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In situ stabilization of arsenic in soil with organoclay,organozeolite,birnessite,goethite and lanthanum-doped magnetic biochar

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Pedosphere 2022年第5期32卷 764-776页

作者： Saeed BAGHERIFAM Trevor c.BROWN christopher M.FELLOWS Ravi NAIDU Sridhar KOMARNENI chemistry-School of Science and Technology University of New EnglandArmidale NSW 2351(Australia) Global centre for Environmental Remediation Faculty of Science and Information TechnologyUniversity of NewcastleUniversity DriveCallaghan NSW 2308(Australia) Department of Ecosystem Science and Management and Materials Research Institute 204 Energy and the Environment LaboratoryPennsylvania State UniversityUniversity Park PA 16802(USA)

Arsenic(As)is a known carcinogen and naturally occurring semi-metal in soils and in the Earth's *** of soils and water with As poses a serious threat to millions of people worldwide due to its health hazards and toxicological ***,devising novel and efficient methods for remediation of contaminated areas has attracted a great deal of interest across the *** this study,we investigated the usefulness of synthetic birnessite,goethite,hexadecylpyridinium chloride-modified montmorillonite(HDPc-M),hexadecylpyridinium bromide-modified zeolite(HDPB-Z),and lanthanum(La)-doped magnetic biochar produced from eucalyptus bark(La-Euchar)as adsorbents at 10%dosage for As stabilization in a soil spiked with 1000 mg kg^(-1)*** effectiveness of the above adsorbents in As immobilization in soil was assessed using single-step extractions with 2 mol L^(-1)HNO_(3)and deionized water,the simplified bioaccessibility extraction test(SBET)method,and sequential extraction with the modified community Bureau of Reference(BcR)*** of the adsorbents shifted the exchangeable fraction of As to more recalcitrant fractions and dramatically reduced the exchangeable fraction by 6%-99%and the extractable amounts with HNO_(3),deionized water,and SBET method by 30%-92%,17%-95%,and 12%-90%,respectively,compared to the unamended *** immobilizing effects of adsorbents on As decreased in the sequence of birnessite>La-Euchar>goethite>HDPB-Z>*** exhibited great affinity for As and drastically reduced As extractability by more than 90%in all single *** results revealed that HDPc-M,HDPB-Z,La-Euchar,birnessite,and goethite are promising immobilizing agents for in situ stabilization of As in terrestrial environments.

关键词： adsorbent bioaccessibility bioavailability environmental contamination immobilizing agent modified biochar modified clay remediation technique

The Long Road to Understanding the Baculovirus P10 Protein

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Virologica Sinica 2009年第4期24卷 227-242页

作者： David c. J. carpentier Linda A. King School of Life Sciences Oxford Brookes University Headington Campus Oxford United Kingdom Oxford Expression Technologies Ltd Oxford Brookes University Headington Campus Oxford United Kingdom

The baculovirus P 10 protein has always represented a mystery in the field of insect virology. Like the baculovirus polyhedrin protein it is expressed at high levels very late in infection. Homologues of the Autographa californica nucleopolyhedrovirus p10 gene are conserved in all Alphabaculoviruses and in other viruses of lepidopteran hosts yet is completely dispensable for virus replication and transmission. PIO is a microtubule interacting protein whose expression has been associated with the formation of a variety of complex and extensive cytoplasmic and nuclear structures. PIO has been associated with a number of roles during infection ranging from the formation of virus occlusion bodies, to affecting the rate of cellular and/or nuclear lysis during the final stages of the virus replication cycle. In this article we review recent work aimed at understanding the role of this enigmatic protein, putting them into context with recent advances in understanding of protein structure and function. We look back at a number of historical studies and observations, reanalysing their conclusions based on recent data and our own observations. The role of the P 10 protein during baculovirus replication remains elusive, however, novel avenues of investigation have been identified that will, we are sure, eventually lead to an understanding of this protein.

