The asymmetric units of the title compounds, namely, catena-poly[[(1,4,8,11-tetra­aza­cyclo­tetra­decane-κ4N1,N4,N8,N11)nickel(II)]-μ-1,3-bis­(3-carboxyl­ato­prop­yl)tetra­methyl­disiloxane-κ2O:O'], [Ni(C10H24O5Si2)(C12H24N4)]n (I), and catena-poly[[[(1,4,8,11-tetra­aza­cyclo­tetra­decane-κ4N1,N4,N8,N11)nickel(II)]-μ-4-({[(3-carb­oxy­prop­yl)di­methyl­sil­yl]­oxy}di­methyl­sil­yl)butano­ato-κ2O:O'] per­chlorate], {[Ni(C10H25O5Si2)(C12H24N4)]ClO4}n (II), consist of one (in I) or two crystallographically non-equivalent (in II) centrosymmetric macrocyclic cations and one centrosymmetric dianion (in I) or two centrosymmetric monoanions (in II). In each compound, the metal ion is coordinated by the four secondary N atoms of the macrocyclic ligand, which adopts the most energetically stable trans-III conformation, and the mutually trans O atoms of the carboxyl­ate in a slightly tetra­gonally distorted trans-NiN4O2 octa­hedral coordination geometry. The crystals of both types of compounds are composed of parallel polymeric chains of the macrocyclic cations linked by the anions of the acid running along the [101] and [110] directions in I and II, respectively. In I, each polymeric chain is linked to four neighbouring ones by hydrogen bonding between the NH groups of the macrocycle and the carboxyl­ate O atoms, thus forming a three-dimensional supra­molecular network. In II, each polymeric chain contacts with only two neighbours, forming hydrogen bonds between the partially protonated carb­oxy­lic groups of the bridging ligand. As a result, a lamellar structure is formed with the layers oriented parallel to the (1overline{1}1) plane.

The syntheses and crystal structures of three mol­ecular salts of protonated 3,4-di­amino­benzoic acid, viz. 2-amino-5-carb­oxy­anilinium chloride, C7H9N2O2+·Cl−, (I), 2-amino-5-carb­oxy­anilinium bromide, C7H9N2O2+·Br−, (II), and 2-amino-5-carb­oxy­anilinium nitrate monohydrate, C7H9N2O2+·NO3−·H2O, (III), are described. The cation is protonated at the meta-N atom (with respect to the carb­oxy group) in each case. In the crystal of (I), carb­oxy­lic acid inversion dimers linked by pairwise O—H⋯O hydrogen bonds are seen and each N—H group forms a hydrogen bond to a chloride ion to result in (100) undulating layers of chloride ions bridged by the inversion dimers into a three-dimensional network. The extended structure of (II) features O—H⋯Br, N—H⋯Br and N—H⋯O hydrogen bonds: the last of these generates C(7) chains of cations. Overall, the packing in (II) features undulating (100) sheets of bromide ions alternating with the organic cations. Inter­molecular inter­actions in the crystal of (III) include O—H⋯O, O—H⋯(O,O), N—H⋯O, N—H⋯N and O—H⋯N links. The cations are linked into (001) sheets, and the nitrate ions and water mol­ecules form undulating chains. Taken together, alternating (001) slabs of organic cations plus anions/water mol­ecules result. Hirshfeld surfaces and fingerprint plots were generated to give further insight into the inter­molecular inter­actions in these structures. The crystal used for the data collection of (II) was twinned by rotation about [100] in reciprocal space in a 0.4896 (15):0.5104 (15) ratio.

With the emergence of X-ray free-electron lasers, it is possible to investigate the structure of nanoscale samples by employing coherent diffractive imaging in the X-ray spectral regime. In this work, we developed a refinement method for structure reconstruction applicable to low-quality coherent diffraction data. The method is based on the gradient search method and considers the missing region of a diffraction pattern and the small number of detected photons. We introduced an initial estimate of the structure in the method to improve the convergence. The present method is applied to an experimental diffraction pattern of an Xe cluster obtained in an X-ray scattering experiment at the SPring-8 Angstrom Compact free-electron LAser (SACLA) facility. It is found that the electron density is successfully reconstructed from the diffraction pattern with a large missing region, with a good initial estimate of the structure. The diffraction pattern calculated from the reconstructed electron density reproduced the observed diffraction pattern well, including the characteristic intensity modulation in each ring. Our refinement method enables structure reconstruction from diffraction patterns under difficulties such as missing areas and low diffraction intensity, and it is potentially applicable to the structure determination of samples that have low scattering power.

