Assessment of various physico-chemical and biological properties of seed powder of Sida cordifolia was done. This plant grows along roadsides and in open land in tropical climates. Mainly useful plant parts are seeds, leaves and roots. The loose bulk density, tapped bulk density, hausner ratio and angle of repose of sample were found to be 0.31g/cm3±0.1, 0.38 g/cm3± 0.2, 1.22%± 1.6 and 30.96°± 0.7, respectively. Moisture content of sample was found to be 10.00±1.6. Total ash, fat, total protein and non protein nitrogen was 3.80% ± 0.5, 10.56% ± 0.3, 22.00% ± 0.9 and 11.20% ± 0.4, respectively. Thermal stability of seeds was up to 200°C. Low molecular weight protein bands ranging 10–60 kDa were identified. The demonstration of antimicrobial activity against microbes may be indicative of the presence of broad spectrum antimicrobial compounds. Amide I and amide II bands were two major bands of the infrared spectrum. This powder has very low water absorption capacity.

Professor Dr Henry H. Hausner (1900–1995)

Physico-chemical and biological properties of seed powder of flannel weed

Developing new polymer composites with special properties for 3D printing is one of the most attractive tasks. In our study, we have developed new polymer powders based on rGO-coated polyamide suitable for Selective Laser Sintering (SLS) printing. The obtained materials were characterized using optical microscopy, UV-Vis spectroscopy, scanning electron microscopy and dielectric spectroscopy. The size distribution of the powder particles, the angle of rest after an avalanche, the compactibility (Hausner ratio), the optical properties (absorption and transmission) of the powder monolayer, and the electrical conductivity of the obtained materials have been studied. It has been shown that the developed powders are suitable for the use in the framework of the SLS method, and can be applied to remove static electricity, as well as in reflective screens for electromagnetic radiation.

Professor Dr Henry H. Hausner (1900–1995)

Citations

Physico-chemical and biological properties of seed powder of flannel weed

Powders of rGO-coated polyamide with special electrical properties for SLS 3D printing