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Awarding – and imagining – teaching excellence (OECD Education Today Blog)

Tertiary qualifications have become the entrance ticket for modern societies. Never before have those with advanced qualifications had the life chances they enjoy today, and never before have those who struggled to acquire a good education paid the price they pay today.




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What matters for managing classrooms? (OECD Education Today Blog)

Teaching is a demanding profession. Teachers are responsible for developing the skills and knowledge of their students, helping them overcome social and emotional hurdles and maintaining equitable, cohesive and productive classroom environments. On top of their teaching responsibilities, they are also expected to engage in continued professional development activities throughout their careers.




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Canada: Leveraging Training and Skills Development in SMEs - An analysis of two urban regions Montreal and Winnipeg

This paper looks at a study carried out among 80 small and medium sized enterprises (SMEs) in two Canadian cities, Montréal and Winnipeg, based on a survey and case studies, which show the importance of innovation among Canadian SMEs. These innovations in turn create new demands for skill development, both through formal training and in informal activities.




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Call for papers: Engaging employers in Skills development and utilisation

The work will seek to identify good practices for employer engagement in the areas of both developing and utilising skills, including setting up innovative workplace learning methods, designing effective employer partnerships with the employment and training system as well as financing mechanisms for employer-led training, including how best to reach SMEs.




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Draft principles for leveraging local benefits from global sporting events

This document presents draft principles for leveraging local benefits from global sporting events. These draft principles have been prepared as part of a project on optimising the local benefits from hosting the EURO 2016. They build upon previous work on Local Development Benefits from Staging Global Events.




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Conference on engaging employers in building better local jobs and creating a more responsive skills system

This conference organised jointly by the OECD, Warwick University, the Work Foundation, and the Centre for Cities brought together stakeholders from national government departments, cities, Local Enterprise Partnerships (LEPs) as well as business, NGOs and research institutions to discuss the key challenges facing the United Kingdom in building more and better quality jobs




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Managing pesticide risk to insect pollinators: new website

This website gives information about the regulatory approaches adopted by OECD member countries to mitigate pesticide risks to insect pollinators. Following a survey of OECD member countries, it was concluded that mitigation of risks to insect pollinators is important to all its member countries, and that mitigation is a critical component of balancing the benefits of plant protection products with potential risks to insect pollinators.




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The Branch Managar State Bank Of ... vs The Managing Director Nakoda ... on 21 January, 2020

>. Learned counsel for the appellants has also filed written notes of arguments and in reply a further written note of arguments has been filed by learned counsel for the respondent. The respondent, as an account holder in the State Bank of India (SBI), suffered a loss of Rs. 18,35 lakh through 20 internet transactions and the money was transferred to 20 accounts, all with the SBI. The account holder/complainant filed Petition No. 1 of 2013 before the leamed A.O./Secretary to Government, Information Technology, Electronics and Communications Department, Government of Andhra Pradesh. After hearing the parties in detail and taking into consideration the defence of the Bank, which is the appellants herein, and all the relevant documents, learned A.O. by the impugned order dated 12,3.2014 has allowed claim of the complainant who is respondent herein and directed SBI to pay the entire amount of Rs. 18.35 lakh with interest from the date of loss ie. 13.5.2012 till the date of payment along with the costs of Rs. 39,750.00. The rate of interest is 18% per annum. Admittedly, nothing has been paid by SBI so far.




