芝芪菌质对中华绒螯蟹肌苷酸含量的影响

以中华绒螯蟹（Eriocheir sinensis）为研究对象,探讨芝芪菌质对中华绒螯蟹肌肉和性腺中肌苷酸含量的影响.将中华绒螯蟹随机分成4组,每组2个平行.第1组为对照组,常规投喂;另3组为试验组,在基础饲料中按0.25%、0.5%、1%的添加剂量加入芝芪菌质,饲养90 d后,采用HPLC法测定其肌肉和性腺中肌苷酸的含量.试验表明,中华绒螯蟹在食用芝芪菌质后,试验1组、试验2组、试验3组雄性螃蟹肌肉中的肌苷酸含量相比对照组分别提高41.30%、11.59%和36.96%,差异显著（P〈0.05）;雌性螃蟹肉中的肌苷酸含量相比对照组分别提高21.92%、15.79%和10.53%,差异显著（P〈0.05）.但试验组的中华绒螯蟹性腺中的肌苷酸含量影响不大,显示芝芪菌质对芝芪菌质对中华绒螯蟹肌肉风味起到改善作用.     

硫酸-苯酚法测定槐甘菌质多糖的含量

目的：建立槐甘菌质多糖的含量测定方法。方法：硫酸-苯酚法测定槐甘菌质多糖的含量。结果：葡萄糖质量浓度在10.08～80.64mg.L-1时与吸光度有良好的线性关系,线性方程为Y=0.018X＋0.0397（r=0.9995）,加样回收率分别为99.86%（80%,n=3）,RSD 0.29%;103.11%（100%,n=3）,RSD 0.41%;103.10%（120%,n=3）,RSD 0.81%。结论：该方法简便、稳定性和重复性好、结果可靠,可用于测定槐甘菌质多糖含量。     

台湾绿竹笋叶中营养成分分析

目的:对台湾绿竹笋叶中几种营养成分进行含量测定.方法:根据文献常见的化学分析方法进行测定.结果:台湾绿竹笋叶中总氨基酸含量为0.35%,总脂肪酸含量为0.0114%,维生素C含量为0.14%,总蛋白质含量为5.6%.结论:台湾绿竹笋叶是一种开发竹子饮品的理想材料.     

北五味子中多糖含量的测定

目的:建立测定北五味子中多糖含量的方法.方法:采用比色法测定北五味子中多糖含量.结果:测得北五味子中多糖含量为6.57%,平均回收率为99.78%,RSD=1.54%.结论:该方法简便,精密度及重现性均较好.     

妇科柴芍颗粒中重金属砷、铅的含量测定

目的:建立妇科柴芍颗粒中重金属铅和砷含量测定的方法.方法:采用石墨炉原子吸收分光光度法测定妇科柴芍颗粒中重金属铅的含量,用原子荧光法测定妇科柴芍颗粒中砷的含量.结果:重金属铅的含量在0～50ng/ml范围内线性关系良好(r=0.9996),平均回收率为97.6%(n=3,RSD=1.9%),金属砷的含量在0～10ng/ml范围内线性关系良好(r=0.9994),平均回收率为105.3%(n=3,RSD=1.7%).结论:所建方法简便﹑快速,重现性好,专属性强,灵敏度高,适合测定妇科柴芍颗粒中铅和砷的含量.     

天然口蘑及人工培植口蘑中多糖含量的比较

目的:建立口蘑中多糖的测定方法.方法:经苯酚-硫酸显色,采用分光光度法测定含量,λmax=490nm.结果:多糖含量,天然杨树口蘑为14.08%,RSD=2.24%;天然黑口蘑为9.20%,RSD=2.13%;人工培植口蘑为10.90%,RSD=2.07%.结论:该方法操作简单,准确可靠.     

天然口蘑及人工培植口蘑中多糖含量的比较

目的:建立口蘑中多糖的测定方法.方法:经苯酚-硫酸显色,采用分光光度法测定含量,λmax=490nm.结果:多糖含量,天然杨树口蘑为14.08%,RSD=2.24%;天然黑口蘑为9.20%,RSD=2.13%;人工培植口蘑为10.90%,RSD=2.07%.结论:该方法操作简单,准确可靠.     

