too, including muscle cells with nuclei still in each. Cell nuclei contain DNA, nature's architectural code for building the organism.Last year two discoveries made the headlines. George Poinar, his son Hendrik, and molecular biologist Raul J. Cano of California Polytechnic State University in San Luis Obispo, extracted DNA from the cells of an extinct stingless bee called Proplebeia ...
learn languages, even to help deaf children learn sign language.Research improves with VR. Engineers planning a new building can construct it in virtual reality, walk around and through it — before a hole is dug in the ground! Other scientists can, according to the University of North Carolina's Department of Computer Science, 'walk around' a chemical compound, add an atom or molecule to ...
Donald Edmonds and Fritz Vollrath examined spider silk with nuclear magnetic resonance. The silk used in web building is strong and rigid That used for capture threads is more stretchable, its elasticity apparently from "molecular springs" that connect more rigid parts of the silk.Spider silk can't be woven into cloth, like that produced by the silkworm, but humans do find a good use for it as ...
as if the human had suddenly acquired marvelous night vision. Right now Carnegie Mellon's Field Robotics Center is building a robot that can go out onto the space shuttles, inspect the tiles and perform maintenance. Closer to home is the woolshearing robot project at the University of Western Australia. Sheep can now be sheered in 17minutes, which is presumably better for the sheep as well ...
methods of organic analysis were too crude to decipher the structure of proteins, but it was possible to analyze their building blocks of amino acids, which have a basic pattern of hydrogen and nitrogen atoms, a group of carbon, hydrogen and oxygen atoms, and a branch group of atoms that identifies a particular amino acid.After another Swedish chemist, Theodor Svedberg, invented the ...
t (I hope), but scientists believe that they are the ancestors of an impressively social insect-the termite, adept at building edifices of their own, or tearing ours down.Cockroaches remind me of little machines, but they learn faster than our machines do. Sensitive to vibration of air and surfaces, they avoid us, and even learn to avoid places where we've usually put poison. An individual ...
its air seeming less polluted, richer in oxygen. Olmstead planted trees around the park's perimeter to screen out the buildings beyond. In some areas of the park, notably the hilly and forested "Ramble," it's hard to believe you are in a huge city until you hear the distant hum of traffic. It sounds like a steel and concrete animal curled around the park, breathing heavily.(c)1992, Los ...
my best to give you a brief introduction and a few examples of current work.To begin with, genes are not simple little building blocks of heredity. When the Austrian monk Mendel was carrying out his great experiments in the 1860s, he had no idea that chromosome bodies in the cell nucleus were responsible for his interesting results in cross breeding pea plants. He kept careful records and ...
가운데 상당수가 각종 호흡기질환 알레르기성질환을 포함하는 이른바 빌딩증후군(sick building syndrome)으로 고통받고 있다. 그 원인은 실내공기의 오염에 따른 것으로 나타났다.최근 의료기술의 발달로 병원의 시설이 대형화되고 있으나 병원내 환경오염으로 인한 병원감염(hospital acquired infection)에 ...
and the Soviet Union has been carried through in so specialized and speculative a fieldNASA has been designing and building SETI equipment since the early 1970s but this is going to be the largest of all searches-a $100 million, 10-year program. In a very first day of operation it is expected to dwarf all the searches carried out in the previous 32 years.The Great Search will be divided into ...