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用湿法冶金方法从黄铁矿烧渣中回收金、银、铜和锌

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矿产综合利用 1986年第2期 51-55页

作者： c.nunez 汪镜亮

前言伊比利亚矿带的黄铁矿是含有44％以上的S和约4％cu+Zn+Pb的多金属硫化矿。黄铁矿为主要矿物,并伴生有少量的黄铜矿。闪锌矿和方铅矿,以及砷黄铁矿、金和银。经济上很重要的一个特点,是矿物呈细粒共生状态存在。由于这些特征,再加上

关键词：黄铁矿烧渣铁酸盐湿法冶金回收金

通过氰化前的预先硫化处理以改善西班牙铁帽矿的金银回收

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国外金属矿选矿 1988年第2期 28-32页

作者： c.nunez A.Roca 何建忠

西班牙韦尔瓦省Rio Tinto地区的铁帽,是一种主要由赤铁矿、针铁矿和α—石英组成的氧化矿。它还含有1.5—2.5克/吨的金和50—70克/吨的银。目前,该矿石采用逆流倾析工艺,用氧化物溶液浸出,得到金回收率为80％,但银回收率仅40％。试验研... 详细信息

西班牙韦尔瓦省Rio Tinto地区的铁帽,是一种主要由赤铁矿、针铁矿和α—石英组成的氧化矿。它还含有1.5—2.5克/吨的金和50—70克/吨的银。目前,该矿石采用逆流倾析工艺,用氧化物溶液浸出,得到金回收率为80％,但银回收率仅40％。试验研究表明,在氧化作业前先用硫化钠溶液对矿石进行处理,可显著提高银的回收率,而金回收率亦有少量增加。依据不同试验条件,55—77％的银和87—95％的金得以回收。

关键词：金回收率矿石硫化处理银回收率硫化钠硫化物铁帽西班牙南欧

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氰化前用预先硫化法提高铁帽中金银的回收率

矿产保护与利用 1988年第1期 21-25页

作者： c.nunez 朱及天朱云■

位于西班牙西南部威尔省的约丁都铁帽是由一些硫化物(主要是黄铁矿)风化后产生的一种氧化矿石。其主要矿物有赤铁矿、针铁矿和α-石英石,次要成分有铅铁矾中的铅、臭葱石中的砷、重晶石中的钡和钛铁矿中的钛;含量低于0.1%的其它元素有... 详细信息

位于西班牙西南部威尔省的约丁都铁帽是由一些硫化物(主要是黄铁矿)风化后产生的一种氧化矿石。其主要矿物有赤铁矿、针铁矿和α-石英石,次要成分有铅铁矾中的铅、臭葱石中的砷、重晶石中的钡和钛铁矿中的钛;含量低于0.1%的其它元素有锡、锑、铜、锌、铋、硒、银和金。

关键词：回收率接触时间实收率搅拌速度硫化钠硫化物 NaOH 逆流倾析矿石溶度积铁帽氰化钠氰化物

Acquired sensorineural hearing loss,oxidative stress,and microRNAs

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Neural Regeneration Research 2025年第9期20卷 2513-2519页

作者： Desmond A.nunez Ru c.Guo Division of Otolaryngology–Head&Neck Surgery Department of SurgeryFaculty of MedicineThe University of British ColumbiaVancouverBCCanada Division of Otolaryngology–Head&Neck Surgery Gordon&Leslie Diamond Health Care CentreVancouver General HospitalVancouverBCCanada Faculty of Medicine–The University of British columbia VancouverBCCanada

Hearing loss is the third leading cause of human ***-related hearing loss,one type of acquired sensorineural hearing loss,is largely responsible for this escalating global health ***-induced,ototoxic,and idiopathic sudden sensorineural are other less common types of acquired hearing *** etiology of these conditions is complex and multi-fa ctorial involving an interplay of genetic and environmental *** stress has recently been proposed as a likely linking cause in most types of acquired sensorineural hearing *** non-coding RNA sequences known as microRNAs(miRNAs)have increasingly been shown to play a role in cellular hypoxia and oxidative stress responses including promoting an apoptotic *** hair cell death is a central histopathological finding in sensorineural hearing *** these cells do not regenerate in humans,it underlies the irreversibility of human age-related hearing *** EMBASE,Ovid MEDLINE,Web of Science core collection,and *** databases over the period August 1,2018 to July 31,2023 were searched with"hearing loss,""hypoxamiRs,""hypoxia,""microRNAs,""ischemia,"and"oxidative stress"text words for English language primary study publications or registered clinical *** red clinical trials known to the senior author we re also assessed.A total of 222studies were thus *** excluding duplicates,editorials,retra ctions,secondary research studies,and non-English language articles,39 primary studies and clinical trials underwent full-text *** resulted in 11 animal,in vitro,and/or human subject journal articles and 8 registered clinical trial database entries which form the basis of this narrative *** miR-34a and miR-29b levels increase with age in *** miRNAs were demonstrated in human neuroblastoma and murine cochlear cell lines to target Sirtuin 1/peroxisome proliferato r-activated receptor gamma coactivator-1-alpha(SIRT1/P Gc-1α),SIRT

关键词： hearing loss hypoxia microRNAs oxidative stress sensorineural

Status and prospects for symmetric organic redox flow batteries

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Journal of Energy chemistry 2025年第1期100卷 125-143页

作者： Md Al Raihan c.Adam Dyker Department of chemistry University of New Brunswick

As environmental concerns from fossil fuel consumption intensify, large-scale energy storage becomes imperative for the integration of renewable sources like wind, hydro, and solar with the electrical *** flow batteries, particularly those employing organic molecules, are positioned as a key technology for this purpose. This review explores the growing field of symmetric organic redox flow batteries(ORFBs) within this context. Unlike traditional asymmetric designs based on unique active materials for each electrode, symmetric ORFBs involve a single bipolar species for both electrodes. This review highlights the benefits of a symmetric design, and categorizes five distinct classes of organic bipolar molecules used in both aqueous and non-aqueous solvents. By providing a comprehensive overview of their cell cycling and performance characteristics, the strengths and weaknesses of the diverse categories of bipolar molecules are highlighted for both solvent systems, as are opportunities for future development. This should guide new research directions and advance the development of practical symmetric ORFBs.

