Self-evaluation is a comprehensive and systematic summary of personal situation over a period of time. Self-evaluation allows us to find mistakes and correct them in time, so we should prepare a self-evaluation well. How to write self-evaluation so as not to become a mere formality? The following is my self-identification of applied chemistry, which I carefully arranged, hoping to help everyone.
Self-appraisal of applied chemistry 1 I am a student of Grade 05 in the Department of Applied Chemistry of xxx Vocational and Technical College of Chemical Industry, majoring in chemical pharmacy.
I usually like reading and writing, and the summer vacation practice experience written by xxxx in the first half of the year was rated as "excellent practice experience" by the department. In the first half of 20xx, he was rated as a "civilized student".
I like sports at ordinary times and actively participate in various cultural and sports activities organized by the college:
Participated in the 200-meter dash of the department sports meeting and won the third place; College sports meeting 4*400 relay race, fifth place; "Dormitory Culture Festival" organized by the Youth League Committee. Write some radio articles and contribute actively.
In order to enrich and enrich my extracurricular life, I joined the "Young Volunteers" organization in the second half of xxxx. And actively participated in various activities organized, and participated in the March activities of "Qingshi Square-Zhuzhou Second Bridge" to learn from Lei Feng.
In the second half of xxxx, I was lucky enough to join the Department of Accommodation Management and become a member of it. And in the first half of 20xx, he was rated as an "excellent officer".
From the second half of xxxx to the first half of xxxx, I joined the work-study program.
I like computers at ordinary times, and participated in the "Computer Intermediate Application Operation" competition organized by the Department of Automation, and won the "First Prize".
In addition to specialized courses, I also attended social etiquette taught by xxxx and mechanical design innovation taught by xxxx. In sports, I chose aerobics and bodybuilding! And passed all the exams.
Self-identification of applied chemistry 2. Applied chemistry is a major that combines theory with industry and is closely combined with production practice. When we are about to enter the society, we should not only master the theoretical knowledge related to chemistry, but also integrate theory with practice and contact with the actual industrial production process, so as to lay a solid foundation for future graduation and work. So that they can smoothly integrate into modern society, cultivate themselves into practical talents needed by modern society, and enter enterprises for in-depth study and innovation before graduation. To cultivate themselves into professional and practical talents of society, companies and enterprises, we must enter relevant enterprises or companies to study, apply our theoretical knowledge to practical production with textbook knowledge, and make our own contributions to the development of enterprises and society.
First, the internship content and completion summary
I worked as an intern in Zhejiang Xianfeng Technology Co., Ltd., and the internship content was mainly to visit the production workshop and laboratory of the internship unit, master the use of its experimental equipment, and understand the company's products under the guidance of the internship instructor, including its raw materials, production principles and industrial production processes. Assist in the production of cytosine, 5- methyluridine, β-thymidine, adenine, cytidine and other products. The purity of the synthesized product was analyzed by high performance liquid chromatography, and the product was analyzed by infrared spectrum and thermogravimetric analysis, and compared with the expected results. A few days before the internship, I may have just stepped out of the campus and entered the society, and my mentality and working status have not been adjusted well. At first, several experiments failed, but after careful guidance and education by the tutor and several attempts by myself, the task assigned by the tutor was finally successfully completed. The purity of our synthesized products is over 99.5% by HPLC detection, which all meet the product requirements. The infrared spectrum is not much different from the expected one, and the result is satisfactory.
1. Overview of production practice enterprises
Zhejiang Xianfeng Technology Co., Ltd. is a company mainly engaged in the production of pharmaceutical raw materials and intermediates, located in the national historical and cultural city of Linhai. The company has more than 300 employees, including more than 60 technicians, 9 doctors, masters and senior engineers and more than 20 engineers. The company adheres to the business philosophy of market-oriented, innovation and development, quality and survival, strengthens enterprise management, and has a professional and technical team with high quality, strong pioneering ability and rich production experience. The company has strong technical force, modern technical center and testing center, 10 patents, advanced production technology, excellent equipment and perfect testing means. The company constantly develops new products to meet the needs of domestic and foreign markets. Products sell well in domestic and foreign markets and are well received by customers. In the spirit of "quality first, innovation leading" and the principle of "mutual benefit and common development", the company wholeheartedly provides quality products and services to customers at home and abroad.
At present, the company's products are mainly intermediates of anti-infective drugs, such as nucleoside and nucleotide products, which are at the leading level in China in terms of production scale, market share, quality and cost control. Pioneer Technology Company has become the largest producer of nucleoside and nucleotide products in China. The comprehensive market share of the company's core products, 5- methyluridine, thymidine, cytidine, cytidine acid, cytosine and adenine, exceeds 50%. The company's old product sodium methoxide also accounts for more than 50% of the domestic market. The company is developing intermediates of sartan drugs and anti-tumor drugs, and is also developing raw materials including imatinib and losartan potassium.
