Archives, Room Use Only - TK5262.H65 1914

Archives, Room Use Only - TK5811.B83 1920

Archives, Room Use Only - Z43.C37 1923

Proteomic analysis of peripheral cells reveals aspects of psychiatric disorder.

Amendments to the Bangalore Water Supply Sewerage Act, 1964, have made installation of automatic water level control system and provision of internal

September 28, 2015

Good design in any discipline usually carries a structure of order and harmony. Since the Renaissance, artists and architects have used a strong understanding of proportions to create aesthetically pleasing architecture. Many of these classical design principles have followed us into modern times and can be found today in effective web design.

Take an A4 piece of paper for example. If you take it and halve it, the resulting size is A5 with the same exact proportions. No other proportion has the same properties. 16th century architect, Andrea Palladio knew this well. It is believed that because, fundamentally, most architects—like Palladio—use a similar system of proportions to plan and design spaces, buildings can look very different while remaining similar at their cores.

Structure and Beauty

It’s in human nature to...read more
By Ling Lim

A simple two-spindle based lathe system for the preparation of cylindrical samples intended for X-ray tomography is presented. The setup can operate at room temperature as well as under cryogenic conditions, allowing the preparation of samples down to 20 and 50 µm in diameter, respectively, within minutes. Case studies are presented involving the preparation of a brittle biomineral brachiopod shell and cryogenically fixed soft brain tissue, and their examination by means of ptychographic X-ray computed tomography reveals the preparation method to be mainly free from causing artefacts. Since this lathe system easily yields near-cylindrical samples ideal for tomography, a usage for a wide variety of otherwise challenging specimens is anticipated, in addition to potential use as a time- and cost-saving tool prior to focused ion-beam milling. Fast sample preparation becomes especially important in relation to shorter measurement times expected in next-generation synchrotron sources.

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°.

A review of recent and ongoing development and results within the field of biological solution small-angle X-ray scattering (BioSAXS), with a focus on the increasing complexity of biological samples, data collection and data evaluation strategies.

The title compound, C7H4F3NO2, 3-tri­fluoro­methyl-1H-pyrrolo­[1,2-c]oxazol-1-one, is the first crystal structure of the pyrrolo­[1,2-c]oxazole ring system: the fused ring system is almost planar (r.m.s. deviation = 0.006 Å). In the crystal, weak C—H⋯O and C—H⋯F hydrogen bonds link the mol­ecules into [001] chains and π–π stacking inter­actions consolidate the structure.

The local Fourier-space relation between diffracted intensity I, diffraction wavevector q and dose D, ilde I(q,D), is key to probing and understanding radiation damage by X-rays and energetic particles in both diffraction and imaging experiments. The models used in protein crystallography for the last 50 years provide good fits to experimental I(q) versus nominal dose data, but have unclear physical significance. More recently, a fit to diffraction and imaging experiments suggested that the maximum tolerable dose varies as q−1 or linearly with resolution. Here, it is shown that crystallographic data have been strongly perturbed by the effects of spatially nonuniform crystal irradiation and diffraction during data collection. Reanalysis shows that these data are consistent with a purely exponential local dose dependence, ilde I(q,D) = I0(q)exp[−D/De(q)], where De(q) ∝ qα with α ≃ 1.7. A physics-based model for radiation damage, in which damage events occurring at random locations within a sample each cause energy deposition and blurring of the electron density within a small volume, predicts this exponential variation with dose for all q values and a decay exponent α ≃ 2 in two and three dimensions, roughly consistent with both diffraction and imaging experiments over more than two orders of magnitude in resolution. The B-factor model used to account for radiation damage in crystallographic scaling programs is consistent with α = 2, but may not accurately capture the dose dependencies of structure factors under typical nonuniform illumination conditions. The strong q dependence of radiation-induced diffraction decays implies that the previously proposed 20–30 MGy dose limit for protein crystallography should be replaced by a resolution-dependent dose limit that, for atomic resolution data sets, will be much smaller. The results suggest that the physics underlying basic experimental trends in radiation damage at T ≃ 100 K is straightforward and universal. Deviations of the local I(q, D) from strictly exponential behavior may provide mechanistic insights, especially into the radiation-damage processes responsible for the greatly increased radiation sensitivity observed at T ≃ 300 K.

