Read More
Date: 3-11-2019
1183
Date: 7-9-2019
672
Date: 10-7-2018
1875
|
Alkenes
An alkene, sometimes called an olefin, is a hydrocarbon that contains a carbon–carbon double bond. Alkenes occur abundantly in nature. Ethylene, for instance, is a plant hormone that induces ripening in fruit, and α-pinene is the major component of turpentine. Life itself would be impossible without such alkenes as β-carotene, a compound that contains 11 double bonds. An orange pigment responsible for the color of carrots, β-carotene is an important dietary source of vitamin A and is thought to offer some protection against certain types of cancer.
|
|
"عادة ليلية" قد تكون المفتاح للوقاية من الخرف
|
|
|
|
|
ممتص الصدمات: طريقة عمله وأهميته وأبرز علامات تلفه
|
|
|
|
|
المجمع العلمي للقرآن الكريم يقيم جلسة حوارية لطلبة جامعة الكوفة
|
|
|