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珠江三角洲晚第四纪环境演变的微体生物记录

古脊椎动物学报 2007年第2期45卷 161-172页

作者：董艺辛刘春莲阴家润杨小强 franz T.fRSICH 高芳蕾中山大学地球科学系广州510275 中国地质大学地质系北京100083 德国维尔兹堡大学古生物研究所维尔兹堡97070

珠江三角洲是主要由西江、北江和东江在珠江口湾内堆积而成的复合三角洲,自晚更新世开始形成。微体生物是珠江河口三角洲晚第四纪沉积记录中的重要组分,是重建第四纪环境变化极为有效的指标。本文样品取自PD孔岩心,钻孔位于珠江三角洲中... 详细信息

珠江三角洲是主要由西江、北江和东江在珠江口湾内堆积而成的复合三角洲,自晚更新世开始形成。微体生物是珠江河口三角洲晚第四纪沉积记录中的重要组分,是重建第四纪环境变化极为有效的指标。本文样品取自PD孔岩心,钻孔位于珠江三角洲中部(113°28′35″E, 22°53′41″n),孔深16．7 m。代表约25 100年以来的沉积。PD孔中见有孔虫6属10种,其中以Ammonia beccani为优势种。根据地层分布特征,可识别3个有孔虫层位。介形类共7属9种,丰度较低,以Sinocytheridea impressa和neomonoceratina delicata为代表,在5个层位相对富集。根据微体生物分布特征,并结合有机碳、氮以及磁化率数据,PD孔晚第四纪沉积可划分为6个沉积环境阶段。A．三角洲前缘阶段(-16．7～-13．5 m;25 100～24 000 aB．P．):岩性为粗砂、砂至砂质粉砂。主要含Ammonia属的4个种(***、***．、***、***),丰度均较低,其中Ammonia beccarii为优势种。不见适应于正常浅海的Elphidium属。介形类以滨岸类型Sinocytheridea impressa为主。出现少量双壳类。代表河口附近水深10 m以内软泥底质、受河流影响大、水体动荡的半咸水环境。有机碳含量和磁化率较低,同样指示低海平面时期的沉积。B．河口湾阶段(-13．5～-10．6 m;24 000～22 400 aB．P．):岩性为粘土质粉砂至粘土。前一阶段出现的Ammonia 4个种的丰度比较高,且出现浅海底栖分子Elphidium advenum和***,以及浮游有孔虫分子Globigerinoides sp．。介形类出现Bicornucythere leizhouensis、***、Alocopocythere goujoni、Pistocythereis bradyformis等适应水深较大的分子,而滨岸浅水分子较少。有机碳含量和磁化率相对升高。代表海平面相对较高时期的沉积。C．三角洲平原阶段(-10．6～-9．2 m;22 400～21 700 aB．P．):底部为一薄层花斑状风化粘土,表明曾短期露出水面。向上变为富含有机质的深灰色粉沙质粘土。不含微体生物和双壳类,反映不稳定的环境条件。由于海平面降低,磁化率表现为持续低值。有机碳和C/n比值很高,表明有丰富的陆源有机质输入,海洋影响较小。D．陆地风化阶段(-9．2～-7．4 m;21 700～3 700 aB．P．):岩性为1．6 m厚的杂色粘土,不含任何生物化石,有机碳含量极低,是长期强烈风化作用的产物,对应于末次冰盛期。E．潮坪沉积阶段(-7．4～-2．5 m;3 700～2 600 aB．P．):互层状深灰色粉沙质粘土、灰色粉沙和细沙,含广盐性有孔虫Ammonia beccarii和Arenoparrella asiatica,以及少量介形类,如Sinocytheridea impressa。典型的半咸水双壳类Potamocorbula amurensis较为丰富,另外还见藤壶和虫管碎片,指示盐度频繁波动的潮间带环境。f．上三角洲平原阶段(2 600 aB．P．以来):未见任何有孔虫和双壳类,顶部见少量陆相介形类Cypria yanchengensis,磁化率变化频繁,C/n比值较高,表明陆相影响不断增强,且环境条件不稳定。研究区晚第四纪古环境的演化是由海平面升降变化控制的。上述沉积环境变化序列表现出两次海进一海退旋回,分别对应阶段A至阶段D和阶段E至阶段f,相应于晚更新世和全新世的两次海平面上升事件。

关键词：珠江三角洲晚第四纪有孔虫介形类环境演化

PREPARATIOn Of SILICA MOLECULAR SIEVE MEMBRAnE fOR HYDROGEn SEPARATIOn

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Acta Metallurgica Sinica(English Letters) 1999年第5期12卷 1077-1081页

