全球有相当一部分人群因对猫过敏而受到影响,患者症状小到鼻炎,大到哮喘,甚至呼吸障碍,对过敏患者的生活造成严重影响。Fel d 1是目前公认的主要猫过敏原,是一种分泌型球蛋白,主要产生于猫的皮脂腺和唾液腺,在猫梳理毛发的过程中分布到...全球有相当一部分人群因对猫过敏而受到影响,患者症状小到鼻炎,大到哮喘,甚至呼吸障碍,对过敏患者的生活造成严重影响。Fel d 1是目前公认的主要猫过敏原,是一种分泌型球蛋白,主要产生于猫的皮脂腺和唾液腺,在猫梳理毛发的过程中分布到猫毛上,并最终散播到空气中。为解决人类对猫过敏这一难题,相关研究人员尝试从多条途径减少Fel d 1的分泌或控制其传播,以达到缓解或消除猫过敏患者的过敏反应,如通过清洁猫毛、清洁室内环境、培育低过敏性猫、为猫注射疫苗等方法来实现。本文就猫过敏原的研究进展和对猫过敏的管理控制以及治疗措施进行综述。展开更多
为将猫重组变应原Fel d 1蛋白展示在乙肝病毒核心抗原(HBcAg)病毒样颗粒的表面,本试验将编码Fel d 1蛋白的两个基因chain1和chain2拼接在一起形成重组Fel d 1(rFel d 1),然后插入到HBcAg的c/e1loop区,取代HBcAg c/e1loop区的D78与E83之...为将猫重组变应原Fel d 1蛋白展示在乙肝病毒核心抗原(HBcAg)病毒样颗粒的表面,本试验将编码Fel d 1蛋白的两个基因chain1和chain2拼接在一起形成重组Fel d 1(rFel d 1),然后插入到HBcAg的c/e1loop区,取代HBcAg c/e1loop区的D78与E83之间的氨基酸。经密码子优化后进行全基因合成,成功构建了pET28aHBcAg-rFel d 1原核表达载体,将其转化入大肠杆菌BL21(DE3)中,进行原核诱导表达与Ni-NTA亲和层析纯化,并进行SDS-PAGE电泳、Western blotting和透射电镜检测。结果显示,本试验成功表达了HBcAg-r Fel d 1融合蛋白,并利用镍柱纯化得到了较纯的HBcAg-rFel d 1融合蛋白,进一步利用负染法透射电子显微镜检测到HBcAgrFel d 1融合蛋白呈现病毒样颗粒结构。HBcAg-rFel d 1融合蛋白能自发形成病毒样颗粒结构,为猫过敏症的预防与治疗性疫苗的开发奠定基础。展开更多
目的:分析人子宫珠蛋白与猫主要过敏原Fel d 1之间关系。方法 :运用ClustalW 1.83和MEGA5.1 Beta3软件比较人分泌球蛋白家族序列及猫过敏原Fel d 1两个亚基P30438和P30440之间的进化树形图;采用在线软件平台NetMHCII 2.2比较分析P30438...目的:分析人子宫珠蛋白与猫主要过敏原Fel d 1之间关系。方法 :运用ClustalW 1.83和MEGA5.1 Beta3软件比较人分泌球蛋白家族序列及猫过敏原Fel d 1两个亚基P30438和P30440之间的进化树形图;采用在线软件平台NetMHCII 2.2比较分析P30438与子宫珠蛋白典型序列P11684之间抗原性差异;利用Swiss-Model程序模拟并比较P11684、P30438和P30440的三级结构。结果 :分泌球蛋白家族充斥着大量冗余数据,经逐步聚类收缩至13个代表性序列进一步分析发现,整个分泌球蛋白家族划分成两个大家族三个亚家族,而子宫珠蛋白典型序列与猫主要过敏原Fel d 1的一个亚基P30438之亲缘关系最近,两者均具有与HLA高亲和力结合位点,而且三级结构相似。结论:子宫珠蛋白具有潜在的过敏原性。展开更多
目的预测猫主要过敏原Fel d 1的二级结构和B细胞抗原表位。方法以Fel d 1肽链Ⅰ和肽链Ⅱ的氨基酸序列为基础,通过DNASIar Protean软件,采用Chou—Fasman方法预测蛋白质的二级结构;用Kyte—Doolillle法预测亲水性;用Karplus—Sehulz...目的预测猫主要过敏原Fel d 1的二级结构和B细胞抗原表位。方法以Fel d 1肽链Ⅰ和肽链Ⅱ的氨基酸序列为基础,通过DNASIar Protean软件,采用Chou—Fasman方法预测蛋白质的二级结构;用Kyte—Doolillle法预测亲水性;用Karplus—Sehulz方法预测柔韧性;用Emini方法预测表面可及性;用Jaineson—Wolf方法预测抗原性指数。结果对Fel d 1的二级结构和B细胞抗原表位预测的结果表明,第15~21、48~57、103~111、138~143、151~161区段是潜在的B细胞抗原表位。结论本研究有助于确定Fel d 1的B细胞优势抗原表位,为Fel d展开更多
A methodology for performance optimization of torque converters is put forward based on the one-dimensional (1D) flow model. It is found that the inaccuracy of 1D flow model for predicting hydraulic performance at the...A methodology for performance optimization of torque converters is put forward based on the one-dimensional (1D) flow model. It is found that the inaccuracy of 1D flow model for predicting hydraulic performance at the low speed ratio is mainly caused by the separation phenomenon at the stator cascade which is induced by large flow impinging at the pressure side of the stator blades. A semi-empirical separation model is presented and incorporated to