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生物质制盐阻垢剂OI-PEsa的制备及其性能研究

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化学研究与应用 2024年第5期36卷 1107-1113页

作者：张佳佳骆怡洒韶晖常州大学石油化工学院江苏常州213164

以菊粉(GFn)为原料,经氧化制得氧化菊粉(OI),将其与聚环氧琥珀酸(PEsa)复配得阻垢剂OI-PEsa,通过控制变量法探讨了氧化条件、质量比、体系环境等因素对阻垢性能的影响。实验结果显示:当氧化温度为25℃,质量比m(OI):m(PEsa)为1:4时,制得... 详细信息

以菊粉(GFn)为原料,经氧化制得氧化菊粉(OI),将其与聚环氧琥珀酸(PEsa)复配得阻垢剂OI-PEsa,通过控制变量法探讨了氧化条件、质量比、体系环境等因素对阻垢性能的影响。实验结果显示:当氧化温度为25℃,质量比m(OI):m(PEsa)为1:4时,制得的阻垢剂效果较好,投加量为40mg/L时,在制盐体系中的阻垢率为96.1%,适用于高盐、高碱、高硬度体系中。表征结果显示,阻垢剂可使caCO_(3)垢的晶体形貌尺度变小,从稳定的方解石变成亚稳态的球霰石,说明阻垢剂OI-PEsa具有较好的协同增效作用。

关键词：氧化菊粉复配阻垢剂制盐体系阻垢性能阻垢机理

Artificial intelligence-based predictive model of nanoscale friction using experimental data

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Friction 2021年第6期9卷 1726-1748页

作者： Marko PERČIĆ saša ZELENIKA Igor MEZIĆ University of Rijeka Faculty of Engineering51000 RijekaCroatia University of Rijeka Centre for Micro-and Nanosciences and Technologies&Center for Artificial Intelligence and Cybersecurity51000 RijekaCroatia University of california santa Barbara Department of Mechanical EngineeringSanta BarbaraCA 93105USA

A recent systematic experimental characterisation of technological thin films,based on elaborated design of experiments as well as probe calibration and correction procedures,allowed for the first time the determination of nanoscale friction under the concurrent influence of several process parameters,comprising normal forces,sliding velocities,and temperature,thus providing an indication of the intricate correlations induced by their interactions and mutual *** created the preconditions to undertake in this work an effort to model friction in the nanometric domain with the goal of overcoming the limitations of currently available models in ascertaining the effects of the physicochemical processes and phenomena involved in nanoscale *** to the stochastic nature of nanoscale friction and the relatively sparse available experimental data,meta-modelling tools fail,however,at predicting the factual *** on the acquired experimental data,data mining,incorporating various state-of-the-art machine learning(ML)numerical regression algorithms,is therefore *** results of the numerical analyses are assessed on an unseen test dataset via a comparative statistical *** is therefore shown that the black box ML methods provide effective predictions of the studied correlations with rather good accuracy levels,but the intrinsic nature of such algorithms prevents their usage in most practical *** programming-based artificial intelligence(AI)methods are consequently finally *** the marked complexity of the analysed phenomena and the inherent dispersion of the measurements,the developed AI-based symbolic regression models allow attaining an excellent predictive performance with the respective prediction accuracy,depending on the sample type,between 72%and 91%,allowing also to attain an extremely simple functional description of the multidimensional dependence of nanoscale friction on the studied variable process param

关键词： nanoscale friction thin films data mining machine learning(ML) predictive artificial intelligence(AI)-based model

合并脑损伤高危因素小于胎龄儿的生后早期运动发育特点

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中华围产医学杂志 2024年第2期27卷 126-132页

作者：简茹张慧平卜婧愉袁飒陈艳妮西安交通大学医学部西安710061 西安交通大学附属儿童医院(西安市儿童医院)新生儿重症医学科西安710002 空军军医大学唐都医院儿科西安710038 三二〇一医院儿童保健科汉中723000

目的探讨合并脑损伤高危因素的小于胎龄儿的早期运动发育特点。方法回顾性纳入2022年2~10月在西安市儿童医院新生儿随访门诊随访,合并脑损伤高危因素且在校正年龄(corrected age,ca)2~5周或ca14~17周随访并完成一次婴儿运动能力测试(Tes... 详细信息

