Mineral Supplements, Copper, Nickel, and Cobalt Content of Oyster Shells

Young, R. S.

doi:10.1021/jf60112a018

Cited by 3 publications

(3 citation statements)

References 2 publications

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“…Redox properties of Cu can contribute to its toxicity, as free ions trigger production of damaging radicals 41 . In the literature, Cu addition to crops led to several bene ts in agriculture [42][43][44] , however it was harmful in other reports 45 .…”

Section: Resultsmentioning

confidence: 99%

Variation in polyphenolics, bioactive compounds and nutrients of barley (Hordeum vulgare L.) after exposure to copper and copper oxide nanoparticles: Health risk implications of nanofertilizers in agriculture

Karmous

Kadri²,

Rahmani

et al. 2022

Preprint

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Possible impacts of nanofertilizer-mediated agriculture were assessed by studying the effects of copper and copper oxide nanoparticles (CuNP and CuO NP) on barley (Hordeum vulgare L.) seedlings. Liquid chromatography coupled to mass spectrometry and gas chromatography coupled to mass spectrometry revealed qualitative and quantitative changes in many phytochemicals. CuNP and CuO NP caused depletion of several phenolic acids and flavonoids, which may reduce the antioxidant potential of foods derived from barley. An additional effect was noted as a deficiency in some bioactive compounds such as the volatile organic compounds. In addition, an imbalance in essential minerals may have impacts on biochemical and physiological functions in the human body. Alteration of nutritional quality, added to the accumulation of toxic cupric ions and hazards associated with possible induction of oxidative stress raise concerns about use of Cu and CuO based nanofertilizers in agriculture without more rigorous risk-assessment.

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Section: Resultsmentioning

confidence: 99%

Variation in polyphenolics, bioactive compounds and nutrients of barley (Hordeum vulgare L.) after exposure to copper and copper oxide nanoparticles: Health risk implications of nanofertilizers in agriculture

Karmous

Kadri²,

Rahmani

et al. 2022

Preprint

View full text Add to dashboard Cite

show abstract

“…Redox properties of Cu can contribute to its toxicity, as free ions catalyse production of damaging radicals (Manceau et al 2008). In the literature, Cu addition to crops led to several benefits in agriculture (Vinceković et al 2016;Tan et al 2018;Lamichhane et al 2018), however it was harmful in other reports (Young 1960). In fact, excessive Cu intake can lead to toxicity and a drop in Zn and vitamin C levels.…”

Section: Production Of H2o2 Phenolic Acids and Flavonoidsmentioning

confidence: 99%

Variation in polyphenolics, bioactive compounds and nutrients in barley (Hordeum vulgare L.) after exposure to copper and copper oxide nanoparticles: Implications for use of nanofertilizers in agriculture.

Karmous,

Kadri,

Rahmani

et al. 2024

Preprint

View full text Add to dashboard Cite

Possible risks of nanofertilizer-mediated agriculture were assessed by studying the effects of copper and copper oxide nanoparticles (Cu NP and CuO NP) on barley (Hordeum vulgare L.) seedlings. Liquid chromatography coupled to mass spectrometry and gas chromatography coupled to mass spectrometry revealed qualitative and quantitative changes in the main phytochemicals. Cu NP and CuO NP caused depletion of several phenolic acids and flavonoids, which may reduce the antioxidant potential of foods derived from barley. An additional effect noted was a deficiency in some bioactive materials such as volatile organic compounds. In addition, an imbalance of essential mineral levels may alter biochemical and physiological functions in diets featuring barley. Effects on nutrients were complex. Some were nanoparticle-specific, some were common to both nanoparticles and some were associated with metallic copper becoming bioavailable. Alteration of nutritional quality, added to the accumulation of toxic cupric ions and hazards associated with the induction of oxidative stress raise some concerns about use of Cu and CuO based nanofertilizers.

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“…On the other hand, using natural waste as a reinforcement material is a good method to get rid of large quantities of waste that have no feasible economic benefit. Oyster shells (OS) are one of the most calcium-rich natural wastes, with around 95% CaCO3, followed by Cu, Ni, Co, and Fe oxide [7], and the least expensive [8]. MMCs have been made using different methods, including liquid metallurgy [9], powder metallurgy [10], in situ synthesis [11], and spray forming [12].…”

Section: Introductionmentioning

confidence: 99%

Recycling of Waste Oyster Shells as a Reinforcement Materials for Aa7075 Alloy

Metwally

2022

Journal of Al-Azhar University Engineering Sector

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In the current research, oyster shells have been recycled by reinforcing with aluminum alloy AA7075 using the stir casting method. The oyster shells (OS) were washed and milled via high energy ball mill. The produced castings were fabricated with various content of the OS particles as (0-15 Wt.%). The effect of oyster shell particles (OS) on the microstructures, mechanical properties and corrosion behavior of AA7075/OS composites has been studied. The microstructure results revealed a uniform distribution of oyster shell particles within AA7075 matrix. Compression, brinell hardness, and impact tests of the sample were carried out to identify the mechanical properties of the composite. The hardness was increased from 37%, 61% and 88.7% for AA7075 reinforced with 5, 10 and 15% OS composite compared with unrienforced AA7075. On the other hand, the ultimate compressive strength was improved from 10.7%, 19.8% and 25.9% for AA7075 reinforced with 5, 10 and 15% OS composite compared with unreinforced AA7075. The corrosion rate and weight loss method were carried out by immersing the specimens in 0.1M NaOH and 0.1M H2SO4 solutions. Results revealed that the rate of corrosion and mass loss were decreased with an increase of mass fraction up to 15%.

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Mineral Supplements, Copper, Nickel, and Cobalt Content of Oyster Shells

Cited by 3 publications

References 2 publications

Variation in polyphenolics, bioactive compounds and nutrients of barley (Hordeum vulgare L.) after exposure to copper and copper oxide nanoparticles: Health risk implications of nanofertilizers in agriculture

Variation in polyphenolics, bioactive compounds and nutrients of barley (Hordeum vulgare L.) after exposure to copper and copper oxide nanoparticles: Health risk implications of nanofertilizers in agriculture

Variation in polyphenolics, bioactive compounds and nutrients in barley (Hordeum vulgare L.) after exposure to copper and copper oxide nanoparticles: Implications for use of nanofertilizers in agriculture.

Recycling of Waste Oyster Shells as a Reinforcement Materials for Aa7075 Alloy

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