A portable IR fiber laser-heating system, optimized for X-ray emission spectroscopy (XES) and nuclear inelastic scattering (NIS) spectroscopy with signal collection through the radial opening of diamond anvil cells near 90°with respect to the incident X-ray beam, is presented. The system offers double-sided on-axis heating by a single laser source and zero attenuation of incoming X-rays other than by the high-pressure environment. A description of the system, which has been tested for pressures above 100 GPa and temperatures up to 3000 K, is given. The XES spectra of laser-heated Mg0.67Fe0.33O demonstrate the potential to map the iron spin state in the pressure–temperature range of the Earth's lower mantle, and the NIS spectra of laser-heated FeSi give access to the sound velocity of this candidate of a phase inside the Earth's core. This portable system represents one of the few bridges across the gap between laser heating and high-resolution X-ray spectroscopies with signal collection near 90°.

British Geological Survey submits application for geoenergy observatory in Cheshire  ThinkGeoEnergy

Reductive cyclization of 1,3,5-triphenyl- and 3-(2-meth­oxy­phen­yl)-1,5-di­phenyl­pentane-1,5-diones by zinc in acetic acid medium leads to the formation of 1,2,4-tri­phenyl­cyclo­pentane-1,2-diol [1,2,4-Ph3C5H5-1,2-(OH)2, C23H22O2, (I)] and 4-(2-meth­oxy­phen­yl)-1,2-di­phenyl­cyclo­pentane-1,2-diol [4-(2-MeOC6H4)-1,2-Ph2C5H5-1,2-(OH)2, C24H24O3, (II)]. Their single crystals have been obtained by crystallization from a THF/hexane solvent mixture. Diols (I) and (II) crystallize in ortho­rhom­bic (Pbca) and triclinic (Poverline{1}) space groups, respectively, at 150 K. Their asymmetric units comprise one [in the case of (I)] and three [in the case of (II)] crystallographically independent mol­ecules of the achiral (1R,2S,4r)-diol isomer. Each hydroxyl group is involved in one intra­molecular and one inter­molecular O—H⋯O hydrogen bond, forming one-dimensional chains. Compounds (I) and (II) have been used successfully as precatalyst activators for the ring-opening polymerization of ∊-caprolactone.

Electron diffraction tomography (EDT) has gained increasing interest, starting with the development of automated electron diffraction tomography (ADT) which enables the collection of three-dimensional electron diffraction data from nano-sized crystals suitable for ab initio structure analysis. A basic description of the ADT method, nowadays recognized as a reliable and established method, as well as its special features and general applicability to different transmission electron microscopes is provided. In addition, the usability of ADT for crystal structure analysis of single nano-sized crystals with and without special crystallographic features, such as twinning, modulations and disorder is demonstrated.

The room-temperature experiment has been revisited for macromolecular crystallography. Despite being limited by radiation damage, such experiments reveal structural differences depending on temperature, and it is expected that they will be able to probe structures that are physiologically alive. For such experiments, the humid-air and glue-coating (HAG) method for humidity-controlled experiments is proposed. The HAG method improves the stability of most crystals in capillary-free experiments and is applicable at both cryogenic and ambient temperatures. To expand the thermal versatility of the HAG method, a new humidifier and a protein-crystal-handling workbench have been developed. The devices provide temperatures down to 4°C and successfully maintain growth at that temperature of bovine cytochrome c oxidase crystals, which are highly sensitive to temperature variation. Hence, the humidifier and protein-crystal-handling workbench have proved useful for temperature-sensitive samples and will help reveal temperature-dependent variations in protein structures.

Rotation is a core crystallographic operation. Two sets of Cartesian coordinates of each point of a rotated object, those before and after rotation, are linearly related, and the coefficients of these linear combinations can be represented in matrix form. This 3 × 3 matrix is unique for all points and thus describes unambiguously a particular rotation. However, its nine elements are mutually dependent and are not interpretable in a straightforward way. To describe rotations by independent and comprehensible parameters, crystallographic software usually refers to Euler or to polar angles. In crystallography and cryo-electron microscopy, there exists a large choice of conventions, making direct comparison of rotation parameters difficult and sometimes confusing. The program py_convrot, written in Python, is a converter of parameters describing rotations. In particular, it deals with all possible choices of polar angles and with all kinds of Euler angles, including all choices of rotation axes and rotation directions. Using a menu, a user can build their own rotation parameterization; its action can be viewed with an interactive graphical tool, Demo. The tables in this article and the extended help pages of the program describe details of these parameterizations and the decomposition of rotation matrices into all types of parameters. The program allows orthogonalization conventions and symmetry operations to be taken into account. This makes the program and its supporting materials both an illustrative teaching material, especially for non-specialists in mathematics and computing, and a tool for practical use.

