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- 저자 : Angmo, Dechan (검색결과 3 건)
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Sensory attributes and consumer appreciation of fresh apricots with white seed coats
Avilekh Naryal,Stanzin Angmo,Phunchok Angmo,Anil Kant,O. P. Chaurasia,Tsering Stobdan 한국원예학회 2019 Horticulture, Environment, and Biotechnology Vol.60 No.4
Forty-seven apricot genotypes with white and brown seed coats were analyzed by both sensory and instrumental methods. The overall appreciation of apricots was mainly aff ected by attributes such as aroma, sweetness, juiciness, fl esh color, stone color, and fruit shape and size. In terms of these attributes, fruits with white seed coats ranked fi rst, scoring the highest hedonic score for overall appreciation (8.0 ± 0.2). They also had the highest total soluble solid (TSS) (27.5 ± 3.6°Brix), reducing sugar (17.5 ± 1.9%), and total sugar (20.3 ± 1.9%) values, while the moisture content (68.9 ± 8.3%) was the lowest among the analyzed genotypes. Consumers were attracted to the unique white seed coat phenotype. Relationships between data obtained by the sensory panel and instrumental methods were established. Overall appreciation showed positive signifi cant relation with TSS (R 2 = 0.177, p ≤ 0.01), TSS/total acid (R 2 = 0.118, p ≤ 0.05), reducing sugar (R 2 = 0.140, p ≤ 0.01), total sugar (R 2 = 0.177, p ≤ 0.01), and fruit weight (R 2 = 0.230, p ≤ 0.001). Statistically signifi cant negative relation was observed between overall appreciation and fruit moisture content (R 2 = 0.168, p ≤ 0.01). The study demonstrated that white seed coat phenotype can be considered a marker for high-quality apricots in terms of aroma, sweetness, juiciness, and overall appreciation.
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Heo, Youn-Jung,Kim, Jueng-Eun,Weerasinghe, Hasitha,Angmo, Dechan,Qin, Tianshi,Sears, Kallista,Hwang, Kyeongil,Jung, Yen-Sook,Subbiah, Jegadesan,Jones, David J.,Gao, Mei,Kim, Dong-Yu,Vak, Doojin Elsevier 2017 Nano energy Vol.41 No.-
<P><B>Abstract</B></P> <P>We report organic cation additives in lead iodide solutions as a practical approach for roll-to-roll production of perovskite solar cells. Sequential deposition, which is known to be more reliable than 1 step process, is modified to be even more reliable and suitable in roll-to-roll process. Addition of less than stoichiometric amount of organic cations in PbI<SUB>2</SUB> solution effectively improves processability by working as crystallization retardant and make dried PbI<SUB>2</SUB> film more reactive for faster conversion to perovskite. The printing-friendly sequential deposition is used in air with slot die coating, an industrial up-scaling technique, to produce a perovskite solar cell on glass with a 14.4% power conversion efficiency (PCE). The process is then used in actual roll-to-roll machine in air to produce flexible perovskite solar cells with up to 11.0% PCE.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Conventional sequential deposition is modified to be more suitable for roll-to-roll process. </LI> <LI> Reactive intermediate shows more rapid conversion to perovskite than conventional PbI<SUB>2</SUB> intermediate. </LI> <LI> Fully slot die coated perovskite solar cells under ambient condition shows a power conversion efficiency of 14.4%. </LI> <LI> Roll-to-roll processed flexible perovskite solar cells show power conversion efficiency of 11%. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
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Yu, Jong-Su,Kim, Inyoung,Kim, Jung-Su,Jo, Jeongdai,Larsen-Olsen, Thue T,Søndergaard, Roar R,Hö,sel, Markus,Angmo, Dechan,Jørgensen, Mikkel,Krebs, Frederik C RSC Pub 2012 Nanoscale Vol.4 No.19
<P>Semitransparent front electrodes for polymer solar cells, that are printable and roll-to-roll processable under ambient conditions using different approaches, are explored in this report. The excellent smoothness of indium-tin-oxide (ITO) electrodes has traditionally been believed to be difficult to achieve using printed front grids, as surface topographies accumulate when processing subsequent layers, leading to shunts between the top and bottom printed metallic electrodes. Here we demonstrate how aqueous nanoparticle based silver inks can be employed as printed front electrodes using several different roll-to-roll techniques. We thus compare hexagonal silver grids prepared using either roll-to-roll inkjet or roll-to-roll flexographic printing. Both inkjet and flexo grids present a raised topography and were found to perform differently due to only the conductivity of the obtained silver grid. The raised topographies were compared with a roll-to-roll thermally imprinted grid that was filled with silver in a roll-to-roll process, thus presenting an embedded topography. The embedded grid and the flexo grid were found to perform equally well, with the flexographic technique currently presenting the fastest processing and the lowest silver use, whereas the embedded grid presents the maximally achievable optical transparency and conductivity. Polymer solar cells were prepared in the same step, using roll-to-roll slot-die coating of zinc oxide as the electron transport layer, poly-3-hexylthiophene:phenyl-C(61)-butyric acid methyl ester (P3HT:PCBM) as the active layer and poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) as the top electrode, along with a flat bed screen printed silver grid. The power conversion efficiency (PCE) obtained for large area devices (6 cm(2)) was 1.84%, 0.79% and 1.72%, respectively, for thermally imprinted, inkjet and flexographic silver grids, tested outside under the real sun. Central to all three approaches was that they employed environmentally friendly solvents, i.e. water based nanoparticle silver inks.</P>
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