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用于制备聚氨酯纳米复合物的高岭石粒子的表征(英文)

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无机化学学报 2003年第11期19卷 1261-1265页

作者：李再峰王义银 luba s.kotlyar Keng H.Chung 青岛科技大学化学与分子工程学院青岛266042 西安交通大学管理学院西安710049 ICPET National Research Council1200 Montreal RoadOttawaOntario syncrude Canada Ltd. Edmonton Research Centre9421-17th AvenueEdmontonAlberta

Clay such as kaolinite, is commonly used as an additive to modify the thermal properties of polymer. In this paper, the morphology, composition, shape and structure of kaolinite was characterized by various advanced techniques. The TEM/ EDX data showed that the kaolinite had a larger particle size and a si/Al ratio of 1.8. The individual particle of kaolinite was a single crystalline. TEM also showed that these particles were always stacked together due to the presence of electrostatic cohesive energy and hydrogen bond between plaletes. The PAs FTIR spectra showed that no absorbance of hydroxyl group for hydration water in hydrogen bond region or at 1650cm- 1 was observed at room temperature. It meant a little ability to adsorb water for kaolinite particle. Kaolinite clay also showed no change for its PAs FTIR spectra with increasing temperature. The TGA results revealed that kaolinite almost doesn′ t lose weight at 60℃ due to loss of dehydration of absorbed water, however, it will decomposed around 510℃ and lose its hydroxyl functional group in the form of water (dehydroxylation). The result is consistent with that of PAs FTIR analysis. This suggests that the structural hydroxyl group on the surface of individual kaolinite clay particle is very stable below 500℃ , and the kaolinite composed polymer could be got by the reaction of its stable structural hydroxyl group with isocynate group of polyurethane prepolymer.

关键词：制备聚氨酯纳米复合聚合物高岭石粒子表征

Athabasca油砂沥青中重组分的分子模拟

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化工学报 2003年第1期54卷 9-17页

作者：高金森徐春明 luba s.kotlyar Keng H.CHUNG 石油大学重质油加工国家重点实验室北京102249 加拿大国家研究院加拿大合成油有限公司埃德蒙顿研究中心

利用分子模拟技术对加拿大Athabasca油砂沥青超临界萃取分馏残渣组分的化学分子结构进行了研究 ,首先选用长度不同的桥链构建了其三维平均结构 ,然后采用分子力学 (MM)和分子动力学 (MD)方法得到能量最低也即最稳定的构象 .研究发现 ,... 详细信息

利用分子模拟技术对加拿大Athabasca油砂沥青超临界萃取分馏残渣组分的化学分子结构进行了研究 ,首先选用长度不同的桥链构建了其三维平均结构 ,然后采用分子力学 (MM)和分子动力学 (MD)方法得到能量最低也即最稳定的构象 .研究发现 ,即使分子的二维结构相同 ,其三维结构差别也很大 ,由此可见仅用二维模型来表征重质油大分子的结构和物理化学性质远远不够 .另外 ,分子模拟还可以预测沥青质残渣中最有可能存在的桥链长度 .Athabasca沥青残渣组分中长度为C5到C7的桥链存在的可能性最大 ,而C1和C2桥链则由于其总能量相对较高。

关键词： Athabasca油砂沥青分子模拟重组分分子结构分子力学分子动力学超临界萃取分馏残渣

片层硅酸盐用于热固性PU/PLs复合可能性探讨

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光谱学与光谱分析 2005年第10期25卷 1606-1609页

作者：李再峰马仝马细柳 luba kotlyar 徐春明青岛科技大学化学与分子工程学院山东青岛266042 ICPET National Research Council Montreal RoadOttawaOntarioCanada K1 A 0 R6 石油大学重质油国家重点实验室北京102249

高岭土(Kaolinite)和蒙脱土(Montromollite)等粘土,被广泛用作添加剂来改善聚合物的耐热性能.文章用各种先进技术对高岭土与蒙脱土的形态、组成和结构进行表征比较.电子透射电镜及电子探针(TEM/EDX)结果显示高岭土较蒙脱土有较大的粒径... 详细信息

