#HOW CAN A COPPER PIPE INTERACT WITH A MAGNET?
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zestychille · 2 years ago
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Science Tumblr Help
I have a question for the science side of tumblr that needs approach without bias. Because every single piece of literature I read is full of spiritual bullshit instead of science.
I held two copper wires in my hand bend in an l shape. When I walked forward, they crossed. I know my hands well, I did not change their inclination. I didn’t cross them myself. I walked with copper wires in my hands, and they cross over a specific spot. I don’t need them to cross there. I don’t want them to cross there. But I don’t hinder or help them, and they cross there. 
Are these copper wires interacting with a magnetic field of some sort? Or is there an airflow pattern that would be more likely to make them cross? 
I am a skeptic, not a spiritual person, but if I mention it to anyone they start talking about crystals and shit. I am looking for a scientific answer to a phenomenon I have witnessed. I don’t do religion, or spirituality, or any of that shit. I don’t have an agenda to prove anything. I just want to know why the rods cross without external changes, and if that has any ability to be an interaction with a magnetic field. 
I am sick of hearing a religious debate about it, don’t go there. I want a scientific explanation for something I have witnessed. i don’t want a brush off from the billions of lazy articles on google, or a psychic crazy bullshit form some mystic snakeoil salesman.  I don’t need to know what is causing the specific magnetic field. I just need to understand the difference, and how it can exist. What is happening with the copper to move it when I do not help or hinder it specifically? 
And why is it that anyone who is skeptical that anything exists there refuses to hold the copper right? Why do they hold it differently than I do? Is it because they have an agenda to disprove instead of approaching impartially? And why do people trying to prove an existence all of a sudden start talking spiritual bullshit instead of approaching it scientifically. Both sides drive me insane.
Why are people unable to witness something they don’t understand and approach it scientifically? Why am I struggling so hard to find scientific data on this process and it’s applications? Why is it absolutely hounded out of the scientific community? It is test able, I don’t know what it is or why it is. 
I have been told all sorts of shit about it. That it will find pipes, etc. I am not trying to deal with any previously existing information. I want to gather scientific data about how or why the copper in my hands moved of it’s own accord. Was there a magnetic field, or is there another factor at play that I have not addressed? 
Why is it that any mention of anything like this brings out the crackpots as well? All I am trying to do is get scientific information about something I have observed. Why is it that we aren’t allowed to address things like this?
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scifigeneration · 5 years ago
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New technologies to recycle electronic waste
by Jean-Christophe P. Gabriel
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Pulsed extraction column (normally positioned vertically). JCP Gabriel, CEA Marcoule DES/ISEC/DMRC
Our connected consumer society generates a lot of electronic waste, around 50 million tonnes per year worldwide. It is even currently the waste that shows the strongest growth from one year to the next. The value of the raw materials included in this waste is estimated at 50-60 billion euros, depending on materials prices. Legislation and recycling channels for this waste are organised in many countries, thanks to extended producer responsibility systems, but currently only 20% is recycled in a certified process . In addition, of the sixty chemical elements present in electronic waste, only a minority is recycled, ten in number_: gold, silver, platinum, cobalt, tin, copper, iron, aluminium and lead). Everything else ends up _ in fine_ wasted in landfills.
The ideal, from the point of view of the circular economy, would be on the one hand to prolong as much as possible the lifespan of these electronic devices, in particular by prolonging the first use, and on the other hand to facilitate and favour reuse or repair. The fact remains that these landfills represent real “urban mines”: potential deposits for those who know how to exploit them.
How do we deal with electronic waste?
Recycling electronic waste means separating materials, molecules or chemical elements, so that they can be sold as raw materials for the manufacture of new products. First you have to dismantle the devices and components, sort them, grind them, and finally separate the materials, most often by incineration and then by solution based chemical processes.
Getting more chemicals from the urban mine is easier said than done. Electronic waste is very varied in nature and is often mixed with other types of wastes. The composition of the waste to be treated therefore varies from one shovel of waste incinerator’s ash or from one batch of waste to another. This contrasts with the exploitation of a “traditional” mine where the composition of the ore is much simpler and constant, at least in comparison.
