EH36MOD钢焊接CGHAZ的相变超塑性对提高疲劳寿命的贡献

研究了焊接ＣＧＨＡＺ的相变超塑性变形及其对疲劳寿命的作用。结果发现：（１）采用相同焊接循环与不同的拘束位移，所模拟的焊接ＣＧＨＡＺ中存在着相变超塑性现象。（２）该超塑性应变为１％时，其疲劳寿命要比无相变超塑性的提高１９％。（３）在无相变超塑性ＣＧＨＡＺ中，（Ｍ－Ａ）组元的形态基本上呈长条状；当相变超塑性应变增至１．０％时，（Ｍ－Ａ）组元变化成长条状与块状的混合型形态。     

云南省野生恒河猴病毒血清流行病学研究

对云南省野生恒河猴作了Ｂ病毒（ＢＶ）、猴爱滋病毒（ＳＩＶ）、猴Ｔ细胞白血病毒（ＳＴＬＶ）、猴Ｄ型逆转录病毒（ＳＲＶ）、轮状病毒（ＳＡｌ）、腺病毒（ＳＡＶ）、痘病毒（Ｍｏｎｋｅｙｐｏｘ）、麻疹病毒（Ｍｅａｓｌｅｓ）、柯赛基病毒Ｂ－１型（ＣｏｘｓａｃｋｉｅＢ１）和人巨细胞病毒（ＨＣＭＶ）等１０种病毒血清抗体及乙型肝炎病毒（ＨＢＶ）检测,结果表明,云南省野生恒河猴中,抗体阳性率较高的有ＳＡ１１（９０％）,ＳＡＶ（８３１％）,ＢＶ（４４６％）和Ｍｏｎｋｅｙｐｏｘｖｉｒｕｓ（２０６％）;３种逆转录病毒的抗体阳性率分别为ＳＴＬＶ－１（８８％）,ＳＲＶ（４７％）,ＳＩＶ（２２％）;未发现Ｍｅａｓｌｅｓ,和ＣｏｘｓａｃｋｉｅＢ－１病毒血清抗体及ＨＢＶ感染,但在１只动物血清中有ＨＣＭＶ抗体．病毒抗体阳性率与动物的年龄有关,成年猴明显高于未成年猴．对来自思茅地区、临沧地区和文山州动物的调查表明,Ｂ病毒相关抗体和逆转录病毒抗体阳性率有地区差异,思茅地区的野生恒河猴,抗体阳性率较高．     

肝炎患者红细胞免疫功能及与体液免疫功能的关系

检测１２１例各型肝炎患者红细胞免疫功能，以及大部分患者的体液免疫功能指标，并探讨两者间的相关性。结果显示：（１）各型肝炎患者及慢性乙肝病毒携带者ＲＢＣＣ３ｂＲＲ均明显低于正常人。急性肝炎急性期和中－重度慢性肝炎患者ＲＢＣ－ＩＣＲ均明显高于正常人。中－重度慢性肝炎患者ＲＢＣＣ３ｂＲＲ明显低于轻度患者，前者ＲＢＣ－ＩＣＲ明显高于后者；急性肝炎恢复期患者ＲＢＣＣ３ｂＲＲ明显高于急性期患者，前者的ＲＢＣ－ＩＣＲ却明显低于后者；（２）急性和慢性肝炎患者血清ＣＩＣ水平均明显升高，急性肝炎恢复期患者血清ＣＩＣ水平较急性期降低。慢性肝炎患者血清ＩｇＭ、ＩｇＧ、ＩｇＡ水平均有不同程度的升高。中－重度慢性肝炎患者血清Ｃ３、Ｃ４水平均明显下降；（３）急性肝炎急性期和恢复期患者ＲＢＣＣ３ｂＲＲ与血清ＣＩＣ水平均呈负相关，而他们的ＲＢＣ－ＩＣＲ与之呈正相关。中－重度慢性肝炎患者ＲＢＣＣ３ｂＲＲ与血清ＣＩＣ水平呈负相关，与血清Ｃ３、Ｃ４水平呈正相关。相反，其ＲＢＣ－ＩＣＲ与血清ＣＩＣ水平呈正相关，与Ｃ３、Ｃ４水平呈负相关。故临床上动态观察肝炎患者的红细胞免疫功能变化，有助于评估病情转归和病变程度。     

