Babesiosis, an haemoparasitic disease caused by Babesia spp and transmitted by ticks is one of the major public health threat to cattle rearing in most countries, including Nigeria. The disease impose a serious burden on the healthcare infrastructure of both the cattle and their handlers. This study therefore investigated the prevalence of Babesiosis and other haemoparasitic disease in a cattle slaughtering abattoir in Abeokuta, Ogun State, Nigeria. A total of 162 cattle were examined between May and August 2014. Blood samples were collected from the jugular vein of the cattle at point of slaughter in bottles containing ethylene diamine tetraacetic acid (EDTA) and transported to the laboratory for parasitological examination. Using microscopy, prepared Giemsa stained slides were observed under high powered digital Swift™ microscope at 4,500,000 resolution and x100 objective lens. Of the 162 cattle sampled, 83(51.2%) were males and 79(48.8%) were females. An overall prevalence of 27.8% was recorded for haemoparasites such as Babesia spp (8.0%), Trypanosoma spp (1.9%), Theileria spp (9.3%) and Anaplasma spp (18.5%). There was no sex and

No abstract

Corrosion inhibition of water extract of Spondias mombin on low carbon steel in 0.5 M sulphuric acid was investigated in this paper. Fresh leaves, fruits and bark of this plant, washed properly, ground separately using small amount of distilled water to extract the juice at a ratio of 500 ml (distilled water) to 1 kilogram of plant were used for this experiment. Corrosion inhibitors of 0.4 g/ml, 1 g/ml and 2 g/ml were made from the filterate. Low carbon steel coupons suspended with twine inside 250 ml container of 0.5 M sulphuric acid in the presence of different concentrations of the extracts at room temperature for 35 days. The coupons were retrieved at 7 days interval, and the initial and final weights were recorded.  Inhibition efficiency for the leaves extract increased with concentration and got to its peak on the 7th day, that of the fruits extract initially increased with concentration until 1 g/ml after which there was a decline, its highest value was also recorded on the 7th day. The best inhibition efficiencies (in the range of 76.32% to 83.21%) for Spondias mombin water extract were observed in 0.4 g/ml bark extract throughout the days of the experiment, the highest being recorded on the14th day. It can be concluded that Spondias mombin water extract is a good corrosion inhibitor of low carbon steel in 0.5 M sulphuric acid at room temperature, with the best being the bark extract which inhibited for up to 35 days.

SAŽETAK: Studija procjenjuje čimbenike ergonomskih rizika na poslovima održavanja plinske elektrane kapaciteta 8.4 MW (1.4 MW x 6 jedinica) u kojoj na održavanju radi 12 osoba. Čimbenici ergonomskih rizika mogu se podijeliti na one povezane sa zadatkom, te osobne i okolišne. Potencijalna ozbiljnost svih utvrđenih čimbenika rizika i vjerojatnost da se ostvare prikazana je na ljestvici 1-5. Indeks rizika izračunat je kao umnožak vjerojatnosti pojave rizika i potencijalne ozbiljnosti svih parametara rizika. Relativne težine parametara čimbenika rizika utvrđene su dijeljenjem svakog indeksa kumulativnog rizika s ukupnim indeksom kumulativnog rizika. Relativne težine čimbenika ergonomskih rizika utvrđene su dijeljenjem indeksa kumulativnih rizika svakog čimbenika s ukupnim indeksima kumulativnog rizika. Ukupan indeks rizika za svaki čimbenik izračunat je zbrajanjem umnoška relativnih težina i indeksa rizika parametara koji čine taj čimbenik. Indeks opasnosti na radu (WSI) utvrđen je zbrajanjem umnoška relativnih težina i indeksa rizika čimbenika ergonomskih čimbenika. Vrijednosti rizika kategorizirane su u tri razreda: nizak, srednji i visok rizik. Koristeći osobne i okolišne čimbenike, prosječne vrijednosti rizika iznosile su 3.03 ± 0.42 i 3.00 ± 0.00 iz čega proizlazi da je posao niskog rizika. Vrijednost indeksa opasnosti na radu (WSI) iznosila je 5.03 ± 1.62 što je pokazatelj da posao održavanja na način kako se obavlja u promatranoj elektrani predstavlja nizak rizik.

Quick Return Mechanisms (QRMs) are one of the essential accessories used in machine tools which involve reciprocating cutting action with a quick return stroke and a constant angular velocity of driving crank. The aim of this work was to simulate, design and construct a prototype of a QRM that can be used for demonstration and instrumentation. The QRM was simulated using Solidworks and a prototype was developed from the simulated results. The experiment was conducted using the prototype. The kinematic simulation of the Solidworks model was compared with the kinematics of motion of the prototype. The result showed that the Percentage Stroke Length error was 0.36%. It was observed that, there was no significant difference in the simulated and experimental results, hence, the prototype can be used for demonstration and experimentation to assist students in understanding basic principles of the machine operation.