Efficient infiltration of a mesoporous titania matrix with conducting organic polymers or small molecules is one key challenge to overcome for hybrid photovoltaic devices. A quantitative analysis of the backfilling efficiency with time-of-flight grazing incidence small-angle neutron scattering (ToF-GISANS) and scanning electron microscopy (SEM) measurements is presented. Differences in the morphology due to the backfilling of mesoporous titania thin films are compared for the macromolecule poly[4,8-bis­(5-(2-ethyl­hexyl)­thio­phen-2-yl)benzo[1,2-b;4,5-b']di­thio­phene-2,6-diyl-alt-(4-(2-ethyl­hexyl)-3-fluoro­thieno[3,4-b]thio­phene-)-2-carboxyl­ate-2-6-diyl)] (PTB7-Th) and the heavy-element containing small molecule 2-pinacol­boronate-3-phenyl­phen­anthro[9,10-b]telluro­phene (PhenTe-BPinPh). Hence, a 1.7 times higher backfilling efficiency of almost 70% is achieved for the small molecule PhenTe-BPinPh compared with the polymer PTB7-Th despite sharing the same volumetric mass density. The precise characterization of structural changes due to backfilling reveals that the volumetric density of backfilled materials plays a minor role in obtaining good backfilling efficiencies and interfaces with large surface contact.

In this paper, the conformational polymorphism of a chlorinated diketo­pyrrolo­pyrrole (DPP) dye having flexible substituents in a non-hydrogen-bonding system is reported. The propyl-substituted DPP derivative (PR3C) has three polymorphic forms, each showing a different colour (red, orange and yellow). All polymorphs could be obtained concomitantly under various crystallization conditions. The results of the crystal structure analysis indicate that PR3C adopts different conformations in each polymorph. The packing effect caused by the difference in the arrangement of neighbouring molecules was found to play an important role in the occurrence of the observed polymorphism. The thermodynamic stability relationship between the three polymorphs was identified by thermal analysis and indicates that the yellow polymorph is the thermally stable form. The results indicate that the yellow form and orange form are enantiotropically related, and the other polymorph is monotropically related to the others.

The laser annealing process for AuNi nanoparticles has been visualized using coherent X-ray diffraction imaging (CXDI). AuNi bimetallic alloy nanoparticles, originally phase separated due to the miscibility gap, transform to metastable mixed alloy particles with rounded surface as they are irradiated by laser pulses. A three-dimensional CXDI shows that the internal part of the AuNi particles is in the mixed phase with preferred compositions at ∼29 at% of Au and ∼90 at% of Au.

Recently, researchers from Boston University and the Smithsonian Tropical Research Institute in Panama have been taking a closer look at the vibrations that red-eyed treefrog embryos use as cues to trigger early hatching. They discovered that treefrog embryos can evaluate different features of vibrations.

The post Researchers discover treefrog embryos can evaluate different features of vibrations appeared first on Smithsonian Insider.

Two very different models explain the possible origin of Type Ia supernovae, and different studies support each model. New evidence shows that both models are correct - some of these supernovae are created one way and some the other.

The post One supernova type, two different sources appeared first on Smithsonian Insider.

The main mass of a rare meteorite that exploded over California’s Sierra foothills in April 2012 will be preserved for current and future scientific discoveries, […]

The post Pieces of rare meteorite land at five different academic institutions appeared first on Smithsonian Insider.

National Zoo Veterinarian Katharine Hope treats about 2,000 animals from 400 different species. She and her colleagues care for a variety of animals, from small baby flamingos to adult Asian elephants, so there's no such thing as an average day.

The post National Zoo veterinarian Katharine Hope is in charge of the health of 2,000 animals from 400 different species. appeared first on Smithsonian Insider.

The inversion of X-ray reflectivity to reveal the topography of a one-dimensional interface is evaluated through model calculations.

The search for life elsewhere in the solar system and beyond should include efforts to detect what scientists sometimes refer to as weird life -- that is, life with an alternative biochemistry to that of life on Earth -- says a new report from the National Research Council.

