Solubilities and Physical Properties of Saturated Solutions in the Copper Sulfate + Sulfuric Acid + Seawater System at Different Temperatures

Justel, Francisca J.; Claros, Martha; Taboada, María E.

doi:10.1590/0104-6632.20150323s00003393

Cited by 10 publications

(16 citation statements)

References 7 publications

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“…The same authors' speeches are based on the acidity which tends to dissolve copper and decrease the strength of ion binding to colloids. Furthermore, according to Boone et al (2012), the copper source used (Cu2SO4•5H2O) in this present study is highly soluble, especially in an acidic medium (Justel et al, 2015).…”

Section: Discussionmentioning

confidence: 87%

Grain yield and physiological parameters of gas exchange in common bean as a function of copper fertilization

Bueno

Flores

Andrade

et al. 2021

RSD

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Conducting a field study to investigate the effects of foliar and soil fertilization with copper on the nutritional and physiological parameters and grain yield of common bean. The experimental design was a randomized block, in a 2 x 5 factorial scheme. The first factor was the site of application of copper fertilization. The second factor was copper doses: 0, 1, 2, 3, and 4 kg ha-1 (6 replicates). The following were evaluated: leaf nitrogen and copper contents, relative chlorophyll index (RCI), gas exchange, photochemical efficiency of photosystem II, and grain yield. The data were subjected to analysis of variance and F test (p-value < 0.05), using the Scott & Knott for qualitative data and polynomial regression for quantitative data. Leaf Cu content was higher with soil application (4% and 28%), both at 24 and 45 DAE, respectively. Net photosynthesis reached a maximum index of 18.77 µmol m-2 s-1 with foliar Cu fertilization at the dose of 4 kg ha-1. The application of 2.0 kg ha-1 Cu was the one that led to the highest grain yields; however, soil application stood out with a yield about 12% higher of the foliar. Soil fertilization proved to be more efficient in terms of Cu absorption and RCI rates, improving grain yield (12%) in relation to foliar, especially at the dose of 2 kg ha-1. The dose of 2 kg Cu ha-1 provided the best differential profit, reaching US$ 581.96 ha-1 and US$ 503.01 ha-1 for soil and foliar application, respectively.

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Section: Discussionmentioning

confidence: 87%

Grain yield and physiological parameters of gas exchange in common bean as a function of copper fertilization

Bueno

Flores

Andrade

et al. 2021

RSD

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“…It has been shown that pH is a factor that can influence the properties of copper sulfate. 31 In very acidic media containing sulfuric acid, the concentration of sulfate ion decreases, reducing its effectiveness. In this study, copper sulfate solutions at pH of 7.5 and 7.9 were used, so the effect would not be altered.…”

Section: Discussionmentioning

confidence: 99%

Efficacy of copper sulphate on Candida albicans on heat-polymerized acrylic resin

et al. 2020

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The ageing of population is increasing, and a great percentage of these patients wear removable prostheses, and can suffer denture stomatitis, a condition that has been associated with candidiasis. Aims: To evaluate in vitro the effectiveness of Copper Sulfate against Candida albicans in samples of heat-polymerized acrylic resin, compared to nystatin, sodium hypochlorite and chlorhexidine. Materials and Methods: Initially, the minimum inhibitory concentration (MIC) of copper sulfate for Candida albicans was determined by microdilution. Then, 54 resin samples were divided into 6 treatment groups corresponding to Nystatin 100.000 UI, Sodium Hypochlorite 0.5%, chlorhexidine 0.12%, Copper Sulfate 4.7µg/ml, Copper Sulfate 9.4µg/ml and physiological saline solution, in which samples were submerged for 6 hours. Resin samples were then washed and cultured on solid media at 37°C for 72 hours. The number of colony-forming units was determined using a Quebec colony counter. The statistical analysis was performed using the Kruskal-Wallis test and the Mann-Whitney U test. Results: Copper sulfate at a concentration of 9.4μg/ml presented a similar effectiveness as the other control products regarding the reduction in the number of colonies of Candida albicans post-treatment. Conclusion: The effectiveness of copper sulfate against Candida albicans on acrylic resin was similar to that of nystatin, sodium hypochlorite and chlorhexidine.Abstract: En las últimas décadas se ha observado un aumento de la población de adultos mayores, de los cuales un gran porcentaje es portador de prótesis removible, y dos tercios pueden sufrir estomatitis subprotésica, enfermedad que es asociada a infecciones como candidiasis. Objetivo: Evaluar la efectividad antimicótica in vitro del sulfato de cobre en placas de resinas acrílicas de termocurado inoculadas con Candida albicans, frente a Nistatina, Hipoclorito de Sodio y Clorhexidina. Material y Métodos: Inicialmente, y mediante microdilución del sulfato de cobre, se determinó la concentración mínima inhibitoria (CMI) para Candida albicans. En la fase experimental, 54 muestras de resina se dividieron en 6 grupos correspondientes a Nistatina 100.000 UI, Hipoclorito 0.5%, Clorhexidina 0.12%, Sulfato de Cu 4.7µg/ml, Sufato de Cu 9.4 µg/ml y suero fisiológico. Las muestras fueron sumergidas en estos agentes por 6 horas, para posteriormente ser lavadas y cultivada en medios solidos a 37°C por 72 horas. Luego se realizó el conteo de unidades formadoras de colonias mediante contador tipo Quebec. El análisis estadístico se realizó mediante la prueba de Kruskal-Wallis y la prueba U de Mann-Whitney. Resultado: El sulfato de cobre a una concentración de 9.4μg/

