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Spectroscopic Sensing Characteristics of Novel Osmium Carbonyl Complexes to DNA and Other Polyanions

American Journal of Analytical Chemistry 2021年第7期12卷 277-293页

作者： Gregory Ostner Cody Piotrowski Xinyao Ren Yu lei Mehrun Uddin Stacey Wong karen Chen lan Pham Elise Megehee Enju Wang Department of Chemistry St. John’s University Jamaica USA

In this research, the absorbance and luminescence response of two osmium(II) phenathrane (phen) carbonyl complexes to various DNA, heparin and i-carrageenan polyanions were studied. The [Os(phen)2CO(l)]2+ complexes with l either a 4-phenyl pyridine (4-phpy) or phenyl imidazole (phimd) group exhibit moderate luminescent intensity in the visible region, their intensities are highly altered by the addition of DNA and other polyanion samples. These luminescent responses to polyanions were also compared with the [Ru(phen)3]2+ complex. In ethanol solution, the presence of polyanions significantly enhanced the luminescent emission intensity of [Os(phen)2CO(l)]2+ complexes with a blue shift. While the polyanions all showed emission enhancement on the highly lumi-nescent [Ru(phen)3]2+ complex in ethanol solution with a red spectra shift. The [Os(phen)2CO(l)] 2+ with (phimd) ligand has the lowest emission in ethanol solution, its intensity can be enhanced up to 11 times in the presence of DNA polyanions. This enhancement for all the complexes in ethanol is mainly due to their electrostatic interaction with the anion sites and with some degree of ligand intercalation into the polyanion hydrophobic structure which reduced the solvent quenching of the complexes. The blue shift of the (4-phpy) and particularly (phimd) Os(II)CO complexes indicate an insertion of the (4-phpy) or (phimd) group into the polymer chains. The two new Os(II)CO complexes has great potential to be used as luminescence sensors for DNA and polyanion detection in the low micro molar range with high sensitivity.

关键词： Os(II)CO Complex Absorbance luminescence Spectroscopy DNA and Polyanion Sensing

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作者： (美)英格丽·格拉-洛佩兹(Ingrid Guerra-lópez)，(美)卡伦·希克斯(karen Hicks)

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Method Optimization Study on Isolation of Volatile Compounds by Headspace Solid-Phase Microextraction (HS-SPME) from Custard Apple (<i>Annona squamosa</i>l.) Pulp.

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Journal of Analytical Sciences, Methods and Instrumentation 2020年第3期10卷 59-77页

作者： Mércia de Sousa Galvão karen leticia de Santana Juliete Pedreira Nogueira Maria Terezinha Santos leite Neta Narendra Narain Departament of Food Engineering Federal University of Paraiba Jo&atilde o Pessoa Brazil laboratory of Flavor and Chromatographic Analysis PROCTA Federal University of Sergipe S&atilde o Cristóv&atilde o Brazil

Aroma is an important quality parameter, which can help in delaying degradative processes and hence understanding the volatile compounds that are part of an aroma is extremely important. Thus, the aim of this study was to isolate the volatile compounds present in custard apple (Annona squamosa l.) pulp by solid-phase microextraction (SPME) technique using 3 different fibers (DVB/CAR/PDMS, PDMS and PDMS/DVB). An experimental design was set up to evaluate the best extraction conditions wherein the variables were extraction temperature (minimum 28°C, maximum 62°C), ionic strength (minimum 0, maximum 30.0%) and sample concentration (min 1, max 99.0%). The separation of volatiles was achieved in chromatographic columns of different polarity (polar and non-polar) while identification of volatile compounds was performed by high resolution gas chromatography system coupled with mass spectrometry. The results obtained using 3 different fibers revealed the isolation of 71 compounds with fiber DVB/CAR/PDMS, while only 30 and 21 compounds were isolated using fibers PDMS/DVB and PDMS, respectively. The major classes of compounds identified were terpenes, esters, alcohols and aldehydes. Optimum conditions for obtaining higher number of volatiles for non-polar column were 45°C for extraction temperature, 15% of sodium chloride and 50% of pulp amount which resulted in isolation of a maximum of 78 peaks.

