A shower of matter from space millions of years ago could have led to drastic changes in the Earth’s climate, followed by the extinction of life on a massive scale, which also killed off the dinosaurs. This at least is a theory put forward by scientists from the University of Bonn. Normally, the solar wind acts as a shield against showers of cosmic particles, which prevents too many energy-rich particles from raining down on our atmosphere. Since 1997 scientists from Bonn, funded by the German Resea
Cloned cells organize into muscle, heart and kidney tissue; animals show no rejection
Boston – In a study published in the July issue of Nature Biotechnology, available on the internet June 3, researchers from Childrens Hospital Boston and colleagues demonstrated that laboratory-engineered tissues created from heart, skeletal, and renal cells cloned from cows, then transplanted back into the animals, developed into functional tissues and caused no signs of rejection.
Heart patches and functioning kidney units cloned in cows
Advanced Cell Technology, Inc. (ACT) reported today that nuclear transplantation can be used to generate functional immune-compatible tissues. The research, which will appear in the July issue (cover story) of Nature Biotechnology, by ACT and its collaborators, provides the first experimental evidence that it may be possible to use cloning to generate medically important tissues and eliminate tissue rejection. Heart
A report published today by the European Commission establishes for the first time the situation of women scientists in 30 European countries . The report is presented at a seminar opening today in Madrid and organised with the Spanish Presidency of the European Union on “Women and Science: promoting women in the scientific sector”.
The report, prepared by a group of national representatives known as the `Helsinki Group on Women and Science`, compiles national statistical profiles which ar
Brown scientists have described a previously unknown but critical blood-clotting role for Arp2/3, a complex of seven proteins found in animal and plant cells.
Reporting in the June 15 issue of Blood, the scientists show that Arp2/3 complex is a cellular machine that drives a human blood platelet to change shape into a larger, more flattened form and begin the process of clotting. The link between what happens at the surface of a platelet and the mechanism of shape change within it has mystif
Findings may lead to more effective regulations for protecting public health
Using data from one of the most comprehensive U.S. air pollution studies ever conducted, scientists at the U.S. Department of Energy’s Brookhaven National Laboratory have identified specific volatile organic compounds (VOCs) as key sources of excess ozone smog in industrial areas of Houston, Texas — which appear to be different from traditional sources of ozone pollution in typical urban areas around the co
Ph.D. candidate Lital Alfonta wins Kaye Award
Lital Alfonta, a Ph.D. candidate in the Faculty of Science at the Hebrew University of Jerusalem, has developed a fast, inexpensive test to determine if an AIDS patient has developed resistance to the medication he is taking. Ms. Alfonta was selected to receive the prestigious Kaye Innovation Award for her work, which could vastly improve treatment of AIDS patients.
Ms. Alfonta, who developed the test under the guidance of Prof.
The results of a new study suggest that rising temperatures are leaving a mark on the world. According to a report published in the current issue of the journal Science, the first flowering of plants in Britain has changed by as much as 55 days over the past few decades in response to warmer weather. The results, the scientists say, are the “strongest biological signal yet of climatic change.”
Alastair Fitter of the University of York and his father, naturalist Richard Fitter, analyzed 47 y
Rising levels of gonorrhoea and syphilis across western Europe since 1995 imply that complacency over HIV prevention efforts may have set in among individuals and some governments, argue researchers in this week’s BMJ.
Angus Nicoll and Francoise Hamers examined national trends in diagnosed HIV infections, gonorrhoea, and infectious syphilis from 1995 to 2000.
They found the numbers of new diagnoses of sexually acquired HIV infections increased by 20% in western Europe. Rates of go
Popular arthritis drugs, known as selective COX 2 inhibitors, may not be superior to traditional non-steroidal anti-inflammatory drugs, conclude researchers in this week’s BMJ.
A study published in September 2000 concluded that the COX 2 inhibitor, celecoxib, was associated with a lower rate of stomach and intestinal ulcers than two older drugs for arthritis. However, only data for the first six months of the study were published. When all the data were considered, the published results appe
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…