the original 1D flow model. It is illustrated that the improved model is able to predict the circumferential velocity components accurately, which can be applied to performance optimization. Then, the Pareto front is obtained by using the genetic algorithm (GA) in order to inspect the coupled relationship among stalling impeller torque capacity, stalling torque ratio and efficiency. The efficiency is maximized on the premise that a target stalling impeller torque capacity and torque ratio are achieved. Finally, the optimized result is verified by the computational fluid dynamics(CFD) simulation, which indicates that the maximal efficiency is increased by 0.96%.展开更多
A new 1-D coordination polymer [Cd(Hsal)2(bpp)2] 1 was hydrothermally synthesi- zed by self-assembly of the corresponding metal oxide and salicylic acid (H2sal) with exo-bidentate flexible dipyridyl ligand 1,3-...A new 1-D coordination polymer [Cd(Hsal)2(bpp)2] 1 was hydrothermally synthesi- zed by self-assembly of the corresponding metal oxide and salicylic acid (H2sal) with exo-bidentate flexible dipyridyl ligand 1,3-bis(4-pyridyl)propane (bpp). X-ray crystal structure analysis reveals that complex 1 crystallizes in monoclinic,space group C2/c with a = 18.942(3),b = 12.9309(19),c = 16.504(2) A,β = 120.072(2)°,V = 3498.3(9)A^3,Z = 4,C40H38CdN4O6,Mr = 783.14,Dc = 1.487 g/cm^3,μ = 0.679 mm^-1,F(000) = 1608,R = 0.0619 and wR = 0.1435 for 3153 observed reflections (I 〉 2σ(I)). The most remarkable feature of 1 lies in the 1-D chain by repeating [Cd2(bpp)2] units which consist of a 24-membered macrocyclic ring. The 1-D motifs are further connected by C–H… O hydrogen bonds to generate a 2-D structure. In addition,thermal stability and luminescent property of compound 1 were also documented.展开更多
A new coordination compound [Ba(OBPT)2(H2O)2]·H2O was obtained at room temperature by the reaction of 4,6-bis(2-pyridyl)-1,3,5-triazin-2-ol(HOBPT) with BaCl2.It was characterized by elemental analysis,FTI...A new coordination compound [Ba(OBPT)2(H2O)2]·H2O was obtained at room temperature by the reaction of 4,6-bis(2-pyridyl)-1,3,5-triazin-2-ol(HOBPT) with BaCl2.It was characterized by elemental analysis,FTIR,TG analysis,powder X-ray diffraction analysis and single-crystal X-ray diffraction analysis.The complex crystallizes in the monoclinic P21/n space group,with a = 16.325(1),b = 6.7977(5),c = 24.164(2) ,β = 104.009(1),V = 2601.8(3) 3,Z =4,C26H22BaN10O5,Mr = 691.88,Dc = 1.766 g/cm3,F(000) = 1376 and μ(MoKα) = 1.587 mm-1.The final R = 0.0282 and wR = 0.0724 for 5095 observed reflections with I 〉 2σ(I) and R = 0.0312 and wR = 0.0744 for all data.In the complex,the barium ion is ten-coordinated with six nitrogen atoms from two ligands,two deprotonated hydroxyl oxygen atoms from another two ligands and two coordinated water molecules to form a double stranded chain.The extensive supramolecular interac-tions lead to the formation of an infinite 2D framework.展开更多
