NASA's Aeronautics Research Mission Directorate has amended its NASA Research Announcement to solicit additional research proposals. The Research Opportunities in Aeronautics 2007 has been amended to include new topics in support of the Subsonic Rotary Wing Project.

Astronomers using NASA's Hubble Space Telescope have compiled a large catalog of gravitational lenses in the distant universe. The catalog contains 67 new gravitationally lensed galaxy images found around massive elliptical and lenticular-shaped galaxies. This sample demonstrates the rich diversity of strong gravitational lenses. If this sample is representative, there would be nearly half a million similar gravitational lenses over the whole sky.

The lenses come from a recently completed, large set of observations as part of a huge project to survey a single 1.6-square-degree field of sky (nine times the area of the full Moon) with several space-based and Earth-based observatories.

In people affected by acquired immuno-deficiency syndrome it may often be observed a rise of cutaneous emergencies, whose impact spans from 25% in asyntomatic subjects to 100% in the case of very evident AIDS.

The frequency and the atypic nature of these emergencies gives a highlighted role to the dermatologist, characterizing the early diagnosis of cutaneous pathologies as the qualifying moment in the analysis of AIDS affected patient.

As the starting moment in the HIV-positive subject examination, search for injuries referable to Kaposi's sarcoma, especially at the mucous level (pharinx wounds are evident in 10 to 50% of total cases).

While current-generation solar cell technologies are too expensive and inefficient for wide-scale commercial applications, the demands of United States energy needs are spurring new advancements in improving solar cell efficiency.

A team of Northwestern University researchers has developed a new anode coating strategy that significantly enhances the efficiency of solar energy power conversion. Their paper about the work focuses on “engineering” organic material-electrode interfaces in bulk-heterojunction organic solar cells.

Introduction: Bioterrorism is the utilization of microorganisms or toxins in order to produce a disease and/or death in human beings, animals or plants. Different from conventional weaponry, relatively economic means are used that allow the elimination of living beings without destroying the surrounding atmosphere.

The most probably method for spread of bioweapons is aerial transmission, continuing into water supplies and food. The CDC (US Centers for Disease Control and Prevention, Atlanta) has subdivided into three categories the aggressiveness of "Bioweapons".

Category A comprises:

The raging eruption of dust and water from the south pole of Enceladus, Saturn's sixth-largest moon, has intrigued scientists ever since the Cassini spacecraft provided dramatic images of the phenomenon.

Physicist Nikolai Brilliantov from the University of Leicester and colleagues in Germany, have revealed why the dust particles in the plume emerge more slowly than the water vapour escaping from the moon's icy crust.

Enceladus orbits in Saturn's outermost "E" ring. It is one of only three outer solar system bodies that produce active eruptions of dust and water vapour.

Kava has been used in ceremonies and for recreational and social purposes in the South Pacific since ancient times, much like alcohol, tea or coffee is in other societies today.

In the 1980s other medicinal uses for kava began to emerge and it was marketed in herbal form as a natural way to treat conditions such as anxiety, insomnia, tension and restlessness, particularly in Europe and North America.

More recently, evidence began to emerge about the adverse affect kava could have on the liver and serious concerns about the dangers of kava and the effects on the liver have resulted in regulatory agencies, such as the US Food and Drug Administration and Australia's Therapeutic Goods Administration, banning or restricting the sale of kava and kava products.

A discovery in molecular chemistry may help remove a barrier to widespread use of diesel and other fuel-efficient "lean burn" vehicle engines. Researchers at the Department of Energy's Pacific Northwest National Laboratory have recorded the first observations of how certain catalyst materials used in emission control devices are constructed.

The PNNL team observed how barium oxide attaches itself to the surface of gamma-alumina. Barium oxide is a compound that absorbs toxic nitrogen oxide, commonly referred to as NOx, from tail-pipe emissions. Gamma alumina is a form of aluminum oxide that is used as a support for catalyst materials, such as barium oxide, that are the active ingredients in exhaust systems.

I am a biomedical engineering laboratory, I am specializing in molecular and cellular biology. Now I'm determinated to open this blog during my Experimental thesis to compare with the scientific community. Not leass important aim is to have suggestions on the design and discussion of experiments on the entire replication of the Human Cytomegalovirus This blog will be a laboratory notebook open to the scientific community. It will be active soon.

It has always been impossible to clearly photograph electrons since their extremely high velocities have produced blurry pictures. In order to capture these rapid events, extremely short flashes of light are necessary, but such flashes were not previously available.

With the use of a newly developed technology for generating short pulses from intense laser light, so-called attosecond pulses, scientists at the Lund University Faculty of Engineering in Sweden have managed to capture the electron motion for the first time.

The movie shows how an electron rides on a light wave after just having been pulled away from an atom.