作者： B.Q. Jiang, L. Gu,W.L. Zhang,Y.S. Sun and f. Lin Chemical Engineering Department of nanchang University, nanchang 330029, China

A ceramic tube supported γ alumina silica inorganic composite membrane was made by modifying a ceramic tube supported γ alumina film with a silica sol using sol gel method. The thickness of the silica thin.f.lm was 750? and the pore diameter was less than 5?.The prepared silica molecular sieve membrane displayed a high hydrogen permeability and high selectivities of H 2/n 2 and H 2/CO 2 gas mixtures. This composite membrane can be used to separate high purity hydrogen of more than 99 5% from various kinds of industrial waste gas mixtures containing hydrogen.

关键词： silica ceramic membrane inorganic composite membrane sol gel

血浆游离DnA水平增高可作为预测重型颅脑损伤患者死亡率的独立指标(英文)

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中华神经外科疾病研究杂志 2014年第3期13卷 258-258页

作者： Rodrigues filho EM1 Simon D Ikuta n Klovan C Dannebrock f de Oliveira CO Regner A 1ULBRA Laboratório de Biomarcadores do TraumaCanoasRSBrazil

Trauma is the leading cause of death under 45 years worldwide and up to 50% of trauma fatalities are due to brain *** of outcome is one of the major problems associated with severe TBI and research efforts have focused on the investigation of biomarkers with prognostic value following TBI. Therefore,our aim was to investigate whether cell-free DnA concentrations correlated to short-term primary outcome( survivor or death) and GCS scores following severe TBI. A total of 188 victims of severe TBI were enrolled in this prospective study,outcome variables comprised: survival and neurological assessment using the GCS at ICU discharge. Control blood samples were obtained from 25 healthy volunteers. Peripheral venous blood was collected at admission in the ICU. Plasma DnA was measured using a real-time quantitative PCR assay for the β-globin gene. There was correlation between higher DnA levels and both fatal outcome and lower hospital admission GCS scores. Plasma DnA concentrations at the chosen cut- off point( ≥171,381 kilogenomesequivalents /L) predicted mortality with a specificity of 90% and a sensitivity of 43%. Logistic regression analysis showed that elevated plasma DnA levels were independently associated with death( P n conclusion,high cell-free DnA concentration was a predictor of short-term mortality following severe TBI.

关键词：神经外科学疾病临床研究症状

GREEn SYnTHESIS Of PHOSPHORAMIDES BY TRIMETAPHOSPHATE(P3m)

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GREEN SYNTHESIS OF PHOSPHORAMIDES BY TRIMETAPHOSPHATE(P3m)

STUDY On PREPARATIOn Of SUPPORTED ALUMInA MEMBRAnE USInG SOL- GEL METHOD

第17届国际磷化学大会

作者： nI, f. fu, C. Sun, S. T. Zhao, Y. f Key Lab of Chemical Biology of fujian Province, Department of Chemistry, Xiamen University Xiamen, 361005, China

＜正＞A green synthesis method with organic reagent free and efficient purificaiton procedure was developed to synthesize the phosphoramides, such as n-phosphoryl amino acids and n-phosphoryl

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Acta Metallurgica Sinica(English Letters) 1999年第5期12卷 1082-1085页

作者： W.L. Zhang, B.Q. Jiang, Y.S. Sun, f. Lin and L. Gu Chemical Engineering Department of nanchang University, nanchang 330029, China

A stable colloidal boehmite sol was made with the aluminium iso propoxide made in China and used to prepare the supported γ alumina membrane using sol gel method. The γ alumina thin layer was characterized by SEM, n 2 sorption method and permeation measurement. The γ alumina membrane was prepared with un.f.rm surface, thickness of 3 μm and average diameter of about 5 nm. The permeabilities of the single gases of H 2, n 2, Ar and their separation.f.ctors were measured. The experimental data explained a behavior of Knudsen diffusion.f.r the gas transport through the thin membrane.

