Ultrasonic time-of-flight method for on-line quantitation of in situ generated arsine

1991 ◽  
Vol 63 (4) ◽  
pp. 366-369 ◽  
Author(s):  
J. L. Valdes ◽  
Gardy. Cadet
2015 ◽  
Vol 11 (A29A) ◽  
pp. 305-306
Author(s):  
Marko Förstel ◽  
Ralf I. Kaiser

AbstractExploiting reflectron time of flight mass spectrometry coupled with single photon ionization of the subliming molecules (PI-ReTOF-MS) during the temperature programmed desorption (TPD) and combining these data with on line and in situ infrared spectroscopy (FTIR), a versatile experimental approach has been established to elucidate the formation pathways of complex organic molecules in interstellar analog ices upon interaction with ionizing radiation at astrophysically relevant temperatures as low as 5 K.


Sensors ◽  
2016 ◽  
Vol 16 (12) ◽  
pp. 2083 ◽  
Author(s):  
Mingzhang Luo ◽  
Weijie Li ◽  
Chuang Hei ◽  
Gangbing Song

1980 ◽  
Vol 4 (1) ◽  
pp. 1-11 ◽  
Author(s):  
K. Feldmann ◽  
M. Betzl ◽  
A. Andreeff ◽  
K. Hennig ◽  
K. Kleinstück ◽  
...  

The adaptability of time-of-flight neutron diffraction for quantitative texture analysis is demonstrated. Measurements with this technique on drawn steel wire show good agreement with the results from conventional neutron diffraction experiments. A short description of the neutron time-of-flight method is given. Its application for texture investigations especially on low-symmetry crystalline systems, multiphase materials and for in situ studies is discussed.


Author(s):  
M.A. O’Keefe ◽  
J. Taylor ◽  
D. Owen ◽  
B. Crowley ◽  
K.H. Westmacott ◽  
...  

Remote on-line electron microscopy is rapidly becoming more available as improvements continue to be developed in the software and hardware of interfaces and networks. Scanning electron microscopes have been driven remotely across both wide and local area networks. Initial implementations with transmission electron microscopes have targeted unique facilities like an advanced analytical electron microscope, a biological 3-D IVEM and a HVEM capable of in situ materials science applications. As implementations of on-line transmission electron microscopy become more widespread, it is essential that suitable standards be developed and followed. Two such standards have been proposed for a high-level protocol language for on-line access, and we have proposed a rational graphical user interface. The user interface we present here is based on experience gained with a full-function materials science application providing users of the National Center for Electron Microscopy with remote on-line access to a 1.5MeV Kratos EM-1500 in situ high-voltage transmission electron microscope via existing wide area networks. We have developed and implemented, and are continuing to refine, a set of tools, protocols, and interfaces to run the Kratos EM-1500 on-line for collaborative research. Computer tools for capturing and manipulating real-time video signals are integrated into a standardized user interface that may be used for remote access to any transmission electron microscope equipped with a suitable control computer.


2020 ◽  
Author(s):  
Feifei Jia ◽  
Jie Wang ◽  
Yanyan Zhang ◽  
Qun Luo ◽  
Luyu Qi ◽  
...  

<p></p><p><i>In situ</i> visualization of proteins of interest at single cell level is attractive in cell biology, molecular biology and biomedicine, which usually involves photon, electron or X-ray based imaging methods. Herein, we report an optics-free strategy that images a specific protein in single cells by time of flight-secondary ion mass spectrometry (ToF-SIMS) following genetic incorporation of fluorine-containing unnatural amino acids as a chemical tag into the protein via genetic code expansion technique. The method was developed and validated by imaging GFP in E. coli and human HeLa cancer cells, and then utilized to visualize the distribution of chemotaxis protein CheA in E. coli cells and the interaction between high mobility group box 1 protein and cisplatin damaged DNA in HeLa cells. The present work highlights the power of ToF-SIMS imaging combined with genetically encoded chemical tags for <i>in situ </i>visualization of proteins of interest as well as the interactions between proteins and drugs or drug damaged DNA in single cells.</p><p></p>


Sign in / Sign up

Export Citation Format

Share Document