Cyclic voltammetric studies of carbon steel corrosion in chloride-formation water solution and effect of some inorganic salts

AbstractThe influence of sulfide, sulfate and bicarbonate anions on the pitting corrosion behavior of carbon steel in formation water containing chloride ions were analyzed by means of cyclic voltammetry technique and complemented by X-ray diffraction (XRD) investigation. The anodic response exhibits a well-defined anodic peak A, followed by a passive region. A pronounced increase in the anodic current density is observed in the passive region at pitting potential (Epit). On the other hand, the cathodic sweep shows two cathodic peaks CI and CII. The data show that the presence of chloride ions causes pitting corrosion of carbon steel in formation water. It was found that both the pitting potential Epit and the repassivation potential (Epro) decreased with increase in Cl− ions concentration. Data clearly show that the presence of Na2S with 0.3M of chloride ions has a strong accelerating effect on the active dissolution and pitting corrosion of carbon steel in formation water, while the presence of Na2SO4 and NaHCO3 with chloride ions has an inhibiting effect on the active dissolution and pitting corrosion

Coronavirus, Cohorts, and International Demography

This essay considers how the pandemic will shape current and upcoming cohorts of demographers

Developing Resiliency Knowledge in New Graduate Nurses Through Self-Care Education

During the transition to practice, new graduate nurses (NGNs) face conflict and uncertainty influenced by lack of resiliency and self-care knowledge. In a rural hospital, NGNs had minimal standardized guidance during the transition to practice. Without a proper understanding of resiliency and self-care knowledge, NGNs could not adapt to change and risked leaving the profession or harming patients. A self-care staff education project was developed to improve knowledge of resiliency in a group of NGNs. Self-care deficit theory provided the framework for the project. Sources of evidence published between 2017 and 2022 were used as well as previously analyzed data from the hospital. The education project was implemented as a series of modules to enhance NGNs’ knowledge of self-care and resiliency. A preeducation and posteducation survey were completed by seven NGNs in the hospital. Descriptive and inferential statistics were used to analyze the survey data. Although only one question elicited statistically significant improvement, other survey results had clinical significance. Findings indicated an overall positive relationship between the staff education project and NGNs’ understanding of self-care strategies and resiliency. Recommendations include altering instructional delivery to improve accessibility, engaging stakeholders, and incorporating the project into the NGN boot camp and residency program. Addressing NGNs’ resiliency knowledge and self-care practices may support the state and national focus on increasing retention of nurses in practice

SkinSafe: Comparing Staphylococcus aureus Growth Across Liner Types in Kenya

The interface between an amputee’s residual limb and prosthetic liner is at risk for high levels of bacterial growth which can lead to infection. Silicone liners have the advantage of patient comfort, but they may have a sealing effect that could exacerbate bacterial growth, which is particularly a concern in places lacking clean water such as Kijabe, Kenya. To investigate this concern, the SkinSafe team has conducted a prosthetic liner study using a bacterial skin model which suspends a liner and a layer of agar above a self-regulating heat and water source to capture the dynamic behavior of the skin–liner interface. Staphylococcus aureus was grown on this model using three different liners: the Ossur Iceross silicone liner, the Namaste silicone liner, and the sock–EVA liner. Final growth concentrations will be compared between the three liner types to determine whether silicone liners require additional hygiene protocols for use in Kenya. Funding for this work provided by The Collaboratory for Strategic Partnerships and Applied Research.https://mosaic.messiah.edu/engr2022/1015/thumbnail.jp

Early Women, Late Men: Timing Attitudes and Gender Differences in Marriage

Peer Reviewedhttps://deepblue.lib.umich.edu/bitstream/2027.42/138327/1/jomf12426_am.pdfhttps://deepblue.lib.umich.edu/bitstream/2027.42/138327/2/jomf12426.pd

University Band Symphonic Band Symphonic Winds

Center for the Performing Arts Sunday Afternoon November 11, 2007 2:00p.m

Eficiencia de los métodos de compostaje tradicional, bocashi y takakura en la degradación de residuos orgánicos en Chachapoyas, Amazonas, 2022

El objetivo de la investigación es determinar la eficiencia del compostaje tradicional, Bocashi y Takakura en la degradación de residuos orgánicos en el distrito de Chachapoyas, Amazonas. El tipo de la investigación es aplicada, con enfoque cuantitativo y diseño experimental, para eso se realizan cinco tratamientos; T (Tradicional) con una repetición, TK1, TK2, B1 Y B2, estos con 3 repeticiones cada uno, por cada método se hizo dos dosis con diferentes componentes para la preparación. Los resultados obtenidos, se basan en parámetros fisicoquímicos (N, P, K, C.E., %H, T° y pH) donde el Takakura obtuvo el 63.3% de criterios fisicoquímicos de calidad de compost; el tradicional cumplió el 58,67% y el método Bocashi cumplió en su dosis 1 el 55% de los criterios y en su dosis 2, el 53%. En los parámetros microbiológicos (Recuento de aerobios mesófilos, hongos y levaduras) todos estuvieron dentro del rango establecido y por último, se calificó la efectividad técnico económica de cada uno de los métodos, las dosis del Takakura obtuvieron un 100% de eficiencia, el método Bocashi en sus dos dosis completaron el 90.42% de eficiencia. Finalmente, el tradicional completo el 60% de eficiencia en la degradación de residuos orgánicos

Descomposición térmica de aceite de germen de arroz para su uso como gasóleo

Ricebran oil; a non edible oil, was thermally decomposed using different loads of calcium oxide as catalyst. The fuel properties of the cracked product were evaluated as compared to those of diesel fuel. The considered properties included the calorific value, flash point, viscosity, pour point, distillation characteristics, cetane number in addition to some other fuel properties. The results had shown that the fuel properties of the decomposed oil were quite similar to those of standard diesel fuel. The calorific value was 80-90% that of diesel fuel and the viscosity was sligthy higher. The prepared fuel was advantageous over diesel fuel as the former was completely free from sulfur, which on fuel combustion produces corrosive gases of sulfur oxides.Aceite de germen de arroz, un aceite no comestible, fue descompuesto térmicamente usando diferentes cantidades de óxido cálcico como catalizador. Las propiedades combustibles del producto craqueado fueron evaluadas comparándolas con las del gasóleo. Las propiedades consideradas incluyeron el poder calorífico, punto de inflamación, viscosidad, temperatura de fluidez crítica, características de destilación, número de cetano y otras propiedades de los combustibles. Los resultados han mostrado que las propiedades combustibles del aceite descompuesto fueron bastantes similares a la de los gasóleos estándar. El poder calorífico fue del 80-90% de la del gasóleo y la viscosidad ligeramente mayor. El combustible preparado fue ventajoso sobre el gasóleo ya que el primero estaba completamente libre de sulfuro, el cual produce en la combustión del carburante gases corrosivos de óxido de azufre