Antibiotics
Since the end of the twentieth century modern medicine has been making an extensive use of various antibiotics. It should be noted that antibiotics are powerful agents in combating infections. The problem of discovering new antibiotics can be most successfully solved at special research institutes which may have a small experimental plant producing preparations of new antibiotics.
Russia has several research institutes working in this field. Before new generation of antibiotics made its appearance Russian science had produced a series of new effective drugs, such as albomycin, etc. This practically non-toxic preparation has found wide application in the treatment of pneumonia in newborn and small children. It is also successfully used in obstetric and gynecological practice. Surgeons have to use it during the treatment of the septic processes caused by staphylococci which can resist other antibiotics. It has been established experimentally that the composition of its molecule includes iron and it has a peculiar mechanism of affecting the bacteria.
Mention must also be made of tetracyclines, such as chlortetracycline. It was introduced after chlorphenol had been discovered. Therefore chlortetracycline was considered the second broad – spectrum antibiotic developed for therapeutic purposes. It was isolated in 1948 from biomycin. Because of its yellow colour it was marked as auremycin. Another antibiotic of this series is tetracycline. It has been found that it possesses great advantages over its sister compounds. It may produce less toxic effect and penetrate the cerebrospinal fluid to a much greater extent. It has been stated that in ordinary use the tetracyclines can be given orally in doses of 250 mg.
I was very glad to hear from you again. I haven't written for ages because of my school activities.
In your letter you asked me to say a few words about my future profession. I would like to be an account. Why? I'll try to explain.
Nowadays the profession of an account is very important. Every office, every organization has got centralized accounting.
In every organization there is a specialist, who should be able to maintain the accounting, inventory, make accounting reports and settlements with suppliers and consumers, calculate profit or anticipate losses, calculated salaries of the stuff and so on. That is why we need qualified specialists, who are able to carry out necessary and very serious documentation, know the law and many other materials. Therefore, a person who works as an accountant must be a very clever, responsible and serious.
Nowadays many institutions and universities in all countries prepare specialists we call as accountants.
That's all for me today. I have to go to the swimming pool.
Best regards to your family.
Write soon.
2. I'm not drinking milk now.
3. I go for a walk after dinner.
4. I don't go to the theatre every Sunday
5. He isn't reading now.
6. He is playing now
7. Is he playing now?
8. My mother works at a factory.
9. My aunt doesn't work at a shop.
10. Do you work at an office?
11. My friend loves in St.Petersburg
12. Mu cousin doesn't live in Moscow
13. The children aren't sleeping now
14. The children play in the yard every day
15. They don't go to the stadium on Monday
16. She reads in the evening.
17. She doesn't read in the morning
18. She isn't reading now
19. Does your father work at this factory?
20. Are you playing chess now?
21. Look at the sky: the clouds are moving slowly, the sun is appearing from behind the clouds, it is getting warmer.
22. How is your brother?
-He isn't well yet, but his health is improving day after day.
23. Listen! Who is playing the piano in the next room?