Navigation Links
Using pressure to swell pores, not crush them
Date:7/16/2013

More than a decade ago, Thomas Vogt and Yongjae Lee, then colleagues at Brookhaven National Laboratory, uncovered a counter-intuitive property of zeolites. When they put these porous minerals in water, and then put the water under high pressure, the tiny cavities within the zeolites actually grew in size.

Pressure failed to crush, and even caused expansion. In the years since, Vogt and Lee, now at the University of South Carolina and Yonsei University (Seoul), respectively, have followed up with cation exchange experiments, placing a series of alkali metal ions into the pores of the aluminosilicate zeolites, particularly focusing on natrolite. X-ray diffraction studies, in collaboration with Chi-Chang Kao at Stanford University, have revealed the interior geometry of the cavities and the arrangement of the cations and water molecules held within, before and after pressurization.

The team has just published a detailed characterization of Li+, Na+, K+, Rb+ and Cs+ natrolites, the first four of which, when treated under pressure in water, become "super-hydrated" with water molecules that is, the process inserts more water molecules into the zeolites than are present under ambient conditions.

The water molecules and ions together adjust the surrounding aluminosilicate framework. The team likens the shift in structure under pressure to what you see when you shift a "chatterbox," the children's fortune teller constructed from paper. The pressure-induced hydration can cause dramatic unit cell volume increases: more than a 20 percent expansion in Li-natrolite, for example.

The phenomenon is more than just an academic curiosity. The team is pursuing a number of applications in which a "tuned" cavity size that is triggered by pressure could be useful. Selectively and irreversibly trapping radioactive cations in a nuclear waste stream, for example, is just one area in which they've already demonstrated progress.


'/>"/>

Contact: Steven Powell
spowell2@mailbox.sc.edu
803-777-1923
University of South Carolina
Source:Eurekalert

Page: 1

Related biology technology :

