Ag2CO3溶胶中PABA表面增强拉曼光谱及增强机制的探讨

首次观测到Ａｇ２ＣＯ３溶胶体系中的吸附分子（对氨基苯甲酸ＰＡＢＡ）表面增强拉曼散射（ＳＥＲＳ）效应特强，该体系对ＰＡＢＡ的增强程度比Ａｇ胶还强。同时，分别向该体系加入少量的Ｓ２Ｏ３，Ｆｅ（ＣＮ）６，Ｈ２Ｏ２和ＮＯ３－溶液后，观测其对ＰＡＢＡ的ＳＥＲＳ谱带强度的影响，探讨该体系的增强机制。结果表明，胶体表面的Ａｇ＋或Ａｇδ＋是该体系的ＳＥＲＳ活位吸附点，而表面络合物对其ＳＥＲＳ起到一定的作用。     

乙丙三元橡胶磺酸钴离聚体膜的富氧性能研究

通过磺化、中和反应制备了乙丙三元橡胶（ＥＰＤＭ）磺酸钴离聚体（Ｃｏ（Ⅱ） Ｓ ＥＰＤＭ）膜并研究了其富氧性能．结果发现，该膜对分子氧具有促进输送作用，其原因被认为是在离聚体中可能形成了一种高分子钴络合物结构．这种络合物在其空位上能够与分子氧进行快速可逆的结合．ＥＳＲ谱提供了钴氧结合的证据     

中位—四（4—N—氰甲基吡啶）卟啉—铜（Ⅱ）络合物及其与脱氧核糖核酸…

本文在银胶活性基质上获得了Ｃｕ（Ⅱ）的中位－四（４－Ｎ－氰甲基吡啶）卟啉络合物Ｃｕ（Ⅱ）ＮＡＣＮ的表面增强喇曼光谱光谱，并与其ＲＲＳ光谱作了比较，讨论了ＰＨ值和Ｃｕ（Ⅱ）ＮＡＣＮ的复合物的ＳＥＲＳ光谱的影响，研究了小牛胸腺双链ＤＮＡ及其变性ＤＮＡ与Ｃｕ（Ⅱ）ＮＡＣＮ的复合物的ＳＥＲＳ光谱，指出Ｃｕ（Ⅱ）ＮＡＣＮ是通过吡啶氮和卟啉核共同与银胶作用的，Ｃｕ（Ⅱ）ＮＡＣＮ是斜向吸附在银表面上的，最佳ＰＨ     

RE（NO3）3与丝氨酸间配合行为的半微量相平衡研究

测定了ＲＥ（ＮＯ３）３－Ｓｅｒ－Ｈ２Ｏ（ＲＥ＝Ｓｍ，Ｇｄ，Ｙｂ）三元体系在２５℃的溶度和饱和溶液折光率，各体系的溶度曲线和饱和溶液折光曲线均由四支组成，分别与ＲＥ（ＮＯ３）３．ｎＨ２Ｏ（ＲＥ＝Ｓｍ，Ｇｄ，ｎ＝６；ＲＥ＝Ｙｂ，ｎ＝５）配合物ＲＥ（Ｓｅｒｉｍｅ）（ＮＯ３）３．４Ｈ２Ｏ（一致溶解化合物），ＲＥ（Ｓｅｒｉｎｅ）４（ＮＯ３）３．６Ｈ２Ｏ（不一致溶解化合物）和Ｓｅｒｉｎｅ相对应。     

STUDIES ON THE TOTAL SYNTHESIS OF（－）－（2R，5S）－2－METHYL－5－HYDROXYMETHYL－δ－VALEROLACTONE

ＳＴＵＤＩＥＳ　ＯＮ　ＴＨＥ　ＴＯＴＡＬ　ＳＹＮＴＨＥＳＩＳ　ＯＦ（－）－（２Ｒ，５Ｓ）－２－ＭＥＴＨＹＬ－５－ＨＹＤＲＯＸＹＭＥＴＨＹＬ－δ－ＶＡＬＥＲＯＬＡＣＴＯＮＥＳＴＵＤＩＥＳＯＮＴＨＥＴＯＴＡＬＳＹＮＴＨＥＳＩＳＯＦ（－）－（２Ｒ，５Ｓ）－...     

