Impact of Climate Variability on Irrigation Water Needs and Irrigation Schedules of Maize and Cucumber in Aba, Abia State

In an attempt to address the discrepancies in the food production and population growth rates in Nigeria, this study estimated the irrigation water requirements of maize and cucumber in Aba, Abia State. Meteorological parameters (rainfall, minimum and maximum temperature, relative humidity, wind speed, sunshine hours) were collected from NiMet Abuja for 20 years (2000 to 2020). CROPWAT version 8.0 was applied to determine the Crop ETo and irrigation schedule of maize and cucumber. The hypothesis: Impact of climate variability does not influence irrigation of maize and cucumber was tested using Pearson correlation coefficient. The result shows that during the early and late planting season of maize, the crop water used are 338.6mm and 276.6mm, effective rainfall 478.8mm and 782.8mm and the total rainfall 740.0mm and 1028.6mm. For cucumber, the water used by the crop is 334.9mm and 285.8mm, and effective rainfall 332.6mm and 663.9mm. There was no irrigation schedule for maize and cucumber during the early and late plating seasons. It shows that water requirement for maize and cucumber was enough during the seasons. The highest crop ETo and temperature was in the month of March (4.57mm/day) and January (33.7°C). The study also reveals that the impact of climate change on irrigation water need at 0.05 significant level is IR=192.811-0.089(TR). The result shows a negative slope (-0.089), which means a negative relationship between Irrigation required and total rainfall over the 20 years period. This indicates that as rainfall increases, irrigation required decreases. The study therefore, suggests that maize and cucumber should be planted in Aba all year round; since there is enough rainfall for the crop

Understanding Golf Country Club Members’ Loyalty: Factors Affecting Membership Renewal Decisions

Many private country clubs across the United States have experienced a declining or flat membership and smaller waitlists of members wanting to join. The objective of this study was to investigate whether member involvement, service quality, and perceived value, influence member satisfaction and intention to renew membership for members of private country clubs. An online survey instrument customized for the country club industry was distributed to members of two country clubs in northeast Ohio. Results indicate that involvement level of members and perceived value impact country club members’ satisfaction and intention to renew their membership. Managerial implications are discussed

Determinants of contraceptive methods use after voluntary induced abortion at the Yaounde Central Hospital, Cameroon

Background: Abortion is the termination of pregnancy with expulsion of the product of conception before the age of fetal viability- 28 weeks. In Africa, 96% of abortions are unsafe and there is an estimated 1 death for 150 abortions. Few data are available in Cameroon on the determinants of contraception after a voluntary termination of pregnancy. The objective of this study to investigate the determinants of the use of contraceptive methods after a voluntary termination of pregnancy.Methods: The study was descriptive cross-sectional lasting 09 months in the gynecology and obstetrics unit of the Yaounde Central Hospital. We included women admitted to this unit who have already had at least one abortion. All women who did not give their consent were excluded. The data were entered and analyzed using the Epi-info software version 7.2.2.6. The tools used to express our results were the Student's and Whitney's test, the Wald test and the Odd ratios (OR) with their 95% confidence interval. The significance level was 5%.Results: Out of 139 participants, 86 (61.87%) had already used a modern contraceptive method after voluntary termination of pregnancy. The mean age was 27.13±6.16 years with extremes of 16 and 42 years. Being single and having unwanted pregnancies independently increased contraceptive method use after abortions.Conclusions: An intensification of campaigns for behaviour change and men's involvement would further improve the use of contraceptive methods after abortion

FUNGAL CONTAMINATION OF AIR AND WATER SAMPLES FROM POULTRY FARMS THAT PRACTICE FLOOR AND CAGE HOUSING SYSTEMS IN ANAMBRA STATE, NIGERIA.

The industrialization of the poultry sector poses negative impact on air and water. Investigation on fungal contamination of 100 samples each of air and water were carried out in each of the ten poultry farms that practice floor and cage housing systems in Anambra State. The air mycoflora by plate exposure method and water samples (100ml) collected from tap water and drinkers in sterile sample bottles, were spread inoculated on Sabouraud Dextrose Agar plates supplemented with 0.05mg/ml Chloramphenicol, incubated at 25oC for 3 – 7 days. The isolates were identified based on their macroscopic, microscopic and genetic features. Fungi isolated include the following genera, Aspergillus, Penicillium, Fusarium, Curvularia, Trichoderma, Scopulariopsis, Acremonium, Syncephalis, Lichtheima, Paecilomyces, Cunninghamella, Starchybotrys, Chrysonila and Yeast. The fungal loads of air and water samples during dry and rainy seasons were higher in poultries that practice floor system than cage system. The poultry with floor system had the highest mean fungal loads of 1.29 × 102 cfu/ml for air and 1.22 × 105 cfu/ml for water during dry season which is statistically significant (p=0.024). Most of the identified fungal species are characterized as allergens and an exposure of their spores may provoke adverse health effects

