Frozen mammoth skin retained its chromosome structure
Features as small as 50 nanometers preserved in a 50,000-year-old sample. Enlarge (credit: LEONELLO CALVETTI/SCIENCE PHOTO LIBRARY) One of the challenges of working with ancient DNA samples is that damage accumulates ove.....»»
NASA data shows fierce surface temperatures during Phoenix heat wave
Streets and other built surfaces in the region absorbed and retained heat long after sunset and grew hotter over many days of persistent high temperatures......»»
Peculiarities of the germline-restricted chromosome of songbirds
In multicellular organisms, all cells of an individual normally contain the same genetic information and cell differentiation is achieved through regulation of gene expression. There are exceptions, however, where, instead of silencing, certain seque.....»»
Vaccination campaign protects endangered wild cattle from highly contagious potentially fatal skin disease
Scientists from the Wildlife Conservation Society (WCS), the Ministry of Environment, and the Ministry of Agriculture Forestry and Fisheries of the Royal Government of Cambodia have documented the first case of lumpy skin disease (LSD) in wildlife in.....»»
"Spider-like" mitochondrial structure initiates cell-wide stress response
Often referred to as the "powerhouses of the cell," mitochondria are well known for their role as energy suppliers, but these organelles are also critical for maintaining our overall health. Mitochondrial stress is associated with aging and age-relat.....»»
Experimental constraints on the viscosity of the Earth"s inner core
Although many geodynamical mechanisms have been proposed regarding the origin of the observed complex structure of Earth's inner core, no clear consensus has been reached. This is partly due to the lack of accurate knowledge of the viscosity in the i.....»»
James Webb telescope captures the gorgeous Ring Nebula in stunning detail
A new image from the James Webb Space Telescope shows the stunning Ring Nebula -- a gorgeous structure of dust and gas located in the constellation of Lyra......»»
New strategy decodes dynamic structure of proteins within cells
Protein dynamics play a crucial role in diverse functions. The intracellular environment significantly influences protein dynamics, particularly for intrinsically disordered proteins (IDPs)......»»
What’s going on with the reports of a room-temperature superconductor?
Rumors are flying of confirmation, but the situation is still frustratingly vague. Enlarge / The normal structure of the material (left) and distortions that occur once copper is substituted in (right). (credit: Sinéad Griffin).....»»
Deep learning for new protein design
The key to understanding proteins—such as those that govern cancer, COVID-19, and other diseases—is quite simple: Identify their chemical structure and find which other proteins can bind to them. But there's a catch......»»
New, simple and accessible method creates potency-increasing structure in drugs
Chemical structures called cyclopropanes can increase the potency and fine-tune the properties of many drugs, but traditional methods to create this structure only work with certain molecules and require highly reactive—potentially explosive—ingr.....»»
Nanorings: New building blocks for chemistry
Sandwich compounds are special chemical compounds used as basic building blocks in organometallic chemistry. So far, their structure has always been linear......»»
Novel method reveals energy-dependent radiation damage to milled lamella by focused ion beam
Compared with the purified protein in vitro, intracellular biological macromolecules present a more complete and physiological conformation. Therefore, studying the three-dimensional structure of protein directly in vivo is the next goal of structura.....»»
Earth"s most ancient impact craters are disappearing
Earth's oldest craters could give scientists critical information about the structure of the early Earth and the composition of bodies in the solar system as well as help to interpret crater records on other planets. But geologists can't find them, a.....»»
Apple TV is the frontrunner to land streaming deal for Pac-12 conference, similar structure to MLS Season Pass
Although a deal is not yet approved, Apple looks set to land the streaming rights for the Pac-12 sports conference. As reported by ESPN’s Pet Thamel, the Pac-12 hosted a meeting today with its conference schools, proposing Apple as their new TV rig.....»»
New method improves proton acceleration with high power laser using frozen hydrogen as target
Bringing protons up to speed with strong laser pulses—this still young concept promises many advantages over conventional accelerators. For instance, it seems possible to build much more compact facilities. Prototypes to date, however, in which las.....»»
James Webb captures vast structure created by newborn stars
Newborn stars are often active and glow brightly, but on rare occasions they create something epic: a vast two-lobed structure called a Herbig-Haro object......»»
Ocean skin helps regulate ocean carbon uptake, study finds
At less than one millimeter thick, the ocean skin—the ocean's uppermost layer—plays an outsized role in marine processes, orchestrating heat and chemical exchange between the sea and sky via diffusion. The water of the skin is cooler by about 0.2.....»»
Unveiling the 3D structure and molecular mechanism of platelet drug transporter ABCC4
A research team led by Prof. Chen Yuxing and Prof. Zhou Cong from the University of Science and Technology of China (USTC) of the Chinese Academy of Sciences (CAS) recently utilized single-particle cryogenic electron microscopy (cryo-EM) to decipher.....»»
Advances in producing the anti-HIV compound Lancilactone C
In a study published in the Journal of the American Chemical Society, researchers appear to have discovered a way to produce a true structure of the rare but naturally-occurring anti-HIV compound Lancilactone C from start to finish......»»
How molecular entanglements determine the structure of polymers
The structure of semicrystalline polymers largely depends on how strongly their molecular chains are entangled. This has been shown in a new study by researchers from Martin Luther University Halle-Wittenberg (MLU), which was published in the journal.....»»