知母总黄酮含量的测定研究

目的:建立知母中总黄酮含量测定方法.方法:以70%乙醇提取知母总黄酮,采用紫外分光光度法对知母总黄酮进行测定.结果:芒果苷线性关系为y=0.2309x-0.0031(r=0.9993),加样回收率为99.32%,相对标准偏差1.40%.结论:本方法简便、快速、准确,适合测定知母总黄酮的含量,可以作为知母质量检验的一个定量方法.     

扶芳藤多酚的微波辅助提取和含量测定

目的:从扶芳藤提取多酚,并测定其含量.方法:运用微波技术提取扶芳藤多酚,用比色法测定多酚含量.结果:测得扶芳藤中多酚含量为3.15%,平均回收率为99.94%,RSD=2.08%(n=5).结论:首次运用微波技术从扶芳藤中提取多酚,同时测定方法简便、快速、灵敏,实验结果令人满意.     

坝上油菜蜂花粉中总黄酮的超声提取及含量测定

目的 :从油菜蜂花粉中提取总黄酮 ,并测定其含量。方法 :采用超声技术提取总黄酮 ,用比色法测定总黄酮含量。结果 :油菜蜂花粉中总黄酮含量为 (30 .5 0± 1.0 0 ) % ,平均回收率为 99.6 0 % ,RSD =2 .95 % (n =6 )。结论 :运用超声技术从油菜蜂花粉中提取总黄酮 ,可提高提取率 ,节省提取时间。     

卡思卡特城堡

It is worthy of noting that, whilst Crookston Castle witnessed the earlier and happier portion of Mary's variegated life,     

不同的吃喝玩乐

一、吃和喝吃苹果 eat an apple, 吃药 take medicine,吃糖 have some sweets,吃饭 have one's meals,吃馆子 dine out,吃惊 be surprised/     

漏洞百出的教育

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?     

只要努力,不要后悔

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.     

浅谈移民问题

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.     

Sister Carrie, an Adherent of Desires

Sister Carrie is one of the most controversial characters in American literature.Thought as a "fallen woman" firstly,she was defined as a "new woman" by some critics later. However, by digging into the motivaton behind the whole process of Carrie's "success", the relationship between Carrie and her creator (the author), the social conditions of then American, it can be found that Carrie has never been free-standing on her thought and she has never found her real-sdf even after becoming a famous actress. In a society dominated by mass consumerism Carrie is only an adherent of her own desires. She also is a representative of all those country girls flooded into cities, a symbol and a sacrifice of the urbanization of America in a time countryside was overcome by cities.     

Improvement of one-cycle controller by use of proportional integral differential controller

1.IntroductionOne-cyclecontrolmethod,whichwasproposedaboutonedecadeago[1],hasbecomeanattractivemethodinspecialfieldssuchaspowerfactorcorrection[2-6],switchingamplifiers[7,8],etc.Themainideaofthiscontrollerisbasedonintegrationofdiodevoltageinone-cycleandforcesittobeexactlyequaltothereferencevalue.Themainadvantageofthiscontrollerisitsrealtimeabilitytorejectthevariationofinputvoltage[1].Despitethisgreatability,ithasnogoodperformancesinrejectingofloaddisturbanceandfollowingreferencecommands.Espec…     

库克斯顿城堡

城堡, 是欧洲典型的建筑之一, 每个城堡都有一个美丽的传说或是一段历史。从本期开始, 我们将推出“城堡之旅”, 带各位读者去浏览、观赏欧洲各地的城堡, 开始一段文化与历史的旅途!     

The Reader Response Approach to Teaching of English Literature

During interview with English majors, it was found that a majority of students expressed disappointment with their experience of English literature classes. Students' dislike of learning English literature appears to be the major problem of teaching English literature in China. Reader response approach is a good way to solve this problem. In this paper, I explain the rationale behind the reader response approach, such as its origin, definition, features, assumptions, and strategies. Then I illustrate how reader response approach works as a teaching strategy by presenting several teaching models. At last I evaluate its usefuiness for teachers and present the advantages of reader response approach in Chinese context.