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铜尾矿区重金属污染土壤的植物修复技术研究进展

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绿色科技 2024年第10期26卷 205-210页

作者：范艺璇蒋太国朱艳芬郭芸杉丁正方孙吕云南铜业股份有限公司矿山研究院云南昆明650224

随着铜矿资源的持续开发利用,尾矿区周围土壤的重金属污染问题愈来愈严重,当务之急是寻找一种既成本低廉又环保的重金属污染土壤处理技术。植物修复技术因其低成本、无二次污染、工艺简单等优势而被广泛应用于重金属污染土壤的修复研究... 详细信息

随着铜矿资源的持续开发利用,尾矿区周围土壤的重金属污染问题愈来愈严重,当务之急是寻找一种既成本低廉又环保的重金属污染土壤处理技术。植物修复技术因其低成本、无二次污染、工艺简单等优势而被广泛应用于重金属污染土壤的修复研究。对适用于铜尾矿区重金属污染土壤修复的特定植物类型如豆科植物、菊科植物、地被植物和观赏植物进行了总结,阐述了各类型植物修复铜尾矿重金属污染土壤的潜在优势以及单一植物修复技术的缺陷,并介绍了进一步结合动物法、化学法和微生物法对重金属污染土壤进行联合修复的研究进展,最后对植物修复及联合植物修复技术的研究方向提出展望。

关键词：铜尾矿重金属污染土壤污染植物修复联合修复

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云南某多金属矿铜铅混合浮选工艺试验研究

现代矿业 2024年第3期40卷 160-162,170页

作者：孙吕陈艳平蒋太国朱艳芬郭芸杉丁正方云南铜业股份有限公司矿山研究院

为提高云南某铜铅锌多金属矿的选矿指标,降低选矿药剂成本,提升经济效益,在矿石性质研究的基础上,进行了铜铅混合浮选工艺试验研究。试验结果表明:在捕收剂丁基黄药+Z-200用量为(50+30)g/t,锌抑制剂硫酸锌+亚硫酸钠用量为(600+300)g/t,... 详细信息

为提高云南某铜铅锌多金属矿的选矿指标,降低选矿药剂成本,提升经济效益,在矿石性质研究的基础上,进行了铜铅混合浮选工艺试验研究。试验结果表明:在捕收剂丁基黄药+Z-200用量为(50+30)g/t,锌抑制剂硫酸锌+亚硫酸钠用量为(600+300)g/t,起泡剂BK204用量为30 g/t,一段磨矿细度为-0.074 mm80%,粗精矿再磨细度为-0.032 mm90%的条件下,经1粗2扫、1粗精再磨2精的铜铅混合浮选流程,可获得铜品位12.06%、铅品位18.85%、锌品位6.14%、铜回收率87.98%、铅回收率85.33%、锌回收率4.22%的铜铅混合精矿。

关键词：铜铅混浮铜铅锌硫化矿浮选药剂捕收剂

云南某低品位高自然铜型难选氧化铜矿选矿工艺研究

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湖南有色金属 2024年第2期40卷 8-12页

作者：蒋太国骆忠丁正方郭芸杉朱艳芬周仕庆孙吕云南铜业股份有限公司矿山研究院云南昆明650224 玉溪矿业有限公司云南玉溪653100

针对云南某低品位高自然铜型难选氧化铜矿,分别采用摇床重选、细筛筛选、集中浮选、混合浮选进行探索性试验研究。试验结果表明混合浮选是处理该矿石的最佳选别工艺,当该矿石与其它两矿段矿石以供矿占比为12%进行混合浮选,在生产工艺条... 详细信息

