检索结果-南通市图书馆

Adsorption behavior of imidacloprid pesticide on polar microplastics under environmental conditions:critical role of photo-aging

引用

Frontiers of Environmental Science & Engineering 2023年第4期17卷 13-26页

作者： Weiyi Liu Ting Pan Hang Liu Mengyun Jiang Tingting Zhang Department of Environmental Science and Engineering Research Centre for Resource and EnvironmentBeijing University of Chemical TechnologyBeijing 100029China

The photo-aging behavior of microplastics(MPs)in natural environment has become a global *** ultraviolet radiation has enough energy to change the polymer structure and physicalchemical properties of *** attention has focused on the interactions of the photo-aged polar and biodegradable MPs with organic *** work investigated the structural properties of aged polar polyamide(PA)MPs and biodegradable polylactic acid(PLA)MPs exposed to ultraviolet irradiation and their adsorption behavior and mechanism for neonicotinoid insecticide imidacloprid(IMI).The results showed that the MPs had extensive changes in surface morphology and chemical properties after *** C–N bond of PA MPs was disrupted to form more carbonyl *** oxygen-containing functional groups on the surface of aged PLA MPs were broken and generated relatively smaller *** adsorption capacity of IMI on PA MPs decreased by 19.2%,while the adsorption capacity of IMI on PLA MPs increased by 41.2%after *** depended on the natural structure of the MPs and their ability to absorb ultraviolet *** electrostatic interactions,hydrogen bonds,van der Waals interactions,and polar-polar interactions were the main adsorption mechanisms of IMI on *** initial solution pH and low ionic strength favored the adsorption of IMI by altering charge distribution on the MPs *** formation of the humic acid-IMI complexes decreased the concentration of IMI in the water phase and further decreased the adsorption on *** results are enlightening for a scientific comprehension of the environmental behavior of the polar MPs.

关键词： Microplastics Neonicotinoid insecticide photo-aging adsorption Environmental conditions

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Evaluation of the Safety and Efficacy of a Novel Home-Use Device with Diode Arrays and Contact Heating for Facial Skin Rejuvenation

引用

Journal of Cosmetics, Dermatological Sciences and Applications 2011年第4期1卷 119-124页

作者： J. Shaoul R. S. Mulholland 不详

Background: phototherapy of photoaged skin has been attempted by lasers or intense pulsed light at the visible or near-infrared part of the spectrum. The use of red Light-Emitting Diodes (LED) delivering a low dose energy to the skin has been described for office and home use. Methods: In the present study, a portable home-use device is presented that combines fractional non-thermal red LED with mild contact heating. Forty subjects aged 30 - 55 presenting with facial lax skin, large pores, fine lines, wrinkles and brown pigmentation received 8 bi-weekly treatments for 4 weeks, using the Silk’n Reju/FaceFX device (Home Skinovations, Yokneam, Israel). Skin condition was evaluated before and 1, 2, and 3 months following the last treatment session. Grading of outcome was done according to an independent blinded evaluator and patient satisfaction. Results: Facial skin improvement of wrinkling and skin texture were apparent immediately and scored clinically after 3 months as excellent and considerable by >90% of patients. Pigmentation improvement was less apparent. Overall facial skin improvement was noted by 77% of patients. Conclusions: The combination of fractional red LED and mild contact heating, using an at home portable device, proved to be safe and effective method to improve the quality of photoaged skin.

关键词： LED Home-Use photo-aging Anti-aging

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Birch Sap (Betula alba) and Chaga Mushroom (Inonotus obliquus) Extracts Show Anti-Oxidant, Anti-Inflammatory and DNA Protection/Repair Activity In Vitro

引用

Journal of Cosmetics, Dermatological Sciences and Applications 2019年第2期9卷 188-205页

作者： Mohamed Softa Giuseppe Percoco Elian Lati Pauline Bony INDERMA Dermatological Laboratory Ivry sur SeineFrance BIO-EC Laboratory LongjumeauFrance

OBJECTIVE: The skin interacts strictly with the surrounding environment. Despite an efficient system of protection, its integrity is continuously assaulted by a massive group of external stresses. UV irradiations represent one of the most harmful factors for the cutaneous tissue. Both UV-A and UV-B can induce deep modifications of the different layers of the skin, including a weakening of its barrier function properties, DNA damages and degradation of the extracellular matrix. The aim of this project was to assess the UV protection activity of two natural compounds, the birch sap from Betula alba and organic extract from Inonotus obliquus (chaga mushroom) used separately or in a complex. METHODS: The anti-oxidant (ROS and MDA quantification, catalase and SOD activity measurement), anti-inflammatory (IL-1β, IL-6, IL-8, IL-10, TNF-α and INF-γ dosages) and the DNA protection/repair activities (DNA lesion site analysis) of birch sap and chaga mushroom extracts tested separately or in a complex containing organic birch sap 5% and Inonotus obliquus extracts 2% were evaluated in vitro after exposure of cultured keratinocytes and fibroblasts or reconstructed epidermis to UV-A/UV-B irradiations. RESULTS: We observed that birch sap from Betula alba and extracts from Inonotus obliquus prevent the formation of ROS and decrease the oxidative stress induced under UV irradiations, suggesting a strong anti-oxidant activity. In addition, the tested products showed an immunomodulatory effect by reducing the quantity of pro-inflammatory cytokines upon UV irradiations. UV-induced DNA damages of keratinocytes were also reduced by birch sap and chaga mushroom extracts. CONCLUSION: Here, for the first time, we have shown the photo-protection activity of extracts obtained from Betula alba and Inonotus obliquus mushroom on skin cells exposed to UV-A and UV-B irradiations. Due to their anti-oxidant, anti-inflammatory and DNA protection/repair activities, the tested products represent promisi

关键词： Birch Sap Chaga Mushroom UV Irradiations Oxidative Stress photo-aging Natural Compounds

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：