关键词： Baculovirus P10 microtubule Polyhedral occlusion body Fibrous body/fibrillar structure

Isotopic Ages of the Penglai Group in the Jiaobei Belt and Their Geotectonic Implications

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Acta Geologica Sinica(English Edition) 1994年第4期68卷 417-433页

作者： W.R.Fitches c.J.N.Fletcher Institute of Earth Studies University College of WalesAberystwythSY23 3D B U KBritish Geological SurveyAberystwythSY 23 4BYU K

The Penglai Group in the Jiaobei Belt is the only remaining cover of the Archaean to Early Proterozoic crystalline basement in eastern Shandong. The ages of deposition of the Penglai Group and of its deformation and metamorphism have long been a subject of speculation. Whole-rock Rb-Sr ages, illite-whole-rock pair Rb-Sr ages and illite K-Ar ages recently obtained from the Penglai Group slates are reported and interpreted in this paper. On the basis of structural and metamorphic studies coupled with analyses of illite crystallinity, XRD and SEM , a whole-rock age of 473±32 Ma (Ordovician) is interpreted as the time of termination of burial metamorphism experienced by the Penglai Group. Therefore, the age of the Penghai Group is older than Ordovician. The first-phase folding and syntectonic low greenschist facies metamorphism in the Penglai Group, i.e. the Penglai Movement, took place before 299±4 Ma B.P., i.e in the Late carboniferous. The Penglai Movement that occurred in the Jiaobei Belt on the southern margin of the North china Plate is attributed to collision between the North china and Yangtze plates along the Jiaonan collision Belt. This demonstrates that the continent-continent collision between the North china and Yangtze plates east of the Tan-Lu Fault Zone took place in the Late carboniferous. The collision caused N-S compression and deformation in the southern margin belt of the North china Plate north of the Qinling-Dabieshan-Jiaonan collision Belt.

关键词： illite age Jiaobei Belt North china Plate Yangtze Plate plate collision

clustering-based label estimation for network anomaly detection

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Digital communications and Networks 2021年第1期7卷 37-44页

作者： Sunhee Baek Donghwoon Kwon Sang c.Suh Hyunjoo Kim Ikkyun Kim Jinoh Kim computer Science Department Texas A&M UniversityCommerceTX75429USA ETRI 218 Gajeong-roYuseong guDaejeon34129Republic of Korea

A substantial body of work has been done to identify network anomalies using supervised and unsupervised learning techniques with their unique strengths and *** this work,we propose a new approach that takes advantage of both worlds of unsupervised and supervised *** main objective of the proposed approach is to enable supervised anomaly detection without the provision of the associated labels by *** this end,we estimate the labels of each connection in the training phase using ***“estimated”labels are then utilized to establish a supervised learning model for the subsequent classification of connections in the testing *** set up a new property that defines anomalies in the context of network anomaly detection to improve the quality of estimated *** our extensive experiments with a public dataset(NSL-KDD),we will prove that the proposed method can achieve performance comparable to one with the “original”labels provided in the *** also introduce two heuristic functions that minimize the impact of the randomness of clustering to improve the overall quality of the estimated labels.

关键词： Label estimation Network anomaly detection clustering randomness

Discovery　of　spawning　site　of　Japanese　eel　Anguilla　japonica　for　first　time　by　chinain　waters　adjace

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Acta Oceanologica Sinica 1998年第1期17卷 113-119页

作者： Baoling W. Shiqun c. Fan M. First Institute of Oceanography State Oceanic Administration Qingdao 266003 China

ＤｉｓｃｏｖｅｒｙｏｆｓｐａｗｎｉｎｇｓｉｔｅｏｆＪａｐａｎｅｓｅｅｅｌＡｎｇｕｉｌｌａｊａｐｏｎｉｃａｆｏｒｆｉｒｓｔｔｉｍｅｂｙＣｈｉｎａｉｎｗａｔｅｒｓａｄｊａｃｅｎｔｔｏＮｏｒｔｈＥｑｕａｔｏｒｉａｌＣｕｒｒ... 详细信息

ＤｉｓｃｏｖｅｒｙｏｆｓｐａｗｎｉｎｇｓｉｔｅｏｆＪａｐａｎｅｓｅｅｅｌＡｎｇｕｉｌｌａｊａｐｏｎｉｃａｆｏｒｆｉｒｓｔｔｉｍｅｂｙＣｈｉｎａｉｎｗａｔｅｒｓａｄｊａｃｅｎｔｔｏＮｏｒｔｈＥｑｕａｔｏｒｉａｌＣｕｒｒｅｎｔＷｕＢａｏｌｉｎｇ，Ｃｈｅｎ...

