Experience of 219 Biological Experiment

Biology is a natural science based on experiments, and the development of modern biological science especially depends on scientific experiments. The following is the "Experience of 219 Biological Experiment" brought by me for your reference only. Welcome to read it. Experience of 219 biological experiment 1

I am personally interested in the experiment. Through the study of the course, it is not only to learn some knowledge and experimental operation, but more importantly, I think it is to understand the experiment and cultivate the basic experimental quality. For example, we attach importance to experimental preparation, study experimental data, be serious about experimental operation, be patient with experimental process, and so on. Secondly, through this course, I learned a lot of basic experimental skills and methods, such as instrument debugging and calibration, experimental safety criteria, error analysis and so on. Thirdly, most of the experiments are done in the form of groups, which on the one hand cultivates the students' sense of cooperation, on the other hand enhances the understanding and feelings among the students.

In addition, physiological experiments can cultivate my experimental accomplishment and patience. I think the experiment tests the practical ability, but it also tests the psychological quality. It is very important for students to experiment and record the standard curve by themselves. This kind of patient and meticulous experimental quality is especially needed for students like us who are based on experimental courses. I think the important reason why the school arranges these experimental courses is to cultivate this patience and rigor.

Finally, I would like to make some comments and suggestions on the uncomfortable points that my classmates and I encountered in the experiment:

First, many instruments and equipment in the laboratory are seriously aging, so I hope that on the one hand, the damaged instruments can be repaired and replaced in time, and the laboratory also has some spare instruments; On the other hand, the content of testing and debugging of some instruments can be appropriately increased to reduce the phenomenon that the experimental effect is seriously affected by instrument problems.

Secondly, it is suggested that we should be taught to use Origin and other software from the very beginning, especially when drawing standard curves by hand, which not only takes a lot of time, but also has a big error.

Thirdly, it is suggested to add more interesting experiments, which can not only stimulate the interest of bachelor students in experimental classes, but also obtain better experimental results. Experience of 219 biological experiment II

Biology is a natural science based on experiments, and the development of modern biological science especially depends on scientific experiments. In biology teaching, practical links such as experiment, study and observation play a vital role in mastering biological knowledge, scientific methods, cultivating our practical ability and forming scientific quality. It is for this reason that since we started to contact the subject of biology, there have been biological experiment courses to exercise our various abilities.

However, it is true that I have attended all kinds of biological experiment classes, and I feel more deeply how much the comprehensive experiment of modern biotechnology has influenced me.

First of all, I must mention the experimental requirements put forward by Teacher xx and Teacher Jin.

I was shocked by the unique experimental arrangement, because since junior high school and even the first two years of college, no teacher has ever mentioned that we should come to the laboratory to do experiments outside the experimental class arranged by the school. Of course, this is probably closely related to the content arrangement of our biotechnology experiments. For a long time, we have obeyed the rules set by the curriculum accurately, but Mr. Jin played it down, and dancing with his hands broke the "cage" that hung over us for many years. Sometimes, I even wonder, with the breaking of this thinking limitation, will it also inspire our wings called imagination, so that we can soar in the world of knowledge?

Ok, I can't go too far, but I still need to get back to the theme of my experience-experiment! In the first class, the teacher explained to us in detail a series of experiments that we need to complete this semester. All of them are interlocking, closely embedded, and a little bit of pressure, but we are more excited with a kind of eagerness, and we can't wait to start work at once, relying on the knowledge we have learned, and finish the experiment seriously, and we can still see the gratifying result in the end. So delusional, our long journey of modern biotechnology comprehensive experiment from the second week.

Because the teacher doesn't have a rigid requirement for the experimental time, we just drill into the laboratory whenever we have free time, which is less than what happened in previous experimental classes. Because of the lack of some experimental instruments, every time students do experiments, they are pushed and shouted by you, resulting in the loss of experimental interest. As a result, the attitude of doing experiments is becoming more and more lax, or even simply going off the stage. After several experimental classes, there is no enthusiasm. However, according to Mr. Jin's proposal, everyone came to the experiment at different times, which made the time of using the instrument stagger, reduced the noisy scene of competing for instruments or drugs, and the experiment became much smoother.

