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Efects of solution chemistry on arsenic(V) removal by low-cost adsorbents

Journal of Environmental Sciences 2013年第11期25卷 2291-2298页

作者： Yuru Wang daniel c.W.Tsang Department of civil and Environmental Engineering Hong Kong Polytechnic University Department of civil and Natural Resources Engineering University of Canterbury

Natural and anthropogenic arsenic （As） contamination of water sources pose serious health concerns, especially for small communities in rural areas. This study assessed the applicability of three industrial byproducts （coal fly ash, lignite, and green waste compost） as the low-cost adsorbents for As（V） removal under various field-relevant conditions （dissolved oxygen, As（V）/Fe ratio, solution pH, and presence of competing species）. The physico-chemical properties of the adsorbents were characterized by XRD, XRF, FT-IR, and NMR analysis. Batch experiments demonstrated that coal fly ash could provide effective As（V） removal （82.1%-95%） because it contained high content of amorphous iron/aluminium hydroxides for As（V） adsorption and dissolvable calcium minerals for calcium arsenate precipitation. However, the addition of lignite and green waste compost was found unfavourable since they hindered the As（V） removal by 10%-42% possibly due to dissolution of organic matter and ternary arsenate-iron-organic matter complexes. On the other hand, higher concentrations of dissolved iron （comparing As（V）/Fe ratios of 1：1 and 1：10） and dissolved oxygen （comparing 0.2 and 6 mg/L） only marginally enhanced the As（V） removal at pH 6 and 8. Thus, addition of dissolved iron, water aeration, or pH adjustment became unnecessary because coal fly ash was able to provide effective As（V） removal under the natural range of geochemical conditions. Moreover, the presence of low levels of background competing （0.8 or 8 mg/L of humic acid, phosphate, and silicate） imposed little influence on As（V） removal, possibly because the high adsorption capacity of coal fly ash was far from exhaustion. These results suggested that coal fly ash was a potentially promising adsorbent that warranted further investigation.

关键词： adsorption arsenic coal fly ash green waste compost lignite

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What’s new in inflammatory bowel disease in 2008?

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World Journal of Gastroenterology 2008年第3期14卷 329-330页

作者： daniel c Baumgart Department of Medicine Division of Gastroenterology and Hepatology Charité Medical Center-Virchow Hospital Medical School of the Humboldt-University of Berlin D-13353 Berlin Germany

Ulcerative colitis and crohn’s disease represent the two major forms of inflammatory bowel disease. In this highlight topic series of articles we cover the latest developments in genetics and epidemiology, intestinal physiology, mucosal immunology, mechanisms of epithelial cell injury and restitution, current medical therapy, modern surgical management, important extra- intestinal complications such as primary sclerosing cholangitis, cholangiocellular carcinoma and autoimmune hepatitis as well as endoscopic and molecular screening, detection and prevention of small bowel and colorectal cancer.

关键词： Gastroenterology

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Metallurgical Microstructure complexity in the Electron Beam Welding (EBW) Joint of Ti6246

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Journal of Minerals and Materials characterization and Engineering 2024年第2期12卷 100-111页

作者： daniel Moreno Yohanan Nachmana Roei Saraga Tal Rokah Denis Panchenco Michael Mansano Elinor Itzhaky Moshe Shapira Beth Shemesh Engines LTD FAA & EASA Beth Shemesh Israel

Electron Beam Welding (EBW) is employed to both melt and unite materials, influencing their thermal history and subsequently determining the microstructure and properties of the welded joint. Welding Titanium alloys involves undergoing local melting and rapid solidification, subjecting the material to thermal stresses induced by a thermal expansion coefficient of 9.5 × 10 m/m°c. This process, reaching range temperatures from the full melting alloy to room temperature, results in phase formation dictated by the thermodynamic preferences of the alloyed elements, posing a significant challenge. Recent efforts in simulation and calculations have been undertaken elsewhere to address this challenge. This study focuses on a joint of two plates with differing cross-sectional areas, influencing heat transfer during welding. This report presents a case study focusing on the metallurgical changes observed in the microstructure within the welded zone, emphasizing alterations in the cooling rate of the welded joint. The investigation utilizes optical metallography, Vickers’s Hardness testing, and SEM (scanning electron microscopy) to comprehensively characterize the observed changes in addition to heat transfer simulation of the welded zone.