Microcrystal delivery methods are pivotal in the use of serial femtosecond crystallography (SFX) to resolve the macromolecular structures of proteins. Here, the development of a novel technique and instruments for efficiently delivering microcrystals for SFX are presented. The new method, which relies on a one-dimensional fixed-target system that includes a microcrystal container, consumes an extremely low amount of sample compared with conventional two-dimensional fixed-target techniques at ambient temperature. This novel system can deliver soluble microcrystals without highly viscous carrier media and, moreover, can be used as a microcrystal growth device for SFX. Diffraction data collection utilizing this advanced technique along with a real-time visual servo scan system has been successfully demonstrated for the structure determination of proteinase K microcrystals at 1.85 Å resolution.

A new temperature-controllable humidifier for X-ray diffraction has been developed. It is shown that the humidifier can successfully maintain protein crystal growth at a temperature lower than room temperature.

The Python-based program py_convrot is a universal converter of rigid-body rotation parameters. The program interactively illustrates the action of various rotation parameters and can be used both for teaching goals and for practical applications.

An algorithm, based on the matching of q-vectors pairs, is combined with three-dimensional pattern matching using a nearest-neighbors approach to index Laue and monochromatic serial crystallography data recorded on small unit cell samples.

A new study has revealed information about the way tungara frogs in the tropical rain forest hear, sort, and process sounds which is very similar to the way humans do. The knowledge could be applicable to communication disorders associated with hearing loss and attention deficits or difficulties.

The post Research on tungara frogs may be applicable to hearing loss/attention deficits in humans appeared first on Smithsonian Insider.

Hot spots of mercury pollution in aquatic sediments and soils can contaminate local food webs and threaten ecosystems, but cleaning them up can be expensive […]

The post Toxicity of mercury hot spots can be reduced with application of activated carbon, researchers discover appeared first on Smithsonian Insider.

As the male túngara frog serenades female frogs from a pond, he creates watery ripples that make him easier to target by rivals and predators […]

The post Bats use water ripples to hunt frogs appeared first on Smithsonian Insider.

A new aspherical scattering factor formalism has been implemented in the crystallographic least-squares refinement program SHELXL. The formalism relies on Gaussian functions and can optionally complement the independent atom model to take into account the deformation of electron-density distribution due to chemical bonding and lone pairs. Asphericity contributions were derived from the electron density obtained from quantum-chemical density functional theory computations of suitable model compounds that contain particular chemical environments, as defined by the invariom formalism. Thanks to a new algorithm, invariom assignment for refinement in SHELXL is automated. A suitable parameterization for each chemical environment within the new model was achieved by metaheuristics. Figures of merit, precision and accuracy of crystallographic least-squares refinements improve significantly upon using the new model.

UK-based banks have received around 100,000 applications in a single day after The Bounce Back Loans scheme for small businesses was released.

Outdated food safety laws and a fragmented federal structure serve as barriers to improving protection of the nations food supply from contamination or other hazards, according to Ensuring Safe Food From Production to Consumption.

The U.S. Agency for International Development should speed its transformation into a global leader and catalyst in applying science, technology and innovation to the challenges facing developing countries, says a new report from the National Academies of Sciences, Engineering, and Medicine.

In a letter to the U.S. Department of State, the presidents of the National Academy of Sciences, National Academy of Engineering, and National Academy of Medicine expressed concern that a proposal to add supplemental questions for visa applicants.

Over the next several decades as the global population grows, society will be faced with pressing challenges such as providing reliable supplies of food and water, diminishing climate change and adapting to its impacts, and building healthy, resilient cities.

The Gulf Research Program (GRP) of the National Academies of Sciences, Engineering, and Medicine is now accepting applications for its Early-Career Research Fellowships and Science Policy Fellowships for 2019.

A new report from the National Academies of Sciences, Engineering, and Medicine – which reviews a separate report by a federally funded laboratory that examines options for treating low-activity radioactive waste at the Hanford Nuclear Reservation -- is available for public comment until Oct. 31.

A new report from the National Academies of Sciences, Engineering, and Medicine recommends ways to make supply chains -- the systems that provide populations with critical goods and services, such as food and water, gasoline, and pharmaceuticals and medical supplies – more resilient in the face of hurricanes and other disasters, drawing upon lessons learned from the 2017 hurricanes Harvey, Irma, and Maria.

Apple Senior Vice President of Worldwide Marketing Phil Schiller announces the new iPhone 6 during an Apple special event at the Flint Center for the Performing Arts on September 9, 2014 in Cupertino, California. Apple unveiled the two new iPhones the iPhone 6 and iPhone 6 Plus.; Credit: Justin Sullivan/Getty Images

Apple's latest mobile operating system — iOS 8 — is now available, and with it, a new technical hurdle for law enforcement. The company says it will be technologically impossible to access data on phones and iPads running iOS 8, because it won't allow user passcodes to be bypassed.

Our phones, of course, contain troves of information — contacts, messages, recordings — which can be helpful for investigative or prosecutorial purposes. The Supreme Court earlier this year ruled law enforcement cannot access that kind of data without a warrant. Prosecutors had already feared the warrant hurdle would be too much — Rockland County, N.Y., District Attorney Thomas Zugibe told the Wall Street Journal in June that technology "is making it easier and easier for criminals to do their trade," while the court "is making it harder for law enforcement to do theirs."

