Technology – Page 562 – Shamskm: A site to exchange knowledge and solutions

BUND-Delegierte appellieren an Spitzen von CDU/CSU und SPD: Energiewende und biologische Vielfalt retten

Bad Hersfeld/Berlin: Bei ihrer Jahresversammlung im hessischen Bad Hersfeld haben die Delegierten des Bund für Umwelt und Naturschutz Deutschland (BUND) die Spitzen von Union und SPD aufgefordert, den Koalitionsvertrag zugunsten von mehr Umwelt- und Naturschutz zu verbessern. In seiner derzeitigen Form sichere der Vertrag nicht die natürlichen Lebensgrundlagen, sondern drohe sogar zum Gegenteil zu führen, sagte der wiedergewählte BUND-Vorsitzende Hubert Weiger. Die Energiewende werde blockiert statt engagiert fortgeführt, in der Agrarpolitik gehe es keinen Schritt voran und auch in der Verkehrspolitik drohten hoffnungsvolle Schritte zunichte gemacht zu werden. In einem Appell an die Vorsitzenden von CDU/CSU und SPD, Angela Merkel, Horst Seehofer und Sigmar Gabriel, forderten die rund 130 Delegierten der Umweltorganisation unter anderem die Steigerung des Anteils erneuerbarer Energien an der Stromerzeugung auf mindestens 45 Prozent bis 2020 und 75 Prozent bis 2030. (more…)

Natural Compound Mitigates Effects of Methamphetamine Abuse, University of Missouri Researchers Find

COLUMBIA, Mo. – Studies have shown that resveratrol, a natural compound found in colored vegetables, fruits and especially grapes, may minimize the impact of Parkinson’s disease, stroke and Alzheimer’s disease in those who maintain healthy diets or who regularly take resveratrol supplements. Now, researchers at the University of Missouri have found that resveratrol may also block the effects of the highly addictive drug, methamphetamine.

Dennis Miller, associate professor in the Department of Psychological Sciences in the College of Arts & Science and an investigator with the Bond Life Sciences Center, and researchers in the Center for Translational Neuroscience at MU, study therapies for drug addiction and neurodegenerative disorders. Their research targets treatments for methamphetamine abuse and has focused on the role of the neurotransmitter dopamine in drug addiction. Dopamine levels in the brain surge after methamphetamine use; this increase is associated with the motivation to continue using the drug, despite its adverse consequences. However, with repeated methamphetamine use, dopamine neurons may degenerate causing neurological and behavioral impairments, similar to those observed in people with Parkinson’s disease. (more…)

Curiosity Resumes Science after Analysis of Voltage Issue

NASA’s Mars rover Curiosity resumed full science operations on Saturday, Nov. 23.

Activities over the weekend included use of Curiosity’s robotic arm to deliver portions of powdered rock to a laboratory inside the rover. The powder has been stored in the arm since the rover collected it by drilling into the target rock “Cumberland” six months ago. Several portions of the powder have already been analyzed. The laboratory has flexibility for examining duplicate samples in different ways. (more…)

Evidence of 3.5 billion-year-old bacterial ecosystems found in Australia

Washington, D.C.— Reconstructing the rise of life during the period of Earth’s history when it first evolved is challenging. Earth’s oldest sedimentary rocks are not only rare, but also almost always altered by hydrothermal and tectonic activity. A new study from a team including Carnegie’s Nora Noffke, a visiting investigator, and Robert Hazen revealed the well-preserved remnants of a complex ecosystem in a nearly 3.5 billion-year-old sedimentary rock sequence in Australia. Their work is published in Astrobiology.

The Pilbara district of Western Australia constitutes one of the famous geological regions that allow insight into the early evolution of life. Mound-like deposits created by ancient photosynthetic bacteria, called stromatolites, and microfossils of bacteria have been described by scientists in detail. However, a phenomenon called microbially induced sedimentary structures, or MISS, had not previously been seen in this region. These structures are formed from mats of microbial material, much like mats seen today on stagnant waters or in coastal flats. (more…)

29 Aktivisten gegen Kaution aus Gefängnis entlassen: Colin Russell nach wie vor in Untersuchungshaft

Phil Ball aus England verließ heute als Letzter der 29 auf Kaution freigelassenen Aktivisten das Gefängnis in St. Petersburg. Für den Australier Colin Russell wurde für Donnerstag ein neuer Termin vor Gericht anberaumt, bei dem ein Antrag auf Freilassung gegen Kaution angehört wird. Für Russell war die Untersuchungshaft bis Ende Februar verlängert worden.

Noch ist es nicht sicher, ob die Aktivisten, die nicht aus Russland stammen, das Land verlassen und in ihre Heimatländer zurückkehren dürfen. Phil Balls Bruder Steve freut sich über das Ende der Untersuchungshaft: (more…)

Compound stymies polyomaviruses in lab

There is no approved medicine to treat polyomaviruses, which afflict people with weakened immune systems, but scientists have found that a chemical compound called Retro-2 is able to reduce significantly the infectivity and spread of the viruses in lab cell cultures. Now they are working to improve it.

PROVIDENCE, R.I. [Brown University] — A team of scientists reports that a small-molecule compound showed significant success in controlling the infectivity and spread of three polyomaviruses in human cell cultures. To date there has been no medicine approved to treat such viruses, which prey on transplant recipients, people with HIV, and others whose immune systems have been weakened. (more…)

Keeping Our Nuclear Stockpile Safe and Ready

Testing nuclear weapons is banned by treaty, so the only way to ensure our stockpile’s safety and readiness is virtual weapons testing using the world’s fastest supercomputers to crunch lab data.

In 2010 the Pentagon revealed it had a total of 5,113 warheads in its nuclear stockpile, down from a peak of 31,225 at the height of the Cold War in 1967. (more…)

Colossal New Predatory Dino Terrorized Early Tyrannosaurs

A new species of carnivorous dinosaur – one of the three largest ever discovered in North America – lived alongside and competed with small-bodied tyrannosaurs 98 million years ago. This newly discovered species, Siats meekerorum, (pronounced see-atch) was the apex predator of its time, and kept tyrannosaurs from assuming top predator roles for millions of years.

Named after a cannibalistic man-eating monster from Ute tribal legend, Siats is a species of carcharodontosaur, a group of giant meat-eaters that includes some of the largest predatory dinosaurs ever discovered. The only other carcharodontosaur known from North America is Acrocanthosaurus, which roamed eastern North America more than 10 million years earlier. Siats is only the second carcharodontosaur ever discovered in North America; Acrocanthosaurus, discovered in 1950, was the first. (more…)