针对云南某低品位高自然铜型难选氧化铜矿,分别采用摇床重选、细筛筛选、集中浮选、混合浮选进行探索性试验研究。试验结果表明混合浮选是处理该矿石的最佳选别工艺,当该矿石与其它两矿段矿石以供矿占比为12%进行混合浮选,在生产工艺条件下,闭路试验可以获得回收率为79.43%优良指标,相比集中浮选,回收率提高了17.33%;生产上可以获得铜精矿品位21.29%,回收率91.05%的选矿指标,与生产上该矿石不按特定比例混选相比,铜精矿品位提高了0.81%,回收率提高了0.58%。

关键词：氧化铜矿自然铜重选筛选浮选

Dynamic changes of rumen microbiota and serum metabolome revealed increases in meat quality and growth performances of sheep fed bio‑fermented rice straw

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Journal of Animal Science and Biotechnology 2024年第3期15卷 1207-1226页

作者： Yin Yin Kyawt Min Aung Yao Xu Zhanying Sun Yaqi Zhou Weiyun zhu Varijakshapanicker Padmakumar Zhankun Tan yanfen Cheng Laboratory of Gastrointestinal Microbiology National Center for International Research on Animal Gut NutritionNanjing Agricultural UniversityNanjing 210095China Department of Animal Nutrition University of Veterinary ScienceNay Pyi Taw 15013Myanmar International Livestock Research Institute Nairobi 00100Kenya College of Animal Science Tibet Academy of Agricultural and Animal Husbandry SciencesLhasa 850000China State Key Laboratory of Grassland Agro‑Ecosystems Center for Grassland MicrobiomeCollege of Pastoral Agriculture Science and TechnologyLanzhou UniversityLanzhou 730000China

Background Providing high-quality roughage is crucial for improvement of ruminant production because it is an essential component of their *** previous study showed that feeding bio-fermented rice straw(BF)improved the feed intake and weight gain of ***,it remains unclear why feeding BF to sheep increased their feed intake and weight ***,the purposes of this research were to investigate how the rumen micro-biota and serum metabolome are dynamically changing after feeding BF,as well as how their changes influence the feed intake,digestibility,nutrient transport,meat quality and growth performances of *** growing Hu sheep were allocated into 3 groups:alfalfa hay fed group(AH:positive control),rice straw fed group(RS:negative control)and BF fed group(BF:treatment).Samples of rumen content,blood,rumen epithelium,muscle,feed offered and refusals were collected for the subsequent *** Feeding BF changed the microbial community and rumen fermentation,particularly increasing(P<0.05)relative abundance of Prevotella and propionate production,and decreasing(P<0.05)enteric methane *** histomorphology(height,width,area and thickness)of rumen papillae and gene expression for carbohydrate trans-port(MCT1),tight junction(claudin-1,claudin-4),and cell proliferation(CDK4,Cyclin A2,Cyclin E1)were improved(P<0.05)in sheep fed ***,serum metabolome was also dynamically changed,which led to up-regulating(P<0.05)the primary bile acid biosynthesis and biosynthesis of unsaturated fatty acid in sheep fed *** a result,the higher(P<0.05)feed intake,digestibility,growth rate,feed efficiency,meat quality and mono-unsaturated fatty acid concentration in muscle,and the lower(P<0.05)feed cost per kg of live weight were achieved by feeding *** Feeding BF improved the growth performances and meat quality of sheep and reduced their feed ***,bio-fermentation of rice straw could be an innovative way for improving rum

关键词： Bio-fermentation Growth rate Meat quality Metabolome Microbiota Rice straw

The MYC2-PUB22-JAZ4 module plays a crucial role in jasmonate signaling in tomato

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Molecular Plant 2024年第4期17卷 598-613页

作者： Shaofang Wu Chaoyi Hu Changan zhu yanfen Fan Jie Zhou Xiaojia Xia Kai Shi Yanhong Zhou Christine H.Foyer Jingquan Yu Department of Horticulture Zijingang CampusZhejiang UniversityHangzhou 310058China Hainan Institute Zhejiang UniversityYazhou Bay Science and Technology CitySanya 572025China College of Horticulture Northwest Agriculture&Forestry UniversityXianyang 712100China School of Biosciences College of Life and Environmental SciencesUniversity of BirminghamEdgbaston B152TTUK Key Laboratory of Horticultural Plants Growth and Development Agricultural Ministry of ChinaZhejiang UniversityHangzhou 310058China