关键词： boehmite sol gel method,γ alumina membrane permeability

Serum cytokine profile in patients with hepatitis B e antigen-negative chronic active hepatitis B and inactive hepatitis B virus carriers

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World Journal of Gastrointestinal Pathophysiology 2013年第1期4卷 24-27页

作者： Dimitra Dimitropoulou Marina Karakantza Georgios L Theodorou Lydia Leonidou Stelios f Assimakopoulos Athanasia Mouzaki Charalambos A Gogos Department of Internal Medicine University Hospital of Patras26504 PatrasGreece Division of Hematology Department of InternalMedicineUniversity Hospital of Patras26504 PatrasGreece

An insufficient cellular immune response seems to be critical for the immunopathogenesis of chronic hepatitis B virus *** have previously demonstrated no differences of T-lymphocyte subsets in blood between inactive hepatitis B s antigen(HBsAg) carriers and patients with HBeAg-negative chronic active hepatitis *** study investigated the peripheral blood cytokine profile in patients with HBeAg-negative chronic active hepatitis B infection(Group A,n = 21) and inactive HBsAg carriers(Group B,n = 13).Serum cytokines [interferon(Ifn)-γ,tumor necrosis factor-α,interleukin(IL)-1b,IL-4,IL-12,IL-10,IL-2,IL-5,IL-8] were analyzed by using flow *** with chronic active disease presented with sign.f.cantly decreased levels of Ifn-γ and IL-10 compared to inac-tive carriers(P = 0.048 and P = 0.008,respectively).In HBeAg-negative chronic active hepatitis B patients,a sign.f.cant negative correlation of Ifn-γ levels with serum hepatitis B viral load was noted(P = 0.021).In conclusion,patients with HBeAg-negative chronic active hepatitis B and HBsAg inactive carriers display a different cytokine *** Th1 response observed in patients with chronic active hepatitis B could be implicated in the persistence of virus replication and ongoing progression of liver disease.

关键词： Cytokines Hepatitis B flow cytometry Immunoreactive fibronectin-γ

Efficient photocatalytic destruction of recalcitrant micropollutants using graphitic carbon nitride under simulated sunlight irradiation

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Environmental Science and Ecotechnology 2021年第1期5卷 30-40页

作者： Jiexi Zhong Hui Jiang Zhiliang Wang Zhigang Yu Lianzhou Wang Jochen.f.Mueller Jianhua Guo Advanced Water Management Centre The University of QueenslandSt.LuciaBrisbaneQLD4072Australia Queensland Alliance for Environmental Health Sciences The University of QueenslandWoolloongabbaQLD4102Australia nanomaterials Centre School of Chemical Engineering and Australian Institute for Bioengineering and Nanotechnology(AIBN)The University of QueenslandSt LuciaQLD4072Australia

The ubiquity of micropollutants(MPs)in aquatic environments has attracted increasing concern.f.r public health and ecological *** to conventional biological treatment,photocatalytic processes show more efficiency in degrading MPs,but they require expensive materials and complicated synthesis *** study developed an economic photocatalytic process to degrade *** synthesized urea-based graphitic carbon nitride(g-C_(3)n_(4))by a facile one-step pyrolysis method and evaluated the photocatalytic efficiency of carbamazepine(CBZ).Under simulated solar irradiation,g-C_(3)n_(4) could achieve 100% removal efficiency of 0.1 mg/L CBZ in spiked wastewater effluent within 15 min,and 86.5% removal efficiency in wastewater influent after 20 min of *** porous structure of g-C_(3)n_(4) promoted effective charge separation and mass transport of CBZ near the catalyst surface,enabling a high kinetic rate(0.3662 min^(-1)).Reactive oxygen species trapping experiments revealed that superoxide radicals(O_(2)^(·-))and holes(h^(+))were the major active *** paramagnetic resonance(EPR)further confirmed the presence of O_(2)^(·-),·OH,^(1)O_(2) and *** pH,light intensity and initial CBZ concentration were found to have sign.f.cant impacts on the removal efficiency of *** reaction intermediates were identified and the degradation pathway was *** MPs were selected to further demonstrate photocatalytic efficiency of g-C_(3)n_(4).The facile synthesis,superior efficiency,and versatility of g-C_(3)n_(4) make it a promising catalyst for application in tertiary wastewater treatment processes.

关键词： Graphitic carbon nitride(g-C_(3)n_(4)) Photocatalysis Micropollutants Reactive oxygen species(ROS) Advanced oxidation processes(AOPs)

一项有关慢性心肾综合征病理生理学的磁共振成像研究

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国际医学放射学杂志 2015年第4期 403-403页

作者： T.Breidthardt E.f.Cox I.Squire A.Odudu n.f.Omar M.T.Eldehni 麻智慧 Department of Renal Medicine Royal Derby Hospita

摘要目的研究慢性心力衰竭(Hf)病人的肾功能与肾灌注及肾实质结构(T1弛豫)间的关系。方法经过伦理委员会(IRB)批准,根据Hf和肾功能的状态入组40名参与者

关键词：心肾综合征磁共振成像病理生理学慢性心力衰竭伦理委员会肾功能弛豫肾实质肾皮质负相关

PET/CT with 18f-PSMA in Patients with Prostate Cancer, Review of the Initial Experience

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