高岭土(Kaolinite)和蒙脱土(Montromollite)等粘土,被广泛用作添加剂来改善聚合物的耐热性能.文章用各种先进技术对高岭土与蒙脱土的形态、组成和结构进行表征比较.电子透射电镜及电子探针(TEM/EDX)结果显示高岭土较蒙脱土有较大的粒径和较小的硅铝比,TEM还显示出这些粘土是由片层粒子堆积而成.热重分析(TGA)的结果表明蒙脱土由于失去吸附水从60℃升温至90℃失重明显(约7%),而高岭土在此温度下几乎不失水.高岭土脱除结构羟基官能团脱水失重的温度大约在510℃,低于蒙脱土的670℃.室温下光声傅里叶变换(PAs-FTIR)红外光谱显示蒙脱土在羟基吸收区有较强的吸附水的吸收,1 650 cm-1处孤立的弱吸收谱带可给予左证.变温红外和TGA的结果显示,片层硅酸盐表面的结构羟基从100～500℃非常稳定,它可以和异氰酸酯基团(NCO)封端的预聚物反应形成热固性PU/PLs复合聚合物.

关键词：粘土表征 PU/PLs复合物

Non-viral causes of hepatocellular carcinoma

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World Journal of Gastroenterology 2010年第29期16卷 3603-3615页

作者： Wojciech Blonski David s.kotlyar Kimberly A Forde Division of Gastroenterology University of Pennsylvania Department of Gastroenterology Medical University Wroclaw Department of Internal Medicine Montefi ore Medical CenterAlbert Einstein College of Medicine

Hepatocellular carcinoma(HCC) is the most common primary liver malignancy and represents an international public health concern as one of the most deadly cancers *** main etiology of HCC is chronic infection with hepatitis B and hepatitis C ***,there are other important factors that contribute to the international burden of *** these are obesity,diabetes,non-alcoholic steatohepatitis and dietary *** evidence suggests that the etiology of many cases of HCC is in fact multifactorial,encompassing infectious etiologies,comorbid conditions and environmental *** of relevant non-viral causes of HCC will aid in preventative efforts to curb the rising incidence of this disease.

关键词： Hepatocellular carcinoma Etiology Nonalcoholic steatohepatitis Obesity Diabetes Alcohol Tobacco Oral contraceptive

Non-pulmonary allergic diseases and inflammatory bowel disease: A qualitative review

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World Journal of Gastroenterology 2014年第32期20卷 11023-11032页

作者： David s.kotlyar Mili shum Jennifer Hsieh Wojciech Blonski David A Greenwald Medical Oncology service NIH National Can-cer InstituteNational Institutes of Health Department of Medicine New York/Presbyterian Medical CenterNew YorkNY 10021 United States Division of Gastroenterology Department of Med-icineSUNY Stony BrookStony Brook Department of Medicine SUNY Upstate Binghamton Campus BinghamtonNY 13902 United States Medical University 53-111 Wroclaw Poland Division of Gastroenterology and Liver Dis-eases Department of MedicineMontefiore Medical Center Albert Einstein College of Medicine Bronx

While the etiological underpinnings of inflammatory bowel disease(IBD) are highly complex, it has been not-ed that both clinical and pathophysiological similarities exist between IBD and both asthma and non-pulmonary allergic phenomena. In this review, several key points on common biomarkers, pathophysiology, clinical manifesta-tions and nutritional and probiotic interventions for both IBD and non-pulmonary allergic diseases are *** and mast cell activity show common behav-iors in both IBD and in certain allergic disorders. IgE also represents a key immunoglobulin involved in both IBD and in certain allergic pathologies, though these links require further study. Probiotics remain a critically important intervention for both IBD subtypes as well as multiple allergic phenomena. Linked clinical phenomena, especially sinonasal disease and IBD, are discussed. In addition, nutritional interventions remain an underuti-lized and promising therapy for modification of both al-lergic disorders and IBD. Recommending new mothers breastfeed their infants, and increasing the duration of breastfeeding may also help prevent both IBD and al-lergic diseases, but requires more investigation. While much remains to be discovered, it is clear that non-pulmonary allergic phenomena are connected to IBD in a myriad number of ways and that the discovery of com-mon immunological pathways may usher in an era of vastly improved treatments for patients.

