Rosalind Franklin (July 25, 1920 - Apr. 16, 1958) was an English scientist who contributed to the discovery of the molecular structure of deoxyribonucleic acid (DNA), a constituent of chromosomes that serves to encode genetic information.
Beginning in 1951, she made careful X-ray diffraction photographs of DNA, leading her to suspect the helical form of the molecule, at least under the conditions she had used.
Minggu, 25 Juli 2010
Kamis, 22 Juli 2010
Born This Day: Gregor Mendel
From Today In Science History:
Mendel (July 22, 1822 – Jan. 6, 1884) was an Austrian pioneer in the study of heredity. He spent his adult life with the Augustinian monastery in Brunn, where as a geneticist,
botanist and plant experimenter, he was the first to lay the mathematical foundation of the science of genetics, in what came to be called Mendelism.
Over the period 1856-63, Mendel grew and analyzed over 28,000 pea plants. He carefully studied for each their plant height, pod shape, pod color, flower position, seed color, seed shape and flower color. He made two very important generalizations from his pea experiments, known today as the Laws of Heredity. Mendel coined the present day terms in genetics: recessiveness and dominance.
Mendel (July 22, 1822 – Jan. 6, 1884) was an Austrian pioneer in the study of heredity. He spent his adult life with the Augustinian monastery in Brunn, where as a geneticist,
botanist and plant experimenter, he was the first to lay the mathematical foundation of the science of genetics, in what came to be called Mendelism.
Over the period 1856-63, Mendel grew and analyzed over 28,000 pea plants. He carefully studied for each their plant height, pod shape, pod color, flower position, seed color, seed shape and flower color. He made two very important generalizations from his pea experiments, known today as the Laws of Heredity. Mendel coined the present day terms in genetics: recessiveness and dominance.
Jumat, 02 Juli 2010
Southern Alberta Dinosaur Project 2010 Photos
I'm back in the field with David Evans from the ROM, hence the lack of posts for the past few weeks. Here are few recent photos:
Reopening a theropod quarry
Collecting a hadrosaur femur from the Milk River Ridge
Students mapping in the ceratopsid bone bed.
Nic Campione hard at work.
Prepping on a rainy day.
Reopening a theropod quarry
Collecting a hadrosaur femur from the Milk River Ridge
Students mapping in the ceratopsid bone bed.
Nic Campione hard at work.
Prepping on a rainy day.
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