Introduction to Chemistry

· IntroBooks · 朗讀者:Tracy Tupman
3.0
6則評論
有聲書
51 分鐘
完整版
符合資格
評分和評論未經驗證  瞭解詳情
想要試閱 7 分鐘 嗎?無論是否有網路連線,都能隨時聆聽。 
新增

關於本有聲書

Chemistry studies the nature (atomic and molecular structure, etc.), properties, composition and transformations of matter. Here are some benefits that chemistry can provide:

♦ fabrics of the clothes we use in day-to-day are materials obtained through the development of Chemistry;

  • the artificial fibers (nylon, tergal, etc.), synthetic rubbers, plastics, part of a group of materials called polymers; polymers have been numerous applications: plastic bags, towels, bottles, plastic pipes, electrical coatings, toys, records, upholstery, pan coatings;

Biochemistry has allowed not only to know precise mechanisms of the body, such as influence them, enabling the development of molecular biology and pharmacology, fundamental to the progress of medicine. And in the area of ​​Food Engineering, for example, is that chemistry plays a significant role? Yes. It is vital!

For example, the food industry uses the so-called "additives": substances are capable of providing the following foods: - antioxidant (inhibits the oxidation process); - Preservatives (increase durability); - Stabilizers (helps keep emulsions and suspensions); - Sweeteners (transmits sweet taste to products), etc. Most countries have four types of artificial sweeteners found in the consumer market: - saccharin (Pan American) - the CYCLAMATE (Brasfanta) - the ACESULFAME-K (Hoechst) - aspartame (Monsanto). Obtaining these sweeteners requires well-established synthetic routes developed in research in the field of chemistry. To understand the metabolism of sweeteners in humans and investigate the toxicity mechanisms have been proposed that involve a series of chemical reactions (w / details, see ref. *). As can be seen, chemistry has provided numerous benefits to humanity. On the other hand, we can not forget that many chemical processes are responsible for the degradation of the environment in which we live.

評分和評論

3.0
6則評論

為這本有聲書評分

歡迎提供意見。

聆聽資訊

智慧型手機與平板電腦
只要安裝 Google Play 圖書應用程式 Android 版iPad/iPhone 版,不僅應用程式內容會自動與你的帳戶保持同步,還能讓你隨時隨地上網或離線閱讀。
筆記型電腦和電腦
您可以使用電腦的網頁瀏覽器閱讀從 Google Play 購買的書籍。