The chemist is faced with an extremely complex separation problem. This partly explains why the recycling industry is currently focusing on the most concentrated or economically attractive metals to recover, hence the list above.
New strategy: dismantle, sort, grind, dissolve
Sorting aims to minimize the chemical complexity of the mixture to be treated, as well as its variability. It can be done at all scales: that of the device (type, generation), of its modules (printed circuits, batteries, external envelopes, frames, etc.), of their elementary electronic components (cables, resistances, capacities, chips, bare boards etc.), or even at the level of the powder resulting from grinding, which can be carried out on all the scales described.
The complete disassembly of devices is theoretically the most effective approach. But, due to the multiplicity and complexity of equipment, it’s difficult to automate this step: disassembly is still mainly carried out manually, which means that its cost is often too high to allow sorting down to the level of the elementary components.
Consequently, the most common approach among recyclers (MTB, Paprec, Véolia), before any chemical treatment, is the grinding at the scale of the device or its modules, followed by steps of separation of the particles by physical methods using the differences in densities or magnetic properties. Depending on the purity of the powders obtained, thermal or chemical treatments are then used to refine the composition of the final products.
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Pulsed extraction column, 5 cm diameter. JCP Gabriel, CEA Marcoule DES/ISEC/DMRC, Author provided
In the latter case, the most used process of separation in solution of chemical elements is the so-called liquid-liquid extraction. It usually consists first of dissolving the metals or their oxides in an acid (for example nitric acid), then making an emulsion, that is to say the equivalent of a French vinaigrette. The acid solution (“vinegar”) is vigorously mixed with an organic solvent (such as kerosene, “oil”) in an extraction column and one or more molecules (“mustard”) having the property of promoting the transfer of certain metals (“flavours”) from acid to solvent. As this separation step is rarely perfect, it is repeated in series in order to reach the desired purity levels. Several dozen, even several hundred, successive extractions are sometimes necessary to achieve the desired purity.
Optimising the costs and efficiency of such processes requires the study of the influence of a very large number of parameters (for example, the concentrations of chemical species, acidity, temperature, etc.) in order to define the combination which represents the best compromise.
New processes to increase the recycling rate
In the laboratory SCARCE, we are working on new processes which will ultimately allow “ increase the number of chemical elements recycled and increase their recycling rates: on the one hand with mechanical processes (automation of disassembly and sorting), on the other hand with chemical extraction processes in solution.
For example, as we have seen, the chemical composition of electronic waste is very variable. The development of an extraction process, for a specific chemical composition, can easily take five to ten years of research and optimization and the adaptation of an existing process to a new composition (for example a new metal) requires several months to several years. This is hardly compatible with the volumes of waste, the resources and the time available for recycling waste.
Microscopic piping to optimize the extraction of elements
To reduce the time and cost of developing new extraction processes, we have miniaturized and integrated in a single device microfluidics automated all the equipment necessary for a process study. In a microfluidic device, the piping is smaller than a millimetre (in our case 100 µm thick, the thickness of two hairs or less). This allows very small amounts of material to be used: a few microliters of solvents and acids instead of millilitres, and a few milligrams of chemical compounds instead of grams. With the integration of analysis methods (X-rays, infrared and sensors), we can study the different combinations of parameters continuously, automatically and quickly. This allows us to do a study in a few days which can normally take up to several months.
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Elemental component of the 5 cm side extraction microfluidic chip. Fluids flow through the half-pipe in a zigzag pattern and the chemical elements pass through a membrane sandwiched between two such components. The piping, pumps and analysis modules, e.g. infrared, are added. A. El Mangaar, JCP Gabriel, CEA, Author provided
Additional advantage of microfluidics compared to a conventional device: we better understand the phenomena of transfers of chemical elements at the interface between water and oil. Indeed, we control both the exchange surface between water and oil thanks to the use of a porous membranes, as well as the contact time between the two phases, which are pushed into the microfluidic channels using computer controlled syringe pumps. Material flows can then be calculated precisely.
Recovery of rare earths: precious and little recycled materials
This approach recently allowed us to study the extraction of strategic metals found in mobile phones. These metals, essential in modern technologies, are produced mainly in China and are little recycled at present – under 5%. This is all the more unfortunate as their production is very expensive and can pose societal and environmental problems.