The role of honey in the treatment of type 2 diabetes mellitus: a review of literature

The use of honey in the control of hyperglycemia in patients with type 2 diabetes mellitus is a current option being explored globally. Honey bees which are named in Latin as Apis, use the collected nectar from plants to produce honey after regurgitation and digestion of nectar. Carbohydrate constitutes about 80% of the components of honey. It includes monosaccharides [fructose (37.5%) and glucose (30.6%), disaccharides (sucrose (1.6%) and maltose (2.7%)] and oligosaccharides. Natural honey also contains water (17.2%), proteins, vitamins, minerals, enzymes, acids such as flavonoids, phenolic acids and other components. Honey is rich in antioxidant content and these antioxidant compounds function as endogenous cellular antioxidant defences against free radicals in diabetes mellitus. Antioxidants have also been shown to exert a beneficial effects on blood glucose. Fructose and other bioactive constituents of honey have also been linked with amelioration of hyperglycemia. Besides the beneficial effects of honey on blood glucose, honey is widely used in the management of diabetic foot ulcers, an important complication of diabetes mellitus. The wound-healing benefits of honey are attributed to its antioxidant constituents and broad-spectrum antimicrobial activity. Though additional studies are needed, the use of honey in the management of diabetes mellitus holds much promise

An analysis of civil aviation industry safety needs for the introduction of liquid hydrogen propulsion technology

Over the next few decades air travel is predicted to grow, with international agencies, manufacturers and governments predicting a considerable increase in aviation use. However, based on current fuel type, International Civil Aviation Organization (ICAO) project emissions from aviation are estimated to be seven to ten times higher in 2050 than in 1990. These conflicting needs are problematic and have led to the EU Flightpath 2050 targeting dramatic emissions reductions for the sector (75% CO2, 90% NOX by 2050). One proposed solution, decreasing carbon emissions without stunting the increase in air travel, is hydrogen propulsion; a technology with clear environmental benefits. However, enabling the safe application of this fuel to aviation systems and industrial infrastructure would be a significant challenge. High-profile catastrophic incidents involving hydrogen, and the flammable and cryogenic nature of liquid hydrogen (LH2) have led to its reputation as a more dangerous substance than existing or alternative fuels. But, where they are used (in industry, transport, energy), with sufficient protocols, hydrogen can have a similar level of safety to other fuels. A knowledge of hazards, risks and the management of these becomes key to the integration of any new technology. Using assessments, and a gap analysis approach, this paper examines the civil aviation industry requirements, from a safety perspective, for the introduction of LH2 fuel use. Specific proposed technology assessments are used to analyze incident likelihood, consequence impact, and ease of remediation for hazards in LH2 systems, and a gap analysis approach is utilized to identify if existing data is sufficient for reliable technology safety assessment. Outstanding industry needs are exposed by both examining challenges that have been identified in transport and industrial areas, and by identifying the gaps in current knowledge that are preventing credible assessment, reliable comparison to other fuels and the development of engineering systems. This paper demonstrates that while hydrogen can be a safe and environmentally friendly fuel option, a significant amount of work is required for the implementation of LH2 technology from a mass market perspective

Decadal Assessment and Distribution of Rainfall Anomaly Index (1991 – 2020) for Benin City, Edo State, Nigeria

This study was designed to provide valuable insight into the temporal patterns of rainfall in Benin City, Edo State, Nigeria using rainfall data from 1991 – 2020 (30 years) collected from Nigerian Meteorological Agency (NIMET), airport station, Benin City. The data were assessed based on 10 years interval (decade) identified as decadal A (1991-2000), decadal B (2001-2010) and decadal C (2011-2020). The data was analysed descriptively using charts and graphs. Also, Rainfall Anomaly Index (RAI) was determined for each decadal. Findings from the study reveal that rainfall pattern changes significantly based on statistics for each decadal. In decadal A, rainfall usually began in the month of July to October, June to September in decadal B while May to September in decadal C with rainfall going above the annual precipitation (2679 mm) for the City. The rainfall anomaly over the city revealed that there was a composite nature in which some dry years were mixed with wet years and vice versa and this occurred in all decades. RAI revealed that decadal C recorded the highest number of years (7) of intense rainfall compared to decadal A and B. The trend for the average annual rainfall showed a significant trend based on the decade. The average annual rainfall increased with time (decade) as the trend rose from 1886.9 mm in decade A to 1890.0mm in decade B and 2078.8 mm in decade C. The year of greatest positive value was 2016 (decadal C), with an average RAI of 6.53 classified as extremely humid. Based on these findings, the study concludes that the climate in Benin City has significantly changed

