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常见硫化物矿物中不可见金的富集

黄金地质科技 1991年第4期 63-72页

作者： nigel j.cook 金洪良

常见硫化物矿物晶格中的金及粒径小于1000埃的分散金均称为不可见金,它们无法用矿相显微镜和扫描电镜测到。离子探针微量分析(次级离子质谱法)表明,12个矿床硫化物矿物颗粒中不可见金的含量为0.5至1000ppm之间。不同矿床,或一个矿床中... 详细信息

常见硫化物矿物晶格中的金及粒径小于1000埃的分散金均称为不可见金,它们无法用矿相显微镜和扫描电镜测到。离子探针微量分析(次级离子质谱法)表明,12个矿床硫化物矿物颗粒中不可见金的含量为0.5至1000ppm之间。不同矿床,或一个矿床中不同矿石相间不可见金含量变化很大。最主要的载金矿物为毒砂和富砷黄铁矿。黄铁矿中金与砷含量呈正相关,表明种促进了金进入黄铁矿晶格。当两种或差别大的毒砂共生时,细粒毒砂更富含不可见金。磁黄铁矿、黄铜矿、斑铜矿、方铅矿和黝铜矿中不可见金的含量通常较低。

关键词：硫化物金富集黄铁矿

西藏加多捕勒矽卡岩矿床石榴子石微量元素特征:对Fe-Cu矿化分带的指示

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西藏加多捕勒矽卡岩矿床石榴子石微量元素特征:对Fe-Cu矿化分带的...

第八届全国成矿理论与找矿方法学术讨论会

作者：徐净郑有业李晓峰 Cristiana L.Ciobanu nigel j.cook 中国科学院地质与地球物理研究所矿产资源重点实验室中国地质大学资源学院中国科学院大学地球科学学院 The University of Adelaide School of Chemical Engineering

＜正＞加多捕勒矽卡岩型Fe-Cu矿床位于西藏念青唐古拉Fe-Cu-Pb-Zn-Ag多金属成矿带西段。矽卡岩铁矿体主要产于矿区南部始新世中粗粒黑云母二长花岗岩（51 Ma）和中二叠统下拉组碳酸盐接触带,主要由磁铁矿、石榴子石、阳起石以及少量的... 详细信息

＜正＞加多捕勒矽卡岩型Fe-Cu矿床位于西藏念青唐古拉Fe-Cu-Pb-Zn-Ag多金属成矿带西段。矽卡岩铁矿体主要产于矿区南部始新世中粗粒黑云母二长花岗岩（51 Ma）和中二叠统下拉组碳酸盐接触带,主要由磁铁矿、石榴子石、阳起石以及少量的辉石、黄铁矿、黄铜矿组成;矽卡岩铜矿体则呈层状赋存于矿区北部中二叠统下拉组碳酸盐与砂岩层间接触带,主体由石榴子石、辉石、黄铜矿、斑铜矿构成;在矿区中部有少

关键词：磁铁矿成矿地质矽卡岩石榴子石地球化学特征

攀枝花层状侵入体中Fe-Ti氧化物出溶结构特征及其地质意义的纳米尺度研究

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攀枝花层状侵入体中Fe-Ti氧化物出溶结构特征及其地质意义的纳米...

中国矿物岩石地球化学学会第17届学术年会

作者：高文元黄菲 Cristiana L.Ciobanu nigel j.cook Ashley Slattery 宋丹东北大学资源与土木工程学院深部金属矿山安全开采教育部重点实验室 School of Chemical Engineering The University of Adelaide Adelaide Microscopy The University of Adelaide 东北大学科学技术研究院分析测试中心

＜正＞我国四川攀枝花层状侵入体中赋存着储量巨大的钒钛磁铁矿,也保存着地壳岩浆房中岩浆演化的全部记录,是研究岩浆成岩成矿作用的天然实验室。在攀枝花层状侵入体中广泛分布着纳-微米Fe-Ti氧化物出溶结构。Fe-Ti氧化物包括钛磁铁矿... 详细信息

