- PhysOrg
- 21/1/19 20:00
Butterflies have evolved to produce a strongly scented chemical in their genitals that they leave behind after sex to deter other males from pursuing their women—scientists have found.
320 articles from TUESDAY 19.1.2021
Butterflies have evolved to produce a strongly scented chemical in their genitals that they leave behind after sex to deter other males from pursuing their women—scientists have found.
NASA is considering a second firing of its moon rocket engines after a critical test came up short over the weekend, a move that could bump the first flight in the Artemis lunar-landing program into next year.
The Messina Strait, a submarine bridge separating the island of Sicily from the Italian Peninsula, is the area with the largest marine litter density worldwide—more than a million objects per square kilometer in some parts–as reported in a new review paper published in the journal Environmental Research Letters. Also, over the next thirty years, the volume of rubbish in the sea could surpass...
An international team of researchers led by ETH Zurich has reconstructed solar activity back to the year 969 using measurements of radioactive carbon in tree rings. Those results help scientists to better understand the dynamics of the sun and allow more precise dating of organic materials using the C14 method.
The tropical plant genus Phyllanthus has been the subject of debate in the taxonomic world for years. About fifteen years ago it became clear that the genus with nearly 900 plant species, contains plants that are considered separate groups. "Many subgroups were created to better distinguish the diversity of the large number of species," according to Ph.D. candidate Roderick Bouman, who conducted...
Exploiting nostalgia is a well-worn emotive approach to enticing customers to purchase a product or service. New work in the International Journal of Electronic Marketing and Retailing, has looked at how a person's character affects whether or not they are susceptible to what is commonly referred to as nostalgia marketing. One of the main findings from the work is that given a high-quality product...
'What goes in, must come out' is a familiar refrain. It is especially pertinent to the challenges facing UBC researchers who are investigating methods to remove chemicals and pharmaceuticals from public water systems.
Mass spectrometers (MS) have become essential tools in chemistry and biology laboratories. The ability to quickly identify the chemical components in a sample allows them to take part in a diverse array of experiments, including radiocarbon dating, protein analysis, and monitoring drug metabolism.
It is early in the morning. Ebi and his colleagues try not to twitch as they stare intently at a rectangular box filled with sugary treats. These aren't for them, but for the honey bees that they study. The tiny buzzers toggle between the sugar 'feeder' and the hive, which are a few meters apart. Interestingly, the bees that visit the feeder aren't secretive about this new found food source. They...
Every year around 734 million tons of wheat straw are produced worldwide, a large amount of waste, which is cheap and has had no well-defined use until now. Recently, the RNM-271 Chemical Engineering and FQM-383 NANOVAL Organic Chemistry research groups at the University of Córdoba have been able to give a new use to this agricultural excess material, by using it as the foundation in order to...
Topologically tailored photonic crystals (PhC) have opened up the possibility for attaining robust unidirectional transport of classical and quantum systems. The demand for unprecedented guiding capabilities that support unhindered transport around imperfections and sharp corners at telecom wavelengths, without the need for any optimization, is fundamental for efficient distribution of information...
With the global student community taking online courses as a result of the anti-Covid-19 measures, a study led by the University of Geneva (UNIGE) reveals that online courses deepen inequalities between gifted and less gifted students by 5%. The results of the study, which was based on data collected in 2016-2017 prior to the anti-Covid lockdown initiatives, are published in the Journal of the...
An Academic Analytics Research Center (AARC) study has found greater rates of authorship of open access (OA) research articles among scholars at more prestigious institutions with greater access to resources and job security. "The open access publishing model is growing, and open access successfully democratizes the results of research projects, but it's clear now that some scholars are more...
What makes breast milk so good for babies?
Portal origin URL: Exploring the Solar Wind With A New View of Small Sun StructuresPortal origin nid: 467641Published: Tuesday, January 19, 2021 - 13:00Featured (stick to top of list): noPortal text teaser: Scientists have combined NASA data and cutting-edge image processing to gain new insight into the solar structures that create the Sun’s flow of high-speed solar...
As hemp begins to reemerge as an important crop in the United States, scientists are beginning research into the diseases that might prevent the crop from flourishing. A study published in the December issue of Plant Health Progress is one of the first to study the potential disease and disorder limitations for hemp production in the southeastern United States.
In the strawberry nursery industry, a nursery's reputation relies on their ability to produce disease- and insect-free plants. The best way to produce clean plants is to start with clean planting stock. Many nurseries struggle with angular leaf spot of strawberry, a serious disease that can result in severe losses either by directly damaging the plant or indirectly through a violation of...
Previously controversial values of the energy gap of a van der Waals material—chromium tribromide—were reported based on various optical measurements. A University of Wyoming faculty member and his research team used scanning tunneling microscopy and spectroscopy measurements that clearly reveal a much smaller energy gap value and resolved the controversy.
Nearly every galaxy hosts a monster at its center—a supermassive black hole millions to billions times the size of the Sun. While there's still much to learn about these objects, many scientists believe they are crucial to the formation and structure of galaxies. What's more, some of these black holes are particularly active, whipping up stars, dust and gas into glowing accretion disks emitting...
"The real voyage of discovery consists not in seeking new landscapes, but in having new eyes."
Scientists from the Leibniz Institute for Zoo and Wildlife Research (Leibniz-IZW) have found that interacting with other males is more "stressful" for low-ranking than for high-ranking male spotted hyenas. This restricts the time and energy low-ranking males can invest in courting the most desirable females and is therefore a key factor for their lower reproductive success than their high-ranking...
The synthetic chemicals known as PFAS, short for perfluoroalkyl and polyfluoroalkyl substances, are found in soil and groundwater where they have accumulated, posing risks to human health ranging from respiratory problems to cancer.
Having a choice of foods may accelerate aging and shorten the lifespan of fruit flies, according to a study published today in the open-access eLife journal.
Consumers of purchased foods have no way of ascertaining the quality and safety of the food that existing distribution systems deliver to their plates. Unfortunately, inappropriate refrigeration can sometimes lead to food spoilage, which is often difficult to detect. Such is the case for mackerel fish, which readily develop harmful levels of a substance called histamine when left at room...