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Oxidation and roasting characteristics of artificial magnetite pellets

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Journal of Central South University 2016年第11期23卷 2999-3005页

作者：张汉泉路漫漫付金涛 School of Resources and Civil Engineering Wuhan Institute of Technology

Compared with natural magnetite concentrate, artificial magnetite with more lattice defects and higher activity tends to be oxidized. And the artificial magnetite pellet at the temperature of 400℃ has the oxidation degree approaching to natural magnetite concentrate pellet fired at 1000℃. Besides, two kinds of pellets displayed quite different roasting characteristics. When preheated at the same temperature for the same period of time, natural magnetite concentrate pellet and artificial magnetite concentrate pellet need to be roasted at the temperature of 1100℃ and 1250℃, respectively, for 25 min to reach the compressive strength of 3000 N per pellet. When roasted at the same temperature of 1200℃, natural magnetite pellet and artificial magnetite pellet need to be roasted for 15 min and 30 min, respectively, to reach the compressive strength over 3000 N per pellet. It can be seen from the test that artificial magnetite pellet has a faster oxidation, resulting in the high porosity in the produced pellet, and it requires a roasting process at higher temperature for a longer time to reach the desired compressive strength for industrial production.

关键词： artificial magnetite pellets oxidation degree roasting temperature

Follow-up evaluation with ultrasonography of peripheral nerve injuries after an earthquake

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Neural Regeneration Research 2014年第6期9卷 582-588页

作者： man lu Yue Wang Linxian Yue Jack Chiu Fanding He Xiaojing Wu Bin Zang Bin lu Xiaoke Yao Zirui Jiang Department of Ultrasound Sichuan Provincial People’s Hospital Department of Orthopedics Sichuan Provincial People’s Hospital Department of Radiology University Hospital University of Western Ontario Chengdu Jiaxiang Foreign Languages School

Published data on earthquake-associated peripheral nerve injury is very limited. Ultrasonography has been proven to be efficient in the clinic to diagnose peripheral nerve injury. The aim of this study was to assess the role of ultrasound in the evaluation of persistent peripheral nerve injuries 1 year after the Wenchuan earthquake. Thirty-four patients with persistent clinical symptoms and neurologic signs of impaired nerve function were evaluated with sonography prior to surgi- cal repair. Among 34 patients, ultrasonography showed that 48 peripheral nerves were entrapped, and 11 peripheral nerves were disrupted. There was one case of misdiagnosis on ultrasonogra- phy. The concordance rate of ultrasonographic findings with those of surgical findings was 98%. A total of 48 involved nerves underwent neurolysis and the symptoms resolved. Only five nerves had scar tissue entrapment. Preoperative and postoperative clinical and ultrasonographic results were concordant, which verified that ultrasonography is useful for preoperative diagnosis and postoperative evaluation of injured peripheral nerves.

关键词： nerve regeneration earthquake Wenchuan ultrasound peripheral nerve nerve injury repair follow-up 863 Program neural regeneration

超声引导下微波消融治疗腮腺良性肿瘤的临床价值

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临床超声医学杂志 2024年第5期26卷 365-369页

作者：庄敏岳文胜王诗诗魏婷王璐邹杰何怡卢漫川北医学院医学影像学院四川省南充市637000 四川省肿瘤临床医学研究中心、四川省肿瘤医院·研究所、四川省癌症防治中心、电子科技大学附属肿瘤医院超声医学中心

目的探讨超声引导下微波消融(MWA)治疗腮腺良性肿瘤的临床价值。方法选取行超声引导下MWA治疗的18例腮腺良性肿瘤患者,比较MWA术后1、3、6、12个月肿瘤最大径、体积、体积缩小率及美容评分(CS)情况,并评估其治疗效果及与MWA相关的并发... 详细信息

