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Categories: Biology: Evolutionary, Engineering: Graphene

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Published

Molecular fossils shed light on ancient life      (via sciencedaily.com)     Original source 

Paleontologists are getting a glimpse at life over a billion years in the past based on chemical traces in ancient rocks and the genetics of living animals. New research combines geology and genetics, showing how changes in the early Earth prompted a shift in how animals eat.

Chemistry: Biochemistry Chemistry: General Chemistry: Inorganic Chemistry Chemistry: Organic Chemistry Engineering: Graphene Physics: Optics
Published

Chemists create organic molecules in a rainbow of colors      (via sciencedaily.com)     Original source 

Chemists have now come up with a way to make molecules known as acenes more stable, allowing them to synthesize acenes of varying lengths. Using their new approach, they were able to build molecules that emit red, orange, yellow, green, or blue light, which could make acenes easier to deploy in a variety of applications.

Chemistry: General Engineering: Graphene Geoscience: Earthquakes Geoscience: Environmental Issues Geoscience: Geochemistry
Published

Recycling concrete using carbon can reduce emissions and waste      (via sciencedaily.com)     Original source 

Amid the rubble of large-sale earthquake, war or other disaster -- and as ageing buildings and infrastructure are replaced -- mountains of concrete are often taken to landfill or pounded into rubble for roads. For a more sustainable approach, experts are developing a 'value add' for old broken concrete to 'upcycling' coarse aggregate to produce a strong, durable and workable concrete using a small amount of a secret ingredient -- graphene.

Engineering: Graphene Offbeat: Computers and Math Offbeat: General Physics: Optics
Published

Tiny electromagnets made of ultra-thin carbon      (via sciencedaily.com)     Original source 

Graphene, that is extremely thin carbon, is considered a true miracle material. An international research team has now added another facet to its diverse properties with new experiments: Experts fired short terahertz pulses at micrometer-sized discs of graphene, which briefly turned these minuscule objects into surprisingly strong magnets. This discovery may prove useful for developing future magnetic switches and storage devices.

Biology: Biochemistry Biology: Evolutionary Biology: General Biology: Zoology Ecology: Nature Offbeat: General Offbeat: Paleontology and Archeology Offbeat: Plants and Animals Paleontology: Fossils Paleontology: General
Published

Earliest-known fossil mosquito suggests males were bloodsuckers too      (via sciencedaily.com)     Original source 

Researchers have found the earliest-known fossil mosquito in Lower Cretaceous amber from Lebanon. What's more, the well-preserved insects are two males of the same species with piercing mouthparts, suggesting they likely sucked blood. That's noteworthy because, among modern-day mosquitoes, only females are hematophagous, meaning that they use piercing mouthparts to feed on the blood of people and other animals.

Biology: Biochemistry Biology: Evolutionary Biology: General Biology: Marine Biology: Zoology Ecology: Endangered Species Ecology: Extinction Ecology: Invasive Species Ecology: Nature Ecology: Research Ecology: Sea Life Ecology: Trees Offbeat: General Offbeat: Paleontology and Archeology Offbeat: Plants and Animals Paleontology: Climate Paleontology: Fossils Paleontology: General
Published

Crocodile family tree mapped: New light shed on croc evolution      (via sciencedaily.com)     Original source 

Around 250 million years ago, 700 species of reptiles closely related to the modern-day crocodile roamed the earth, now new research reveals how a complex interplay between climate change, species competition and habitat can help explain why just 23 species of crocodile survive today.     

Biology: Evolutionary Biology: General Biology: Zoology Ecology: Animals Ecology: General Ecology: Nature Ecology: Research Environmental: Water
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Snake skulls show how species adapt to prey      (via sciencedaily.com)     Original source 

By studying the skull shapes of dipsadine snakes, researchers have found how these species of snakes in Central and South America have evolved and adapted to meet the demands of their habitats and food sources.

Anthropology: Early Humans Anthropology: General Biology: Biochemistry Biology: Evolutionary Biology: General Biology: Genetics Ecology: Animals
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A mixed origin made maize successful      (via sciencedaily.com)     Original source 

Maize is one of the world's most widely grown crops. It is used for both human and animal foods and holds great cultural significance, especially for indigenous peoples in the Americas. Yet despite its importance, the origins of the grain have been hotly debated for more than a century. Now new research shows that all modern maize descends from a hybrid created just over 5000 years ago in central Mexico, thousands of years after the plant was first domesticated.

