Navigation Links
Mainz scientists confirm original tetrahedral model of the molecular structure of water
Date:2/12/2013

Researchers at Johannes Gutenberg University Mainz (JGU) have confirmed the original model of the molecular structure of water and have thus made it possible to resolve a long-standing scientific controversy about the structure of liquid water. The tetrahedral model was first postulated nearly 100 years ago and it assumes that every water molecule forms a so-called hydrogen bond with four adjacent molecules. This concept was almost toppled in 2004 when an international research group announced that it had experimentally established that water molecules form bonds only with two other molecules. "The quality of the results was excellent but they merely represent a snapshot of the situation," explained Professor Dr. Thomas Khne. He has demonstrated the fallacy of the 'double bonding' theory using computer simulations based on new types of combinations of two computational methods recently developed by his group.

Some very special and unique features of water, such as its liquid aggregate state and high boiling point, are attributable to the effect of the hydrogen bonds between the water molecules. The H bonds are formed due to the different charges carried by the oxygen and hydrogen atoms that make up water molecules and the resultant dipolar structure. The traditional, generally accepted view was that water had a tetrahedral structure at room temperature, so that on average each water molecule would be linked with four adjacent molecules via two donor and two acceptor bonds. "In our theoretical approach, the median result we observed over time was always for quadruple bonding," said Khne. Thanks to the new simulations, he and his colleague Dr. Rhustam Khaliullin have now been able to confirm the old model and also supply an explanation for why double bonding was observed in 2004. According to Khne, the result was not indicative of double bonding "but of instantaneous asymmetrical fluctuation" only.

There is thus significant asymmetry in the fou
'/>"/>

Contact: Junior Professor Dr. Thomas D. Khne
kuehne@uni-mainz.de
49-613-139-23699
Johannes Gutenberg Universitaet Mainz
Source:Eurekalert

Page: 1 2

Related biology news :