A tandem-double-slit optical system was constructed to evaluate the practical beam emittance of undulator radiation. The optical system was a combination of an upstream slit (S1) and downstream slit (S2) aligned on the optical axis with an appropriate separation. The intensity distribution after the double slits, I(x1, x2), was measured by scanning S1 and S2 in the horizontal direction. Coordinates having 1/sqrt e intensity were extracted from I(x1, x2), whose contour provided the standard deviation ellipse in the x1–x2 space. I(x1, x2) was converted to the corresponding distribution in the phase space, I(x1, x1'). The horizontal beam emittance was evaluated to be 3.1 nm rad, which was larger than the value of 2.4 nm rad estimated by using ray-tracing. It was found that the increase was mainly due to an increase in beam divergence rather than size.

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.

Described here are instructions for building and using an inexpensive automated microscope (AMi) that has been specifically designed for viewing and imaging the contents of multi-well plates. The X, Y, Z translation stage is controlled through dedicated software (AMiGUI) that is being made freely available. Movements are controlled by an Arduino-based board running grbl, and the graphical user interface and image acquisition are controlled via a Raspberry Pi microcomputer running Python. Images can be written to the Raspberry Pi or to a remote disk. Plates with multiple sample wells at each row/column position are supported, and a script file for automated z-stack depth-of-field enhancement is written along with the images. The graphical user interface and real-time imaging also make it easy to manually inspect and capture images of individual samples.

The membrane protein EsaA is a conserved component of the type VIIb secretion system. Limited proteolysis of purified EsaA from Staphylococcus aureus USA300 identified a stable 48 kDa fragment, which was mapped by fingerprint mass spectrometry to an uncharacterized extracellular segment of EsaA. Analysis by circular dichroism spectroscopy showed that this fragment folds into a single stable domain made of mostly α-helices with a melting point of 34.5°C. Size-exclusion chromatography combined with multi-angle light scattering indicated the formation of a dimer of the purified extracellular domain. Octahedral crystals were grown in 0.2 M ammonium citrate tribasic pH 7.0, 16% PEG 3350 using the hanging-drop vapor-diffusion method. Diffraction data were analyzed to 4.0 Å resolution, showing that the crystals belonged to the enantiomorphic tetragonal space groups P41212 or P43212, with unit-cell parameters a = 197.5, b = 197.5, c = 368.3 Å, α = β = γ = 90°.

New observations by the Smithsonian’s Submillimeter Array, a radio telescope atop Mauna Kea in Hawaii, are shedding light on planet formation. The array provides sharp views by combining eight antennas into the equivalent of a single, large telescope. It can resolve details as small as a dime seen from seven miles away.

The post Cosmic “baby photos” of distant solar systems lend insight as to how planets form appeared first on Smithsonian Insider.

The Panoramic Survey Telescope & Rapid Response System (Pan-STARRS) PS1 telescope has discovered an asteroid about 150 feet in diameter that will come within 4 million miles of Earth in mid-October.

The post Rapid Response telescope system spots first potentially hazardous asteroid appeared first on Smithsonian Insider.

Today, researchers who found the first hypervelocity stars escaping the Milky Way announced that their search also turned up a dozen double-star systems. Half of those are merging and might explode as supernovae in the astronomically near future.

The post Astronomers discover merging star systems that might explode appeared first on Smithsonian Insider.

A new telescope has begun to virtually explore the solar system outback, and already is scoring discoveries.

The post New telescope exploring Solar System’s “outback” appeared first on Smithsonian Insider.

In a new paper, Harvard-Smithsonian Center for Astrophysics astronomer Hagai Perets studies the role of binary planetesimals--clumps that orbit each other and jointly mature via three basic processes.