2. Product production and subsequent testing and analysis
Cytosine is the first product we produced. Its structural formula is C4H5N3O, which is white or white-like crystalline powder. It is mainly used to synthesize anti-AIDS drugs and anti-hepatitis B drugs, such as lamivudine, anticancer drugs such as gemcitabine, enotabine and 5- fluorocytosine. In the past, I only studied cytosine in biology. Cytosine is one of pyrimidine bases in nucleic acid and exists in DNA and RNA. This is the first time I have been exposed to cytosine in actual production. First of all, I understand the whole process of cytosine production, from purchasing and warehousing, to picking production, and finally to canning finished products. I have a basic understanding of the production activities of the whole workshop, which will lay a good foundation for us to be familiar with enterprises and carry out practical operations.
5- methyluridine is a white or white-like crystalline powder, and it is an important intermediate of a series of gene therapy drugs for AIDS, such as zidovudine (AZT), stavudine (D4T) and fluorouracil (5- deoxyfluorouracil).
D- ribose and thymine are used as raw materials, heteropoly acid is used as catalyst, and they are added into a condensation kettle according to a certain proportion, and a proper amount of condensation reaction solvent is added, and the temperature is raised to 36 ~ 80℃ by stirring, and the temperature is kept for 4 ~ 12 hours, and then cooled to room temperature. The crude heteropoly acid was obtained by filtration (recycling), and the filtrate was distilled under reduced pressure until no liquid was produced. Adding solvent, stirring and dissolving, cooling to 0-5 DEG C, centrifuging and drying to obtain the finished product.
Under the introduction of the tutor, I helped the regular staff to synthesize the product and then tested it by HPLC. The purity reaches 99.665438 0%, which meets the product requirements.
In addition, my tutor introduced me to the production technology of several other products, including β-thymidine, adenine and cytidine, and showed me around their respective production workshops. I assist regular employees to produce these products, and carry out purity testing and spectral analysis respectively.
Second, the main harvest
The first is the transition from going out of campus to formal work. Although the internship didn't officially start work, direct contact with the company's workshop and production equipment made me feel the great difference between industry and laboratory more deeply. In the school classroom, although the teacher emphasized industrial production and laboratory experiments, we didn't have a deep feeling at that time. Now, really walking in the workshop of the factory, facing large instruments and large equipment, I really feel small. I have to face the reality. I really want to graduate and enter the society. This more than a month is a transitional period. In addition, it is very important to pay attention to the safety of industrial production.
Because chemical production is uninterrupted, there must always be someone in the workshop. Although I am not a regular employee, we all strictly abide by the production discipline in the workshop, and actively ask questions when we encounter uncertainties to avoid safety accidents. We must first understand the production process in the workshop. Let's look at each instrument and equipment first to understand their names and uses. The technicians will patiently explain to us what we don't understand. In order to work better, we draw a flow chart to get familiar with the working environment. Of course, safety is the most important thing in chemical production. So the director gave us a safety education lesson when we first entered the workshop.
Another is the consolidation and improvement of knowledge. Through my internship in analytical chemistry laboratory, I really realized that there are many differences even in laboratories, factories and schools. The laboratory knowledge in the school is simply set for our study, while the internship in the unit is to make the products get better economic benefits for the workshop.
Production provides preparation and guarantee. Through this internship, I have a more intuitive and emotional understanding of industrial production equipment and instruments, which makes me have a deeper understanding of the theoretical knowledge I learned in the campus classroom. Under the guidance of the instructor, I realized that in production practice, it is not enough to rely only on the theoretical knowledge learned in the school classroom. When we arrive at the factory, we have a lot to learn from scratch. I will continue to learn from my predecessors in the factory and strengthen communication with them. Treating employees in the company, no matter what position, is a senior to me. I should respect them and correctly handle the interpersonal relationship in the company, which will be of great help to my future work. The people I met during my internship and the things I learned are all precious wealth, which is my reserve before I officially entered the society. The internship experience has enriched my experience and filled me with confidence and hope for future challenges. No matter what industry I am engaged in in in the future, I will strengthen my belief, and after I set my goal, I will unswervingly go on. The road ahead is full of thorns and bumps, but it also hides opportunities. I want to seize the opportunity and challenge the future. Paying may not necessarily lead to gains, but continuing to pay will definitely lead to gains.
Third, self-identity.
I successfully completed this internship. I successfully completed every task assigned to me by my tutor. Although there were some episodes in the middle, they all solved the problem in time. Through this internship, I learned a lot of knowledge beyond books, and appeared like a sponge, constantly charging myself, absorbing knowledge and experience, making my color knowledge more systematic and perfect.
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