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Ratnagiri Nagar Parishad vs Gangaram Narayan Ambekar on 6 May, 2020

1. Leave granted.

2. This appeal emanates from the judgment and order dated 29.8.2016 passed by the High Court of Judicature at Bombay 1 in Second Appeal No. 771/2015, whereby the judgment and decree dated 11.2.2015 passed by the District Judge, Ratnagiri 2 in Regular Civil Appeal No. 34/2011 came to be affirmed, as a result of which the suit filed by the respondent Nos. 1 to 19 (original plaintiffs) in the Court of Civil Judge, Senior Division, Signature Not Verified Digitally signed by DEEPAK SINGH Date: 2020.05.06 16:03:13 IST Reason:

1 For short, “the High Court” 2 For short, “the first appellate Court” 2 Ratnagiri3 being RCS No. 25/2005 for permanent injunction against the appellant and respondent No. 20 (State of Maharashtra), restraining them from starting the Solid Waste Disposal Project4 at the suit property, has been decreed. In other words, the trial Court had dismissed the suit, but the first appellate Court allowed (decreed) the same, which decision has been upheld by the High Court in the Second Appeal.




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Sir Stirling Moss tragically dies aged 90 as his wife pays touching tribute

The great motor-racing driver and one of the most lionised figures in the history of British sport, 'closed his eyes' in the early hours of Easter morning.




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Meet Jen Gunter: The doctor waging war on the cult of wellness

She's the internet's resident gynaecologist who deals in straight-talk, hard facts and medical science. So profiteering gurus who peddle myths and misinformation make her want to scream




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The life-changing magic of a roast chicken dinner 

Isabel Vincent's marriage was falling apart. Her elderly neighbour was grief-stricken. Little did they know that a supper invitation would heal them both




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Re-imagining India with new data


A quiet but steady revolution seems to be underway as both government and private individuals and organizations increasingly explore ways to make more data available to the people and in various innovative ways to facilitate application. Shamala Kittane reports.




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Wilde imagination: Oscar as Holmes

Imagine Oscar Wilde, the famed playwright and poet, in the mold of a Sherlock Holmes or a Hercules Poirot. That’s precisely what author Gyles Brandreth does - make a convincing detective out of Wilde even as he remains faithful in his portrayal of him as an aesthete and a bohemian with his flamboyant style and acerbic wit.




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Pune: Only 0.36% tested for contagion in PMC limits

Around 12,000 people have been tested for coronavirus infection in the PMC limits so far, accounting for just 0.35% of the total population of 33 lakh.




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Senior UK medic confident "R" contagion number below 1 across country

Britain's deputy chief medical officer said on Saturday he was confident the coronavirus "R" number, a measure of the rate of contagion, was below 1 across the United Kingdom.




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Delhi Govt Asks District Magistrates to Release 2,446 Tablighi Jamaat Members

As many as 567 foreign attendees of the congregation held in Delhi's Nizamuddin area in March, will be handed over to the police.




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Historical Fiction: Imagining—and WRITING—the PAST!

July 23–27. Registration required

Mon, 07/23/2012 -
10:00 to 16:00
Mon, July 23rd, 2012 |
11:00 am to 5:00 pm
Tue, July 24th, 2012 |
11:00 am to 5:00 pm
Wed, July 25th, 2012 |
11:00 am to 5:00 pm
Thu, July 26th, 2012 |
11:00 am to 5:00 pm
Fri, July 27th, 2012 |
11:00 am to 5:00 pm

July 23–27

Price: 
$850
Family Programs: 
Sold out: 
0




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Historical Fiction: Imagining—and WRITING—the PAST!

Summer Writing Camps with the DiMenna Children’s History Museum and Writopia Lab! Pre-registration required.

Sat, 06/23/2012 - 09:00 to Wed, 06/27/2012 - 16:00
Sat, June 23rd, 2012 | 10:00 am to Wed, June 27th, 2012 | 5:00 pm

Ages 8–18

Price: 
$850
Family Programs: 
Sold out: 
0




agi

Historical Fiction: Imagining—and WRITING—the PAST!

Summer Writing Camps with the DiMenna Children’s History Museum and Writopia Lab! Pre-registration required.

