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35 articles from ScienceDaily

Slow-growing rotavirus mutant reveals early steps of viral assembly

Rotavirus is responsible for more than 130,000 deaths in infants and young children younger than five years, every year. The virus causes severe, dehydrating diarrhea as it replicates in viral factories called viroplasms that form inside infected cells. Viroplasms have been difficult to study because they normally form very quickly, but a serendipitous observation led researchers to uncover new...

Tool to protect children's online privacy

A new study of 100 mobile apps for kids found that 72 violated a federal law aimed at protecting children's online privacy. Researchers developed a tool that can determine whether an Android game or other mobile app complies with the federal Children's Online Privacy Protection Act (COPPA).

Universal flu vaccine may be more challenging than expected

Some common strains of influenza have the potential to mutate to evade broad-acting antibodies that could be elicited by a universal flu vaccine, according to a new study. The findings highlight the challenges involved in designing such a vaccine, and should be useful in guiding its development.

Prenatal stress associated with infant gut microbes

Mother's chronic prenatal psychological distress and elevated hair cortisol concentrations are associated with gut microbiota composition of the infant, according to a new publication. The results help to better understand how prenatal stress can be connected to infant growth and development.

Deep drone acrobatics

A navigation algorithm enables drones to learn challenging acrobatic maneuvers. Autonomous quadcopters can be trained using simulations to increase their speed, agility and efficiency, which benefits conventional search and rescue operations.

Size matters in the sex life of salmon

For Atlantic salmon, size matters when it comes to love. Larger males and females that may spend up to four years at sea produce many more babies, but they are very rare compared to younger fish.

Scientists use protein, RNA to make hollow, spherical sacks called vesicles

Using protein and RNA, scientists have created hollow, spherical sacks known as vesicles. These bubble-like entities -- which form spontaneously when specific protein and RNA molecules are mixed in an aqueous buffer solution -- hold potential as biological storage compartments. They could serve as an alternative to traditional vesicles that are made from water-insoluble organic compounds called...

Towards a green future: Efficient laser technique can convert cellulose into biofuel

The plant product cellulose is the most abundant form of biomass globally and can be converted into useful products such as biofuels. However, the processing of this biopolymer is cumbersome, owing to its rigid, water-insoluble structure. To overcome this, scientists recently developed a novel laser-based technique that makes cellulose degradation easier. Because this reaction does not require...

Lack of damage after secondary impacts surprises researchers

When a material is subjected to a shock or blast wave, damage often forms internally through spall fracture, and research is needed to know how these damaged materials respond to subsequent shock waves. Recent experimentation on spall fracture in metals found that, in certain cases, there was an almost complete lack of damage with only a thin band of altered microstructure observed. Researchers...

Venus flytrap snapping mechanisms virtually captured

The Venus flytrap (Dionaea muscipula) takes only 100 milliseconds to trap its prey. Once their leaves, which have been transformed into snap traps, have closed, insects can no longer escape. Using biomechanical experiments and virtual Venus flytraps a team has analyzed in detail how the lobes of the trap move.

Getting real with immersive sword fights

Sword fights are often the weak link in virtual reality (VR) fighting games, with digital avatars engaging in battle using imprecise, pre-recorded movements that barely reflect the player's actions or intentions. Now a team has found a solution to the challenges of creating realistic VR sword fights: Touche - a data-driven computer model based on machine learning.

New opportunities for ocean and climate modelling

The continuous development and improvement of numerical models for the investigation of the climate system is very expensive and complex. At GEOMAR a new modular system has now been presented, which allows investigations to be carried in a flexible way, with varying levels of complexity. The system, called FOCI (Flexible Ocean and Climate Infrastructure), consists of different components that can...