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Biochip Measures Glucose in Saliva, Not Blood

By Guest PostJanuary 22, 2012Sciencealec roelke, americans, biochip, biological device, blood, brown university, chip, convergence, diabetics, domenico pacifici, environmental substances, glucose concentration, glucose levels, grooves, human hair, human saliva, interaction of electrons, interference, jing feng, light, light intensity, maxima and minima, measure, microfluidic channels, milligrams per deciliter, Nanotechnology, ocean waves, photons, plasmonic interferometers, steve rhieu, surface plasmon polariton, surface plasmon waves, surface plasmonics, tayhas palmore, vihang mehta, vince siu, wavelength

*Engineers at Brown University have designed a biological device that can measure glucose concentrations in human saliva. The technique could eliminate the need for diabetics to draw blood to check their glucose levels. The biochip uses plasmonic interferometers and could be used to measure a range of biological and environmental substances. Results are published in Nano Letters.*

PROVIDENCE, R.I. [Brown University] — For the 26 million Americans with diabetes, drawing blood is the most prevalent way to check glucose levels. It is invasive and at least minimally painful. Researchers at Brown University are working on a new sensor that can check blood sugar levels by measuring glucose concentrations in saliva instead.

The technique takes advantage of a convergence of nanotechnology and surface plasmonics, which explores the interaction of electrons and photons (light). The engineers at Brown etched thousands of plasmonic interferometers onto a fingernail-size biochip and measured the concentration of glucose molecules in water on the chip. Their results showed that the specially designed biochip could detect glucose levels similar to the levels found in human saliva. Glucose in human saliva is typically about 100 times less concentrated than in the blood. (more…)

Energy Drinks: To Drink or Not to Drink?

By PravdaJanuary 19, 2011Culture, Healthalcohol, asia, blood, caffeine, carbohydrates, carbonated, coffee, denmark, depression, dietrich matesic, diuretic effect, energy drinks, france, glucose, glucuronolactone, heart diseases, high blood pressure, high sugar levels, hong kong, hypertension, hypertensive crisis, increased anxiety, ingredients, mental activity, miracle drink, nervous breakdown, nervous system, norway, overdoses, oxidative processes, psychomotor agitation, red bull, stimulant, stimulate, tachycardia, taurine, tea, vitamins, vodka, workaholics

Energy drinks are a recent invention of mankind, even though their ingredients have long been used to stimulate the nervous system. They have become the salvation for students during the exams and office workers that have to meet the deadlines. Yet, are these products as good as they seem? (more…)

Dangerous Chemicals in Food Wrappers Likely Migrating to Humans

By Guest PostNovember 14, 2010Culture, Healthblood, chemical contamination, chemicals, fast food, food, human blood, human chemical exposure, humans, jessica d’eon, junk food wrappers, metabolism, microwave popcorn bags, pap concentrations, paps, perfluorinated carboxylic acids, perfluorooctanoic acid, pfcas, pfoa, polyfluoroalkyl phosphate esters, scott mabury

Image credit: University of Toronto

U of T scientists have found that chemicals used to line junk food wrappers and microwave popcorn bags are migrating into food and being ingested by people where they are contributing to chemical contamination observed in blood.

Perfluorinated carboxylic acids or PFCAs are the breakdown products of chemicals used to make non-stick and water- and stain-repellant products ranging from kitchen pans to clothing to food packaging. PFCAs, the best known of which is perfluorooctanoic acid (PFOA), are found in humans all around the world.

“We suspected that a major source of human PFCA exposure may be the consumption and metabolism of polyfluoroalkyl phosphate esters or PAPs,” said Jessica D’eon, a graduate student in the Department of Chemistry. “PAPs are applied as greaseproofing agents to paper food contact packaging such as fast food wrappers and microwave popcorn bags.” (more…)

Scary Chupacabras Monster is as Much Victim as Villain

By Guest PostOctober 22, 2010Culture, Sciencebarry oconnor, blood, chupacabras, chupacabras syndrome, coyotes, creepy crawlies, dogs, evil looking animals, evolutionary history, foxes, goatsucker, halloween, hans klompen, itchy rash, legendary beast, livestock, mange, monsters, puerto rico, sarcoptes scabiei, scabies, tales, wolves

ANN ARBOR, Mich.— As Halloween approaches, tales of monsters and creepy crawlies abound. Among the most fearsome is the legendary beast known as the chupacabras.

But the real fiend is not the hairless, fanged animal purported to attack and drink the blood of livestock; it’s a tiny, eight-legged creature that turns a healthy, wild animal into a chupacabras, says University of Michigan biologist Barry OConnor. (more…)

Tag Archives: blood

Biochip Measures Glucose in Saliva, Not Blood

Energy Drinks: To Drink or Not to Drink?

Dangerous Chemicals in Food Wrappers Likely Migrating to Humans

Scary Chupacabras Monster is as Much Victim as Villain