关键词： Ti Alloys Welding Phase Formation Hardness Metallography

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Dehydrated Natural Feed for cats: Influence on Apparent Digestibility coefficient, Feces Scores, and Serum Immune, Antioxidant, and Metabolic Biomarkers

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Food and Nutrition Sciences 2024年第7期15卷 594-611页

作者： Bruno Giorgio de Oliveira cécere Guilherme Luiz Deolindo Bianca F. Bissacotti Priscila Marquezin copetti Maria Rosa chitolina Schetinger Bruna Klein Matheus Delamea Baldissera Thiago Pereira Ribeiro Walter Hugo cuelho Suarez daniel Pigatto Monteiro Aleksandro Schafer Da Silva Graduate Multicenter Program in Biochemistry and Molecular Biology University of the State of Santa Catarina Lages Brazil Department of Biochemistry and Molecular Biology Universidade Federal de Santa Maria (UFSM) Santa Maria Brazil Department of Animal Science Universidade Federal de Santa Maria (UFSM) Chapec Brazil Department of Health Science Universidade Franciscana (UFN) Santa Maria Brazil Department of Animal Nutrition Tectron-Tecnologia e Inovao Toledo Brazil

The present study aimed to determine whether natural dehydrated feed (DNF) can replace dry extruded feed while preserving the required daily intake, nutrient digestibility and benefits for immunity and antioxidant response in cats. The animals were divided into two groups of seven animals each. One group received DNF, and the other consumed commercial extruded dry feed (DcF). The experiment lasted 45 days and we measured daily consumption and collected blood and feces samples. The animals in the DNF group showed greater digestibility of fiber and mineral matter than DcF. cats in the DNF group had a higher volume of feces. DNF cats had lower leukocyte and granulocyte counts and cholesterol levels. Serum enzymatic antioxidant responses and non-enzymatic were higher in DNF cats. cats in the DNF group showed lower serum acute phase proteins in addition to a tendency toward a higher concentration of transferrin than in the DcF group. Fecal Escherichia coli and total coliform counts of cats fed DNF were higher than DcF. We conclude that the daily consumption of cats is adequate. This feed had greater digestibility of fiber and mineral matter, in addition to an improvement in antioxidant and immunological responses.

关键词： Alternative Feed Antioxidant companion Animals Health

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Impact of vasculature damage on the outcome of spinal cord injury:a novel collagenase-induced model may give new insights into the mechanisms involved

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Neural Regeneration Research 2014年第20期9卷 1783-1786页

作者： Patrick Losey daniel c.Anthony Experimental Neuropathology Department of PharmacologyUniversity of OxfordOxfordUK

The deleterious effect of vasculature damage on the outcome of spinal cord injury has long been recognized, and numerous clinical studies have shown that the presence of hemorrhage into the spinal cord is directly associated with a poorer neurological outcome. Vascular damage leads to de- creased blood flow to the cord and the release of potentially toxic blood-borne components. Here we consider the mechanisms that may be contributing to hemorrhage-induced damage and discuss the utility of a new model of spinal cord hemorrhage, which was urgently required as most of our current understanding has been extrapolated from intracerebral hemorrhage studies.

关键词： spinal cord injury vasculature hemorrhage animal model collagenase stereotaxic microinjection

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嗜铬细胞瘤和副神经节瘤的系统性放射性药物治疗

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中华核医学与分子影像杂志 2024年第3期44卷 187-192页

作者：席闯(译) 罗全勇(审校) 上海交通大学医学院附属第六人民医院上海200233

良性嗜铬细胞瘤和副神经节瘤通常可以通过手术切除治愈,但转移性疾病的治疗在疾病控制和症状控制方面都存在挑战。幸运的是,有几种治疗方式可用于转移性疾病的治疗,包括化疗、放射治疗和外科手术。放射性核素标记的间碘苄胍(MIBG)和生... 详细信息

良性嗜铬细胞瘤和副神经节瘤通常可以通过手术切除治愈,但转移性疾病的治疗在疾病控制和症状控制方面都存在挑战。幸运的是,有几种治疗方式可用于转移性疾病的治疗,包括化疗、放射治疗和外科手术。放射性核素标记的间碘苄胍(MIBG)和生长抑素受体显像为将这些放射性药物用作诊疗剂奠定了基础。^(131)I-MIBG治疗神经内分泌肿瘤历史悠久,美国食品与药品监督管理局最近批准将高比活度^(131)I-MIBG用于治疗转移性或不可手术的嗜铬细胞瘤或副神经节瘤,使^(131)I-MIBG的治疗应用更加广泛,并重新引起人们的兴趣。尽管已有文献报道使用90Y-或177Lu-1,4,7,10-四氮杂环十二烷-1,4,7,10-四乙酸(DOTA)偶联的生长抑素类似物对嗜铬细胞瘤和副神经节瘤进行多肽受体放射性核素治疗,但随着177Lu-DOTA-D-苯丙氨酸1-酪氨酸3-苏氨酸8-奥曲肽(DOTATATE)在美国和欧洲获批,以及美国国家综合癌症网络指南建议将其用于转移性或不可手术的嗜铬细胞瘤和副神经节瘤患者,这些药物引起了人们新的兴趣。已有证据表明这些放射性药物是对转移性或无法手术的嗜铬细胞瘤或副神经节瘤患者有效的姑息治疗方法。在该篇继续医学教育文章中,作者讨论了使用^(131)I-MIBG和90Y-或177Lu-DOTA生长抑素类似物治疗嗜铬细胞瘤和副神经节瘤。

关键词：嗜铬细胞瘤副神经节瘤生长抑素 MIBG DOATATE 多肽受体放射性核素治疗

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Evolving treatment strategies for colorectal cancer: A critical review of current therapeutic options