关键词： Flavor SPME Response Surface Methodology Volatiles Gas Chromatography-Mass Spectrometry

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一种新型水分散型IPBC杀菌剂及其性能

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精细与专用化学品 2008年第9期16卷 15-17页

作者：张明刚瞿欣 Winkowski karen 领先特品化学(上海)有限公司上海200233 美国国际特品公司

随着环保意识的不断提高和环保法规的逐步完善,涂料行业对VOC(挥发性有机化合物)和HMPs(有害物质)的控制进一步严格。我国现行的强制性国家标准中,内墙乳胶漆VOC含量要不超过200g/l,如果要获得绿色环保"十环标志",则VOC的含量要低于100... 详细信息

随着环保意识的不断提高和环保法规的逐步完善,涂料行业对VOC(挥发性有机化合物)和HMPs(有害物质)的控制进一步严格。我国现行的强制性国家标准中,内墙乳胶漆VOC含量要不超过200g/l,如果要获得绿色环保"十环标志",则VOC的含量要低于100克g/l。2007年1月1日起,欧盟国家实施新的漆类标准中,要求每升水性漆VOC含量应低于100g,溶剂性漆的VOC含量应低于每升400g。涂料的水性化趋势越来越明显,水性涂料占据了越来越大的市场份额。水性涂料以水为分散介质并富含各种可被微生物作为营养利用的添加剂,为微生物的生长繁殖提供了条件。当细菌、霉菌和酵母菌等微生物污染涂料后大量繁殖会导致涂料产生表面色变、pH值变化、使用性能变化、凝聚以及产生异味等一系列问题,从而使涂料产品失去价值造成巨大损失。随着水性涂料的广泛应用,控制微生物生长和繁殖从而避免涂料被污染,对于保证涂料产品的品质和使用效果是非常重要的。

关键词：水分散型性能变化强制性国家标准杀菌剂 VOC含量微生物污染挥发性有机化合物内墙乳胶漆

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汉娜的手提箱

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丛书名：岁月

2004年

作者：（加）凯伦·莱温（karen levine）林达译

该书采用了两名当事人的口述录音－－日本浩劫教育中心的史子和汉娜的哥哥乔治，让他们各自从自己的角度，讲述了半个多世纪前一个死于纳粹集中营的女孩的故事。

ISBN: (纸本)7540431733

关键词：文学美洲文学

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猪巴氏杆菌病

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国外畜牧学（猪与禽） 2014年第S1期34卷 14-26页

作者：高娃林靖凯 karen B. Register Susan l.Brockmeier Marten F. de Jong Carlos Pijoan 山东益生种畜禽股份有限公司

1相关性1880年,路易斯·巴斯德从禽霍乱病例中分离到了多杀性巴氏杆菌(Pasteurella multocida,Pm),从而确认巴氏杆菌属为致病微生物。之后,以他的名字命名了这个菌属。多杀性巴氏杆菌被确认为猪呼吸系统疾病的病原体已经超过125年。然而... 详细信息

1相关性1880年,路易斯·巴斯德从禽霍乱病例中分离到了多杀性巴氏杆菌(Pasteurella multocida,Pm),从而确认巴氏杆菌属为致病微生物。之后,以他的名字命名了这个菌属。多杀性巴氏杆菌被确认为猪呼吸系统疾病的病原体已经超过125年。然而,由于其可引起猪的渐进性萎缩性鼻炎(Atrophic Rhinitis,PAR)和肺炎,因此此细菌在世界各地持续显著影响着猪的健康。

关键词：猪巴氏杆菌病萎缩性鼻炎巴氏杆菌属多杀性巴氏杆菌 multocida Pasteurella 鼻

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Neuropathology of JC virus infection in progressive multifocal leukoencephalopathy in remission

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World Journal of Virology 2016年第1期5卷 31-37页

作者： karen S SantaCruz Gulmohor Roy James Spigel Elaine l Bearer Department of Pathology University of New MexicoUniversity of New Mexico Health Sciences Center Department of Neurology University of California Department of Pathology Presbyterian Hospital