In this study, 1D and 2D shallow-water models were coupled to simulate unsteady flow in channel networks and embayment. The 1D model solved the 1D shallow-water equations (St. Venant) using the Preissmann box method a...In this study, 1D and 2D shallow-water models were coupled to simulate unsteady flow in channel networks and embayment. The 1D model solved the 1D shallow-water equations (St. Venant) using the Preissmann box method and targeted long narrow reaches of the river networks, while the 2D model targeted broad channels and embayment and solved the 2D shallow-water equations using a semi-implicit scheme applied to an unstructured grid of triangular cells. The 1D and 2D models were solved simultaneously by building a matrix for the free surface elevation at every 1D junction and 2D cell center. Velocities were then computed explicitly based on the results at the previous time step and the updated water level. The originality of the scheme arose from a novel coupling method. The results showed that the coupled 1D/2D model produced identical results as the full 2D model in classical to benchmark problems with considerable savings in computational effort. Application of the model to the Pearl River Estuary in southern China showed that complex patterns of tidal wave propagation could be efficiently modeled.展开更多
In recent years, the Cavally River has been subject to multiple activities, <span style="font-family:;" "="">including the construction of diversion channels and a bridge that makes it v...In recent years, the Cavally River has been subject to multiple activities, <span style="font-family:;" "="">including the construction of diversion channels and a bridge that makes it vulnerable to flooding. In order to assess the impact of these hydraulic structures on the <span>river hydrodynamic functioning, a 1D-2D model was realized. The</span> implementation of the 1D-2D model consisted </span><span style="font-family:;" "="">of </span><span style="font-family:;" "="">first </span><span style="font-family:;" "="">running</span><span style="font-family:;" "=""> </span><span style="font-family:;" "="">the 1D model, then the 2D model, and finally in coupling them. The 1D-2D model was designed with <span>the 1988 flood hydrograph, a Manning’s coefficient of 0.052 m<sup>1/3</sup>/s