Our results show that the combination of two specific extracting molecules makes it possible to extract rare earths with an efficiency almost 100 times greater than the efficiency of extractions with the molecules used separately. In addition, we have demonstrated efficient extraction at acid concentrations 10 to 100 times lower than those used in industry, which generates less pollution. We have also identified combinations of parameters that make it possible to separate the rare earths much more efficiently from each other, which is conventionally very difficult to achieve in a few steps. We are now studying the transposition of these results, obtained on a very small scale, to that of the industrial production tool.
Finally, our microfluidic approach is modular which means that each of the modules can find its usefulness in other cases, for example, the liquid-liquid extraction module can be useful for the study of processes of extraction of organic molecules (essential oils); or the infrared spectroscopy module for online monitoring of agrifood or pharmaceutical processes. It allows you to determine the amount of unbound water – it is the water that surrounds the molecules that are dissolved in it, but that do not interact with them, a key parameter to follow in many formulations of these industries.
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About The Author:
Jean-Christophe P. Gabriel, Directeur de Recherche au CEA (IRAMIS/NIMBE de Saclay) et Professeur invité à NTU/ERI@N (Singapour), Commissariat à l’énergie atomique et aux énergies alternatives (CEA)
This article is republished from our content partners over at The Conversation under a Creative Commons license. 
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thesilverwitch · 7 years ago
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HOW CRYSTAL MAGIC WORKS
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No one can yet say categorically how crystals work, although there have been many suggestions based on vibrational resonance and the water and crystalline content of the human body.
Michael Gienger postulates that the power of a crystal to generate light interacts with the cells of the physical body. What is clear is that crystals have an energy field that interacts with any other energy field near it. The interaction of the energy field of a crystal and a human being can, for example, be photographed with a Kirlian camera.
At the simplest level, many crystals contain traces of therapeutic minerals that pass across the skin barrier to bring about physiological changes. Kunzite, as already mentioned, contains lithium, which is used by doctors to medicate depression and bipolar disorders. Crystal users hold Kunzite or place it on their heart and feel uplifted.
Similarly the copper content in Malachite alleviates arthritic discomfort – although too much is toxic. It’s a matter of maintaining the balance. However, as Michael Gienger puts it, crystals are actually an information system that radiates energy. Find the right information, and the correct crystal carrier, and the body will be brought back into balance.
As we have seen, crystals have an orderliness of structure at the molecular level, with each molecule vibrating at the same rate as all the others. Synchronization takes place so that all the units within the crystal – and every other crystal of the same type – vibrate in unison (a harmonic convergence). Each crystal type has its own fundamental frequency or harmonic note. This creates a coherent, resonant system with a stable frequency template.
Coherent systems are difficult to disrupt. Even if there is disharmony or discord nearby, their energy remains stable – and can restore equilibrium to the disrupted energy.
Crystal energy is shaped, amplified and discharged from a crystal’s termination and goes out rather like ripples in a pond, creating a rhythmic pattern that pulses in harmony. The basic template can be modified or directed by other energy, such as magnetism, color waves, intention or the power of thought, passing through it.
Scalar waves may well be the mechanism through which all energetic healing is effected. We’ll get to that in a moment.
EVERYTHING IS ENERGY
At the most basic level, everything is energy. How it manifests is simply a matter of vibrational frequency and the crystalline structure (organic or inorganic) that enfolds it. The human body is no exception. It is a conductive energy system with crystalline structures in and around the blood, lymph and cells and it is repaired and maintained by a complex electrochemical system.
In other words, it runs on vibrations.
This is not only with regard to physiological processes. Emotions and thoughts also have their own vibration (see the work of Bruce Lipton and Valerie Hunt), which go out of kilter during stress and can distort an internal crystal lattice in the body.
Through resonance and entrainment, crystals can restore equilibrium to us. But there is more to it than this. Crystal healing works at a distance. A subtle electromagnetic current passes between a crystal and a person whether or not they are in physical contact. What links and activates them is, I believe, consciousness and intention.