 

Mon, 06/11/2012 - 09:00 to Thu, 06/14/2012 - 16:00
Mon, June 11th, 2012 | 10:00 am to Thu, June 14th, 2012 | 5:00 pm

For ages 8–18

Price: 
$700
Family Programs: 
Sold out: 
0




agi

Ex ordinis philosophorum mandato renuntiantur philosophiae doctores: et artium liberalium magistri rectore magnifico Ioanne Adolpho Overbeck ... decano Gustavo Henrico Wiedemann ... procancellario Ludovico Lange ... inde a die primo mensis Novembris a. MD

Archives, Room Use Only - QC761.W54 1876




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Hubble sees fragile comet break into dozens of pieces




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Magician Roy Horn of 'Siegfried and Roy' dead at 75 from coronavirus




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Keynote, Magic Move, and You

A confession: I love working in Keynote. Love it.

(I’m speaking, of course, of Keynote ’09. Not the feature-stripped version that was released last month. Still, I’m hopeful it’ll improve over time, since it is so very pretty.)

It’s not perfect, mind you—after four or five years of use, the program’s got some not-insignificant stability issues, crashing way more often than I’d like. But after all that time it’s still one of my favorite visual editors: it’s great for quickly prototyping UI components, sketching out ideas for animation timing, and, yes, making slides.

Anyway: over the years, folks have said some very kind things about the visual design of my presentations. I don’t have any special knowledge about Keynote, mind, but thought I’d share a couple things I use in my presentations, in case anyone else finds them helpful.

First up: Magic Move.


Basically, Magic Move is a transition you can apply between two slides. If the second slide shares any objects—images, text boxes, or what-have-you—with the first slide, those objects will be, well, magically moved from one position to the next.

Here’s a very, very simple example:

As you can see, there’s just one object on both slides: a picture of my good friend Dwayne. The image is the same on both slides—you can duplicate the slide, or copy/paste the object to the second slide—but since its position changed, Magic Move kinda tweens the photo to its new position.

Now, I don’t use Magic Move a lot, usually preferring to just lean on simple dissolves between slides. But it’s great for managing more complex animations, like this one:

This animation requires a bit more setup, but the principle is basically the same:

  1. In the first slide, the “screenshots” you see are basically a lot of tiny little screencaps, each containing just one element of the interface. (So there’s an image for the toolbar in Editorially’s editor, another for the discussion panel, another for the account menu avatar, and so on.)
    1. When I’m arranging complex flyouts like this, I’ll usually have a reference screenshot on the canvas as a base layer, and place the smaller screencaps atop it. Just to make sure everything’s aligned, that is.
  2. Then, in the second slide, I move all those small images where I’d like them to end up.
  3. Turn on Magic Move, and you’re left with a neat little flyout cross-section of an interface.

As with most things Keynote-related, Magic Move is pretty reliable…but the more you use it, you’ll probably run up against a couple idiosyncrasies. You can’t magicmove (oh god i’m so sorry) an object if it has any builds or actions on it; animated objects (YES MOM, I’M TALKING ABOUT GIFs) will just blink to their new position; and some objects might move completely counter to what you’d expect.

And as with anything animation-driven, it’s very, very easy to overuse and abuse: try to consider marrying the animation with what you’re actually saying, and ensure the visuals don’t outwhelm your words as you’re presenting. That said, Magic Move is a fantastic tool to keep near at hand—when used just right I think it can be, well, kinda magical.




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Senior UK medic confident "R" contagion number below 1 across country

Senior UK medic confident "R" contagion number below 1 across country




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Punjab cancels holidays, leaves of staff engaged in managing COVID-19




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Punjab CM orders magisterial probe into school van fire incident at Longowal




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Ex-Hazoori Raagi of Golden Temple tests positive; total cases 46 in Punjab




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Golden Temple ex-Hazoori Raagi dies of Covid-19




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Former Hazroori Ragi of Golden Temple dies after being tested positive for COVID-19




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Former Ragi of Golden Temple tests positive for COVID-19




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Golden Temple ex-Hazoori Raagi dies of Covid-19




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Gazetted officers in Chandigarh get magistrate powers




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Family member of former Golden Temple Hazoori Ragi tests positive for coronavirus




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Apologise for mismanaging pilgrims' return: Sukhbir to Amarinder