目的探讨合并脑损伤高危因素的小于胎龄儿的早期运动发育特点。方法回顾性纳入2022年2~10月在西安市儿童医院新生儿随访门诊随访,合并脑损伤高危因素且在校正年龄(corrected age,ca)2~5周或ca14~17周随访并完成一次婴儿运动能力测试(Test of Infant Motor Performanc,TIMP)的小于胎龄儿(small for gestational age,SGA)和适于胎龄儿(appropriate for gestational age,AGA)共81例。ca2~5周随访到SGA 17例(SGA组),AGA 24例(AGA组);ca14~17周随访到SGA 20例(SGA组),AGA 20例(AGA组)。采用两独立样本t检验、秩和检验及χ^(2)检验比较组间的人口学特征、脑损伤高危因素及TIMP各项评分的差异。结果ca2~5周和ca14~17周,SGA组的出生体重均低于AGA组[(1817.1±440.3)与(2630.0±560.9)g,t=-4.98;(1752.0±434.4)与(2226.3±699.8)g,t=-2.58;P值均0.05)。(1)ca2~5周:SGA组TIMP原始总分[(71.6±13.7)与(80.5±11.5)分,t=-2.26,P=0.029]、引出项评分[61.0分(41.0~85.0分)与69.1分(49.0~96.0分),Z=-2.15,P=0.037]和坐位[8.8分(3.0~19.0分)与11.2分(5.0~22.0分),Z=-2.07,P=0.038]、俯卧位评分[(9.8±3.1)与(12.3±3.1)分,t=-2.19,P=0.034]均低于AGA组。(2)ca14~17周:SGA组患儿的TIMP站立位评分低于AGA组[6.5分(4.0~11.0分)与7.7分(2.0~11.0分),Z=-2.05,P=0.040],但原始总分及坐位、仰卧位、俯卧位、翻身、侧方位各体位评分组间差异均无统计学意义(P值均>0.05)。结论5月龄前,SGA的早期运动能力较AGA低,在ca2~5周主要表现为头控能力相对落后,在ca14~17周时头控能力落后延续至站立位。

关键词：脑损伤婴儿,小于胎龄胎儿生长迟缓神经发育障碍运动技能

Seasonal variability in CDOM absorption and fluorescence properties in the Barataria Basin,Louisiana,Usa

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Journal of Environmental Sciences 2010年第10期22卷 1481-1490页

作者： Shatrughan Singh Eurico D'sa Erick Swenson Department of Oceanography and Coastal Sciences Louisiana State University

Absorption and fluorescence properties of chromophoric dissolved organic matter （CDOM） along a 124 km transect in the Barataria Basin, a large estuary located in Louisiana, Usa, were investigated during high and low flow periods of the Mississippi River in the spring and winter of 2008-2009. Mean CDOM absorption at 355 nm from the marine to the freshwater end member stations ranged from （3.25 ± 0.56） to （20.76 ± 2.43） m^-1 for the three month high flow period whereas it varied from （1.48 ± 1.08） to （25.45 ± 7.03） m^-1 for the same stations during low flow period. Corresponding salinity values at these stations indicated the influence of river and shelf exchanges in the lower basin and precipitation and runoff in the upper basin. An inverse relationship of CDOM absorbance and fluorescence with salinity observed in the basin could he a useful indicator of salinity. CDOM fluorescence also varied over a large range showing an approximately 8 to 12-fold increase between the marine and freshwater end members for the two flow seasons. Excitation-emission matrix spectral plots indicated the presence of various fluorescence components with highest being the A-peak, lowest the T-peak, and the C and M-peaks showing similar trends along the transect. During low flow season the A/C ratio were well correlated with station locations indicating increased terrestrial influence towards the upper basin. CDOM absorption and fluorescence at 355 nm were highly correlated and independent of CDOM sources suggesting that fluorescence could be used to characterize CDOM in the basin.

