Liquid paraffin

About: Liquid paraffin is a research topic. Over the lifetime, 6185 publications have been published within this topic receiving 52956 citations.

Experimental investigation on thermal conductivity of nanofluids containing graphene oxide nanosheets

Abstract: Nanofluids containing graphene oxide nanosheets have substantially higher thermal conductivities than the base fluids. The thermal conductivity enhancement ratios with the loading 5.0 vol % are up to 30.2%, 62.3%, and 76.8%, when the base fluids are distilled water, propyl glycol and liquid paraffin, respectively. The enhancement ratios of the nanofluids are almost constant with the tested temperature varying, and they are reduced with the increasing thermal conductivity of the base fluids. Heat transport along the graphene oxide plane is proposed to be the major contributions to the increase in the thermal conductivity.

Stable efficient CdSe/CdS/ZnS core/multi-shell nanophosphors fabricated through a phosphine-free route for white light-emitting-diodes with high color rendering properties

Abstract: Highly-fluorescent CdSe/CdS/ZnS core/multi-shell quantum dot (QD) nanophosphors were successfully synthesized via a phosphine-free and continual precursor injection method in paraffin liquid for the first time. The as-prepared cubic zinc blended QDs showed high photoluminescent quantum yield (PLQY) and excellent optical stability. We also fabricated QDs/epoxy composites by directly dispersing the core/multi-shell QDs into epoxy resin as the encapsulating and light conversion materials for the application on the white light LED, and the as-prepared composites possessed even better stability against UV radiation and heating. Moreover, a white light LED was fabricated by combining QDs/epoxy composites incorporated with green, yellow and red emission QDs with blue InGaN LED, and the resulting four-band RYGB QD-WLED showed good performance with a CIE-1931 coordinates of (0.35, 0.37), Ra of 88, Tc of 3865 K and the power efficiency (PE) of 32 lm W−1 at 100 mA, indicating that the combination of highly fluorescent CdSe/CdS/ZnS core/multi-shell QDs in LEDs can be a promising solution for white light sources with high color rendering properties.

Tea tree oil reduces histamine-induced skin inflammation.

Abstract: Summary Background Tea tree oil is the essential oil steam-distilled from Melaleuca alternifolia , an Australian native plant. In recent years it has become increasingly popular as an antimicrobial for the treatment of conditions such as tinea pedis and acne. Objectives To investigate the anti-inflammatory properties of tea tree oil on histamine-induced weal and flare. Methods Twenty-seven volunteers were injected intradermally in each forearm (study and control assigned on an alternating basis) with histamine diphosphate (5 µg in 50 µL). Flare and weal diameters and double skin thickness were measured every 10 min for 1 h to calculate flare area and weal volume. At 20 min, 25 µL of 100% tea tree oil was applied topically to the study forearm of 21 volunteers. For six volunteers, 25 µL paraffin oil was applied instead of tea tree oil. Results Application of liquid paraffin had no significant effect on histamine-induced weal and flare. There was also no difference in mean flare area between control arms and those on which tea tree oil was applied. However, mean weal volume significantly decreased after tea tree oil application (10 min after tea tree oil application, P = 0·0004, Mann–Whitney U-test). Conclusions This is the first study to show experimentally that tea tree oil can reduce histamine-induced skin inflammation.