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C24H18O3, monoclinic, P21/c (no. 14), a = 9.0474(7) Å, b = 19.9648(12) Å, c = 10.7153(3) Å, β = 104.175(2)°, V = 1876.6(3) Å3, Z = 4, Rgt(F) = 0.0459, wRref(F2) = 0.1183, T = 296 K.

C26H24N2O4Se2, monoclinic, C2/c (no. 15), a = 22.9092(7) Å, b = 5.8900(2) Å, c = 36.6209(9) Å, β = 91.983(3)°, V = 4938.5(3) Å3, Z = 8, R gt(F) = 0.0419, wR ref(F 2) = 0.1162, T = 293 K.

The intercalation of anthracene units into polythiophene backbone can significantly regulate the discoloration properties of polymers, but the high polymerization potential leads to poor film-forming quality and properties of polymers. In order to reduce the oxidation potential of monomers containing anthracene units, a monomer 9, 10-bis (2-thiophenyl) anthracene (Th-An-Th) was synthesized by Stille coupling reaction and electrochemically polymerized in polymerization solvent BFEE, BFEE + CF3COOH, LiClO4/ACN and LiClO4/PC, respectively. The results show that th an th is difficult to copolymerize by electrochemical reaction. However, it can be a good comonomer to obtain copolymers with other monomers such as thiophene (Th), 3-methylthiophene (MeTh), 3, 4-ethylenethiophene (EDOT) and selenophone (SePh) via electrochemical copolymerization. The copolymerized films are named as P1, P2, P3 and P4. Cyclic voltammetry and FTIR tests confirm the polymerization process and the characteristic structure of the copolymers. The spectroelectrochemical test results show that the series of copolymers have rich color conversion properties. P1, P3 and P4 films can change four colors under -0.6 V to 1.0 V scanning, and show good near-infrared discoloration ability. The copolymer film has fast switching response rate and good electrochemical stability. The bleaching and coloring response times of P4 film at 521 nm are 1.9 s and 3.4 s, respectively, and the optical contrast is 35.6%. After 210 switching cycles, the optical contrast of the copolymer is only lost by 2.3%, and the electrochemical activity of the copolymer remains 82% after 400 cycles.

CO2 mineralized all-solid waste alkali-activated cementitious materials can not only realize the storage of CO2 mineralized, but also shorten the curing cycle of alkali-activated cementitious materials and improve their compressive strength. It is a promising way of CO2 capture and utilization. The effects of the ratio of alkali-activated cementitious materials, mineralized curing pressure and mineralized curing time on the carbon fixation rate and compressive strength of CO2 mineralized cementitious materials were studied. The results show that the calcium carbide slag as alkali activator is more suitable for mineralization curing, and the sample with the highest Ca/Si ratio has the best carbon fixation ability under the same curing condition. Increasing the curing pressure and curing time of CO2 can improve the properties of the samples. Physical and chemical characterization test results show that, the microstructure of the mineralized samples is more compact than that of the natural curing samples, and the calcite-type calcium carbonate produced in the curing process is helpful to increase the compressive strength of the material. The research results provide basic data and reference for the development of CO2 mineralization curing technology of all-solid waste alkali-activated cementitious materials.

