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Top News In தொழில்நுட்ப பல்கலைக்கழகம் ஆஃப் டார்ட்மண்ட் Today - Breaking & Trending Today

The making of a megacity: how Dhaka transformed in 50 years of Bangladesh

The making of a megacity: how Dhaka transformed in 50 years of Bangladesh
theguardian.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from theguardian.com Daily Mail and Mail on Sunday newspapers.

East Pakistan , Shahadat Hossain , Henry Kissinger , Asaduzzaman Asad , Parveen Begum , International Monetary Fund , Technical University Of Dortmund , Old Dhaka , Technical University , கிழக்கு பாக்கிஸ்தான் , ஷாஹாதத் ஹொசைன் , ஹென்றி கிஸ்ஸிங்கர் , பாருவீன் பிச்சம் , சர்வதேச பண நிதி , தொழில்நுட்ப பல்கலைக்கழகம் ஆஃப் டார்ட்மண்ட் , பழையது டாக்கா , தொழில்நுட்ப பல்கலைக்கழகம் ,

The hole story of how cage molecules could transform synthesis and separation

It is these extreme confinement effects that ‘enables us to do chemistry that we can’t do in traditional ways’, says Angela Grommet from the Weizmann Institute of Science in Israel who recently wrote a review
2 on the topic. After 35 years of research, chemists are now starting to unlock the potential of confinement by designing molecular cages that fold up long molecules into huge macrocycles, or creating cavities that can separate deuterium from hydrogen. In the future, confined spaces could rival enzymes in their ability to catalyse reactions or protect unstable species, turning them into useful reagents.
It all started with the discovery of carcerands more than three decades ago. Donald Cram wanted to take the chemistry of crown ethers – flat, circular molecules that can capture individual metal atoms on their inside – into the third dimension. In 1985, he functionalised big cyclic molecules so pairs of them could be brought together to form a capsule. Cram c ....

United States , City Of , United Kingdom , Makoto Fujita , Pablo Ballester , Michaele Hardie , Ken Raymond , Harry Destecroix , Hiroki Takezawa , Ramamoorthy Boomishankar , Hanna Slater , Anthony Davis , Bruce Gibb , Jean Marie Lehn , Charles Pedersen , Julius Rebek , Robert Bergman , Shaodong Zhang , Scripps Research Institute , University Of California , Weizmann Institute Of Science , Technical University Of Dortmund , Indian Institute Of Science Education , Tulane University , University Of Liverpool , Institute Of Chemical Research Catalonia ,

Temporal control of light echoes

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Wie man in den Wald hineinruft, so schallt es heraus ( shout into the forest and a similar echo will return , or What goes around, comes around ), is not only a well-known German proverb, but is also literally true. When a sound wave is reflected, the echo is heard. When exactly it comes back, however, depends on the forest - but first and foremost on the distance between the caller and the place of reflection, explains Professor Torsten Meier from Paderborn University. Just imagine that you could tailor when you wanted the echo to come back to you, continues the physicist. A team of scientists has now achieved just this. Not for acoustic signals, however, but for optical signals: The scientists succeeded in controlling photon echoes emitted by semiconductor quantum dots with sub-second precision. ....

Nordrhein Westfalen , Hendrik Rose , Torsten Meier , Alexander Kosarev , Professor Ilya Akimov Technical University Of Dortmund , German Research Foundation , Technical University Of Dortmund , Institute For Photonic Quantum Systems Pho , Paderborn University , Professor Torsten Meier , Professor Ilya Akimov , Technical University , Photonic Quantum Systems , னோற்ர்ேன் வெஸ்ட்ஃபாலன் , ஹென்ட்ரிக் உயர்ந்தது , ஜெர்மன் ஆராய்ச்சி அடித்தளம் , தொழில்நுட்ப பல்கலைக்கழகம் ஆஃப் டார்ட்மண்ட் , நிறுவனம் க்கு ஃபோட்டானிக் குவாண்டம் அமைப்புகள் ஃபோ , தொழில்நுட்ப பல்கலைக்கழகம் , ஃபோட்டானிக் குவாண்டம் அமைப்புகள் ,