Now, even with a warrant, data from Apple devices running iOS 8 will be tough — and, Apple says, impossible — for law enforcement to get its hands on.

As The Washington Post reports, the move "amounts to an engineering solution to a legal quandary: Rather than comply with binding court orders, Apple has reworked its latest encryption in a way that prevents the company — or anyone but the device's owner — from gaining access to the vast troves of user data typically stored on smartphones or tablet computers."

Not so fast, writes an iOS forensics expert, Jonathan Zdziarski. Just because Apple will no longer help police doesn't mean police can't find ways to use existing commercial forensics tools to extract the data themselves. Wired Magazine describes how Zdziarski proved his own point:

Zdziarski confirmed with his own forensics software that he was still able to pull from a device running iOS 8 practically all of its third-party application data — that means sensitive content from Twitter, Facebook, Instagram, web browsers, and more — as well as photos and video. The attack he used impersonates a trusted computer to which a user has previously connected the phone; it takes advantage of the same mechanisms that allow users to siphon data off a device with programs like iTunes and iPhoto without entering the gadget's passcode.

"I can do it. I'm sure the guys in suits in the governments can do it," says Zdziarski.

And, Apple will still be able to turn over user data stored outside its phones, for example, on its iCloud service, The Washington Post notes. Users often back up photos, videos, emails and more to iCloud, as the recent nude photo theft reminded us.

Apple, in creating plausible deniability for itself, is also using its strongly worded new privacy stance as a marketing opportunity. It's reinforcing what it says is a commitment to privacy and transparency when it comes to government data requests. Apple says so far this year, it has received fewer than 250 government requests for data, including requests to unlock encrypted iPhones.

Tradeshift, a supply...

If we can’t secure the supply chain, eventually everything else will break

The post What happens when the global supply chain breaks? appeared first on WeLiveSecurity

The tool, which comes after a similar effort by Google, looks at how people’s traveling behavior has changed since the start of the pandemic

The post Apple releases mobility data to help combat COVID‑19 appeared first on WeLiveSecurity

New research has compared the environmental impact of four alternative methods of water supply in Copenhagen. Results indicated that rain and stormwater harvesting is the most environmentally sound approach, whilst desalination currently has a large environmental impact, mainly due to electricity use. However, if freshwater extraction is included as an impact, the environmental credibility of desalination is improved.

Green supply chain management (GSCM) is a holistic approach to improving environmental performance along the supply chain. A new study by Italian researchers on over 4000 manufacturing facilities in seven developed countries has indicated that GSCM increases environmental performance.

New research has investigated the long-term effects of applying sewage sludge to Spanish soils. The results indicate that sludge enhances soil properties, but recommends a maximum dose of 40 tons per hectare, applied biannually. Above this level, it appears the soil properties will not improve and may even worsen.

For people in the UK to eat the recommended 280 grams of fish per week, the country would have to rely on aquaculture and increasingly on imports of both wild and farmed fish from poorer countries, a recent study has revealed. This can have social and environmental implications and the researchers urge governments, particularly in developed countries, to consider nutritional advice in a global context, to minimise the impact of fish exports from poorer countries.

An analysis of European retailers revealed a range of initiatives being undertaken to improve the environmental performance of product supply chains. However, it appears that very large grocery retailers are less proactive than specialist and cooperative retailers, owing to their complex supply chains and tendency to consider consumers responsible for environmental improvements.

The pressures facing Indian manufacturers to ‘green’ their supply chain have been explored by a recent study. Both international and national pressures from government and consumers were found to play an important role in whether a company adopts green supply chain management principles, with pressures varying to some degree depending on the business’s sector and size.

A recent study has analysed risks to European renewable industries from the Chinese supply of critical raw materials. The offshore wind sector was found to be the most vulnerable of the renewable industries to supply risks. EU and industry strategies should be able to deal with these supply risks in the short term, but there are potential long-term risks to solar and wind sectors. The development of alternative technologies less reliant on these raw materials, and methods to recycle these materials is, therefore, a priority.

Adapting to climate change in coastal cities needs further development of the resilience approach as well as identifying how it can be practically used in local actions, according to a new study. The researchers present resilience as a flexible, practical way of dealing with climate change's impacts, such as coastal flooding, which can be easily built into adaptation measures.

The actual carbon footprint of products and services can differ considerably according to how energy used to manufacture the product was generated – for example, whether it was generated by fossil fuel or renewable sources. A recent US study has therefore recommended that differences in regional power supply should be acknowledged by life cycle assessments of products and services.

According to UK researchers, caution must be taken in the use of shale gas until more is known about its environmental impacts. Using US data, they estimated the additional emissions associated with the extraction of gas from shale compared to that of conventional sources and highlighted concerns from the US that extraction could bring significant risks of ground and surface water contamination.

Renewable technologies could supply 77 per cent of the world demand for energy by 2050, according to a report recently published by the IPCC. However, strong and flexible national and international policies are needed to stimulate investment and encourage accelerated use of renewable energy. The most pessimistic scenarios see the renewables share remaining almost static until mid-century.