A method is described for indexing grazing-incidence X-ray diffraction data of epitaxially grown thin films comprising various crystal orientations and/or polymorphs by measuring reciprocal-lattice vectors.

A method is adapted to generate a full rank realization of an abstract regular polyhedron with automorphism group H3.

The analytical solution of the problem of X-ray spherical-wave Laue diffraction in a single crystal with a linear change of thickness on the exit surface is derived. General equations are applied to a specific case of plane-wave Laue diffraction in a thick crystal under the conditions of the Borrmann effect.

(The Paypers) The Dutch fintech startup Safened will be rebranded as

UTLA says it is at an impasse with the Los Angeles Unified School District over a new contract for its 31,000 teachers. ; Credit: File photo by Letsdance Tonightaway/Flickr Creative Commons

The United Teachers Los Angeles declared an impasse Wednesday in its talks with the Los Angeles Unified School District.

The action opens the way for a mediator to be brought in to help bring about a settlement.

Contract talks have been ongoing since July, UTLA said on its website.

"There is still a significant gap between the two sides on compensation," the union stated. UTLA is seeking an 8.5 percent, one-year increase; LAUSD has offered a 5 percent increase. 

The union said the district is "refusing to bargain in good faith on student learning conditions, and threatening educator layoffs as a scare tactic."

LAUSD Superintendent Ramon Cortines said in a statement that the district agrees the talks are at an impasse.

"I've been disappointed and frustrated by the lack of progress toward an agreement," he said. "It's my hope that the appointment of a mediator will lead to an expeditious settlement that ultimately supports our students and the District at large."

UTLA represents 31,000 members, including teachers and health and human service professionals.

The differences between the two sides amount to more than $800 million, the district said in its statement. Cortines has maintained that the district is facing a deficit. The union insists the district has money.

Other issues dividing the two sides include class room size and teacher evaluations.

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

Christopher R. Mahone
Apr 8, 2020; 133:jcs237057-jcs237057
CELL SCIENCE AT A GLANCE

Su Ming Sun
Apr 16, 2020; 0:jcs.237628v1-jcs.237628
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Norbert Volkmar
Apr 24, 2020; 133:jcs243519-jcs243519
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The molecular mechanism used by many bacteria to kill neighboring cells has redundancy built into its genetic makeup, which could allow for the mechanism to be expressed in different environments, say researchers at Penn State and the University of Wisconsin-Madison. Their new study provides insights into the molecular mechanisms of competition among bacteria. "Many organisms, including humans, acquire bacteria from their environment," said Tim Miyashiro, a biochemist and molecular biologist at Penn State and the leader of the research team. "These bacteria can contribute to functions within the host organism, like how our gut bacteria help us digest food. We're interested in the interactions among bacteria cells, and between bacteria and their hosts, to better understand these mutually beneficial symbiotic relationships." Cells of the bioluminescent bacteria Vibrio fisheri take up residence in the light organ of newly hatched bobtail squid. At night, the bacteria produce a blue glow that researchers believe obscures a squid's silhouette and helps protect it from predators. The light organ has pockets, or crypts, in the squid's skin that provide nutrients and a safe environment for the bacteria. "When the squid hatches, it doesn't yet have any bacteria in its light organ," said Miyashiro. "But bacteria in the environment quickly colonize the squid's light organ." Some of these different bacteria strains can coexist, but others can't. "Microbial symbioses are essentially universal in animals, and are crucial to the health and development of both partners," says Irwin Forseth, a program director in the National Science Foundation's Division of Integrative Organismal Systems, which funded the research. "The results from this study highlight the role small genetic changes can play in microbe interactions. Increased understanding will allow us to better predict organisms' performance in changing environments."

Image credit: Andrew Cecere

Source: Streetwise Reports   05/06/2020

In a May 4 research note, H.C. Wainwright & Co. analyst Ed Arce reported that Arcturus Therapeutics Holdings Inc. (ARCT:NASDAQ) formed a partnership with Catalent Inc. (CTLT:NYSE), which "raises the profile of LUNAR-COV19 as a leading vaccine candidate."

Arce reviewed Catalent's contribution to the partnership. The global contract development and manufacturing organization is to manufacture Arcturus' messenger RNA (mRNA) LUNAR-COV19 for protection against SARS-CoV-2 to be used first for human clinical trials and potentially, eventually commercially.

As for timing, Arce noted, San Diego, Calif.-based Arcturus intends to transfer its vaccine technology to Catalent this month and expects Catalent to manufacture the first batches of LUNAR-COV19 by June 2020. "Critically, Arcturus continues to anticipate initiation of Phase 1 testing of LUNAR-COV19 in the summer of 2020," Arce highlighted.

