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Masia-Perez J.,Complejo Hospitalario Universitario Of Albacete | Valero E.,University of Castilla - La Mancha | Escribano J.,University of Castilla - La Mancha | Arribas E.,University of Castilla - La Mancha | And 5 more authors.
Match | Year: 2010

In this paper, a general mechanism of autocatalytic zymogen activation and the simultaneous action of two different, mutually exclusive, two-step inhibitors acting on both the enzyme (which simultaneously is both the activating and the activated enzyme) and the complex enzyme-zymogen is suggested and kinetically analyzed. This generalization offers the advantages of being applicable to a high number of real cases since most mechanisms of autocatalytic zymogen activation involving, reversible or irreversible, one or two step, equal or different inhibitors, with reversible steps in rapid equilibrium or not, are particular cases of the general model here studied. The number and type of the particular cases arising from the general model are obtained in a systematic way. Finally, as an example, the results obtained for the general model are applied to one of the thousands of its particular cases. Source

News Article | January 15, 2016
Site: http://www.techtimes.com/rss/sections/earth.xml

According to researchers, head crests, horns and other large ornamented structures found in dinosaurs were likely utilized in sexual displays as well as to assert social dominance. Researchers from the Queen Mary University of London came to this conclusion after analyzing Protoceratops, publishing their findings in the journal Palaeontologia Electronica. Closely resembling sheep in size, Proceratops are characterized by a large bony frill extending from the back of their heads over their necks. The researchers went over 37 specimens from fossils discovered in the Gobi desert's Djadochta Formation and from previously published research. They examined the dinosaur's bony frill for changes in width and length across four stages in the Protoceratops life: adults, near-adults, young animals and hatchling babies. Based on their findings, the researchers saw that Protoceratops had disproportionately larger bony frills depending on their size, which grew bigger as they aged. At the same time, the frills didn't just change in size but in shape as well. As the researchers observed that the bony frills were absent in young Protoceratops then suddenly became more prominent as the dinosaur matured, they suggested that the structure's function could be related to sexual selection and used for attracting suitable mates, much like how a male peacock uses its tail to gain the attention of a female. According to David Hone, one of the authors for the study, paleontologists have long had suspicions that strange features in dinosaurs are used as a show of social dominance associated with sexual display except they didn't have hard evidence to prove it. "The growth pattern we see in Protoceratops matches that ... and forms a coherent pattern from very young animals right through to large adults," he said. Through this study and others, more and more biologists are realizing that sexual selection is a major force that shaped biodiversity in the past and can mold today's. In part, it also accounts for how new species arise, the effects on extinction rates, as well as the ways animals adapt to their changing environments. Other authors for the study include Robert Knell and Dylan Wood.

News Article | December 18, 2015
Site: http://www.techtimes.com/rss/sections/environment.xml

A family out on a stroll along a Vancouver beach in Canada discovered fossilized remains of a 25-million-year-old flightless bird. The clavicle from the bird is now the second fossil discovered on southern Vancouver Island since 1895. The rare fossil was in good condition enabling researchers to identify it as an unknown variety of plotopterid, an extinct family that lived in the North Pacific from the late Eocene to the early Miocene period. Today, fossils from this type of flightless birds have only been found in the United States and Japan. When Gary Kaiser, a paleontologist and research associate at the Royal British Columbia (BC) Museum, got a hold of the fossil, he immediately looked into a local First Nations dictionary to look for an appropriate name for it. Hence, Kaiser and his colleague Junya Wantanabe of Kyoto University named the penguin-like bird as Stemec suntoku, which originates from the language of the T'Sou-Ke people. It means long-necked, black water bird. Fossils from birds are extraordinary because these are fragile. This makes these bones unable to withstand elements like heat or coldness unlike other fossils. Apparently, the sandstone and lack of water acidity contributed to the preservation of the fossil. The fossil was discovered by a father and two children when they went walking on the beach. The daughter discovered the fossil in a slab of rock. They immediately brought it to the museum for examination. Though Kaiser is convinced that the fossil is from an animal similar to a penguin, other scientists say that it looks more closely like cormorants, a species of black and diving sea birds. "It's a bit of a fight, but not unusual in biology because there's no way of telling," Kaiser added. The study announcing the discovery was published in the journal Palaeontologia Electronica. "We wish to thank L. Suntok and G. Suntok for donating the fossil of Stemec to the Royal BC Museum," the authors acknowledged in the study.

Moreno-Garcia I.M.,Electronica | Moreno-Munoz A.,Electronica | Domingo-Perez F.,Electronica | Lopez V.P.,Electronica | And 3 more authors.
2012 IEEE International Workshop on Applied Measurements for Power Systems, AMPS 2012 Proceedings | Year: 2012

This paper presents an universally deployable controller geared toward emerging Smart Grid inverter communication/control standards. The Smart Grid Inverter Interface handles communications, security, signal I/O, and processing of information for grid interoperable power converters. This paper proposes the development of a platform to the safe and intelligent management of the DG in the grid. Our work focuses on the development of a virtual instrument for the real-time monitoring, measurement of power quality and electrical parameters, the implementation of the main functions of a protective relay and the detection of power quality events, in particular sags, swells, transients and faults. © 2012 IEEE. Source

News Article | October 10, 2008
Site: bgr.com

LG is rumored to be bringing the “Incite”, a Windows Mobile Professional device, to the AT&T lineup prior to the end of the year. The Incite will sport a mirrored flush 400 x 240 touchscreen, 3MP auto-focus camera with flash, aGPS, 3.6Mbps HSDPA, and Wi-Fi. All of that contained in a full metal body that mimics the dimensions of the current LG Vu (106.95 x 55 x 13.9mm). Unlike their previous rumored attempt at an AT&T branded WinMo phone, remember the LG M25?, lets hope this one actually materializes.

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