Despite being used for several decades, test-based incentives have not consistently generated positive effects on student achievement, says a new report from the National Research Council.

Research to date on the effect of capital punishment on homicide rates is not useful in determining whether the death penalty increases, decreases, or has no effect on these rates, says a new report from the National Research Council.

The U.S. electric power delivery system is vulnerable to terrorist attacks that could cause much more damage to the system than natural disasters such as Hurricane Sandy, blacking out large regions of the country for weeks or months and costing many billions of dollars, says a newly released report by the National Research Council.

Producing more precise county-level estimates of crops and farmland cash rents will require integrating multiple data sources using model-based predictions that are more transparent and reproducible, says a new report from the National Academies of Sciences, Engineering, and Medicine.

A new report from the National Academies of Sciences, Engineering, and Medicine calls for an international, multi-institutional comprehensive campaign of research, observation, and analysis activities that would help improve understanding and prediction of the Gulf of Mexico’s Loop Current System (LCS).

A systemwide change to the culture and climate in higher education is needed to prevent and effectively respond to sexual harassment, says a new report from the National Academies of Sciences, Engineering, and Medicine.

Following recommendations from a National Academies of Sciences, Engineering, and Medicine report released earlier this year, the National Academies’ Gulf Research Program (GRP) is developing a long-term research campaign to improve understanding and prediction of the Gulf of Mexico Loop Current System (LCS).

The Gulf Research Program (GRP) of the National Academies of Sciences, Engineering, and Medicine today announced a new funding opportunity to provide up to $2.5 million in grants to foster innovative approaches that support its ongoing efforts to improve understanding and prediction of the Gulf of Mexico Loop Current System (LCS).

Current evidence supports the classification of the contemporary red wolf as a distinct species of wolf, although additional genomic evidence from historic wolf specimens could change that assessment, says Evaluating the Taxonomic Status of the Mexican Gray Wolf and the Red Wolf, a new report from the National Academies of Sciences, Engineering, and Medicine.

Urban flooding is a complex and distinct kind of flooding, compounded by land use and high population density, and it requires a different approach to assess and manage, says Framing the Challenge of Urban Flooding in the United States, a new report from the National Academies of Sciences, Engineering, and Medicine.

The lack of supportive policies for families in the United States, such as paid parental leave, has serious implications for health equity, as it affects families’ overall health and financial stability, says a new report from the National Academies of Sciences, Engineering, and Medicine.

The Gulf Research Program (GRP) of the National Academies of Sciences, Engineering, and Medicine today announced $2 million in grant awards for seven new projects through its Understanding Gulf Ocean Systems (UGOS) Grants 2 competition.

"Sailor Moon" cosplayers at Anime Revloution 2014 in Vancouver, Canada.; Credit: GoToVan/Flickr Creative Commons

Japanese animation — anime — offers very different visions from its American counterparts, and it's extremely popular with college and high school students. They can be extremely difficult for well-meaning parents, uncles and aunts to shop for, so here, in no particular order, are some titles that can transform an adult’s image from clueless doofus to knowing friend. Plus, we have a few suggestions for younger children (who can also be a pain to shop for).

Cardcaptor Sakura: Complete Collection
NIS America: $249.99; 9 discs, Blu-ray, plus book
When cheerful fourth-grader Sakura Kinamoto opens an odd book in her father's study, strange lights fly out. Kerberos, who looks like a plushie of the lion on the book's cover, explains that she's inadvertently released a deck of magical cards. Despite her protests that’s she just an ordinary little girl, Kero insists Sakura must become a Cardcaptor and retrieve them before they work mischief on the world. Many American series talk about empowering girls — in this one, the viewer sees Sakura grow stronger and more confident as she learns to master the magical cards.

Cowboy Bebop: The Complete Series
Funimation: $59.98; Blu-ray, 4 discs
The sci-fi action series "Cowboy Bebop" redefined cool in animation when it debuted in 1998. Twenty-first-century bounty hunter Spike Spiegel is an anti-hero in the tradition of '40s film noir detectives. Spike is a tough guy; a crack shot, an ace pilot and a skilled martial artist. But his cynical exterior conceals a never-healed wound left by the woman he loved and lost. Seventeen years later, "Cowboy Bebop" is so popular that two special editions of the series for holiday gifting have already sold out (!). But it’s available on DVD and Blu-ray.