UNIFIED FIELD THEORY
Einstein coined the term ‘uniform field theory’ when trying to find an overall system that would link all the known forces in the universe with fundamental particle physics. But thousands of years before that the Hindu text the Mundaka Upanishad declared:
‘The sparks, though of one nature with the fire, leap from it, uncounted beings leap from the Everlasting, but these, my son merge into It again. The Everlasting is shapeless, birthless, breathless, mindless, above everything, outside everything, inside everything.’
This description sounds exactly like the universe from the perspective of a quantum physicist or a modern mystic such as the systems theorist Ervin Laszlo, who says: ‘The primary “stuff” of the universe is energy and not matter, and space is neither empty nor passive – it’s filled with virtual energies and information.’ This also describes crystal energy.
CONSCIOUSNESS: RIDING THE CREST OF A WAVE
Quantum physics suggests energy is not continuous but rather exists as packets of energy – energy that behaves like particles and yet acts like a wave.
Theoretical quantum physicist Dr. Fred Alan Wolf suggested that consciousness was a huge oceanic wave:
‘Consciousness is a huge oceanic wave that washes through everything, and it has ripples and vibrations in it. When there are acts of consciousness, the wave turns into bubbles at that moment, it turns to froth.’
He pointed out that everything, human beings included, was composed of quantum ‘froth’ and that under an electron microscope we would see:
‘A rather bizarre-looking light show, of things popping on and off, vanishing and reappearing, matter created out of nothing and then vanishing. And in that vanishing and creation, an electromagnetic signal is piped from one point to another point.’
This perfectly describes how I perceive crystal energy moving from a crystal to a body, or going out into the future to bring back information (in quantum physics, particles of energy move forward and backward, see below), or entraining two energy fields.
ENTRAINMENT
Entrainment is an energetic interaction. It is defined as ‘the synchronization of two or more rhythmic cycles’. In conventional entrainment, a smaller energetic field takes on the characteristics of a larger field, but this works both ways, and the larger field can take on the characteristics of the smaller, especially when directed by intention.
So, the crystalline structures in the body, especially its flowing tides of blood, lymph, intercellular and synovial fluid, can be entrained into a more perfect energy pattern.
Time and distance have no relevance here. Research has shown that the brainwaves of a healer and the recipient synchronize, or entrain, no matter what the distance. The same may well be true of crystals.
A crystal’s pulsing energy field has perfect equilibrium and its sympathetic resonance stabilizes a larger field through the energetic synchronization of two crystalline structures.
QUANTUM CRYSTALS
Quantum physics has demonstrated that simultaneous transfer of energy is possible. A particle can be in one place and in another at the same time and thought has an instantaneous effect over vast distances. So it seems feasible that crystal energy can travel from a crystal to the recipient.
It is my belief that what unifies and pervades the quantum and the crystal field is consciousness, which is present in and around everything in the universe. Although consciousness studies are increasing, research has not yet turned its attention to crystal consciousness.
BIOSCALAR WAVES
Research has, however, been conducted into bioscalar waves. A bioscalar wave is a standing energy field created when two fields interact from different angles and counteract each other so that the field reverts to a ‘static state of potentiality’.
Research scientist and Professor Emeritus of Physiological Science at UCLA Dr. Valerie V. Hunt says that bioscalar waves are ‘alive with checked and balanced energies that cancel each other out so that they cannot be measured or evaluated by the instruments in current use’. It is, she says, a ‘strong, huge, and yet passive [force]... Only its effects tell us that it exists in space and has power.’
Laser therapy specialist Kalon Prensky describes a scalar wave as ‘a non-linear, non-Hertzian, standing wave capable of supporting significant effects including carrying information and inducing higher levels of cellular energy, which greatly enhances the performance and effectiveness of the body and immune system.
Additionally, it helps to clear cellular memory by shifting polarity, similar to erasing the memory of a cassette tape with a magnet.’ He states that ‘Scalar Waves travel faster than the speed of light and do not decay over time or distance.’ This sounds very much like crystal energy, and depictions of scalar waves look incredibly similar to the crystal energy perceived by a Kirlian camera or the intuitive eye.
