The crystal structures of caesium di­hydrogen arsenate(V) bis­[tri­hydrogen arsen­ate(V)], Cs(H2AsO4)(H3AsO4)2, ammonium di­hydrogen arsenate(V) tri­hydrogen arsenate(V), NH4(H2AsO4)(H3AsO4), and dilithium bis­(di­hydrogen phosphate), Li2(H2PO4)2, were solved from single-crystal X-ray diffraction data. NH4(H2AsO4)(H3AsO4), which was hydro­thermally synthesized (T = 493 K), is homeotypic with Rb(H2AsO4)(H3AsO4), while Cs(H2AsO4)(H3AsO4)2 crystallizes in a novel structure type and Li2(H2PO4)2 represents a new polymorph of this composition. The Cs and Li compounds grew at room temperature from highly acidic aqueous solutions. Li2(H2PO4)2 forms a three-dimensional (3D) framework of PO4 tetra­hedra sharing corners with Li2O6 dimers built of edge-sharing LiO4 groups, which is reinforced by hydrogen bonds. The two arsenate compounds are characterized by a 3D network of AsO4 groups that are connected solely via multiple strong hydrogen bonds. A statistical evaluation of the As—O bond lengths in singly, doubly and triply protonated AsO4 groups gave average values of 1.70 (2) Å for 199 As—OH bonds, 1.728 (19) Å for As—OH bonds in HAsO4 groups, 1.714 (12) Å for As—OH bonds in H2AsO4 groups and 1.694 (16) Å for As—OH bonds in H3AsO4 groups, and a grand mean value of 1.667 (18) Å for As—O bonds to nonprotonated O atoms.

In this file photo, students warm up in a mariachi class at Hamilton High School.; Credit: Susanica Tam for KPCC

Los Angeles Unified's arts education leaders took steps to renew long-dormant community partnerships with arts organizations Wednesday, part of an effort to revitalize arts education in the nation’s second largest school district. 

At the Los Angeles Cathedral in downtown L.A., the district's new arts ed director, Rory Pullens, held his first meeting with community arts organizations. More than 100 people representing several dozen groups attended the event.

Pullens outlined the district's arts plans and how community partners can help boost the arts for students.

“Guess what," Pullens said, getting a round of applause with cheers of support from some of the attendees. "We're back." 

RELATED: LAUSD decision ushers in new source of funding for arts education

Pullens lauded the district's recent announcement clearing the way for arts funding for low-income students, and pointed to new allocations this year that helped some of the district's schools purchase items like art supplies.

He also said the district is working on a school survey to create an arts equity index that will change the way the district allocates arts funds. The index would measure how well schools are providing arts instruction and arts access to students. Originally planned for release last year, the index is now expected next month.

But Pullens also painted a grim picture of the district’s current arts offerings. He said about a third of the district's middle schools currently offer little or no exposure to the arts. Some of the district’s students can go through both elementary and middle school without taking a single arts class, he said. Because of gaps in arts instruction, students who start learning an instrument in elementary school, for example, might not have classes to continue music study in their middle or high schools.

Pullens further talked about widespread budget problems, but took district leaders to task for failing to restore arts funding to the budget as the recession eased.

He said the arts education branch is still facing a deficit. Superintendent Ramon Cortines told reporters recently that the district as a whole is looking at a $160 million shortfall heading into the 2015-2016 school  year.

Despite the mixed funding news, for many in attendance, the meeting marked a positive shift in the district's arts strategy. Some groups currently serve as partners with the district, but the gathering was the first major effort in several years to reach out to organizations with the aim of restoring arts in the schools.

Jay McAdams, the executive director of 24th Street Theatre, said he remembered a few years back when the district emailed a cease-and-desist letter calling for an end to all arts partnership programs. He saw Wednesday's meeting as a major turnaround. 

"This is just a real breath of fresh air. There’s hope, there’s hope for first time in a long time for arts," he said. 

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

On average, Americans die sooner and experience higher rates of disease and injury than people in other high-income countries, says a new report from the National Research Council and Institute of Medicine.

File: Western monarch butterfly in Huntington Beach; Credit: Courtesy of Huntington Beach Tree Society

A group of conservation organizations teamed up with a leading monarch butterfly scientist on Tuesday to petition for protection of the monarch butterfly under the Endangered Species Act.

The monarch butterfly is one of the most iconic butterfly species in the country. But according to conservation group the Xerces Society, the monarch butterfly population is in trouble.

“Many scientists estimate that there are about 33 million monarchs. And just for comparison, in the past, researchers have estimated more than 1 billion monarchs,” said Sarina Jepsen, who directs the Endangered Species Program for the Xerces Society.

That’s a decline of about 90 percent in just fewer than 20 years, Jepsen said.

The main culprit in the monarch’s decline is the weed killer Roundup, Jepsen said. Most monarch caterpillars breed in the Midwest, and feed off of milkweed. While Roundup doesn’t kill genetically modified crops like soy and corn, it does kill milkweed.

“So, milkweed growing in a large agricultural landscape has largely disappeared in the last decade-and-a-half to two decades,” said Jepsen.

Other contributing factors include climate change and a general loss of habitat, Jepsen said. California’s drought might also play a role.

“There’s a real strong relationship between drought severity and the number of monarchs that we see in the winter on the California coast,” said Jepsen. “In years when droughts are worse, there are fewer monarchs.”

Thousands of the butterflies gather on California’s coast each winter. Spots locally includeLeo Carrillo Beach in Malibu and Doheny Beach in Dana Point, though the Xerces Society has observed a large decline in the butterflies at these locations in the last several decades.

More on the drought’s effect on the monarch population will be known around Thanksgiving, when a group of so-called "citizen scientists" with the Xerces Society perform an annual count of the monarchs.

Along with the Xerces Society, the Center for Biological Diversity, the Center for Food and Safety and leading monarch butterfly scientist Dr. Lincoln Brower filed the petition.

The Fish and Wildlife Service has 90 days to decide whether to go forward with a further review to potentially classify the monarch butterfly as threatened or endangered. 

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

Regulators should establish a process to consider the full lifecycle greenhouse gas (GHG) emissions of electric vehicles, according to a new US study. This would help ensure that vehicle emissions regulations are placed on a sound scientific basis, manufacturers continue to improve the efficiency of electric vehicles, and the full benefit of regulations to limit GHG emissions from vehicles are realised, say the researchers.

The makers of Fevicol are leveraging this time to retrain staff and gear up technology infrastructure for the post-Covid world.

A team of Carnegie scientists has discovered three giant planets in a binary star system composed of stellar ''twins'' that are also effectively siblings of our Sun. One star hosts two planets and the other hosts the third. The system represents the smallest-separation binary in which both stars host planets that has ever been observed. The findings, which may help explain the influence that giant planets like Jupiter have over a solar system's architecture, have been accepted for publication in The Astronomical Journal.

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The makers of Fevicol are leveraging this time to retrain staff and gear up technology infrastructure for the post-Covid world.

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.

The tax also applies to advertising revenue earned from companies overseas if those advertisements eventually target customers in India. Google is particularly concerned that it would not be able to swiftly identify countries where such advertising arrangements were in place, Reuters has reported.

Initial batches have been supplied in Chennai, while some were in the process of being scaled up towards mass production for use in hospitals and clinics across the country.

The company on Wednesday announced systems integration (SI) capabilities including consulting, agile devOps, cloud migration, cloud capacity optimization and the Future Mode of Operation aimed at taking the communications industry to the cloud at an accelerated pace.

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