نتایج جستجو برای: sulfur hexafluoride

تعداد نتایج: 32829  

Journal: :Chemical communications 2015
Martin Pawliczek Lennart K B Garve Daniel B Werz

Benzodithioloimines are reacted with arynes or alkynes substituted with electron-withdrawing groups to afford the corresponding thianthrene or benzo[b][1,4]dithiine derivatives. The transformation takes place under mild reaction conditions without any transition metal. Furthermore, the reaction mode could be expanded to 2-thiocyanatopyrroles yielding pyrrolothiazoles.

2010
Masashi Handa Yuya Shinohara Hiroyuki Kishimoto Yusuke Tamenori Yoshiyuki Amemiya

Anomalous small-angle X-ray scattering (ASAXS) is expected to be a powerful and vital tool for the structural study of soft matter. We investigated feasibility of ASAXS near sulphur K absorption edge at SPring-8. Scattering pattern was successfully obtained and the dependence of scattering intensity on the energy of X-ray well agreed with the calculated one. This study can be the basis of struc...

Journal: :Nature communications 2013
Zhi Wei Seh Weiyang Li Judy J Cha Guangyuan Zheng Yuan Yang Matthew T McDowell Po-Chun Hsu Yi Cui

Sulphur is an attractive cathode material with a high specific capacity of 1,673 mAh g(-1), but its rapid capacity decay owing to polysulphide dissolution presents a significant technical challenge. Despite much efforts in encapsulating sulphur particles with conducting materials to limit polysulphide dissolution, relatively little emphasis has been placed on dealing with the volumetric expansi...

1997
E. S. Hernández J. Navarro

Using a finite-range density functional, we have investigated the energetics and structural features of mixed helium clusters. The possibility of doping the cluster with a molecule of sulfur hexafluoride is also considered. It is seen that the repulsion introduced by the impurity strongly modifies the properties of the smallest drops. Although only a qualitative comparison is possible, the gros...

Journal: :Archivos de la Sociedad Espanola de Oftalmologia 2009
F Poyales-Galán A Fernández-Aitor-García N Garzón-Jiménez B Ortiz-de-Zárate V Elipe-Gosálvez

CASE REPORT Hydrops occurring in the eye secondary to keratoconus, grade 4. It was managed by sulfur hexafluoride (SF6) gas injected into the anterior chamber, with an early resolution of corneal edema obtained. DISCUSSION Intervention with intracameral SF6 injection has proven to be a safe and effective therapy for early reduction of corneal edema in an eye with Descemet's membrane detachmen...

2010
Chunxiao Wang

Two analytical methods based on the Agilent 7890A GC system are developed for simultaneous analysis of methane (CH4), carbon dioxide (CO2), nitrous oxide (N2O) in air samples. Each system has its own features to meet different requirements of greenhouse gases analyses. Both systems can easily be expanded to determine sulfur hexafluoride (SF6). Results from both methods demonstrated high sensiti...

2017
Gilbert WS Simanjuntak Golda A M Simanjuntak

METHODS A retrospective study on medical records of patients who had undergone macular hole surgery under local anesthesia. Funduscopic examination of macular hole had been performed and all other diseases with deterioration of visual acuity eliminated. Surgery was performed under retrobulbar local anesthesia, using 2 ml of 2% lidocaine mixed with 3 ml bupivacaine in one syringe. Vitreous tampo...

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