• Journal of the Korean Society of Food Culture
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• v.37 no.4
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• pp.345-353
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• 2022

This study compared the physicochemical and gelatinization properties of naked barley, tetrastichum barley, and waxy barley. Compared to tetrastichum barley and waxy barley, naked barley had shorter and rounder grains with a 1.43 length/width ratio. Tetrastichum barley had lower crude protein, crude lipid, and crude ash content and higher amylose content compared to naked barley and waxy barley. The L, a, b color values of waxy barley were significantly higher than those of naked barley and tetrastichum barley. The water absorption index (WAI) and the water soluble index (WSI) were highest in waxy barley. The X-ray diffraction pattern was type A in all samples, and the peak intensity was highest in waxy barley. The maximum viscosity, cooling viscosity, breakdown, and setback of amylogram properties were the highest in tetrastichum barley. The thermal properties through the differential scanning calorimeter showed that the waxy barley had higher values of the onset, peak, conclusion temperature and enthalpy (?H). In conclusion, the variety of barley influenced the physicochemical and gelatinization properties, which could be important factors in the manufacture of processed foods. These results would thus useful inputs for the manufacturing of these foods using barley.

• Bulletin of the Korean Chemical Society
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• v.31 no.5
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• pp.1204-1208
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• 2010

Anion recognition via hydrogen-bonding interactions could be monitored with changes in UV-vis absorption spectra and in some cases easily monitored with naked eye. Urea receptors 1 and 2 connected with both an azo group and a nitrophenyl group as a signaling group for color change proved to be an efficient naked eye receptor for the fluoride ion. The anion recognition phenomena of the receptors 1 and 2 via hydrogen-bonding interactions were investigated through UV-vis absorption and $^1H$ NMR spectra.

• Atmosphere
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• v.28 no.1
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• pp.69-83
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• 2018

Most of the researches on fog in South Korea have been done based on the naked-eye observation but the number of observation sites is just 22. Considering the localities of fog and various durations, it is essential to utilize more than 250 visibility meters that measure visibility every minute. In this study, the visibility characteristics of visibility meters were compared with that of the naked-eye observation using one year data, 2016, and radiation fog and advection fog cases were analyzed in detail. The concordance rate of the two data set was 0.96~0.97, but discordance rate was 0.19~0.47. In general, visibility meters observed fog more frequently than naked-eye. The correlation between two data sets is clearly dependent on the visibility and geographic locations (fog/thick fog (< 100 m) of inland: 0.86/0.61; fog/thick fog: 0.65/0.73 of island/coastal site). In both fog cases, the fog events observed by naked-eye were consistently detected by visibility meters, and visibility meters clearly well detected very short fog/thick fogs. Formation and dissipation time of fog for the fog cases were similar but fog duration by visibility meters was shorter because of exclusion of temporary dissipated time. In addition, the visibility meters showed a detailed distribution of fog events that occurred simultaneously over South Korea. It would be useful to analyze the spatial and temporal characteristics of, in particular, thick fog using visibility meters. However, more works are needed for the filtering criteria for analyzing fog using visibility meters alone.

• Textile Coloration and Finishing
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• v.25 no.1
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• pp.65-69
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• 2013

PET fabrics of various luster, fiber thickness(denier), and weaving structure were dyed at the same conditions and determined their grey scale by using naked eyes, computer color matching (CCM) system, and real industry color (RIC) device to evaluate the effectiveness of RIC device developed in this study. As for the luster of fabrics, bright PET showed more differences when compared with semi-dull and full-dull. PET in both naked eyes and RIC device since the RIC device provide the real image of fabrics to observers. As for the fiber thickness, the results of naked eyes and RIC device were very similar while the result of CCM showed lower color grade. Finally, as for the weaving structures of PET fabrics, all the test results by naked eyes, CCM, and RIC device showed almost same grey scales. In these regards, the RIC device developed in this study was comparable to naked eyes by providing the real image of fabrics, however it was difficult to compare the very bright colors such as yellow and fiber thickness(denier) and weaving structure of fabrics.

• Microbiology and Biotechnology Letters
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• v.14 no.5
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• pp.415-420
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• 1986

Alcohol fermentation of uncooked naked barley was carried out by the combined action of the maceration enzyme from black Aspergillus niger and the glucoamylase from Rhizopus sp. The combined enzyme preparation was found to be effective in maceration and saccharification of the raw naked barley starch. The Hydrolysis rate measured by the amount of glucose liberated reached more than 70% at pH 4.5 and 3$0^{\circ}C$ after 76 hrs. For alcohol fermentation without cooking, the naked barley mash of 18% initial total sugar was pretreated with concentrated sulfuric acid (0.15 weight % of the mash volume) at 55$^{\circ}C$ for 2hr, and used for alcohol fermentation. A simultaneous saccharification and fermentation was carried out at pH 4.8 and 3$0^{\circ}C$ for 96 hrs. Under this fermentation condition, 3.5% increase in alcohol yield together with 2.0% increase in alcohol concentration were obtained when compared with the conventional cooking fermentation.