复合增聚型铁铝无机高分子絮凝剂PAFCS的红外光谱研究

利用煤矸石及硫铁矿渣制备出了一种新型无机高分子絮凝剂聚硫酸氯化铁铝（ＰＡＦＣＳ），研究了ＰＡＦＣＳ的红外（ＩＲ）光谱结构特征．ＩＲ谱分析表明ＰＡＦＣＳ是Ｆｅ（Ⅲ）十Ａｌ（Ⅲ）与羟基（－ＯＨ）以双羟桥为主结构连接的较复杂的高聚物．其ＩＲ图谱峰形与α－Ｆｅ２Ｏ３，α－ＦｅＯＯＨ及Ｆｅ（ＯＨ）３等明显不同．比较了ＰＡＦＣＳ，ＰＡＣ，ＰＦＳ，ＰＡＣＳ的光谱特征，表明ＰＡＦＣＳ与已知文献报道的絮凝剂ＰＡＣ，ＰＦＳ，ＰＡＣＳ有类似性，即由３１００～３６００ｃｍ（－１）处的ＯＨ伸缩振动及１６００～１６５０ｃｍ（－１）Ｈ－Ｏ－Ｈ弯曲振动的畸变，表明有结构羟基存在；在１１００ｃｍ（－１）附近Ｍ－ＯＨ－Ｍ伸缩振动峰为中等强度峰，证明有铁羟基或铝羟基以及聚合态存在．     

N,N—二乙基二硫代氨基甲酸烯丙基酯（ADC）的NMR研究

对Ｎ，Ｎ－二乙基二硫代氨基甲酸烯丙基酯（ＡＤＣ）的＾１Ｈ ＮＭＲ谱，＾１３Ｃ ＮＭＲ谱及Ｈ－＾１Ｈ．＾１３Ｃ－＾１Ｈ化学位移相关谱测定结果进行了讨论。对＾１３Ｃ ＮＭＲ和＾１Ｈ ＮＭＲ谱峰作出了归属，并确认了ＡＤＣ的链结构。     

新型1,4—二氮丁二烯液晶材料的合成及晶体结构？…

报道了９个新型１,４－二氮丁二烯「Ａｒ－Ｎ＝Ｃ（Ｒ）－Ｃ（Ｒ）＝Ｎ－Ａｒ,Ｒ＝Ｈ,Ｍｅ;Ａｒ＝ＣｎＨ２ｎ＋１Ｏ－Ｃ６Ｈ４,２,４－（Ｃ４Ｈ９Ｏ）（Ｍｅ）－Ｃ６Ｈ３」化和物的合成,并通过热台偏光显微镜对其就介晶性进形了研究,化合物９（Ａｒ－Ｎ＝Ｃ（Ｒ）＝Ｎ－Ａｒ,Ｒ＝Ｈ,Ａｒ＝２,４－（Ｍｅ）（Ｃ４Ｈ９Ｏ）Ｃ６Ｈ３）的单晶结构显示,晶体成单斜晶系,Ｐ２１／Ｃ空间群。晶胞参数为ａ＝０．７０７０３（３）     

乙烯—1—辛烯共聚物熔融接枝马来酸酐的研究

以过氧化二异丙苯（ＤＣＰ）为引发剂,在双螺杆挤出机上实现了乙烯１－辛然共聚物（ＰＯＥ）与马来酸酐（ＭＡＨ）的熔融接枝反应,实验表明,ＰＯＥ熔融接枝ＭＡＨ的反应过程中伴随着交联副反应的发生;当ＭＡＨ／ＤＣＰ≥２０时,体系中不产生凝胶,随着ＭＡＨ／ＤＣＰ比值的减小（ＤＣ用量的增加）凝胶含量增加,红外光谱的测试结果进一步证实了ＰＯＥ－ｇ－ＭＡＨ大分子的存在,此外,对ＰＯＥ熔融接枝ＭＡＨ过程的机理进行了初     