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Inebriated man held for creatingruckus, damaging police vehicle

A man was arrested for allegedly creating ruckus and damaging a police vehicle in an inebriated state in east Delhi’s Kalyanpuri, the police said on S




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Coherent Bragg imaging of 60 nm Au nanoparticles under electrochemical control at the NanoMAX beamline

Nanoparticles are essential electrocatalysts in chemical production, water treatment and energy conversion, but engineering efficient and specific catalysts requires understanding complex structure–reactivity relations. Recent experiments have shown that Bragg coherent diffraction imaging might be a powerful tool in this regard. The technique provides three-dimensional lattice strain fields from which surface reactivity maps can be inferred. However, all experiments published so far have investigated particles an order of magnitude larger than those used in practical applications. Studying smaller particles quickly becomes demanding as the diffracted intensity falls. Here, in situ nanodiffraction data from 60 nm Au nanoparticles under electrochemical control collected at the hard X-ray nanoprobe beamline of MAX IV, NanoMAX, are presented. Two-dimensional image reconstructions of these particles are produced, and it is estimated that NanoMAX, which is now open for general users, has the requisites for three-dimensional imaging of particles of a size relevant for catalytic applications. This represents the first demonstration of coherent X-ray diffraction experiments performed at a diffraction-limited storage ring, and illustrates the importance of these new sources for experiments where coherence properties become crucial.




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Progress in HAXPES performance combining full-field k-imaging with time-of-flight recording

An alternative approach to hard-X-ray photoelectron spectroscopy (HAXPES) has been established. The instrumental key feature is an increase of the dimensionality of the recording scheme from 2D to 3D. A high-energy momentum microscope detects electrons with initial kinetic energies up to 8 keV with a k-resolution of 0.025 Å−1, equivalent to an angular resolution of 0.034°. A special objective lens with k-space acceptance up to 25 Å−1 allows for simultaneous full-field imaging of many Brillouin zones. Combined with time-of-flight (ToF) parallel energy recording this yields maximum parallelization. Thanks to the high brilliance (1013 hν s−1 in a spot of <20 µm diameter) of beamline P22 at PETRA III (Hamburg, Germany), the microscope set a benchmark in HAXPES recording speed, i.e. several million counts per second for core-level signals and one million for d-bands of transition metals. The concept of tomographic k-space mapping established using soft X-rays works equally well in the hard X-ray range. Sharp valence band k-patterns of Re, collected at an excitation energy of 6 keV, correspond to direct transitions to the 28th repeated Brillouin zone. Measured total energy resolutions (photon bandwidth plus ToF-resolution) are 62 meV and 180 meV FWHM at 5.977 keV for monochromator crystals Si(333) and Si(311) and 450 meV at 4.0 keV for Si(111). Hard X-ray photoelectron diffraction (hXPD) patterns with rich fine structure are recorded within minutes. The short photoelectron wavelength (10% of the interatomic distance) `amplifies' phase differences, making full-field hXPD a sensitive structural tool.




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Methods for dynamic synchrotron X-ray respiratory imaging in live animals

Small-animal physiology studies are typically complicated, but the level of complexity is greatly increased when performing live-animal X-ray imaging studies at synchrotron and compact light sources. This group has extensive experience in these types of studies at the SPring-8 and Australian synchrotrons, as well as the Munich Compact Light Source. These experimental settings produce unique challenges. Experiments are always performed in an isolated radiation enclosure not specifically designed for live-animal imaging. This requires equipment adapted to physiological monitoring and test-substance delivery, as well as shuttering to reduce the radiation dose. Experiment designs must also take into account the fixed location, size and orientation of the X-ray beam. This article describes the techniques developed to overcome the challenges involved in respiratory X-ray imaging of live animals at synchrotrons, now enabling increasingly sophisticated imaging protocols.