Many of the newer crystals such as Anandalite, Que Sera, Quantum Quattro and Rainbow Mayanite contain concentrated bioscalar energy. All healing crystals probably have this energy within their matrix and generate it through their crystalline structure.
If, as subtle energy researcher Lilli Botchis asserts, ‘When the human body enters a scalar wave field, the electromagnetic field of the individual becomes excited [and] this catalyzes the mind/body complex to return to a more optimal state that is representative of its original, natural, electrical matrix form,’ we can see how a crystal with its optimal energy pattern might operate on the human – and planetary – energy body.
THE EFFECT OF BIOSCALAR WAVES
Research suggests that bioscalar waves assist cell membranes in switching on the most beneficial genetic functions and switching off detrimental patterns encoded within DNA. It has been demonstrated that they directly influence tissue at the microscopic level, bringing about a healing balance.
They have been shown to enhance the immune and endocrine systems, stabilize chemical processes, improve the coherence of the biomagnetic field and accelerate healing at all levels. They also release stored emotions and ingrained thoughts from the cellular structures of the body, removing a root cause of psychosomatic dis-ease. Exactly what is claimed for crystal energy and crystal healing.
INTEGRATED HOLISTIC HEALING
Points to consider:
Only one thousand millionth part of our body is matter. The rest is energy.
Water is a crystalline structure.
The human body is around 57 percent water, and that water is found in every part of the body, therefore the human body is crystalline.
Crystals generate, store and radiate energy.
Quantum physics describes energy as controlling
matter.
Fundamental particles such as electrons influence each other at a considerable distance.
Each individual crystal carries the energetic resonance of the crystal type, no matter where in the world it may be.
Everything is interconnected in such a way that the smallest piece contains the properties of the whole (the holographic universe).
So it would appear that crystal healing works by bringing back into equilibrium all the separate elements of the body, utilizing universal energetic forces that are encoded into the crystals.
The information field of a crystal interacts with that of a human being or a particular environment, with each part influencing the other. This can work at a distance, powered by intention and consciousness.
In other words, as Professor John Wheeler puts it, ‘In some strange sense the quantum principle tells us that we are dealing with a participatory universe.’
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narcisbolgor-blog · 7 years ago
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The helium shutoff — a side effect of the Qatar confrontation
(CNN)The recent diplomatic dustup between Qatar and many other Gulf nations caused some nervousness for some of the world's most cutting edge scientists.
Among recalled ambassadors, closed borders and massive disruptions on travel and shipping, the diplomatic crisis highlighted the world's vulnerability to cutoffs in the supply of helium, since Qatar is the world's second-biggest producer of the vital substance, after the United States. Although the helium aspect of this diplomatic imbroglio has been resolved, it highlights the way in which international diplomacy can impact scientific research.
While most people might think of helium as simply being the gas that is used for balloons at children's birthday parties, it is actually a critical ingredient for some of the highest technologies on Earth.
It is used in cryogenic environments, like the operation of medical MRI (magnetic resonance imaging) and NMR (nuclear magnetic resonance) spectrometers. It is used to purge and pressurize containers made of materials that cannot withstand chemical interactions.
It is used to provide controlled environments for the manufacture of solid-state computer chips. And it is used in tungsten gas welding for such metals as aluminum and copper, which would experience much weaker welds if they were contaminated by exposure to oxygen.
Helium is chemically inert and unique in its ability to remain liquid at temperatures below -450 F (-269 C). It is found in air at low concentrations (about five parts per million) -- a concentration that does not economically allow for easy extraction.
In fact, helium is mostly obtained from natural gas deposits, like the South Pars/North Dome field, which is a natural gas condensate field shared by Iran and Qatar. Qatar stopped helium production on June 13 and only resumed operations on July 2. Had production not been resumed, the impact on scientific research could have been quite worrisome.
Helium is produced in radioactive alpha decay of minerals bearing either uranium or thorium, both of which are radioactive elements. Alpha decay is the emission of the nucleus of a helium atom. The same sort of geological processes that trap natural gas underground will also trap helium. The concentrations of helium in natural gas deposits vary widely, ranging from a few parts per million to as much as 7% at a small gas field located in New Mexico.
Qatar, with an area smaller than that of Connecticut, produces 25% of the world's helium and the recent diplomatic crisis strongly reduced its ability to ship this valuable commodity.