关键词： time first chinain

ON THE ROLE OF SULFATE ION IN THE ATMOSPHERE

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Acta meteorologica Sinica 1994年第4期8卷 498-504页

作者： J.Rosinski c.T.Nagamoto National center for Atmospheric Research National Oceanic and Atmospheric Administration

Drop freezing experiments with ammonium sulfate water solutions have shown the existence of the temperature maxima that are a function of the salt *** maxima were:-12℃ for 10-4 M solution on filter,-9℃ for 10^(-4) to 10^(-3)M solution in contact with particles of continental origin,and -4℃ for 10^(-4) M solution in contact with particles of marine origin. It was speculated that the presence of ice-forming nuclei active at high temperature (-4℃) should extend the for- mation of ice in clouds toward lower latitudes,increase their albedos,and provide additional cooling during daytime for the *** microphysics of clouds must be included in studying climate.

关键词： drop freezing ammonium sulfate solution concentration freezing temperature climate studies

Al/GaSb contact with Slow Positron Beam

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chinese Journal of chemical Physics 2006年第2期19卷 169-172页

作者：王海云翁惠民 c.c.Ling 叶邦角周先意中国科学技术大学近代物理系合肥230026 香港大学物理系

Annealing study of the Al/GaSb system was performed by using a slow positron beam and the measurement of X-ray diffraction. The S parameter against positron energy data were fitted by a three layer model （Al/interface/GaSb）. It was found there was a ～5 nm interfacial at the region between the Al layer and bulk in the sample of as-deposited. After the 400 ℃ annealing, this interfacial region extends to over 40 nm and S parameter dramatically drops. This is possibly due to a new phase formation induced by the atoms＇inter-diffusion at the interface. The annealing out of the open volume defects in the Al layer was revealed by the decrease of the S parameter and the increase of the effective diffusion length of the Al layer. Annealing behaviors of Sb and Lb of the GaSb bulk showed the annealing out of positron traps at 250 ℃. However,further annealing at 400 ℃ induces formation of positron traps, which are possibly another kind of VGarelated defect and the positron shallow trap GaSb anti-site. The results of the X-ray diffraction experiment verified the conclusion of obtained by using positron technology.

关键词： Positron Defect Trapping Al/GaSb Interface

current role of palliative interventions in advanced pancreatic cancer

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World Journal of Gastrointestinal Surgery 2018年第7期10卷 75-83页

作者： chelsey c ciambella Rachel E Beard Thomas J Miner Department of Surgical Oncology Warren Alpert Medical School Brown University

Pancreatic adenocarcinoma is the third leading cause of cancer death in the United States. Unfortunately, at diagnosis, most patients are not candidates for curative resection. Surgical palliation, a procedure performed with the intention of relieving symptoms or improving quality of life, comes to the forefront of management. This article reviews the palliative management of unresectable pancreatic cancer, including obstructive jaundice, duodenal obstruction and pain control with celiac plexus block. Although surgical bypasses for both biliary and duodenal obstructions usually achieve good technical success, they result in considerable perioperative morbidity and mortality, even when performed laparoscopically. The effectiveness of selfexpanding metal stents for biliary drainage is excellent with low morbidity. Surgical gastrojejunostomy for duodenal obstruction appears to be best for patients with a life expectancy of greater than 2 mo while endoscopic stenting has been shown to be feasible with good symptom relief in those with a shorter life expectancy. Regardless of the palliative procedure performed, all physicians involved must be adequately trained in end of life management to ensure the best possible care for patients.

关键词： Surgical palliation Duodenal obstruction Hepatojejunostomy Gastrojejunostomy Endoscopic stenting Malignant ascites celiac block Palliative triangle Pancreatic cancer Obstructive jaundice

A New Fossil Termite (Isoptera,Stolotermitidae,Stolotermes) from the Early Miocene of Otago,New Zealand

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Acta Geologica Sinica(English Edition) 2010年第4期84卷 705-709页

作者： Uwe KAULFUSS Anthony c.HARRIS Daphne E.LEE Department of Geology University of OtagoPO Box 56Dunedin 9054New Zealand Otago Museum PO Box 6202Dunedin 9059New Zealand

The forewing of a termite from Early Miocene lake sediments in Otago, southern New Zealand is figured and described. It exhibits the generic characters of the damp-wood termite Stolotermes Hagen, but differs from forewings of the known species in size and venation pattern and is described as Stolotermes kupe sp. nov. S. kupe represents the first confident record of fossil Stolotermitidae and extends the fossil record of the family back to the Early Miocene. It also is the first direct evidence of fossil Isoptera from New Zealand, though silicified termite faecal pellets, referable to Kalotermes brauni, have been previously described. S. kupe indicates that Stolotermitidae has been present in the Australasian region since at least the Early Miocene.

关键词： Early Miocene fossil termite Isoptera Stolotermes new species Otago Fouiden Maar Gondwana