Combined effects of water temperature and copper ion concentration on catalase activity in Crassostrea ariakensis

Alzheimer’s disease, a highly prevalent form of dementia, targets neuron function beginning from the hippocampal region and expanding outwards. Alzheimer’s disease is caused by elevated levels of heavy metals, such as lead, zinc, and copper. Copper is found in many areas of daily life, raising a concern as to how this metal and Alzheimer’s disease are related. Previous studies have not identified the common pathways between excess copper and Alzheimer’s disease etiology. Our review corroborates that both copper and Alzheimer’s disease target the hippocampus, cerebral cortex, cerebellum, and brainstem, affecting motor skills and critical thinking. Additionally, Aβ plaque formation was analyzed beginning from synthesis at the APP parent protein site until Aβ plaque formation was completed. Structural changes were also noted. Further analysis revealed a relationship between amyloid-beta plaques and copper ion concentration. As copper ion levels increased, it bound to the Aβ monomer, expediting the plaque formation process, and furthering neurodegeneration. These conclusions can be utilized in the medical community to further research on the etiology of Alzheimer’s disease and its relationships to copper and other metal-induced neurotoxicity.

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Combined Effects of Summer Water Temperature and Current Velocity on the Distribution of a Cold-Water-Adapted Sculpin (Cottus nozawae)

Water ◽

10.3390/w13070975 ◽

2021 ◽

Vol 13 (7) ◽

pp. 975

Author(s):

Kaiji Suzuki ◽

Nobuo Ishiyama ◽

Itsuro Koizumi ◽

Futoshi Nakamura

Keyword(s):

Water Temperature ◽

Climate Warming ◽

Current Velocity ◽

Cold Water ◽

Environmental Gradients ◽

Combined Effect ◽

Influential Factor ◽

Combined Effects ◽

River Catchment ◽

Water Abstraction

Clarifying the combined effects of water temperature and other environmental factors on the species distributions of cold-water fishes is the first step toward obtaining a better understanding of the complex impacts of climate warming on these species. In the present study, we examined the abundance and occurrence of the fluvial sculpin, Cottus nozawae, in response to water temperature along environmental gradients in northern Japan. The abundance survey was conducted in the Sorachi River catchment with two-pass electrofishing with a backpack electrofisher. For the occurrence survey, we carried out one-pass electrofishing in the Sorachi, Chitose, and Tokachi River catchments. Fish sampling was conducted once from July to August 2018 in the Sorachi River catchment, from May to June 2011 in the Chitose River catchment, and from July to September 2012 in the Tokachi River catchment. Generalized linear mixed models (GLMMs) and generalized linear models (GLMs) were used for the abundance and occurrence analyses, respectively. We found that the mean summer water temperature was the most influential factor on the distribution of C. nozawae; the abundance and occurrence were both negatively affected by increased water temperatures. In the occurrence model, occurrence probabilities of 0.9 and 0.5 for C. nozawae corresponded to mean summer temperatures of 12.0 and 16.1 °C, respectively. Furthermore, we identified a combined effect of water temperature and current velocity on the abundance of C. nozawae. The increased mean summer water temperature had a stronger negative effect on C. nozawae abundance under gentle flow conditions. While the precise mechanisms of this combined effect could not be determined in this study, stressors associated with low current velocities may increase their vulnerability to higher water temperatures. Our findings indicate that flow disturbances caused by human activities such as excessive water abstraction may exacerbate the negative impacts of climate warming on populations of C. nozawae in the future.

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Combined effect of tetracycline and copper ion on catalase activity of microorganisms during the biological phosphorus removal

Journal of Environmental Management ◽

10.1016/j.jenvman.2021.114218 ◽

2022 ◽

Vol 304 ◽

pp. 114218

Author(s):

Yacan Man ◽

Hua Zhang ◽

Jian Huang ◽

Shanshan Xi ◽

Jinhua Wang ◽

...

