Sunday, 25 June 2017
News with tag Chemicals  RSS
Self-folding origami: Chemical programming allows Nafion sheets to fold and refold

Added: 24.06.2017 17:52 | 1 views | 0 comments

Plastic with a thousand faces: A single piece of Nafion foil makes it possible to produce a broad palette of complex 3-D structures. Researchers now describe how they use simple chemical 'programming' to induce the foil to fold itself using origami and kirigami principles. These folds can be repeatedly 'erased' and the foil can be 'reprogrammed'.

From: https:

Can Hair Dye and Chemical Relaxers Cause Breast Cancer?

Added: 24.06.2017 8:56 | 0 views | 0 comments


A new study conducted by Rutgers School of Public Health found a connection between hair dye and relaxer usage and an increased chance of developing breast cancer. The results show that way these products affect you has a lot to do with your race. The study found that African-American women who used dark brown or black hair dyes saw a 51 percent increased risk of developing breast cancer. These products also led to a 72 percent increase specifically in estrogen-positive ...

State-of-the-art text mining technologies for chemistry

Added: 23.06.2017 20:06 | 1 views | 0 comments

The first exhaustive revision of the state-of-the-art methodologies underlying chemical search engines, named entity recognition and text mining systems, has now been published by researchers.

From: feeds.sciencedaily.com

How a single chemical bond balances cells between life and death

Added: 23.06.2017 18:51 | 0 views | 0 comments

With SLAC's X-ray laser and synchrotron, scientists measured exactly how much energy goes into keeping a crucial chemical bond from triggering a cell's death spiral.

From: https:

Scientists recreate Californian Indian water bottles to study ancient exposure to chemicals

Added: 23.06.2017 16:05 | 1 views | 0 comments

Water bottles replicated in the traditional method used by Native Californian Indians reveal that the manufacturing process may have been detrimental to the health of these people.

From: https:

How a single chemical bond balances cells between life and death

Added: 23.06.2017 16:03 | 1 views | 0 comments

With SLAC's X-ray laser and synchrotron, scientists measured exactly how much energy goes into keeping a crucial chemical bond from triggering a cell's death spiral.

From: feeds.sciencedaily.com

EPA staffers, Trump official clashed over new chemical rules

Added: 23.06.2017 0:53 | 0 views | 0 comments

The Trump administration appears poised to cement key rules that were heavily shaped by an expert who was a top official for the chemical industry's lobbying group.

Tags: Chemicals
From: www.politico.com

EPA sets rules to regulate toxic chemicals under 2016 law

Added: 22.06.2017 23:39 | 1 views | 0 comments

The Environmental Protection Agency issued new rules and other documents Thursday outlining how it will regulate toxic chemicals under a landmark law passed by Congress last year.

From: feeds.foxbusiness.com

Metalloprotein entatic control of ligand-metal bonds quantified by ultrafast x-ray spectroscopy

Added: 22.06.2017 20:55 | 1 views | 0 comments


The multifunctional protein cytochrome c (cyt c) plays key roles in electron transport and apoptosis, switching function by modulating bonding between a heme iron and the sulfur in a methionine residue. This Fe-S(Met) bond is too weak to persist in the absence of protein constraints. We ruptured the bond in ferrous cyt c using an optical laser pulse and monitored the bond reformation within the protein active site using ultrafast x-ray pulses from an x-ray free-electron laser, determining that the Fe-S(Met) bond enthalpy is ~4 kcal/mol stronger than in the absence of protein constraints. The 4 kcal/mol is comparable with calculations of stabilization effects in other systems, demonstrating how biological systems use an entatic state for modest yet accessible energetics to modulate chemical function.

Tags: Chemicals
From: science.sciencemag.org

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