Wednesday, February 19, 2014
Tuesday, February 18, 2014
Health Matters: Your craving may be your addiction - Opinion - WKU Herald
When you first take a bite of sugary cereal, your taste receptors that respond to sweetness, found at the tip of your tongue, send a signal to the portion of your brain called the cerebral cortex.
This signal activates ‘the reward system’ and causes you to want to take another bite. Excessive activation of this reward system, Dr. Avena suggests, can cause ‘loss of control, craving and intolerance to sugar.’
Monday, February 17, 2014
Brilliant deduction
... We went into the garden, & drank tea under the shade of some
appletrees, only he, & myself. amidst other discourse, he told me, he
was just in the same situation, as when formerly, the notion of
gravitation came into his mind. "why should that apple always descend
perpendicularly to the ground," thought he to him self: occasion'd by
the fall of an apple, as he sat in a comtemplative mood: "why should
it not go sideways, or upwards? but constantly to the earths centre?
assuredly, the reason is, that the earth draws it. there must be a
drawing power in matter. & the sum of the drawing power in the matter
of the earth must be in the earths centre, not in any side of the
earth. therefore dos this apple fall perpendicularly, or toward the
centre. if matter thus draws matter; it must be in proportion of its
quantity. therefore the apple draws the earth, as well as the earth
draws the apple."
http://en.m.wikipedia.org/wiki/Isaac_Newton
appletrees, only he, & myself. amidst other discourse, he told me, he
was just in the same situation, as when formerly, the notion of
gravitation came into his mind. "why should that apple always descend
perpendicularly to the ground," thought he to him self: occasion'd by
the fall of an apple, as he sat in a comtemplative mood: "why should
it not go sideways, or upwards? but constantly to the earths centre?
assuredly, the reason is, that the earth draws it. there must be a
drawing power in matter. & the sum of the drawing power in the matter
of the earth must be in the earths centre, not in any side of the
earth. therefore dos this apple fall perpendicularly, or toward the
centre. if matter thus draws matter; it must be in proportion of its
quantity. therefore the apple draws the earth, as well as the earth
draws the apple."
http://en.m.wikipedia.org/wiki/Isaac_Newton
Isaac Newton - Wikipedia, the free encyclopedia
In 1704, Newton published Opticks, in which he expounded his corpuscular theory of light. He considered light to be made up of extremely subtle corpuscles, that ordinary matter was made of grosser corpuscles and speculated that through a kind of alchemical transmutation "Are not gross Bodies and Light convertible into one another, ...and may not Bodies receive much of their Activity from the Particles of Light which enter their Composition?
Friday, February 14, 2014
Thursday, February 13, 2014
Monday, February 10, 2014
Monday, February 3, 2014
Autism
‘Social symptoms in autistic children may be caused by hyper-connected neurons
The brains of children with autism show more connections than the brains of typically developing children do. What's more, the brains of individuals with the most severe social symptoms are also the most hyper-connected. The findings reported in two independent studies are challenge the prevailing notion in the field that autistic brains are lacking in neural connections.’
http://www.sciencedaily.com/releases/2013/11/131107123039.htm
‘Autistic brains create more information at rest, study show
New research finds that the brains of autistic children generate more information at rest -- a 42 percent increase on average. The study offers a scientific explanation for the most typical characteristic of autism -- withdrawal into one's own inner world. The excess production of information may explain a child's detachment from their environment.’
http://www.sciencedaily.com/releases/2014/01/140131130630.htm
Sunday, February 2, 2014
Fwd: Stem Cells
‘Researchers turn adult cells back into stem cells’
http://www.usatoday.com/story/news/nation/2014/01/29/stem-cells/5014349/
‘'Stem cells' created in less than 30 minutes in 'groundbreaking' discovery’
‘Groundbreaking discovery could pave way for routine use of stem cells in medicine’
Saturday, February 1, 2014
Fwd: Health and Air :)
'Cell cycle speed is key to making aging cells young again'
'
New catalyst to convert greenhouse gases into chemicals
Researchers have developed a highly selective catalyst capable of electrochemically converting carbon dioxide -- a greenhouse gas -- to carbon monoxide with 92 percent efficiency. The carbon monoxide then can be used to develop useful chemicals.'
Wednesday, January 29, 2014
Monarch Butterflies Falter Under Extreme Weather
http://www.nytimes.com/2014/01/30/us/monarch-butterflies-falter-under-extreme-weather.html
Tuesday, January 28, 2014
Saturday, January 25, 2014
Wednesday, January 22, 2014
Water
‘Scientists using the Herschel space observatory have made the first definitive detection of water vapor on the largest and roundest object in the asteroid belt, Ceres.
Plumes of water vapor are thought to shoot up periodically from Ceres when portions of its icy surface warm slightly. Ceres is classified as a dwarf planet, a solar system body bigger than an asteroid and smaller than a planet.
Herschel is a European Space Agency (ESA) mission with important NASA contributions.
