Navigation Links
Surprising discovery: X-rays drive formation of new crystals
Date:1/25/2010

opaque.

"There was a dramatic change in the way filaments scattered the radiation," said first author Honggang Cui, a postdoctoral fellow in Stupp's lab. "The X-rays turned a disordered structure into something ordered -- a crystal."

The X-rays increase the charge of the filaments, and thus a repulsive electrostatic force drives the crystallization -- a hexagonal stacking of filaments. Trapped in a three-dimensional network, the charged bundled filaments are unable to escape from each other. The crystals disappear when the X-rays are turned off, and the material is not significantly damaged by the radiation.

As a result of repulsive forces, the filaments are positioned far apart from each other, with as much as 320 angstroms separating the filaments. This striking feature is not found in ordinary crystals where molecules are less than five angstroms apart.

"There are oceans of water inside the crystal," Stupp said. "More than 99 percent of the structure is water." The researchers also observed that when the concentration of the charged filaments in solution was higher, the same crystals formed spontaneously without the need to expose them to X-rays.


'/>"/>

Contact: Megan Fellman
fellman@northwestern.edu
847-491-3115
Northwestern University
Source:Eurekalert

Page: 1 2

Related biology technology :

1. The MedZilla Report for September 2009 - Care Grows Again in September and - Surprisingly - Pharma Sales Jobs Up Too
2. Proteomics Study Reveals That Genes Involved in Invertebrate Longevity Have Surprising Parallels in Humans.
3. Jatropha World 2009 Advance Access: Surprisingly Candid Interview Series Examines Biofuel Predictions Compared to Fossil Fuels
4. Jatropha World 2009 Advance Access: Surprisingly Candid Interview Series Examines Biofuel Predictions Compared to Fossil Fuels
5. QImaging Introduces 64-Bit QCam Driver
6. Novus Biologicals Awards Contract to Biovista Inc. to Drive its Web-Based Novus Explorer Service
7. PacsDrive Announces Low Cost Medical Imaging Storage Service, Seeks to Alter Status Quo in Health Care IT
8. Broad-Spectrum Antibacterial Activity is the Most Important Driver of Antibiotic Selection for Nosocomial Pneumonia In Europe
9. Continued Uptake of TNF-Alpha Inhibitors and Interleukin Inhibitors Will Drive $2.2 Billion Growth in the Psoriasis Drug Market
10. Environmental & Economic Factors Drives Global Demand for Pharmaceutical leak Testing and Deblistering
11. TOPAZ Technologies Protocols for Animal Studies Software Drives Customer Conversions
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:8/21/2014)... , Aug. 21, 2014 ... Immune Pharmaceuticals Inc., a biotechnology company, on its ... Immune previously traded on OTCQX®, the best marketplace ... OTC Markets Group. Logo - http://photos.prnewswire.com/prnh/20110118/MM31963LOGO ... on the successful execution of its growth strategy ...
(Date:8/21/2014)... 2014 Gallus BioPharmaceuticals , ... and manufacturing organization (CMO) announced today that it ... oncology company focused on the development of innovative ... the anti-prostate specific membrane antigen (PSMA) monoclonal antibody ... Under the agreement the antibody will be produced ...
(Date:8/20/2014)... it that American Indians largely were wiped out by ... tuberculosis brought to the New World by European explorers., ... people lived in the Americas shortly before Europeans arrived, ... European diseases., But new research led by anthropological geneticists ... of the University of Tubingen in Germany indicates the ...
(Date:8/20/2014)... BOSTON , Aug. 20, 2014  PAREXEL International ... it will be presenting at the Baird Healthcare Conference ... President and Chief Financial Officer, will be making a ... p.m. EDT on Wednesday, Sept. 3, 2014. ... through the "Investors" section of PAREXEL,s website at ...
Breaking Biology Technology:OTC Markets Group Congratulates Immune Pharmaceuticals on NASDAQ Listing 2Gallus Enters Agreement with Progenics Pharmaceuticals, Inc. for Manufacture of Anti-PSMA Monoclonal Antibody 2Gallus Enters Agreement with Progenics Pharmaceuticals, Inc. for Manufacture of Anti-PSMA Monoclonal Antibody 3Unusual discovery leads to fascinating tuberculosis theory 2Unusual discovery leads to fascinating tuberculosis theory 3PAREXEL International To Present At Baird Healthcare Conference 2
... mutational spectrum , , , ... , , , ... , , ... GeneMorph PCR , mutagenesis kit , ...