【Objective】 The objective is to clarify the soil nutrient supply capacity in wheat planting area of Shanxi Province and further provide theoretical basis for local wheat production with higher quality and efficiency. 【Method】 Three counties, including Hongtong, Xiangfen and Wenxi, were selected as the representative wheat planting areas in the study based on the data of Shanxi Statistical Yearbook 2018, and the soil samples of plough layer (0～20 cm) were collected according to the soil type, topographic feature and distribution of wheat area. The soil nitrate nitrogen, available phosphorus, available potassium, organic matter and six trace elements (Cu, Zn, Fe, Mn, Ni and Se) were analyzed. 【Result】 The content of soil nitrate nitrogen in typical wheat planting area was 1.9~115.2 mg/kg, with an average value of 35.14 mg/kg; the content of available phosphorus was 2.4~88 mg/kg, with an average value of 26.9 mg/kg; The content of available potassium was 97.1~579.2 mg/kg, with an average value of 297.9 mg/kg, the content of organic matter was 5.61~64.28 g/kg, with an average value of 21.65 g/kg In general, the soil nutrient content in this study were 1.26%~109.4% higher than that of the second soil survey of Shanxi Province. The content of Cu ranges from 16.09 to 59.71 mg/kg, with an average of 30.40 mg/kg; the content of Zn ranges from 57.88~198 mg/kg, with an average of 90.04 mg/kg; The content of Fe ranges from 2.30%~6.66%, with an average of 3.76%; the content of Mn ranges from 426 to 926.1 mg/kg, with an average of 660.24 mg/kg; the content of Ni ranges from 23.1 to 47.75 mg/kg, with an average of 34.80 mg/kg; the content of Se ranges from 0.017 to 1.354 mg/kg, with an average of 0.434 mg/kg. The contents of 6 trace elements increased by 10.82%~141.11% compared with the background values of soil elements in Shanxi Province, and the sequence of 6 trace element contents was Fe>Mn>Zn>Ni>Cu>Se. There was extremely significant correlation between the organic matter and available phosphorus and total Se in local soil. The spatial distribution of soil nutrients in wheat planting area showed the content of soil nitrate nitrogen, available phosphorus, available potassium of Xiangfen County were the highest, and the content of 6 trace elements of Wenxi County were the lowest. 【Conclusion】 After more than 30 years of soil evolution and fertilization management, the soil nutrient content in wheat planting area of Shanxi Province was significantly higher than that of second soil survey of Shanxi Province.

Astragalus is commonly used in health supplements, and its flavonoids and saponins are the important material basis for immune system enhancement. The study on the effective component contents and antioxidant capacities of astragalus extract after membrane separation lays the foundation of the application of membrane separation technology in health supplement development. The astragalus extract was filtered by suction and passed through membranes of 10000 Da, 2500 Da, and 600 Da to obtain retentate 1 (M1), retentate 2 (M2), retentate 3 (M3) and permeate MT. UV/vis spectrophotometer was used to compare the contents of total flavonoids and total saponins before and after each step of membrane separation. High performance liquid chromatography (HPLC) was used to analyze the contents of Verbasil Glucoside and Astragaloside IV of all membrane separation samples, and the antioxidant activities were determined. The contents of flavonoids in membrane separation samples were significantly different. In the freeze-dried powders obtained from the membrane separation, the contents of total flavonoids and Verbasil Glucoside were the lowest in MT, M1 was the highest, and M3 was the second highest. The order of contents of total saponins and Astragaloside IV of the freeze-dried powders from membrane separation was as follows: M3 > M1 > M2 > MT. Among them, the content of total saponins in the freeze-dried powder of M3 was the highest, which reached 2.67 times of that of the astragalus extract. The order of the scavenging activities of membrane separation samples for DPPH free radical was: MT > M3 > M2 > M1 > astragalus extract. The strongest scavenging activity of hydroxyl free radicals was found in M3, and the scavenging rates of hydroxyl free radicals in all samples were higher than those of VC. The total antioxidant capacity of FRAP showed a certain dose-effect relationship. At the same concentration, the FRAP values of M1 and MT were higher than other samples. Membrane separation technology can be used to separate and purify the effective components from astragalus extract. M3 has the highest contents of the total flavonoids and total saponins, and its antioxidant capacity is better than that of astragalus extract and other samples obtained by membrane separation.

Mothers have almost 100% certainty of their relationship with their offspring, but fathers face paternal uncertainty, which affects not only parental investment but also grandparents' investment in grandchildren. However, due to Chinese patriarchal culture and preference for sons, grandparents may give their grandchildren different investments by gender. To explore the psychological and behavioral mechanisms of grandparents' emotional investment in grandchildren from both cultural and evolutionary perspectives, this study collected data from 642 Chinese participants who had impressions of all four grandparents and measured their relationships with their grandparents and other demographic variables. After controlling for the number of grandchildren, participant's age, region, etc., a significant interaction between the grandchild's gender and grandparent categories was found. Simple effect analysis and post-hoc analysis showed significant differences in grandsons' intimacy with maternal grandmothers and grandfathers, but no other grandparents, while granddaughter's intimacy with maternal grandmothers was significantly higher and with paternal grandfathers significantly lower than with other grandparents, and there were no other significant differences. Those results support human psychology and behavior are jointly influenced by evolution and culture., Author(s): Mengjie Tu [sup.1] , Hongpo Zhang [sup.1] , Yafei Guo [sup.2] , Lin Zhang [sup.3] , Xinhui Wei [sup.4] , Quanlei Yu [sup.1] Author Affiliations: (1) grid.411407.7, 0000 0004 [...]