关键词： Barataria Basin chromophoric dissolved organic matter CDOM fluorescence excitation-emission matrix

非小细胞肺癌患者血清ca211水平和NK细胞数与预后相关

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基础医学与临床 2024年第2期44卷 180-184页

作者：丁飞王洒黄常新杭州师范大学附属医院肿瘤科浙江杭州310015 杭州师范大学临床医学院浙江杭州310018

目的探究非小细胞肺癌(NSCLC)患者血清糖类抗原211(ca211)表达水平和自然杀伤(NK)细胞数与预后的相关性。方法选取杭州师范大学附属医院2019年6月至2022年7月收治的132例NSCLC患者作为实验组,另选取同期收治的132例肺部良性病变患者... 详细信息

目的探究非小细胞肺癌(NSCLC)患者血清糖类抗原211(ca211)表达水平和自然杀伤(NK)细胞数与预后的相关性。方法选取杭州师范大学附属医院2019年6月至2022年7月收治的132例NSCLC患者作为实验组,另选取同期收治的132例肺部良性病变患者作为对照组。从检验科收集数据分析NSCLC患者血清ca211表达水平和NK细胞数与患者预后关系以及影响NSCLC患者预后的相关因素。结果实验组中性粒细胞/淋巴细胞值(NLR值)和血清ca211表达水平高于对照组(Pca211表达水平和NK细胞数呈负相关(r=-0.405,Pca211表达水平和NK细胞数的患者淋巴结转移情况以及TNM分期存在显著性差异(Pca211低表达者1年生存率高于ca211高表达者(Pca211是影响NSCLC患者预后的危险因素(Pca211表达水平及NK细胞数与临床病理特征及预后有密切联系。

关键词：非小细胞肺癌糖类抗原211 自然杀伤细胞预后

Gastrointestinal motility and absorptive disorders in patients with inflammatory bowel diseases: Prevalence, diagnosis and treatment

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World Journal of Gastroenterology 2019年第31期25卷 4414-4426页

作者： Luísa Leite Barros Alberto Queiroz Farias Ali Rezaie Department of Gastroenterology University of Sao Paulo School of MedicineSao Paulo 05403-000Brazil Division of Gastroenterology Department of MedicineCedars Sinai Medical CenterLos AngelesCA 90048United States

Inflammatory bowel diseases(IBD),Crohns disease and ulcerative colitis,are chronic conditions associated with high morbidity and healthcare *** natural history of IBD is variable and marked by alternating periods of flare and *** though the use of newer therapeutic targets has been associated with higher rates of mucosal healing,a great proportion of IBD patients remain symptomatic despite effective control of *** symptoms may include but not limited to abdominal pain,dyspepsia,diarrhea,urgency,fecal incontinence,constipation or *** this setting,commonly there is an overlap with gastrointestinal(GI)motility and absorptive *** recognition of these conditions greatly improves patient care and may decrease the risk of ***,in this review we describe the prevalence,diagnosis and treatment of GI motility and absorptive disorders that commonly affect patients with IBD.

关键词： Inflammatory bowel diseases Crohn’s disease Ulcerative colitis Gastrointestinal motility and absorptive disorders Irritable bowel syndrome Small intestinal bacterial overgrowth Small intestinal fungal overgrowth Dyssynergic defecation Fecal incontinence Chronic intestinal pseudo-obstruction

First attempt to produce experimental campylobacter concisus infection in mice

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World Journal of Gastroenterology 2008年第45期14卷 6954-6959页

作者： Rune Aabenhus Unne Stenram Leif Percival Andersen Henrik Permin sa Ljungh Department of Clinical Microbiology National University Hospital (Rigshospitalet) Department of Pathology University of Lund Department of Infectious Control and Prevention National University Hospital (Rigshospitalet) Department of Internal Medicine Bispebjerg Hospital Department of Medical Microbiology Dermatology and Infection Lund University

AIM： TO infect mice with atypical campylobacter concisus （C. concisus） for the first time. METHODS： Three separate experiments were conducted in order to screen the ability of five clinical C. concisus isolates of intestinal origin and the ATCC 33237 type strain of oral origin to colonize and produce infection in immunocompetent BALB/ca mice. The majority of the BALB/ca mice were treated with cyclophosphamide prior to C. concisus inoculation to suppress immune functions. Inoculation of C. conc/sus was performed by the gastric route. RESULTS： C. concisus was isolated from the liver, ileum and jejunum of cyclophosphamide-treated mice in the first experiment. No C. concisus strains were isolated in the two subsequent experiments. Mice infected with C. concisus showed a significant loss of body weight from day two through to day five of infection but this decreased at the end of the first week. Histopathological examination did not consistently find signs of inflammation in the gut, but occasionally microabscesses were found in the liver of infected animals. CONCLUSION： Transient colonization with C. concisus was observed in mice with loss of body weight. Future studies should concentrate on the first few days after inoculation and in other strains of mice.

