Solution Structure of (rGCGGACGC)2by Two-Dimensional NMR and the Iterative Relaxation Matrix Approach†

Biochemistry ◽  
1996 ◽  
Vol 35 (30) ◽  
pp. 9677-9689 ◽  
Author(s):  
Ming Wu ◽  
Douglas H. Turner
Keyword(s):  
Solution Structure ◽  
Two Dimensional ◽  
Matrix Approach ◽  
Relaxation Matrix

Solution Structure of (rGGCAGGCC)2by Two-Dimensional NMR and the Iterative Relaxation Matrix Approach†,‡

Biochemistry ◽  
1997 ◽  
Vol 36 (15) ◽  
pp. 4449-4460 ◽  
Author(s):  
Ming Wu ◽  
John SantaLucia, ◽  
Douglas H. Turner
Keyword(s):  
Solution Structure ◽  
Two Dimensional ◽  
Matrix Approach ◽  
Relaxation Matrix

scholarly journals “Ensemble” iterative relaxation matrix approach: A new NMR refinement protocol applied to the solution structure of crambin

1993 ◽  
Vol 15 (4) ◽  
pp. 385-400 ◽  
Author(s):  
Alexandre M. J. J. Bonvin ◽  
J. Antoon C. Rullmann ◽  
Rolf M. J. N. Lamerichs ◽  
Rolf Boelens ◽  
Robert Kaptein
Keyword(s):  
Solution Structure ◽  
Matrix Approach ◽  
Relaxation Matrix

Selective dismantling of closo-1,2-C2B10H12 to lower-cage dicarbaborane systems

1991 ◽  
Vol 56 (8) ◽  
pp. 1618-1635 ◽  
Author(s):  
Jaromír Plešek ◽  
Bohumil Štíbr ◽  
Xavier L. R. Fontaine ◽  
John D. Kennedy ◽  
Stanislav Heřmánek ◽  
...  
Keyword(s):  
Nmr Spectroscopy ◽  
Solution Structure ◽  
High Yield ◽  
Two Dimensional ◽  
Oxidizing Agents ◽  
Elimination Reactions

A modified, high-yield synthesis of the two isomeric nido twelve-vertex [C2B10H13]- anions, "reactive" [nido-7,9-C2B10H13]- and "unreactive" [nido-7,12-C2B10H13]-, has been developed. A solution structure for the reactive [nido-7,9-C2H10B13]- isomer is proposed on the basis of the result of two-dimensional 11B and 1H correlation NMR spectroscopy. It is concluded that there is a marked similarity between this species and the eleven-vertex congener [nido-7,8-C2B9H12]-. In accord with this parallel, the "reactive" twelve-vertex species is found to undergo selective boron-vertex elimination reactions in the presence of oxidizing agents. These reactions give excellent yields of smaller-cage nido dicarbaborane compounds, namely [nido-7,8-C2B9H12]-, [9-(SMe2)-nido-7,8-C2B9H11], and nido-5,6-C2B8H12. NMR spectroscopy assigns cluster 11B and 1H resonances for all the compounds isolated, and thence permits comparison with the equivalent shielding patterns of structurally related analogues such as [nido-7-CB10H13]- and [nido-7,9-C2B9H12]-.

Improved resistance matrix approach for readout of the two-dimensional resistive sensor array

2018 ◽  
Vol 41 (3) ◽  
pp. 875-882 ◽  
Author(s):  
Jian-Feng Wu ◽  
Shang-Shang He ◽  
Feng Wang ◽  
Yu Wang ◽  
Xin-Gang Zhao ◽  
...  
Keyword(s):  
Measurement Error ◽  
Sensor Arrays ◽  
Circuit Complexity ◽  
Low Complexity ◽  
Two Dimensional ◽  
Matrix Approach ◽  
Readout Circuit ◽  
Readout Circuits ◽  
Resistive Sensor ◽  
Resistance Matrix

In the readout circuits of the two-dimensional (2-D) resistive sensor arrays, various auxiliary electrical components were used to reduce their crosstalk errors but resulted in increased circuit complexity. Readout circuits with low-complexity structures were necessary for wearable electronic applications. With only several resistors and a microcontroller, readout circuit based on resistance matrix approach (RMA) achieved low complexity but suffered from small resistance range and large measurement error caused by the output ports’ internal resistances of the microcontroller. For suppressing those negative effects, we firstly proposed an improved resistance matrix approach (IRMA) by additionally sampling the voltages on all driving row electrodes in the RMA. Then the effects of the output ports’ internal resistances and the analog-to-digital converter’s accuracy for the RMA and the IRMA were simulated respectively with NI Multisim 12. Moreover, a prototype readout circuit based on the IRMA was designed and tested in actual experiments. The experimental results demonstrated that the IRMA, though it required more sampling channels and more computations, could be used in those applications needing low complexity, small measurement error and wide resistance range.

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