for the </span>minor bed and 0.06 m<sup>1/3</sup>/s for the major bed. The results of the hydraulic model show that the velocities are almost identical to those of the Cavally in natural operation. The values of the velocities are included between 0.4 m/s and 1.3 m/s at the level of the minor bed of the river and between 0.06 m/s and 0.71 m/s at the level of the floodplains. The average water level for flood propagation is 262.37 ± 0.44 m before construction of the structures and 262.23 ± <span>0.85 m after construction of the structures. The 0.41 m reduction in water</span> level due to the diversion canal and bridge is negligible compared to the total fluctuations of the Cavally River, which vary from 6 to 7 m over the year.</span>展开更多
目的探讨(1-3)-β-D葡聚糖联合降钙素原(procalcitonin,PCT)、CD4^(+)T淋巴细胞多指标在艾滋病患者马尔尼菲篮状菌感染早期诊断临床研究。方法回顾性选取我院2020年1月—2022年6月住院的120例艾滋病患者为研究对象。依据实验室结果,将...目的探讨(1-3)-β-D葡聚糖联合降钙素原(procalcitonin,PCT)、CD4^(+)T淋巴细胞多指标在艾滋病患者马尔尼菲篮状菌感染早期诊断临床研究。方法回顾性选取我院2020年1月—2022年6月住院的120例艾滋病患者为研究对象。依据实验室结果,将其分为马尔尼菲篮状菌感染确诊组(血或组织液培育养出马尔尼菲篮状菌),简称A组(62例),及马尔尼菲篮状菌感染临床诊断组[根据临床症状、体征、血常规及(1-3)-β-D葡聚糖、PCT、CD4^(+)T淋巴细胞多指标诊断],简称B组(58例)。检测患者(1-3)-β-D葡聚糖、PCT、CD4^(+)T淋巴细胞的表达水平,采用受试者工作特征(receiver-operating characteristic,ROC)曲线下面积(area under the curve,AUC)评估上述指标联合检测对艾滋病患者感染马尔尼菲篮状菌的诊断效能。结果A组的(1-3)-β-D葡聚糖和PCT水平均高于B组,CD4^(+)T淋巴细胞个数低于B组(P<0.05);(1-3)-β-D葡聚糖、PCT、CD4^(+)T淋巴细胞联合检测的AUC为0.933,(1-3)-β-D葡聚糖单独检测的AUC是0.812,PCT单独检测的AUC为0.883,CD4^(+)T淋巴细胞单独检测的AUC是0.810,(1-3)-β-D葡聚糖、PCT和CD4^(+)T淋巴细胞联合检测的AUC皆优于三项单独检测,表明(1-3)-β-D葡聚糖、PCT和CD4^(+)T淋巴细胞联合检测的诊断价值皆优于单一指标诊断,且联合检测的特异度、约登指数分别为92.43%和0.580,均高于三项单独检测。结论(1-3)-β-D葡聚糖联合PCT和CD4^(+)T淋巴细胞多指标对艾滋病马尔尼菲篮状菌感染具有非常高的临床诊断价值,能够帮助医生分析出高危风险患者,及时制定治疗方案,同时也承担预后效果的判断依据,对治疗艾滋病马尔尼菲篮状菌感染具有非常重要的研究价值。展开更多
目的探讨骨外膜素(Periostin)、Notch跨膜受体-1(Notch1)m RNA、维生素D(VitD)与自身免疫性甲状腺炎(AIT)淋巴细胞浸润程度、调节性T细胞/辅助性T细胞17(Treg/Th17)的相关性。方法选取2021年7月至2023年12月郑州大学第一附属医院收治的9...目的探讨骨外膜素(Periostin)、Notch跨膜受体-1(Notch1)m RNA、维生素D(VitD)与自身免疫性甲状腺炎(AIT)淋巴细胞浸润程度、调节性T细胞/辅助性T细胞17(Treg/Th17)的相关性。方法选取2021年7月至2023年12月郑州大学第一附属医院收治的92例AIT患者纳入AIT组,另选取同期50例无甲状腺疾病的健康人群纳入对照组。比较两组受检者的淋巴细胞浸润程度及抗体水平,采用Spearman、Pearson相关系数分析淋巴细胞浸润程度、Treg/Th17与甲状腺功能、抗体水平的相关性,比较两组受检者的Periostin、Notch1 m RNA、VitD及Treg/Th17,采用Pearson相关系数分析Periostin、Notch1 mRNA、VitD与淋巴细胞浸润程度及Treg/Th17的相关性。结果AIT组患者的CD3^(+)、CD3^(+)CD4^(+)、CD4^(+)CD25^(+)CD127^(-)、TgAb、TPOAb、TRAb水平及甲亢/亚临床甲亢、甲减/亚临床甲减患者占比明显高于对照组,差异均有统计学意义(P<0.05);Pearson相关系数分析结果显示,CD3^(+)(r=0.579、0.602、0.563)、CD3^(+)CD4^(+)(r=0.612、0.637、0.606)、CD~4+CD25^(+)CD127^(-)(r=0.655、0.643、0.687)与TgAb、TPOAb、TRAb呈正相关(P<0.05);AIT组患者的Periostin、Notch1 m RNA分别为(4.27±1.40)μg/L、1.73±0.56,明显高于对照组的(2.86±0.49)μg/L、1.02±0.14,VitD、Treg/Th17分别为(17.82±5.09)ng/mL、2.82±0.97,明显低于对照组的(22.30±3.76)ng/mL、12.36±2.03,差异均有统计学意义(P<0.05);Pearson相关系数分析结果显示,Periostin(r=0.792、0.811、0.737)、Notch1 mRNA(r=0.812、0.775、0.792)与CD3^(+)、CD3^(+)CD4^(+)、CD4^(+)CD25+CD127-呈正相关(P<0.05),VitD(r=-0.687、-0.753、-0.799)与之呈负相关(P<0.05),且Periostin(r=-0.823)、Notch1 m RNA(r=-0.772)与Treg/Th17呈负相关(P<0.05),VitD(r=0.745)与之呈正相关(P<0.05)。