The post New study examines how planetesimals influence the development of a planetary system appeared first on Smithsonian Insider.

NASA's Kepler spacecraft is proving itself to be a prolific planet hunter. Within just the first four months of data, astronomers have found evidence for more than 1,200 planetary candidates. Of those, 408 reside in systems containing two or more planets, and most of those look very different than our solar system.

The post The Kepler spacecraft’s astounding haul of multiple-planet systems appeared first on Smithsonian Insider.

Imagine a gas giant planet spanning three times more sky than the Moon looming over the molten landscape of a lava world. This alien vista exists in the newly discovered two-planet system of Kepler-36.

The post Close encounters between planetary systems of Kepler-36 stun astrophysicists appeared first on Smithsonian Insider.

The discovery of the first transiting circumbinary multi-planet system: two planets orbiting around a pair of stars, is announced by astronomers.

The post Planetary system orbiting two suns discovered by astronomers appeared first on Smithsonian Insider.

The Smithsonian Environmental Research Center has just launched a new series of 15 short educational videos titled “Ecosystems on the Edge,” which mainly focus on […]

The post “Ecosystems on the Edge” on Youtube appeared first on Smithsonian Insider.

Hellbenders, aquatic salamanders from the eastern United States, are surprisingly good at dealing with unpredictable weather. In a recent study published in the Journal of […]

The post Zoo scientists find sudden stream temperature changes boost hellbender immune systems appeared first on Smithsonian Insider.

Our solar system seems like a neat and orderly place, with small, rocky worlds near the Sun and big, gaseous worlds farther out, all eight […]

The post Asteroid diversity = “snow globe” Solar System appeared first on Smithsonian Insider.

For the first time, astronomers have detected the presence of complex organic molecules, the building blocks of life, in a protoplanetary disk surrounding a young […]

The post Complex Organic Molecules Discovered in Infant Star System appeared first on Smithsonian Insider.

Astronomers announced today that they have found the organic molecule methyl alcohol, or methanol, in the TW Hydrae protoplanetary disk. This is the first such […]

The post Methanol reveals comets forming in distant solar system appeared first on Smithsonian Insider.

Isabella Guardamagna, Elisabetta Bassi, Monica Savio, Paola Perucca, Ornella Cazzalini, Ennio Prosperi, and Lucia A. Stivala

Assessing DNA repair is an important endpoint to study the DNA damage response for investigating the biochemical mechanisms of this process and the efficacy of chemotherapy, which often uses DNA damaging compounds. Numerous in vitro methods to biochemically characterize DNA repair mechanisms have been developed so far. However, they show some limitations mainly due to the lack of chromatin organization. Here we describe a functional cell-free system to study DNA repair synthesis in vitro, using G1-phase nuclei isolated from human cells treated with different genotoxic agents. Upon incubation in the correspondent damage-activated cytosolic extracts, containing biotin-16-dUTP, nuclei are able to initiate DNA repair synthesis. The use of specific DNA synthesis inhibitors markedly decreased biotinylated dUTP incorporation, indicating the specificity of the repair response. Exogenously added human recombinant PCNA protein, but not the sensors of UV-DNA damage DDB2 or DDB1, stimulated UVC induced dUTP incorporation. In contrast, a DDB2^PCNA- mutant protein, unable to associate with PCNA, interfered with DNA repair synthesis. Given its responsiveness to different type of DNA lesions, this system offers an additional tool to study DNA repair mechanisms.

Even tiny crustaceans scuttling across the deepest, darkest depths of the ocean floor will feel the effects of climate change, according to a new study […]

The post Climate change to impact even deep-ocean ecosystems appeared first on Smithsonian Insider.

What was happening (geologically speaking) on Earth way back when it was a mere babe and being showered with meteorites? Until a time machine is […]

The post Beautiful meteorites hold clues to solar system’s violent start appeared first on Smithsonian Insider.