Catalent is to produce the vaccine at its biomanufacturing facility in Madison, Wisc. "This facility utilizes Catalent's flex-suite, a current good manufacturing practice manufacturing suite, that can produce batches at multiple scales and support Arcturus' proprietary mRNA manufacturing process," explained Arce.

Obtaining the vaccine from one facility domestically versus multiple entities worldwide should result in several benefits, Arce continued. They include easy development and production, accelerated delivery and improved costs. Arcturus believes Catalent can produce millions of doses of LUNAR-COV19 mRNA in 2020 and, if need be, hundreds of millions of doses each year subsequently for use globally.

Arce pointed out that LUNAR-COV19 differentiates itself from other similar vaccine candidates in that the technology and delivery platform behind it deliver an "extraordinarily low dose (perhaps 2 micrograms)" in "a potential single shot."

H.C. Wainwright has a Buy rating and a $62 per share price target on Arcturus, the stock of which is currently trading at about $42.12 per share.

Disclosure:
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Disclosures from H.C. Wainwright & Co., Arcturus Therapeutics Holdings Inc., First Take, May 4, 2020

Investment Banking Services include, but are not limited to, acting as a manager/co-manager in the underwriting or placement of securities, acting as financial advisor, and/or providing corporate finance or capital markets-related services to a company or one of its affiliates or subsidiaries within the past 12 months.

I, Ed Arce, certify that 1) all of the views expressed in this report accurately reflect my personal views about any and all subject securities or issuers discussed; and 2) no part of my compensation was, is, or will be directly or indirectly related to the specific recommendation or views expressed in this research report; and 3) neither myself nor any members of my household is an officer, director or advisory board member of these companies.

None of the research analysts or the research analyst's household has a financial interest in the securities of Arcturus Therapeutics Holdings Inc. (including, without limitation, any option, right, warrant, future, long or short position).

As of April 30, 2020 neither the Firm nor its affiliates beneficially own 1% or more of any class of common equity securities of Arcturus Therapeutics Holdings Inc.

Neither the research analyst nor the Firm has any material conflict of interest in of which the research analyst knows or has reason to know at the time of publication of this research report.

The research analyst principally responsible for preparation of the report does not receive compensation that is based upon any specific investment banking services or transaction but is compensated based on factors including total revenue and profitability of the Firm, a substantial portion of which is derived from investment banking services.

The firm or its affiliates received compensation from Arcturus Therapeutics Holdings Inc. for non-investment banking services in the previous 12 months.

The Firm or its affiliates did receive compensation from Arcturus Therapeutics Holdings Inc. for investment banking services within twelve months before, and will seek compensation from the companies mentioned in this report for investment banking services within three months following publication of the research report.

H.C. Wainwright & Co., LLC managed or co-managed a public offering of securities for Arcturus Therapeutics Holdings Inc. during the past 12 months.

The Firm does not make a market in Arcturus Therapeutics Holdings Inc. as of the date of this research report.

H.C. Wainwright & Co., LLC and its affiliates, officers, directors, and employees, excluding its analysts, will from time to time have long or short positions in, act as principal in, and buy or sell, the securities or derivatives (including options and warrants) thereof of covered companies referred to in this research report.

( Companies Mentioned: ARCT:NASDAQ, )

Although there is evidence of harmful health and ecological effects associated with exposure to high doses of chemicals known as hormonally active agents – or endocrine disrupters – little is understood about the harm posed by exposure to the substances at low concentrations, such as those that typically exist in the environment, says a new report from a National Research Council committee.

To meet the bodys daily energy and nutritional needs while minimizing risk for chronic disease, adults should get 45 percent to 65 percent of their calories from carbohydrates, 20 percent to 35 percent from fat, and 10 percent to 35 percent from protein.

Government authorities in the United States and Canada should use the current Dietary Reference Intakes (DRIs) to update nutrition information on food and dietary supplement labels so that consumers can compare products more easily and make informed food choices based on the latest science, says a new report from the Institute of Medicine of the National Academies.

The U.S. Environmental Protection Agencys standard for the maximum amount of fluoride allowed in drinking water -- 4 milligrams of fluoride per liter of water -- does not protect against adverse health effects.

While every mode of transportation in the U.S. will be affected as the climate changes, potentially the greatest impact on transportation systems will be flooding of roads, railways, transit systems, and airport runways in coastal areas because of rising sea levels and surges brought on by more intense storms, says a new report from the National Research Council.

Hydraulic fracturing has a low risk for inducing earthquakes that can be felt by people, but underground injection of wastewater produced by hydraulic fracturing and other energy technologies has a higher risk of causing such earthquakes, says a new report from the National Research Council.

A new report from the National Research Council recommends best practices that law enforcement agencies and courts should follow to improve the likelihood that eyewitness identifications used in criminal cases will be accurate.

