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Updated: 3 hours 14 min ago
Fish biomass in the ocean may be 10 times higher than estimated: Stock of mesopelagic fish changes from 1,000 to 10,000 million tons
With a stock estimated at 1,000 million tons so far, mesopelagic fish dominate the total biomass of fish in the ocean. However, scientists have found that their abundance could be at least 10 times higher. The results are based on the acoustic observations conducted during the circumnavigation of the Malaspina Expedition.
An interdisciplinary study has shown for the first time that 'click chemistry' can be used to assemble DNA that is functional in human cells, which paves the way for a purely chemical method for gene synthesis. Human cells can still read through strands of DNA correctly despite being stitched together using a linker not found in nature.
Thermoelectric devices can cool materials by passing currents, or convert temperature differences into electric power. However, especially metallic structures have a very poor thermoelectric performance, and therefore most thermoelectrics are made of semiconductors. Now researchers have shown how a proper combination of magnetic metals and superconductors could allow reaching very strong thermoelectric conversion efficiency.
One of the issues of the Atapuerca sites that generates the most scientific debate is the dating of the strata where the fossils are found. A study has clarified that the sediment of Gran Dolina, where the first remains of Homo antecessor were discovered in 1994, is 900,000 years old. The findings at the Lower Palaeolithic cave site of Gran Dolina, in the Sierra de Atapuerca mountain range (Burgos), have led to major advancements in our knowledge of human evolution and occupation of Eurasia.
Researchers have developed a blueprint to help zoos plan strategies for the conservation of native wildlife in and around their gardens.
Septic shock is caused by excessive and systemic reaction of the entire body against infectious agents, in most cases of bacterial origin. The number of deaths by septic shock in intensive care units is very high and is still increasing, despite numerous large scale clinical trials. Scientists demonstrated in a mouse study that a potential novel treatment for sepsis may consist of the simultaneous neutralization of two harmful cytokines in the blood circulation, namely interleukin-1 and interleukin-18.
The lipid-rich membranes of cells are largely impermeable to proteins, but evolution has provided a way through -- in the form of transmembrane tunnels. A new study shows in unmatched detail what happens as proteins pass through such a pore.
A promising compound for cancer treatment has been synthesized in a laboratory by a PhD student.
A new study on workplace romances has found that company culture contributes to how coworkers view workplace romances. The authors propose that, often, more relaxed office environments don't have official policies on interoffice relationships, making them more acceptable, while more formal offices have strict policies in place, which distinguish them as inappropriate and unprofessional.
Despite strokes being on the decline in the U.S., more women are dying from them than are men. Now medical scientists have released guidance on prevention specifically for women.
Domoic acid accumulates in seafood and is toxic to the brain. Research indicates that the toxin damages kidneys at concentrations that are 100 times lower than what causes neurological effects.
Hospitalized patients who recovered from acute kidney injury had a 67% increased risk of experiencing coronary events or dying during a recent study, suggesting that there is a linkage between the two. Acute kidney injury’s harmful effects on heart health were comparable to those attributed to diabetes.
A process that turns on photosynthesis in plants likely developed on Earth in ancient microbes 2.5 billion years ago, long before oxygen became available, according to new research.
Nursing researchers find adverse outcomes are linked to turnover in studies of a sample representing more than 16,000 nursing homes in the United States, suggesting that preventing staff turnover should be given greater emphasis.
A genetic mechanism that controls the production of a large spike-like protein on the surface of Staphylococcus aureus (staph) bacteria alters the ability of the bacteria to form clumps and to cause disease, according to a new study.
The United States' predominance in science and technology eroded further during the last decade, as several Asian nations -- particularly China and South Korea -- rapidly increased their innovation capacities.
A team of researchers has developed a multifunctional nanoparticle that enables magnetic resonance imaging to pinpoint blood vessel plaques caused by atherosclerosis. The technology is a step toward creating a non-invasive method of identifying plaques vulnerable to rupture -- the cause of heart attack and stroke -- in time for treatment.
Neuroscientists have uncovered the existence of loose coupling between calcium channels and release sensors of exocytosis at a mature central synapse in the rodent brain. The researchers show that loose coupling provides a framework for presynaptic plasticity, a hallmark of synaptic signaling in hippocampal microcircuits.
To address what they call persistent gender, racial, and ethnic bias in academia, scholars have recommended specific, rigorous interventions that lead to positive outcomes.
Women who take aspirin daily may reduce their risk of ovarian cancer by 20 percent, according to a study. However, further research is needed before clinical recommendations can be made.