The mangrove plant Heritiera littoralis D. (Sterculi-aceae) is widelydistributed in southeastern Asia and traditionally used as a fish, arrowhead, and spearhead poison .It has also been used as a folk medicine to trea...The mangrove plant Heritiera littoralis D. (Sterculi-aceae) is widelydistributed in southeastern Asia and traditionally used as a fish, arrowhead, and spearhead poison .It has also been used as a folk medicine to treat he-maturia and diarrhea for a long history inChina . Past investigations on the chemical constituents of this plant have yielded fourtriterpenes, five sesquiterpenes, a phe-nylproanoid-glycerol and four flavonoids. In the presentstudy, eight flavonoids were isolated from the 95% EtOH extract of the leaves of this plant, andidentified as quercitrin (1), quercetin (2),kaempferol-3-O-(6″-O-E-p-coumaroyl)-β-D-glucopyranoside ( 3 ), kaempferol (4), kaempferitrin (5),myricetin (6), eriodictyol (7), and catechin (8) on the basis of their spectral data.展开更多
The effect of a modified ester collector named as BL on the flotation of chalcopyrite at low temperatures was investigated by micro-flotation tests,contact angle measurements,adsorption experiments,laser particle size...The effect of a modified ester collector named as BL on the flotation of chalcopyrite at low temperatures was investigated by micro-flotation tests,contact angle measurements,adsorption experiments,laser particle size analysis,cryogenic transmission electron microscopy(Cryo-TEM)and Fourier transform infrared(FTIR)analyses.Micro-flotation tests proved that the collecting ability of BL for chalcopyrite was significantly better than that of N,N-diethyl dithiocarbamate propiononitrile ester(ester-105)at low temperatures.Combined with laser particle size,Cryo-TEM and FTIR analyses,it was found that the particle size of BL in water was smaller than that of ester-105,and the distributed density of BL was higher than that of ester-105 at low temperatures,indicating that BL dispersed well at low temperatures.Therefore,BL was more easily adsorbed on the chalcopyrite surface and improved the surface hydrophobic degree of chalcopyrite,which were also confirmed by the contact angle measurements and adsorption experiments.展开更多
Thin films of CuInS2 were grown on glass reaction method with different [Cu]/[In] substrate by successive ionic layer adsorption and ratios and annealed at 400℃ for 30 rain. The crystal structure and grain sizes of t...Thin films of CuInS2 were grown on glass reaction method with different [Cu]/[In] substrate by successive ionic layer adsorption and ratios and annealed at 400℃ for 30 rain. The crystal structure and grain sizes of the thin films were characterized by X-ray diffraction method. Atomic force microscopy was used to determine surface morphology of the films. Optical and electrical properties of these films were investigated as a function of [Cu]/[In] ratios. The electrical resistivity of CuInS~ of thin films was determined using a direct current- two probe method in the temperature range of 300-470 K. It is observed that, the electrical resistivity values show a big decreasing with increasing [Cu]/[In] ratio. Hence, the [Cu]/[In] ratio in the solution can drastically affect the structural, electrical, and optical properties of thin films of CuInS2.展开更多
文摘The mangrove plant Heritiera littoralis D. (Sterculi-aceae) is widelydistributed in southeastern Asia and traditionally used as a fish, arrowhead, and spearhead poison .It has also been used as a folk medicine to treat he-maturia and diarrhea for a long history inChina . Past investigations on the chemical constituents of this plant have yielded fourtriterpenes, five sesquiterpenes, a phe-nylproanoid-glycerol and four flavonoids. In the presentstudy, eight flavonoids were isolated from the 95% EtOH extract of the leaves of this plant, andidentified as quercitrin (1), quercetin (2),kaempferol-3-O-(6″-O-E-p-coumaroyl)-β-D-glucopyranoside ( 3 ), kaempferol (4), kaempferitrin (5),myricetin (6), eriodictyol (7), and catechin (8) on the basis of their spectral data.
基金financial supports from the National Natural Science Foundation of China(No.52074206)the Talent Science and Technology Fund of Xi’an University of Architecture and Technology,China(No.ZR19062)+4 种基金the Open Foundation of State Key Laboratory of Mineral Processing,China(No.BGRIMM-KJSKL-2021-19)the Natural Science Basic Research Plan in Shaanxi Province of China(No.2021JQ-507)the Special Research Project of Shaanxi Education Department,China(No.21JK0731)the Key Program for International S&T Cooperation Projects of Shaanxi Province,China(No.2021KWZ-16)the Natural Science Foundation of Qinghai Province,China(No.2021-ZJ-975Q)。
文摘The effect of a modified ester collector named as BL on the flotation of chalcopyrite at low temperatures was investigated by micro-flotation tests,contact angle measurements,adsorption experiments,laser particle size analysis,cryogenic transmission electron microscopy(Cryo-TEM)and Fourier transform infrared(FTIR)analyses.Micro-flotation tests proved that the collecting ability of BL for chalcopyrite was significantly better than that of N,N-diethyl dithiocarbamate propiononitrile ester(ester-105)at low temperatures.Combined with laser particle size,Cryo-TEM and FTIR analyses,it was found that the particle size of BL in water was smaller than that of ester-105,and the distributed density of BL was higher than that of ester-105 at low temperatures,indicating that BL dispersed well at low temperatures.Therefore,BL was more easily adsorbed on the chalcopyrite surface and improved the surface hydrophobic degree of chalcopyrite,which were also confirmed by the contact angle measurements and adsorption experiments.
文摘Thin films of CuInS2 were grown on glass reaction method with different [Cu]/[In] substrate by successive ionic layer adsorption and ratios and annealed at 400℃ for 30 rain. The crystal structure and grain sizes of the thin films were characterized by X-ray diffraction method. Atomic force microscopy was used to determine surface morphology of the films. Optical and electrical properties of these films were investigated as a function of [Cu]/[In] ratios. The electrical resistivity of CuInS~ of thin films was determined using a direct current- two probe method in the temperature range of 300-470 K. It is observed that, the electrical resistivity values show a big decreasing with increasing [Cu]/[In] ratio. Hence, the [Cu]/[In] ratio in the solution can drastically affect the structural, electrical, and optical properties of thin films of CuInS2.
