The highly-dispersed iron element decorated Ni foam was prepared by simple immersion in a ferric nitrate solution at room temperature without using acid etching, and characterized by X-ray powder diffraction(XRD), sca...The highly-dispersed iron element decorated Ni foam was prepared by simple immersion in a ferric nitrate solution at room temperature without using acid etching, and characterized by X-ray powder diffraction(XRD), scanning electron microscopy(SEM), EDAX spectrum(EDAX mapping) and Raman spectroscopy. The EDAX spectrum illustrated that iron element was highly-dispersed over the entire surface of nickel foam, and the Raman spectroscopy revealed that both Ni-O and Fe-O bonds were formed on the surface of the as-prepared electrode. Moreover, the iron element decorated Ni foam electrode can be used as non-enzymatic glucose sensor and it exhibits not only an ultra-wide linear concentration range of 1-18 mmol/L with an outstanding sensitivity of 1.0388 m A·mmol/(L·cm2), but also an excellent ability of stability and selectivity. Therefore, this work presents a simple yet effective approach to successfully modify Ni foam as non-enzymatic glucose sensor.展开更多
It is investigated of the effect of plant blackberry （Rubus caucasicus Focke and Rubus anatolicus L.） flower, fruit and leaf content of phenol compounds qualitative and quantitative HPLC （high-pressure liquid chrom...It is investigated of the effect of plant blackberry （Rubus caucasicus Focke and Rubus anatolicus L.） flower, fruit and leaf content of phenol compounds qualitative and quantitative HPLC （high-pressure liquid chromatography） and spectral methods. HPLC analysis revealed that the fetus was a major of both species, cyanidin-3-glucoside, and it reached full maturity period 1,493.54 ± 44.81 and 1,636.58 ±49.10 mg/kg （cyanidin-3-O-glucoside chloride equivalents） calculated on the dry weight. In mature fetus flavonols is （884.8±26.54）-（979.0 ± 29.37） mg/kg （rutin equivalents） calculated on the dry weight, catechins （21.2± 0.64）-（25.01 ± 0.7537） mg/kg （（＋） catechin equivalents） calculated on the dry weight, leucoantocyanins （48.8 ±1.46）-（52.1± 1.56） mg/kg （cyanidin equivalents） calculated on the dry weight. In this regard, there was a slight difference between the species. Most of the leaf flavonols were presented 3.7 ± 0.111 g/kg. Phenol carbonic acids--the leaves of 13.4 ± 0.402 mg/kg calculated on the dry weight, the flowers of 8.8± 0.264 mg/kg, calculated on the dry weight. Full maturity period, the number of phenol carbonic acids cent is （3,707.8 ± 111.23）-（4,287.5 ± 128.63） mg/kg, （caffeic acid equivalents） is calculated on the dry weight of the unit. Also been determined HPLC following the method of compounds is： cyanidin-3-glucoside, quercetin-3-rutinoside, quercetin-3-glucoside, ellagic acid, gallic acid and chlorogenic acid.展开更多
基金Project(2019zzts684)supported by the Fundamental Research Funds for the Central Universities,China。
文摘The highly-dispersed iron element decorated Ni foam was prepared by simple immersion in a ferric nitrate solution at room temperature without using acid etching, and characterized by X-ray powder diffraction(XRD), scanning electron microscopy(SEM), EDAX spectrum(EDAX mapping) and Raman spectroscopy. The EDAX spectrum illustrated that iron element was highly-dispersed over the entire surface of nickel foam, and the Raman spectroscopy revealed that both Ni-O and Fe-O bonds were formed on the surface of the as-prepared electrode. Moreover, the iron element decorated Ni foam electrode can be used as non-enzymatic glucose sensor and it exhibits not only an ultra-wide linear concentration range of 1-18 mmol/L with an outstanding sensitivity of 1.0388 m A·mmol/(L·cm2), but also an excellent ability of stability and selectivity. Therefore, this work presents a simple yet effective approach to successfully modify Ni foam as non-enzymatic glucose sensor.
基金Acknowledgments The authors express their gratitude to Shota Rustaveli National Science Foundation （Grant GNSF/ST8/513） for financial provision.
文摘It is investigated of the effect of plant blackberry （Rubus caucasicus Focke and Rubus anatolicus L.） flower, fruit and leaf content of phenol compounds qualitative and quantitative HPLC （high-pressure liquid chromatography） and spectral methods. HPLC analysis revealed that the fetus was a major of both species, cyanidin-3-glucoside, and it reached full maturity period 1,493.54 ± 44.81 and 1,636.58 ±49.10 mg/kg （cyanidin-3-O-glucoside chloride equivalents） calculated on the dry weight. In mature fetus flavonols is （884.8±26.54）-（979.0 ± 29.37） mg/kg （rutin equivalents） calculated on the dry weight, catechins （21.2± 0.64）-（25.01 ± 0.7537） mg/kg （（＋） catechin equivalents） calculated on the dry weight, leucoantocyanins （48.8 ±1.46）-（52.1± 1.56） mg/kg （cyanidin equivalents） calculated on the dry weight. In this regard, there was a slight difference between the species. Most of the leaf flavonols were presented 3.7 ± 0.111 g/kg. Phenol carbonic acids--the leaves of 13.4 ± 0.402 mg/kg calculated on the dry weight, the flowers of 8.8± 0.264 mg/kg, calculated on the dry weight. Full maturity period, the number of phenol carbonic acids cent is （3,707.8 ± 111.23）-（4,287.5 ± 128.63） mg/kg, （caffeic acid equivalents） is calculated on the dry weight of the unit. Also been determined HPLC following the method of compounds is： cyanidin-3-glucoside, quercetin-3-rutinoside, quercetin-3-glucoside, ellagic acid, gallic acid and chlorogenic acid.