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World Journal of Gastroenterology 2014年第4期20卷 877-887页

作者： daniel c Damin Anderson R Lazzaron Division of coloproctology Department of Surgery Hospital de Clinicas de Porto Alegre Federal University of Rio Grande do Sul Postgraduate Program in Surgery Federal University of Rio Grande do Sul

Management of rectal cancer has markedly evolved over the last two *** technologies of staging have allowed a more precise definition of tumor *** in surgical concepts and techniques have resulted in higher rates of sphincter preservation and better functional outcome for patients with this ***,preoperative chemoradiotherapy followed by total mesorectal excision has become the standard of care for locally advanced tumors,many controversial matters in management of rectal cancer still need to be *** include the feasibility of a non-surgical approach after a favorable response to neoadjuvant therapy,the ideal margins of surgical resection for sphincter preservation and the adequacy of minimally invasive techniques of tumor *** this article,after an extensive search in PubMed and Embase databases,we critically review the current strategies and the most debatable matters in treatment of rectal cancer.

关键词： Rectal cancer colorectal cancer Staging Sphincter preservation Neoadjuvant chemo-radiotherapy Surgery

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Manipulating the Interferon Signaling Pathway: Implications for HIV Infection

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Virologica Sinica 2019年第2期34卷 192-196页

作者： Krystelle Nganou-Makamdop daniel c. Douek Institute of clinical and Molecular Virology University Hospital Erlangen Erlangen 91054 Germany Human Immunology Section Vaccine Research Center National Institute of Allergy and Infectious Disease National Institutes of Health BethesdaMD 20892 USA

During human immunodeficiency virus(HIV) infection, type I interferon(IFN-I) signaling induces an antiviral state that includes the production of restriction factors that inhibit virus replication, thereby limiting the infection. As seen in other viral infections, type I IFN can also increase systemic immune activation which, in HIV disease, is one of the strongest predictors of disease progression to acquired immune deficiency syndrome(AIDS) and non-AIDS morbidity and ***, IFN-I is associated with cD4 T cell depletion and attenuation of antigen-specific T cell responses. Therefore,therapeutic manipulation of IFN-I signaling to improve HIV disease outcome is a source of much interest and debate in thefield. Recent studies have highlighted the importance of timing(acute vs. chronic infection) and have suggested that specific targeting of type I IFNs and their subtypes may help harness the beneficial roles of the IFN-I system while avoiding its deleterious activities.

关键词： Human immunodeficiency virus(HIV) Simian immunodeficiency virus(SIV) Type I interferon(IFN-I) Inflammation

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Behavior and physiology of mechanoreception: separating signal and noise

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Integrative Zoology 2009年第1期4卷 3-12页

作者： John c.MONTGOMERY Shane WINDSOR daniel BASSETT Leigh Marine Laboratory University of AucklandAucklandNew Zealand

The mechanosensory lateral line is found in all aquatic fish and *** provides a highly sensitive and versatile hydrodynamic sense that is used in a wide range of *** stimuli of biological interest originate from both abiotic and biotic sources,and include water currents,turbulence and the water disturbances caused by other animals,such as prey,predators and ***,the detection of biologically important stimuli often has to occur against a background of noise generated by water movement,or movement of the fish *** such,separating signal and noise is“of the essence”in understanding the behavior and physiology of *** we discuss general issues of signal and noise in the lateral-line system and the behavioral and physiological strategies that are used by fish to enhance signal detection in a noisy *** order for signal and noise to be separated,they need to differ,and we will consider those differences under the headings of:frequency and temporal pattern;intensity discrimination;spatial separation;and mechanisms for the reduction of self-generated *** systematically cover the issues of signal and noise in lateral-line systems,but emphasize recent work on self-generated noise,and signal and noise issues related to prey search strategies and collision avoidance.

关键词： behavior lateral line mechanoreception noise physiology signal.

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Variable retention harvesting in the Douglas-fir region

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Ecological Processes 2020年第1期9卷 83-92页

作者： Jerry F.Franklin daniel c.Donato School of Environmental and Forest Science College of the EnvironmentUniversity of WashingtonSeattleWA 98195USA Washington Department of Natural Resources OlympiaWA 98504USA

Variable retention harvesting evolved in the Douglas-fir region of the Pacific Northwest gradually in response to increasing dissatisfaction with the ecological consequences of clear-cutting,from the standpoint of wildlife habitat and other important forest *** is a harvesting technique that can provide for retention(continuity)of such structures as large and old live trees,snags,and *** retention is based on the natural model of the biological legacies that are typically left behind following natural disturbances,such as wildfire,wind,and *** retention is also an important technique for fulfilling the first silvicultural principle of ecological forestry,that of providing for continuity in structure,function,and composition between forest *** history and current application of variable retention approaches on forests in western Washington and Oregon states(USA),where many of the fundamental concepts were first developed and applied,is described in this article.

关键词： Biological legacies Ecological forestry Biodiversity conservation Long-term sustainability Washington and Oregon states

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