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Unexpected reactions of NHC*—CuI and —AgI bromides with potassium thio- or seleno­cyanate

The reactions of N-heterocyclic carbene CuI and AgI halides with potassium thio- or seleno­cyanate gave unexpected products. The attempted substitution reaction of bromido­(1,3-dibenzyl-4,5-di­phenyl­imidazol-2-yl­idene)silver (NHC*—Ag—Br) with KSCN yielded bis­[bis­(1,3-dibenzyl-4,5-di­phenyl­imidazol-2-yl­idene)silver(I)] tris­(thio­cyanato)­argentate(I) diethyl ether disolvate, [Ag(C29H24N2)2][Ag(NCS)3]·2C4H10O or [NHC*2Ag]2[Ag(SCN)3]·2Et2O, (1), while reaction with KSeCN led to bis­(μ-1,3-dibenzyl-4,5-diphenyl-2-seleno­imidazole-κ2Se:Se)bis­[bromido­(1,3-dibenzyl-4,5-diphenyl-2-seleno­imid­azole-κSe)silver(I)] di­chloro­methane hexa­solvate, [Ag2Br2(C29H24N2Se)4]·6CH2Cl2 or (NHC*Se)4Ag2Br2·6CH2Cl2, (2), via oxidation of the NHC* fragment to 2-seleno­imidazole. This oxidation was observed again in the reaction of NHC*—Cu—Br with KSeCN, yielding catena-poly[[[(1,3-dibenzyl-4,5-diphenyl-2-seleno­imidazole-κSe)copper(I)]-μ-cyanido-κ2C:N] aceto­nitrile monosolvate], {[Cu(CN)(C29H24N2Se)]·C2H3N}n or NHC*Se—CuCN·CH3CN, (3). Compound (1) represents an organic/inorganic salt with AgI in a linear coordination in each of the two cations and in a trigonal coordination in the anion, accompanied by diethyl ether solvent mol­ecules. The tri-blade boomerang-shaped complex anion [Ag(SCN)3]2− present in (1) is characterized by X-ray diffraction for the first time. Compound (2) comprises an isolated centrosymmetric mol­ecule with AgI in a distorted tetra­hedral BrSe3 coordination, together with di­chloro­methane solvent mol­ecules. Compound (3) exhibits a linear polymeric 1∞[Cu—C≡N—Cu—] chain structure with a seleno­imidazole moiety additionally coordinating to each CuI atom, and completed by aceto­nitrile solvent mol­ecules. Electron densities associated with an additional ether solvent mol­ecule in (1) and two additional di­chloro­methane solvent mol­ecules in (2) were removed with the SQUEEZE procedure [Spek (2015). Acta Cryst. C71, 9–18] in PLATON.




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Formation of a highly dense tetra-rhenium cluster in a protein crystal and its implications in medical imaging

The fact that a protein crystal can serve as a chemical reaction vessel is intrinsically fascinating. That it can produce an electron-dense tetranuclear rhenium cluster compound from a rhenium tri­carbonyl tri­bromo starting compound adds to the fascination. Such a cluster has been synthesized previously in vitro, where it formed under basic conditions. Therefore, its synthesis in a protein crystal grown at pH 4.5 is even more unexpected. The X-ray crystal structures presented here are for the protein hen egg-white lysozyme incubated with a rhenium tri­carbonyl tri­bromo compound for periods of one and two years. These reveal a completed, very well resolved, tetra-rhenium cluster after two years and an intermediate state, where the carbonyl ligands to the rhenium cluster are not yet clearly resolved, after one year. A dense tetranuclear rhenium cluster, and its technetium form, offer enhanced contrast in medical imaging. Stimulated by these crystallography results, the unusual formation of such a species directly in an in vivo situation has been considered. It offers a new option for medical imaging compounds, particularly when considering the application of the pre-formed tetranuclear cluster, suggesting that it may be suitable for medical diagnosis because of its stability, preference of formation and biological compatibility.




