ERGO-ANALYSIS OF SCHOOL FURNITURE IN USE BY SECONDARY SCHOOL STUDENTS IN SOUTH WESTERN NIGERIA

The anthropometric data of the students in secondary schools was obtained and possible mismatch between the relevant dimensions of students and the classroom furniture they use were examined.A total of 480 students in Junior Secondary 1 through Senior Secondary 3 in sixteen (Eight Public and Eight Private) Secondary Schools participated in the study with ages ranging from 10 years to 18 years. Fourteen anthropometric measurements and the dimensions of four types of chairs and four types of desks prevalent in the students' classrooms were measured. The means, standard deviations, fifth, fiftieth and ninety fifth percentiles were calculated. The anthropometric dimensions of the students in the public schools were statistically compared with those in the private schools with use of SPSS 16.0 Statistical Package. Moreover, the student body dimensions and furniture dimensions were compared. The results show that that all the measured dimensions of the students in the public schools (Popliteal Height: 39.5 cm, Sitting Height: 77.3 cm, Knee Height: 53.0 cm, Elbow Height Sitting: 16.0 cm, Buttock-Popliteal Length: 43.8 cm; using the 50th percentiles) and private schools (Popliteal Height: 40.2 cm, Sitting Height: 80.3 cm, Knee Height: 53.3 cm, Elbow Height Sitting: 16.5 cm, Buttock-Popliteal Length: 44.0 cm; using the 50th percentiles) were not significantly different (p = 0.00) except Buttock-Popliteal Length (p = 0.08) and Hip Breadth (p = 0.12). Moreover, a degree of mismatch between the students' bodily dimensions and the classroom furniture available to them was established. It was concluded that the anthropometric data of the .Nigerian Students were not employed in the manufacture of the school furniture and may be an indication that school furniture and students anthropometric dimensions are at variant nationwide

Theoretical Circular Dichroism Spectra of the α-Helical Protein Calexitin with the Dipole Interaction Model Including the n-π* Transition

Circular dichroism (CD) is an important structural biology technique used to study protein dynamics, and most especially the secondary structure of peptides and proteins. Although CD is a technique that is relatively easy to introduce to undergraduate students, the high cost of obtaining a conventional CD instrument and the time required for sample preparation prevents a good number of students from having hands-on experiments demonstrating the principle of CD. Herein, theoretical circular dichroism with the dipole interaction model, DInaMo, is proposed as a tool for introducing students to CD. Using the dipole interaction model, the CD spectra of an α-helical protein, calexcitin, is predicted with a good morphology, and peak intensity and location of the π– π* transition. The n–π* transition is well approximated with normal modes obtained in the correct location and sign

Crystal Structure of N-Allyl-4-Methylbenzenesulfonamide

The title compound, C10H13NO2S, was synthesized by a nucleophilic substitution reaction between allyl amine and p-toluenesulfonyl chloride. The sulfonate S— O bond lengths are 1.4282 (17) and 1.4353 (17) A˚ , and the C—N—S—C torsion angle involving the sulfonamide moiety is 61.0 (2). In the crystal, centrosymmetric dimers of the title compound are present via intermolecular N—H...O hydrogen bonds between sulfonamide groups. These dimers are linked into ribbons along the c-axis direction through offset pi–pi interactions