"This is the first time water vapor has been unequivocally detected on Ceres or any other object in the asteroid belt and provides proof that Ceres has an icy surface and an atmosphere," said Michael Küppers of ESA in Spain, lead author of a paper in the journal Nature.’
http://www.sciencedaily.com/releases/2014/01/140122132535.htm
Sunday, January 19, 2014
Fwd: Catalyst
Another Photoelectrochemical Catalyst
'An improved, cost-effective catalyst for water-splitting devices
by Staff Writers
Lausanne, Switzerland (SPX) Jan 16, 2014
Publishing in Nature Communications, an EPFL-led team of scientists has found a method to create a high-efficiency, scalable solar water splitting device using cheap materials…
One of the most sustainable methods of producing hydrogen is photoelectrochemical (PEC) water-splitting. Solar energy is used to break water molecules into hydrogen and oxygen through a process called "hydrogen evolution reaction".
This reaction requires a catalyst, which is a chemical agent that increases its speed. In PEC water-splitting devices, a common catalyst used to split water is platinum, which is deposited on the surface of the solar panel's photocathode - the solar panel's electrode that converts light into electric current.
A research team at EPFL has now found a way to make efficient solar-powered water splitting devices using abundant and cheap materials. The group of Xile Hu developed a molybdenum-sulfide catalyst for the hydrogen evolution reaction, and the group of Michael Gratzel developed copper(I) oxide as a photocathode.
The researchers found that the molybdenum sulfide can be deposited on the copper(I) oxide photocathode for use in PEC water splitting through a simple deposition process that can be easily expanded onto a large scale.
The technique shows comparable efficiency to other hydrogen evolution reaction catalysts like platinum, it preserves the optical transparency for the light-harvesting surface and it shows improved stability under acidic conditions, which could translate into lower maintenance.
But more importantly, both the catalyst and the photocathode are made with cheap, earth-abundant materials that could greatly reduce the cost of PEC water-splitting devices in the future. According to senior author Xile Hu, the work represents a state-of-the-art example for solar hydrogen production devices.'
Friday, January 17, 2014
Fwd: Google contacts
'Google's smart contact lens: what it does and how it works
Wearables may be on everyone's list as the major tech trend of the year, but Google just kicked it up to a whole new level. The company announced a project to make a smart contact lens on its official blog Thursday.
But the lens isn't going to be used to deliver your e-mail straight into your skull — at least not yet. This project is working to tackle one of the biggest health problems facing the country today: diabetes.
The soft contact lens that Google's is introducing — it's still just a prototype — houses a sensor between two layers of lenses that measures the glucose levels in tears. The lens also features a small — really small — antenna, capacitor and controller, so that the information gathered from the lens can move from your eye to a device where that data can be read and analyzed.
According to a short explanation of the technology provided by Google, the chip and sensors are mounted on a small plastic-like film. A tiny pinhole in the lens lets tear fluid seep over the glucose monitor to get regular readings. Right now, the company said, it can get a level reading once every second.'
Since when did Google get into the medical devices business?
Wednesday, January 15, 2014
Fwd: Sugar/Liver
From: <larry.r.trout
'Nov. 1, 2013 — Despite current beliefs, sugar intake is not directly associated with nonalcoholic fatty liver disease, according to a new study in Gastroenterology, the official journal of the American Gastroenterological Association. Rather, high-calorie diets promote the progression of this serious form of liver disease.
Researchers conducted a double-blind study of healthy, but centrally overweight men to compare the effects of high intakes of two types of sugar, glucose and fructose, in two conditions -- weight-maintaining (moderate-calorie diet) and weight-gaining (high-calorie diet). In the weight-maintaining period, men on neither diet developed any significant changes to the liver. However, in the weight-gaining period, both diets produced equivalent features of nonalcoholic fatty liver disease, including steatosis (fatty liver) and elevated serum transaminase and triglycerides. These findings indicate that fructose and glucose have comparable effects on one's liver, and calorie intake is the factor responsible for the progression of liver disease.
"Based on the results of our study, recommending a low-fructose or low-glycemic diet to prevent nonalcoholic fatty liver disease is unjustified," said Professor Ian A. Macdonald, study author and faculty of medicine and health sciences, University of Nottingham, UK. "The best advice to give a patient is to maintain a healthy lifestyle with diet and exercise. Our study serves as a warning that even short changes in lifestyle can have profound impacts on your liver."'
http://www.sciencedaily.com/releases/2013/11/131101112406.htm
Wednesday, January 8, 2014
Re: Flow Battery
Could the liquid act as fuel for an electric car? A lot would depend upon the energy density.
<larry.r.trout> wrote:
'A team of Harvard scientists and engineers has demonstrated a new type of battery that could fundamentally transform the way electricity is stored on the grid, making power from renewable energy sources such as wind and solar far more economical and reliable…
The paper reports a metal-free flow battery that relies on the electrochemistry of naturally abundant, inexpensive, small organic (carbon-based) molecules called quinones, which are similar to molecules that store energy in plants and animals.'
http://www.sciencedaily.com/releases/2014/01/140108154238.htm
Friday, January 3, 2014
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