Jasmonates(JAs),a class of lipid-derived stress hormones,play a crucial role across an array of plant physiological processes and stress *** JA signaling is thought to rely predominantly on the degradation of specific JAZ proteins by SCF^(COI1),it remains unclear whether other pathways are involved in the regulation of JAZ protein ***,we report that PUB22,a plant U-box type E3 ubiquitin ligase,plays a critical role in the regulation of plant resistance against Helicoverpa armigera and other JA responses in *** COI1 physically interacts with JAZ1/2/5/7,PUB22 physically interacts with JAZ1/3/4/***22 ubiquitinates JAZ4 to promote its degradation via the 26S proteasome ***,we observed that pub22 mutants showreduced resistance to ***,whereas jaz4 single mutants and jaz1 jaz3 jaz4 jaz6 quadruple mutants have enhanced *** hypersensitivity of pub22 mutants to herbivores could be partially rescued by JAZ4 ***,we found that expression of PUB22 can be transcriptionally activated by MYC2,thus forming a positive feedback circuit in JA *** noticed that the PUB22-JAZ4 module also regulates other JA responses,including defense against ***,inhibition of root elongation,and anthocyanin *** together,these results indicate that PUB22 plays a crucial role in plant growth and defense responses,together with COI1-regulated JA signaling,by targeting specific JAZs.

关键词： PUB22 JAZ COI1 MYC2 JA signaling Solanum lycopersicum

The calcium-dependent kinase OsCPK24 functions in cold stress responses in rice

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Journal of Integrative Plant Biology 2018年第2期60卷 173-188页

作者： Yu Liu Chunjue Xu yanfen zhu Lina Zhang Taiyu Chen Fei Zhou Hao Chen Yongjun Lin National Key Laboratory of Crop Genetic Improvement and National Center of Plant Gene Research (Wuhan) Huazhong Agricultural UniversityWuhan 430070 China Shenzhen Institute of Molecular Crop Design Shenzhen 518107 China

Calcium-dependent protein kinases（CPKs）are serine/threonine protein kinases that function in plant stress responses. Although CPKs are recognized as key messengers in signal transduction, the specific roles of CPKs and the molecular mechanisms underlying their activity remain largely unknown. Here, we characterized the function of Os CPK_（24）, a cytosol-localized calciumdependent protein kinase in rice. Os CPK_（24） was universally and highly expressed in rice plants and was induced by cold treatment. Whereas Os CPK_（24） knockdown plants exhibited increased sensitivity to cold compared to wild type（WT）, Os CPK_（24）-overexpressing plants exhibited increased cold tolerance. Plants overexpressing Os CPK_（24） exhibited increased accumulation of proline（an osmoprotectant） and glutathione（an antioxidant） and maintained a higher GSH/GSSG（reduced glutathione to oxidized glutathione） ratio during cold stress compared to WT. In addition to these effects in response to cold stress, we observed the kinase activity of Os CPK_（24） varied under different calcium concentrations. Further,Os CPK_（24） phosphorylated Os Grx_（10）, a glutathionedependent thioltransferase, at rates modulated by changes in calcium concentration. Together, our results support the hypothesis that Os CPK_（24） functions as a positive regulator of cold stress tolerance in rice, a process mediated by calcium signaling and involving phosphorylation and the inhibition of Os Grx_（10） to sustain higher glutathione levels.