结论Periostin、Notch1 mRNA在AIT患者血清中表达上调,VitD表达下调,各指标与AIT淋巴细胞浸润程度及Treg/Th17均具有一定相关性,可为临床判断病情提供参考,并对后续临床治疗具有一定指导价值。展开更多
文摘全球有相当一部分人群因对猫过敏而受到影响,患者症状小到鼻炎,大到哮喘,甚至呼吸障碍,对过敏患者的生活造成严重影响。Fel d 1是目前公认的主要猫过敏原,是一种分泌型球蛋白,主要产生于猫的皮脂腺和唾液腺,在猫梳理毛发的过程中分布到猫毛上,并最终散播到空气中。为解决人类对猫过敏这一难题,相关研究人员尝试从多条途径减少Fel d 1的分泌或控制其传播,以达到缓解或消除猫过敏患者的过敏反应,如通过清洁猫毛、清洁室内环境、培育低过敏性猫、为猫注射疫苗等方法来实现。本文就猫过敏原的研究进展和对猫过敏的管理控制以及治疗措施进行综述。
文摘为将猫重组变应原Fel d 1蛋白展示在乙肝病毒核心抗原(HBcAg)病毒样颗粒的表面,本试验将编码Fel d 1蛋白的两个基因chain1和chain2拼接在一起形成重组Fel d 1(rFel d 1),然后插入到HBcAg的c/e1loop区,取代HBcAg c/e1loop区的D78与E83之间的氨基酸。经密码子优化后进行全基因合成,成功构建了pET28aHBcAg-rFel d 1原核表达载体,将其转化入大肠杆菌BL21(DE3)中,进行原核诱导表达与Ni-NTA亲和层析纯化,并进行SDS-PAGE电泳、Western blotting和透射电镜检测。结果显示,本试验成功表达了HBcAg-r Fel d 1融合蛋白,并利用镍柱纯化得到了较纯的HBcAg-rFel d 1融合蛋白,进一步利用负染法透射电子显微镜检测到HBcAgrFel d 1融合蛋白呈现病毒样颗粒结构。HBcAg-rFel d 1融合蛋白能自发形成病毒样颗粒结构,为猫过敏症的预防与治疗性疫苗的开发奠定基础。
文摘目的:分析人子宫珠蛋白与猫主要过敏原Fel d 1之间关系。方法 :运用ClustalW 1.83和MEGA5.1 Beta3软件比较人分泌球蛋白家族序列及猫过敏原Fel d 1两个亚基P30438和P30440之间的进化树形图;采用在线软件平台NetMHCII 2.2比较分析P30438与子宫珠蛋白典型序列P11684之间抗原性差异;利用Swiss-Model程序模拟并比较P11684、P30438和P30440的三级结构。结果 :分泌球蛋白家族充斥着大量冗余数据,经逐步聚类收缩至13个代表性序列进一步分析发现,整个分泌球蛋白家族划分成两个大家族三个亚家族,而子宫珠蛋白典型序列与猫主要过敏原Fel d 1的一个亚基P30438之亲缘关系最近,两者均具有与HLA高亲和力结合位点,而且三级结构相似。结论:子宫珠蛋白具有潜在的过敏原性。
文摘目的预测猫主要过敏原Fel d 1的二级结构和B细胞抗原表位。方法以Fel d 1肽链Ⅰ和肽链Ⅱ的氨基酸序列为基础,通过DNASIar Protean软件,采用Chou—Fasman方法预测蛋白质的二级结构;用Kyte—Doolillle法预测亲水性;用Karplus—Sehulz方法预测柔韧性;用Emini方法预测表面可及性;用Jaineson—Wolf方法预测抗原性指数。结果对Fel d 1的二级结构和B细胞抗原表位预测的结果表明,第15~21、48~57、103~111、138~143、151~161区段是潜在的B细胞抗原表位。结论本研究有助于确定Fel d 1的B细胞优势抗原表位,为Fel d
基金National Natural Science Foundation of China(No. 51175379)
文摘A methodology for performance optimization of torque converters is put forward based on the one-dimensional (1D) flow model. It is found that the inaccuracy of 1D flow model for predicting hydraulic performance at the low speed ratio is mainly caused by the separation phenomenon at the stator cascade which is induced by large flow impinging at the pressure side of the stator blades. A semi-empirical separation model is presented and incorporated to the original 1D flow model. It is illustrated that the improved model is able to predict the circumferential velocity components accurately, which can be applied to performance optimization. Then, the Pareto front is obtained by using the genetic algorithm (GA) in