用￣1H－NMR方法研究丙烯酸酯类与N－芳基取代甲基丙烯酰胺的共聚合

本文测定了一系列丙烯酸酯（包括：甲基丙烯酸甲酯，甲基丙烯酸异冰片酯，丙烯酸酯等）与Ｎ－芳基取代甲基丙烯酰胺，（包括：Ｎ－苯基甲基丙烯酰胺（Ｎ－φＭＡ），Ｎ－对甲苯基甲基丙烯酰胺（Ｎ－ｐ－ＴＭＡ），Ｎ－邻甲苯基甲基丙烯酰胺（Ｎ－ｏ－ＴＭＡ），Ｎ－对澳苯基甲基丙烯酰胺（Ｎ－ｐ－ＢｒＰｈＭＡ），Ｎ－对氯苯基甲基丙烯酰胺（Ｎ－ｐ－ＣｌＰｈＭＡ），Ｎ－对硝基苯基甲基丙烯酰胺（Ｎ－ｐ－ＮＰｈＭＡ），Ｎ－邻硝基苯基甲基丙烯酰胺（Ｎ－ｏ－ＮＮＰｈＭＡ），Ｎ－萘基甲基丙烯酰胺（Ｎ－α－ＨＭＡ））的共聚物￣１Ｈ－ＮＭＲ谱。用￣１Ｈ－ＮＭＲ方法测定了共聚物的组成，估算了共聚体系中各单体的竞聚率，比较了各种单体的反应活性。     

加州鲈鱼食性驯化技术要点

加州鲈鱼食性驯化技术要点徐如卫，江锦坡（浙江水产学院水产养殖系，宁波３１５０１０）ＴＥＣＨＮＯＬＯＧＩＣＡＬＫＥＹＳＴＯＤＯＭＥＳＴＩＣＡＴＩＯＮＯＦＦＯＯＤＨＡＢＩＴＯＦＬＡＲＧＥ－ＭＯＵＴＨＢＬＡＣＫＢＡＳＳＭＩＣＲＯＰＴＥＨＵＳＳＡＬＭＯＩＤＥ...     

COHERENT OSCILLATORY WAVES FOR MULTIDIMENSIONAL HYPERBOLIC SYSTEMS

ＣＯＨＥＲＥＮＴＯＳＣＩＬＬＡＴＯＲＹＷＡＶＥＳＦＯＲＭＵＬＴＩＤＩＭＥＮＳＩＯＮＡＬＨＹＰＥＲＢＯＬＩＣＳＹＳＴＥＭＳＣｈｅｎＭｉｎｇ１）ＱｉｕＱｉｎｇｊｉｕ２）（１）ＤｅｐａｒｔｍｅｎｔｏｆＲａｄｉｏＥｎｇｉｎｅｅｒｉｎｇ，ＳｏｕｔｈｅａｓｔＵ...     

ICAM-1,TNF-α在原发性肝癌中表达的相关性分析

采用酶联免疫吸附试验检测原发性肝癌及正常体检人群各56例血清中ICAM-1和TNF-α的表达,免疫组化方法检测56例原发性肝癌组织标本的ICAM-1和TNF-α蛋白的表达.结果显示ICAM-1和TNF-α在原发性肝癌血清中存在异常表达(p<0.05),不同组织分型原发性肝癌患者血清中ICAM-1水平、TNF-α水平无差异(p>0.05),原发性肝癌组织中ICAM-1和TNF-α蛋白的表达呈正相关(r=0.216,p=0.000).ICAM-1和TNF-α的表达可能是原发性肝癌病理进程中的普遍现象,检测原发性肝癌患者血清ICAM-1和TNF-α含量,可为患者个性化治疗提供实验室依据,改善患者的预后.     

