Responses of Ceriodaphnia dubia to TiO2 and Al2O3 nanoparticles: A dynamic nano-toxicity assessment of energy budget distribution

Li, Minghua; Czymmek, Kirk J.; Huang, Chin‐Pao

doi:10.1016/j.jhazmat.2011.01.061

Cited by 55 publications

(15 citation statements)

References 26 publications

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“…** denotes P < 0.01, * denotes p < 0.05, n ¼ 8. This result supported the previous studies [17][18][19][20] of increased production of O 2 Ã and OH* by the photocatalytic reaction of titanium oxide in animal cell. In recent years, much research has been done by laser devices in the field of skin rejuvenation.…”

Section: Free Radical Generation By Tp Fiber Andsupporting

confidence: 92%

High temperature heat source generation with quasi-continuous wave semiconductor lasers at power levels of 6 W for medical use

et al. 2014

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Abstract. We investigate a technology to create a high temperature heat source on the tip surface of the glass fiber proposed for medical surgery applications. Using 4 to 6 W power level semiconductor lasers at a wavelength of 980 nm, a laser coupled fiber tip was preprocessed to contain a certain amount of titanium oxide powder with a depth of 100 μm from the tip surface so that the irradiated low laser energy could be perfectly absorbed to be transferred to thermal energy. Thus, the laser treatment can be performed without suffering from any optical characteristic of the material. A semiconductor laser was operated quasi-continuous wave mode pulse time duration of 180 ms and >95% of the laser energy was converted to thermal energy in the fiber tip. Based on two-color thermometry, by using a gated optical multichannel analyzer with a 0.25 m spectrometer in visible wavelength region, the temperature of the fiber tip was analyzed. The temperature of the heat source was measured to be in excess 3100 K. © The Authors. Published by SPIE under a Creative Commons Attribution 3.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI.

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Section: Free Radical Generation By Tp Fiber Andsupporting

confidence: 92%

High temperature heat source generation with quasi-continuous wave semiconductor lasers at power levels of 6 W for medical use

et al. 2014

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“…The disruption in metabolic processes likely mirror the organisms elevated need for energy coping with the stress situation. Disruption of energy homeostasis causing depleted lipid reserves is directly related to reduced growth in Daphnia, [45][46][47] which is a common adverse effect of metals. 48 In our study, growth reduction occurred already after two days resulting in a reduced juvenile growth rate and delayed age at maturity, both stronger affected in the equi-effective mixture.…”

Section: Discussionmentioning

confidence: 99%

Mixtures of Aluminum and Indium Induce More than Additive Phenotypic and Toxicogenomic Responses in Daphnia magna

Brun

Fields

Horsfield

et al. 2019

Environ. Sci. Technol.

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Aquatic systems are contaminated by many metals but their effects as mixtures on organisms are not well understood. Here, we assessed effects of aluminum with fairly well-known modes of actions and indium, an understudied emerging contaminant from electronics, followed by studying equi-effective mixtures thereof. We report acute and adverse phenotypic effects in Daphnia magna adults and global transcriptomic effects employing RNA sequencing in neonates. The mixture induced more than additive activity in mortality, and in physiological effects, including growth and reproduction. Similarly, transcriptomic effects were more than additive, as indicated by a markedly higher number of 463 differentially expressed transcripts in the mixture and by distinct classes of genes assigned to several biological functions, including metabolic processes, suggesting depleted energy reserves, which may be responsible for the observed impaired reproduction and growth. A gene set enrichment analysis (GSEA) of a priori known response pathways for aluminum confirmed activation of distinct molecular pathways by indium. Our study is highlighting more than additive effects at the transcriptional and physiological level and is providing a state-of-the art approach to mixture analysis, which is important for risk assessment of these metals and metal mixtures.

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“…In the present study, reduced AE probably is caused by the decreased CR under nano-TiO 2 exposure. NPs can attach to algal cells and form clusters, which can settle readily, resulting in a large decline of the algal concentration565758. Hereby, the intake of algal cells was subsequently impaired.…”

Section: Discussionmentioning

confidence: 99%

CO2-induced pH reduction increases physiological toxicity of nano-TiO2 in the mussel Mytilus coruscus

Lin

Shang

et al. 2017

Sci Rep

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The increasing usage of nanoparticles has caused their considerable release into the aquatic environment. Meanwhile, anthropogenic CO2 emissions have caused a reduction of seawater pH. However, their combined effects on marine species have not been experimentally evaluated. This study estimated the physiological toxicity of nano-TiO2 in the mussel Mytilus coruscus under high pCO2 (2500–2600 μatm). We found that respiration rate (RR), food absorption efficiency (AE), clearance rate (CR), scope for growth (SFG) and O:N ratio were significantly reduced by nano-TiO2, whereas faecal organic weight rate and ammonia excretion rate (ER) were increased under nano-TiO2 conditions. High pCO2 exerted lower effects on CR, RR, ER and O:N ratio than nano-TiO2. Despite this, significant interactions of CO2-induced pH change and nano-TiO2 were found in RR, ER and O:N ratio. PCA showed close relationships among most test parameters, i.e., RR, CR, AE, SFG and O:N ratio. The normal physiological responses were strongly correlated to a positive SFG with normal pH and no/low nano-TiO2 conditions. Our results indicate that physiological functions of M. coruscus are more severely impaired by the combination of nano-TiO2 and high pCO2.

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Responses of Ceriodaphnia dubia to TiO2 and Al2O3 nanoparticles: A dynamic nano-toxicity assessment of energy budget distribution

Cited by 55 publications

References 26 publications

High temperature heat source generation with quasi-continuous wave semiconductor lasers at power levels of 6 W for medical use

High temperature heat source generation with quasi-continuous wave semiconductor lasers at power levels of 6 W for medical use

Mixtures of Aluminum and Indium Induce More than Additive Phenotypic and Toxicogenomic Responses in Daphnia magna

CO2-induced pH reduction increases physiological toxicity of nano-TiO2 in the mussel Mytilus coruscus

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