氨基酸锗类化合物对肿瘤放疗的增敏作用

研究了氨基酸锗类化合物对肿瘤放疗的增敏作用，其中９１３６对Ｈｅｌａ－Ｓ３细胞乏氧增敏比（ＳＥＲ）为１．５７，用７３９纯种小鼠实验，ＬＤ５０为２２９０ｍｇ／ｋｇ体重，以肿瘤生长延缓天数作为评价指标，肿瘤乏氧时，ＳＥＲ为１．４６；肿瘤有氧时，ＳＥＲ为１．６０。     

A NOVEL SYNTHETIC METHOD FOR THE CLUSTERS FeCo_2（CO）_9－（RCCR）（R＝MeO_2C，EtO_2C）．X－RAY CRYSTAL STRUCTURE ANALYSES OF THE CLUSTERS FeCo_2（CO）_9（MeO_2CCCCO_2Me）andCo_4（CO）_（10）－（EtO_2CCCCO_2Et）

ＡＮＯＶＥＬＳＹＮＴＨＥＴＩＣＭＥＴＨＯＤＦＯＲＴＨＥＣＬＵＳＴＥＲＳＦｅＣｏ_２（ＣＯ）_９－（ＲＣＣＲ）（Ｒ＝ＭｅＯ_２Ｃ，ＥｔＯ_２Ｃ）．Ｘ－ＲＡＹＣＲＹＳＴＡＬ　ＳＴＲＵＣＴＵＲＥ　ＡＮＡＬＹＳＥＳ　ＯＦ　ＴＨＥ　ＣＬＵＳＴＥＲＳ　ＦｅＣｏ_２（?..     

MORE FACILE SYNTHESES TO THE SEX PHEROMONE COMPONENTS OF THE WINTER MOTH（OPEROPHTERABRUMATAL．（LEPIDOPTERA：GEOMETRIDAE）：（3Z，6Z，9Z）－3，6，9－NONADECATRIENE，（6Z，9Z）－6，9－NONADECADIENE

ＭＯＲＥＦＡＣＩＬＥＳＹＮＴＨＥＳＥＳＴＯＴＨＥＳＥＸＰＨＥＲＯＭＯＮＥＣＯＭＰＯＮＥＮＴＳＯＦＴＨＥＷＩＮＴＥＲＭＯＴＨ（ＯＰＥＲＯＰＨＴＥＲＡＢＲＵＭＡＴＡＬ．（ＬＥＰＩＤＯＰＴＥＲＡ：ＧＥＯＭＥＴＲＩＤＡＥ）：（３Ｚ，６Ｚ，９Ｚ）－３，６，９－...     

SYNTHESIS OF CHIRAL TETRAHEDRAL TRANSITION METAL CARBONYL CLUSTERS SFeCoM（CO）_8（RCOCp）（M＝Mo，W；R＝H，CH_3，C_2H_5O）AND THE CRYSTAL STRUCTURE OF SFeCoW（CO）_8（C_2H_5O_2CCp）

ＳＹＮＴＨＥＳＩＳＯＦＣＨＩＲＡＬＴＥＴＲＡＨＥＤＲＡＬＴＲＡＮＳＩＴＩＯＮＭＥＴＡＬＣＡＲＢＯＮＹＬＣＬＵＳＴＥＲＳＳＦｅＣｏＭ（ＣＯ_８（ＲＣＯＣｐ）（Ｍ＝Ｍｏ，Ｗ；Ｒ＝Ｈ，ＣＨ_３，Ｃ_２Ｈ_５Ｏ）ＡＮＤ　ＴＨＥ　ＣＲＹＳＴＡＬ　ＳＴＲＵＣＴＵＲＥ...     