Influence of PLLA/PCL/HA scaffold fiber orientation on mechanical properties and osteoblast behavior

Scaffolds based on aligned and non-aligned poly (L-lactic acid) (PLLA)/polycaprolactone (PCL) fibers obtained by electrospinning, associated to electrosprayed hydroxyapatite (HA) for tissue engineering applications were developed and their performance was compared in terms of their morphology and biological and mechanical behaviors. The morphological results assessed by scanning electron microscopy showed a mesh of PLLA/PCL fibers (random and perfectly aligned) associated with aggregates of nanophased HA. Fourier transform infrared spectrometry confirmed the homogeneity in the blends and the presence of nanoHA in the scaffold. As a result of fiber alignment a 15-fold increase in Young's Modulus and an 8-fold increase in tensile strength were observed when compared to non-aligned fibers. In PLLA/PCL/HA scaffolds, the introduction of nanoHA caused a remarkable improvement of the mechanical strength of this material acting as a reinforcement, enhancing the response of these constructs to tensile stress. In vitro testing was evaluated using osteoblast (MC3T3-E1) cells. The results showed that both fibrous scaffolds were able to support osteoblast cell adhesion and proliferation and that fiber alignment induced increased cellular metabolic activity. In addition, the adhesion and proliferation of Staphylococcus aureus were evaluated and a lower number of colony forming units (CFUs) was obtained in the scaffolds with aligned fibers.Project UID/BIM/04293/2019 by FCT/MCTES through Portuguese Funds

The Role of Gender in Nurse-Resident Interactions: A mixed-methods study

Background: Gender disparities continue to persist within the medical field. Adverse effects of gender bias are well documented, including among trainees in Emergency Medicine (EM). The extent to which gender bias affects interprofessional interactions is not well understood. Objectives: The study aimed to understand perceptions and experiences of gender bias in interactions between emergency medicine (EM) residents and emergency department (ED) nurses. Methods: This mixed-methods study involved eight key informant interviews and two focus groups, and an anonymous electronic survey administered to EM residents and nurses at two teaching hospitals. Quantitative analysis included descriptive statistics and between-group comparisons using Student t-tests and two-sample Wilcoxon rank-sum. Qualitative analysis used a inductive and thematic content analysis. Results: Most participants identified gender as an important factor in ED interprofessional relationships. Key themes emerging from qualitative data include differential treatment and communication styles based on gender. 134 individuals completed the survey: 104 nurses (29% response rate), 30 residents (53% response rate). Females more frequently reported experiencing interprofessional gender bias than males [mean 30.9 (95% CI 25.6-36.2) vs 17.6 (95%CI 10.3-24.9)]. Residents of both genders reported witnessing interprofessional gender bias more frequently than nurses [mean 58.7 (95%CI 48.6-68.7) vs 23.9 (95%CI 19.4-28.4)]. Residents, compared to nurses, more frequently felt gender bias affects job satisfaction (p=0.002) and patient care (p=0.001). These differences were largely driven by female residents’ responses. Conclusion/impact: Gender plays a significant role in shaping interprofessional interactions in the ED. Gender bias in interprofessional interactions contributes to workplace dissatisfaction, particularly for female residents. Initiatives to establish equitable relationships across the gender spectrum in EM are needed to address interprofessional gender bias.https://jdc.jefferson.edu/sexandgenderhealth/1033/thumbnail.jp

A pentapeptide as minimal antigenic determinant for MHC class I-restricted T lymphocytes

Peptides that are antigenic for T lymphocytes are ligands for two receptors, the class I or II glycoproteins that are encoded by genes in the major histocompatibility complex, and the idiotypic / chain T-cell antigen receptor1–9. That a peptide must bind to an MHC molecule to interact with a T-cell antigen receptor is the molecular basis of the MHC restriction of antigen-recognition by T lymphocytes10,11. In such a trimolecular interaction the amino-acid sequence of the peptide must specify the contact with both receptors: agretope residues bind to the MHC receptor and epitope residues bind to the T-cell antigen receptor12,13. From a compilation of known antigenic peptides, two algorithms have been proposed to predict antigenic sites in proteins. One algorithm uses linear motifs in the sequence14, whereas the other considers peptide conformation and predicts antigenicity for amphipathic -helices15,16. We report here that a systematic delimitation of an antigenic site precisely identifies a predicted pentapeptide motif as the minimal antigenic determinant presented by a class I MHC molecule and recognized by a cytolytic T lymphocyte clone