目的探讨超声引导下微波消融(MWA)治疗腮腺良性肿瘤的临床价值。方法选取行超声引导下MWA治疗的18例腮腺良性肿瘤患者,比较MWA术后1、3、6、12个月肿瘤最大径、体积、体积缩小率及美容评分(CS)情况,并评估其治疗效果及与MWA相关的并发症;同时根据肿瘤的初始最大径分为≤2 cm、2~4 cm及>4 cm 3个亚组,比较各亚组MWA术前、后CS情况。结果所有患者均成功治疗,随访期间均无复发。所有患者均于MWA术后出现面部轻度水肿,1例患者出现短暂性面神经损伤。MWA术后1、3、6、12个月腮腺肿瘤最大径分别为(2.56±1.49)cm、(2.26±1.26)cm、(1.67±1.05)cm、(1.47±1.01)cm;体积分别为2.68(0.87,6.16)cm^(3)、1.86(0.57,4.46)cm^(3)、1.15(0.19,1.91)cm^(3)、0.74(0.09,1.28)cm^(3);体积缩小率分别为37.20%±11.54%、57.48%±9.75%、81.20%±8.54%、90.01%±6.75%;患者CS分别为(2.83±0.79)分、(2.33±0.91)分、(1.89±0.90)分、(1.75±0.93)分;其中,MWA术后6、12个月腮腺肿瘤最大径和体积均较术前明显减小,MWA术后3、6、12个月体积缩小率均较MWA术后1个月明显减小,MWA术后3、6、12个月患者CS均较术前明显减小,差异均有统计学意义(均P<0.05)。亚组分析显示,≤2 cm组MWA术后1、3、6、12个月CS,以及2~4 cm组MWA术后3、6、12个月CS均较术前明显减小,差异均有统计学意义(均P<0.05);各亚组间同一时间CS比较差异均有统计学意义(均P<0.05)。结论超声引导下MWA治疗腮腺良性肿瘤具有良好的临床疗效,且初始最大径较小的肿瘤术后CS减小更快,对患者进行早期干预可以获得更好的美容效果。

关键词：超声引导微波消融腮腺肿瘤良性

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常见水果营养充足率与营养素密度评价研究

中国食物与营养 2024年第7期30卷 55-60,68页

作者：王沛卢曼刘鹏孙君茂孙桂菊黄家章农业农村部食物与营养发展研究所北京100081 东南大学公共卫生学院南京210003

目的:评估常见水果的营养充足率与营养素密度,为消费者在选择水果时提供科学依据。方法:选取12种常见水果,即奇异果(黄心和绿心)、橙子、草莓、芒果、柠檬、柑橘、香蕉、葡萄、西瓜、梨和苹果,分析检测其代表性的16种营养素的含量,包括... 详细信息

目的:评估常见水果的营养充足率与营养素密度,为消费者在选择水果时提供科学依据。方法:选取12种常见水果,即奇异果(黄心和绿心)、橙子、草莓、芒果、柠檬、柑橘、香蕉、葡萄、西瓜、梨和苹果,分析检测其代表性的16种营养素的含量,包括蛋白质、总膳食纤维、维生素A、维生素B_(1)、维生素B_(2)、烟酸、泛酸、维生素B6、叶酸、维生素B_(12)、维生素C、维生素D_(3)、维生素E、钙、铁及镁等,据此计算营养充足率评分(nutrient adequacy score,NAS)及营养素密度评分(nutrient density score,NDS),以衡量水果的营养价值。结果:NAS较高的有奇异果(黄心)、草莓、奇异果(绿心)和柠檬,分别为14.62、12.67、11.80、10.09;草莓、柠檬、奇异果(黄心)和奇异果(绿心)的NDS也较高,分别为39.61、27.28、23.98、20.70。维生素C和膳食纤维在奇异果中含量丰富,而柠檬和橙子是膳食纤维的良好来源。铁的含量高出现在草莓中,钙和镁的含量高出现在柠檬中。结论:奇异果(黄心)、草莓、奇异果(绿心)、柠檬和橙子均属于营养充足率和营养素密度较高的水果。

关键词：水果营养充足率营养素密度营养评价

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土石分层填方地基强夯加固效果研究

地质灾害与环境保护 2024年第3期35卷 101-107页

作者：杨元富眭素刚陈刚冉路蔓梅倩玮昆明理工大学国土资源工程学院昆明650093 中国有色金属工业昆明勘察设计研究院昆明650051

现有的高填方回填工艺多数为土石混合料回填,土石分层回填的研究案例较少。为研究土石分层填方地基的强夯加固效果,采用现场试验结合数值模拟的方法,研究碎石层厚度为1 m、2 m、4 m、4.5 m的填方地基强夯加固效果。结果表明:强夯加固后... 详细信息