＜正＞我国四川攀枝花层状侵入体中赋存着储量巨大的钒钛磁铁矿,也保存着地壳岩浆房中岩浆演化的全部记录,是研究岩浆成岩成矿作用的天然实验室。在攀枝花层状侵入体中广泛分布着纳-微米Fe-Ti氧化物出溶结构。Fe-Ti氧化物包括钛磁铁矿、钛铁矿和尖晶石等,在层状侵入体漫长的冷却过程中都会经历亚固相再平衡过程

关键词：钒钛磁铁矿叠加成矿作用攀枝花层状侵入体铁-钛氧化物出溶结构

Stable diffusion gradients in microfluidic conduits bounded by fluid walls

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Microsystems & Nanoengineering 2024年第3期10卷 357-367页

作者： Federico Nebuloni Cyril Deroy Peter R.cook Edmond j.Walsh Department of Engineering Science Osney Thermo-Fluids InstituteUniversity of OxfordOxford OX20ESUK Sir William Dunn School of Pathology University of OxfordOxford OX13REUK

Assays mimicking in vitro the concentration gradients triggering biological responses like those involved in fighting infections and blood clotting are essential for biomedical *** assays prove especially attractive as they allow precise control of gradient shape allied to a reduction in *** microfluidic devices are fabricated using solid plastics that prevent direct access to responding ***-walled microfluidics allows the manufacture of circuits on standard Petri dishes in seconds,coupled to simple operating methods;cell-culture medium sitting in a standard dish is confined to circuits by fluid walls made of an immiscible *** develop and experimentally validate an analytical model of diffusion between two or more aqueous streams flowing at different rates into a fluid-walled conduit with the cross-section of a circular *** solid walls,fluid walls morph during flows as pressures fall,with wall shape changing down the *** model is validated experimentally for Fourier numbers<0.1 using fluorescein diffusing between laminar *** enables a priori prediction of concentration gradients throughout a conduit,so allowing rapid circuit design as well as providing bioscientists with an accurate way of predicting local concentrations of bioactive molecules around responsive and nonresponsive cells.

关键词： walls diffusion attractive

攀枝花钒钛磁铁矿矿床中磁黄铁矿的种类及其纳米尺度的有序性

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攀枝花钒钛磁铁矿矿床中磁黄铁矿的种类及其纳米尺度的有序性

2020年中国地球科学联合学术年会

作者：高文元黄菲 Cristiana L.Ciobanu nigel j.cook Christian Maunders 陈振宇蔡剑辉东北大学资源与土木工程学院 School of Chemical Engineering and Advanced Materials The University of Adelaide School of Civil Environmental and Mining Engineering The University of Adelaide FEI Company 中国地质科学院矿产资源研究所

在岩浆型矿石中,铁硫化物以磁黄铁矿为主,与具有经济价值的富镍和钴的硫化物共生。磁黄铁矿是非化学计量相,其化学通式为FeS （x=0-0.125）。磁黄铁矿的非化学计量性与其铁空位有关,导致形成多种类型的超结构,从而引起磁性和表面性能的... 详细信息

在岩浆型矿石中,铁硫化物以磁黄铁矿为主,与具有经济价值的富镍和钴的硫化物共生。磁黄铁矿是非化学计量相,其化学通式为FeS （x=0-0.125）。磁黄铁矿的非化学计量性与其铁空位有关,导致形成多种类型的超结构,从而引起磁性和表面性能的急剧变化,对其浮选行为也具有一定的影响。

关键词：磁黄铁矿陨硫铁钒钛磁铁矿矿床纳米尺度攀枝花有序性

Etiology and management of urethral calculi:A systematic review of contemporary series

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Asian journal of Urology 2024年第1期11卷 10-18页

作者： Andrew Morton Arsalan Tariq nigel Dunglison Rachel Esler Matthew j.Roberts Faculty of Medicine The University of QueenslandBrisbaneQueenslandAustralia Department of Urology Ipswich HospitalQueenslandAustralia Department of Urology Royal Brisbane and Women's HospitalQueenslandAustralia The University of Queensland Centre for Clinical Research HerstonAustralia

