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Biogeochemical cycling of metals impacting by microbial mobilization and immobilization

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Journal of Environmental Sciences 2018年第4期30卷 146-154页

作者： Ran Jing Birthe v.Kjellerup University of Maryland at College Park Department of Civil and Environmental Engineering 1147 Glenn L.Martin Hall College Park

Microbial mobilization and immobilization processes can affect the bioavailability and mobility of metals thereby influencing their toxicity and can therefore be utilized to treat solid and liquid wastes contaminated by metals. However, the microbial mobilization and immobilization of metals depends on the microbial metabolism, the environment conditions. In this review, mobilization and immobilization of metals are discussed with regard to the presence and function of involved microorganisms and in relation to applications such as bioleaching. Furthermore, the biosorption process is evaluated as a possible approach for microbial immobilization of metal on the basis of four mechanisms：（1） physical adsorption,（2） ion exchange,（3） complexation, and（4） microprecipitation. In addition, sulfide precipitation by sulfate reducing bacteria was included as an example of an application of microbial immobilization. Based on the evaluation and recommendations in this paper, bioremediation strategies for metals can be improved thus increasing the opportunity for field applications.

关键词： Bioleaching Biosorption Microbial immobilization Microbial mobilization Metals Toxicity

Uv-LED projection photolithography for high-resolution functional photonic components

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Microsystems & Nanoengineering 2021年第4期7卷 149-159页

作者： Lei Zheng Urs Zywietz Tobias Birr martin Duderstadt Ludger Overrmeyer Bernhard Roth Carsten Reinhardt Hannover Centre for Optical Technologies Leibniz University HannoverHannoverLower Saxony 30167Germany Cluster of Excellence PhoenixD(Photonics Opticsand Engineering-Innovation Across Disciplines)HannoverLower Saxony 30167Germany Laser Zentrum Hannover e.v HannoverLower Saxony 30167Germany Institute of Transport and Automation Technology Leibniz University HannoverGarbsenLower Saxony 30823Germany Bremen University of Applied Science BremenBremen 28199Germany

The advancement of micro-and nanostructuring techniques in optics is driven by the demand for continuous miniaturization and the high geometrical accuracy of photonic devices and integrated ***,Uv-LED projection photolithography is demonstrated as a simple and low-cost approach for rapid generation of two-dimensional optical micro-and nanostructures with high resolution and accuracy using standard optics *** developed system enables the projection of structure patterns onto a substrate with 1000-fold *** devices,e.g.,waveguides and microring resonators,on rigid or flexible substrates with varied geometrical complexity and overall structure dimensions from the nanometer to centimeter scale were successfully *** particular,high-resolution gratings with feature sizes down to 150 nm and periods as small as 400 nm were realized for the first time by this *** made of doped laser active materials were fabricated,and their spontaneous emission was *** demonstrated superior performance of the developed approach may find wide applications in photonics,plasmonics,and optical materials science,among others.

关键词： projection resolution optics

Acid-treated Fe-doped TiO2 as a high performance photocatalyst used for degradation of phenol under visible light irradiation

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Journal of Environmental Sciences 2019年第9期31卷 183-194页

作者： vahid Moradi Faysal Ahmed martin B.G. Jun Arthur Blackburn Rodney A. Herring Mechanical Engineering Department University of Victoria Victoria British Columbia V8W 2Y2 Canada Center for Advanced Materials and Related Technology University of Victoria Victoria British Columbia V8W 2Y2 Canada School of Mechanical Engineering Purdue University West Lafayette IN 47907-2088 USA

The photocatalytic activity of Fe-doped TiO2 nanoparticles is significantly increased by an acid-treatment process. The photocatalyst nanoparticles were prepared using sol–gel method with 0.5 mol% ratio of Fe:Ti in acidic pH of 3. The nanoparticles were structurally characterized by means of X-ray diffraction(XRD), high-resolution transmission electron microscope(HRTEM), energy-dispersive X-ray spectroscopy(EDX), X-ray photoelectron spectroscopy(XPS) and diffuse reflectance spectroscopy(DRS). It was observed that the photocatalytic activity suffered from an iron oxide contaminating layer deposited on the surface of the nanoparticles. This contamination layer was removed using an HCl acidtreatment process. The photocatalytic activity using 500 mg/L of Fe0.5-TiO2 in a 10 mg/L of phenol solution increased significantly from 33% to 57%(about 73% increase in the performance), within 90 min of reaction time under visible light irradiation. This significant improvement was achieved by removing the iron oxide contamination layer from the surface of the nanoparticles and adjusting p H to mild acidic and basic pHs.