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“…Copper sulfate pentahydrate (CuSO 4 •5H 2 O) is a blue crystalline Cu salt commonly used as a pesticide, fungicide, soil additive, and feed supplement [103]. Copper sulfate is soluble in water with decreased solubility upon subjection to increased acid conditions [104]. Copper sulfate is the most common form of supplemental Cu in animal feeding due to its availability, and its relatively low cost compared with other sources of Cu [105].…”

Section: Copper Sources and Requirements For Pigsmentioning

confidence: 99%

Digestibility and metabolism of copper in diets for pigs and influence of dietary copper on growth performance, intestinal health, and overall immune status: a review

Espinosa

Stein

2021

J Animal Sci Biotechnol

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The current contribution reviews absorption and metabolism of copper (Cu), Cu deficiency, Cu toxicity, Cu bioavailability, and effects of pharmacological levels of Cu on growth performance and intestinal health of pigs. Copper is a micro mineral involved in metabolic reactions including cellular respiration, tissue pigmentation, hemoglobin formation, and connective tissue development. Copper is mostly absorbed in the upper gastrointestinal tract, particularly in the duodenum, but some Cu is absorbed in the stomach. One way to evaluate the efficacy of sources of Cu is to measure relative bioavailability where responses include tissue concentrations of Cu, concentrations of metalloproteins, and enzymatic activity of animals fed test diets containing graded levels of Cu. The requirement for Cu by pigs is 5 to 10 mg/kg diet, however, Cu can be included at growth-promoting levels (i.e., 75 to 250 mg/kg diet) in diets for weanling and growing pigs to reduce post-weaning diarrhea and improve growth performance. The consistently observed improvement in growth performance upon Cu supplementation is likely a result of increases in lipase activity, growth hormone secretion, and expression of genes involved in post-absorptive metabolism of lipids. The growth-promoting effects of dietary Cu have also been attributed to its bacteriostatic and bactericidal properties because Cu may change bacterial populations in the intestine, and thereby reduce inflammation caused by pathogens. However, further research is needed to determine potential interactions between Cu and non-nutritive feed additives (e.g., enzymes, probiotics, phytobiotics), and the optimum quantity of Cu as well as the optimum duration of feeding supplemental Cu in diets for pigs should be further investigated. These gaps needs to be addressed to maximize inclusion of Cu in diets to improve growth performance while minimizing diseases and mortality.

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Solubilities and Physical Properties of Saturated Solutions in the Copper Sulfate + Sulfuric Acid + Seawater System at Different Temperatures

Cited by 10 publications

References 7 publications

Grain yield and physiological parameters of gas exchange in common bean as a function of copper fertilization

Grain yield and physiological parameters of gas exchange in common bean as a function of copper fertilization

Efficacy of copper sulphate on Candida albicans on heat-polymerized acrylic resin

Digestibility and metabolism of copper in diets for pigs and influence of dietary copper on growth performance, intestinal health, and overall immune status: a review

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