While the country can still ship natural gas via special facilities near Ras Laffan Industrial City in the north part of the country, helium is normally shipped overland through Saudi Arabia to the Jebel Ali port in the United Arab Emirates. With this shipping route blocked, the helium liquefication facilities inside Qatar were effectively shut down on June 13.
The necessary helium shipping containers are essentially very large thermos bottles, which eventually warm up when they are emptied. Since the containers were located at the customer's site and not quickly returned to the producer's facility, they warmed and were easily contaminated with air. At liquid helium temperatures, more common gasses are frozen solid; thus a small contamination by ordinary air can form solid blockages in helium transfer pipes. Restarting the cooling plant and reconditioning shipping containers is a very delicate and time-consuming business.
The world's scientific and technical community needs reliable helium supplies and each facility usually stores locally only a few weeks' worth of liquid helium consumption. However, once their reserves are depleted, they become very concerned about how long a reduction in production caused by disruptions like this blockade of Qatar is going to last.
When the helium supply becomes very scarce, this hits medical and scientific users particularly hard. Helium rationing has no system for prioritization; medical facilities do not get special access to the remaining reserves. What drives the distribution in a rationing environment is individual contracts. Previous helium production reductions saw some facilities having their supply reduced by half.
The vulnerability of the world's helium supply is not a new thing. The United States formed an enormous helium reserve in 1925 just outside Amarillo, Texas, in part to ward off situations exactly like those caused by the Qatar blockade. However, in 1996, financial and political pressures led the US government to direct that the helium reserve be sold on the open market by 2006. The reduction of the reserve led to market forces driving the prices of this critical element, further leading to periodic shortages for the scientific community.
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So, what should we do to avert future crises like that posed by the Qatar blockade? The first is to continue to further develop existing helium recapture technologies. Although these technologies exist, many existing facilities simply use helium to cool something or as part of their production process and then vent the helium gas to the atmosphere.
Helium's inertness makes this safe, but it is wasteful. If more companies and laboratories would capture the gas and liquefy it, they could recapture the cost of the capture facilities in just a few years. It would also guard against vulnerabilities to shortages caused by geopolitical problems like the Qatar diplomatic crisis.
And, although the world's helium reserves have not been depleted, it is a nonrenewable resource. When it's gone, it's gone. That's true of many substances, but with helium, things are different. There is no known substance that can replace it.
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The helium shutoff — a side effect of the Qatar confrontation was originally posted by 11 VA Viral News
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josephkitchen0 · 7 years ago
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What is Tempera Paint? How Eggs Shaped Art History
What came first, the chicken portrait or the egg paint? What is tempera paint and how did it illuminate a colorful history through art and architecture?
Tinúviel Sampson sits before a gesso-coated wood panel in southern Maine, brush in hand. Her models strut on three acres outside: Faverolles, Spitzhaubens, and Muscovies. Bristles dip into a mixture of water, pure artists’ pigment, and yolks collected from her own coop. Pictures take shape. First, she paints an outline then fills in delicate feathers, combs, and beaks.
Though Tinúviel’s folksy style of painting poultry is relatively new, the medium itself reigned from the Classical world, and through medieval times, until oil painting replaced it in Italy around 1500 AD. The Birth of Venus, by Sandro Botticelli, was painted with tempera, as were all surviving panel paintings done by Michaelangelo.
What is Tempera Paint?
Tempera’s definition: A technique which combines an emulsion of egg, or another binding ingredient, with pigment and water, to create colorful paint. Though other binders may include glue, honey, or milk, the most common is pure egg yolk. Historical painters ground pure pigments, often from natural minerals, and mixed in binder and just enough water to create a good consistency.
It’s theorized that ancient Greeks used egg as a paint binder; possibly the Egyptians, as well. Museums often label historical art as “tempera,” which makes it difficult to know if the binder was egg. Carlo Crivelli painted exclusively in tempera but the exact technique is undefined. Though some funerary portraits contain lipid bases with fatty acid patterns similar to egg binder, the earliest proven egg tempera painting is a mummy portrait from the 4th century AD. The first egg tempera recipes weren’t written until ca. 1400, by Cennino Cennini. This long-enduring technique fell into near-obscurity when oil paints entered the artists’ scene not long afterward, allowing for richer colors and flexible pictures on canvas.
