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BackgroundThe teaching support work of normal school students is a key step to improving students’ personal teaching abilities. It can help students understand the current situation of education in China and is a necessary way to enhance students’ sense of responsibility and mission in teaching. However, a large number of students will have significant mental symptoms such as depression and anxiety during teaching. Therefore, doing a good job in students’ mental health is not only conducive to teachers’ psychological construction, but also can promote students to develop a good outlook on education.Subjects and Methods118 voluntary students in a university were taken as the research objects, and all the students were divided into an experimental group and a control group, with 59 students in each group. The intervention means based on the transformation of the management mode of psychotherapy combined with education were proposed. The students in the experimental group used the combined treatment means, while the students in the control group only used psychotherapy for intervention. The intervention lasted for 12 months, and the changes in anxiety and depression symptoms of students during the intervention were evaluated.ResultsThe differences in anxiety and depression scores of students before and after the treatment are shown in Table 1.Table 1.Changes in scores of psychological depression and anxiety in two groups of studentsTime (month)Anxiety scoreDepression scoreBefore interventionAfter interventionBefore interventionAfter interventionExperimental group65.57±2.3124.54±2.1966.98±2.2922.67±1.89Control group64.32±2.1148.42±1.9965.73±2.2247.33±1.62P>0.05>0.05ConclusionsThe psychological condition of the students is the key to deciding whether their voluntary activities can be carried out normally. It can be seen from Table 1 that the depression and anxiety scores of students in the experimental group are significantly lower than those in the control group after the intervention. Therefore, it can be seen that the transformation of the management mode of psychotherapy combined with education can significantly reduce the current situation of psychological depression and anxiety of students in the support education, which is of great significance to the comprehensive development of students.AcknowledgementThe research is supported by: The key commissioned project of Higher Education Teaching Reform of Heilongjiang Province in 2021: “The Research on the Effective Connecting Mode and the Implementation Path of Local Application-Oriented Universities’ Assistance in Poverty Alleviation and Rural Revitalization in Border Underdeveloped Areas” (the Fund Number: SJGZ20210047); The key project of Education Science Planning of Heilongjiang Province in 2021: The Research on the “Cross-border Integration” Talent Training Path of Specialty Groups of Tourism, Trade, Economy and Management of Special Application-oriented Undergraduate Demonstration Universities to Russia (the Fund Number: GJB1421625).

Aluminum (Al) stress in acidic soils has severe negative effects on crop productivity. In this study, the alleviating effect and related mechanism of malate on Al stress in quinoa (Chenopodium quinoa) seedlings were investigated. The findings indicated that malate alleviated the growth inhibition of quinoa seedlings under Al stress, maintained the enzymatic and nonenzymatic antioxidant systems, and aided resistance to the damage caused by excessive reactive oxygen species (ROS). Under Al stress, malate significantly increased the contents of chlorophyll and carotenoids in quinoa shoots by 103.8% and 240.7%, and significantly increased the ratios of glutathione (GSH)/oxidized glutathione (GSSG), and ascorbate (AsA)/dehydroascorbate (DHA) in roots by 59.9% and 699.2%, respectively. However, malate significantly decreased the superoxide radical (O

Drought stress is a key agricultural problem that restricts plant development and crop yield. Research on quinoa (Chenopodium quinoa), a nutrient-rich crop with strong stress resistance, has been limited in terms of the molecular regulation of its adaptation to drought stress. This study identified the zinc finger-homeodomain (ZF-HD) family in quinoa and a drought-responsive Chenopodium quinoa ZF-HD14 (CqZF-HD14) through expression profiles. Transient overexpression of CqZF-HD14 promotes photosynthetic pigment accumulation under drought stress, strengthens the antioxidant system, and in turn enhances drought tolerance. Comprehensive genome-wide family analysis and expression profiling identified CqNAC79 and CqHIPP34 regulated by CqZF-HD14, and their interactions were further determined by bimolecular fluorescence complementation (BIFC). Moreover, physiological and biochemical analyses and transient overexpression also revealed that CqNAC79 and CqHIPP34 resist drought by promoting the accumulation of photosynthetic pigments and maintaining antioxidant capacity under drought stress. The synergistic effect of CqZF-HD14 with CqNAC79 or CqHIPP34 further enhanced the drought tolerance of quinoa seedlings. Taken together, the results indicate that CqZF-HD14, CqNAC79 and CqHIPP34 may be important contributors to the drought tolerance regulatory network in quinoa, and these findings add new members to the drought tolerance gene pool.

Cadmium (Cd) has a serious negative impact on crop growth and human food security. This study investigated the alleviating effect of β-cyclocitral, a potential heavy metal barrier, on Cd stress in quinoa seedlings and the associated mechanisms. Our results showed that β-cyclocitral alleviated Cd stress-induced growth inhibition in quinoa seedlings and promoted quinoa seedling root development under Cd stress. Moreover, it maintained the antioxidant system of quinoa seedlings, including the enzymatic, i.e., superoxide dismutase (SOD), peroxidase (POD), catalase (CAT), ascorbate peroxidase (APX), and nonenzymatic, i.e., reduced glutathione (GSH) and ascorbic acid (ASA), antioxidants, which eliminate the damage from excessive reactive oxygen species (ROS). Our results showed that β-cyclocitral could reduce the amount of Cd absorbed by roots. Furthermore, we systematically identified five transporter families from the quinoa genome, and the RT-qPCR results showed that ZIP, Nramp and YSL gene families were downregulated by β-cyclocitral to reduce Cd uptake by roots. Thus, β-cyclocitral promoted the growth, photosynthetic capacity and antioxidant capacity of the aboveground parts of quinoa seedlings. Taken together, these results suggested that the β-cyclocitral-induced decrease in Cd uptake may be caused by the downregulation of several selected transporter genes.

In recent years, high strength linepipe needs high longitudinal deformability to meet the requirements of strain-based design pipeline employed when passing through geologic hazard-prone regions, such as seismic areas, landslide zones, permafrost zones, etc. The geologic hazard section of the natural gas pipeline from Myanmar to China is going to utilize a strain-based design. Linepipes with high deformability are required in these areas. The microstructures with different phases and the effect of the microstructure on deformability of pipeline steel were studied. Based on a dual phase of ferrite and banite microstructure design, the X70 grade UOE linepipe with low yield-tensile strength ratio, good uniform elongation and high stress ratio were developed. Two dimensions of UOE linepipe for the strain-based design area of Myanmar-China pipeline project, which were 1016mm O.D. and 17.5mm W.T., 1016 mm O.D. and 21.0mm W.T., were industrially trial-produced. The transverse properties of the trial produced linepipes meet the requirements of X70 steel grade of API Specification 5L. And also the linepipe has good toughness, the Charpy impact energy at −5°C is more than 200J, and the shear fracture area of DWTT test is more than 85% at 0°C. The longitudinal tensile properties of the trial produced linepipe exhibit good deformability. The stress-strain curve shows a typical round-house shape, the uniform elongation u-EL% is more than 7%, the yield-tensile strength ratio is lower than 0.80, the stress ratios of Rt1.5/Rt0.5, Rt2.0/Rt1.0 and Rt5.0/Rt1.0 are more than 1.100, 1.040 and 1.088 respectively. The properties of the linepipe after aging at 200°C for 5min to simulate the coating process of the pipe were also investigated. The results show that the linepipe trial-produced has good strain-aging resistance.