Archives-October 2022

Five (5) heavy metals: Cd, Co, Fe, Pb and Zn were monitored in groundwater at three (3) borehole and three (3) hand dug wells and used to evaluate the heavy metal pollution index (HPI) adopting two joined approaches. In the first instance heavy metals that were not detected by the instrument were assigned zero concentration. With the second instance, these heavy metals were assigned the limit of detection of the instrument as if they were present to that extent. These two joined approaches were used in the calculation of HPI for the groundwater based on the mean concentrations of the selected heavy metals and the limit of detection from the instrument. The two (2) approaches gave similar results. The two HPI joined approaches for zero concentration for metals not detected and for the limit of detection of the instrument for metals not detected for the dry season were 0.887 and 0.880 respectively. The near sameness of these values indicates that both approaches could be used to calculate the HPI. There was a significant correlation (P<0.01) between the two HPIs. The results indicates that the groundwater monitored is free from the selected heavy metal pollution.

The present article is an attempt to study Annie Proulx’s short story collection: Fine Just the Way It Is in the light of Judith Butler’s concepts of vulnerability and gender performativity. According to Butler, all bodies are manipulated by regulatory norms and existing cultural power to perform a predefined gender role as well as vulnerable from the start to the world of others. By exploring the stories through Butlerian concepts of gender performativity and vulnerability, this article presents that Proulx’s characters not only gain their recognition in a political project through following their gender performativity, but also experience the collective condition of vulnerability to the socioeconomic structures as well as conditioned by power. Therefore, this analysis inevitably seeks to particularize the way Proulx’s characters portray the norms of performativity which have to be performed in order to be recognized in social realm through ‘desire’ and ‘enactment’. Furthermore, by paralyzing Butler’s concept of vulnerability to the literary pieces, the present study delineates the situations in which characters experience ‘violence’, ‘insecurity’, and ‘lack of autonomy’ instigated by interdependency and imposed conventions of social structures.

The effects of some organic additives to the galvanizing in amonium chloride electrolyte zinc plating baths were studied. The results show that all additives added to the plating solution shifted the potential of the zinc precipitate towards a more negative side. Additive NAP 14-90 added to the plating solution increased cathode polarization and created a coating with a wide gloss and semi-gloss range. Additives Berol 840 and o-Chlorobenzaldehyde added with NAP 14-90 improved gloss and widen the semi-gloss range. When Berol 840 and o-Chlorobenzaldehyde were added to the plating solution without NAP 14-90, the deposit distribution decreased deeply and the coating could not form at low current densities. The additives added to the plating solution changed the coating morphology. The plating samples in the solution containing the additive NAP 14-90 gived a smooth and uniform coating morphology. The sample had all three additives providing the smoothest coating morphology. The additives added to the plating solution had little effect on the plating efficiency. Additives 2 ml/L NAP 14-90 + 1 ml/L Berol 840 + 0.2 ml/L o-Chlorobenzaldehyde were selected to improve the properties of the coating and the plating process in the ammonium chloride system.

This work aims to evaluate the effects of current density and plating time on the corrosion resistance of ZnNiSiO2 electroplated coating. For the plating time, the results showed that coating thickness increased with increasing the plating time. The average thickness was 6, 15 and 25 µm, when used plating time of 10, 30 and 50 minutes, respectively.Whereas, when the current density values varied from 1 A/dm2 to 5 A/dm2, the coating thickness was in range of 14.7 - 15.3 µm, with the same plating times. After 900 hours of exposure to salt spray, the surface appearance of coatings indicated that the plating time of 30 minutes provided the highest corrosion resistance. These data were coherent with the findings from polarization curve measurement.

New vanillin Schiff bases (A1-A6) have been prepared. The Schiff bases were synthesized via condensation of vanillin with various substituted anilines. Compounds A1-A4 came out as crystals of different colours while A5-A6 were obtained as thick viscous liquid. The organic compounds were characterized by IR spectra, UV/Visible spectra and melting points measurements. Purity of the new compounds was revealed by their sharp melting points. The coordination feasibility of the compounds was tested using compound A1 with Zn2+, Cu2+, Co2+ and Ni2+ salts.

In this work, we simulate the global solar radiation received by a horizontal surface and vertical surfaces of different orientations on the ground from theoretical models considering the diffusion and absorption of solar radiation through the atmospheric layer. We have to generate results of the global radiation by the model of Liu and Jordan for thermal systems optimization, particularly in the field of the building in the city of Ouagadougou. This work shows that the solar radiation on a surface, in addition to the seasonal variability, also varies according to the orientation and the inclination of the sun. Thus, in the case of buildings, for example, exposing the large surfaces of the building according to the southern orientation will be avoided in favor of the northern orientation. It is also necessary to consider the scenario of use of the building to situate it in space and time in order to minimize the thermal contributions.

The COVID-19 pandemic has shown an impact on sexually transmitted infections. The research aims to understand an overview of CDC's STI surveillance data for 2020 that can provide a general understanding and a comprehensive review of patternsofChlamydia and Gonorrhea infections among men and women.The study conducted an in-depth qualitative research analysis of the CDC's STI surveillance data for 2020. The studyanalyzes particular research questions.What is the difference between reported cases of Chlamydia and Gonorrhea among men and women? How does sexual orientation affect reported cases of Chlamydia and Gonorrhea? What demographics are associated with Chlamydia and Gonorrhea cases? The research analyzes the number of cases of Chlamydi and Gonorrheain fections among men and women, includingsexualorientation, age, ethnicity, and reported cases in healthcare centers.The results of the CDC's STI surveillance data of 2020 have determined that men have a higher number of cases in both infections, and MSM have a higher number of cases in the sexual orientation category. The result differed based on ethnicity, in which females had a significant increase in chlamydia cases compared to men while men had an increased number of gonorrhea cases. African American men and women have shown the greatest number of cases. Non-Hispanic/Pacific Islanders men have a higher number of chlamydia cases compared to women. Overall, the transmission of gonorrhea is higher in men, while chlamydia is seen most in women.Sexually transmitted infections such as gonorrhea and chlamydia may present with unseen consequences. Gender, age, and ethnicity play a vital role in our society in improving health conditions. Limitations may occur within the study. The results may show biases based on the lack of data submission due to restrictions. The inconsistency of recording data could occur based on social distancing guidelines, quarantining, and lack of resources available during the pandemic and guidelines that significantly affect the public. Public health officials utilize the data to determine high prevalence areas to improve policies and guidelines that significantly affect the public.

In this manuscript, we will discuss a definition of Laplace transforms with some of their properties. with common applications. This will be according to some types and ranks of differential equations. We will also show how to find the inverse Laplace transform. We also showed what are differential equations of the third order and how the Laplace transform is applied to them. In addition to (Heterogeneous Linear Equations), which is a type of differential equation. The articles of this manuscript were interspersed with a mention of some types of solutions.

In this manuscript we will show what are the Laplace transforms. What is their relationship to differential equations? Where we will explain some general examples of this relationship through a brief explanation of some applications. This will be clarified through the articles of the manuscript as below.

Table of contents for the month of October 2022