Efforts to convert civilian research reactors from weapon-grade highly enriched uranium (HEU) to low enriched uranium (LEU) fuels are taking significantly longer than anticipated, says a congressionally mandated report from the National Academies of Sciences, Engineering, and Medicine.

A new report from the National Academies of Sciences, Engineering, and Medicine identifies six promising practices to improve health care for individuals with social risk factors for poor health care outcomes, such as people who are in a low socio-economic position, reside in disadvantaged neighborhoods, identify as a racial or ethnic minority, or possess limited health literacy.

Bullying is a serious public health problem, with significant short- and long-term psychological consequences for both the targets and perpetrators of such behavior, and requires a commitment to developing preventive and interventional policies and practices that could make a tangible difference in the lives of many children, says a new report from the National Academies of Sciences, Engineering, and Medicine.

To transform the offshore oil and gas industry’s safety culture, operators, contractors, subcontractors, associations representing these groups, and federal regulators should collaborate to foster safety throughout all levels of the industry and confront challenges collectively, 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 urges Congress, federal and state agencies, and regulatory institutions to significantly increase their support for innovation for what the report’s study committee calls “increasingly clean” electric power technologies – nuclear power, carbon capture and storage, and renewables such as solar and wind. Some of these technologies have seen recent cost and price declines and are cost-competitive in certain locations.

Rising levels of noise in the ocean have been identified as a growing concern for the well-being of marine mammals, but other threats such as pollution, climate change, and prey depletion by fisheries may also harm marine mammals and influence their response to additional noise.

In response to alarming evidence of high rates of depression and suicide among U.S. health care workers, the National Academy of Medicine is launching a wide-ranging “action collaborative” of multiple organizations to promote clinician well-being and resilience.

Several strong earthquakes around the world have resulted in a phenomenon called soil liquefaction, the seismic generation of excess porewater pressures and softening of granular soils, often to the point that they may not be able to support the foundations of buildings and other infrastructure.

The call for expanding undergraduates’ access to research experiences in science, technology, engineering, and mathematics (STEM) raises questions about their use and potential to increase students’ interest and persistence in these disciplines.

Federal agencies or other organizations responsible for sponsoring research or collecting data on technology and the workforce should establish a multidisciplinary research program that addresses unanswered questions related to the impact of changing technology on the nature of work and U.S. national economy, says a new report by the National Academies of Sciences, Engineering, and Medicine.

All stakeholders in the scientific research enterprise -- researchers, institutions, publishers, funders, scientific societies, and federal agencies – should improve their practices and policies to respond to threats to the integrity of research, 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 identifies global health priorities in light of current and emerging challenges and makes 14 recommendations for the U.S. government and other stakeholders to address these challenges, while maintaining U.S. status as a world leader in global health.

Policymakers, employers, and educational institutions should take steps to strengthen the nation’s skilled technical workforce, says a new report from the National Academies of Sciences, Engineering, and Medicine.

The academic biomedical research community should improve its ability to mitigate and recover from the impacts of disasters, says a new report from the National Academies of Sciences, Engineering, and Medicine.

U.S. colleges and universities should respond with urgency to the current surge in undergraduate enrollments in computer science courses and degree programs, which is straining resources at many institutions, says a new report from the National Academies of Sciences, Engineering, and Medicine.

Our ability to observe and predict severe weather events and other disasters has improved markedly over recent decades, yet this progress does not always translate into similar advances in the systems used in such circumstances to protect lives.

A number of strategies used by the police to proactively prevent crimes have proved to be successful at crime reduction, at least in the short term, and most strategies do not harm communities’ attitudes toward police, finds a new report by the National Academies of Sciences, Engineering, and Medicine.

A new report from the National Academies of Sciences, Engineering, and Medicine examines to what extent and in which ways health care utilization -- such as in-patient hospitalizations, emergency department use, and hospital readmission -- reflects disease severity, disability, and ability to perform gainful activity.

The Gulf Research Program (GRP) of the National Academies of Sciences, Engineering, and Medicine today announced 11 grant awards totaling $341,283 to assist in the recovery of Gulf Coast scientific research efforts impacted by hurricanes Harvey and Irma.

The Gulf Research Program (GRP) of the National Academies of Sciences, Engineering, and Medicine today announced 11 grant awards totaling $287,565 to assist in the recovery of Gulf of Mexico region scientific research efforts impacted by hurricanes Harvey and Irma.

In recognition of the need for a national coordinated and collective response to the epidemic of opioid addiction in the U.S., the National Academy of Medicine (NAM), in partnership with the Aspen Institute, launched a public-private partnership made up of more than 35 organizations representing federal, state, and local governments, health systems, associations and provider groups, health education and accrediting institutions, pharmacies, payers, industry, nonprofits, and academia.