AIM: To investigate the neuropathology of the brain in a rare case of remission following diagnosis of progressive multifocal leukoencephalopathy(PMl).METHODS: Consent from the family for an autopsy was obtained, clinical records and radiograms were retrieved. A complete autopsy was performed, with brain examination after fixation and coronal sectioning at 1 cm intervals. Fourteen regions were collected for paraffin embedding and staining for microscopic analysis. Histologic sections were stained with luxol blue, hematoxylin/eosin, and immunostained for myelin basic protein, neurofilament, SV40 T antigen and p53. The biopsy material was also retrieved and sections were stained with hematoxylin/eosin and immunostained for SV40 and p53. Sections were examined by American Board of Pathology certified pathologists and images captured ***: Review of the clinical records was notable for a history of ulcerative colitis resulting in total colectomy in 1977 and a liver transplant in 1998 followed by immune-suppressive therapy. Neurological symptoms presented immediately, therefore a biopsy was obtained which was diagnosed as PMl. Immunotherapy was adjusted and clinical improvement was noted. No subsequent progression was reported. Review of the biopsy demonstrated atypical astrocytes and enlarged hyperchromatic oligodendroglial cells consistent with JC virus infection. Strong SV40 and p53 staining was found in glial cells and regions of dense macrophage infiltration were present. On gross examination of the post-mortem brain, a lesion in the same site as the original biopsy in the cerebellum was identified but no other lesions in the brain were found. Microscopic analysis of this cerebellar lesion revealed a loss of myelin and axons, and evidence of axonal damage. This single burned-out lesion was equivocally positive for SV40 antigen with little p53 staining. Examination of thirteen other brain regions found no other occult ***: Our study reveals

关键词： Progressive multifocal leukoencephalopathy Progressive multifocal leukoencephalopathy JC virus Remission Demyelinating

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小儿麻醉相关性心跳骤停：儿科围手术期心跳骤停登记处的知识更新

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麻醉与镇痛 2008年第4期4卷 31-38页

作者： Sanjay M. Bhananker Chandra Ramamoorthy Jeremy M. Geiduschek karen l. Posner karen B. Domino Charles M. Haberkern John S. Campos leffrey P. Morray 邢军(译) 李成辉(校) Department of Anesthesiology University of Washington School of Medicine Seattle Washington Department of Anesthesiology Stanford University School of Medicine Palo Alto California Department of Anesthesiology Phoenix Children's Hospital and Valley Anesthesiology Consultants Phoenix Arizona 不详

背景小儿围手术期心跳骤停（POCA）登记处（1994至1997年14）最初的调查结果显示，药物相关性原因是小儿围手术期心跳骤停最常见的原因，例如氟烷B}起的心血管抑制。小儿麻醉技术的变化可能已经使麻醉过程中心跳骤停的原因发生了改变。... 详细信息

背景小儿围手术期心跳骤停（POCA）登记处（1994至1997年14）最初的调查结果显示，药物相关性原因是小儿围手术期心跳骤停最常见的原因，例如氟烷B}起的心血管抑制。小儿麻醉技术的变化可能已经使麻醉过程中心跳骤停的原因发生了改变。方法有将近80个为小儿提供麻醉的北美医疗机构自愿加入POCA登记处。这些机构均以标准化数据表格的形式，将每一例≤18岁的小儿围手术期心跳骤停病例匿名上报。据此我们分析了1998至2004年麻醉相关性心跳骤停的原因和相关因素。结果从1998至2004年，有193例（49％）心跳骤停与麻醉相关，其中药物相关性心跳骤停占所有心跳骤停的18％。而1994至1997年期间为37％（P〈0．05）。心血管方面是最常见的原因（占41％），其中失血导致的低血容量和输入库存血导致的高钾血症是最常见的、可确定的心血管原因。导致心跳骤停的呼吸性原因（27％）中，喉痉挛导致的气道梗阻最为常见。中心静脉导管置入过程中引起的血管损伤是设备相关性心跳骤停的最常见原因。在麻醉的不同阶段心跳骤停的原因也存在差异（P〈0．01）。心血管和呼吸方面的原因分别是手术中和手术后阶段最常见的原因。结论伴随氟烷在小儿麻醉中使用减少，与氟烷引起的心血管抑制相关的心跳骤停发生比例降低。通过预防措施可以降低心跳骤停原因各个分类中最常见病因的发生率。

关键词：心跳骤停小儿麻醉围手术期知识更新心血管抑制中心静脉导管置入药物相关性儿科

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Taxonomy and phylogeny of lopharia s.s., Dendrodontia,Dentocorticium and Fuscocerrena（Basidiomycota,Polyporales）

Taxonomy and phylogeny of Lopharia s.s., Dendrodontia,Dentoc...

