Many scientists believe that comets contain complex carbon-based molecules and that comets crashing into the early Earth could have provided the building blocks for life.
Free radicals of oxygen, formed briefly in most natural chemical reactions with oxygen, set up chain reactions in the body as they interact with other molecules, and that process can damage cells and even the genetic material they contain.
(See physiology.) A biochemical or molecular biological definition sees living organisms as systems that contain reproducible hereditary information coded in nucleic acid molecules and that metabolize by controlling the rate of chemical reactions using the proteinaceous catalysts known as enzymes.
The results of competitive adsorption showed that HGG molecules could displace BSA molecules and that HGG was the dominantly adsorbed molecule on the DLC film surface in a mixture of BSA, HGG, and HA.
Compounds that do not form discrete molecules and that are regarded as ionic by our procedure and as molecular by OPSIN (for example, SnO(_{2}) as [Sn](=O)=O).
We show that their encapsulation may be performed using methods typically used for hydrophobic molecules and that absolute lipophilicity is not necessarily a prerequisite for encapsulation into a hydrophobic carrier such as polystyrene.
He speculated that a flash of bright light could be used to create a population of excited ammonia molecules and that confining them in an appropriate cavity would limit the wavelengths that they could then emit.
Our results indicate that recognition of 3' splice sites involves different U2AF-like molecules, and that modulation of these general splicing factors can have profound effects on splicing.
For chloramphenicol, erythromycin and nalidixic acid whose resistance was also due to efflux, adding CLX to EPI did not increase their activity suggesting differences between the efflux process of these molecules and that of β-lactams.
This notwithstanding, we are able to show here that, if PfCRT is a carrier, it can only transport protonated or di-protonated chloroquine molecules and that choloroquine can either bind heme or heme related species in the digestive vacuole regardless of its charge or in its neutral form.
