Fruits are sweet fleshy products of a plants, that contain various nutrients and when consumed help the human in diverse ways. Some build up muscles, some burst immune system, some are anti-oxidant and amongst other functions. Because of the high commercial demand, naturally ripe fruits are scarce, thus; alternative (artificial) ways of making them ripe for consumption has become inevitable and uncontrollable. The aim of this study is to evaluate the effect of Calcium Carbide ripened fruit (Pawpaw) on the Haematological parameters of the Wistar rats. Mature unripe pawpaw’s were plucked off from the parent plant and were divide into two groups, one group was kept and allowed to rip at normal room temperature and the other group was induced with Calcium Carbide to ripe for 48 hours.10g of the CaC2 was placed in a bowl and 5ml of water was used to dissolved it in a closed metal bucket containing 1kg of the fruit [Pawpaw] rapped with black nylon and was allowed for two days [48 hours] for ripening. After ripening, sampled fruits were washed and juiced. 600g of both the naturally ripened and calcium carbide induced ripened fruits [Pawpaw] were peeled separately and blended in an electric blender with 350ml/1L of deionized water. The two sets of juice was filtered with a clean fine sieve and was poured into clean bottles labeled [CaC2 ripened and naturally ripened pawpaw juice]. A total of 21 adult Wister rats of both sexes weighing between 126.9g- 213.3g were used for this study. 9 Wistar rats were used for Sub Acute Test ( LD50). The rest 12 Wistar rats were divided into three groups (Control, Natural and CaC2). 5ml/kg of the naturally ripened and calcium carbide induced ripened fruits [Pawpaw] were administered orally to the rats based on the body weight. The rats were weighed weekly, then one rat was sacrificed in each group and blood samples were collected from the three groups for hematological analysis. The result showed reduction in mean Pack Cell Volume, Total White Blood Count, Hemoglobin, Red Blood Cells, Platelets, Neutrophil, Monocytes for both the Wistar rats fed with Naturally ripened and CaC2 ripened groups in comparison with the control group. There is evidence of increase in the mean Lymphocytes level for both the Wistar rats fed with Naturally ripened and CaC2 ripened groups in comparison with the control group, but the CaC2 treated group tend to be higher. Eosinophil levels is higher in the CaC2 treated group. In a nutshell, The consumption of fruits ripened with Calcium Carbide pose devastating effect on the bone marrow, deleterious effect on the circulating blood, heart and brain, that will evenly lead to myocardiac infarction, Eosinophilia, Anemia, thrombocythopenia, paralysis, stroke, seizure and mortality may eventually arise.

This study was conducted to determine the effect of audio-visual technology on students’ academic achievement and interest in electrical installation and maintenance works in Technical Colleges in Anambra State. The design of the study was quasi-experimental design involving pretest, posttest non-randomized control groups. The study was carried out in technical colleges in Anambra State. The population of the study was 316 (150 males and 166 females) students purposively sampled from two technical colleges that have male and female students in the state. The instrument for data collection was electrical installation and maintenance works achievement test (EIMWAIT) and interest scale adapted by the researchers from the NABTEB past questions between 2010 and 2020. Due to the fact that the instrument was standardized (past examination questions), no further validation was made. Reliability of the instrument was determined using Kuder-Richardson Formula 21 with a reliability coefficient of 0.77 was obtained. Data collected were analyzed using mean scores to answer the research questions and Analysis of Covariance (ANCOVA) to test the null hypotheses at 0.05 level of significance and appropriate degree of freedom. The study revealed among others that students in experimental group achieved higher than those in control group. There is a significant difference in the mean achievement scores of students taught electrical installation and maintenance works with audio-visual technology as compared to those taught with conventional method. Thus, it was recommended that there should be a regulatory policy to encourage absorbance of female students into electrical installation and maintenance works trade.