现有的高填方回填工艺多数为土石混合料回填,土石分层回填的研究案例较少。为研究土石分层填方地基的强夯加固效果,采用现场试验结合数值模拟的方法,研究碎石层厚度为1 m、2 m、4 m、4.5 m的填方地基强夯加固效果。结果表明:强夯加固后,土石互层地基岩土体的干密度、含水率、孔隙比、压缩模量、地基承载力均得到了大幅度改善,土石互层地基强夯加固效果可以满足工程设计要求;随着碎石层厚度的增加,土石分层回填地基的强夯加固深度降低;在固定夯击能级、夯锤落距、夯击次数等因素的前提下,碎石层厚度为1 m、2 m、4 m、4.5 m时的强夯加固效果均可以满足工程设计要求,但满足要求的夯击数并无明显的变化规律。

关键词：土石分层强夯加固夯沉量碎石层厚度

Correlation study of biological characteristics of non-small cell lung cancer A549 cells after transfecting plasmid by microbubble ultrasound contrast agent

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Asian Pacific Journal of Tropical Medicine 2016年第6期9卷 564-567页

作者： Xuan-Yan Guo man-lu Xue-Qing Chen Fan-Ding He Ang-Li Ultrasonic Department Academy of Sciences of Sichuan Province People's Hospital of Sichuan Province Pancreatic Surgery West China Hospital Sichuan University

Objective: To explore the role of the abnormal expression of miRNAs in the development process of non-small cell lung cancer and the feasibility of ultrasound microbubble-mediated gene therapy after transfecting antisense miRNA-224 and miRNA-122 a plasmids into nonsmall cell lung cancer A549 cells. Methods: Antisense miRNA-224 and miRNA-122 a plasmids were transfected into non-small cell lung cancer A549 cells on the optimal ultrasound microbubble mediated condition. We set up a control group. The cell proliferation activity, apoptosis, invasion ability were detected by MTT assay, Annexin V-PE, Transwell invasion experiment and colony formation assay, respectively. Results: The expression of mi RNA-224 decreased and the expression of miRNA-122 a rose after the plasmids of target genes were transfected into non-small cell lung cancer A549 cells, and there were significant differences when compared with those of the control group(Plusions: A549 cells transfected by ultrasound micro

关键词： Microbubble ultrasound contrast agent MiR-224 MiR-122a Non-small cell lung cancer

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攀枝花马家田尾矿库尾矿力学性质试验研究

地质灾害与环境保护 2024年第3期35卷 108-115页

作者：冉路蔓陈刚眭素刚杨元富梅倩玮昆明理工大学国土资源工程学院昆明650093 中国有色金属工业昆明勘察设计研究院昆明650051

在尾矿库的设计与稳定性研究中,堆存尾矿的力学性质是一种重要的基础参数。本文对微观颗粒进行分析以及对尾细砂与尾粉土两种尾矿进行了压缩试验、剪切试验与三轴试验。试验结果表明:(1)在自重应力作用下,细粒尾矿的孔隙比变化明显强于... 详细信息

在尾矿库的设计与稳定性研究中,堆存尾矿的力学性质是一种重要的基础参数。本文对微观颗粒进行分析以及对尾细砂与尾粉土两种尾矿进行了压缩试验、剪切试验与三轴试验。试验结果表明:(1)在自重应力作用下,细粒尾矿的孔隙比变化明显强于粗粒尾矿,透水性和渗透系数随深度增大逐渐变小,抗压缩能力则相反。(2)尾细砂固结快剪指标较直剪快剪指标低,尾粉土则相反。尾矿的三轴试验与剪切试验c值差异较大。(3)不同围压下的两种尾矿σ_(3)/τ_(d)-N_(f)的拟合程度较高,归一性较好。其动剪模量随着动剪应变幅的增大而减小,阻尼比则随着动剪应变幅的增大而增大。