Dragon Ball Z: Battle of the Gods
Funimation: $34.98; DVD/Blu-ray combo pack; 3 discs
The first new "Dragon Ball Z" animation in 17 years, "Battle of the Gods" (2013) proved how popular the franchise still is, selling over 1 million tickets in just six days in Japan. The filmmakers keep the animation flat, limited and hand-drawn, so "Battle of the Gods" looks like the classic TV series and delivers the mixture of slapstick, friendship and over-the-top battles Dragon Ball fans remember and want to see again — especially guys in their 20s who grew up watching it.

Naruto Shippuden: Road to Ninja: The Movie 6
VIZ: $29.99 DVD/Blu-ray combo; 2 discs
The title hero of the long-running "Naruto" and "Naruto Shippuden" series is a come-from-behind hero whose world centers on magical ninja techniques, outrageous fights, slapstick, friendship and ramen. "The Road to Ninja" incorporates these well-loved elements, but stresses the lonely, compelling side of the title character. Audiences would quickly weary of Naruto if he were just a knuckleheaded prankster. His dedication to overcoming his weaknesses and achieving his goals makes him heroic, as well as comic — and one of the most popular animated characters of the new millennium.

(A scene from "Ranma 1/2," an anime series about a 16-year-old boy who's transformed into a girl whenever he's splashed with water.)

Ranma 1/2: Sets 1, 2, 3 & 4
VIZ: $54.97 each, Blu-ray; $44.82, DVD: 3 discs
Because he once fell into a cursed spring, black-haired high school martial artist Ranma Saotome turns into a buxom, red-haired girl when he’s hit with cold water. (Hot water restores his proper gender.) Ranma and his father Genma are freeloaders in the home of Suon Tendo. To ensure the continuation of the family dojo, the fathers have decided that the loutish Ranma and Suon’s hot-tempered daughter Akane are engaged. "Ranma 1/2"  supplies the slapstick insanity animation can provide in abundance. The filmmakers carefully sneak in just enough grudging affection between Ranma and Akane to keep the series from feeling mean-spirited.

Pokémon: Indigo League (Season 1): Complete Collection
VIZ: $54.98  9 discs          
"Pokémon" is no longer the trend du jour it was 20 years ago, when it swept America. But the games and the animated series remain popular. Although it's product-based and sometimes cloying, "Pokémon" is an agreeable show for elementary school children that stresses friendship, perseverance, fair play and good sportsmanship. These early adventures take the main characters through the first part of the game in its original Red/Blue versions. With his friends Misty and Brock, aspiring master Pokémon trainer Ash Ketchum defeats other trainers, captures wild Pokémon and outwits the inept comic villains of Team Rocket.

Princess Nine Complete Series
Bayview Entertainment: $39.99 DVD
Ryo Hayakawa inherited her late father’s talent as a pitcher, but she works as a waitress in her mother’s tiny cafe. Determined to overcome sexist opposition and create a girls’ baseball team that can compete in the national championships, Ms. Himuro, the head of prestigious Kisaragi High, gives Ryo a scholarship. She must recruit players and build an effective team. Ryo is a very likable character — she’s proud of her abilities, but surprised at where they take her. "Princess Nine" ranks among the better girls’ series of recent years, with characters who are strong, capable individuals but who exhibit human weaknesses.

Short Peace
Sentai Filmworks: $29.98 Blu-ray
For "Short Peace," Katsuhiro Otomo ("Akira") and three other directors made short films in personal styles they felt suited the stories they’d chosen, two of them evoking the look of 19th century woodblock prints. In Shuhei Morita’s Oscar-nominated "Possessions," a wandering tinkerer seeks refuge from a storm in a remote forest shrine. Inside, he  must pacify umbrellas, bowls and other household objects that resent being thrown away after years of devoted service. Otomo’s "Combustible" focuses on childhood sweethearts Owaka and Matsukichi, the son and daughter of wealthy merchants in 18th century Edo (Tokyo). The climactic blaze that brings the star-crossed lovers together — only to separate them forever — is stunningly beautiful.

(Oscar-winning Japanese animator and film director Hayao Miyazaki walks past an advertisement following the release of his film "Ponyo.")