关键词： Inflammatory bowel disease Ulcerative colitis Crohn's disease Food intolerance Food allergies Biomarkers Pathophysiology Nutrition Probiotics

Biostratigraphy of a Paleocene-Eocene Foreland Basin boundary in southern Tibet

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Geoscience Frontiers 2010年第1期1卷 69-79页

作者： Xiaoqiao Wan Xi Wang luba F. Jansa China University of Geosciences 29 Xueyuan Road Beijing 100083 China Department of Earth sciences Dalhousie University Halifax N.S. Canada

This study of the Paleocene--Eocene boundary within a foreland basin of southern Tibet, which was dominated by a carbonate ramp depositional environment, documents more complex environmental conditions than can be derived from studies of the deep oceanic environment. Extinction rates for larger foraminiferal species in the Zongpu-1 section apply to up to 46% of the larger foraminiferal taxa. The extinction rate in southern Tibet is similar to rates elsewhere in the world, but it shows that the Paleocene fauna disappeared stepwise through the Late Paleocene, with Eocene taxa appearing abruptly above the boundary. A foraminifera turnover was identified between Members 3 and 4 of the Zongpu Formation-from the Miscellanea--Daviesina assemblage to an Orbitolites-Alveolina assemblage. The Paleocene and Eocene boundary is between the sBZ 4 and sBZ 5, where it is marked by the extinction of Miscellanea miscella and the first appearance of Alveolina ellipsodalis and a large number of Orbitolites. Chemostratigraphically, the δ^13C values from both the Zongpu-1 and Zongpu-2 sections show three negative excursions in the transitional strata, one in Late Paleocene, one at the boundary, and one in the early Eocene. The second negative excursion of δ^13C, which is located at the P-E boundary, coincides with larger foraminifera overturn. These faunal changes and the observed δ^13C negative excursions provide new evidence on environmental changes across the Paleocene--Eocene boundary in Tibet.

关键词： Paleocene Eocene Foraminifera Carbon stable isotope Tibet

Geological Evolution of the Longmenshan Intracontinental Composite Orogen and the Eastern Margin of the Tibetan Plateau

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Journal of Earth science 2013年第6期24卷 874-890页

作者：刘树根邓宾李智武 luba Jansa 刘顺王国芝孙玮 state Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Chengdu University of Technology Dalhousie University Halifax&Geological Survey of Canada-AtlanticDartmouthN.S.Canada

ABsTRACT： The Longmenshan Range is a tectonically composite intracontinental orogen. Its structure, deformation and spatial evolution reflect multiple kinematic eposides and variable dynamics especially during Post-Middle to Post-Late Triassic time. Field work, lower-temperature thermochronological data and U-Pb detrital zircon ages indicate document down-dip zonation and along-strike segmentation dem- onstrated by significant differences in geological structure, intensity of deformation and deformation- involved strata, uplift and cooling processes. Low-temperature thermochronology and U-Pb detrital zir- con ages reveal a period of tectono-thermal quiescence with slow uplift and cooling during post Early Norian to Rhaetian orogeny, followed by rapid cooling and uplift during the Late Cenozoic accompanied by coeval southeastward thrusting and southwestward propagation of defromation. The Longmenshan Range formed by s-N striking compression exerted by the Qinling orogen, E-W striking compression by the Tibetan Plateau and sE-striking compression by the Yangtze Plate. We propose a southwestward propagation model for the Longmenshan Range based our observations of zonation, segmentation and composite evolutional processes during the Late Triassic superimposed by development of the differen- tial uplift and cooling processes that shows southern segments of the Longmenshan Range during Post-Jurassic times.

关键词： tectonic zonality segmentation southwestward propagation intercontinental orogen,Longmenshan Tibetan Plateau.

Cretaceous Oceanic Red Beds:Distribution,Lithostratigraphy and Paleoenvironments

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Acta Geologica sinica(English Edition) 2007年第6期81卷 1070-1086页

作者： CHEN Xi WANG Chengshan HU Xiumian HUANG Yongjian WANG Pingkang luba JANsA ZENG Xuan state Key Laboratory of Geologtcal Processes and Mineral Resources Beijing 100083 China The school of Earth science and Resources of China University of Geosciences Beijing 100083 China Research Center for Tibetan Plateau Geology of China University of Geosciences Beijing 100083 China Department of Geology of Nanjing University Nanjing 210093 China Earth science Department Dalhousie University Halifax N.S. B2Y4A2 Canada Tianjin Branch of China National Offshore Oil Corporation Tianjing 300452 China