order to inspect the coupled relationship among stalling impeller torque capacity, stalling torque ratio and efficiency. The efficiency is maximized on the premise that a target stalling impeller torque capacity and torque ratio are achieved. Finally, the optimized result is verified by the computational fluid dynamics(CFD) simulation, which indicates that the maximal efficiency is increased by 0.96%.
基金Supported by the National Natural Science Foundation of China (No. 20771006)Education Committee of Anhui Province (KJ2008B005)
文摘A new 1-D coordination polymer [Cd(Hsal)2(bpp)2] 1 was hydrothermally synthesi- zed by self-assembly of the corresponding metal oxide and salicylic acid (H2sal) with exo-bidentate flexible dipyridyl ligand 1,3-bis(4-pyridyl)propane (bpp). X-ray crystal structure analysis reveals that complex 1 crystallizes in monoclinic,space group C2/c with a = 18.942(3),b = 12.9309(19),c = 16.504(2) A,β = 120.072(2)°,V = 3498.3(9)A^3,Z = 4,C40H38CdN4O6,Mr = 783.14,Dc = 1.487 g/cm^3,μ = 0.679 mm^-1,F(000) = 1608,R = 0.0619 and wR = 0.1435 for 3153 observed reflections (I 〉 2σ(I)). The most remarkable feature of 1 lies in the 1-D chain by repeating [Cd2(bpp)2] units which consist of a 24-membered macrocyclic ring. The 1-D motifs are further connected by C–H… O hydrogen bonds to generate a 2-D structure. In addition,thermal stability and luminescent property of compound 1 were also documented.
基金Supported by the National Natural Science Foundation of China (21001031)Special funds of discipline construction and teaching quality and teaching reform project of higher education institutions of the education department of Guangdong province
文摘A new coordination compound [Ba(OBPT)2(H2O)2]·H2O was obtained at room temperature by the reaction of 4,6-bis(2-pyridyl)-1,3,5-triazin-2-ol(HOBPT) with BaCl2.It was characterized by elemental analysis,FTIR,TG analysis,powder X-ray diffraction analysis and single-crystal X-ray diffraction analysis.The complex crystallizes in the monoclinic P21/n space group,with a = 16.325(1),b = 6.7977(5),c = 24.164(2) ,β = 104.009(1),V = 2601.8(3) 3,Z =4,C26H22BaN10O5,Mr = 691.88,Dc = 1.766 g/cm3,F(000) = 1376 and μ(MoKα) = 1.587 mm-1.The final R = 0.0282 and wR = 0.0724 for 5095 observed reflections with I 〉 2σ(I) and R = 0.0312 and wR = 0.0744 for all data.In the complex,the barium ion is ten-coordinated with six nitrogen atoms from two ligands,two deprotonated hydroxyl oxygen atoms from another two ligands and two coordinated water molecules to form a double stranded chain.The extensive supramolecular interac-tions lead to the formation of an infinite 2D framework.