Almost all Tinúviel’s processes are traditional. She learned how to make tempera paint from famed professor Panos Ghikas at the Massachusetts College of Art, in Boston. The course focused on traditional painting materials and techniques, where she learned how to make her own oil paints, egg tempera, mediums, and formulae. But, though Tinúviel started out with oil painting, she soon leaned on egg tempera. On her website, she showcases her artwork and discusses the historical technique.
“The big difference is it dries immediately as you’re painting, so it’s a very different kind of technique.”
Photo by Tinuviel Sampson
Tinúviel loves the vibrant colors and the way they interact with gesso to create a rich, glowing quality. Egg tempera dries to a very matte finish. It’s not a chalky matte, she explains; egg tempera has a low-key sheen to its own. But to make egg tempera shiny, cover the dried paint with a classic oil varnish such as Damar. Shellac can also be used, though it can yellow with age.
As many poultry owners know, after cleaning up broken chicken eggs that oozed and dried on other eggs, yolk hardens and doesn’t come off easily. Egg benefits which allow paint to last for centuries also don’t allow much flexibility. Egg tempera must be applied to rigid boards; traditionally, oak or poplar panels. Tinúviel uses MDF panels purchased at hardware stores. She prepares them with traditional rabbit hide glue and gesso.
Professional artists’ pigment powders mix with pure, homegrown yolk and water. Natural pigments may be made from crushed minerals or organic sources such as plants or bone; modern pigments, such as Prussian blue, are synthetic. Though official recipes advise using distilled water for paints, she finds her well water works just fine. She advises against municipal water because it often has added chemicals which may react with either yolk or pigments. For instance, orpiment yellow pigment reacts with copper, which may be present in water flowing through city pipes. As far as the yolk, Tinúviel has the advantage of the freshest eggs, which allow the yolk to separate easier from the white.
“Not only do I have a flock of chickens as my models,” she says, “I have a ready supply of eggs in the backyard for my painting medium.”
Tinuviel and Moggie
Her three-acre property boasts heritage breeds (and a few feathered mutts) but she doesn’t restrict herself to her own fowl. Fans often email pictures of their birds for her to paint. She takes thousands of pictures at poultry shows and views website after website of online photos. Many folk artists create paintings of roosters but don’t focus on particular breeds. Tinúviel says, “I really like the idea of having a well-painted representation of the birds that are out there.”
One day, at Great Works Feed Supply, her local feed store, she showed off pictures of her paintings. The store offered to display and sell prints if she made them. “They gave me the nudge I needed to put my work out to the public,” she says. Chicken folk love their chickens, the staff said, so she should bring her work there to sell it. That led to a small artists’ business where she creates prints and magnets, selling them in the gallery called Just Us Chickens.
What is tempera paint to the world? To art history fans, it’s a forgotten technique that lines a few choice museums. For Tinúviel, it’s a rejuvenated passion that connects her talents with the backyard birds that served as original inspiration.
What is Tempera Paint? How Eggs Shaped Art History was originally posted by All About Chickens
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ralphmorgan-blog1 · 7 years ago
Text
The helium shutoff — a side effect of the Qatar confrontation
(CNN)The recent diplomatic dustup between Qatar and many other Gulf nations caused some nervousness for some of the world's most cutting edge scientists.
Among recalled ambassadors, closed borders and massive disruptions on travel and shipping, the diplomatic crisis highlighted the world's vulnerability to cutoffs in the supply of helium, since Qatar is the world's second-biggest producer of the vital substance, after the United States. Although the helium aspect of this diplomatic imbroglio has been resolved, it highlights the way in which international diplomacy can impact scientific research.
While most people might think of helium as simply being the gas that is used for balloons at children's birthday parties, it is actually a critical ingredient for some of the highest technologies on Earth.
It is used in cryogenic environments, like the operation of medical MRI (magnetic resonance imaging) and NMR (nuclear magnetic resonance) spectrometers. It is used to purge and pressurize containers made of materials that cannot withstand chemical interactions.
