Kinetics and mechanistics steps to the electron transfer reaction of peroxo-bridged binuclear cobalt(III) complex of succinimide by glycine in aqueous acidic medium

ABSTRACT. The kinetics and mechanistic steps to the electron transfer reaction of the peroxo-bridged binuclear cobalt(III) complex of succinimide [(suc)(en)2Co(O2)Co(en)2(suc)2+] hereafter called peroxo-bridged dicobalt(III) complex ‘[Co(O2)Co2+]’ by glycine have been carried out spectrophotometrically at λ = 420 nm and T = 26 ± 1 oC, [H+] = 1 x 10-3 M and ᶙ = 0.5 M (NaCl) in aqueous acidic medium. The reaction was found to be first order with respect to [Co(O2)Co2+] and [(Gly] and experimental data indicates a second-order overall. The reactions obeyed the general rate law: (d[Co(O2)Co2+]/dt) = (a +b)[H+])[Co(O2)Co2+][Gly]. Varying hydrogen ion concentration accelerated the reaction rate and shows first-order dependence while the reactions also affected by changes in the ionic strength of the reaction medium by giving a non-negative salt effect in the course of the reaction. Free radicals were not detected in the reactions. Spectroscopic investigation and Michaelis-Menten plots suggest the absence of intermediate complex formation. The experimental result obtained in this system is concluded in favor of the outer-sphere mechanism.                     KEY WORDS: Cobalt(III) complex, Kinetic, Electron transfer, Spectroscopic, Mechanistic steps, Michaelis-Menten, Glycine   Bull. Chem. Soc. Ethiop. 2021, 35(2), 425-434. DOI:  https://dx.doi.org/10.4314/bcse.v35i2.1

Impact of Agricultural Waste on Sustainable Environment and Health of Rural Women

The study worked on the impact of agricultural waste on sustainable environment and health of rural women.  Three specific objectives were formulated for the study and included to identify the constituents of agricultural waste, to determine the environmental and health impact of agricultural waste and to determine the effective management techniques of agricultural wastes. Three research questions and three null hypotheses were also formulated in line with the specific objectives. Survey research design was adopted for the study. Population for the study was 3970 representing 450 registered livestock farmers, 3270 rural women and 250 environmental health workers in Anambra State.  Proportionate random sampling technique was used to draw a sample of 350 respondents representing 40 registered livestock farmers, 286 rural women and 24 environmental health workers. Questionnaire developed by the researchers was used to collect data. The instrument was face validated by three experts and reliability was tested using cronbach alpha method which yielded a coefficient of 0.86. Data were collected with the help of fifteen research assistants and 325 instruments were retrieved representing 81% return rate. Mean and Standard Deviation were used to answer the research questions while ANOVA was used to test the null hypotheses at 0.05 level of significance and at the appropriate degrees of freedom. Any null hypothesis whose p-value was greater than 0.05 level of significance at the appropriate degrees of freedom was upheld while a null hypothesis was rejected when the p-value was less than 0.05 level of significance at the appropriate degrees of freedom. The findings of the study indicated that animal faeces, urine, used litter, beddings, animal carcass, dairy parlor washings, waste milk, wasted feed, feedlot run-off, paunch waste, abattoir waste water, animal viscera, horns, feather, bones, blood, fur, placenta, birth tissues, fetal membranes, aborted fetus among others are the materials that constitute agricultural waste. It was also found that that air pollution from burning of agricultural wastes, air pollution from cesspools, dioxins from burning agricultural wastes, dirty environment from heaps of agricultural wastes, stench/odour from decaying agricultural waste, defacing of the environment, eutrophication of water bodies, aquatic life destruction, spontaneous abortion, blue-baby syndrome, prolonged mensuration and early menopause, among others are the environmental and health impact of agricultural waste on rural women. It was recommended among others that Extension workers should properly educate farmers on the dangers of agricultural wastes and sensitize them on proper disposal methods. Keywords: agricultural waste, environment, health, rural women, pollution