NGAL基因在原发性肝癌中的表达及其功能分析

NGAL基因是Lipocalin家族成员,与MMP9的功能密切相关,在乳腺癌、食管癌等多种恶性肿瘤中异常表达,为了研究其在原发性肝癌中的表达及功能,通过荧光实时定量PCR法检测了NGAL基因在23对肝癌组织标本中的表达情况.结果显示：在12例肝癌组织中NGAL显著上调表达,占总样本数的52.17%（P〈0.05）,提示了NGAL基因的表达水平可能与肝癌的发生发展过程有关.通过构建绿色荧光蛋白融合表达载体,用脂质体法转化肝癌细胞株SMMC-7721进行瞬时表达.细胞周期实验显示NGAL的表达可促使SMCC-7721细胞从G1期向S期转化,转化NGAL的细胞中S期细胞显著增多（P〈0.05）,提示其可能具有促进肝癌细胞生长的功能;细胞凋亡实验发现NGAL的表达可显著抑制低血清诱导下的细胞凋亡率（P〈0.05）,提示其可能参与抑制肝癌细胞的凋亡.     

Preoperative diagnosis of hepatocellular carcinoma patients with bile duct tumor thrombus using deep learning method

Preoperative diagnosis of bile duct tumor thrombus (BDTT) is clinically important as the surgical prognosis of hepatocellular carcinoma (HCC) patients with BDTT is significantly different from that of patients without BDTT. Although dilated bile ducts (DBDs) can act as biomarkers for diagnosing BDTT, it is easy for doctors to ignore DBDs when reporting the imaging scan result, leading to a high missed diagnosis rate in practice. This study aims to develop an artificial intelligence (AI) pipeline for automatically diagnosing HCC patients with BDTT using medical images. The proposed AI pipeline includes two stages. First, the object detection neural network Faster R-CNN was adopted to identify DBDs; then, an HCC patient was diagnosed with BDTT if the proportion of images with at least one identified DBD exceeded some threshold value. Based on 2354 CT images collected from 32 HCC patients (16 with BDTT and 16 without BDTT, 1∶1 matched), the proposed AI pipeline achieves an average true positive rate of 0.92 for identifying DBDs per patient and a patient-level true positive rate of 0.81 for diagnosing BDTT. The AUC value of the patient-level diagnosis of BDTT is 0.94 (95% CI: 0.87, 1.00), compared with 0.71 (95% CI: 0.51, 0.90) achieved by random forest based on preoperative clinical variables. The high accuracies demonstrate that the proposed AI pipeline is successful in the diagnosis and localization of BDTT using CT images.     

免疫PCR方法检测乳腺癌患者血清抗p53蛋白抗体

目的为乳腺癌诊断提供血清学新方法.方法免疫PCR方法检测血清抗p53蛋白抗体,酶免疫组化方法检测组织p53蛋白表达.结果乳腺癌患者血清抗p53蛋白抗体阳性率为39.5%,而非癌患者和正常人血清抗p53蛋白抗体均为阴性,乳腺癌患者血清中抗p53蛋白抗体显著高于非癌患者和正常人(P＜0.01).p53蛋白阳性表达的乳腺癌患者抗p53蛋白抗体阳性率为64.2%,明显高于p53蛋白阴性表达组,血清p53抗体测定与p53蛋白表达密切相关(P＜0.01).结论检测血清抗p53蛋白抗体是检测组织p53蛋白理想的替代工具抗p53蛋白抗体可以作为乳腺癌血清学诊断新标志,用于乳腺癌的普查和早期诊断.     

Molecular cloning of ICAM-3, a third ligand for LFA-1, constitutively expressed on resting leukocytes.

