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Date: 7-2-2018
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Date: 1-1-2017
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Date: 12-1-2017
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Carbon nanotubes
Carbon nanotubes were discovered in 1991 and consist of elongated cages, best thought of as rolled graphite-like sheets, i.e. in contrast to the fullerenes, nanotubes consist of networks of fused 6-membered rings. Nanotubes are very flexible and have great potential in materials science. As a result, research in this area is a ‘hot topic’ but is beyond the scope of this book; the end-of-chapter reading list provides an entry into the area.
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اكتشاف الخرف مبكرا بعلامتين.. تظهران قبل 11 عاما
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العراق يفوز بمنصب نائب رئيس لجنة الشرق الأوسط لمنظمة الأمم المتحدة للسياحة
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قسم بين الحرمين يعلن عن جاهزيته لاستقبال زائري النصف من شعبان
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