Keyword(s):

Catalase Activity ◽

Phosphorus Removal ◽

Copper Ion ◽

Combined Effect ◽

Biological Phosphorus Removal ◽

Biological Phosphorus

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Development of Miniaturized Water Quality Monitoring System Using Wireless Communication

Sensors ◽

10.3390/s19173758 ◽

2019 ◽

Vol 19 (17) ◽

pp. 3758

Author(s):

Hsing-Cheng Yu ◽

Ming-Yang Tsai ◽

Yuan-Chih Tsai ◽

Jhih-Jyun You ◽

Chun-Lin Cheng ◽

...

Keyword(s):

Water Quality ◽

Electrical Conductivity ◽

Wireless Communication ◽

Monitoring System ◽

Industrial Waste ◽

Continuous Monitoring ◽

Copper Ion ◽

Water Quality Monitoring ◽

Ion Concentration ◽

Quality Monitoring

Recently, environmental pollution resulting from industrial waste has been emerging in an endless stream. The industrial waste contains chemical materials, heavy metal ions, and other toxic materials. Once the industrial waste is discharged without standards, it might lead to water or environmental pollution. Hence, it has become more important to provide evidence-based water quality monitoring. The use of a multifunctional miniaturized water quality monitoring system (WQMS), that contains continuous monitoring, water quality monitoring, and wireless communication applications, simultaneously, is infrequent. Thus, electrodes integrated with polydimethylsiloxane flow channels were presented in this study to be a compound sensor, and the sensor can be adopted concurrently to measure temperature, pH, electrical conductivity, and copper ion concentration, whose sensitivities are determined as 0.0193 °C/mV, −0.0642 pH/mV, 1.1008 mS/V·cm (from 0 mS/cm to 2 mS/cm) and 1.1975 mS/V·cm (from 2 mS/cm to 5.07 mS/cm), and 0.0111 ppm/mV, respectively. A LoRa shield connected into the system could provide support as a node of long range wide area network (LoRaWAN) for wireless communication application. As mentioned above, the sensors, LoRa, and circuit have been integrated in this study to a continuous monitoring system, WQMS. The advantages of the multifunctional miniaturized WQMS are low cost, small size, easy maintenance, continuous sampling and long-term monitoring for many days. Every tested period is 180 min, and the measured rate is 5 times per 20 min. The feedback signals of the miniaturized WQMS and measured values of the instrument were obtained to compare the difference. In the measured results at three different place-to-place locations the errors of electrical conductivity are 0.051 mS/cm, 0.106 mS/cm, and 0.092 mS/cm, respectively. The errors of pH are 0.68, 0.87, and 0.56, respectively. The errors of temperature are 0.311 °C, 0.252 °C, and 0.304 °C, respectively. The errors of copper ion concentration are 0.051 ppm, 0.058 ppm, 0.050 ppm, respectively.

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Hydroxyapatite modified with silica used for sorption of copper(II)

Chemical Papers ◽

10.2478/s11696-009-0059-x ◽

2009 ◽

Vol 63 (5) ◽

Cited By ~ 21

Author(s):

Erzsébet-Sára Bogya ◽

Réka Barabás ◽

Alexandra Csavdári ◽

Valentina Dejeu ◽

Ioan Bâldea

Keyword(s):

Copper Ions ◽

Copper Ion ◽

Reaction Medium ◽

Kinetic Studies ◽

Sorption Process ◽

Silica Content ◽

Ion Concentration ◽

X Ray Diffraction ◽

Structural Modifications ◽

Preparation Phase

AbstractThis paper aims to increase the sorption capacity of hydroxyapatite and to find the best apatite-based material for metal ions sorption. The sorption process of copper ions from water solutions by HAP and structurally modified HAP was carried out in this work. Structural modifications of HAP were realized in the preparation phase by an addition of sodium silica into the reaction medium. The prepared materials were characterized by physical-chemical methods: IR, electron-microscopy and X-ray diffraction. The composites characterized were tested in kinetic studies regarding ion exchange and adsorption of Cu2+. It was revealed that the silica content, particle size and initial copper ion concentration influence the process rate.

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