No figure in contemporary animation is more admired than Hayao Miyazaki. Walt Disney Home Entertainment has just released to DVD/Blu-ray 2-disc sets of three of his major films at $26.95 each:

Kiki's Delivery Service
A charming coming-of-age story, "Kiki's Delivery Service" (1989) follows the very human ups and downs of an adolescent witch who must leave her family for a new city where she’ll discover her special talent. Kiki copes believably with tight budgets, self-doubt and the awkward attentions of a flight-obsessed boy. The late comedian Phil Hartman gave his final performance as Gigi, the sardonic black cat who provides a running commentary on Kiki's misadventures.

Princess Mononoke
The ecologically-themed "Princess Mononoke" (1999) was the first of Miyazaki’s features to receive a major theatrical release in the U.S. The problems posed by rampant development and consumerism figure prominently in the film. “If you want to discuss any aspect of the problems we face as humans, you cannot ignore ecology,'' he said. Miyazaki juxtaposes visually and emotionally intense scenes of the characters, with quiet images of clouds, streams and forests. When rain begins to fall, he lingers on a stone that darkens as it absorbs moisture.

(A screenshot from Japanese director and animator Hayao Miyazaki's "Princess Mononoke.")

The Wind Rises
In "The Wind Rises" (2013), Miyazaki carries the viewer through rapturously beautiful fantasies, hard-won pleasures and poignant sorrows in this biopic of Jiro Horikoshi, who designed the A6M Zero Fighter for Mitsubishi during World War II. "The Wind Rises" isn’t focused on speed — Miyazaki concentrates on the magic of flight. Instead of launching the viewers on a CG rollercoaster ride, he enables them to savor the magic of escaping gravity in a way that approaches visual poetry. "The Wind Rises" may be Miyazaki’s last feature, but the director is still clearly at the height of his powers; although premature, it’s a glorious exit.

Death Note: The Complete Series

Light Yagami, the hero of the dark fantasy-adventure "Death Note" (2006) is brilliant, alienated— and murderous. He found the Death Note: the notebook of a Shinigami (god of death). If anyone writes the name of a human in the book, that person dies within minutes. Light launches a vigilante campaign to rid the world of criminals and create his vision of a perfect society. But the unexplained string of deaths attracts the attention of the police, who turn the case over to the secretive master crime solver known only as L. Although it begins slowly, "Death Note" gets better with each installment, as the stakes grow higher in the macabre duel of wits between Light and L.

This content is from Southern California Public Radio. View the original story at SCPR.org.

; Credit: Illustration: Dan Carino

Read the full article at LAist

; Credit: /Hanna Barczyk for NPR

What will happen on college campuses in the fall? It's a big question for families, students and the schools themselves.

A lot of what happens depends on factors outside the control of individual schools: Will there be more testing? Contact tracing? Enough physical space for distancing? Will the coronavirus have a second wave? Will any given state allow campuses to reopen?

For all of these questions, it's really too early to know the answers. But one thing is clear: Life, and learning for the nation's 20 million students in higher education, will be different.

"I don't think there's any scenario under which it's business as usual on American college campuses in the fall," says Nicholas Christakis, a sociologist and physician at Yale University.

So why are so many colleges announcing they will be back on campus in the fall?

In many cases, it's because they're still trying to woo students. A survey of college presidents found their most pressing concern right now is summer and fall enrollment. Even elite schools, typically more stable when it comes to enrollment, have reportedly been tapping their waitlists.

In the midst of all this uncertainty, it's worth looking at some of the ideas out there. With the help of Joshua Kim and Edward J. Maloney, professors and authors of the book Learning Innovation and the Future of Higher Education, here are some potential scenarios for reopening colleges and universities:

All virtual

Perhaps the most obvious option for the fall is to continue doing what they've been doing this spring. Colleges have signaled that they're planning for this option — even if it's a last resort. California State University, Fullerton, was one of the first to announce publicly it was planning for a fall semester online.

"Obviously we want to resume in-person teaching as soon as possible, but we also need to make sure that we're safe," says Ellen Treanor, who helps lead strategic communication at the school. Treanor says it made a lot of sense to assume the school would start online. "What would be the easier way to transition? It would be easier to transition beginning virtually and then transitioning in person," she said. "The faculty [needs] to be prepared."

With virtual classes, students can remain at home, although some colleges are exploring bringing them back to campus, where they could use the school's Wi-Fi to take online classes.

