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Development of leather dyes

4名威客为此工作的平均竞标价是$63

Wernyhora

Dear Sir or Madam, I have PhD in organic chemistry. I was running R&D lab in household chemistry and cosmetics for over a year. Later I was working as team leader in medicinal chemistry lab. Currently I work as f 更多

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GirgesNabil

Hello Sir,  I'm professional freelance writer avialble to assist you Sir 24/7. I am a student of BioChemistry and Chemistry ( Faculty of science ), hard worker, responsible and conscientious writer who is ready to help 更多

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HanyasSalem

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