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The achievable resolution for X-ray imaging of cells and other soft biological material

X-ray imaging of soft materials is often difficult because of the low contrast of the components. This particularly applies to frozen hydrated biological cells where the feature of interest can have a similar density to the surroundings. As a consequence, a high dose is often required to achieve the desired resolution. However, the maximum dose that a specimen can tolerate is limited by radiation damage. Results from 3D coherent diffraction imaging (CDI) of frozen hydrated specimens have given resolutions of ∼80 nm compared with the expected resolution of 10 nm predicted from theoretical considerations for identifying a protein embedded in water. Possible explanations for this include the inapplicability of the dose-fractionation theorem, the difficulty of phase determination, an overall object-size dependence on the required fluence and dose, a low contrast within the biological cell, insufficient exposure, and a variety of practical difficulties such as scattering from surrounding material. A recent article [Villaneuva-Perez et al. (2018), Optica, 5, 450–457] concluded that imaging by Compton scattering gave a large dose advantage compared with CDI because of the object-size dependence for CDI. An object-size dependence would severely limit the applicability of CDI and perhaps related coherence-based methods for structural studies. This article specifically includes the overall object size in the analysis of the fluence and dose requirements for coherent imaging in order to investigate whether there is a dependence on object size. The applicability of the dose-fractionation theorem is also discussed. The analysis is extended to absorption-based imaging and imaging by incoherent scattering (Compton) and fluorescence. This article includes analysis of the dose required for imaging specific low-contrast cellular organelles as well as for protein against water. This article concludes that for both absorption-based and coherent diffraction imaging, the dose-fractionation theorem applies and the required dose is independent of the overall size of the object. For incoherent-imaging methods such as Compton scattering, the required dose depends on the X-ray path length through the specimen. For all three types of imaging, the dependence of fluence and dose on a resolution d goes as 1/d4 when imaging uniform-density voxels. The independence of CDI on object size means that there is no advantage for Compton scattering over coherent-based imaging methods. The most optimistic estimate of achievable resolution is 3 nm for imaging protein molecules in water/ice using lensless imaging methods in the water window. However, the attainable resolution depends on a variety of assumptions including the model for radiation damage as a function of resolution, the efficiency of any phase-retrieval process, the actual contrast of the feature of interest within the cell and the definition of resolution itself. There is insufficient observational information available regarding the most appropriate model for radiation damage in frozen hydrated biological material. It is advocated that, in order to compare theory with experiment, standard methods of reporting results covering parameters such as the feature examined (e.g. which cellular organelle), resolution, contrast, depth of the material (for 2D), estimate of noise and dose should be adopted.




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Combining random microseed matrix screening and the magic triangle for the efficient structure solution of a potential lysin from bacteriophage P68

Two commonly encountered bottlenecks in the structure determination of a protein by X-ray crystallography are screening for conditions that give high-quality crystals and, in the case of novel structures, finding derivatization conditions for experimental phasing. In this study, the phasing molecule 5-amino-2,4,6-triiodoisophthalic acid (I3C) was added to a random microseed matrix screen to generate high-quality crystals derivatized with I3C in a single optimization experiment. I3C, often referred to as the magic triangle, contains an aromatic ring scaffold with three bound I atoms. This approach was applied to efficiently phase the structures of hen egg-white lysozyme and the N-terminal domain of the Orf11 protein from Staphylococcus phage P68 (Orf11 NTD) using SAD phasing. The structure of Orf11 NTD suggests that it may play a role as a virion-associated lysin or endolysin.