Delayed start

A delay in the semester would allow a school to wait it out until it was safer to reopen. One option is to push back a month or two, starting in October or November. Another idea is to push a normal start to January. In that case, the spring semester would become the fall semester, and potentially students could stay on campus through next summer to make up the spring semester. Boston University floated a version of this January start date when it announced a number of plans it was exploring.

One downside to a late start is what students will do in the meantime, especially those who don't have financial stability and rely on campus or the university to be a safe and stable home.

Some online, some face-to-face

This would be a hybrid model, with a combination of virtual and in-person classes. It may be a good choice for campuses that don't have enough classrooms to allow adjusting face-to-face teaching to the requirements of social distancing.

"You might have some of the larger classes being taught online simply because it's harder to imagine a 150- or 350-person classroom," says Maloney, who leads the Center for New Designs in Learning and Scholarship at Georgetown University. "So you might see that class split up into multiple sections." For large, entry-level classes, colleges may have a lecture component online and then meet in smaller groups in person.

"The hybrid model doesn't have to just be about modality," Maloney says. "It can be, but it could also be about fundamentally rethinking what the core structure has been for those large classes."

Of course, shifting larger classes online may not be enough, by itself, to alleviate the health concerns of having students on campus. Early research from Cornell University found that eliminating such classes didn't lessen student interactions with each other.

Shortened blocks

In block scheduling, students take just one course at a time for a shorter duration, typically three or four weeks. Colorado College, a liberal arts school south of Denver, has been using this model for 50 years. The college adopted this style of classes because "it allows [students] to take a deep dive and really focus in unique ways on the single subject," says Alan Townsend, the provost there. In a typical year, the school offers eight blocks.

In addition to its intensity, block scheduling is attractive right now because it allows flexibility. Colleges that use it have the opportunity to change the way classes look every three weeks — since there are multiple start and stop points. (With a semester, you have only a single start and then, often 16 weeks later, an end.)

"It's easier for us to now think creatively for next year," Townsend says. "Different students can make different choices. That's really hard to do with a semester-based system, but the blocks allow us to do that a little bit more flexibly."

The school is also entertaining the idea of sending faculty abroad to teach a block for international students who might not be able to enter the U.S, or adding summer blocks to give students even more opportunities to take classes.

Only some on campus

Some colleges have suggested bringing only freshmen back to campus and having upperclassmen either delay their start, or be online and remote.

The idea centers on research that shows just how important a student's first year of college is as a predictor of graduation. Adapting to campus can be a challenge, so this would allow first-year students to get comfortable and have extra support on campus.

Since upperclassmen are already familiar with how campus and classes work, the theory goes, they can more easily adapt to an online environment. Other versions of this approach would have students who have housing needs come back to campus first, and then, over time, phase in other groups of students.

All these options seek to keep the population density of the campus lower while still maintaining some face-to-face interactions.

On campus, with some changes

Social distancing, improved testing and contact tracing could help colleges reopen their campuses.

"Every school is trying to figure out a way to have students come back and do whatever we can while also protecting public health," says Learning Innovation co-author Joshua Kim, director of online programs and strategy at Dartmouth College.

"At the same time, we know that, however that works, things will be different. It's probably unlikely that we'll be able to cram students together in large, packed lecture halls or put doubles and triples in residence halls or have big events."

To follow social distancing, professors are measuring their classrooms, calculating how many students could fit in the space if they were 6 feet apart. Deans are planning out how students could enter and exit the classrooms safely.

But it's not just the classrooms that pose a challenge. For residential colleges, it's the dorms.

"Whether or not students are actually learning in the classroom, it's incredibly important for them to have an on-campus experience," Maloney says. So schools are thinking about how they can spread their students out, putting them in places where they normally wouldn't go.

Some ideas include housing students in offices that aren't being used, local hotel rooms or off-campus housing. Institutions are also reimagining campus events, like freshman orientation, since it's unlikely hundreds of students will be in a packed auditorium.

"Rethinking how we do everything we do at a university is part of the process," Maloney says.

This content is from Southern California Public Radio. View the original story at SCPR.org.

A new class of drugs called HIF-2 inhibitors is more effective and better tolerated than the standard of care drug sunitinib in treating kidney cancer, researchers with the Kidney Cancer Program at Harold C. Simmons Comprehensive Cancer Center have found.