It is used to provide controlled environments for the manufacture of solid-state computer chips. And it is used in tungsten gas welding for such metals as aluminum and copper, which would experience much weaker welds if they were contaminated by exposure to oxygen.
Helium is chemically inert and unique in its ability to remain liquid at temperatures below -450 F (-269 C). It is found in air at low concentrations (about five parts per million) -- a concentration that does not economically allow for easy extraction.
In fact, helium is mostly obtained from natural gas deposits, like the South Pars/North Dome field, which is a natural gas condensate field shared by Iran and Qatar. Qatar stopped helium production on June 13 and only resumed operations on July 2. Had production not been resumed, the impact on scientific research could have been quite worrisome.
Helium is produced in radioactive alpha decay of minerals bearing either uranium or thorium, both of which are radioactive elements. Alpha decay is the emission of the nucleus of a helium atom. The same sort of geological processes that trap natural gas underground will also trap helium. The concentrations of helium in natural gas deposits vary widely, ranging from a few parts per million to as much as 7% at a small gas field located in New Mexico.
Qatar, with an area smaller than that of Connecticut, produces 25% of the world's helium and the recent diplomatic crisis strongly reduced its ability to ship this valuable commodity.
While the country can still ship natural gas via special facilities near Ras Laffan Industrial City in the north part of the country, helium is normally shipped overland through Saudi Arabia to the Jebel Ali port in the United Arab Emirates. With this shipping route blocked, the helium liquefication facilities inside Qatar were effectively shut down on June 13.
The necessary helium shipping containers are essentially very large thermos bottles, which eventually warm up when they are emptied. Since the containers were located at the customer's site and not quickly returned to the producer's facility, they warmed and were easily contaminated with air. At liquid helium temperatures, more common gasses are frozen solid; thus a small contamination by ordinary air can form solid blockages in helium transfer pipes. Restarting the cooling plant and reconditioning shipping containers is a very delicate and time-consuming business.
The world's scientific and technical community needs reliable helium supplies and each facility usually stores locally only a few weeks' worth of liquid helium consumption. However, once their reserves are depleted, they become very concerned about how long a reduction in production caused by disruptions like this blockade of Qatar is going to last.
When the helium supply becomes very scarce, this hits medical and scientific users particularly hard. Helium rationing has no system for prioritization; medical facilities do not get special access to the remaining reserves. What drives the distribution in a rationing environment is individual contracts. Previous helium production reductions saw some facilities having their supply reduced by half.
The vulnerability of the world's helium supply is not a new thing. The United States formed an enormous helium reserve in 1925 just outside Amarillo, Texas, in part to ward off situations exactly like those caused by the Qatar blockade. However, in 1996, financial and political pressures led the US government to direct that the helium reserve be sold on the open market by 2006. The reduction of the reserve led to market forces driving the prices of this critical element, further leading to periodic shortages for the scientific community.
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So, what should we do to avert future crises like that posed by the Qatar blockade? The first is to continue to further develop existing helium recapture technologies. Although these technologies exist, many existing facilities simply use helium to cool something or as part of their production process and then vent the helium gas to the atmosphere.
Helium's inertness makes this safe, but it is wasteful. If more companies and laboratories would capture the gas and liquefy it, they could recapture the cost of the capture facilities in just a few years. It would also guard against vulnerabilities to shortages caused by geopolitical problems like the Qatar diplomatic crisis.
And, although the world's helium reserves have not been depleted, it is a nonrenewable resource. When it's gone, it's gone. That's true of many substances, but with helium, things are different. There is no known substance that can replace it.
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raburcke · 11 years ago
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HOW CAN A COPPER PIPE INTERACT WITH A MAGNET?
HOW CAN A COPPER PIPE INTERACT WITH A MAGNET?
From memolition.com:
Magnets are not attracted to copper, but incredibly strong magnets interact with copper in a pretty amazing way. If you drop a neodymium magnet down through a copper pipe it’s descent is slowed. The stronger the magnet and the thicker the pipe, the slower the fall. Take a look.
This is an excellent demonstration of Lenz’s law and eddy currents. If you’re not familiar with Len…
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