Biology: Biochemistry Biology: Biotechnology Biology: Cell Biology Biology: Evolutionary Biology: General Biology: Microbiology Geoscience: Geochemistry
Published

Armed to the hilt: Study solves mystery behind bacteria's extensive weaponry      (via sciencedaily.com)     Original source 

A new study tackles the mystery of why bacteria often carry diverse ranges of weapons. The findings show that different weapons are best suited to different competition scenarios. Short-range weapons help bacteria to invade established communities; long-range weapons are useful once established.

Biology: Biochemistry Biology: Cell Biology Biology: Evolutionary Biology: General Biology: Genetics Biology: Zoology Ecology: Animals
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The venom preceded the stinger: Genomic studies shed light on the origins of bee venom      (via sciencedaily.com)     Original source 

Bees, wasps and ants belong to the Hymenoptera order and inject a whole cocktail of venomous ingredients when they sting. Despite their tremendous ecological and economic importance, little was previously known about the origins of their venom. Through extensive genomic studies, a team of researchers has now discovered that typical venomous components were already present in the earliest ancestors of Hymenoptera and must therefore have evolved before the stingers of bees and other insects. What's more, and contrary to previous assumptions, the gene for the venom melittin is found solely in bees.

Biology: Biochemistry Biology: Biotechnology Biology: Cell Biology Biology: Developmental Biology: Evolutionary Biology: General Biology: Genetics Biology: Microbiology
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Tracing the evolution of the 'little brain'      (via sciencedaily.com)     Original source 

The evolution of higher cognitive functions in humans has so far mostly been linked to the expansion of the neocortex. Researchers are increasingly realizing, however, that the 'little brain' or cerebellum also expanded during evolution and probably contributes to the capacities unique to humans. A research team has now generated comprehensive genetic maps of the development of cells in the cerebella of human, mouse and opossum. Comparisons of these maps reveal both ancestral and species-specific cellular and molecular characteristics of cerebellum development.

Biology: Biochemistry Biology: Botany Biology: Evolutionary Biology: General Biology: Microbiology Environmental: General
Published

A spectrum of possibilities: Insights into the evolution of far-red light photosynthesis      (via sciencedaily.com)     Original source 

Scientists have unraveled the evolutionary journey of a unique type of photosynthesis that allows some bacteria to harness far-red light, a region beyond the visible spectrum. This discovery could pave the way for engineering plants with enhanced light absorption capabilities and has implications for our search for extraterrestrial life.

Biology: Evolutionary Offbeat: General Offbeat: Paleontology and Archeology Offbeat: Plants and Animals Paleontology: General
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How shifting climates may have shaped early elephants' trunks      (via sciencedaily.com)     Original source 

Researchers have provided new insights into how ancestral elephants developed their dextrous trunks.  A study of the evolution of longirostrine gomphotheres, an ancestor of the modern day elephant, suggests moving into open-land grazing helped develop their coiling and grasping trunks.

Biology: Biochemistry Biology: Cell Biology Biology: Evolutionary Biology: General Biology: Genetics Biology: Microbiology Geoscience: Geochemistry
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Study provides fresh insights into antibiotic resistance, fitness landscapes      (via sciencedaily.com)     Original source 

A new study suggests that E. coli bacteria may have a higher capability to evolve antibiotic resistance than previously believed. Researchers mapped possible mutations in an essential E. coli protein involved in antibiotic resistance and found that 75% of evolutionary paths led to high antibiotic resistance, challenging existing theories about fitness landscapes in evolutionary biology. This discovery may have broader implications for understanding adaptation and evolution in various fields.

Biology: Biochemistry Biology: Evolutionary Biology: General Ecology: Animals
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Skunks' warning stripes less prominent where predators are sparse, study finds      (via sciencedaily.com)     Original source 

Striped skunks are less likely to evolve with their famous and white markings where the threat of predation from mammals is low, scientists have discovered.

Biology: Biochemistry Biology: Botany Biology: Evolutionary Biology: General Biology: Genetics Biology: Microbiology Ecology: Nature
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A stronger core for better plant breeding      (via sciencedaily.com)     Original source 

A new software tool with enhanced genome-sequencing powers has been developed, increasing the speed and accuracy at which researchers can improve plants through breeding.