Jim Zimbelman, planetary geologist in the Center for Earth and Planetary Studies at the Smithsonian’s National Air and Space Museum, shares his three favorite images from the exhibition "Beyond: Visions of Our Solar System.” On view at the Air and Space Museum through May 2, 2011, the exhibition by artist Michael Benson combines art, science, photography and exploration to unveil the diverse landscapes found on the planets in our Solar System.

The post A new perspective on the Solar System with Planetary Geologist Jim Zimbelman appeared first on Smithsonian Insider.

Most earthworms in U.S. soils aren’t native–and they are threatening America’s forests. Smithsonian ecologist Melissa McCormick explains how earthworms can be good for gardens and […]

The post Ecosystems on the Edge: Earthworm Invaders appeared first on Smithsonian Insider.

Full System Care PUP is a potentially unwanted program that states it scans Windows for Malware/Pup Threats, ways to Enhance System Performance, System/User Software Related issues, and Startup/Uninstall and User Items. When Full System Care scans a computer it will list a variety of detected issues, but state that you need to first purchase a license before you can fix them. My concern is that many of the issues that it detects are not what I feel would cause a problem on a computer.

This article was published first at Remove the Full System Care PUP

Shallow-water seagrasses can’t survive without enough light. And fish, shrimp, crabs and other creatures we rely on for food can’t survive without seagrasses. Smithsonian biologist […]

The post Ecosystems on the Edge: Underwater Light and Seagrass appeared first on Smithsonian Insider.

Smithsonian biologist Cindy Gilmour describes where mercury pollution comes from, how it morphs into the neurotoxin methylmercury, and if we’re finally starting to solve the […]

The post Ecosystems on the Edge: Tracking Mercury appeared first on Smithsonian Insider.

When Gary Graves cranks up his boom box and drives remote back roads through pine plantations in Texas, Louisiana and other southern states, a few […]

The post Rare American warbler surprises scientists by adapting, thriving in a new ecosystem appeared first on Smithsonian Insider.

When creating a System Composer architecture model, if the following functions are called with an invalid or missing stereotype, it can cause the model to get corrupted and might lead to a MATLAB crash:

• addComponent
• addPort
• connect

In certain scenarios, a Subsystem Reference block changes its position. It can happen during: 

1. Loading of top model which contains the Subsystem Reference block 
2. Synchronization of Subsystem Reference block's contents
3. Converting a subsystem to Subsystem Reference block 

Source: Peter Krauth for Streetwise Reports   05/05/2020

Gold has the wind in its sails. Its price in U.S. dollars is up an astounding 62% since late 2015, with a 33% gain in just the past year, outpacing all major assets.

And investors are only just starting to get interested.

The Covid-19 pandemic and its economic impact is a major catalyst. More than $8 trillion in global fiscal stimulus has already been committed to alleviate unemployment and support struggling businesses. But it's almost certainly not enough.

"That sets up the perfect storm for X-Terra, making it a Strong BUY. With its outstanding initial drill results at the Grog property and the remarkable potential at Troilus East, I can easily see XTT double its market cap in the next 6-12 months, perhaps sooner."

Near-zero interest rates combined with unprecedented money-printing are creating ideal conditions for the ultimate inflation hedge: gold. And that's making junior gold equities the go-to sector as the metal rapidly approaches its all-time high.

Amidst all this, one junior gold explorer with a nascent exploration breakthrough could soar as the gold bull market moves into its next phase.

New Brunswick Could Host Large New Gold System

Bona fide new discoveries with district potential are rare. Participating early in one could be a life-changing event.

That's what makes X-Terra Resources Inc. (XTT:TSX.V; XTRRF:OTCMKTS; XTR:FSE) such a compelling investment right now. XTT shares are a Strong BUY, with the potential to double in the next 6–12 months.

Here's my rationale…

Its top two projects are in neighboring Canadian provinces, both among the highest-ranking gold mining jurisdictions globally.

In early March, X-Terra completed its inaugural drill program over the Grog and Northwest Properties in the province of New Brunswick along the McKenzie Fault. It comprised 1,904 meters over 16 holes.

Initial results are in, and they're impressive.

