Signature for chiral-symmetry breaking at high temperatures

Chang, Lay Nam; Chang, Ngee-Pong; Chou, Kuang-Chao

doi:10.1142/9789814280389_0073

Cited by 8 publications

(10 citation statements)

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“…45 Extensive research has been undertaken by researchers in this field with the specific capacitance reported to reach more than 1300F/g. 36,43,[46][47][48][49][50][51][52][53][54][55][56][57] 36 They obtained ruthenium oxide which exhibited a ultrahigh specific capacitance (1300 F g 21 ), excellent charge/discharge behaviour at 1000 mV s 21 , and high-frequency (4.0-7.8 kHz) capacitive responses, which were much higher than any value ever reported before. Some typical synthesis methods and synthesising processes of RuO 2 are given in Table 3 and Fig.…”

Section: Synthesis Methods Of Ruomentioning

confidence: 99%

Electrochemical capacitors utilising transition metal oxides: an update of recent developments

et al. 2011

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Transition metal oxides receive considerable attention in the area of electrochemistry not only due to their beneficial reported structural, mechanical or electronic properties, but because of their capacitive properties ascribed to their multiple oxide states they exhibit pseudo capacitances which carbon counterparts generally cannot. Typically transition metal oxides may be classified as noble transition metal oxides which exhibit excellent capacitive properties but have the drawback of generally being relatively expensive. Alternatively base metal oxides may also be utilised which are considerably cheaper and more environment friendly than noble transition metals as well as exhibiting good capacitive properties. In considering that nanostructured materials can help ameliorate the electrochemical performances of transition metal oxides, this review summarizes the recent investigations of fundamental advances in understanding the electrochemical reactivity of transition metal oxides, thus leading to an improved capacitive performance, which is essential for their continual use in a plethora of supercapacitor applications.

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Section: Synthesis Methods Of Ruomentioning

confidence: 99%

Electrochemical capacitors utilising transition metal oxides: an update of recent developments

et al. 2011

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“…On the contrary, as an element in another "cementing unit" of the intra-dimer assembly, β30Arg shows consistently high backbone rigidity in both deoxy and CO forms. However, α122His, a member of this second intra-dimer triangle locking region, along with α103His, has been found to be structurally more stabilized in the R state than the T state by solvent exchange methods, implying a dynamic variation of certain degree, though less significant than in the α31Arg-β123Thr case (50,51). For this second triangle network, as for the first one involving α31Arg and β123Thr, X-ray crystallography gives no evidence of the removal of surrounding interactions (H-bond or salt bridges) of α122His in the T state (48).…”

Section: ) Interfacesmentioning

confidence: 99%

A Comparative NMR Study of the Polypeptide Backbone Dynamics of Hemoglobin in the Deoxy and Carbonmonoxy Forms

et al. 2007

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Model-free-based NMR dynamics studies have been undertaken for polypeptide backbone amide N-H bond vectors for both the deoxy and carbonmonoxy forms of chain-specific, isotopically (15N and 2H) labeled tetrameric hemoglobin (Hb) using 15N-relaxation parameters [longitudinal relaxation rate (R1), transverse relaxation rate (R2), and heteronuclear nuclear Overhauser effect (NOE)] measured at two temperatures (29 and 34 degrees C) and two magnetic field strengths (11.7 and 14.1 T). In both deoxy and carbonmonoxy forms of human normal adult hemoglobin (Hb A), the amide N-H bonds of most amino acid residues are rigid on the fast time scale (nanosecond to picosecond), except for the loop regions and certain helix-helix connections. Although rigid in deoxy-Hb A, beta146His has been found to be free from restriction of its backbone motions in the CO form, presumably due to the rupture of its hydrogen bond/salt bridge network. We now have direct dynamics evidence for this structural transition of Hb in solution. While remarkably flexible in the deoxy state, alpha31Arg and beta123Thr, neighbors in the intradimer (alpha1beta1) interface, exhibit stiffening upon CO binding. These findings imply a role for alpha31Arg and beta123Thr in the intradimer communication but contradict the results from X-ray crystallography. We have also found that there is considerable flexibility in the intradimer (alpha1beta1) interface (i.e., B, G, and H helices and the GH corner) and possible involvement of several amino acid residues (e.g., alpha31Arg, beta3Leu, beta41Phe, beta123Thr, and beta146His) in the allosteric pathway. Several amino acid residues at the intradimer interfaces, such as beta109Val, appear to be involved in possible conformational exchange processes. The dynamic picture derived from the present study provides new insights into the traditional description of the stereochemical mechanism for the cooperative oxygenation of Hb A based on X-ray crystallographic results.

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“…Among the well-known pseudocapacitor materials, hydrous RuO 2 (.700 F g 21 ) has shown the best performance. 5,[20][21][22][23][24] However, its industrial application is limited due to its high cost. Considerable effort is being devoted to developing inexpensive electrode materials with high specific capacitance.…”

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confidence: 99%

Aligned nickel-cobalt hydroxide nanorod arrays for electrochemical pseudocapacitor applications

et al. 2012

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Signature for chiral-symmetry breaking at high temperatures

Cited by 8 publications

References 0 publications

Electrochemical capacitors utilising transition metal oxides: an update of recent developments

Electrochemical capacitors utilising transition metal oxides: an update of recent developments

A Comparative NMR Study of the Polypeptide Backbone Dynamics of Hemoglobin in the Deoxy and Carbonmonoxy Forms

Aligned nickel-cobalt hydroxide nanorod arrays for electrochemical pseudocapacitor applications

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