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Recent developments in Metallic degradable Micromotors for Biomedical and Environmental Remediation Applications

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Nano-Micro Letters 2024年第3期16卷 1-35页

作者： Sourav dutta Seungmin Noh Roger Sanchis Gual Xiangzhong Chen Salvador Pané bradley J.Nelson Hongsoo Choi department of Robotics and Mechatronics Engineering Daegu Gyeongbuk Institute of Science and Technology(DGIST)Daegu 42988Republic of Korea dGIST‑ETH Microrobotics Research Center DGISTDaegu 42988Republic of Korea Multi‑Scale Robotics Lab Institute of Robotics and Intelligent SystemsETH Zurich8092 ZurichSwitzerland Institute of Optoelectronics State Key Laboratory of Photovoltaic Science and TechnologyShanghai Frontiers Science Research Base of Intelligent Optoelectronics and PerceptionFudan UniversityShanghai 200433People’s Republic of China

Synthetic micromotor has gained substantial attention in biomedicine and environmental ***-based degradable micromotor composed of magnesium(Mg),zinc(Zn),and iron(Fe)have promise due to their nontoxic fuel-free propulsion,favorable biocompatibility,and safe excretion of degradation products Recent advances in degradable metallic micromotor have shown their fast movement in complex biological media,efficient cargo delivery and favorable biocompatibility.A noteworthy number of degradable metal-based micromotors employ bubble propulsion,utilizing water as fuel to generate hydrogen *** novel feature has projected degradable metallic micromotors for active in vivo drug delivery *** addition,understanding the degradation mechanism of these micromotors is also a key parameter for their design and *** propulsion efficiency and life span govern the overall performance of a degradable metallic *** we review the design and recent advancements of metallic degradable ***,we describe the controlled degradation,efficient in vivo drug delivery,and built-in acid neutralization capabilities of degradable micromotors with versatile biomedical ***,we discuss micromotors’efficacy in detecting and destroying environmental ***,we address the limitations and future research directions of degradable metallic micromotors.

关键词： Magnesium Zinc Iron Biodegradable microrobot Biomedical Environmental

The silent spermatozoon： are man-made endocrine disruptors killing male fertility？

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Asian Journal of Andrology 2013年第2期15卷 165-168,I0004页

作者： bradley d Anawalt department of Medicine University of Washington Seattle WA 98195 USA

In 1992, a danish group led by Skakkebaek , reported in a meta-analysis that global mean sperm counts were fallingandthat testicular cancer, hypospadias and cryptorchidism were increasing. They hypothesized that environmental factors were the cause. Their rectaanalysis was criticized subsequently for many methodological flaws. However, their controversial metamlysls and hypothesis spurred pubfic and scientific interest in the study of male reproductive function and stimulated more rigorous scientific work in the area. Subsequent research has not convincingly supported their hypothesis, However, it is caudal to continue high quality studies of the effects of drugs and manmade pollutants on male eeproductlve function.

关键词： dETERIORATING SEMEN QUALITY SPERM COUNTS REFERENCE VALUES INFERTILE MEN NO EVIdENCE dANISH MEN HEALTHY PERIOd dECLINE OBESITY

Growth and competition among understory plants varies with reclamation soil and fertilization

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Ecological Processes 2018年第1期7卷 116-123页

作者： Jennifer Buss Kyle Stratechuk bradley d.Pinno department of Renewable Resources University of AlbertaEdmontonAlbertaCanada

Introduction:Following oil sands mining in Alberta,Canada,the main land management goal is to establish a functioning boreal forest ecosystem,including the understory plant *** of the challenges with restoring the understory is the presence of non-native species that compete with desirable native species for *** a greenhouse experiment,we studied the growth of two native understory species(Galium boreale and Vicia americana)and a non-native invasive species(Matricaria perforata)grown with either intra-or interspecific neighbors across three common land reclamation soils and a nitrogen fertilizer ***:When grown by itself,*** aboveground biomass did not differ among soil or fertilizer treatments,likely due to its ability to fix *** of *** was directly related to soil nitrogen,and it had the greatest increase in biomass with *** and biomass of *** was less than the other species,and it had the highest mortality in the nitrogen-poor *** grown together,the proportional biomass of *** and *** varied with soil treatment such that *** was dominant in the high-nitrogen forest floormineral mix treatment while *** was dominant in the low-nitrogen peat-mineral ***:Operationally,care should be taken when applying fertilizer to reclamation areas,as it may have an unwanted positive effect on growth for undesirable non-native plants at the expense of native *** terms of seed mixtures,*** may be a good option for low inorganic nitrogen resource soils and *** for high nitrogen resource soils.