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Visualization of protein crystals by high-energy phase-contrast X-ray imaging

For the extraction of the best possible X-ray diffraction data from macromolecular crystals, accurate positioning of the crystals with respect to the X-ray beam is crucial. In addition, information about the shape and internal defects of crystals allows the optimization of data-collection strategies. Here, it is demonstrated that the X-ray beam available on the macromolecular crystallo­graphy beamline P14 at the high-brilliance synchrotron-radiation source PETRA III at DESY, Hamburg, Germany can be used for high-energy phase-contrast microtomography of protein crystals mounted in an optically opaque lipidic cubic phase matrix. Three-dimensional tomograms have been obtained at X-ray doses that are substantially smaller and on time scales that are substantially shorter than those used for diffraction-scanning approaches that display protein crystals at micrometre resolution. Adding a compound refractive lens as an objective to the imaging setup, two-dimensional imaging at sub-micrometre resolution has been achieved. All experiments were performed on a standard macromolecular crystallography beamline and are compatible with standard diffraction data-collection workflows and apparatus. Phase-contrast X-ray imaging of macromolecular crystals could find wide application at existing and upcoming low-emittance synchrotron-radiation sources.




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Shack–Hartmann wavefront sensors based on 2D refractive lens arrays and super-resolution multi-contrast X-ray imaging

Different approaches of 2D lens arrays as Shack–Hartmann sensors for hard X-rays are compared. For the first time, a combination of Shack–Hartmann sensors for hard X-rays (SHSX) with a super-resolution imaging approach to perform multi-contrast imaging is demonstrated. A diamond lens is employed as a well known test object. The interleaving approach has great potential to overcome the 2D lens array limitation given by the two-photon polymerization lithography. Finally, the radiation damage induced by continuous exposure of an SHSX prototype with a white beam was studied showing a good performance of several hours. The shape modification and influence in the final image quality are presented.




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Synchrotron multimodal imaging in a whole cell reveals lipid droplet core organization

A lipid droplet (LD) core of a cell consists mainly of neutral lipids, triacylglycerols and/or steryl esters (SEs). The structuration of these lipids inside the core is still under debate. Lipid segregation inside LDs has been observed but is sometimes suggested to be an artefact of LD isolation and chemical fixation. LD imaging in their native state and in unaltered cellular environments appears essential to overcome these possible technical pitfalls. Here, imaging techniques for ultrastructural study of native LDs in cellulo are provided and it is shown that LDs are organized structures. Cryo soft X-ray tomography and deep-ultraviolet (DUV) transmittance imaging are showing a partitioning of SEs at the periphery of the LD core. Furthermore, DUV transmittance and tryptophan/tyrosine auto-fluorescence imaging on living cells are combined to obtain complementary information on cell chemical contents. This multimodal approach paves the way for a new label-free organelle imaging technique in living cells.




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Quantitative three-dimensional nondestructive imaging of whole anaerobic ammonium-oxidizing bacteria

Anaerobic ammonium-oxidizing (anammox) bacteria play a key role in the global nitrogen cycle and in nitrogenous wastewater treatment. The anammox bacteria ultrastructure is unique and distinctly different from that of other prokaryotic cells. The morphological structure of an organism is related to its function; however, research on the ultrastructure of intact anammox bacteria is lacking. In this study, in situ three-dimensional nondestructive ultrastructure imaging of a whole anammox cell was performed using synchrotron soft X-ray tomography (SXT) and the total variation-based simultaneous algebraic reconstruction technique (TV-SART). Statistical and quantitative analyses of the intact anammox bacteria were performed. High soft X-ray absorption composition inside anammoxosome was detected and verified to be relevant to iron-binding protein. On this basis, the shape adaptation of the anammox bacteria response to iron was explored.




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Laser-induced metastable mixed phase of AuNi nanoparticles: a coherent X-ray diffraction imaging study

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.




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Development of an X-ray imaging detector for high-energy X-ray microtomography

A dedicated X-ray imaging detector for 200 keV high-energy X-ray microtomography was developed to realize high-efficiency high-resolution imaging while keeping the field of view wide.




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Bragg Edge Analysis for Transmission Imaging Experiments software tool: BEATRIX

BEATRIX, is a new tool for performing data analysis of energy-resolved neutron-imaging experiments involving intense fitting procedures of multi-channel spectra. The use of BEATRIX is illustrated for a test specimen, providing spatially resolved 2D maps for residual strains and Bragg edge heights.