Objective:To conduct a systematic literature review on urethral calculi in a contemporary cohort describing etiology,investigation,and management ***:A systematic search of MEDLINE and Cochrane Central Register of Controlled Trials(CENTRAL)databases was ***,including case reports and case series on urethral calculi published between january 2000 and December 2019,were ***-text manuscripts were reviewed for clinical parameters including symptomatology,etiology,medical history,investigations,treatment,and *** were collated and analyzed with univariate ***:Seventy-four publications met inclusion criteria,reporting on 95 *** symptoms(41.1%),pain(40.0%),and acute urinary retention(32.6%)were common presenting *** calculi were most often initially investigated using plain X-ray(63.2%),with almost all radio-opaque(98.3%).Urethral calculi were frequently associated with coexistent bladder or upper urinary tract calculi(16.8%)and underlying urethral pathology(53.7%)including diverticulum(33.7%)or stricture(13.7%).Urethral calculi were most commonly managed with external urethrolithotomy(31.6%),retrograde manipulation(22.1%),and endoscopic in situ lithotripsy(17.9%).Conclusion:This unique systematic review of urethral calculi provided a summary of clinical features and treatment trends with a suggested treatment *** in contemporary urological practice should be according to calculus size,shape,anatomical location,and presence of urethral pathology.

关键词： Urinary calculi Urethra Urethral calculi Management algorithm

The variation of DOM during long distance water transport by the China South to North Water Diversion Scheme and impact on drinking water treatment

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Frontiers of Environmental Science & Engineering 2024年第5期18卷 85-100页

作者： Hankun Yang Yujuan Li Hongyu Liu nigel j.D.Graham Xue Wu jiawei Hou Mengjie Liu Wenyu Wang Wenzheng Yu State Key Laboratory of Environmental Aquatic Chemistry Key Laboratory of Drinking Water Science and TechnologyResearch Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing100085China School of Environment and Municipal Engineering Qingdao Technological UniversityQingdao266033China Colleges of Forestry Northeast Forestry UniversityHarbin150006China Department of Civil and Environmental Engineering Imperial College LondonSouth Kensington CampusLondonSW7 2AZUK School of Chemistry and Chemical Engineering Beijing Institute of TechnologyBeijing100081China State Key Laboratory of Separation Membrane Processes School of Environment Science and EngineeringTiangong UniversityTianjin300387China

In this study,samples were taken from three locations,upstream to downstream,along the central route project of the China South to North Water Diversion(SNWD)scheme in summer and *** were used to reveal the variations of dissolved organic matter(DOM)during the water transfer process,and the effects of these variations on drinking water treatment and disinfection by-products formation potential(DBPs-FP).The results showed that polysaccharides accumulate in summer and reduce in winter with flow distance,which has an important effect on the overall properties of DOM,as well as on the performance of coagulation,ultrafiltration,and the formation of *** substances,and their hydrophilic content,also increased in summer and decreased in winter with flow *** contrast,the concentration of small organic substances(MW≤1000 Da)increased in both summer and winter with flow distance,which affected both nanofiltration(NF)membrane fouling and *** results provide a useful case study of spatial and temporal changes in raw water DOM during long distance water transfer and their impact on the treatment and quality of drinking water from the SNWD.

关键词： Long-distance water transfer The China South to North Water Diversion Scheme Coagulation Membrane filtration Disinfection by-products

The Triple Combination of Meropenem,Avibactam,and a Metallo-b-Lactamase Inhibitor Optimizes Antibacterial Coverage Against Different b-Lactamase Producers

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Engineering 2024年第7期38卷 124-132页

作者： Zhuoren Ling Alistair james Macdonald Farley Aditya Lankapalli Yanfang Zhang Shonnette Premchand-Branker Kate cook Andrei Baran Charlotte Gray-Hammerton Claudia Orbegozo Rubio Edgars Suna jordan Mathias jürgen Brem Kirsty Sands Maria Nieto-Rosado Maria Mykolaivna Trush Nadira Naznin Rakhi Willames Martins Yuqing Zhou Christopher joseph Schofield Timothy Walsh Department of Biology&Ineos Oxford Institute for Antimicrobial Research University of OxfordOxford OX13REUK Chemistry Research Laboratory Department of Chemistry and the Ineos Oxford Institute for Antimicrobial ResearchUniversity of OxfordOxford OX13TAUK Latvian Institute of Organic Synthesis Riga LV-1006Latvia Department of Medical Microbiology Division of Infection and ImmunitySchool of MedicineCardiff UniversityCardiff CF144XNUK Enzymology and Applied Biocatalysis Research Center Faculty of Chemistry and Chemical EngineeringBabes-Bolyai UniversityCluj-Napoca 400028Romania