Mr. Jin will be considerate of some students who are busy first, write down on the blackboard the steps and precautions they will probably do in the experiment, the items and requirements for the next experiment, and then start hanging around among the students who are busy with the experiment. Observe our experimental operation, or explain the reason of our experimental steps from time to time; The role of experimental drugs; How to get better results; The reason why the experiment didn't get a good result or failed. However, with the development of the experiment, more often, after reading the experimental steps required in the book, we pestered Mr. Jin and surrounded him to ask him various questions about the experiment. Even if the same question was asked many times, Mr. Jin still answered our questions with a kind smile. His approachable, careful teaching, his arrogance and impatience deeply touched every student in the experiment.

In fact, this is the highlight of his teaching method. Independent experiments force us to carefully taste the steps. All kinds of problems in the experiment require us to think about how to eliminate them and continue the experiment; The unsatisfactory experimental results force us to carefully review any details of the experiment and find out the problems, and also require us to deeply understand the mechanism of this experiment, the reasons for using drugs, the requirements for experimental operation and so on. These experiences that I have gradually accumulated through my own hands and brains have never been obtained before. At that time, I only knew how to follow the steps written by teachers and books, and I didn't care why I did it, so I didn't explore the experiment, and what I could learn naturally decreased.

After talking about my views on Mr. Jin and the teacher's education mode, I would like to talk about what I have gained under such teaching guidance. I am a very lazy person. In the past, most of my experiments were scripted, and I seldom used my brain to think about the cause and effect of the experiment, and my explanations to the teachers on stage were mixed with a little knowledge. However, this experiment really took me a long time to understand the principle, the mechanism of experimental operation and the use of instruments, which helped me correct and master many operations. At the same time, it also made me realize that I was confused and irresponsible before, and I was so happy and satisfied to devote myself to one thing wholeheartedly, and I also got a lot of knowledge that I could never get in class. Now, let's talk about my several big gains in detail.

from small to large, there are some. First of all, after mixing in the laboratory for a long time, I have the function of "conjuring up" any utensils that everyone wants. As long as it is something that we are familiar with in the laboratory (not counting the things packed by the teacher), whether it is pharmaceutical reagents or measuring cylinder test tubes of different specifications, I can touch it out, saving the time and effort of looking for help from teachers everywhere. Second, I learned how to configure many reagents, so I knew the problems that should be paid attention to when configuring different reagents, consolidated the knowledge related to some drugs, and came to a conclusion when configuring for many times: if I am not familiar with the reagent formula, it is best to take a special notebook to record it for a rainy day, so that the future experiments will not be in a hurry because of the reagent problems. Third, the experimental steps need to be carefully considered. Every step has the intention of predecessors. After all, these experiments are the essence of the past scientists' research. Knowing their intentions and reasons, it will be more handy to start experiments and not easy to forget or make mistakes. Fourthly, this is my greatest experience, and it is not all from this experiment, and it can not only be used in doing experiments. This experience is: after deciding what to do, it is best to think clearly about what you will need to do in action, do a good job in preparation, pave the way for follow-up actions, and make a list according to its laws, which will make the experiment or any other things more smooth and orderly, and eliminate doing too much useless work.

The above are some experiences I got from the comprehensive experiment of modern biotechnology this semester. I hope that in the next semester, I can apply what I have learned here to other experiments and even to my study life, expand my knowledge, broaden my horizons, enrich my background and strengthen my ability. I dare not claim to be a first-class talent in the future biology field, but can only encourage myself to be a useful person who lives up to expectations. Experience of biological experiment in 219 III < P > Under the new curriculum reform, biological experiment teaching is more important. On the one hand, it can cultivate students' experimental inquiry ability, on the other hand, it can stimulate students' interest in learning biology through experimental teaching. Let students explore in experiments, develop in exploration and feel the charm of scientific exploration. Theory is the basis of experiment, and the basic types of biological experiments, the selection of experimental materials, the safety principles of experiments and other related knowledge are the basic knowledge that biological experiment teaching should have.

1. Types of biological experiments: observation experiment, demonstration experiment and simulation experiment

(1) observation experiment.

A. What is observation experiment? Observation refers to the use of five senses, mainly vision, and of course hearing, taste, touch and some tools to understand things and natural phenomena.

B. Inspiration from observation experiment:

First, we should make clear the purpose and task of observation, which is a problem to be solved before observation.