... , Faster, easier screening for difficult transfections ... Vaillancourt Katherine A. Felts ,Stratagene , We ... for delivery of the ecdysone receptor proteins RXR ... estimated single copy of the receptor,cassette, induction ratios ...
... nonradioactive cyclic-AMP detection kit and adenylate cyclase,(AC) toxin ... Systems, Inc. , Xinping Yang and Timothy G. ... cAMP Kit is a highly sensitive and specific,antibody-based ... of cAMP. The assay is based on the ...
Cached Biology Technology:Randomize Gene Sequences with New PCR Mutagenesis Kit 2Randomize Gene Sequences with New PCR Mutagenesis Kit 3Randomize Gene Sequences with New PCR Mutagenesis Kit 4Randomize Gene Sequences with New PCR Mutagenesis Kit 5Randomize Gene Sequences with New PCR Mutagenesis Kit 6Randomize Gene Sequences with New PCR Mutagenesis Kit 7Randomize Gene Sequences with New PCR Mutagenesis Kit 8Randomize Gene Sequences with New PCR Mutagenesis Kit 9Randomize Gene Sequences with New PCR Mutagenesis Kit 10Randomize Gene Sequences with New PCR Mutagenesis Kit 11pFB-ERV: Retroviral Delivery of the Ecdysone Receptor Proteins 2pFB-ERV: Retroviral Delivery of the Ecdysone Receptor Proteins 3pFB-ERV: Retroviral Delivery of the Ecdysone Receptor Proteins 4pFB-ERV: Retroviral Delivery of the Ecdysone Receptor Proteins 5pFB-ERV: Retroviral Delivery of the Ecdysone Receptor Proteins 6Enzyme Immunoassay for Studying Intracellular Levels of cAMP 2Enzyme Immunoassay for Studying Intracellular Levels of cAMP 3Enzyme Immunoassay for Studying Intracellular Levels of cAMP 4Enzyme Immunoassay for Studying Intracellular Levels of cAMP 5Enzyme Immunoassay for Studying Intracellular Levels of cAMP 6
(Date:8/22/2014)... important discoveries in basic and clinical research and ... into a complex offensive spanning multiple fronts. , ... lab could help find new and more selective ... that targets a specific enzyme overexpressed in certain ... from brain tumours. , Chemistry professor Christopher Cairo ...
(Date:8/22/2014)... Green tea polyphenols are strong antioxidants and ... protect spinal cord neurons against oxidative stress? ... Affiliated Hospital of Liaoning Medical University, China ... oxidative stress and inhibit neuronal apoptosis, indicating ... in spinal cord neurons under oxidative stress. ...
(Date:8/22/2014)... CAEveryone,s heard of the birds and the bees. ... that are being fertilized. The fertilization process for ... communication between the male and female reproductive cells. ... Regensburg, Heidelberg, and Munich, and including Carnegie,s Wolf ... in the chemical signaling process that guides flowering ...
Breaking Biology News(10 mins):New enzyme targets for selective cancer therapies 2New enzyme targets for selective cancer therapies 3Calcium and reproduction go together 2
... spending the holidays with big Uncle Frank or bossy Aunt ... another family, spare a thought for the humble cichlid fish. ... University of New South Wales has found that among cichlids, ... about their living situation. The results appear in ...
... DURHAM, N.C. As good as laparoscopy is in preventing ... it does have drawbacks, including reduced blood flow and organ ... done through small incisions. By ... the surgical area during laparoscopy, researchers at Duke University Medical ...
... CADecember 10, 2009Researchers at The Scripps Research Institute have ... from an ancient family of enzymes can have two ... providing guidance for understanding other molecules in the family, ... possible use for combating diseases including cancer and macular ...
Cached Biology News:Gas improves blood flow and organ status during minimally invasive surgery 2Scripps Research scientists crack mystery of protein's dual function 2Scripps Research scientists crack mystery of protein's dual function 3
... cells form from a hematopoietic stem cells ... to the bone surface and lowering the ... around 4.5. The bone mineral is then ... and function is controlled primarily by Macrophage ...
... Proliferator-Activated Receptor-gamma (PPAR) is a member ... ligand-activated transcription factors that heterodimerize with ... involved in the regulation of glucose ... (TZD) class of anti-diabetic agents called ...
... acid hybridization Preparation Reconstitution: one ... 50 mg ficoll and 50 ... ml of water yields a ... biology Density: 1.00 g/mL (20 ...
... The ProteinChip Antibody ... assay development and optimization ... evaluate antibody-antigen interactions. This ... and differentiation of multiple ...
Biology Products: