Sentences with phrase «when synthetic molecules»

These notes have been used by traditional cultures for centuries prior to finding their way into the Western fragrance repertoire, and were used in commercial perfumes until recently when synthetic molecules were developed to replace them.

Not exact matches

Ulijn's gel is composed of two simple synthetic peptide derivatives: (1) a component that binds to copies of itself with high directional preference, resulting in the spontaneous formation of nanoscale fibers when the molecules are dissolved in water, and (2) a surfactant - like molecule that associates with the fiber surface and presents simple, cell - compatible chemical groups.

Recently Berkeley Lab scientists used this method to calculate the absorption spectrum and confirm what several experimental results have been hinting — that the element berkelium breaks form with its heavy element peers by taking on an extra positive charge when bound to a synthetic organic molecule.

Although designing and building test molecules entails «a lot of chemical creativity,» Mattmann says that the most interesting work comes «when we start doing the chemical biology» — introducing the synthetic molecules into the living systems.

«The golden age of synthetic organic chemistry occurred between 1973 and 1987, when chemists began to have the ability to synthesize incredibly complex molecules,» he said.

When the goal is to block the expression of genes with molecules of siRNA (small interfering RNA), the synthetic DNA can be designed with a section complementary to the RNA so that the RNA will loosely attach to it.

When the reduction is initiated by either heat or synthetic chemicals, 50 % of the molecules break to the left (which may be toxic or unhealthful at the very least) and 50 % to the right.