The second inspiration is to cultivate students' scientific observation methods. The improvement of observation ability depends on correct observation methods and procedures.

C. Method of observing the experiment:

The first method is to observe the whole first, and then observe the part. Teachers should guide students to learn to observe comprehensively and grasp all aspects of things and the whole process of development and change, so as to achieve the purpose of understanding things.

the second method is comparative observation. Comparative observation is to observe by using vertical and horizontal comparison, seeking differences in similarities or seeking common ground in differences. Comparative observation enables students to find unusual things from ordinary phenomena, differences from similar affairs and similarities and causality from differences.

the third method is repeated observation. In order to ensure the reliability of the observation results, it is necessary to observe more times, otherwise it will be difficult for us to distinguish whether this phenomenon is accidental or inevitable.

D. Purpose and significance of observation experiment:

1. Observation improves students' interest in learning.

2. It helps to form scientific concepts.

3. It is helpful to develop students' ability of scientific inquiry

(2) Demonstration experiment.

A. The role of demonstration experiment: Demonstration experiment can closely link with classroom teaching, and effectively cooperate with biology classroom teaching with its vivid teaching effect and flexible experimental methods, which can improve students' interest in learning and help students understand and master knowledge.

B. Characteristics of demonstration experiment:

1. Being able to closely follow the teaching theme is conducive to highlighting teaching key points and breaking through teaching difficulties.

2. The phenomenon is obvious, vivid and intuitive.

3. It is convenient for teachers to operate and demonstrate, and can cultivate students' habit of standardizing experiments, especially teachers can explain while operating, which can strengthen the standardization of experimental operations.

4. Experimental materials are easy to prepare, which saves time and improves the efficiency of classroom teaching.

C. Types and requirements of demonstration experiments:

1. Demonstration experiments to impart new knowledge.

2. Demonstration experiment to verify and consolidate knowledge.

3. Requirements of demonstration experiment for teachers: prepare lessons carefully before demonstration, and pay attention to the accuracy and standardization of experimental operation and the demonstration role of demonstration teaching during demonstration.

d, problems that should be paid attention to in the demonstration experiment: the demonstration experiment must have a clear purpose and can explain the problem, and the demonstration experiment must have obvious phenomena and high visibility.

(3) Simulation experiment. The function and characteristics of simulation experiment:

1. For various reasons, it is very difficult or impossible to directly apply it to the research object, that is, the prototype. In this case, the model can be used instead of the research object, and the model must have some similarity with the prototype, so that it is possible to extrapolate the research results of the model to the research object. Therefore, the first function and characteristic of the simulation experiment is that the model can visualize and visualize macro or micro, abstract or complex things.

2. The model strengthens and highlights the main structural features of a certain part of the organism.

Second, experimental materials

(1) Selection of experimental materials.

1. Choose alternative materials and make simple instruments.

2. Make overall plans for related experimental teaching.

(2) the principle of selecting experimental materials.

1. scientific. No matter how the teacher develops the design, the core must adhere to the scientific nature of the experiment, and we should pay attention to this point in material selection and design.

2. Easy to obtain and low cost.

3. The experimental phenomenon should be obvious. The measurement and observation of experimental phenomena is an important link to draw scientific conclusions, and whether experimental phenomena are easy to observe directly affects the scientific nature of experimental conclusions. 4. Adjust measures to local conditions and time. Because many experimental materials are suitable for different areas and life cycles, we should also adhere to local conditions and adapt to the times when selecting materials.

Third, experimental safety issues

1. Do not know the safety rules of the laboratory and rush to carry out the experiment, because as soon as students enter the biology laboratory, they are curious and excited after seeing many experimental instruments and reagents.

2. Violating the rules of experimental inquiry operation.

3. In case of potential safety hazard, it is easy to panic and slow to respond.

After this training, I have a better understanding of biological experiment teaching, and I have my own new ideas and feelings. At the same time, I feel that I will not be confused in the future biological experiment teaching. I hope that I can apply the ideas gained from this training to my teaching practice, and at the same time, I must adhere to the new curriculum reform, so that my professional level can be promoted step by step under the guidance of the new curriculum reform, and finally I will become a professional compound teacher. Experience of 219 Biological Experiment 4 < P > Biology is an experimental subject in essence, starting from the development of DNA double helix structure.