Objective To express the nontoxic mutant CRM197 of diphtheria toxin and study its effect as a carrier protein.
One of the biotic polysaccharides-pullulan was selected from many nontoxic biotic materials in order to replace some toxic substances in the liquid used in correction pen.
However, the six valent chromium passivation process is very toxic and has serious environmental pollution. Therefore, it is imperative to research and develop nontoxic or low toxic blunt chemical technology.
Undeterred, Lowry, the chemical engineer, experimented with nontoxic ways to clean, while Ryan, the AD guy, focused on marketing.
The advantages to these engines include better control, less risk of explosion and the ability to use nontoxic oxidizers to get everything going.
Nonflammable, nontoxic, and noncorrosive, they have low boiling points, which makes them useful as refrigerants.
Researchers from Rice University and Baylor College of Medicine grew a system of and capillaries on a nontoxic plastic matrix. They were able to control where cells grew in their plastic gel.
Article 6 Food shall be nontoxic and harmless, conform to proper nutritive requirements and have appropriate sensory properties such as colour, fragrance and taste.
Synthesis of tributyl citrate (TBC), a nontoxic plasticizer, under the promotion of tertiary amine has been investigated.
Use nontoxic cleaning products and paints over a dropcloth, recycle used oil, and schedule regular maintenance to avoid fuel and lubricant leaks.
The invention discloses a nontoxic environment-friendly tinplate tank lid sealant and a preparation method thereof.
It contains the pest control essential oil abstracted from pure natural plants, safe and nontoxic.