Hole GRG-20-012 identified gold mineralization over a significant width. One interval averaged 0.41 g/t gold over 36 meters, including 0.46 g/t gold over 31 meters and 7.59 g/t gold over 0.6 meters. The company points out that 6 of the remaining holes returned mineralized intervals between 0.1 g/t gold and 0.35 g/t gold.

X-Terra President and CEO Michael Ferreira said, "This is a significant exploration breakthrough, and reinforces our expectations that a large epithermal system is present. While more in-depth geological work, which includes drilling is needed, it remains evident that the 11 holes (1570 metres drilled) only covered a very small fraction of the targeted environment. Reaching a significant mineralized interval this shallow (From 107 metres to 143 metres, in GRG-20-012) is a milestone we were relentlessly pursuing after completing the limited field exploration programs based predominately on roadside trenching. The information obtained in this program will allow the detailed follow up on the Grog Target but also allow the company to refine and generate more high priority targets carrying the same geological characteristics to that of the Grog target. This provides a monumental shift moving forward."

HIGHLIGHTS FROM HOLE GRG-20-012

The beauty of this impressive drill hole intercept is its signature, which contains a wide alteration halo associated with sulfidation and quartz veining. Based on the geophysical data, they will be able to track the gold bearing system at depth using an advanced data processing approach combined with their geological knowledge.

The exploration team can now use the signature to formulate similar drill targets elsewhere on the property, with the potential for similar results.

Clearly, X-Terra's diligent, methodical and scientific approach has begun to pay off. Experience combined with a skilled overlay of induced polarization, magnetic surveys, sampling and trenching helped achieve this recent success.

Back in 2017, the company discovered high grade gold occurrences. That was followed up with further work, which delivered extensive anomalies scattered over roughly 30 km along the McKenzie Gulch regional Fault.

Their geologists then engaged a quick exploration cycle over the next 18 months, starting with an orientation geophysics survey, followed by trenching and drilling. They now have an initial model in progress, which involves an extensive magmatic hydrothermal system, and the targets generated so far are pluri-kilometric.

X-Terra is contemplating that it could be onto a brand new regional gold trend.

Such outstanding recent drill intercepts make for an even more exciting outlook. That's because future exploration targets will be chosen with a better understanding of the geological sequence. And that should improve the odds of more successful drill results.

But perhaps the biggest takeaway from hole GRG-20-012 is the suggestion that it demonstrates real potential for a large epithermal system. And that could mean a whole lot of gold lies beneath, something further exploration will answer.

Quebec Offers Huge Promise Near Large Developing Gold Mine

Despite the exciting outlook offered by the Grog area located in New Brunswick, X-Terra is far from being a one-trick pony.

Also bursting with massive untapped potential is the Troilus East Property, located in north-central Quebec.

X-Terra's Troilus East project is immediately adjacent to Troilus Gold Corp.'s former producing gold-copper mine. Even after 15 years of historic production, the Troilus Gold Project currently boasts 4.71 million ounces of gold equivalent in the Indicated category, plus 1.76 million ounces of gold equivalent in the Inferred category.

Early last year, X-Terra announced the completion of a high-resolution magnetic survey on the Troilus-East property. Management continues to advance the project, using the same diligent and methodical scientific approach that has brought success to the Grog discovery. XTT will be using magnetic signatures to perform follow-up work, looking to identify geological contexts with characteristics similar to those of the Troilus gold-copper mineral deposit.

Since tripling its land position, X-Terra has locked up the largest adjacent land claims to Troilus Gold of any public company.

That's exciting, as Troilus Gold is considered by some as the largest—or at least one of the largest—undeveloped gold deposits in North America. And that could well make X-Terra a future target should Troilus Gold or other players look to lock up more of the adjacent land.

People and Projects Offer Massive Potential

As is often the case, people are as important to a junior explorer's success as its properties. As a former professional motorcycle racer, X-Terra President and CEO Michael Ferreira saw the potential of resource exploration to create immense value for shareholders. Now living full-time in the Quebec mining town of Rouyn Noranda, Ferreira has judiciously curated a winning team.