Cretaceous oceanic red beds （CORBs） represented by red shales and marls, were deposited during the Cretaceous and early Paleocene, predominantly in the Tethyan realm, in lower slope and abyssal basin environments. Detailed studies of CORBs are rare; therefore, we compiled CORBs data from deep sea ocean drilling cores and outcrops of Cretaceous rocks subaerially exposed in southern Europe, northwestern Germany, Asia and New Zealand. In the Tethyan realm, CORBs mainly consist of reddish or pink shales, limestones and marlstones. By contrast, marlstones and chalks are rare in deep-ocean drilling cores. Upper Cretaceous marine sediments in cores from the Atlantic Ocean are predominantly various shades of brown, reddish brown, yellowish brown and pale brown in color. A few red, pink, yellow and orange Cretaceous sediments are also present. The commonest age of CORBs is early Campanian to Maastrichtian, with the onset mostly of oxic deposition often after Oceanic Anoxic Events （OAEs）, during the early Aptian, late Albian-early Turonian and Campanian. This suggests an indicated and previously not recognized relationship between OAEs, black shales deposition and CORBs. CORBs even though globally distributed, are most common in the North Atlantic and Tethyan realms, in low to mid latitudes of the northern hemisphere; in the south Atlantic and Indian Ocean in the mid to high latitudes of the southern hemisphere; and are less frequent in the central Pacific Ocean. Their widespread occurrence during the late Cretaceous might have been the result of establishing a connection for deep oceanic current circulation between the Pacific and the evolving connection between south and North Atlantic and changes in oceanic basins ventilation.

关键词： Cretaceous pelagic Red Beds paleoenvironment paleogeography

Hydrothermal Dolomite in the Upper sinian (Upper Proterozoic) Dengying Formation, East sichuan Basin, China

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Acta Geologica sinica(English Edition) 2014年第5期88卷 1466-1487页

作者： LIU shugen HUANG Wenming JANsA luba F. WANG Guozhi sONG Guangyong ZHANG Changjun sUN Wei MA Wenxin state Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Chengdu University of Technology Geological Exploration & Development Research Institute CNPC Chuanqing Drilling Engineering Company Limited Geological survey of Canada-Atlantic Dartmouth. N.S. & Earth Science Department Dalhousie University Petrochina Hangzhou Research Institute of Geology

Hydrothermal Dolomite （HTD） is present in the Upper sinian （Upper Proterozoic） Dengying Formation, east sichuan Basin, China. The strata are comprised by primary dolomite. The HTD has various textures, including zebra dolomite, subhorizontal sheet-like cavities filled by saddle dolomite and breccias cemented by saddle dolomites as well occur as a fill of veins and fractures. Also co-occur MVT type lead-zinc ores in the study area. The δ13C and δ18O isotopes of HTD in the Upper sinian Dengying Formation are lighter than those of the host rocks, while sTsr/86sr is higher. The apparent difference in carbon, oxygen and strontium isotopes, especially the large difference in s7sr/s6sr isotopes ratio indicate crystallization from hot basinal and/or hydrothermal fluids. saddle dolomite was precipitated at temperatures of 270-320℃. The diagenetic parasequences of mineral assemblage deposited in the Dengying Formation are：（1） dolomite host rock →sphalerite-galena-barite-fluorite; （2） dolomite host rock →saddle dolomite →quartz; （3） dolomite host rock →saddle dolomite→bitumen; （4） dolomite host rock →saddle dolomite →barite. The mean chemical composition of the host dolomite matrix and HTD didn＇t change much during hydrothermal process. The fluids forming the HTDs in the Dengying Formation were mixtures of freshwater from the unconformity at the top of sinian, fluids from diagenetic compaction and hydrocarbon generation ＆ expulsion from the Lower Cambrian Niutitang Formation mudstones or the Doushantuo Formation silty mudstones, and hydrothermal fluids from the basement. The hydrocarbon reservoirs associated with the HTD were mostly controlled by the basement faults and fractures and karsting processes at the unconformity separating sinian and Cambrian strata. The hydrocarbon storage spaces of HTD included dissolved cavities and intercrystalline pores. Dissolution cavities are extensive at the top of Dengying Formation, up to about 46m below the unconformity between sinian an

关键词： Hydrothermal dolomite (HTD) Upper sinian series Dengying Formation sichuan basin