Results 41 to 50 of about 2,138 (160)

外源锌对水稻植株镉的累积差异分析

open access: yesShuitu Baochi Xuebao, 2018
通过水稻威优46盆栽种植试验,研究了外源Zn施用(0,40,80,160 mg/kg 4个水平)对Cd中度(0.72 mg/kg)和重度(5.26 mg/kg)污染土壤中Cd生物有效性及水稻Cd累积的差异。结果表明:施Zn对各检测指标存在影响,但土壤Cd总量仍是土壤Cd活性和水稻Cd累积差异变动的主控因素。在Cd中度污染土壤中,施Zn降低了土壤交换态Cd含量1.9%~17.0%,但水稻根表铁膜、根和糙米中Cd含量随Zn施用浓度的增大而增大,糙米Cd含量从0.09 mg/kg上升到0.17 mg/kg ...
辜娇峰   +5 more
doaj  

“Agro é tech, agro é pop, agro é tudo”?

open access: yesRevista Tamoios
O objetivo deste artigo é apresentar um panorama dos conflitos pela água produzidos e intensificados pelo agronegócio em Minas Gerais entre os anos de 2002 e 2022, a partir do aporte teórico-metodológico da Ecologia Política. Para tanto, foi desenvolvida uma pesquisa qualitativa, de caráter descritivo.
José Vitor Palhares dos Santos   +2 more
openaire   +1 more source

Synergistic Engineering of Amorphous Cathode and Hybrid Electrolyte Toward Stable High‐Voltage Aqueous Zn‐Ion Batteries

open access: yesRare Metals, Volume 45, Issue 5, May 2026.
ABSTRACT The development of high‐voltage aqueous zinc‐ion batteries (AZIBs) is primarily hindered by the lack of suitable cathode materials and electrolytes that can work in broad voltage windows. Herein, we propose a synergistic strategy that concurrently addresses these challenges through the integration of an amorphous vanadium oxyphosphate/graphene
Xianyu Liu   +7 more
wiley   +1 more source

SE É FUTEBOL, É MASCULINO?

open access: yesSociologias Plurais, 2012
Comumente, em referência a atletas de futebol, evoca-se uma masculinidade tradicional (BONINO, 2008), definida como modelo social hegemônico. No presente artigo, refletir-se-á sobre a chamada "área reservada masculina" (MAGUIRE & DUNNING, 1997), considerada como relevante à manutenção das estruturas patriarcais. A partir de coberturas jornalísticas
openaire   +2 more sources

Template‐Assisted Construction of Atomically Dispersed Fe‐N‐C Catalysts With Dense Fe‐N4C Sites for Enhanced Oxygen Reduction Reaction

open access: yesRare Metals, Volume 45, Issue 5, May 2026.
ABSTRACT Atomically dispersed iron–nitrogen–carbon (Fe‐N‐C) catalysts have emerged as promising alternatives for oxygen reduction reaction (ORR) owing to their highly atomic utilization. However, maintaining both Fe atomic dispersion and dense Fe‐Nx sites (typically below 2 wt%) in Fe‐N‐C catalysts is still a key challenge.
Lijuan Wang   +6 more
wiley   +1 more source

水分淋洗下菜园土壤各形态锌的迁移转化特征

open access: yesShuitu Baochi Xuebao, 2006
采用室内模拟降雨淋溶土柱的方法,研究了经过1年降雨的淋溶后,菜园土壤垂直方向上各形态锌的迁移转化规律。结果表明:锌的大多数形态很难随水分运动发生迁移,~年的降雨至多能使占总量0.57%的水溶态锌发生淋溶损失。水分淋洗和施磷锌平均能使分别占总量3%和4%的难溶态RES—Zn和OX-Zn向易被植物利用的EX—Zn、CABS—Zn和OM—Zn形态转化。随施锌量的增加,土壤锌的有效性指数增加30%~78%.有效锌总量增加3.12~10.07mg/kg。当施磷50mg/kg时,土壤Zn的有效性指数增加3%~28%,
于素华   +3 more
doaj  

Recent Advances in Piezocatalysis and Piezo‐Photocatalysis in Energy and Environment: Materials, Design, and Applications

open access: yesRare Metals, Volume 45, Issue 4, April 2026.
ABSTRACT Piezocatalytic technology utilizes mechanical strain or stress‐induced piezoelectric phenomena to produce robust internal electric fields, markedly improving the separation efficiency of e−‐h+ pairs. This method has emerged as a focal point in catalysis by removing reliance on conventional light or electrical energy via its mechanical‐to ...
Yue Zhou   +5 more
wiley   +1 more source

锌对前列腺癌PC-3M细胞侵袭能力的影响

open access: yesZhongguo shiyan zhenduanxue, 2009
目的探讨锌对人前列腺癌PC-3M细胞侵袭能力的影响。方法用MTT比色法检测不同剂量锌对PC-3M细胞增殖的影响;Transwell小室检测锌对PC-3M细胞侵袭能力的影响;RT-PCR检测锌作用24 h后MMP-2、MMP-9 mR-NA的表达;酶谱分析检测锌作用后PC-3M细胞MMP-2、MMP-9的活性变化。结果MTT检测结果表明一定剂量的锌可抑制PC-3M细胞的生长;Transwell小室实验结果显示,锌作用下PC-3M细胞穿透Matrigel膜的细胞数减少;RT-PCR结果显示锌抑制了PC ...
汲坤   +7 more
doaj  

A study on the absorption of cadmium and zinc in the water sediments with submerged plants(沉水植物对受重金属镉、锌污染的水体底泥的修复效果)

open access: yesZhejiang Daxue xuebao. Lixue ban, 2016
为了探究常见沉水植物对水体底泥中重金属污染的富集效果,选取浙江水域较为常见的3种沉水植物苦草(Vallisneria natans (Lour.) Hara)、黑藻(Hydrilla verticillata (Linn. f.) Royle)、金鱼藻(Ceratophyllum demersum L.),在模拟天然水体环境中,将3种沉水植物培养在含有重金属Cd、Zn的底泥中生长一个生活周期.依据沉水植物对重金属Cd、Zn的富集量和生物-沉积物生物富集因子(biota-sediment ...
QIAOYunlei(乔云蕾)   +4 more
doaj   +1 more source

NÃO É IDEOLOGIA, É LEI

open access: yesDiversidade e Educação
O artigo tem como objetivo fornecer subsídios legais para os/as educadores/as enfrentarem os desafios impostos por um contexto sociopolítico reacionário, promovendo práticas pedagógicas que valorizem a diversidade, os direitos humanos e a igualdade de gênero na escola.
Gabriela Bieger Reyes   +2 more
openaire   +1 more source

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