相关实验视频
Updated: Jan 23, 2026

08:22
Studying Copper Nanoparticle-Induced Programmed Cell Death in Bacteria
Published on: May 16, 2025
552
淡水沉积物中的铜和基纳米颗粒:时空趋势和环境影响
Mavro Lučić1, Janja Vidmar2, Radmila Milačič Ščančar2
1Division for Marine and Environmental Research, Ruder Bošković Institute, Bijenička cesta 54, Zagreb, Croatia; Department of Environmental Sciences, Jožef Stefan Institute, Jamova 39, Ljubljana, Slovenia.
Environmental research
|January 21, 2026
概括
在克罗地亚河流和湖泊沉积物中量化了金属纳米粒子 (MNP). 发现了铜 (Cu) 和 (Pb) 的NP,农业和采矿活动被确定为主要来源,构成生态风险.
科学领域:
- 环境科学 环境科学
- 分析化学 分析化学
- 生态毒理学 生态毒理学
背景情况:
- 人为金属纳米粒子 (MNP) 对水生生态系统构成风险.
- 在沉积物中量化MNP在分析上具有挑战性.
- 了解MNP分布对于环境风险评估至关重要.
研究的目的:
- 为了确定克罗地亚淡水沉积物中铜 (Cu) 和 (Pb) NP 的大小,质量和数量度.
- 调查这些NP的空间和时间分布.
- 确定MNP的来源并评估其潜在的生态风险.
主要方法:
- 单颗粒感应合等离子体质谱法 (sp-ICP-MS) 用于量化.
- 31个河流和湖泊沉积物样本在三年内被分析.
- 混合效应模型被用来分析空间和时间模式.
主要成果:
- 在不同的水域中检测到Cu NPs (26.8-46.0 nm) 和Pb NPs (19.1-26.4 nm).
- 数量度范围为1.49×108到1.06×1010粒子/g的Cu和1.42×108到7.63×1010粒子/g的Pb.
- 空间异质性占主导地位,采集区因素解释了72-91%的变异;农业用地显示出高生物可用性Cu NP.
结论:
- 农业活动是CuNP的重要来源,而采矿和工业贡献了PbNP.
- 高度的PbNP形成了一个持久的污染水库.
- 该研究为评估淡水沉积物中MNP环境风险提供了必要的数据.
相关概念视频
Current Trends in Nursing I
5.3K
Current trends in nursing include:
5.3K
Current Trends in Nursing II
3.4K
Trends in nursing are multifactorial and associated with changes in society, within the nursing profession, and in other professions. Notably, telehealth and remote nursing contribute to successful healthcare delivery for numerous patients and help reduce stress for nurses due to nursing shortages. Nurses can reach patients, monitor their conditions, and interact with them using computers, audio, visual accessories, and telephones—for example, remote patient monitoring systems. Likewise,...
3.4K
Issues And Trends In Healthcare Delivery System
6.2K
The issues and trends in healthcare delivery are constantly changing. The COVID-19 pandemic is one recent issue that wreaked havoc on healthcare systems, causing a shortage of healthcare workers, high demand for medicines and supplies, and increased medical expenditure due to a lack of insurance. Other issues include rising healthcare costs and care fragmentation.
Cost Containment
Payment for healthcare services has historically promoted adoption of costly and often unnecessary or inefficient...
Cost Containment
Payment for healthcare services has historically promoted adoption of costly and often unnecessary or inefficient...
6.2K
Impact of Groups on Groups
236
Social psychologists analyze how groups influence one another, shaping social structures and interactions through both cooperation and competition. These dynamics manifest in various ways, ranging from economic partnerships to intergroup conflicts that shape societal structures and perceptions.Cooperation and Competition in Intergroup RelationsIntergroup relationships vary across contexts, sometimes fostering cooperation and mutual benefit while at other times leading to conflict and...
236
Trends in Lattice Energy: Ion Size and Charge
26.6K
An ionic compound is stable because of the electrostatic attraction between its positive and negative ions. The lattice energy of a compound is a measure of the strength of this attraction. The lattice energy (ΔHlattice) of an ionic compound is defined as the energy required to separate one mole of the solid into its component gaseous ions. For the ionic solid sodium chloride, the lattice energy is the enthalpy change of the process:
26.6K
Impact
483
Impact occurs when two bodies collide, leading to the application of impulsive forces between them. Analyzing impact mechanics involves considering two colliding particles moving along a line known as the line of impact, which passes through their centers and is perpendicular to the contact plane.
When particles with different initial velocities collide, they induce deformation by applying equal and opposite impulses. At the point of maximum deformation, the particles move together with...
When particles with different initial velocities collide, they induce deformation by applying equal and opposite impulses. At the point of maximum deformation, the particles move together with...
483