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A recent report has summarised what is currently known about the effects of ocean fertilisation as a climate change mitigation measure. The report highlights gaps in scientific understanding of the long term-effects of large-scale ocean fertilisation activities and raises questions about the effectiveness of the approach and the possibility of unintended impacts.

A recent study has assessed the sustainability of different nuclear cycle scenarios in Europe, and suggests trade-offs are required between reducing the amount of uranium fuel needed, costs and proliferation risks.

Agricultural intensification can significantly affect soil ecosystems and the services they provide, new research suggests. Examining soils across Europe, the study demonstrates that high intensity arable land uses have lower diversity and biomass of soil organisms than lower intensity arable or permanent grassland, affecting the carbon and nitrogen cycles in the environment.

Sustainable management of phosphorus requires better information on how it flows through the environment via consumption and waste. New research from Sweden has found that 40% of phosphorus released by Gothenburg to the environment is in sewage sludge and a further 40% is in incineration ash. This suggests that phosphorus could be recycled from solid waste as well as from wastewater.

The laid off employees in the United States will get 14 weeks of base pay plus one additional week for every year at Airbnb

A new study has found evidence for lung toxicity of different forms of ‘cellulose nanocrystals’ (CNCs) in mice. The study suggests that physical characteristics, such as length, of the CNC relates to the type of effect it has on the lung. These nanosized crystals, made from plant-derived materials, are increasingly being used in novel applications, such as cleaning up oil spills in water and flexible electronic displays, and consumer products, which raises concerns about their potential health impacts.

Two papers published by an assistant professor at the University of California, Riverside and several collaborators explain why the universe has enough energy to become transparent.

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Parents who excel at math produce children who excel at math. This is according to a recently released University of Pittsburgh study, which shows a distinct transfer of math skills from parent to child. The study specifically explored intergenerational transmission--the concept of parental influence on an offspring's behavior or psychology--in mathematic capabilities.

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The transition to a low-carbon transport system needs a coherent national policy framework that supports all its aspects, according to a review of transport and innovation policy in Finland. Its findings suggest that policy makers need to identify and remove contradictory policies that present barriers to achieving a greener transport system.

Progress towards achieving a sustainable urban environment may be measured by sustainability indicators (SIs), which can be chosen to represent values that are important to local communities. A recent study has assessed a set of SIs developed by both sustainability experts and local citizens and suggests that local communities can attach different values to SIs to reflect local values and understandings of sustainability.

Environmental changes in the future, such as an increase in floods, land degradation and drought could result in changes in migration patterns in Europe, researchers write in a recent analysis. It is difficult to predict these exact migration patterns, however, as they are determined by a complex interplay of economic, political and social factors with environmental change, as well as adaptive capacity.

Carbon footprints are an established means of communicating one aspect of a product's environmental impact. New research suggests additional 'nitrogen footprints' for food products could give consumers a more informed choice and help reduce eutrophication in water. However, it warns that there are environmental trade-offs for some food groups, for example, oil products have a small nitrogen footprint, but a fairly large carbon footprint.

Sustainable management of phosphorus requires better information on how it flows through the environment via consumption and waste. New research from Sweden has found that 40% of phosphorus released by Gothenburg to the environment is in sewage sludge and a further 40% is in incineration ash. This suggests that phosphorus could be recycled from solid waste as well as from wastewater.

Past economic activity is more likely to explain the current pattern of biological invasions across Europe than recent human activities, according to a new study. It can take several decades before a newly introduced species becomes established and spreads, which may mean that recent invasions caused by current economic activities could create an 'invasion debt' for future generations.

Conservation policy needs to take account of diverse cultural views about the value of different species, according to the results of a new study. Widely differing views of the relative importance of marine species ??? from algae to mammals ??? emerged when the researchers surveyed people across Europe.

The Natura 2000 network is the backbone of nature conservation in the EU, and agri-environment schemes (AES) are an important tool to protect biodiversity on European farmland. A recent study, which investigated the effectiveness of AES in relation to grassland birds in Poland, found that AES were not associated with species richness of target species, and proposed a number of reasons for this. The researchers recommend that AES management regimes should be diversified and customised to provide optimal habitat for a wider range of bird species.

The world's first full-scale artificial wetland designed to treat both sewage effluent and mine wastewater has been found to continuously remove high levels of pollutants, a recent study concludes. Treating both types of wastewater at the same time proved to be highly beneficial because they contain pollutants which are more easily removed when mixed together.