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The Combination of Achnatherum inebrians Extracts and Soil Microorganisms Inhibited Seed Germination and Seedling Growth in Elymus nutans

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Phyton-International Journal of Experimental Botany 2024年第3期93卷 567-580页

作者： Rui Zhang Taixiang Chen Zhenjiang Chen Hao Chen xuekai wei Malik Kamran Chunjie Li State Key Laboratory of Herbage Improvement and Grassland Agro-Ecosystems Key Laboratory of Animal Husbandry InnovationMinistry of Agriculture and Rural AffairsEngineering Research Center of Grassland AgricultureMinistry of EducationWest Gansu Province Prataculture Technology Innovation CenterCollege of Pastoral Agriculture Science and TechnologyLanzhou UniversityLanzhou730020China Center for Grassland Research National Forestry and Grassland AdministrationCaFBeijing100091China

In a greenhouse experiment,the effects of soil microorganisms and extracts of Achnatherum inebrians on the seed germination and seedling growth of Elymus nutans were *** results showed that both the extracts from aboveground and belowground parts of *** signiﬁcantly inhibited the germination rate,germination potential,germination index,vigor index,seedling height,root length,and fresh weight of ***,but increased malondialdehyde content,catalase,peroxidase and superoxide dismutase activity of *** seedlings(pweight by 10.45%-74.63%,24.18%-32.50%,19.03%-73.36%,37.83%-88.41%,21.42%-53.14%,2.65%-40.21%,and 20.45%-61.36%,respectively,and malondialdehyde content,peroxidase,catalase,and superoxide dismutase activity increased by 8.09%-62.24%,27.83%-86.47%,22.90%-93.17%,and 11.15%-75.91%,*** above indexes were higher in live soil than in sterilized *** microorganisms increased the allelopathy of *** seed germination rate,germination potential,germination index,vigor index,seedling length,and seedling fresh weight of *** planted in live soil decreased by 8.22%-48.48%,10.00%-51.85%,8.19%-53.26%,16.43%-60.03%,12.91%-28.81%,and 9.09%-22.86%compared with sterilized soil,*** content,peroxidase,catalase,and superoxide dismutase activity of *** planted in live soil increased by 53.91%-81.06%,15.71%-57.34%,33.33%-86.31%,and 9.78%-52.51%compared with sterilized soil,*** existence of soil microorganisms enhanced the allelopathy of the secondary metabolites of ***.A combination of microorganisms and aqueous extracts from the aboveground parts of *** had the s

关键词： Achnatherum inebrians water immersion liquid aqueous leachate precipitate allelopathy Elymus nutans soil microorganisms

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Prophylactic treatment of Lacticaseibacillus paracasei K56 ameliorates asthma by regulating short-chain fatty acid production and Treg differentiation

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Food Science and Human Wellness 2024年

作者： Jiaqi Cui Yanfei Hong wei-Hsien Liu Wen Zhao Xinmei Nan xuekai Shang Yalan Li Haotian Feng Qiuyue Jiang weilian Hung Guiying Peng Inner Mongolia Yili Industrial Group Co. Ltd. Department of Immunology and Microbiology School of Life Sciences Beijing University of Chinese Medicine

Many studies have shown that the development of allergic asthma is associated with intestinal microbiota dysbiosis. Based on the gut-lung axis theory， probiotic intervention may be a potential strategy for respiratory diseases. Lacticaseibacillus paracasei K56 was reported to regulate gut microbiota in mice. However， its effect on allergic asthma has not been reported. In this study， we investigated the effect of the K56 on ovalbumin-induced asthma and its possible mechanisms. Our results showed that K56 reduced asthma symptoms and inflammatory cell infiltration in the lung of asthmatic mice. And K56 regulated the differentiation of helper T cells in the lung and intestine. Results from 16S rRNA gene sequencing showed that K56 prophylaxis significantly elevated the richness of Akkermansia and Burkholderia. Meanwhile， K56 abrogated the decrease in the levels of short-chain fatty acids (SCFAs) in the feces. In addition， a rebound in the mRNA expression of the SCFA receptors was observed after K56 prophylaxis. Notably， the regulatory T cell (Treg) frequencies and the FFAR3 levels were positively correlated. These results suggest that K56 could attenuate asthma， possibly by modulating the intestinal microbiota and regulating Treg differentiation through SCFA metabolized. Our study showed that K56 may be used as a probiotic to prevent pulmonary inflammation and dysbiosis of the intestinal microbiota in allergic asthma.

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野大麦–内生真菌共生体作为生态草的潜力浅析

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草业科学 2021年第9期38卷 1715-1725页

作者：翟纡润陈振江魏学凯陈泰祥段廷玉李春杰兰州大学草地农业科技学院甘肃兰州730020

草地作为陆地生态系统的重要组成部分,草地生态环境与国家生态安全息息相关。我国的草地退化问题日益严重,草地面积和产草量正在逐年减少,不仅影响了经济发展,同时还引发了水土流失、荒漠化等多种环境问题。目前迫切需要具有抗逆性强、... 详细信息

草地作为陆地生态系统的重要组成部分,草地生态环境与国家生态安全息息相关。我国的草地退化问题日益严重,草地面积和产草量正在逐年减少,不仅影响了经济发展,同时还引发了水土流失、荒漠化等多种环境问题。目前迫切需要具有抗逆性强、适应性广等特点的优良生态草种,坚持自然恢复为主的方针,来改善草地退化现状,积极应对环境变化。野大麦(Hordeum brevisubulatum)广泛分布在我国盐碱化草甸上,其产量高,品质好,根系发达,抗旱耐寒、耐瘠薄、耐盐碱,内生真菌侵染后野大麦的抗性和适应性得到了进一步的提高。除放牧、刈割、青贮、加工草粉或调制干草外,在低湿地建立栽培草地或改良盐渍化土壤等方面颇有前途。本研究从野大麦优良特性、利用价值以及内生真菌对宿主野大麦生长、抗性和竞争力的影响3个方面进行综述,分析了野大麦–内生真菌作为生态草种的潜力,以期为野大麦–内生真菌共生体的深入研究和合理利用提供参考。

关键词：野大麦内生真菌生态草抗性改善环境栽培草地生态建设

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自制温拌剂对硬质沥青性能影响研究

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山西交通科技 2024年第1期 1-4页

作者：殷传峰王威高学凯马德崇山西省交通科技研发有限公司山西太原030032 湖南城市学院材料与化学工程学院湖南益阳413000

硬质沥青的使用对于提高沥青混合料的劲度模量,改善路面抗车辙能力,提升道路耐久性大有裨益。但硬质沥青内部存在硬质组分含量高,胶结料体系黏度大的特点,使其在应用中存在施工温度高、污染物排放大、不利于道路领域节能减排的缺陷。研... 详细信息

硬质沥青的使用对于提高沥青混合料的劲度模量,改善路面抗车辙能力,提升道路耐久性大有裨益。但硬质沥青内部存在硬质组分含量高,胶结料体系黏度大的特点,使其在应用中存在施工温度高、污染物排放大、不利于道路领域节能减排的缺陷。研究将自制有机降黏型温拌剂以不同掺量加入硬质沥青中制备出温拌硬质沥青,然后对自制温拌剂加入前后硬质沥青的主要技术指标、表观黏度、微观形貌变化及沥青混合料性能进行系统研究。研究成果对于拓展硬质沥青在我国道路工程领域的低碳化应用具有参考意义。

关键词：硬质沥青温拌剂黏度沥青混合料

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参芪扶正注射液治疗非小细胞肺癌化疗后相关疲乏120例

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湖南中医杂志 2024年第5期40卷 11-14,32页

作者：王健康胡帅航李铮王雪凯侯炜中国中医科学院广安门医院北京100053

目的:评价参芪扶正注射液对非小细胞肺癌化疗后相关疲乏患者的疗效及安全性。方法:将240例Ⅲ~IV期非小细胞肺癌气虚证患者随机分为治疗组和对照组,每组各120例。对照组单用化疗,治疗组在对照组基础上联合参芪扶正注射液治疗。采用Piper... 详细信息

目的:评价参芪扶正注射液对非小细胞肺癌化疗后相关疲乏患者的疗效及安全性。方法:将240例Ⅲ~IV期非小细胞肺癌气虚证患者随机分为治疗组和对照组,每组各120例。对照组单用化疗,治疗组在对照组基础上联合参芪扶正注射液治疗。采用Piper疲乏修订量表对2组进行疲乏评估,同时比较2组的中医证候积分、卡氏评分(KPS)和不良反应。结果:治疗组脱落6例,对照组脱落4例。治疗后,治疗组Piper疲乏修订量表积分低于对照组,尤其是在情感、躯体及认知维度方面,差异有统计学意义(P<0.05);治疗组在中医证候积分方面,其神疲乏力、自汗症状较对照组明显减轻(P<0.05);且治疗组在提升KPS积分方面优于对照组(P<0.05)。治疗组中有20例发生不良反应,共出现25次不良事件;对照组中有36例发生不良反应,共出现48次不良事件,2组比较,差异有统计学意义(P<0.05)。结论:参芪扶正注射液有助于减轻非小细胞肺癌化疗后气虚证患者的疲乏症状,改善体力状况,且安全性良好。

关键词：非小细胞肺癌癌因性疲乏气虚证参芪扶正注射液

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不同pH砖红壤浸提液和内生真菌对黑麦草幼苗生长生理的影响

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西北植物学报 2017年第7期37卷 1348-1356页

作者：陈振江刘静魏学凯田沛曹莹周景乐李春杰草地农业生态系统国家重点实验室兰州大学草地农业科技学院兰州730020

以带内生真菌(E+)和不带内生真菌(E-)的多年生黑麦草(Lolium perenne)种子为材料,采用室内种子萌发实验,分析多年生黑麦草在不同pH(4.47~6.12)砖红壤浸提液中种子萌发、幼苗形态指标及生理指标的变化,探讨内生真菌对酸性环境中多年生黑... 详细信息

以带内生真菌(E+)和不带内生真菌(E-)的多年生黑麦草(Lolium perenne)种子为材料,采用室内种子萌发实验,分析多年生黑麦草在不同pH(4.47~6.12)砖红壤浸提液中种子萌发、幼苗形态指标及生理指标的变化,探讨内生真菌对酸性环境中多年生黑麦草幼苗生长和生理特性的影响。结果表明:(1)在相同带菌情况下(内生真菌侵染E+或未浸染E-),随着砖红壤浸提液pH值的降低(浸提液酸性的增强),E+和E-种子发芽率、发芽势、发芽指数、活力指数、胚芽长、胚根长、胚芽鲜重和胚芽干重均表现为逐渐下降的趋势,且5个砖红壤浸提液处理均显著低于相应对照(CK,pH 6.12);幼苗脯氨酸含量、超氧化物歧化酶活性、过氧化物酶活性和丙二醛含量呈上升趋势,且5个砖红壤浸提液处理均显著高于相应CK。(2)除CK外,在相同pH砖红壤浸提液处理下,内生真菌侵染显著提高了多年黑麦草的发芽率、胚芽长、鲜重和干重等形态指标及脯氨酸含量和超氧化物歧化酶活性,却显著降低了过氧化物酶活性和丙二醛含量;在砖红壤浸提液pH为4.47~6.12时,E+萌发种子胚根长与E-之间无显著差异。研究发现,不同pH砖红壤浸提液对E+和E-种子萌发、生长和生理有一定的影响,内生真菌的侵染可促进宿主植物的生长,同时对砖红壤浸提液pH值具有较宽的适应范围,可将多年生黑麦草内生真菌共生体应用于酸性土壤改良。

关键词：多年生黑麦草内生真菌砖红壤浸提液生长生理特性

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温病“养阴清肺活血法”防治放射性肺损伤机制探讨

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辽宁中医药大学学报 2017年第7期19卷 78-81页

作者：董广通祁鑫李铮王雪凯侯炜中国中医科学院广安门医院北京100053

从理论上阐述温病学说中"养阴清肺活血法"与放射性肺损伤的病理关系与防治原则。伤阴化燥贯穿放射性肺损伤发展的始终,如何治疗干预直接影响着疾病的发展、转归和预后,所以"养阴清肺"是治疗放射性肺损伤的基本大法,再根据症状分期的差... 详细信息

从理论上阐述温病学说中"养阴清肺活血法"与放射性肺损伤的病理关系与防治原则。伤阴化燥贯穿放射性肺损伤发展的始终,如何治疗干预直接影响着疾病的发展、转归和预后,所以"养阴清肺"是治疗放射性肺损伤的基本大法,再根据症状分期的差异佐以活血通络。该文在卫、气、营、血辨证的基础上针对放射性肺损伤的分期作浅要的方证分析,提出邪在卫表,辛凉甘润,润燥生津;邪入气分,清气逐郁,泄热保津;邪热入营,清营透热,滋阴生津;邪入血分,凉血活血,增液救阴。

关键词：温病养阴清肺活血法放射性肺损伤卫气营血辨证

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Separation of As and Bi and enrichment of As,Cu,and Zn from copper dust using an oxidation-leaching approach

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Chinese Journal of Chemical Engineering 2021年第5期34卷 125-131页

作者： Erjun Zhang Kanggen Zhou wei Chen xuekai Zhang Changhong Peng School of Metallurgy and Environment Central South UniversityChangsha 410083China College of Chemistry and Chemical Engineering Central South UniversityChangsha 410083China

Copper dust with high arsenic content is a hazardous waste that should be treated ***,the copper dust is oxidized,leached,and separated at room temperature and atmospheric *** separate As and Bi,part of As(Ⅲ)in copper dust is oxidized to As(V),so that most of the As,Cu,and Zn elements enter the solution and the Bi remains in the leaching ***,the influence of several factors,such as H_(2)SO_(4) dosage,H_(2)O_(2) dosage,liquid-solid ratio,leaching temperature and leaching time,on the leaching percentage of As,Bi,Cu,and Zn is systematically *** optimal conditions are obtained as follows:liquid-solid ratio of 3:1,H_(2)O_(2) dosage of 10 ml/50 g(dust),H_(2)SO_(4) dosage of 4.5 ml/50 g(dust),leaching temperature of 85 C,and leaching time of 3 *** these conditions,the leaching percentage of As,Cu,Zn,and Bi is found to be 97.39%,96.11%,97.32%,and 2.40%,*** further recovery of As from the leaching solution,the one-step recycle leaching of the leaching solution is performed to increase the concentration of As in the recycled leaching *** concentration of arsenic in the recycling leaching solution is found to be 79.63 g·L^(-1),which is beneficial for the study on further recovery of As_(2)O_(3).

关键词： Copper dust High arsenic content As Bi Selective leaching Enrichment

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Separation and recovery of iron and scandium from acid leaching solution of red mud using D201 resin

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Journal of Rare Earths 2020年第12期38卷 1322-1329页

作者： xuekai Zhang Kanggen Zhou Yehuizi Wu Qingyuan Lei Changhong Peng wei Chen School of Metallurgy and Environment Central South UniversityChangsha 410083China

Red mud is a byproduct of alumina refining of bauxite ores,and is a significant source for extracting ***,a large amount of iron in red mud makes it difficult to recover scandium because Fe(III) and Sc(Ⅲ) have similar physicochemical *** this study,a new method was developed for selective separation of iron and scandium in acid leachate of red mud using D201 *** calculations indicate that the ferric species mainly exists as FeCl3 or FeCl4-at chloride concentration above 6.65 mol/L,while scandium still exists as SCl2+,making it possible to selectively separate iron fro m scandium through anion resin adso *** factors affecting the adso rption of iron and scandium such as chloride conce ntratio n,resin dosage,adso rption time,and temperature were evaluated in batch experiments,The Langmuir model was successfully applied to both iron and scandium adsorption,and the maximum adsorption capacities of iron and scandium are 147.06 and 0.95 mg/g,respectively,indicating a significant difference between iron and *** analysis further demonstrates that the iron is adsorbed onto D201 resin as FeCl4 anion.

关键词： Red mud Resource recovery Iron Scandium Ion exchange Rare earths

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Separation and recovery of scandium and titanium from red mud leaching liquor through a neutralization precipitation-acid leaching approach

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Journal of Rare Earths 2021年第9期39卷 1126-1132页

作者： Qingyuan Lei Dewen He Kanggen Zhou xuekai Zhang Changhong Peng wei Chen School of Metallurgy and Environment.Central South University Changsha 410083China

Selective recovery of scandium and titanium from red mud leaching solution was achieved through neutralization precipitation followed by acid leaching *** the neutralization precipitation section,the effects of pH,temperature and reaction time on metal precipitation efficiency were *** the optimal co ndition,the precipitation efficiencies of scandium and titanium were 93.74%and 99.47%,*** the acid leaching section,the effects of acidity,temperature,reaction time,and raffinate to acid solution ratio on leaching efficiency were *** the optimal condition,the leaching efficiencies of scandium and titanium were 99.97%and 5.44%,*** loss of scandium and titanium were 6.3%and 5.9%,*** with the traditional extraction procedure of scandium in red mud,this method could separate titanium from scandium effectively,which is beneficial for the purification of the products and improvement of value of the metal.

关键词： Red mud Scandium Titanium Neutralization precipitation Acid leaching Rare earths

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