More thani a year ago I observed that the addition of a trace ot formaldehyde to acetic acid, which had beeni deprived by distillation' of its power to give, with sulphuric acid, Adamkiewicz'st reaction for proteids, restored to it its chromogenic power in a very markecd degree. As would be expected, it was found that the acetic acid was Inot essenitial, the formaldehyde, proteid anid sulphuric...

Available sources of portable water for drinking, domestic and industrial chores in Nigeria are dwindling because of concomitant increase in population, urbanization and industrial activities. This study assessed the qualities of Surface Water (SW), Sediment (SD) and Tilapia Fish (Oreichromis niloticuss) (TF) samples collected from Asejire, Oni, Ona, Ogun, Ogunpa, Eleyele and Majidun rivers and...

This letter introduces the notion of linear Discrete-time Output Negative Imaginary (D-ONI) systems. The D-ONI class is defined in z-domain and it includes systems having poles on unit circle. proposed definition involves a real parameter δ ≥ 0, which indicates strictness properties. > 0 specifies strict subset, Strictly (D-OSNI), within stable class. Interestingly, new captures existing D-NI w...

Malaysia’s location in Southeast Asia exposes it to various weather patterns influenced by El Niño–Southern Oscillation (ENSO), monsoons, the Madden–Julian (MJO), and Indian Ocean Dipole (IOD). To overcome limitations of previous studies due insufficient spatial information, this study utilizes remote sensing (RS) data from Landsat MODIS satellites, along with Oceanic Niño Index (ONI), analyze ...