, mierocarna Bl.])水提物对CCl_4造成的小鼠、大鼠急性肝损伤具有明显的保护作用,可使中毒鼠血清中GPT,GOT,ALP,LDH等酶的含量显著下降或趋于正常;对CCl_4所致肝脏脂质过氧化作用具明显的缓解作用,并提高CCl_4损伤肝的解毒能力. 相似文献
15.
刘晓蓉 《广东轻工职业技术学院学报》2002,1(1):19-21,50
用乙醇、乙醚和水3种溶剂对虎杖进行提取。采用一系列真菌和细菌，测试虎杖提取物的抑菌作用，与苯甲酸钠的抑菌效果相比较，并选择有代表性的食品进行防腐试验。结果表明：虎杖提取物对所试细菌有较强的抑制作用，而对霉菌的抑制作用却不如苯甲酸钠明显；对食品的防腐效果良好。并确定了虎杖提取物的最低抑菌浓度。 相似文献
16.
A support vector regression based on the mean impact value (MIV) model was constructed to identify the bioactive compounds inhibiting proliferation of HeLa cells in a combination of turmeric (Curcuma longa L.) and liquorice (Glycyrrhiza) extracts. The quantitative chemical fingerprint from 50 batches of turmeric and liquorice extracts was established using high performance liquid chromatography hyphenated to an ultraviolet visible detector. Qualitative results were obtained using ultra performance liquid chromatography coupled with electrospray ionization quadrupole time-of-flight tandem mass spectrometry. A total of 46 peaks (peaks 1–15 from turmeric and 16–46 from liquorice) were selected as “common peaks” for analysis. The inhibitory effect of the combined extracts on HeLa cells was measured by MTT (3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide) assay. It was found that 15 compounds (peaks: 8, 12, 30, 24, 46, 11, 14, 9, 3, 1, 44, 18, 7, 45 and 43) possessing high absolute MIV exhibited a significant correlation with the cytotoxicity against HeLa cells; most of these have already been confirmed with potential cytotoxicity in previous research. The important potential application of the present model can be extended to help discover active compounds from complex herbal medicine prior to traditional bioassay-guided separation. It is considered that this could be a useful tool for re-developing herbal medicine based on the use of these active compounds. 相似文献
17.
John Huckle 《Environmental Education Research》1995,1(3):291-304
This article is a shortened version of one prepared as background to a presentation which the author was invited to give at the International Conference on Environmental Education held in Guangzhou in December 1994. It uses video extracts about environment and development issues in China to explore how television can best be used with interactive teaching techniques to further the aims of a critical education which promotes sustainable development. The article introduces some of the central concepts of media education and describes classroom activities which environment and development educators have borrowed and adapted from this field. Readers may be frustrated by not having the video extracts to watch as they read the article, but their interest may be increased by knowing that the Guangzhou Environmental Protection Board censored the author's presentation on his arrival at the conference. The original article was cut from the proceedings and the interactive presentation was taken out of the programme. 相似文献
18.
以蒸馏水、甲醇、乙酸乙酯为溶剂,提取襄麦冬活性物质,并分别测定提取物对以下5种病原真菌：立枯丝核菌Rhizoctonia solani,灰葡萄孢菌Botrytis cinerea,齐整小核菌Sclerotium rolfsii,终极腐霉Pythium ultimum,尖镰孢菌黄瓜转化型Fusarium oxysporum f.sp cucumber菌丝生长和孢子萌发的抑制作用.结果表明襄麦冬的三种溶剂提取物对灰葡萄孢菌、终极腐霉、立枯丝核菌的菌丝生长均具有较强的抑制作用,而上述相同浓度的提取物对齐整小核菌、尖镰孢菌黄瓜转化型的生长未表现出明显的抑制效果.同时,三种溶剂提取物对立枯丝核菌、灰葡萄孢菌、齐整小核菌、终极腐霉、尖镰孢菌黄瓜转化型的孢子萌发均表现出一定的抑制作用.其中,襄麦冬乙酸乙酯提取物较蒸馏水和甲醇提取物对病原真菌的生长和孢子萌发的抑制效果明显.乙酸乙酯提取物相对于蒸馏水、甲醇提取物有较好的抑菌效果.襄麦冬提取物对灰葡萄孢菌、终极腐霉、立枯丝核菌的菌丝生长和立枯丝核菌、灰葡萄孢菌、齐整小核菌、终极腐霉、尖镰孢菌黄瓜转化型的孢子萌发有良好的抑制作用. 相似文献
19.
目的：探讨大理地区单刺仙人掌乙醇提取物和超声波提取物的体外抑菌效果及其抑菌机制。方法：以乙醇提取法和超声波提取法提取仙人掌原液,用K-B法分别测仙人掌提取物对标准株金黄色葡萄球菌、大肠埃希菌和白色念珠菌标准株的抑菌效果,以常量稀释法检测其最低抑菌浓度,并以抑菌曲线初步探讨其抑菌机制。结果：两种方法提取的仙人掌原液对实验菌株均有抑制作用,乙醇提取物的最低抑菌浓度小于超声波提取物。抑菌曲线表明,乙醇提取物原液在金黄色葡萄球菌生长的9 h内均表现出抑制作用。结论：大理地区的单刺仙人掌两种提取物对本实验的革兰阳性菌和革兰阴性菌及真菌均有抑制作用,其中乙醇提取物的抑菌效果较超声波提取物好。本研究可为仙人掌提取物的进一步研究和应用打下理论基础。 相似文献
20.
钱和 《浙江大学学报(A卷英文版)》2004,5(6)
Dried ground leaves of Psidium guajava L. (guava) were extracted by water and aqueous ethyl alcohol 50% (1:10) ratio, and the total phenolic content in the extracts was determined spectrophotometrically according to Folin- Ciocalteu's phenol method and calculated as gallic acid equivalent (GAE). Remarkably high total phenolic content 575.3 (15.5 and 511.6(6.2 mg of GAE/g of dried weight material (for ethanol guava leaf extracts and water guava leaf extracts, respectively) were obtained. The antioxidant activity of lyophilized extracts was determined at ambient temperature by means of a 2,2-diphenyl-1-picrylhydryzyl (DPPH˙) colorimetry with detection scheme at 515 nm. The activity was evaluated by the decrease in absorbance as the result of DPPH˙ color change from purple to yellow. The higher the sample concentration used, the stronger was the free radical-scavenging effect. The results obtained showed that ascorbic acid was a substantially more powerful antioxidant than the extracts from guava leaf. On the other hand, the commercial guava leaf extracts and ethanol guava leaf extracts showed almost the same antioxidant power whereas water guava leaf extracts showed lower antioxidant activity. The parameter EC50 and the time needed to reach the steady state to EC50 concentration (TEC90) affected the antiradical capacity of the sample. The antioxidant efficiency (AE) has been shown to be a more adequate parameter for selecting antioxidants than the widely used EC50. This study revealed that guava leaf extracts comprise effective potential source of natural antioxidants. 相似文献