A preliminary study of the measurement of slice-width dose profiles (SWDP) on diagnostic x-ray CT scanners using PAGAT polymer gel dosimeters with optical CT read-out

Targeting cleaning of the artificial gypsum layer on white marble was studied. It was conducted by means of the specific depletion of the calcium and sulfate ions by the barium carbonate scavenger, which led to the continuous dissolution and clearance of gypsum layer. The cleaning effect was evaluated by scanning electron microscopy with energy dispersive X-ray spectroscopy (SEM/EDX), X-ray diffraction (XRD), capillary suction, and color difference measurement. By this method, only the gypsum layer was cleared away and the carbonate substrate of marble was left intact at the same time. This method will be highly useful for the conservation of marble relics from surface weathering.

Download Full-text

Preliminary Study of Alginates Extracted from Brown Algae (Sargassum sp.) Available in Madura Island as Composite Based Hydrogel Materials

Materials Science Forum ◽

10.4028/www.scientific.net/msf.964.240 ◽

2019 ◽

Vol 964 ◽

pp. 240-245 ◽

Cited By ~ 1

Author(s):

Amaliya Rasyida ◽

Thalyta Rizkha Pradipta ◽

Sigit Tri Wicaksono ◽

Vania Mitha Pratiwi ◽

Yeny Widya Rakhmawati

Keyword(s):

Sodium Alginate ◽

Brown Algae ◽

Extraction Process ◽

Composition Analysis ◽

3D Printer ◽

X Ray Diffraction ◽

X Ray ◽

3D Printed ◽

Preliminary Study

Utilization of brown algae especially in Madura, where it’s close to Surabaya, only limited for food. This become a reference for developing and increasing the potential of this algae by extracting one of the ingredients, namely alginate. This paper deals with the characterization of sodium alginate extracted from sargassum sp. using modified-purified calcium routes. The extracted sodium alginate will be further used as composite hydrogel materials and compared with commercial sodium alginate. Hereafter, the synthesized composite is expected to be bio-ink for 3d printer. Chemical composition analysis were analyzed using X-Ray Fluorosense (XRF) followed by Fourier-transform infrared spectroscopy (FTIR) analysis to identify the functional group of composite and X-Ray Diffraction (XRD). Furthermore, viscosity bath is performed to compare the viscosity of extracted and commercial one. The result shows that modified-purified calcium routes in the extraction process of sodium alginate is desirable for improving their properties. Interestingly enough, with the goal of using it as bio-ink in 3d printed fabrication, the synthesized composite shows viscosity, 300 cSt, which meets the criteria for bio-ink in 3d printer.

Download Full-text

A preliminary study on antifungal effect of TiO2-based paints in natural indoor light

Polish Journal of Chemical Technology ◽

10.2478/v10026-010-0050-x ◽

2010 ◽

Vol 12 (4) ◽

pp. 53-57 ◽

Cited By ~ 9

Author(s):

Agata Markowska-Szczupak ◽

Krzysztof Ulfig ◽

Barbara Grzmil ◽

Antoni Morawski

Keyword(s):

Antifungal Activity ◽

Aspergillus Niger ◽

Trichoderma Viride ◽

Photocatalytic Reaction ◽

X Ray Diffraction ◽

Antifungal Effect ◽

X Ray ◽

Preliminary Study ◽

Crystalline Forms ◽

Growth Of Fungi

A preliminary study on antifungal effect of TiO2-based paints in natural indoor light The antifungal activity of four commercial photocatalytic paints (KEIM Ecosil ME, Titanium FA, Photo Silicate and Silicate D) in natural indoor light was investigated. The paints contained TiO2 in rutile and anatase crystalline forms as evidenced by means of the X-ray diffraction analysis. In most cases the paints inhibited growth of fungi viz. Trichoderma viride, Aspergillus niger, Coonemeria crustacea, Eurotium herbariorum, and Dactylomyces sp. The KEIM Ecosil ME paint displayed the highest antifungal effect in the light, which could be explained with the highest anatase content. The paint antifungal activity and the fungal sensitivity to the TiO2-mediated photocatalytic reaction both decreased in the following orders: KEIM Ecosil ME > Titanium FA > Photo Silicate > Silicate D and T. viride > Dactylomyces sp. > A. niger > E. herbariorum.

Download Full-text