关键词： Matricaria perforata Galium boreale Vicia americana Forest floor-mineral mix Peat-mineral mix Oil sands reclamation

Why is understanding the relationship of testosterone to cardiovascular risk so important？

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Asian Journal of Andrology 2018年第2期20卷 107-108页

作者： Bu B Yeap bradley d Anawalt School of Medicine University of Western Australia Perth Western Australia 6009 Australia department of Endocrinology and diabetes Fiona Stanley Hospital Perth Western Australia 6150 Australia department of Medicine University of Washington School of Medicine Seattle Washington 98195 United States

Epidemiological studies hint at a beneficial influence of endogenous circulating testosterone （T）, or its metabolite dihydrotestosterone （dHT）, such that men with lower concentrations of T or dHT appear to have po... 详细信息

关键词： AUSTRALIA POSITION STATEMENT OLdER MEN MYOCARdIAL-INFARCTION ENdOCRINE-SOCIETY THERAPY ASSOCIATION MORTALITY

Conclusions about testosterone therapy and cardiovascular risk

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Asian Journal of Andrology 2018年第2期20卷 152-153页

作者： bradley d Anawalt Bu B Yeap division of Medicine University of Washington School of Medicine Seattle Washington 98195 United States School of Medicine University of Western Australia Perth Western Australia 6009 Australia department of Endocrinology and diabetes Fiona Stanley Hospital Perth Western Australia 6150 Australia

In this issue of Asian Journal of Andrology （AJA）, several experts have reviewed L the latest data on the potential and known effects of endogenous and exogenous testosterone （T） on cardiovascular risk. In the review by Meyer and Wittert, low endogenous serum T appears to be associated with higher risk of cardiovascular disease and overall mortality in certain populations such as Klinefelter syndrome and older men,

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Where physics meets chemistry： Thin film deposition from reactive plasmas

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Frontiers of Chemical Science and Engineering 2016年第4期10卷 441-458页

作者： Andrew Michelmore Jason d. Whittle James W. bradley Robert d. Short School of Engineering University of South Australia Mawson Lakes Australia SA 5095 Future Industries Institute University of South Australia Mawson Lakes Australia SA 5095 department of Electrical Engineering and Electronics University of Liverpool Liverpool L69 3GJ UK Material Science Institute Lancaster University Lancaster LA1 4YW UK

Functionalising surfaces using polymeric thin films is an industrially important field. One technique for achieving nanoscale, controlled surface functionalization is plasma deposition. Plasma deposition has advantages over other surface engineering processes, including that it is solvent free, substrate and geometry independent, and the surface properties of the film can be designed by judicious choice of precursor and plasma conditions. despite the utility of this method, the mechanisms of plasma polymer growth are generally unknown, and are usually described by chemical （i.e., radical） pathways. In this review, we aim to show that plasma physics drives the chemistry of the plasma phase, and surface-plasma interactions. For example, we show that ionic species can react in the plasma to form larger ions, and also arrive at surfaces with energies greater than 1000 kJ·mol^-1 （〉10 eV） and thus facilitate surface reactions that have not been taken into account previously. Thus, improving thin film deposition processes requires an understanding of both physical and chemical processes in plasma.

关键词： thin films plasma physics plasma chemistry,functionalization polymer

Thermoluminescence Responses of Photon and Electron Irradiated Ge- and Al-doped SiO_(2) Optical Fibres

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Chinese Physics Letters 2012年第2期29卷 208-210页

作者： H.Wagiran I.Hossain d.bradley A.N.H.Yaakob T.Ramli department of Physics Universiti Teknologi Malaysia81310 SkudaiJohor Darul TakzimMalaysia department of Physics University of SurreyGuildfordGU27XHUK

We carry out a comparison of the thermoluminescence (TL) response of photon and electron irradiated Ge- and Al-doped SiO_(2) optical fibres,as well as cross-comparison with that of *** is made with 6 MeV electrons and 6 MV photons,for doses ranging from 0.2 Gy to *** commercially available Al- and Gedoped optical fibres produce a linear dose-TL *** TL yield for both of the doped fibres and also for TLd-100 is greater for electron irradiation than for photon *** TL yield of the Al-doped fibres is a small fraction of that of Ge-doped fibres (by a factor of 25),the Ge-doped fibres offering a response of 59%o of that of TLd-100.