基金financially supporrted by the National Key Research and Development Program of China(Grant No.2017YFC1404200)the National Natural Science Foundation of China(Grant Nos.51779150 and 51979040)
文摘In this study, 1D and 2D shallow-water models were coupled to simulate unsteady flow in channel networks and embayment. The 1D model solved the 1D shallow-water equations (St. Venant) using the Preissmann box method and targeted long narrow reaches of the river networks, while the 2D model targeted broad channels and embayment and solved the 2D shallow-water equations using a semi-implicit scheme applied to an unstructured grid of triangular cells. The 1D and 2D models were solved simultaneously by building a matrix for the free surface elevation at every 1D junction and 2D cell center. Velocities were then computed explicitly based on the results at the previous time step and the updated water level. The originality of the scheme arose from a novel coupling method. The results showed that the coupled 1D/2D model produced identical results as the full 2D model in classical to benchmark problems with considerable savings in computational effort. Application of the model to the Pearl River Estuary in southern China showed that complex patterns of tidal wave propagation could be efficiently modeled.
文摘In recent years, the Cavally River has been subject to multiple activities, <span style="font-family:;" "="">including the construction of diversion channels and a bridge that makes it vulnerable to flooding. In order to assess the impact of these hydraulic structures on the <span>river hydrodynamic functioning, a 1D-2D model was realized. The</span> implementation of the 1D-2D model consisted </span><span style="font-family:;" "="">of </span><span style="font-family:;" "="">first </span><span style="font-family:;" "="">running</span><span style="font-family:;" "=""> </span><span style="font-family:;" "="">the 1D model, then the 2D model, and finally in coupling them. The 1D-2D model was designed with <span>the 1988 flood hydrograph, a Manning’s coefficient of 0.052 m<sup>1/3</sup>/s for the </span>minor bed and 0.06 m<sup>1/3</sup>/s for the major bed. The results of the hydraulic model show that the velocities are almost identical to those of the Cavally in natural operation. The values of the velocities are included between 0.4 m/s and 1.3 m/s at the level of the minor bed of the river and between 0.06 m/s and 0.71 m/s at the