关键词： CPK Figure The calcium-dependent kinase OsCPK24 functions in cold stress responses in rice

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“好家风”涵育学生家国情怀

中小学校长 2022年第11期 68-71页

作者：朱燕芬江苏省常州市武进区湖塘桥第二实验小学

培育蕴含家国情怀的“好家风”,是弘扬“家文化”的出发点和落脚点。笔者所在的学校通过开展“有根行动”,建立了“一个核心、三个专题、一套评价”的主题框架,以爱家庭、爱学校、爱祖国的寻根、扎根、厚根系列活动为载体,融汇资源、环... 详细信息

培育蕴含家国情怀的“好家风”,是弘扬“家文化”的出发点和落脚点。笔者所在的学校通过开展“有根行动”,建立了“一个核心、三个专题、一套评价”的主题框架,以爱家庭、爱学校、爱祖国的寻根、扎根、厚根系列活动为载体,融汇资源、环境、课程等于一体,聚焦社会主义核心价值观,既弘扬了优良家风,也有效培育了学生的家国情怀。

关键词：家风家国情怀家校共育

对比冷冻消融与微波消融治疗兔VX2椎旁肿瘤的有效性及安全性

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中国介入影像与治疗学 2024年第4期21卷 237-241页

作者：宋珍珍赵艳芬刘祝李兵川北医学院附属医院放射介入科四川南充637000

目的对比冷冻消融(CA)与微波消融(MWA)治疗兔VX2椎旁肿瘤的有效性及安全性。方法选取48只新西兰大白兔建立VX2椎旁肿瘤模型并随机分为CA组(n=24)及MWA组(n=24),比较组间完全消融率、生存率、布里斯托尔兔疼痛量表(BRPS)评分及并发症发... 详细信息

目的对比冷冻消融(CA)与微波消融(MWA)治疗兔VX2椎旁肿瘤的有效性及安全性。方法选取48只新西兰大白兔建立VX2椎旁肿瘤模型并随机分为CA组(n=24)及MWA组(n=24),比较组间完全消融率、生存率、布里斯托尔兔疼痛量表(BRPS)评分及并发症发生率。结果CA组完全消融率及治疗后21天生存率分别为91.67%(22/24)及33.33%(8/24),均高于MWA组[66.67%(16/24)及16.67%(4/24)](P均<0.05)。CA组治疗后4 h、1天、4天、7天及14天BRPS评分均低于MWA组(P均<0.001);2组上述时间点BRPS评分均低于治疗前(P均<0.05)。CA组并发症发生率(3/24,12.50%)低于MWA组(8/24,33.33%)(P<0.05)。结论CA治疗兔VX2椎旁肿瘤的安全性及有效性均优于MWA。

关键词：消融技术兔动物实验椎旁肿瘤

云南某低品位铜矿中铜及伴生金银高效回收工艺研究

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有色金属（选矿部分） 2023年第1期 93-97页

作者：蒋太国方建军骆忠周仕庆朱艳芬云南铜业股份有限公司矿山研究院昆明650224 昆明理工大学国土资源工程学院昆明650093 玉溪矿业有限公司云南玉溪653100

针对云南某低品位铜矿铜浮选指标不太理想,铜精矿中伴生银品位达不到计价要求的现状,对现场生产工艺和生产条件参数进行优化,并进行了分支串流浮选新工艺的试验研究。结果表明,分支串流浮选新工艺是处理该铜矿最佳的浮选工艺,经过闭路试... 详细信息

针对云南某低品位铜矿铜浮选指标不太理想,铜精矿中伴生银品位达不到计价要求的现状,对现场生产工艺和生产条件参数进行优化,并进行了分支串流浮选新工艺的试验研究。结果表明,分支串流浮选新工艺是处理该铜矿最佳的浮选工艺,经过闭路试验,可以获得铜精矿铜品位21.33%,含金3.04 g/t,含银23.80 g/t,铜回收率达到92.79%,金回收率为64.51%,银回收率为52.55%的优良指标。与现场生产工艺相比,大幅提高了浮选指标,并且使铜精矿中伴生银品位达到了计价要求,实现了该矿石中铜及伴生金银的高效综合回收。

关键词：低品位铜矿分支串流浮选高效回收伴生金银