• Microbiology and Biotechnology Letters
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• v.15 no.6
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• pp.408-413
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• 1987

Microorganisms capable of degrading the raw naked barley were isolated from soil, and the amylase productivity of each strain was examined on plate contained 2％ raw naked barley. Of the fungi and actinomycetes tested, 71 strains were subjected to subsequent testing for amylase production, and 4 strains were selected as potent amylase producers. Among them, Strain No. 281 produced the most potent raw naked barley saccharifying enzyme, and was identified as genus Rhizopus from morphological and physiological studies. The ratio of raw starch saccharifying activity (RDA) of the crude enzyme derived from the Rhizopus sp. No. 281 was showed 2-3 fold higher than that of commercial enzyme when the raw naked barley was used as the substrate. In the case of uncooked alcohol fermentation using Rhizopus sp. No. 281 glucoamylase preparation, the alcohol yield of the broth was 2％ higher than that of the commercial enzyme.

• Korean Journal of Food Science and Technology
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• v.21 no.5
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• pp.601-605
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• 1989

Water absorption of the major kernels(7 and 10mesh sizes) of naked barley differing in pearling degrees at $25-50^{\circ}C$ was investigated. The time to reach equilibrium moisture content was reduced by half upon removal of over 20% of the outer layer of the kernel. Water absorption rate and diffusion coefficient of naked barley of 5% pearling degree at $40^{\circ}C$ were faster about 1.5 and 2.8 times than those of unpearled one. The activation energy of hydration for unpearled naked barley was 11.5kcal/mole, which was decreased by approximately 0.4kcal/mole upon increasing the pearling degree by 5%.

• Journal of Plant Biotechnology
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• v.29 no.4
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• pp.217-222
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• 2002

Barley varieties collected from 1940 to 1951 allover the Korean peninsula by Dr. Takahashi Ryuhei were reintroduced from the Research Institute for Bioresouces in Okayama University, Japan, and the evaluation of morphological characteristics and RAPD analysis were performed. Totally, 493 varieties of Korean barley landraces were planted in the green house, from which seeds of 491 varieties were harvested and conserved in the seedbank of the Rural Development Administration. Majority of the naked barley varieties showed dense spikes with long awn, late heading, winter habits, and long plant height. However, variants having various phenotypes such as short awn, blue aleurone color, brachytic type and waxyness were also identified. Plant height, spike length, and cold-tolerance in the varieties were also highly variable among them. Homogeneity tests on the variation of growth habits, spike density, anthocyanin pigmentation on the seed coat, and hairiness on leaf sheath between naked and covered barley showed that the variations of naked barley were similar to those of covered barley. It maybe indicate that the most of naked barley landraces were mutated from the covered barley landraces. Korean landraces of naked barley were broadly divided into 4 groups by the dendrogram produced by morphological characteristics; however, the identities of the group were rather indistinct. Many varieties, belonged to the same group, were showed different band patterns in RAPD analysis using 5 different primer sets. These results indicate that the 112 varieties of naked barley landraces were different genotypes.

• Korean Journal of Food Science and Technology
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• v.4 no.2
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• pp.77-83
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• 1972

In order to study the processing adaptability of naked barley, SEDOHADAKA variety produced in Cheolanam-do(1971) was milled after polishing and examined with respect to its proximate principles, amino acid composition, viscosity, raising power, and amylose content, alkali number, blue value and X-ray diffraction pattern of its starch. The results are summarized as fllows: 1) Crude fiber content of naked barley which was milled at 81.6% (A), 79.2% (B) and 74.1% (C) was $2.48{\sim}2.36%$, indicating higher level than wheat flour. 2) Whereas the initial gelatinization temperature of naked barley flour was similar to that of wheat flour, the value of naked barley starch was $89.5^{\circ}C$, higher than that of wheat starch, Amylose content of naked barley starch was 28.5%, similar to wheat starch. 3) Raising power of naked barley starch was generally lower than that common cereal starches. 4) According to the X-ray diffraction pattern diagram, the degree of crystallization was lower in naked barley starch than in non-glutinous rice starch.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.31 no.2
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• pp.162-166
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• 1986

Experiments were carried out to find the varietal differences in histological structure and outer characteristics, and its relationships between each characters in the internodes of 15 barley varieties (5 covered barley, 5 naked barley and 5 malting barley). The length of 1st-3th internodes from the top was longer in malting barley varieties, covered barley varieties and naked barley varieties in the order, but of 4th-5th internodes was longer in naked barley varieties, covered barley varieties, and malting barley varieties in the order. The diameter of naked barley varieties internodes was much thicker that of malting barley varieties. The thickness of culm wall in 1st-3rd internodes was thicker naked barley varieties, covered barley varieties, and malting barley varieties in sequence and in 4th-5th inter-nodes was covered barley varieties, malting barley varieties, and naked barley varieties in the order. The number of large vascular bundles in covered barley varieties had more than that of naked barley varieties and malting barley varieties in 1st internodes. The size of large vascular bundles in covered barley varieties and naked barley varieties was larger than that of malting barley varieties. The size of large vascular bundles had significant positive correlation with thickness of culm wall and the diameter of internodes. The thickness of culm wall was negatively correlated with the length of internodes and culm, but positively correlated with the diameter of internodes.