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中国菌物学会2018年学术年会

作者： Shi-liang liu karen K.Nakasone Sheng-Hua Wu Shuang-Hui He Yu-Cheng Dai Institute of Microbiology Beijing Forestry University Center for Forest Mycology Research Northern Research StationU.S.Forest Service Department of Biology National Museum of Natural Science Beijing Advanced Innovation Centre for Tree Breeding by Molecular Design Beijing Forestry University

lopharia is a cosmopolitan genus, and it plays an important role in degradation of reduction in the forest ecosystem. Morphologically, lopharia s.s. is distinct from Dentocorticium, Dendrodontia and Fuscocerrena but are phylogenetically closely related as shown in phylogenetic studies. Eleven taxa of lopharia s.s., Dendrodontia, Dentocorticium and Fuscocerrena in Polyporales are included in the phylogenetic analyses of nuc rDNA ITS1-5.8S-ITS2（ITS）, D1-D2 domains of nuc 28 S rDNA（28S） and RNA polymerase II second-largest subunit（rpb2） sequences. New species lopharia resupinata and l. sinensis are described and *** resupinata, from southeastern China, is closely related to l. ayresii, and l. sinensis, from northern China, is related to l. cinerascens and l. mirabilis. lopharia mirabilis specimens from temperate to tropical areas with varied hymenophore configurations all cluster together in a fully supported clade. Dendrodontia and Fuscocerrena are shown to be synonyms of Dentocorticium, which is phylogenetically related to lopharia. Four new combinations, Dentocorticium bicolor, D. hyphopaxillosum, D. portoricense and D. taiwanianum, are proposed. Revised generic descriptions of lopharia and Dentocorticium are provided with keys to the six accepted species in each genus. A list of all names in lopharia and Dentocorticium are presented with their current taxonomic status. Type specimens of Dentocorticium brasiliense and D. irregular were examined and determined to be later synonyms of Punctularia subhepatica and Diplomitoporus daedaleiformis, respectively.

关键词： corticioid fungi dendrohyphidia species complex wood-inhabiting fungi

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口服抗栓药预防非瓣膜性心房颤动患者卒中：美国心脏协会／美国卒中协会对医疗卫生专业人员的科学建议

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国际脑血管病杂志 2012年第12期20卷 881-892页

作者： karen l. Furie larryB. Goldstein Gregory W. Albers Pooja Khatri Ron Neyens Mintu P. Turakhia Tanya N. Turan Kathryn A. Wood 严晓铭(译) 何晟(译) 丁妹(译) 柯开富(译) 美国心脏协会卒中委员会医疗质量和转归研究委员会心血管护理委员会临床心脏病学委员会以及周围血管病委员会南通大学附属医院神经内科 226001

成年心房颤动（atrial fibrillation，AF）患者的卒中发生率存在很大差异，其范围为每年1％～20％（平均4．5％／年），取决于合并症和既往脑血管事件病史。卒中风险分层十分重要，因为用于降低AF相关性卒中发生率的抗栓药的主要风险是... 详细信息

成年心房颤动（atrial fibrillation，AF）患者的卒中发生率存在很大差异，其范围为每年1％～20％（平均4．5％／年），取决于合并症和既往脑血管事件病史。卒中风险分层十分重要，因为用于降低AF相关性卒中发生率的抗栓药的主要风险是出血。对于华法林而言，这涉及到对出血风险（每年1％～12％）与缺血性事件风险的权衡，它通常被用于血栓栓塞风险最高的那些患者。

关键词：心房颤动患者卒中协会美国心脏协会卫生专业人员抗栓药科学建议非瓣膜性医疗

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