Dr. Michael Byron, Ph.D., P.Geo. and a company director, has thirty years of field work, research and senior management positions across gold, base-metals, diamond and gemstone exploration. He was instrumental in re-discovering Falco Resources' leading asset, the Horne 5 deposit.

A testament to the quality of management is XTT's rare combination of tight share structure and quality projects. On a fully diluted basis, there are just 80 million shares outstanding, with management's skin in the game representing 6% of ownership.

As I see it, X-Terra's combination of quality management with exceptional high potential projects is starting to bear fruit. Its New Brunswick-located Grog and Northwest project, along with its Troilus East project located in Quebec, are highly prospective.

Given that the global fiscal and monetary response to the coronavirus has generated a tsunami of money printing, the gold market is kicking into high gear.

That sets up the perfect storm for X-Terra, making it a Strong BUY. With its outstanding initial drill results at the Grog property and the remarkable potential at Troilus East, I can easily see XTT double its market cap in the next 6–12 months, perhaps sooner.

In my view these are the early days of a string of successful exploration results, making XTT.V radically undervalued, for now.

Peter Krauth is a former portfolio adviser and a 20-year veteran of the resource market, with special expertise in energy, metals and mining stocks. He has been editor of a widely circulated resource newsletter, and contributed numerous articles to Kitco.com, BNN Bloomberg and the Financial Post. Krauth holds a Master of Business Administration from McGill University and is headquartered in resource-rich Canada.

Disclosure:
1) Peter Krauth: I, or members of my immediate household or family, own shares of the following companies mentioned in this article: None. I personally am, or members of my immediate household or family are, paid by the following companies mentioned in this article: X-Terra Resources. My company has a financial relationship with the following companies mentioned in this article: None. I determined which companies would be included in this article based on my research and understanding of the sector.
2) The following companies mentioned in this article are billboard sponsors of Streetwise Reports: X-Terra Resources. Click here for important disclosures about sponsor fees. As of the date of this article, an affiliate of Streetwise Reports has a consulting relationship with X-Terra Resources. Please click here for more information. An affiliate of Streetwise Reports is conducting a digital media marketing campaign for this article on behalf of X-Terra Resources. Please click here for more information. The information provided above is for informational purposes only and is not a recommendation to buy or sell any security.
3) Statements and opinions expressed are the opinions of the author and not of Streetwise Reports or its officers. The author is wholly responsible for the validity of the statements. The author was not paid by Streetwise Reports for this article. Streetwise Reports was not paid by the author to publish or syndicate this article. Streetwise Reports requires contributing authors to disclose any shareholdings in, or economic relationships with, companies that they write about. Streetwise Reports relies upon the authors to accurately provide this information and Streetwise Reports has no means of verifying its accuracy.
4) This article does not constitute investment advice. Each reader is encouraged to consult with his or her individual financial professional and any action a reader takes as a result of information presented here is his or her own responsibility. By opening this page, each reader accepts and agrees to Streetwise Reports' terms of use and full legal disclaimer. This article is not a solicitation for investment. Streetwise Reports does not render general or specific investment advice and the information on Streetwise Reports should not be considered a recommendation to buy or sell any security. Streetwise Reports does not endorse or recommend the business, products, services or securities of any company mentioned on Streetwise Reports.
5) From time to time, Streetwise Reports and its directors, officers, employees or members of their families, as well as persons interviewed for articles and interviews on the site, may have a long or short position in securities mentioned. Directors, officers, employees or members of their immediate families are prohibited from making purchases and/or sales of those securities in the open market or otherwise from the time of the interview or the decision to write an article until three business days after the publication of the interview or article. The foregoing prohibition does not apply to articles that in substance only restate previously published company releases. As of the date of this article, officers and/or employees of Streetwise Reports LLC (including members of their household) own securities of X-Terra Resources, a company mentioned in this article.

( Companies Mentioned: XTT:TSX.V; XTRRF:OTCMKTS; XTR:FSE, )