1. Mainz University Medical Center attracts funding of Alexander von Humboldt Professorship
2. Mainz University coordinates new EU project on the origins of human settlement
3. Scientists from Bangalore and Mainz develop new methods for cooling of ions
4. Mainz University Medical Center agrees partnership with Yale University
5. Stanford scientists develop gene therapy approach to grow blood vessels in ischemic limbs
6. Queens scientists seek vaccine for Pseudomonas infection
7. Scientists produce eye structures from human blood-derived stem cells
8. American Society of Plant Biologists honors early career women scientists
9. Brandeis scientists win prestigious prize for circadian rhythms research
10. Scientists discover new method of proton transfer
11. Salk scientists open new window into how cancers override cellular growth controls
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:9/2/2014)... and their propensity for eating anything, including each other, ... research from North Carolina State University finds that non-native ... eastern United States. , "The good news is that ... threat to humans," says Dr. Mary Jane Epps, a ... a paper about the research. , The research stems ...
(Date:9/1/2014)... us fat? An increasing amount of research shows an ... a more sedentary lifestyle. Now, a new Cornell University ... Some TV programs might lead people to eat twice ... you,re watching an action movie while snacking your mouth ... lead author on the new article just published in ...
(Date:9/1/2014)... after birth, every child in the U.S. undergoes a ... conditions, including sickle cell disease. Thousands of children born ... many suffer and die from the disease each year. ... to at least some of those deaths. , ... in the lab of George Whitesides, the Woodford L. ...
Breaking Biology News(10 mins):Researchers find Asian camel crickets now common in US homes 2Can action movies make you fat? 2Faster, cheaper tests for sickle cell 2Faster, cheaper tests for sickle cell 3
... are usually the largest players and have the endurance required ... comes to fish, larger doesn,t always mean stronger. A University ... than larger fish. "The point of the study was ... fish," said researcher Cory Suski. "We wanted to know if ...
... study to systematically investigate genome-wide epigenetic differences in ... at the Institute of Psychiatry (IoP) at King,s ... play an important role in neuropsychiatric disease. Published ... may offer potential new avenues for treatment. ...
... the classroom, and many of them speak a different language ... University of Gerona has assessed the knowledge of Catalan and ... least six years to acquire the same language levels as ... successful in other countries as a way of stopping language ...
Cached Biology News:Small fish recover faster than large fish 2Twin study reveals epigenetic alterations of psychiatric disorders 2Foreign children take at least 6 years to learn the language used in school 2Foreign children take at least 6 years to learn the language used in school 3
(Date:9/2/2014)... Winston-Salem, NC and Rocky Mount, NC (PRWEB) September 02, ... (PMG) announced today the establishment of its 11th clinical ... 1, PMG Research has assumed ownership and operation of ... in Rocky Mount, NC, further expanding PMG’s presence in ... to an additional 130,000 patients. For the patients in ...
(Date:9/1/2014)... The global oligonucleotide synthesis market is expected to ... in 2014, growing at a CAGR of 9.8% ... market is categorized on the basis of products ... synthesized oligonucleotides segment is expected to register the ... during the forecast period, owing to an increasing ...
(Date:8/31/2014)... Texas (PRWEB) August 31, 2014 ... the current state of the Epoxy Hardener ... a basic overview of the industry, including definitions, ... and Chinese domestic market analysis are provided with ... landscape of the market. A comparison between the ...
(Date:8/29/2014)... August 29, 2014 According to a new ... the global orthobiologics market was valued at USD 3,754.6 million ... USD 5,519.9million in 2019at a CAGR of 5.9% from 2013 ... years and above is afflicted by bone and joint disorders, ... year 2020. This has and will continue to increase the ...
Breaking Biology Technology:PMG Research Announces the Formation of its Eleventh Site 2PMG Research Announces the Formation of its Eleventh Site 39.8% CAGR for Oligonucleotide Synthesis Market Globally to 2019 Says a New Research Report Available at RnRMarketResearch.com 29.8% CAGR for Oligonucleotide Synthesis Market Globally to 2019 Says a New Research Report Available at RnRMarketResearch.com 39.8% CAGR for Oligonucleotide Synthesis Market Globally to 2019 Says a New Research Report Available at RnRMarketResearch.com 49.8% CAGR for Oligonucleotide Synthesis Market Globally to 2019 Says a New Research Report Available at RnRMarketResearch.com 5Epoxy Hardener Industry Development Trends in Global & China Regions Now Available at ReportsnReports.com 2Epoxy Hardener Industry Development Trends in Global & China Regions Now Available at ReportsnReports.com 3Global Orthobiologics Market to Reach $5,519.9 Million by 2019: Transparency Market Research 2Global Orthobiologics Market to Reach $5,519.9 Million by 2019: Transparency Market Research 3
... ... if (typeof(lpUnit)==,undefined,) var lpUnit=,PRN,; --> ... var shortURL = ""; BitlyCB.alertResponse = function(data) { var s = ,; var first_result; // ... data.results) { first_result = data.results[r]; break; } for (var key in first_result) { //s += key + ...
... Ohio -- In a development that holds potential for both ... used a new technique to obtain the highest-ever resolution MRI ... Ohio Eminent Scholar in Experimental Physics, and his colleagues took ... of a meter) across and 40 nanometers (billionths of a ...
... scientists who proved it is possible to cultivate a network ... or the brain on a microchip have been involved ... activity at a resolution never achieved before. Developed ... chips are also simpler to use, which will help future ...
Cached Biology Technology:FDA Grants Approval of ella(R) for Emergency Contraception 2FDA Grants Approval of ella(R) for Emergency Contraception 3FDA Grants Approval of ella(R) for Emergency Contraception 4FDA Grants Approval of ella(R) for Emergency Contraception 5FDA Grants Approval of ella(R) for Emergency Contraception 6FDA Grants Approval of ella(R) for Emergency Contraception 7Scientists achieve highest-resolution MRI of a magnet 2Neurochip technology developed by Canadian team 2
TRIS-EDTA based buffer prepared from RNase-free water suitable for storage and dilution of siRNA, pH 8, store at 4 C ...
Request Info...
...
Request Info...
Biology Products: