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Enriching Iodine and Regulating Grain Aroma,Appearance Quality,and Yield in Aromatic Rice by Foliar Application of Sodium Iodide

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Rice science 2024年第3期31卷 328-342,I0046-I0054页

作者： HONG Weiyuan DUAN Meiyang WANG Yifei CHEN Yongjian MO Zhaowen qi jianying PAN Shenggang TANG Xiangru State Key Laboratory for Conservation and Utilization of Subtropical Agricultural Bioresources South China Agricultural UniversityGuangzhou 510642China Scientific Observing and Experimental Station of Crop Cultivation in South China Ministry of Agriculture and Rural AffairGuangzhou 510642China Guangzhou Key Laboratory for Science and Technology of Aromatic Rice Guangzhou 510642China

Applying iodine fertilizers to cultivate iodine-rich crops for daily intake is an effective approach for iodine supplementation,especially for aromatic rice.Field experiments were conducted during the early growing seasons of 2021 and 2022 to evaluate the impacts of foliar application of iodine fertilizer on aromatic rice and to explore the optimal iodine fertilizer concentration.At the full heading stage,six different concentrations of sodium iodide solutions of 0%(CK),0.010%(T1),0.025%(T2),0.050%(T3),0.075%(T4),and 0.100%(T5)were applied to indica aromatic rice cultivars Meixiangzhan 2 and Xiangyaxiangzhan.The results showed that sodium iodide treatments significantly increased the iodine and sodium contents in both leaves and grains.Compared with the CK,the T1 and T2 treatments increased the 2-acetyl-1-pyrroline(2-AP)content in mature grains by 8.41%-101.66%and 13.58%-74.60%,respectively.Improvements in the contents of 1-pyrroline-5-carboxylic acid,proline,1-pyrroline,and methylglyoxal,as well as the activity of proline dehydrogenase were also detected.Additionally,sodium iodide treatments remarkably decreased the chalky grain rate,chalkiness area,and chalkiness degree of aromatic rice,with the T2 treatment exhibiting a 17.79%-47.42%decrease in chalkiness degree compared with the CK.Meanwhile,T1 and T2 treatments showed beneficial impacts on chlorophyll content,photosynthetic characteristics,and yield components,while T3,T4,and T5 treatments exhibited adverse effects on leaf and grain yields.The linear discriminant analysis revealed significant differences between treatments.The correlation analysis and piecewise structural equation modeling showed that the iodine and sodium influenced the photosynthetic characteristics and chlorophyll content of the leaves,thereby regulating the 2-AP biosynthesis and yield components,ultimately affecting the 2-AP content and yield.Overall,this study suggests that foliar application of 0.025%sodium iodide is an effective method to enrich the iodine content in rice grains,impro

关键词： 2-acetyl-1-pyrroline appearance quality aromatic rice foliar application grain yield iodine

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Environmental exposure and flux of thallium by industrial activities utilizing thallium-bearing pyrite

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Science China Earth Sciences 2013年第9期56卷 1502-1509页

作者： CHEN YongHeng WANG ChunLin LIU Juan WANG Jin qi jianying WU YingJuan Key Laboratory of Waters Safety & Protection in the Pearl River Delta Ministry of EducationGuangzhou University Guangdong Provincial Academy of Environmental Science Department of Geosciences Taiwan University South China Institute of Environmental Science Ministry of Environmental Protection

Thallium(Tl) is a typical toxic heavy metal,with higher toxicity to mammals than Hg,Cd,and Pb.Accurate assessments of its environmental exposure and flux are central to effective management and control of Tl pollution.This paper first presents in detail the environmental exposure and flux of Tl by typical industrial activities utilizing Tl-bearing pyrite minerals to produce sulfuric acid.For this purpose,sequential extraction and Inductively Coupled Plasma Mass Spectrometry(ICP-MS) were used to investigate total content and geo-chemical partitioning of Tl in raw pyrite ores and solid roasting wastes,thereby uncovering Tl distribution and transformation during the production process.Results showed that some portions of Tl bearing in the minerals went into vapor,which transferred Tl into different processes;and some portions of Tl went into water during the gas washing procedure,leaving some other portions remained in the solid slags.More importantly,detailed investigation revealed that 40% of Tl in the pyrite minerals was active,among which 25% of Tl originally in the pyrite minerals was washed into water during gas cleaning process and 15% of active Tl retained in the slags.The latter portion of active Tl could be possibly transferred to the soil or water with the slag deposal or being reused;and 60% of Tl remained relatively stable in the residual phase.

关键词：环境暴露铊污染工业活动通量轴承电感耦合等离子体质谱硫铁矿 ICP-MS

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Speciation analysis of metals (Tl,Cd and Pb) in Tl-containing pyrite and its cinder from Yunfu Mine,China,by ICP-MS with sequential extraction

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Chinese Journal Of Geochemistry 2010年第1期29卷 113-119页

作者： WANG Chunlin CHEN Yongheng PAN Jianyang ZHANG Ping qi jianying LIU Juan LI Xiangping WANG Jin State Key Laboratory of Organic Geochemistry Guangzhou Institute of Geochemistry Chinese Academy of Sciences Guangzhou 510640 China School of Environmental Science and Engineering Guangzhou University Guangzhou 510006 China Graduate University of Chinese Academy of Sciences Beijing 100049 China Hangzhou Environmental Monitoring Center Station Hangzhou 310007 China

The speciation of heavy metals such as thallium,cadmium and lead existing in pyrite and pyrite cinder was analyzed by ICP-MS with a sequential extraction procedure.The distribution patterns of these metals including exchangeable,reducible,oxidizable and residual fractions were obtained.Tl,Cd and Pb in pyrite and pyrite cinder samples from each extraction step were determined by inductively coupled plasma mass spectrometry(ICP-MS).Under the optimized instrumental conditions,detection limits of Tl,Cd and Pb in different matrices were within the range of 0.006-0.07 μg/L,and the relative standard deviations ranged from 0.8% to 1.2%.The accuracy of Tl,Cd and Pb determination was checked by analyzing two certified reference materials.The results demonstrate that trace Tl,Cd and Pb in the samples can be accurately determined.The sequential extraction results revealed that the percent contents of Tl,Cd and Pb in exchangeable,reducible and oxidizable fractions in pyrite cinder are different from those in pyrite and in pyrite cinder.Tl,Cd and Pb mostly are distributed in residual fraction.Therefore,the mobility of metals in pyrite is higher than that in pyrite cinder.Although distributions of Tl,Cd and Pb in the non-residual fraction are not dominant in pyrite cinder,the total concentrations of them could not be ignored.Consequently,attention must be paid to the risk of potential pollution by pyrite cinder.

关键词：电感耦合等离子体质谱连续提取形态分析黄铁矿重金属铊镉铅

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苗期喷施茉莉酸甲酯对香稻品种象牙香占香气的影响

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中国稻米 2024年第3期30卷 67-71,77页

作者：邢丕鹏何珍珍张震罗昊文张莹莹邓思呈莫钊文潘圣刚田华段美洋祁剑英唐湘如华南农业大学亚热带农业生物资源保护与利用国家重点实验室/农业农村部华南地区作物栽培科学观测实验站/广州市丝苗香米科学与技术重点实验室广州510642

茉莉酸甲酯能够提高植物的抗逆境胁迫能力,但在对香稻香气物质2-乙酰基-1-吡咯啉(2-AP)的影响研究还鲜有报道。以香稻品种象牙香占为试验材料,设置茉莉酸甲酯3种喷施浓度(0.25、0.50和1.00 mmol/L),研究苗期喷施对香稻幼苗2-AP合成与累... 详细信息

茉莉酸甲酯能够提高植物的抗逆境胁迫能力,但在对香稻香气物质2-乙酰基-1-吡咯啉(2-AP)的影响研究还鲜有报道。以香稻品种象牙香占为试验材料,设置茉莉酸甲酯3种喷施浓度(0.25、0.50和1.00 mmol/L),研究苗期喷施对香稻幼苗2-AP合成与累积、香气前体物质含量、香气相关酶活性、香气相关基因表达量调控、抗性酶活性变化和秧苗素质的影响。结果表明,与对照(CK)相比,喷施适当的茉莉酸甲酯浓度(0.50~1.00 mmol/L),香稻幼苗2-AP含量增加,香气合成前体物质1-吡咯啉、丙酮醛和1-吡咯啉-5-羧酸(P5C)含量提高,二胺氧化酶2基因(DAO4)、鸟氨酸转氨酶基因(OAT)和脯氨酸脱氢酶基因(ProDH)表达量提升。茉莉酸甲酯处理还提高了香稻秧苗素质,增加了抗性酶活性,提高了抗氧化能力。适度的茉莉酸甲酯能提高香稻2-AP含量和秧苗素质,归因于相关酶活性和基因表达量的提高。

关键词：香稻 2-乙酰基-1-吡咯啉茉莉酸甲酯秧苗素质

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Preliminary Study on the Release of Uranium of Uranium Tailings under Simulated Natural Environment Conditions

Preliminary Study on the Release of Uranium of Uranium Taili...

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Environmental Pollution and Public Health(EPPH 2012)

作者： Zhu Li Wang Jin Liu Juan Chen Yongheng Li Hongchun qi jianying Fu Shanming Li Xiangping School of Environmental Science and Engineering Guangzhou University Department of Geosciences National Taiwan University South China Institute of Environmental Science Ministry of Environmental Protection School of Chemistry and Chemical Engineering Guangzhou University

Radioactive and toxic uranium from the open-air uranium tailings dam could enter into aquatic environment due to long-term intermittent leaching and erosion of rain, especially for acid rain, leading to radioactive pollution which endangered the local groundwater and the ecological environment. In this paper, a semi-dynamic leaching test was carried out for studying migration and release characteristics of uranium over a 49 day period. It simulated natural environment conditions in an open system, with variable slag particle sizes, soak time, pH values, aimed to provide theoretical basis for maximizing prevention of uranium into surface water and groundwater. The gross uranium and the release rate of uranium from samples were calculated. The results showed the pH value of solvent and the particle size are the critical factors which influence the uranium lease from the tailings.

关键词： uranium tailings mobile uranium migration and release radioactive pollution

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不同基因型香稻品种在广州从化的适应性研究

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中国稻米 2024年第2期30卷 105-107,111页

作者：何珍珍张莹莹代兰怡文韬姚祥滨彭立功莫钊文潘圣刚田华段美洋祁剑英唐湘如华南农业大学农学院/亚热带农业生物资源保护与利用国家重点实验室/农业农村部华南地区作物栽培科学观测实验站广州510642

为筛选适宜在广州从化区种植的香稻品种,以6个香稻品种为材料,调查各香稻品种的产量和籽粒香气(2-AP)含量。结果表明,软华优金丝产量最高,为548 kg/hm^(2),但象牙香占、青香优19香、美香占2号的产量与软华优金丝无显著差异。象牙香占籽... 详细信息

为筛选适宜在广州从化区种植的香稻品种,以6个香稻品种为材料,调查各香稻品种的产量和籽粒香气(2-AP)含量。结果表明,软华优金丝产量最高,为548 kg/hm^(2),但象牙香占、青香优19香、美香占2号的产量与软华优金丝无显著差异。象牙香占籽粒2-AP含量最高,与青香优19香差异不显著,但显著高于其他品种。各品种2-AP含量高的原因在于叶片和籽粒中前体物质如脯氨酸、1-吡咯啉和1-吡咯啉-5羧酸含量保持较高水平。象牙香占、青香优19香和软华优金丝在从化种植可以同时保持较高的产量和籽粒2-AP含量,可为从化香米产业的发展提供良好的品种支持。

关键词：香稻 2-AP 产量品种

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Improvement of Ga_(2)O_(3)vertical Schottky barrier diode by constructing NiO/Ga_(2)O_(3)heterojunction

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Journal of Semiconductors 2024年第4期45卷 63-68页

作者： Xueqiang Ji Jinjin Wang Song qi Yijie Liang Shengrun Hu Haochen Zheng Sai Zhang jianying Yue Xiaohui qi Shan Li Zeng Liu Lei Shu Weihua Tang Peigang Li School of Integrated Circuits&State Key Laboratory of Information Photonics and Optical Communications Beijing University of Posts and TelecommunicationsBeijing 100876China College of Integrated Circuit Science and Engineering Nanjing University of Posts and TelecommunicationsNanjing 210023China Beijing Microelectronics Technology Institute Beijing 100076China

The high critical electric field strength of Ga_(2)O_(3)enables higher operating voltages and reduced switching losses in power electronic devices.Suitable Schottky metals and epitaxial films are essential for further enhancing device performance.In this work,the fabrication of vertical Ga_(2)O_(3)barrier diodes with three different barrier metals was carried out on an n--Ga_(2)O_(3)homogeneous epitaxial film deposited on an n+-β-Ga_(2)O_(3)substrate by metal-organic chemical vapor deposition,excluding the use of edge terminals.The ideal factor,barrier height,specific on-resistance,and breakdown voltage characteristics of all devices were investigated at room temperature.In addition,the vertical Ga_(2)O_(3)barrier diodes achieve a higher breakdown volt-age and exhibit a reverse leakage as low as 4.82×10^(-8)A/cm^(2)by constructing a NiO/Ga_(2)O_(3)heterojunction.Therefore,Ga_(2)O_(3)power detailed investigations into Schottky barrier metal and NiO/Ga_(2)O_(3)heterojunction of Ga_(2)O_(3)homogeneous epitaxial films are of great research potential in high-efficiency,high-power,and high-reliability applications.

关键词： Ga_(2)O_(3) Schottky barrier diode NiO/Ga_(2)O_(3)heterojunction

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司美格鲁肽和度拉糖肽治疗2型糖尿病的疗效与安全性比较:基于倾向性评分匹配的回顾性队列研究

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药物流行病学杂志 2024年第6期33卷 601-611页

作者：贺兰芝周鹏翔黄淑琳林春燕罗海坤戚健英张宏亮陈晓宇周甘平广西壮族自治区江滨医院药学部南宁530021 北京大学第三医院药学部北京100191 北京大学医学部药物评价中心北京100191 广西医科大学第一附属医院药学部南宁530021 广西壮族自治区人民医院药学部南宁530021

目的探究司美格鲁肽对比度拉糖肽治疗2型糖尿病的疗效和安全性。方法采用多中心、回顾性队列研究设计,选择2021年4月—2023年7月在3家医院就诊的2型糖尿病患者为研究对象。根据用药情况分为司美格鲁肽组(以下简∶称“SEMA组”)、度拉糖... 详细信息

目的探究司美格鲁肽对比度拉糖肽治疗2型糖尿病的疗效和安全性。方法采用多中心、回顾性队列研究设计,选择2021年4月—2023年7月在3家医院就诊的2型糖尿病患者为研究对象。根据用药情况分为司美格鲁肽组(以下简∶称“SEMA组”)、度拉糖肽组(以下简称“DULA组”),并根据基线性别、年龄、身体质量指数、血糖水平、糖尿病病程及并发症等,采用倾向性评分匹配法对2组患者进行1观察治疗后3、6、9、12个月的空腹血糖、餐后2 h血糖、糖化血红蛋白(HbA1c)、血肌酐、尿素氮、估算肾小球滤过率(eGFR)、尿白蛋白/肌酐比值(UACR)及不良反应的发生情况。结果倾向性评分匹配后,SEMA组和DULA组各纳入98例患者,2组患者的基线特征差异无统计学意义(P>0.05)。2组各随访时点的空腹血糖、餐后2 h血糖、HbA1c均较基线明显降低(P≤0.05)。2组各随访时点空腹血糖、餐后2 h血糖、HbA1c变化(各随访时点与基线差值)差异无统计学意义(P>0.05);第6个月时,SEMA组HbA1c0.05)。结论司美格鲁肽和度拉糖肽均可显著改善血糖控制效果,总体降糖效果相似,安全性相当,而司美格鲁肽有潜在的肾功能保护作用。

关键词： 2型糖尿病司美格鲁肽度拉糖肽临床疗效安全性倾向性评分匹配广义估计方程

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重组rHSA-hFGF21融合蛋白在毕赤酵母中的表达纯化及活性分析

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生物工程学报 2022年第9期38卷 3419-3432页

作者：黄甜甜齐剑英杨刚刚叶贤龙河南师范大学生命科学学院河南新乡453000 赣江中药创新中心江西南昌330000

人成纤维细胞生长因子21(human fibroblast growth factor 21,hFGF21)已成为改善血糖和脂质代谢的候选药物,但却存在半衰期短和易被体内代谢等缺点,导致靶组织利用率低,限制了其临床应用。本研究通过柔性连接肽(GGGGS)_(3)将hFGF21的N... 详细信息

人成纤维细胞生长因子21(human fibroblast growth factor 21,hFGF21)已成为改善血糖和脂质代谢的候选药物,但却存在半衰期短和易被体内代谢等缺点,导致靶组织利用率低,限制了其临床应用。本研究通过柔性连接肽(GGGGS)_(3)将hFGF21的N端连接至人血清白蛋白(human serum albumin,HSA)的C端,经过毕赤酵母密码子优化后,将重组基因片段rHSA-hFGF21连入pPIC9k和pPICZαA两种载体,并转化到X33、GS115和SMD1168三种不同酵母菌株中。通过加压筛选得到高表达的X33-pPIC9K-rHSA-hFGF21工程菌株,并优化摇瓶诱导条件如OD值、甲醇浓度和诱导时间进一步提高rHSA-hFGF21的表达效率。培养上清经中空纤维膜切向流技术粗分离、Blue亲和层析和Q离子交换层析纯化获得纯度约98.18%的rHSA-hFGF21蛋白。与hFGF21相比,rHSA-hFGF21具有更好的热稳定性和抗胰蛋白酶降解的能力,其血浆半衰期也延长了约27.6倍;中高浓度条件下rHSA-hFGF21刺激HepG2细胞摄取葡萄糖的能力优于hFGF21;在2型糖尿病动物中rHSA-hFGF21比hFGF21具有更好的长效降糖效果。本研究将为FGF21蛋白的大规模生产奠定基础。

关键词：成纤维细胞生长因子21(FGF21) 人血白蛋白(HSA) 融合蛋白毕赤酵母糖尿病

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论一般法律会话含义推理及其有效性

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法学论坛 2016年第2期31卷 130-137页

作者：齐建英郑州大学马克思主义学院河南郑州450001

一般会话含义推理是推出说话者的一般会话含义,促进对话者之间达成理解的推理。它的前提和基础是对合作原则的遵循。正是因为合作原则在法律推理中的适用,一般会话含义推理才作为一种法律推理方法存在。相对于关于前提和结论的演绎、归... 详细信息

一般会话含义推理是推出说话者的一般会话含义,促进对话者之间达成理解的推理。它的前提和基础是对合作原则的遵循。正是因为合作原则在法律推理中的适用,一般会话含义推理才作为一种法律推理方法存在。相对于关于前提和结论的演绎、归纳等推导方法,一般法律会话含义推理是将推导融入对话过程的理解方法,是实现个案正义的必要方法。一般法律会话含义推理的有效性以逻辑有效性为基础,以程序有效性为核心,以语言有效性为前提。

关键词：一般会话含义推理法律推理合作原则有效性

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