The co-ordinated function of effector and accessory cells in the immune system is assisted by adhesion molecules on the cell surface that stabilize interactions between different cell types. Leukocyte function-associated antigen 1 (LFA-1) is expressed on the surface of all white blood cells and is a receptor for intercellular adhesion molecules (ICAM) 1 and 2 (ref. 3) which are members of the immunoglobulin superfamily. The interaction of LFA-1 with ICAMs 1 and 2 provides essential accessory adhesion signals in many immune interactions, including those between T and B lymphocytes and cytotoxic T cells and their targets. In addition, both ICAMs are expressed at low levels on resting vascular endothelium; ICAM-1 is strongly upregulated by cytokine stimulation and plays a key role in the arrest of leukocytes in blood vessels at sites of inflammation and injury. Recent work has indicated that resting leukocytes express a third ligand, ICAM-3, for LFA-1 (refs 11, 12). ICAM-3 is potentially the most important ligand for LFA-1 in the initiation of the immune response because the expression of ICAM-1 on resting leukocytes is low. We report the expression cloning of a complementary DNA, pICAM-3, encoding a protein constitutively expressed on all leukocytes, which binds LFA-1. ICAM-3 is closely related to ICAM-1, consists of five immunoglobulin domains, and binds LFA-1 through its two N-terminal domains.     

血府逐瘀汤对动脉粥样硬化大鼠细胞间黏附分子和脂质过氧化物的影响

为探讨血府逐瘀汤对动脉粥样硬化(atherosclerosis,AS)大鼠主动脉壁细胞间黏附分子-1(ICAM-1)表达水平和脂质过氧化物的影响,将40只大鼠随机分为正常对照组、模型组、血脂康组、血府逐瘀汤高剂量组、血府逐瘀汤低剂量组,对照组饲喂正常饲料,模型组给予高脂饲料,治疗组在给予高脂饲料的同时给予治疗药物,12周后免疫组化法观察主动脉壁ICAM-1的表达水平、检测血清超氧化物歧化酶(SOD)、丙二醛(MDA)的含量.结果显示:模型组ICAM-1的表达水平呈强阳性表达,治疗组各组均呈弱阳性表达,各组间均有统计学意义(P<0.05).治疗组SOD水平较模型组显著升高,MDA含量显著降低,各组间均有统计学意义(P<0.05).这说明血府逐瘀汤可以通过下调ICAM-1的表达,清除脂质过氧化物、保护内皮细胞起到抗AS的作用.     

P53和MDM2蛋白表达对肝细胞肝癌预后判断的意义

目的 :研究肝细胞肝癌中突变型P5 3和MDM2蛋白的表达对临床预后判断的意义。方法 :应用免疫组织化学方法 ,检测 72例原发性肝细胞肝癌手术切除标本突变型P5 3、MDM2蛋白的表达 ;与临床病理学指标和术后生存期进行分析比较。结果 :突变型P5 3蛋白阳性 2 8例(38 89% ) ,MDM2蛋白阳性 2 3例 (31 94 % ) ,二者阳性表达有相关性 (r =0 2 4 8,P <0 0 5 )。突变型P5 3、MDM2蛋白阳性表达病例生存率明显低于突变型P5 3、MDM2蛋白阴性表达病例 (P <0 0 1)。突变型P5 3和MDM2蛋白表达均阳性病例 13例 (18 0 6 % ) ,中位生存期的生存率最低。单因素及多因素分析显示 ,突变型P5 3蛋白表达、MDM2蛋白表达、肿瘤大小与中位生存期的生存率有关 ,MDM2是统计学上最有意义的独立预后指标 (P <0 0 0 0 1)。结论 :应用免疫组织化学方法检测突变型P5 3和MDM2蛋白的表达可作为原发性肝细胞肝癌预后判断的指标。     

Cloning and characterization of a new intercellular adhesion molecule ICAM-R.