Dependent seniors garment design

This paper is part of a PhD research in Textile Engineering at University of Minho and aims to establish an ergonomic pattern design methodology to be used in the construction of garments for elderly women, aged 65 and over, dependent of care. The research was developed with a close contact with four institutions involved in supporting this aged population, located in the cities of Guimaraes (Portugal) and Teresina (Brazil). These clothes should be adequate to their anthropometrics and their special needs, in accordance with important functional factors for the dependency of their caregiver, such as: care for the caregiver and comfort for the user. Questions regarding the functional properties of the materials, the pattern design process, trimmings and the assembling process of the garments are specially considered in the desired comfort levels, in order to provide an adequate handling by facilitating the dressing and undressing tasks, but also to assure the user the needed comfort in all its variables.This work is supported by FEDER funds through the Competitive Factors Operational Program (COMPETE) POCI-01-0145-FEDER-007136 and by national funds through Portuguese Foundation for Science and Technology (FCT), under the project UID/CTM/000264 financed by Science Without Borders/CAPEs.info:eu-repo/semantics/publishedVersio

IL-15 Participates in the Respiratory Innate Immune Response to Influenza Virus Infection

Following influenza infection, natural killer (NK) cells function as interim effectors by suppressing viral replication until CD8 T cells are activated, proliferate, and are mobilized within the respiratory tract. Thus, NK cells are an important first line of defense against influenza virus. Here, in a murine model of influenza, we show that virally-induced IL-15 facilitates the trafficking of NK cells into the lung airways. Blocking IL-15 delays NK cell entry to the site of infection and results in a disregulated control of early viral replication. By the same principle, viral control by NK cells can be therapeutically enhanced via intranasal administration of exogenous IL-15 in the early days post influenza infection. In addition to controlling early viral replication, this IL-15-induced mobilization of NK cells to the lung airways has important downstream consequences on adaptive responses. Primarily, depletion of responding NK1.1+ NK cells is associated with reduced immigration of influenza-specific CD8 T cells to the site of infection. Together this work suggests that local deposits of IL-15 in the lung airways regulate the coordinated innate and adaptive immune responses to influenza infection and may represent an important point of immune intervention

Cervical Cancer Screening: Assessment of Perception and Utilization of Services among Health Workers in Low Resource Setting

Background. Cervical cancer is a preventable disease and the most common cancer among women in Nigeria. Objectives. To appraise the perception and utilization of cervical cancer screening services among female nurses in Federal Teaching hospital, Abakaliki. Materials and Methods. A cross-sectional study was done using semi-structured questionnaires on 408 consenting female nurses. Data was represented using simple percentages, charts, and Chi-square. Results. Of the 408 questionnaires shared, 388 were correctly and completely filled and analyzed. The respondents in this study showed good knowledge of cervical cancer as all (388) were aware that cervical cancer is a preventable disease of public health concern. Majority of them, 179 (46.1%) were between 21 and 30 years of age. The most common symptom of cervical cancer identified was postcoital bleeding (57%). Nursing training was the most common (73.5%) source of cervical cancer information. Utilization of cervical cancer screening was poor in this study as only 20.6% of the respondents had ever undergone screening. The most common reason for nonscreening was that they have not thought of it (28.4%). Conclusion. Despite the high level of awareness of cervical cancer screening, utilization remains low. There is, therefore, the need for cervical cancer education for the nurses to help improve utilization

The development of emotional intelligence, selfefficacy, and locus of control in Master of Business Administration students

Successful managers must develop strong interpersonal skills alongside their ability to achieve personal and organizational goals. For educational institutions to stay relevant, courses must equip students with necessary psychological competencies in addition to technical knowledge, skills and abilities for the constantly evolving business climate. We explored whether Master of Business Administration (MBA) programs aid in the development of psychological competencies, given that MBAs are a popular management development tool. Specifically, we investigated changes in MBA candidates\u27 emotional intelligence (EI) ability, self‐efficacy (SE), and locus of control (LoC) in a pre‐post survey design over the course of a 1‐year MBA educational program and explored the relationship of candidate\u27s baseline psychological status to their academic success in the MBA educational program. Participants were recruited from newly enrolled students at an international university in Asia. The study participants (53 MBA students, plus 26 psychology students, and 34 nonstudents as comparison groups) completed self‐report measures of EI, SE, and LoC at the beginning and end of a 1‐year MBA period. The MBA candidates showed significant improvement in EI, SE, and LoC‐internality, as well as an increase in LoC‐powerful others during the program. LoC‐powerful others at the beginning of the program also predicted MBA students\u27 academic performance. The findings provide evidence that psychological competencies that may positively affect work performance are key benefits of MBA education