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科研人员揭示从小分子生成多环芳香烃（PAHs）的形成机理（图）
小分子 多环芳香烃 形成机理
2023/1/13
星际复杂有机分子，尤其是生命相关分子（如糖和氨基酸），可能最终被运送到早期地球，从而逐渐演化为生命（图1）。因此，对星际复杂有机分子形成机理的研究，是解开宇宙生命起源之谜的核心课题。近年来，随着国内外射电天文望远镜灵敏度的大幅提高，星际空间中越来越多的复杂有机分子被探测到，包括多环芳香烃（PAHs）。然而，观测到的PAHs在星际空间中如何起源，长久以来都没有定论。
Ultrasonic wave extraction and simultaneous analysis of polycyclic aromatic hydrocarbons (PAHs) and phthalic esters in soil
Polycyclic aromatic hydrocarbons Phthalic Acid Esters Ultrasonic assistant extraction technique
2018/3/23
A method is developed for detection of polycyclic aromatic hydrocarbons (PAHs) and Phthalic Acid Esters (PAEs) in soil samples. Ultrasonic Wave Extraction under airtight circumstances is adopted to ex...
Persistent Organic Pollutants (POPs),Polycyclic Aromatic Hydrocarbons (PAHs),and Plastics:Examples of the Status, Trend,and Cycling of Organic Chemicals of Environmental Concern in the Ocean
Persistent Organic Pollutants (POPs) Polycyclic Aromatic Hydrocarbons (PAHs) Plastics:Examples of the Status Trend Cycling Organic Chemicals Environmental Concern in the Ocean
2015/7/17
Four decades of research have provided a reasonable understanding of the outline of the biogeochemical cycles of persistent organic pollutants (POPs) and polycyclic aromatic hydrocarbons (PAHs) in coa...
The sorption and desorption of phenanthrene and pyrene on treated and untreated aspen wood fibers were studied to evaluate the sorption mechanisms of polycyclic aromatic hydrocarbons (PAHs). Those sam...
多环芳烃(PAHs)是持久性有机污染物(POP)之一, 通过大气沉降和污水灌溉能被植物吸收, 对食品生产安全和人类生命健康具有极大威胁。为探究PAHs对蔬菜作物的生长影响及毒害机理, 采用盆栽试验研究了不同浓度的荧蒽(FLU)和苯并[a]芘(B[a]P)单独胁迫下对油菜(Brassica chinensis)生长、生理和品质的影响及在油菜茎叶内的积累。结果表明: FLU和B[a]P在油菜茎叶内的积...
Seasonal Variation and Sources of Polycyclic Aromatic Hydrocarbons (PAHs) in Indoor and Outdoor Air in a Semi Arid Tract of Northern India
Indoor and outdoor air Gas/Particulate PAHs Seasonality Toxic assessment Source apportionment
2016/3/25
PAHs concentration in particulate and gas phase was investigated in indoor and outdoor air of urban residential and
roadside homes in a semiarid region of India. Samples were collected during winter ...
Spitzer Mapping of PAHs and H2 in Photodissociation Regions
Galaxy Astrophysics (astro-ph.GA)
2010/12/22
The mid-infrared (MIR) spectra of dense photodissociation regions (PDRs) are typically dominated by emission from polycyclic aromatic hydrocarbons (PAHs) and the lowest pure rotational states of molec...
Size-distributions of n-alkanes, PAHs and hopanes and their sources in the urban, mountain and marine atmospheres over East Asia
n-alkanes PAHs hopanes marine atmospheres East Asia
2009/12/3
Size-segregated (9 stages) n-alkanes, polycyclic aromatic hydrocarbons (PAHs) and hopanes in the urban (Baoji city in inland China), mountain (Mt. Tai in east coastal China) and marine (Okinawa Island...
Polycyclic aromatic hydrocarbons (PAHs) in Norwegian and Russian Arctic marine sediments:concentrations,geographical distribution and sources
Polycyclic aromatic hydrocarbons Norwegian Russian Arctic marine sediments
2009/12/3
Polycyclic aromatic hydrocarbons (PAHs) are key contaminants of concern under the Arctic Environmental Monitoring Programme (AMAP) due to their carcinogenic potential. The concentration of the differe...
Source apportionment of elevated wintertime PAHs by compound-specific radiocarbon analysis
elevated wintertime PAHs compound-specific radiocarbon
2009/6/2
Natural abundance radiocarbon analysis facilitates distinct source apportionment between contemporary biomass/biofuel (14C "alive") versus fossil fuel (14C "dead") combustion. Here, the first compound...
Polycyclic aromatic hydrocarbons（PAHs）in the atmospheres of two French alpine valleys: sources and temporal patterns
Polycyclic aromatic hydrocarbons PAHs French alpine valleys
2009/3/3
Alpine valleys represent some of the most important crossroads for international heavy-duty traffic in Europe, but the full impact of this traffic on air quality is not known due to a lack of data con...
藻类对多环芳香烃(PAHs)的富集和代谢
多环芳香烃(PAHs) 生物富集 代谢 藻类
2008/12/15
概述了藻类对PAHs的富集和代谢的研究进展.环境中多环芳香烃(PAHs)的污染能导致严重的健康问题,利用生物特别是微生物去除污染环境中的PAHs是一项新的技术.藻类对PAHs 的富集与有机污染物的类型、藻类的种类及藻类的生物量有关,活细胞和死细胞对PAHs均有富集能力.还阐述了PAHs 在真菌、细菌和藻类体内代谢的途径以及代谢过程中起关键作用的酶,PAHs 在藻类中的代谢途径和细菌及真菌都不同,谷...
Source apportionment of the particulate PAHs at Seoul, Korea: impact of long range transport to a megacity
particulate PAHs Seoul Korea transport megacity
2008/11/12
Northeast Asia including China, Korea, and Japan is one of the world's largest fossil fuel consumption regions. Seoul, Korea, is a megacity in Northeast Asia. Its emissions of air pollutants can affec...
Characteristics of PAHs in Particulates in the Atmospheric Environment of Hat Yai City, Thailand, and Relationship with Rubberwood Burning in Rubber Sheet Production
PAHs Size distribution Wood burning Rubber-wood Rubber sheet
2016/3/29
Natural rubber is a main commodity of Thailand, half of which is formed into ribbed smoked sheets
(RSS). Fuel wood is burned during RSS production to heat and dry the rubber sheets. Smoke from the
b...
天津地区表土PAHs含量的多尺度空间相关性
2007/8/24
本文应用因子克立格分析方法，分析了天津表土16种PAHs之间多尺度空间结构特征。分析结果显示，天津表土PAHs在空间上可以划分三种尺度：块金尺度（0－5km），小空间尺度（5－10km）和大空间尺度（10－50km）。在不同的空间尺度上，16种PAHs之间表现出不同的空间相关性，具有空间尺度相关性。这种空间尺度相关性，是由于不同的空间污染过程造成的，有助于下一步的多尺度空间...