"探究酵母菌细胞呼吸的方式"实验研究及改进

"探究酵母菌细胞呼吸的方式"是人教版普通高中课程标准实验教科书必修1"分子与细胞"第五章第3节中的1个探究实验,要求设计和进行对比实验,并比较酵母菌在有氧、无氧条件下,酵母菌细胞呼吸产物种类和含量的差异.     

用输液器改进"探究酵母菌细胞呼吸的方式"实验

本文用输液器作为实验主体装置来探究酵母菌细胞呼吸的方式,使实验简单易行,能在一节课内完成,提高本实验的开出率.     

"细胞呼吸"的推导式教学

在人教版高中《生物》“细胞呼吸”这一内容中，由三个知识块构成，即：有氧呼吸、无氧呼吸、细胞呼吸的意义。     

"ATP的主要来源——细胞呼吸(一)"教学设计

一、教材分析新课程标准中,与本节有关的表述是:"说明细胞呼吸,探讨其原理的应用",并在相应的活动建议中,列入了"探究酵母菌的呼吸方式"。"探究酵母菌的呼吸方式"是本节第一课的内容。教材对提出问题和设计实验这两个步骤提供了参考案例和参考资料,大大降低了探究实验的难度。教材通过这个探究实验,还介绍了什么是对比实验。     

"运动与呼吸"一节教学内容的灵魂

人教版《生物学》八年级上册有一章内容为“各种环境中的动物”。该章内容在呈现形式上是根据动物的生活环境不同。将动物分为三类，并分别选取代表动物进行研究。这种编排方式遵循了动物的进化规律。实际上在每一节里面，教材所选取的主要内容则是动物的“运动”与“呼吸”，当然在教学中，师生们真正要研究的也是动物的“运动”与“呼吸”，教学目标的达成也因此围绕动物的“运动”与“呼吸”展开。动物的“运动”与“呼吸”是贯穿整章内容的“教学暗线”，本章教学内容的灵魂所在。     

"探究酵母菌细胞呼吸方式"实验的改进

“探究酵母菌细胞呼吸的方式”是人教版高中生物学实验教材《分子与细胞》第五章第三节上的一个实验。我们按课本要求进行了反复试验后，对其中的一些步骤作了改进，提高了实验的科学性和可行性。     

呼吸技巧在小号演奏中的运用分析

本文通过对小号演奏过程中几种呼吸方式的阐述,分析了在小号演奏中呼吸技巧练习的方式,包括选出合适的呼吸训练方式、培养正确的演奏姿势等,探讨了在小号演奏之中呼吸技巧的运用方式,以期为广大读者提供参考。     

"鳃-适于水中呼吸的器官"一节教学

本节是七年级《生物》第四章第二节动物的呼吸中前半部分的内容 ,主要讲适于水中呼吸的器官———鳃 ,《生物》这本教材是将原有的动、植物知识以生物的生命活动现象为主线进行编写的 ,前一节已经研究了植物的呼吸 ,本节课通过对适于水中呼吸的器官———鳃的研究 ,可以使学生对生物的呼吸这种生命活动的现象有更进一步的认识 ,使学生懂得生物的呼吸有共性 ,但动、植物在各自的生命活动中也有个性 ,同时也为下节讲肺———适于陆上呼吸的器官打下基础。1　教学理念选择行之有效的教学方法是取得良好的教学效果的保证。生物是一门以观察生命…     

"直观化"的歌唱呼吸与发声训练手段

呼吸、音源是歌唱发声中最基本的两个要素,着重论述了两者的本质特点、相互关系及其内部规律,从而总结出了一套行之有效的"直观化"歌唱呼吸与发声训练方法.     

运用科学史对"呼吸作用"一节课的教学

人教版高中《生物》“呼吸作用”一节是关于细胞代谢的重要内容．这部分既是教学重点．也是难点。由于难度较大，教师一般采用讲解的方法。但是，许多学生对这一部分的学习兴趣不大。这里笔者采取了与科学史相结合的方式获得了良好的教学效果。其步骤是：首先以研究呼吸作用的科学故事为“锚”．提供给学生阅读。在这个阅读材料中，根据人类对呼吸作用的认识过程，先介绍无氧呼吸的研究，后介绍有氧呼吸的研究(这种叙述与教科书正好相反)。     

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?     

Western and Eastern culture differences in commercial field

The communication of people partially is the communication of cultures. Culture has a direct effect on international commercial activities in all aspects. Different conceptions about time, space, equality, law and the like, lead people to deal with things in different ways. So to know cultures of the counterpart is to facil-itate our enterprises so as to have a smooth and successful communication in commercial activity.     

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…     

风的曲线

Rosco and I wait for the fishermen to return.I sit at a wooden bench near the store at Mt.Baker Resort and watch the clouds change shape. Rosco has my belt around his neck and an eight foot tow chain hooked to a tree. Dogs must be on a leash. Ducks and rabbits are loose.