关键词：尾矿稳定性力学性质压缩试验剪切试验三轴试验

Reading Time and DNA Sequence Preference of TET3 CXXC Domain Revealed by Single-Molecule Profiling

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Chinese Journal of Chemistry 2023年第10期41卷 1177-1184页

作者： Zeyu Wang Zhiqiang Cao Kangkang Ma man lu Meije Wang Han Gao Deshun Gong Lin Liang Zhongbo Yu Frontiers Science Center for Cell Responses State Key Laboratory of Medicinal Chemical Biologyand College of PharmacyNankai University38 Tongyan RoadTianjin 300350China State Key Laboratory of Medicinal Chemical Biology and College of Life Sciences Nankai UniversityTianjin 300350China College of Animal Science Shanxi Agricultural UniversityTaiguShanxi 030801China

Recognition of CpG dinucleotide DNA in epigenetic information flow plays a pivotal role for cellular differentiation and *** TET3 CXXC domain binds to CpG DNA,serving a basic epigenetic information reading *** the selective recognition of a CpG motif by a CXXC domain from crowded binding sites in a gene sequence,the protein-DNA interactions are beyond CpG ***,the selective binding dynamics of CpG within a long DNA context by epigenetic enzymes have been rarely exploit-ed,which is hard for ensemble methods to ***,we used single-molecule magnetic tweezers to quantitatively examine the dynamics of TET3's CXXC domain on a Hoxa9 promoter *** single-molecule binding profile revealed that CXXC-DNA interactions involve both CpG motifs and their flanking *** residence time of TET3 CXXC differs by about 1000 times in five distin-guished CpG clusters in the context of a CpG ***,we performed multi-state hidden Markov modeling analysis on the zip-ping/unzipping dynamics of a CpG hairpin,discovering TET3 CXXC's preference on CpG motifs regarding the-2 to+2 flanking *** results shed light on the selective binding dynamics of a CXXC on a gene sequence,facilitating studies on epigenetic information reading mechanisms.

关键词： Enzymes DNA recognition CpG flanking sequence Single-molecule studies Magnetic tweezers

足三里穴位注射右美托咪定对妇科腹腔镜术后PONV及胃肠激素水平的影响

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中国中医药科技 2024年第4期31卷 580-585页

作者：易玲梅尉明洋周璟张梅李进进芦曼浙江中医药大学附属第一医院浙江杭州310003

目的:探讨足三里穴位注射右美托咪定对妇科腹腔镜术后恶心呕吐(PONV)及胃肠激素水平的影响。方法:纳入2021年7月—2022年11月本院收治的120例妇科腹腔镜手术患者,并按随机数字表法将其分为4组,每组30例。A组患者于足三里注射右美托咪定;... 详细信息

目的:探讨足三里穴位注射右美托咪定对妇科腹腔镜术后恶心呕吐(PONV)及胃肠激素水平的影响。方法:纳入2021年7月—2022年11月本院收治的120例妇科腹腔镜手术患者,并按随机数字表法将其分为4组,每组30例。A组患者于足三里注射右美托咪定;B组患者于足三里注射酚妥拉明+右美托咪定;C组患者于足三里注射生理盐水;D组患者于静脉注射右美托咪定。比较4组患者手术及麻醉指标、PONV发生情况、胃肠激素水平、胃肠功能恢复情况及5-羟色胺受体3(5-HT3)水平变化。结果:4组患者手术时间、麻醉时间、气腹时间、气腹压力、麻醉药物(舒芬太尼)用量比较差异无统计学意义(P>0.05)。术后1 d内各时段,A组PONV发生率均低于D组,A、B组PONV发生率均低于C组,各组在术后0~2 h和2~8 h比较差异具有统计学意义(P<0.05)。相较于术前1 d(T0),术后2 h(T1)、术后8 h(T2)、术后24 h(T3),4组患者胃泌素(GAS)和胃动素(MLT)水平先升高再降低,T1时最高,T3时回落至T0水平,其中T1、T2时GAS、MLT水平明显高于T0(P<0.05),T1、T2时GAS、MLT水平A组低于D组(P<0.05),A组

关键词：妇科腹腔镜手术后穴位注射足三里穴右美托咪定 PONV 胃肠激素 5-羟色胺