The theory goes that these weren't normal rocks but rather the equivalent of cosmic sponges, loaded with water that was released on impact. While astronomers have confirmed that some asteroids and comets hold water, some scientists think the theory doesn't.
Western blot using an antibody that recognizes proteins modified with lipoic acid. The western blot (sometimes called the protein immunoblot) is a widely used analytical technique used to detect specific proteins in a sample of tissue homogenate or extract.It uses gel electrophoresis to separate native proteins by 3-D structure or denatured proteins by the length of the polypeptide.he name western blot was given to the technique by W. Neal Burnette and is a play on the name Southern blot, a technique for DNA detection developed earlier by Edwin Southern.
Detecting a Gestational Sac on Ultrasound. The gestational sac is seen earlier than a fetus can be detected on an ultrasound. A gestational sac can be seen as early as the fifth week of pregnancy or three weeks after conception.If no gestational sac is seen, it could mean that the expectant mother ovulated late.ransvaginal Ultrasound. Transvaginal ultrasound can be used to detect a fetus or gestational sac up to a week before traditional ultrasound. A transvaginal ultrasound is performed by inserting a lubricated wand into the vagina and performing the ultrasound internally.