British research and development of "megapixel" DNA replication technology British scientists have developed a new digital polymerase chain reaction (PCR) equipment, the use of liquid surface tension to divide DNA (deoxyribonucleic acid) samples into more than 1 million identical small Fragment. This allows scientists to directly calculate the number of individual molecules in each small fragment. The new measurement platform greatly improves the sensitivity and accuracy of sample screening. PCR, which came out in 1983, is an indispensable molecular biology technology. Scientists use it to amplify or copy specific DNA fragments. It is a special DNA replication technology in vitro. This technique relies on heating and cooling cycles of the reaction, using a protein called DNA polymerase (which is also used by living cells to replicate DNA) to replicate DNA fragments. Scientists generally use PCR to clone DNA, analyze genes, and detect genetic diseases in chemical and biological experiments; forensics also favor this technology. However, the current commercial digital PCR technology can only obtain 36960 small fragments at most. Carl Hanson, an associate professor at the Center for Physics, Astronomy and High Throughput Biology at the University of British Columbia, who led the study, said: "The latest technology solves many major technical problems that limit the scale and accuracy of traditional digital PCR technology, creating hundreds Ten identical sub-reactions without defects also control the dehydration of these reactions in high and low temperature tests. "The research team also found that the new" megapixel "technology has also set new precision in detecting rare mutations. Benchmark. Moreover, it takes only 1 minute to split an array of 1 million small fragments. Scientists say that this significant advancement can significantly improve the measurement accuracy of many genetic diagnostic and screening methods, including early screening of cancer, birth tests, detection of pathogens in food, and analysis of gene expression in individual cells. Hansen said: "Our solution provides new precision for measurements in biomedical research and diagnostic research. This advancement is expected to make digital PCR a more economical, fast and routine analysis tool."

Manicure

Nail art of Manicure is a work of decorating and beautifying finger (toe) nails, also known as nail art design. Nail art is a process of disinfection, cleaning, care, maintenance, modification and beautification of the nail (toe) according to the customer's hand shape, nail shape, skin quality, clothing color and requirements. It has the characteristics of diversified manifestations.

The most commonly used nail shapes in life are: square, square, oval, pointed, round, and fan-shaped. You can create a perfect nail shape according to your hand shape and preferences.

In terms of color, darker-skinned women choose dark red, bean paste and other dark series; while women with white skin use bright color series or colorless transparent Nail Polish, it will be very beautiful; light-colored nail polish will make The fingers look slender; pink and gray-brown will soften the contours of the hand.

If you think that short nails are convenient, but on some occasions, you want your nails to look longer and longer. You can apply the entire nail when applying the nail polish, leaving a little space on both sides. At the same time, the nail polish uses a tone similar to the skin tone, like dark Pink or gray-brown. To make the nail polish dry faster, you can put the fingers of Congbao nail polish in cold water, or use quick-drying nail polish. To prevent the edge of the nail from breaking, use transparent nail paint on the underside of the edge of the nail, and then trim it every other day.

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