This work explores the potential of a triple combination of meropenem(MEM),a novel metallo-blactamase(MBL)inhibitor(indole-2-carboxylate 58(InC58)),and a serine-b-lactamase(SBL)inhibitor(avibactam(AVI))for broad-spectrum activity against carbapenemase-producing bacteria.A diverse panel comprising MBL-and SBL-producing strains was used for susceptibility testing of the triple combination using the agar dilution *** frequency of resistance(FoR)to MEM combined with InC58 was *** were sequenced and tested for cross resistance,fitness,and the stability of the resistance *** with the double combinations of MEM plus an SBL or MBL inhibitor,the triple combination extended the spectrum of activity to most of the isolates bearing SBLs(oxacillinase-48(OXA-48)and Klebsiella pneumoniae carbapenemase-2(KPC-2))and MBLs(New Delhi metallo-blactamases(NDMs)),although it was not effective against Verona integron-encoded metallo-blactamase(VIM)-carrying Pseudomonas aeruginosa(***)and OXA-23-carrying Acinetobacter baumannii(***).The FoR to MEM plus InC58 ranged from 2.22×10^(-7)to 1.13×10^(-6).The resistance correlated with mutations to ompC and comR,affecting porin C and copper permeability,*** mutants manifested a fitness cost,a decreased level of resistance during passage without antibiotic pressure,and cross resistance to another carbapenem(imipenem)and a b-lactamase inhibitor(taniborbactam).In conclusion,compared with the dual combinations,the triple combination of MEM with InC58 and AVI showed a much wider spectrum of activity against different carbapenemaseproducing bacteria,revealing a new strategy to combat b-lactamase-mediated antimicrobial resistance.

关键词： Carbapenemase Metallo/serine-b-lactamase inhibitor Avibactam Meropenem Antimicrobial resistance

Detecting subtle yet fast skeletal muscle contractions with ultrasoft and durable graphene-based cellular materials

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National Science Review 2022年第4期9卷 105-115页

作者： Zijun He Zheng Qi Huichao Liu Kangyan Wang Leslie Roberts jefferson Z.Liu Yilun Liu Stephen j.Wang Mark j.cook George P.Simon Ling Qiu Dan Li Department of Chemical Engineering The University of Melbourne Department of Materials Science and Engineering Monash University Department of Chemical Engineering Monash University State Key Laboratory for Strength and Vibration of Mechanical Structures School of Aerospace EngineeringXi'an Jiaotong University Neurophysiology Department Department of Neurology and Neurological ResearchSt Vincent's Hospital Department of Medicine St.Vincent's HospitalUniversity of Melbourne Department of Mechanical Engineering University of Melbourne Department of Design Monash University School of Design The Hong Kong Polytechnic University Shenzhen Geim Graphene Center Tsinghua-Berkeley Shenzhen InstituteTsinghua University

Human bodily movements are primarily controlled by the contractions of skeletal muscles. Unlike joint or skeletal movements that are generally performed in the large displacement range, the contractions of the skeletal muscles that underpin these movements are subtle in intensity yet high in frequency. This subtlety of movement makes it a formidable challenge to develop wearable and durable so?t materials to electrically monitor such motions with high fidelity for the purpose of, for example, muscle/neuromuscular disease diagnosis. Here we report that an intrinsically fragile ultralow-density graphene-based cellular monolith sandwiched between silicone rubbers can exhibit a highly effective stress and strain transfer mechanism at its interface with the rubber, with a remarkable improvement in stretchability(>100%). In particular, this hybrid also exhibits a highly sensitive, broadband-frequency electrical response(up to 180 Hz) for a wide range of strains. By correlating the mechanical signal of muscle movements obtained from this hybrid material with electromyography, we demonstrate that the strain sensor based on this hybrid material may provide a new, so?t and wearable mechanomyography approach for real-time monitoring of complex neuromuscular–skeletal interactions in a broad range of healthcare and human–machine interface applications. This work also provides a new architecture-enabled functional so?t material platform for wearable electronics.

关键词： cellular graphene strain sensors high-frequency electromechanical property surface mechanomyography skeletal muscle activity