关键词： Animal model BALB/ca mice campylobacter concisus Colonization Infection

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40mm厚Q500MEZ35钢板的开发

轧钢 2024年第3期41卷 133-138页

作者：郑海明刘庆波李忠波唐郑磊于飒庞百鸣南阳汉冶特钢有限公司钢研院河南南阳474500 北京科技大学冶金与生态工程学院北京100083

针对Q500MEZ35厚板在线冷却能力不足难以淬透的问题,对其厚度40 mm钢板进行了试制开发。在冶炼过程中,通过控制S元素质量分数不大于0.002%、加入ca线和稀土元素Ce等措施,来减小夹杂物尺寸,以提高钢板Z向抗层状撕裂性能。采用低温大形变... 详细信息

针对Q500MEZ35厚板在线冷却能力不足难以淬透的问题,对其厚度40 mm钢板进行了试制开发。在冶炼过程中,通过控制S元素质量分数不大于0.002%、加入ca线和稀土元素Ce等措施,来减小夹杂物尺寸,以提高钢板Z向抗层状撕裂性能。采用低温大形变的精轧工艺,使其析出更多、更细小的(Ti, Nb, V)(C,N)第二相粒子,为后续铁素体相变提供更多的形核位置。通过不同的终冷温度(580~350℃)试验发现,随着终冷温度的降低,C原子长程扩散能力减弱,残余奥氏体的稳定性降低,从而使M/A岛的尺寸减小。同时,铁素体晶粒以切变的方式在位错处形核,并受C的扩散限制而长大,最终形成细小的板条束针状铁素体。当终冷温度在350℃时,钢板主要组织为细小的粒状贝氏体和针状铁素体,冲击性能最好。

关键词： Q500MEZ35厚板夹杂物低温大形变终冷温度针状铁素体

High-precision geochronology of Mesozoic magmatism in Macao,Southeast China:Evidence for multistage granite emplacement

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Geoscience Frontiers 2020年第1期11卷 243-263页

作者： Pedro Quelhas Agata Alveirinho Dias Joao Mata Donald Wayne Davis Maria Luísa Ribeiro Institute of Science and Environment University of Saint JosephMacaoChina Instituto Dom Luiz Faculdade de CiênciasUniversidade de LisboaLisboaPortugal Jack satterly Geochronology Laboratory Department of Earth SciencesUniversity of TorontoTorontoOntCanada Laboratório Nacional de Engenharia e Geologia LisboaPortugal

Six new high precision U-Pb zircon ID-TIMS ages plus thirteen in situ high spatial resolution U-Pb zircon LA-MC-ICPMS ages are reported from Jurassic plutonic(metaluminous to weakly peraluminous biotite granites)and Jurassic to Cretaceous hypabyssal(dacites)rocks from *** its relatively small area(~30 km^2),the new ages tightly constrain the Macao granitic magmatism to two periods ranging from 164.5±0.6 Ma to 162.9±0.7 Ma and 156.6±0.2 Ma to 155.5±0.8 Ma,separated by ca.6 *** zircons point to the existence of a basement with ages up to Paleo-Proterozoic and late Archean in the *** addition,younger dacitic rocks were dated at 150.6±0.6 Ma andcao granites indicate that the first pulse is also represented in Hong Kong and Southeast(SE)China,while magmatism with the chemical characteristics of the second pulse seems to not be represented outside *** two granitic magmatic pulses have distinct mineralogical and geochemical features that support their discrete nature rather than a continuum of comagmatic activity and suggest that the Macao granitic suite was incrementally assembled during a period of ca.9 Ma,a hypothesis also extendable to the neighboring Hong Kong region for a time lapse of ca.24 *** Macao,the transition from granitic magmatism(Middle to Upper Jurassic)to the younger dacite dykes(Upper Jurassic to Lower Cretaceous)most likely corresponds to a change in the regional tectonic setting,from an extensional regime related with foundering of the subducting paleoPacific plate during the Early Yanshanian period to the reestablishment of a normal subduction system in SE China during the Late Yanshanian period.

关键词： Granites U-Pb geochronology Zircon Jurassic Yanshanian orogeny Macao