PREPARATION， ELECTRICAL PROPERTIES AND CRYSTAL STRUCTURE OF TWO NEW CHARGE－TRANSFER SALTS （BEDT－TTF）＿3Cu＿2Brx AND （TTM－TTF） （Cu＿2Bry） （y～4．72）

ＰＲＥＰＡＲＡＴＩＯＮ，　ＥＬＥＣＴＲＩＣＡＬ　ＰＲＯＰＥＲＴＩＥＳ　ＡＮＤ　ＣＲＹＳＴＡＬ　ＳＴＲＵＣＴＵＲＥ　ＯＦ　ＴＷＯ　ＮＥＷ　ＣＨＡＲＧＥ－ＴＲＡＮＳＦＥＲ　ＳＡＬＴＳ　（ＢＥＤＴ－ＴＴＦ）＿３Ｃｕ＿２Ｂｒｘ　ＡＮＤ　（ＴＴＭ－ＴＴＦ）　（...     

Diagnostic Classification of Normal Persons and Cancer Patients by Using Neural Network Based on Trace Metal Contents in Serum Samples

IntroductionIt is well known that exposure to toxic substances may cause various cancers. These sub-stances include various organic compounds and inorganic elements. From the viewpoint ofcancer prevention and diagnosis, the studies on the relationship between the cause of cancerand the levels of toxic substances have a great imPOrtance. The correlation between concentra-tions of manganese, copper, zinc, arsenic, njckel, chromium, and iron in serum and bloodsamples and various cancers has been…     

柔红霉素和阿霉素自旋标记衍生物的合成与抗肿瘤活性

合成了5个新的柔红霉素及阿霉素的氮氧自由基自旋标记衍生物(5_9),经元素分析,IR,MS和ESR分析确证了其组成和结构,并对它们进行了抑制小鼠白血病P388、小鼠黑色素癌B16、人胃腺癌MGC和人肝癌SMMC7721细胞的体外筛选.初步药理试验表明,化合物5_9对4种瘤株均有一定的抑制活性,其中化合物9的活性与阿霉素相当.     

傅里叶变换中红外光谱技术用于人体胃镜样品检测的新方法

应用傅里叶变换红外光谱(FTIR)测定了184例胃镜样品,总结不同病变类型组织的光谱特征,并与病理结果进行比较.实验结果表明,由于不同类型病变组织会在其分子组成和结构上发生相应改变,浅表性胃炎、萎缩性胃炎和胃癌组织具有不同的FTIR光谱,可据此进行胃镜样品疾病类型和病变程度的判别.研究结果表明,FTIR技术有望发展成为一种用于胃镜样品无创、快速、准确的在体临床诊断的新方法.     

Einige Aspekte der Instrumentellen Neutronen-Aktivierungsanalyse Biologischer Materialien

The use of low temperature irradiation, lyophilisation and synthetic multielement standards in the INAA of biological samples are described. Changes of trace element concentration during the growth of a tumour and between normal, gastritic and tumourous mucous membrane of the stomach are demonstrated. Trace elements are also determined in histone fractions.      

Sensitivity & Specificity oF Dr-70™ Lung Cancer Immunoassay

ABSTRACT

A multi-center study in the U.S. and China involving a total of 393 healthy subjects and 203 lung cancer patients was conducted to investigate the utility of DR-70? immunoassay to detect lung cancer. Interference to DR-70? test due to different disease states and blood collection procedures were also investigated. Benign and non-cancer diseases that can give rise to elevated DR-70? levels included pneumonia, lung infection, burns, trauma due to surgery, arthritis, renal failure, sepsis etc. The study also showed that most consistent DR-70? test results were obtained when blood was collected in vacutainers containing SST gel and clot activator. It is important that the DR-70? test not be performed on samples of patients suffering from the aforementioned diseases. As these non-cancer disease states and improper blood collection procedures may lead to false positive results.     

