A VS2/aptamer-based cytochromecsensor was successfully constructed by first applying the DNA-adsorbing ability/fluorescence-quenching properties of VS2in bioanalysis.
A novel photoelectrode based on ZnS/CdTe/Mn-CdS/ZnS-sensitized three-dimensional macroporous ZnO nanosheet (NS) has been prepared by electrodeposition and successive ion layer adsorption and reaction (SILAR) method. The photoelectrode performances were significantly improved through the coupling of the core/shell CdTe/Mn-CdS quantum dots (QDs) with ZnO NS, and the introduction of the ZnS layer as a potential barrier. The photocurrent density systematically increases from ZnO NS (0.45 mA/cm(2)), CdTe/Mn-CdS/ZnO NS (4.98 mA/cm(2)), to ZnS/CdTe/Mn-CdS/ZnS/ZnO (6.23 mA/cm(2)) under the irradiation of AM 1.5G simulated sunlight. More important, the ZnS/CdTe/Mn-CdS/ZnS-sensitized ZnO NS photoelectrode provides a remarkable photoelectrochemical cell efficiency of 4.20% at -0.39 V vs Ag/AgCl.
Give chrome shavings an alkaline treatment using CaO and MgO together to extract the gelatin. Then protein polypeptide is extracted by hydrolyze the residue, which is left in the first step, with 1398 neutral proteinase. The best process condition is that when the usage of CaO is 3% (base on the mass of chrome shavings), MgO is 3%, H 2 O is 300%, hydrolysis temperature is 80 , and the reaction time is 4h, The extraction efficiency of the gelatin is more than 40%; When the quantity of the Enzymes is 0.125%, and the hydrolysis temperature is 46 , the extraction efficiency of the protein polypeptide can reach to 20%. The quantity of Cr 2 O 3 in both gelatin and protein polypeptide are lower than 50mg/kg, and the content of ashes is lower than 2%.
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