关键词： Phenol degradation visible light Photocatalyst Kinetics Iron doping

Strong Labelings of Linear Forests

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Acta Mathematica Sinica,English Series 2009年第12期25卷 1951-1964页

作者： martin BACA Yu Qing LIN Francesc A. MUNTANER-BATLE Miquel RIUS-FONT Department of Applied Mathematics Technical University in Kosice Letnd 9 04200 Kosice Slovakia School of Electrical Engineering and Computer Science The University of Newcastle Newcastle NSW 2308 Australia Facultat de Ciencies Polltiques i Jurldiques Universitat Internacional de Catalunya Barcelona Catalunya 08017 Spain Departament de Matematica Aplicada i Telematica Universitat Politecnica de Catalunya Barcelona Catalunya 08034 Spain

A （p, q）-graph G is called super edge-magic if there exists a bijective function f ： v（G） U E（G） →{1, 2 p＋q} such that f（u）＋ f（v）＋f（uv） is a constant for each uv C E（G） and f（Y（G）） = {1,2,...,p}. In this paper, we introduce the concept of strong super edge-magic labeling as a particular class of super edge-magic labelings and we use such labelings in order to show that the number of super edge-magic labelings of an odd union of path-like trees （mT）, all of them of the same order, grows at least exponentially with m.

关键词： linear forest path-like tree strong super edge magic labeling

Straight and kinked InAs nanowire growth observed in situ by transmission electron microscopy

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Nano Research 2014年第8期7卷 1188-1194页

作者： Filip Lenrick martin Ek Knut Deppert Lars Samuelson L. Reine Wallenberg nCHREM/Centre for Analysis and Synthesis Lund University Lund 22100 Sweden Division of Solid State Physics Lund University Lund 22100 Sweden

Live observations of growing nanowires using in situ transmission electron microscopy （TEM） is becoming an increasingly important tool for understanding the dynamic processes occurring during nanowire growth. Here we present observations of growing InAs nanowires, which constitute the first reported in situ growth of a In-v compound in a transmission electron microscope. Real time observations of events taking place over longer growth lengths were possible due to the high growth rates of up to I nm/s that were achieved. Straight growth （mainly in 〈111〉B directions） was observed at uniform temperature and partial pressure while intentional fluctuations in these conditions caused the nanowires to form kinks and change growth direction. The mechanisms behind the kinking are discussed in detail. In situ observations of nanowire kinking has previously only been reported for nonpolar diamond structure type materials （such as Si）, but here we present results for a polar zinc blende structure （InAs）. In this study a closed cell with electron and X-ray transparent a-SiN windows was used in a conventional high resolution transmission electron microscope, enabling high resolution imaging and compositional analysis in between the growth periods.

关键词： environmental TEM nanowires in situ InAs group III-v kinking

Telemedicine platform for health assessment remotely by an integrated nanoarchitectonics FePS_(3)/rGO and Ti_(3)C_(2)-based wearable device

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npj Flexible Electronics 2022年第1期6卷 735-744页

作者： Jayraj v.vaghasiya Carmen C.Mayorga-martinez martin Pumera Center for Advanced Functional Nanorobots Department of Inorganic ChemistryFaculty of Chemical TechnologyUniversity of Chemistry and Technology PragueTechnická516628 PragueCzech Republic Energy Research Institute@NTU(ERI@N) Research Techno PlazaX-Frontier BlockLevel 550 Nanyang Drive637553 SingaporeSingapore Faculty of Electrical Engineering and Computer Science VSB-Technical University of Ostrava17.listopadu 2172/1570800 OstravaCzech Republic Department of Medical Research China MedicalUniversity HospitalChina Medical UniversityNo.91 Hsueh-Shih RoadTaichung 40402Taiwan

Due to the emergence of various new infectious(viral/bacteria)diseases,the remote surveillance of infected persons has become most important,especially if hospitals need to isolate infected patients to prevent the spreading of pathogens to health care ***,we develop a remote health monitoring system by integrating a stretchable asymmetric supercapacitor(SASC)as a portable power source with sensors that can monitor the human physical health condition in real-time and *** abnormal body temperature and breathing rate could indicate a person’s sickness/infection *** we integrated FePS3@graphene-based strain sensor and SASC into an all-in-one textile system and wrapped it around the abdomen to continuously monitor the breathing cycle of the *** real body temperature was recorded by integrating the temperature sensor with the *** proposed system recorded physiological parameters in real-time and when monitored remotely could be employed as a screening tool for monitoring pathogen infection status.

关键词： integrating wear portable

Near-infrared fluorescence sentinel lymph node detection in gastric cancer: A pilot study

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World Journal of Gastroenterology 2016年第13期22卷 3644-3651页

作者： Quirijn RJG Tummers Leonora SF Boogerd Wobbe O de Steur Floris PR verbeek martin C Boonstra Henricus JM Handgraaf John v Frangioni Cornelis JH van de velde Henk H Hartgrink Alexander L vahrmeijer Department of Surgery Leiden University Medical Center 2333 ZA Leiden The Netherlands Division of Hematology/Oncology Department of Medicine and Department of Radiology Beth Israel Deaconess Medical Center Boston MA 02215 United States Curadel LLC 377 Plantation Street Worcester MA 01605 United States