1. Official Opening of UKs Biggest Bioethanol Plant Using Praj Technology
2. New Approaches in Immunogenicity Assessment Using the New SQiDlite™ System: Case Study Analysis, New Life Science Webinar Hosted by Xtalks
3. Live Xtalks Webinar Highlights Vaccine and Biotherapeutic Formulation Development and Manufacture Using Spray-Drying
4. Natural Acne Remedy, Probiotic Action Explains the Science behind Using Probiotics for Better Health
5. RegeneCure Starts Clinical Study Using Polymeric Bone Stimulating Membrane for Dental Implants
6. What Causes Acne? Adult Acne Treatment, Probiotic Action, Shares Insight on New Culprits Causing Breakouts
7. Rapid Identification and Strain Typing of Salmonella in Food Using Genome Sequence Scanning Technology
8. Steps for Getting Rid of Bed Bugs without Using Chemicals and Avoiding Them While Traveling Enumerated by My Cleaning Products in Its Latest Post
9. The Majority of Physicians that Treat Hepatitis C Virus (HCV) Have Begun "Warehousing" and Preparing Their HCV Patients for the Next Generation of HCV Treatments
10. Acne Cream, Probiotic Action Shares News on How Some Food may Breed Acne Causing Bacteria
11. Bed Bugs Cost Alton Housing Authority $35,000; New Help, How to Kill Bed Bugs With Less Expense, Introduced by My Cleaning Products
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:7/10/2014)... Ouagadougou, Burkina Faso (PRWEB) July 10, 2014 ... Burkina Faso, today have access to an additional ... to increase access to contraception at all levels ... combining a lower-dose formulation of a widely used ... injection system. , Burkina Faso is the first ...
(Date:7/10/2014)... UK (PRWEB) July 10, 2014 ... 21st Century Medicine Forum on ‘Commercialising Longevity Research’ ... and entrepreneurs to the London Bioscience Innovation Center ... Research Foundation and Aging Analytics Ltd. The meeting ... investment in translational research for age-related disease, as ...
(Date:7/10/2014)... Terascala, the industry leader in ... a former vice president of product management for Flexera ... of marketing. Terascala’s software when combined with leading compute ... highest performance and most reliable solutions for processing big ... channel expansion and broaden its product portfolio. His leadership ...
(Date:7/10/2014)... Robert Harman, DVM, Founder and CEO of Vet-Stem, Inc., ... the relaunch of his highly informative blog, now named Stem ... What are Stem Cells ?” Dr. Harman’s purpose for ... the basics of stem cell therapy so that pet owners ... treatment when considering regenerative medicine. , A veterinarian by trade, ...
Breaking Biology Technology:Injectable Contraceptive Launched in Burkina Faso to Expand Choice and Address Unmet Need 2Injectable Contraceptive Launched in Burkina Faso to Expand Choice and Address Unmet Need 3Injectable Contraceptive Launched in Burkina Faso to Expand Choice and Address Unmet Need 4Injectable Contraceptive Launched in Burkina Faso to Expand Choice and Address Unmet Need 5Injectable Contraceptive Launched in Burkina Faso to Expand Choice and Address Unmet Need 6DKV Sponsors Forum on Commercialising Longevity Research; Brings Together Scientists, Investors, Entrepreneurs and Celebrities 2DKV Sponsors Forum on Commercialising Longevity Research; Brings Together Scientists, Investors, Entrepreneurs and Celebrities 3DKV Sponsors Forum on Commercialising Longevity Research; Brings Together Scientists, Investors, Entrepreneurs and Celebrities 4DKV Sponsors Forum on Commercialising Longevity Research; Brings Together Scientists, Investors, Entrepreneurs and Celebrities 5DKV Sponsors Forum on Commercialising Longevity Research; Brings Together Scientists, Investors, Entrepreneurs and Celebrities 6Terascala Expands Executive Team 2Terascala Expands Executive Team 3Robert Harman, DVM Talks About What Stem Cells are in His Latest Blog Series for Vet-Stem, Inc. 2Robert Harman, DVM Talks About What Stem Cells are in His Latest Blog Series for Vet-Stem, Inc. 3
... - AEterna Zentaris Inc. (NASDAQ: AEZS ... on endocrine therapy and oncology, announced today that ... offering of US$10 million of units comprised of ... certain institutional investors. AEterna Zentaris received net proceeds ...
... 24 Cancer therapies and diagnostics, including new technologies, enhanced ... testing, will be at the center of Cleveland Clinic,s 7th ... Summit will bring together more than 900 leaders from throughout ... cancer care, exchange perspectives and gain actionable insights. , ...
... & Industry Milestone of 1000 + Egg Donors , ... collaboration of egg donor agencies through out the United States, ... web-based collective of egg donors - has quickly become one ... more than one thousand diverse and multi-cultural egg donor candidates. ...
Cached Biology Technology:AEterna Zentaris Receives US$10 Million from Institutional Investors 2AEterna Zentaris Receives US$10 Million from Institutional Investors 32009 Medical Innovation Summit at Cleveland Clinic to Highlight the Latest Developments in Cancer Care 22009 Medical Innovation Summit at Cleveland Clinic to Highlight the Latest Developments in Cancer Care 3First-Ever Egg Donor Web Portal Becomes One of The Largest Resources for Aspiring Parents in the U.S. 2
(Date:7/11/2014)... China Researchers from Salk Institute for Biological Studies, ... evaluated the safety and reliability of the existing ... new method, TALEN-HDAdV, which could significantly increased gene-correction ... This study published online in Cell Stell ... stem cell-based gene therapy. , The combination of ...
(Date:7/11/2014)... Researchers from Ume University, Sweden, have explored two ... the reaction sequence leading to the formation of ... been published in the scientific journal Nature ... improving present day synthetic catalysts for water oxidation, ... devices for the direct storage of solar energy ...
(Date:7/11/2014)... has demonstrated that transplantation of mesenchymal stem cells can ... mouse models of Alzheimer,s disease (AD) and improve tissue ... Few studies are reported on the therapeutic effect of ... and on the effect on oxidative injury and neurogenesis ... and her team, School of Life Sciences, Tsinghua University, ...
Breaking Biology News(10 mins):A new genome editing method brings the possibility of gene therapies closer to reality 2Molecular snapshots of oxygen formation in photosynthesis 2
... Botanists at Oregon State University have discovered that a ... at the same time it produces susceptibility to a ... has ever been observed in plants. The finding, ... of Sciences, may help scientists better understand the pathways ...
... coastal waters interfere with fish reproduction by disrupting the ... Texas at Austin Marine Science Institute has found. ... hypoxia, have increased dramatically in coastal waters throughout the ... result of increased run-off from human agricultural and industrial ...
... Saudi Arabia (August 30, 2007) Saudi Arabias King ... the Indian Institute of Technology, Bombay (IIT Bombay) ... 2, 2007, to work together to foster world-class programs that ... development in fundamental and applied chemical sciences for the benefit ...
Cached Biology News:Same gene protects from 1 disease, opens door to another 2Low oxygen in coastal waters impairs fish reproduction 2Saudi Arabia's KAUST and IIT, Bombay to Collaborate on Scientific Research 2