scholarly journals Design of a DC-DC Converter for Portable Device

2017 ◽  
Vol 22 (2) ◽  
pp. 71-78
Author(s):  
Ja-kyeong Lee ◽  
Han-Jung Song
Keyword(s):  
Portable Device

Quantification of Vitamin A in Fortified Rapeseed, Groundnut and Soya Oils Using a Simple Portable Device: Comparison to High Performance Liquid Chromatography

2013 ◽  
Vol 83 (2) ◽  
pp. 122-128 ◽  
Author(s):  
Cécile Renaud ◽  
Jacques Berger ◽  
Arnaud Laillou ◽  
Sylvie Avallone
Keyword(s):  
High Performance Liquid Chromatography ◽  
Liquid Chromatography ◽  
Vitamin A ◽  
High Performance ◽  
Vitamin A Deficiency ◽  
Developed Countries ◽  
Portable Device ◽  
Least Developed Countries ◽  
Control Food ◽  
Assay Precision

Vitamin A deficiency is still one of the major public health problems in least developed countries. Fortification of vegetable oils is a strategy implemented worldwide to prevent this deficiency. For a fortification program to be effective, regular monitoring is necessary to control food quality in the producing units. The reference methods for vitamin A quantification are expensive and time-consuming. A rapid method should be useful for regular assessment of vitamin A in the oil industry. A portable device was compared to high-performance liquid chromatography (HPLC) for three plant oils (rapeseed, groundnut, and soya). The device presented a good linearity from 3 to 30 mg retinol equivalents per kg (mg RE.kg- 1). Its limits of detection and quantification were 3 mg RE.kg- 1 for groundnut and rapeseed oils and 4 mg RE.kg- 1 for soya oil. The intra-assay precision ranged from 1.48 % to 3.98 %, considered satisfactory. Accuracy estimated by the root mean squares error ranged from 3.99 to 5.49 and revealed a lower precision than HPLC (0.4 to 2.25). Although it offers less precision than HPLC, the device estimates quickly the vitamin A content of the tested oils from 3 or 4 to 15 mg RE.kg- 1.

Same Time Detection of PM2.5 and Location Data by Android Portable Device

2016 ◽  
Vol 136 (5) ◽  
pp. 142-147
Author(s):  
Yusuke Harada ◽  
Yoshinori Matsumoto
Keyword(s):  
Portable Device ◽  
Location Data

scholarly journals A portable device for water-sloshing-based electricity generation based on charge separation and accumulation

iScience ◽  
2021 ◽  
Vol 24 (5) ◽  
pp. 102442
Author(s):  
Jihoon Chung ◽  
Deokjae Heo ◽  
Kyunghwan Cha ◽  
Zong-Hong Lin ◽  
Jinkee Hong ◽  
...  
Keyword(s):  
Charge Separation ◽  
Electricity Generation ◽  
Portable Device

A Portable Device for Continuous Analysis of Dissolved Gaseous Mercury in Natural Waters

2005 ◽  
Vol 26 (11) ◽  
pp. 1303-1308 ◽  
Author(s):  
L. Fantozzi ◽  
R. Ferrara ◽  
E. Lanzillotta
Keyword(s):  
Natural Waters ◽  
Portable Device ◽  
Continuous Analysis ◽  
Gaseous Mercury ◽  
Dissolved Gaseous Mercury
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