Erasing molecular memory of parents could shed light on clones.
Cells naturally wipe out the mark of their parents in 24 hours, say cloning experts. Exactly how may begin to explain the way that animal clones and stem cells are reprogrammed. Not all genes are born equal. In mammals, some genes are imprinted – cells switch on only the copy inherited from mum or dad, not both. This sex stamp must be erased and rewritten in sperm and egg cells, however, so they are correctly labelled as
Communication, clearly essential to humans, is also essential to cells, their elemental building blocks. In order to preserve organic cohesion, cells need to communicate with their environment, but they also need to ensure adequate communication between their various compartments.
These forms of intracellular exchange are essential and require the setting up of actual networks. Membrane transport tubes were evidenced some years ago, but their formation has up till now remained a mystery.
The impact of heat on death rates begins at relatively low temperatures during hot weather, finds research in the Journal of Epidemiology and Community Health.
Researchers analysed temperature readings from the Meteorological Office and death rates from the Office of National Statistics for London between 1976 and 1996.
They found that death rates associated with heat started rising at about 19 degrees Centigrade (66 degrees Farenheit), and once above 21.5 degrees Centigrade (abou
Women who work during pregnancy are almost five times as likely to develop pre-eclampsia, concludes research in the Journal of Epidemiology and Community Health.
In pre-eclampsia abnormally high blood pressure, blood poisoning, and swelling develop. Pre-eclampsia can be dangerous for both mother and child.
The blood pressure of 933 women in their early to late 20s was monitored over 24 hours while they went about their daily routines. The women were all between 18 and 24 weeks of pr
Optimism about the success of heart and lung transplants at the start of the 1990s is not supported by the evidence, shows an audit of the procedure, published in Heart.
Transplants continue to be hampered by the high death rates after surgery and a shortage of suitable donors, finds the study. Almost half of those waiting for a lung transplant will not receive one, and at least a quarter will die within two years of being listed.
All nine UK units performing heart, lung, or heart
Brass instrument makers could soon be using the latest technology to refine the manufacturing of trumpets and cornets. An improved way of taking internal measurements of musical instruments, published today in the Institute of Physics journal, Measurement Science and Technology, has been developed by scientists at the University of Edinburgh, the Open University and Smith-Watkins Brass.
In a trumpet or cornet the musical qualities of the instrument, for example the tone, response and intonat
One lump of rock is revealed as two in the distant Kuiper belt.
The stand-offish dance of two asteroids at the outer reaches of the Solar System is captivating astronomers. The two rocky objects, discovered locked in mutual orbit, could tell us about the properties of the far-flung Kuiper belt.
Christian Veillet and his team 1 studied an object called 1998 WW31 in the Kuiper belt, a sparsely populated region of space beyond the orbit of Neptune. The object w
Two cricket-like creatures establish new insect group.
The first new order of insects to be discovered for more than 80 years has emerged from the mountains of Namibia. The orders first official members are two creatures about 2 cm long that look a bit like a cross between a cricket and a stick insect 1 .
The group, called Mantophasmatodea, joins the other 30 or so insect orders such as beetles, flies and termites. “If it was in mammals itd be like
Between now and Saturday, 20 April, you can follow via the Internet the progress of the new-found Comet SOHO-422. Usually, comets seen by the SOHO spacecraft quickly burn up in the Suns hot atmosphere. This one wont, so there is still time to monitor its progress.
Like most of the hundreds of comets found with the ESA-NASA sun-watching spacecraft, SOHO-422 was first noticed by an amateur astronomer. Pictures from SOHO are made available, freely and rapidly, on the Internet. Peop
P3P gives people more control over use of personal information on the Web
The World Wide Web Consortium (W3C) has issued the Platform for Privacy Preferences (P3P) 1.0 as a W3C Recommendation, representing cross-industry agreement on an XML-based language for expressing Web site privacy policies. Declaring P3P a W3C Recommendation indicates that it is a stable document, contributes to Web interoperability, and has been reviewed by the W3C Membership, who favor its widespread adoption.
Interfacial diffusion of nanoparticles strongly affected by their shape and surface coating. Named for a Roman god, Janus particles refer to nanoparticles that possess surfaces with two or more distinct…
24 Jan 2022, at 2 p.m. EST, Webb fired its onboard thrusters for nearly five minutes (297 seconds) to complete the final postlaunch course correction to Webb’s trajectory. This mid-course correction…
Team of biologists from the University of Magdeburg identifies causes of vascular damage in severe cases of COVID-19. Scientists from the Institute of Biology at Otto von Guericke University Magdeburg…
High-speed X-ray free-electron lasers have unlocked the crystal structures of small molecules relevant to chemistry and materials science, proving a new method that could advance semiconductor and solar cell development….
Project consortium presents powerful IT infrastructure for innovative dual-arm AUV. Autonomous underwater vehicles (AUVs), operated and controlled by artificial intelligence (AI) methods, inspect, maintain, and repair offshore installations underwater. A…