AIM: To investigate feasibility and accuracy of near-infrared fluorescence imaging using indocyanine green: nanocolloid for sentinel lymph node (SLN) detection in gastric ***: A prospective, single-institution, phase I feasibility trial was conducted. Patients suffering from gastric cancer and planned for gastrectomy were included. During surgery, a subserosal injection of 1.6 mL ICG:Nanocoll was administered around the tumor. NIR fluorescence imaging of the abdominal cavity was performed using the Mini-FLARE™ NIR fluorescence imaging system. Lymphatic pathways and SLNs were visualized. Of every detected SLN, the corresponding lymph node station, signal-to-background ratio and histopathological diagnosis was determined. Patients underwent standard-of-care gastrectomy. Detected SLNs outside the standard dissection planes were also resected and ***: Twenty-six patients were enrolled. Four patients were excluded because distant metastases were found during surgery or due to technical failure of the injection. In 21 of the remaining 22 patients, at least 1 SLN was detected by NIR Fluorescence imaging (mean 3.1 SLNs; range 1-6). In 8 of the 21 patients, tumor-positive LNs were found. Overall accuracy of the technique was 90% (70%-99%; 95%CI), which decreased by higher pT-stage (100%, 100%, 100%, 90%, 0% for respectively Tx, T1, T2, T3, T4 tumors). All NIR-negative SLNs were completely effaced by tumor. Mean fluorescence signal-to-background ratio of SLNs was 4.4 (range 1.4-19.8). In 8 of the 21 patients, SLNs outside the standard resection plane were identified, that contained malignant cells in 2 ***: This study shows successful use of ICG:Nanocoll as lymphatic tracer for SLN detection in gastric cancer. Moreover, tumor-containing LNs outside the standard dissection planes were identified.

关键词： Gastric cancer Sentinel lymph node Near-infrared fluorescence imaging Image-guided surgery Indocyanine green

Acidiella bohemica gen. et sp. nov. and Acidomyces spp. (Teratosphaeriaceae), the indigenous inhabitants of extremely acidic soils in Europe

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Fungal Diversity 2013年第1期58卷 33-45页

作者： martina Hujslová Alena Kubátová martin Kostovčík Miroslav Kolařík Department of Botany Faculty of ScienceCharles University in PragueBenátská2CZ-12801 Prague 2Czech Republic Laboratory of Fungal Genetics and Metabolism Institute of Microbiology of the ASCRv.v.i.Vídeňská1083CZ-14220 Prague 4Czech Republic Research Institute of Crop Production Drnovská507Prague 6 CZ-16106Czech Republic Department of Genetics and Microbiology Faculty of ScienceCharles University in PragueViničná5CZ-12844 Prague 2Czech Republic

Extremely acidic soils(pH<3)harbour mycobiota that are different from less acidic habitats and are dominated by a small number of fungal *** investigation of the mycobiota of highly acidic soils in the Czech Republic ... 详细信息

Extremely acidic soils(pHvestigation of the mycobiota of highly acidic soils in the Czech Republic and Iceland,a group of melanised fungal isolates was *** on phenotype and nuclear ribosomal DNA sequences(ITS region,SSU,LSU),the isolates were accommodated by three phylogenetic lineages within the family Teratosphaeriaceae(Capnodiales,Dothideomycetes).The first lineage is here described as a new acidotolerant genus and species Acidiella bohemica *** *** most closely related species to this new clade are other extremotolerant fungi isolated from rocks and lichens collected in the Alps and Antarctica as well as leaf-spotting species and opportunistic human *** isolates belonging to the second and the third lineages were identified as the recently described acidophilic fungi Acidomyces acidophilus and Teratosphaeria acidotherma,*** taxonomic status of both sister species is discussed and the latter species is ascribed here to the genus Acidomyces.

关键词： Black yeast Acidotolerant Acidomyces acidophilus Teratosphaeria acidotherma Soil fungi Ascomycota

Two-Photon Dissociation Dynamics of Hydroxyl Radical

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Chinese Journal of Chemical Physics 2020年第2期33卷 129-134,I0002页

作者： Ge Sun Xian-feng Zheng Yuan Qin Yu Song Jingsong Zhang Jose martin Amero Gabriel J.vázquez Department of Chemistry University of California at RiversideRiversideCalifornia 92521U.S.A. Instituto de Ciencias Físicas Universidad Nacional Aut onoma de MéxicoCuernavacaMorelos 62251México

Two-photon dissociation dynamics of the OH radical is studied using the high-n Rydberg atom time-of-flight(HRTOF) technique. The H(2 S)+O(1 D) and H(2 S)+O(1 S) product channels are observed in the dissociation of the OH radical on the 22Π and B2Σ+repulsive states, respectively, from sequential two-photon excitation via the A2Σ+(v′=2, J′=0.5-2.5)state. Both H+O product channels have anisotropic angular distributions, with β=-0.97 for H(2 S)+O(1 D) and 1.97 for H(2 S)+O(1 S). The anisotropic angular distributions are consistent with a mechanism of OH direct dissociation on the repulsive potential energy curves(PECs) leading to the H+O products. The OH bond dissociation energy D0(O-H) is determined to be 35580±15 cm-1.

关键词： Photodissociation Hydroxyl radical Excited state Potential energy curves