Effects of poly(dimethyl siloxane) on the water absorption and natural degradation of poly(lactic acid)/oil-palm empty-fruit-bunch fiber biocomposites

Possible Association Between Nickel and Multiple Osteomas of the Mandible in a Gir Bullock

A 10-year-old Gir bullock was presented with four contiguous hard nodular submucosal masses attached to the right rostral mandible. Overgrown masses were resected surgically and submitted for microstructural, elemental, and molecular spectroscopic analyses. An osteoma was diagnosed histopathologically. Elemental analysis by energy dispersive X-ray fluorescence spectroscopy revealed the presence of Ca, P, Sr, S, Zn, Cu, Ni, and Fe. Levels of the trace elements Fe, Zn, and Cu in the mandible mass were 2.39, 1.86, and 1.25 times higher, respectively, than those of normal bone. Nickel was detected in the mandible mass, but not in the normal bone. Molecular Fourier transform infrared spectroscopy confirmed the presence of inorganic ν₂ CO₃^2-, ν₃ PO₄^3-, and OH^- in addition to organic collagen amide B, amide I, amide II, and amide III chemical functional groups. Multiple osteomas of the mandible in humans are a feature of Gardner syndrome and have not been recognized in animals so far. This could be the first report of multiple osteomas of the mandible in a Gir bullock associated with nickel-induced epigenetic mutation.

Microscopic and spectroscopic characterization of an extraskeletal intranasal osteoma in a Gir cow

This is probably the first report characterizing an extraskeletal intranasal osteoma in a Gir cow through scanning electron microscopy and various spectroscopic techniques. Nasal obstruction in a 10-year-old Gir cow is investigated in this study. Skull radiograph demonstrated 174.12 mm × 81.97 mm sized well-circumscribed radiodense mass within the left nasal passage. The intranasal mass was excised completely through a rhinotomy incision. Grossly, intranasal mass was nonhyperemic, rock-hard, and calcified, 174.12 mm × 81.97 mm in size, and 650 g of weight. Excised intranasal mass was investigated through histopathologic, scanning electron microscopic (SEM), energy-dispersive X-ray (EDX) spectroscopic, X-ray fluorescence (XRF) spectroscopic, microwave plasma-atomic energy spectroscopic (MPAES), and Fourier-transform infrared (FTIR) spectroscopic techniques. A native bone of age-matched Gir cow, collected from a cadaver, was taken as a control. Microscopically, structures similar to cortical bone randomly coexisted with trabecular bone were observed. The EDX analysis of the intranasal mass indicated mean Ca/P weight ratio of 1.88, close to Ca/P weight ratio of the control. The XRF analysis revealed the presence of Ca, P, Sr, S, Zn, Cu, Fe, and Ni in the intranasal mass. Additionally, Mn was noted by MPAES analysis. Hence, the XRF and MPAES analyses confirmed a similar elemental composition of the intranasal mass and control. FTIR spectroscopic study confirmed the presence of inorganic ν_1, ν₃ PO₄ ^3- , OH^- in addition to organic collagen amide A, amide B, amide I, amide II, and amide III chemical functional groups in the intranasal mass. These findings of the intranasal mass were consistent with an osteoma having similar elemental and molecular compositions with the native bone.