关键词： irradiation Electron irradiated

Linking uplift and mineralisation at the Mount Novit Zn-Pb-Ag deposit,Northern Australia:Evidence from geology,U-Pb geochronology and sphalerite geochemistry

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Geoscience Frontiers 2022年第2期13卷 333-350页

作者： bradley Cave William Perkins Richard Lilly department of Earth Sciences University of AdelaideAdelaideSAAustralia Geological Survey of Queensland BrisbaneQLDAustralia

The subeconomic Mount Novit Zn-Pb-Ag deposit is located approximately 20 km south of Mount Isa,*** contrast to the nearby Mount Isa,Hilton and George Fisher Zn-Pb-Ag deposits,mineralisation at Mount Novit is situated to the west of the regional-scale Mount Isa Fault and is hosted in the Moondarra Siltstone as opposed to the Urquhart ***-grade(d veining and consists of pyrrhotite,pyrite and sphalerite with lesser ***-grade(>10 wt.%Zn+Pb)mineralisation occurs as a matrix supported breccia dominated by sphalerite and pyrrhotite with galena,pyrite,and ***-situ U-Pb geochronology was completed on apatite and two textural varieties of ***-grained(dral to anhedral monazite is located within highly foliated biotite alteration directly adjacent Zn-Pb-Ag mineralisation and yields a mean weighted^(207)Pb/^(206)Pb age of 1527±18 Ma(MSWd=1.06).This age is consistent with the formation of highly foliated biotite alteration during d;deformation of the Isan *** from the same fabric yields a lower intercept age of1443±29 Ma(MSWd=1.30).Consistent with previous studies,this age is interpreted to represent the age of a major thrusting event along the Mount Isa Fault that resulted in the cooling of the Mount Novit area below~375℃.Coarse-grained monazite is coeval with Zn-Pb-Ag mineralisation and yields a mean weighted^(207)Pb/^(206)Pb age of 1457±11 Ma(MSWd=0.28).Sphalerite from Mount Novit has low concentrations(d Ga and a relatively high concentration of In(5 to>10 ppm),possibly reflecting the leaching of the metals from an underlying basement *** GGIMFis geothermometer(Frenzel et al.,2016)produced a mean formation temperature of 345±52℃.The timing and temperature of Zn-Pb-Ag mineralisation is consistent with the age and cooling temperature of apatite presented in this *** on these correlations,we

关键词： Mount Isa Mount Novit Zn-Pb-Ag mineralisation Monazite Apatite Geochronology

Evolutionary Lineages and Functional diversification of Plant Hexokinases

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Molecular Plant 2010年第2期3卷 334-346页

作者： Rucha Karve Michael Lauria Annie Virnig Xiaoxia Xia bradley L. Rauh Brandon d. Moore department of Genetics and Biochemistry Clemson University Clemson SC 29634 USA

Sequencing data from 10 species show that a plant hexokinase （HXK） family contains 5-11 genes. Functionally, a given family can include metabolic catalysts, glucose signaling proteins, and non-catalytic, apparent regulatory enzyme homologs. This study has two goals. The first aim is to develop a predictive method to determine which HXK proteins within a species have which type of function. The second aim is to determine whether HXK-dependent glucose signaling proteins occur among more primitive plants, as well as among angiosperms. Using a molecular phylogeny ap- proach, combined with selective experimental testing, we found that non-catalytic HXK homologs might occur in all plants, including the relatively primitive Selaginella moellendorffi. We also found that different lineages of angiosperm HXKs have apparent conserved features for catalytic activity and for sub-cellular targeting. Most higher-plant HXKs are expressed predominantly at mitochondria, with HXKs of one lineage occurring in the plastid, and HXKs of one monocot lineage occurring in the cytosol. Using protoplast transient expression assays, we found that HXK glucose signaling pro- teins occur likely in all higher plants and in S. moellendorffi as well. Thus, the use of glucose by plant HXK isoforms in metabolism and/or as a regulatory metabolite occurs as widespread, conserved processes.

关键词： Hexokinase molecular phylogeny moonlighting proteins plant glucose signaling Selaginella.