The human intercellular adhesion molecules ICAM-1, ICAM-2 and their counter-receptors, the beta 2 or leukointegrins, mediate a variety of homotypic and heterotypic leukocyte and endothelial cell-cell adhesions central to immunocompetence. It has been found that cell-cell adhesion which is dependent on expression of the leukocyte function-associated antigen LFA-1 is not always blocked completely by antibodies raised against ICAM-1 and ICAM-2. Other leukointegrin ligands therefore probably exist, such as a glycoprotein of M(r) 124K that binds LFA-1 and has been designated ICAM-3 on the basis of this function. We have molecularly cloned a new member of the ICAM family, ICAM-R, which is related to ICAM-1 and ICAM-2. The complementary DNA encoding ICAM-R is 1,781 base pairs long and the protein has five extracellular immunoglobulin-family type domains. The mature cell-surface form of the ICAM-R protein has an M(r) which varies from 116 to 140K in a cell type-specific fashion. Overall identities in protein sequence with ICAM-1 and ICAM-2 are 48% and 31% respectively, with the degree of similarity varying between individual domains. The high level of expression of ICAM-R on resting leukocytes of all lineages and its lack of expression on either resting or cytokine-activated endothelial cells indicates a pattern of expression distinct from ICAM-1 and ICAM-2. In common with ICAM-1 and ICAM-2, ICAM-R is a ligand for the beta 2-integrin CD11a/LFA-1 (CD18).     

Functional cloning of ICAM-2, a cell adhesion ligand for LFA-1 homologous to ICAM-1

The leukocyte adhesion molecule LFA-1 mediates a wide range of lymphocyte, monocyte, natural killer cell, and granulocyte interactions with other cells in immunity and inflammation. LFA-1 (CD11a/CD18) is a receptor for intercellular adhesion molecule 1 (ICAM-1, CD54), a surface molecule which is constitutively expressed on some tissues and induced on other in inflammation. Induction of ICAM-1 on epithelial cells, endothelial cells and fibroblasts mediates LFA-1-dependent adhesion of lymphocytes. Several lines of evidence have suggested the existence of a second LFA-1 ligand: homotypic adhesion of one cell line was inhibited by a monoclonal antibody to LFA-1, but not by one to ICAM-1; there exists an LFA-1-dependent, ICAM-1-independent pathway of adhesion to endothelial cells; and also, there are some types of target cells in which LFA-1-dependent T-lymphocyte adhesion and lysis are independent of ICAM-1. We have cloned this second ligand, designated ICAM-2, using a novel method for identifying ligands of adhesion molecules. ICAM-2 is an integral membrane protein with two immunoglobulin-like domains, whereas ICAM-1 has five. Remarkably, ICAM-2 is much more closely related to the two most N-terminal domains of ICAM-1 (34% identity) than either ICAM-1 or ICAM-2 is to other members of the immunoglobulin superfamily, demonstrating the existence of a subfamily of immunoglobulin-like ligands that bind the same integrin receptor.     

膳食5'-核苷酸对大鼠酒精性肾损伤保护作用的研究

 为研究膳食5'-核苷酸对大鼠酒精性肾损伤的保护作用,选取35只SPF级雄性Wistar大鼠,随机分成5组：普通对照组、酒精组、葡萄糖等热量组、酒精+0.04%核苷酸干预组、酒精+0.16%核苷酸干预组。连续灌胃8周后,测定体重、肾体比、血肌酐（SCr）、尿肌酐（UCr）、血尿素氮（BUN）及24 h尿蛋白等相关指标;计算内生肌酐清除率（Ccr）;检测血清炎症因子细胞间黏附分子-1（ICAM-1）、单核细胞趋化因子-1（MCP-1）水平;HE染色观察肾脏组织病理学改变;免疫组化法观察肾脏足细胞标志蛋白PCX-1、肾间质转化生长因子-β（TGF-β）和纤连蛋白（FN）的表达。结果表明：膳食5'-核苷酸能够降低酒精引起的大鼠24 h尿蛋白、血肌酐升高并提高内生肌酐清除率（P<0.05）,0.16%核苷酸干预组还能显著降低酒精引起的大鼠血尿素氮升高（P<0.05）;减轻酒精导致的肾脏组织结构病理改变及血清炎症因子ICAM-1、MCP-1水平的升高（P<0.05）;同时减轻甚至逆转酒精导致的肾脏PCX-1、TGF-β和FN表达的改变。由此可知,膳食5'-核苷酸可以通过减轻血液炎症反应,调节肾脏蛋白质分子的表达,对酒精造成的大鼠肾损伤产生一定的保护作用。