Real-time electrical impedance-based measurement to distinguish oral cancer cells and non-cancer oral epithelial cells

In this study, electrical impedance-based measurements were used to distinguish oral cancer cells and non-cancer oral epithelial cells based on their cellular activities on the microelectrodes in a real-time and label-free manner. CAL 27 and Het-1A cell lines were used as the models of oral cancer cells and non-cancer oral epithelial cells, respectively. Various cellular activities, including cell adhesion, spreading, and proliferation were monitored. We found that both the kinetics of cell spreading and the static impedance-based cell index were feasible to distinguish the two cell types. At each given cell number, CAL 27 cell spreading produced a smaller cell index change rate that was 60–70% of those of Het-1A cells. When cells were fully spread, CAL 27 cells generated a cell index more than four times greater than that of Het-1A cells. Since cell spreading and attachment occurs in the first few hours when they were cultured on the microelectrodes, this impedance-based method could be a rapid label-free and non-invasive approach to distinguish oral cancer cells from non-cancer oral epithelial cells. Cell viability analysis was performed along with the impedance-based analysis. Confocal microscopic imaging analysis showed the difference in cell morphology and the thickness of cell monolayers between the two cell types.     

Feasibility study for diagnosis of stomach adenoma and cancer using IR spectroscopy

The feasibility of infrared (IR) spectroscopy as a biomedical analysis tool for the diagnosis of stomach malignancy including adenoma and cancer has been studied using unstained biopsy samples. Biopsy samples were acquired from 11 subjects. IR spectra were collected for these samples using a microscope (aperture: 25 μm × 25 μm). The samples were stained again and the spots where the IR spectra were collected were re-examined by a pathologist to ensure the spectra represented the correct diagnostic information. The spectral features were compared among the averaged spectra of normal and malignant tissues. The spectral contrasts could be correlated to the differences in the molecular structure of the membrane lipids of the two tissue types as well as the variation in their glycogen contents. However, the spectral features between the adenoma and cancer tissues could not be distinguished. Initially we used principal component analysis (PCA) to examine the degree of separation between tissue types. Soft independent modeling of class analogies (SIMCA) was employed to evaluate the prediction accuracy of IR spectroscopy for the diagnosis of stomach adenoma and cancer. The prediction accuracies for normal, adenoma and cancer tissues were 77%, 30% and 87%, respectively, using SIMCA. IR microscopy successfully differentiated normal and malignant tissues. However, a more sophisticated algorithm will be required in order to effectively extract relevant information for the differentiation between stomach adenoma and cancer.     

羟自由基的分析研究进展

本文着重对电子自旋捕集法、高效液相色谱法和化学发光法在羟自由基检测中的应用情况进行了评述,引用文献41篇。     

生物样本中的甲基苯丙胺和氯胺酮含量的检测研究及其体内分布初探

建立了生物样本中甲基苯丙胺和氯胺酮的定量检验方法,该方法应用固相萃取与工作曲线气相色谱法(GC/NPD)对中毒者血、尿、胃内容、肝、脑等检材进行含量测定.通过实际案件,验证了该法具有样品处理简单、提取效率高、分析速度快等优点.案件数据表明,由口服引起的中毒途径,胃内容的含量最高,其次是尿、肝、脑、血等检材,进一步证实了...     

ESR测年法中样品总剂量的测定

ESR(电子自族共振)方法测定第四纪地质样品的总剂量在ESR测年法中占有重要的地位。该法为ESR谱仪的研究和应用开辟了一个新的领域。本文通过作者近几年来对化石、沉积物、石笋、黄土石英等样品的ESR研究,以及对ESR测年法所进行的一些基础研究,较详细地介绍了ESR测年法中测定总剂量TD方法和可能导致误差产生的各种因素及解决办法。