Bioaccumulation and phytotoxicity of ZnO nanoparticles in soil-grown Brassica chinensis L. and potential risks

2022 ◽  
Vol 306 ◽  
pp. 114454
Author(s):  
Meimei Shen ◽  
Weitao Liu ◽  
Aurang Zeb ◽  
Jiapan Lian ◽  
Jiani Wu ◽  
...  
2021 ◽  
Author(s):  
Meimei Shen ◽  
Weitao Liu ◽  
Aurang Zeb ◽  
Jiapan Lian ◽  
Xiji Hu ◽  
...  

Abstract A pot-culture experiment was carried out to explore the phytotoxicity and accumulation of ZnO nanoparticles (ZnO NPs) in pakchoi (Brassica chinensis), as well as its potential risk. Zn was mainly accumulated in the shoots of pakchoi and showed the order of cell wall fraction > soluble fraction > organelles fraction. Endosomes were observed in roots cell by transmission electron microscope (TEM) and it is proving that endocytosis is a possible way for NPs to enter the cells. The results showed that higher concentration of ZnO NPs treatments resulted in an increase in the content of photosynthetic pigments and malondialdehyde (MDA), Catalase (CAT) and ascorbate peroxidase (APX) activity, while the activity of superoxide dismutase (SOD) and guaiacol peroxidase (G-POD) decreased significantly compared with the control. These changes suggest that the mechanism of ZnO NPs phytotoxicity may induce strongly oxidative stress and damage biomembrane. Generally, ZnO NPs had a similar impact on the growth and absorption of Zn in pakchoi with Zn2+. Simultaneously, the treatment of ZnO NPs affected the nutritional quality and food safety of pakchoi at high concentration.


2016 ◽  
Vol 317 ◽  
pp. 312-318 ◽  
Author(s):  
Soo-kyung Jeon ◽  
Eun-ju Kim ◽  
Jaesang Lee ◽  
Seunghak Lee

2014 ◽  
Vol 21 (1) ◽  
pp. 15-23 ◽  
Author(s):  
Helen Pryce ◽  
Amanda Hall

Shared decision-making (SDM), a component of patient-centered care, is the process in which the clinician and patient both participate in decision-making about treatment; information is shared between the parties and both agree with the decision. Shared decision-making is appropriate for health care conditions in which there is more than one evidence-based treatment or management option that have different benefits and risks. The patient's involvement ensures that the decisions regarding treatment are sensitive to the patient's values and preferences. Audiologic rehabilitation requires substantial behavior changes on the part of patients and includes benefits to their communication as well as compromises and potential risks. This article identifies the importance of shared decision-making in audiologic rehabilitation and the changes required to implement it effectively.


2011 ◽  
Vol 42 (4) ◽  
pp. 32
Author(s):  
ELIZABETH MECHCATIE
Keyword(s):  

2020 ◽  
pp. 7-9

Examination of (35) samples of spices obtained from local markets for the purposes of isolating and diagnosing fungi growing on them. Anine isolates belonging to 13 different types of fungi were diagnosed by the standard dilution method with three replications, and it has been observed that the most samples from which the fungi were isolated is ginger. It was found that the most isolated species of fungi are Penicillium, Aspergillus, and Rizupes spp. A rare colony of fungi was observed, which indicates contamination of the spices under study with the fungus. The present study aims to identify the potential risks of the presence of fungi in spices and what may result from mycotoxins that may be the cause of many chronic diseases as a result of using these spices in large quantities. The study recommends limiting the use of contaminated spices, especially ginger, in preparing food and its uses, in addition to other types such as cloves, black and white pepper, and other types of spices found in the local markets, especially the expired ones.


2020 ◽  
Vol 10 (1) ◽  
pp. 66-69
Author(s):  
Natalia Zhavoronkova ◽  
Vyacheslav Agafonov

The article is devoted to the study of modern theoretical and legal problems of ensuring biological security in the Arctic zone of the Russian Federation. The published Draft of Federal law No. 850485-7“On biological security of the Russian Federation”provides an opportunity to take a closer look at the problem of legal provision of biological security in relation to the most vulnerable ecosystems, and, first of all, the Arctic. The article considers the most important features and potential risks of the Arctic zone of the Russian Federation of critical importance from the point of view of biological hazards, the features (specificity) of biological safety problems from the point of view of organizational-legal features and, in particular, from the perspective of environmental law. It is proved that, given the special situation of the Arctic zone of the Russian Federation, in addition to the base Federal law“About biological safety” required a specific law on biological and ecological safety of the Arctic zone of the Russian Federation, which should be generated on a slightly different model than the draft Federal law «On biological safety”, to wear the most specific, applied nature.


MRS Advances ◽  
2020 ◽  
Vol 5 (61) ◽  
pp. 3153-3161
Author(s):  
Marco Antonio Juárez Sánchez ◽  
Miguel Ángel Meléndez Lira ◽  
Celestino Odín Rodríguez Nava

AbstractDrug contamination in water is one of the current fields of study. Since 1990, the presence of drugs in drinking water has been a concern to scientists and public. In Mexico, these organic compounds are not efficiently removed in wastewater treatment plants; therefore, alternative methodologies have been studied that allow these compounds to have a high percentage of degradation or be completely degraded. One example of these techniques is heterogeneous photocatalysis which has obtained positive results in the degradation of drugs using ZnO nanoparticles. These are commonly selected for their electrical characteristics, even though they disperse in water and an additional unit operation is required to separate them from the liquid medium. To eliminate drugs with nano particles in a single stage, polycaprolactone-based membranes with adhered ZnO nanoparticles, by means of electrospinning, were prepared to degrade drugs such as diclofenac. The technique used has shown to efficiently break down diclofenac in 4 hours according to the capillary electrophoresis readings.


2018 ◽  
Vol 12 (2) ◽  
pp. 163-178
Author(s):  
Kayla Wheeler

For scholars, the internet provides a space to study diverse groups of people across the world and can be a useful way to bypass physical gender segregation and travel constraints. Despite the potential for new insights into people’s everyday life and increased attention from scholars, there is no standard set of ethics for conducting virtual ethnography on visually based platforms, like YouTube and Instagram. While publicly accessible social media posts are often understood to be a part of the public domain and thus do not require a researcher to obtain a user’s consent before publishing data, caution must be taken when studying members of a vulnerable community, especially those who have a history of surveillance, like African-American Muslims. Using a womanist approach, the author provides recommendations for studying vulnerable religious groups online, based on a case study of a YouTube channel, Muslimah2Muslimah, operated by two African-American Muslim women. The article provides an important contribution to the field of media studies because the author discusses a “dead” online community, where users no longer comment on the videos and do not maintain their own profiles, making obtaining consent difficult and the potential risks of revealing information to an unknown community hard to gauge.


Sign in / Sign up

Export Citation Format

Share Document