level of the floodplains. The average water level for flood propagation is 262.37 ± 0.44 m before construction of the structures and 262.23 ± <span>0.85 m after construction of the structures. The 0.41 m reduction in water</span> level due to the diversion canal and bridge is negligible compared to the total fluctuations of the Cavally River, which vary from 6 to 7 m over the year.</span>
文摘目的探讨(1-3)-β-D葡聚糖联合降钙素原(procalcitonin,PCT)、CD4^(+)T淋巴细胞多指标在艾滋病患者马尔尼菲篮状菌感染早期诊断临床研究。方法回顾性选取我院2020年1月—2022年6月住院的120例艾滋病患者为研究对象。依据实验室结果,将其分为马尔尼菲篮状菌感染确诊组(血或组织液培育养出马尔尼菲篮状菌),简称A组(62例),及马尔尼菲篮状菌感染临床诊断组[根据临床症状、体征、血常规及(1-3)-β-D葡聚糖、PCT、CD4^(+)T淋巴细胞多指标诊断],简称B组(58例)。检测患者(1-3)-β-D葡聚糖、PCT、CD4^(+)T淋巴细胞的表达水平,采用受试者工作特征(receiver-operating characteristic,ROC)曲线下面积(area under the curve,AUC)评估上述指标联合检测对艾滋病患者感染马尔尼菲篮状菌的诊断效能。结果A组的(1-3)-β-D葡聚糖和PCT水平均高于B组,CD4^(+)T淋巴细胞个数低于B组(P<0.05);(1-3)-β-D葡聚糖、PCT、CD4^(+)T淋巴细胞联合检测的AUC为0.933,(1-3)-β-D葡聚糖单独检测的AUC是0.812,PCT单独检测的AUC为0.883,CD4^(+)T淋巴细胞单独检测的AUC是0.810,(1-3)-β-D葡聚糖、PCT和CD4^(+)T淋巴细胞联合检测的AUC皆优于三项单独检测,表明(1-3)-β-D葡聚糖、PCT和CD4^(+)T淋巴细胞联合检测的诊断价值皆优于单一指标诊断,且联合检测的特异度、约登指数分别为92.43%和0.580,均高于三项单独检测。结论(1-3)-β-D葡聚糖联合PCT和CD4^(+)T淋巴细胞多指标对艾滋病马尔尼菲篮状菌感染具有非常高的临床诊断价值,能够帮助医生分析出高危风险患者,及时制定治疗方案,同时也承担预后效果的判断依据,对治疗艾滋病马尔尼菲篮状菌感染具有非常重要的研究价值。
文摘目的探讨骨外膜素(Periostin)、Notch跨膜受体-1(Notch1)m RNA、维生素D(VitD)与自身免疫性甲状腺炎(AIT)淋巴细胞浸润程度、调节性T细胞/辅助性T细胞17(Treg/Th17)的相关性。方法选取2021年7月至2023年12月郑州大学第一附属医院收治的92例AIT患者纳入AIT组,另选取同期50例无甲状腺疾病的健康人群纳入对照组。比较两组受检者的淋巴细胞浸润程度及抗体水平,采用Spearman、Pearson相关系数分析淋巴细胞浸润程度、Treg/Th17与甲状腺功能、抗体水平的相关性,比较两组受检者的Periostin、Notch1 m RNA、VitD及Treg/Th17,采用Pearson相关系数分析Periostin、Notch1 mRNA、VitD与淋巴细胞浸润程度及Treg/Th17的相关性。结果AIT组患者的CD3^(+)、CD3^(+)CD4^(+)、CD4^(+)CD25^(+)CD127^(-)、TgAb、TPOAb、TRAb水平及甲亢/亚临床甲亢、甲减/亚临床甲减患者占比明显高于对照组,差异均有统计学意义(P<0.05);Pearson相关系数分析结果显示,CD3^(+)(r=0.579、0.602、0.563)、CD3^(+)CD4^(+)(r=0.612、0.637、0.606)、CD~4+CD25^(+)CD127^(-)(r=0.655、0.643、0.687)与TgAb、TPOAb、TRAb呈正相关(P<0.05);AIT组患者的Periostin、Notch1 m RNA分别为(4.27±1.40)μg/L、1.73±0.56,明显高于对照组的(2.86±0.49)μg/L、1.02±0.14,VitD、Treg/Th17分别为(17.82±5.09)ng/mL、2.82±0.97,明显低于对照组的(22.30±3.76)ng/mL、12.36±2.03,差异均有统计学意义(P<0.05);Pearson相关系数分析结果显示,Periostin(r=0.792、0.811、0.737)、Notch1 mRNA(r=0.812、0.775、0.792)与CD3^(+)、CD3^(+)CD4^(+)、CD4^(+)CD25+CD127-呈正相关(P<0.05),VitD(r=-0.687、-0.753、-0.799)与之呈负相关(P<0.05),且Periostin(r=-0.823)、Notch1 m RNA(r=-0.772)与Treg/Th17呈负相关(P<0.05),VitD(r=0.745)与之呈正相关(P<0.05)。结论Periostin、Notch1 mRNA在AIT患者血清中表达上调,VitD表达下调,各指标与AIT淋巴细胞浸润程度及Treg/Th17均具有一定相关性,可为临床判断病情提供参考,并对后续临床治疗具有一定指导价值。