关键词： Redox flow battery Symmetric battery Organic battery Aqueous electrolyte Non-aqueous electrolyte

Multiple sclerosis is at a checkpoint: advancing the program

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Neural Regeneration Research 2025年第3期20卷 811-812页

作者： Brandon c.Smith Jessica L.Williams Department of Neurosciences Lerner Research InstituteCleveland ClinicClevelandOHUSA Department of Biological Geologicaland Environmental SciencesCleveland State UniversityClevelandOHUSA

Multiple sclerosis(MS) is a chronic inflammatory and demyelinating disease of the central nervous system(cNS). Patients with MS experience sensory and motor function loss due to myelin and/or axon damage perpetuated b... 详细信息

关键词： Hauser sclerosis damage

Meteorological drought features in northern and northwestern parts of Mexico under different climate change scenarios

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Journal of Arid Land 2017年第1期9卷 65-75页

作者： carlos EScALANTE-SANDOVAL Pedro nunez-GARcIA Faculty of Engineering National Autonomous University of Mexico Cd. Universitaria Coyoacan 04510 Mexico

Meteorological drought has been an inevitable natural disaster throughout Mexican history and the northern and northwestern parts of Mexico（i.e., the studied area）, where the mean annual precipitation（MAP） is less than 500 mm, have suffered even more from droughts in the past. The aim of this study was to conduct a meteorological drought analysis of the available MAP data（1950–2013） from 649 meteorological stations selected from the studied area and to predict the drought features under the different IPcc-prescribed climate change scenarios. To determine the long-term drought features, we collected 1×10~4 synthetic samples using the periodic autoregressive moving average（PARMA） model for each rainfall series. The simulations first consider the present prevailing precipitation conditions（i.e., the average from 1950 to 2013） and then the precipitation anomalies under IPcc-prescribed RcP 4.5 scenario and RcP 8.5 scenario. The results indicated that the climate changes under the prescribed scenarios would significantly increase the duration and intensity of droughts. The most severe impacts may occur in the central plateau and in the Baja california Peninsula. Thus, it will be necessary to establish adequate protective measures for the sustainable management of water resources in these regions.

关键词： meteorological drought synthetic simulation climate change water stress evapotranspiration

Ultra‑Transparent and Multifunctional IZVO Mesh Electrodes for Next‑Generation Flexible Optoelectronics

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Nano-Micro Letters 2025年第1期17卷 293-309页

作者： Kiran A.Nirmal Tukaram D.Dongale Atul c.Khot chenjie Yao Nahyun Kim Tae Geun Kim School of Electrical Engineering Korea UniversityAnam‑ro 145Seongbuk‑guSeoulRepublic of Korea computational Electronics and Nanoscience Research Laboratory School of Nanoscience and BiotechnologyShivaji UniversityKolhapur 416004India

Mechanically durable transparent electrodes are essential for achieving long-term stability in flexible optoelectronic ***,they are crucial for applications in the fields of energy,display,healthcare,and soft *** meshes represent a promising alternative to traditional,brittle,metal oxide conductors due to their high electrical conductivity,optical transparency,and enhanced mechanical *** this paper,we present a simple method for fabricating an ultra-transparent conducting metal oxide mesh electrode using selfcracking-assisted *** this method,we produced an electrode with ultra-transparency(97.39%),high conductance(Rs=21.24Ωsq^(−1)),elevated work function(5.16 eV),and good mechanical *** also evaluated the effectiveness of the fabricated electrodes by integrating them into organic photovoltaics,organic light-emitting diodes,and flexible transparent memristor devices for neuromorphic computing,resulting in exceptional device *** addition,the unique porous structure of the vanadium-doped indium zinc oxide mesh electrodes provided excellent flexibility,rendering them a promising option for application in flexible optoelectronics.

关键词： Self-cracking template Vanadium-doped indium zinc oxide mesh Organic solar cells Organic light-emitting diodes Flexible transparent memory

New pharmacological tools:the use of diterpenes to promote adult hippocampal neurogenesis

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Neural Regeneration Research 2024年第8期19卷 1629-1630页

作者： Ricardo Gomez-Oliva Pedro nunez-Abades carmen castro Department of Biomedicine Biotechnology and Public HealthDivision of PhysiologyUniversity of CadizCadizSpain Biomedical Research and Innovation Institute of cadiz(INiBIcA) CadizSpain Department of Physiology University of SevilleSevilleSpain

Tissue regeneration maintains homeostasis and preserves the functional features of each ***,not all tissues show a strong repairing *** is the case of the central nervous *** is now well established that the generation of new functional neurons from stem cells in the adult brain occurs in specific regions of the brain of different species such as rodents,birds,primates,and humans(Eriksson et al.,1998).

关键词： capacity maintain preserve