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General Science / Chemistry news 1234

New reasons to avoid grapefruit and other juices when taking certain drugs

August 19, 2008 | User rating: 4.5 / 5 after 24 vote(s) | No comments yet

Scientists and consumers have known for years that grapefruit juice can increase the absorption of certain drugs — with the potential for turning normal doses into toxic overdoses. Now, the researcher who ...


Food, health get top billing at national chemistry meeting

August 19, 2008 | User rating: not rated yet | No comments yet

Well beyond the advice to drink enough water and not eat too much NaCl, the nation's chemists will get elemental with grapefruit, onions, peppers, tomatoes, carrots and watermelons this week at the American Chemical Society ...


'Cutting by color': New imaging technique for more precise cancer surgery

August 19, 2008 | User rating: 4.7 / 5 after 32 vote(s) | No comments yet

Instead of "paint by number," you might call it "cutting by color": Researchers in Massachusetts now report development and early clinical trials of a new imaging system that highlights cancerous tissue in ...


Catalyst mystery unlocked

August 18, 2008 | User rating: 4.7 / 5 after 12 vote(s) | User comments: 3

Different keys are not supposed to fit the same lock, but in biological systems multiple versions of a catalyst all make a reaction go, according to a new study that explains the phenomenon. Scheduled for online publication ...


Green catalysts provide promise for cleaning toxins and pollutants

August 18, 2008 | User rating: not shown ( 3 vote(s) ) | No comments yet

Tetra-Amido Macrocyclic Ligands (TAMLs) are environmentally friendly catalysts with a host of applications for reducing and cleaning up pollutants, and a prime example of "green chemistry." Carnegie Mellon University's Terry ...


Pesticide build-up could lead to poor honey bee health

August 18, 2008 | User rating: not shown ( 4 vote(s) ) | User comments: 1

Honey bees industriously bring pollen and nectar to the hive, but along with the bounty comes a wide variety of pesticides, according to Penn State researchers. Add the outside assault to the pesticides already ...


Synthetic Molecules Could Add Spice To Fight Against Cancer

August 18, 2008 | User rating: 4.5 / 5 after 6 vote(s) | No comments yet

Seeking to improve on nature, scientists used a spice-based compound as a starting point and developed synthetic molecules that, in lab settings, are able to kill cancer cells and stop the cells from spreading. The researchers ...


Gel undergoes Peristalsis

August 18, 2008 | User rating: 4.5 / 5 after 15 vote(s) | User comments: 4

(PhysOrg.com) -- Large or small, machine parts only move when controlled by an external impulse. Biological systems, on the other hand, are capable of autonomous movements that continuously follow their own rhythms and spatial ...


Chemists make beds with soft landings

August 18, 2008 | User rating: not rated yet | No comments yet

Bedsprings aren't often found in biology. Now, chemists have succeeded in making a layer of tiny protein coils attached to a surface, much like miniature bedsprings in a frame. This thin film made of stable ...


Newly detected air pollutant mimics damaging effects of cigarette smoke

August 17, 2008 | User rating: 4.4 / 5 after 28 vote(s) | User comments: 3

A previously unrecognized group of air pollutants could have effects remarkably similar to harmful substances found in tobacco smoke, Louisiana scientists are reporting in a study scheduled for presentation ...


Chemists move closer toward developing safer, fully-synthetic form of heparin

August 17, 2008 | User rating: not shown ( 3 vote(s) ) | No comments yet

Chemists are reporting a major advance toward developing a safer, fully-synthetic version of heparin, the widely used blood thinner now produced from pig intestines. The U. S. Food and Drug Administration last spring linked ...


Heads-up study of hair dynamics may lead to better hair-care products

August 17, 2008 | User rating: not shown ( 3 vote(s) ) | No comments yet

From frizzy perms to over-bleached waves, "bad hair days" could soon become a less frequent occurrence. Chemists report the first detailed microscopic analysis of what happens to individual hair fibers when ...


Improved technique determines structure in membrane proteins

August 17, 2008 | User rating: not shown ( 3 vote(s) ) | No comments yet

Understanding the form and function of certain proteins in the human body is becoming faster and easier, thanks to the work of researchers at the University of Illinois.


Scientists learn from nature to split water

August 17, 2008 | User rating: 4.8 / 5 after 77 vote(s) | No comments yet

An international team of researchers led by Monash University has used chemicals found in plants to replicate a key process in photosynthesis paving the way to a new approach that uses sunlight to split water into hydrogen ...


Hydrogels provide scaffolding for growth of bone cells

August 17, 2008 | User rating: not shown ( 3 vote(s) ) | No comments yet

Hyaluronic hydrogels developed by Carnegie Mellon University researchers may provide a suitable scaffolding to enable bone regeneration. The hydrogels, created by Newell Washburn, Krzysztof Matyjaszewski and Jeffrey Hollinger, ...


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