quinta-feira, 20 de dezembro de 2012

Holiday Spices Often Abused for Cheap Highs, Says Toxicologist

Dec. 17, 2012 — Watch your kitchen cupboards this season as thrillseekers look to common holiday baking ingredients for a rise -- cinnamon, nutmeg and even marshmallows are the primary ingredient in trendy risky behavior. "The envelope is always being pushed to create something new that will get attention, potentially create a drug-like effect and can pass under the radar of law enforcers," says Christina Hantsch, MD, toxicologist, Department of Emergency Medicine at Loyola University Health System.

Loyola recently treated a dozen pre-teen children in its emergency room. "A group of 9-year-olds were trying to do the Cinnamon Challenge and got caught," says Hantsch, who is a former medical director of Illinois Poison Control. "One girl had seen the videos on the Internet and wanted to try it with her friends." The Cinnamon Challenge involves trying to swallow one tablespoon of ground cinnamon without water. "The dry, loose cinnamon triggers a violent coughing effect and also a burning sensation that actually can lead to breathing and choking hazards," she said. Hundreds of videos and postings on the Internet have made it a social media sensation.

In 2011, poison centers received 51 calls about teen exposure to cinnamon. In the first three months of 2012, poison centers received 139 calls. The American Association of Poison Control Centers reports that of those, 122 were classified as intentional misues or abuse and 30 callers required medial evaluation.

Hantsch is concerned that what was once horseplay by older teenagers is now being copied by young children. "They have easy access to ingredients like cinnamon and marshmallows and think it is cool to do what their older peers are doing," says Hantsch.

Another challenge that continues to attract followers is called Chubby Bunny. "You stuff as many marshmallows in your mouth as possible and then try to say the words Chubby Bunny," explained Hantsch. "Two children have actually choked to death attempting this game so it is not to be taken lightly." Ground nutmeg has been snorted, smoked and eaten in large quantities to produce a marijuana-like high. "Nutmeg contains myristicin which is a hallucinogenic, like LSD," says the toxicologist. Other common household products that are also being abused are hand sanitizer, aerosol whipped cream, aerosol cooking spray, ink markers and glue.

"There actually is a synthetic marijuana called Spice, or K2, that is very popular right now because it cannot be detected in standard drug tests," says Hantsch. "Spice is popular right now because it is marketed as a legal high, which it is not, but is dangerous because it has more adverse effects than cannabis." The poison centers received 4,905 calls about exposure to K2 or Spice between Jan. 1 -- Nov. 30, 2012.

Respiratory, cardiac and nerve damage have all been documented in relation to substance abuse by users. "Seemingly silly games can have sinister effects and the holidays are the worst time for this to happen," says Hantsch. "Kids have more free time, greater access to the Internet and more opportunities to get together during vacations. And at Christmas, the kitchen pantry is loaded for holiday baking. Adults are wise to keep an eye on their children to make sure they are using the ingredients for their proper use."

The Loyola Department of Emergency Medicine is classified as a Level 1 Trauma Center, providing the highest level of surgical care to trauma patients. The department also has been recognized by groups such as The Joint Commission, the Commission on Accreditation of Medical Transport Systems, the American College of Surgeons (one of only two-ACS-verified trauma centers in Illinois)and the Illinois Department of Public Health for Trauma, Burns, Pediatric and Emergency departments.

Link:
http://www.sciencedaily.com/releases/2012/12/121217190527.htm 

Ants Aquaplaning On a Pitcher Plant: Venezuelan Pitcher Plant Uses Wettable Hairs to Make Insects Slip Into Its Deadly Traps

Dec. 18, 2012 — An insect-trapping pitcher plant in Venezuela uses its downward pointing hairs to create a 'water slide' on which insects slip to their death, new research reveals. The research was published December 19, in the journal Proceedings of the Royal Society B.

Hairs on plants, called trichomes, are typically used to repel water. However, the Cambridge researchers observed that the hairs on the inside of Heliamphora nutans pitcher plants were highly wettable, prompting them to test whether this phenomenon is related to the trapping of insects.

They found that wetting strongly enhanced the slipperiness of the trap and increased the capture rate for ants almost three-fold -- from 29 per cent when dry to 88 per cent when wet. Upon further examination, they found that the wetting affected the insects' adhesive pads while the directional arrangement of the hairs was effective against the claws.

Dr Ulrike Bauer, lead author of the paper from the University of Cambridge, said: "When the hairs of the plant are wet, the ants' adhesive pads essentially aquaplane on the surface, making the insects lose grip and slip into the bowl of the pitcher. This is the first time that we have observed hairs being used by plants in this way, as they are typically used to make leaves water repellent."

They also found that the plant used a wicking method during dryer times to pull moisture from the bowl of the pitcher up to the hairy trapping surface, enabling them to capitalise on this aquaplaning effect even when there is no rain.

Dr Bauer added: "This very neat adaptation might help the plants to maximise their nutrient acquisition."

The Heliamphora nutans pitcher plant lives on the spectacular table mountains of the Guyana Highlands in Southern Venezuela, between altitudes of 2000-2700m. The pitchers can grow up to 18 cm tall and 7 cm wide and trap mainly ants.
An insect-trapping pitcher plant in Venezuela uses its downward pointing hairs to create a 'water slide' on which insects slip to their death, new research reveals. (Credit: Image courtesy of University of Cambridge)

Journal Reference:
U. Bauer, M. Scharmann, J. Skepper, W. Federle. 'Insect aquaplaning' on a superhydrophilic hairy surface: how Heliamphora nutans Benth. pitcher plants capture prey. Proceedings of the Royal Society B: Biological Sciences, 2012; 280 (1753): 20122569 DOI: 10.1098/rspb.2012.2569

Link:
http://www.sciencedaily.com/releases/2012/12/121218203513.htm