• Korean Journal of Breeding Science
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• v.43 no.4
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• pp.318-321
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• 2011

Rice ageing describes the changes in physical and chemical properties of rice grains during storage that alter the eating quality of rice. The prevention of deterioration in palatability of rice during storage is important for stable supply. In this study, We conducted to select the variety with superior palatability after storage at room temperature. 'Yeonghojinmi' had much higher head rice ratio of milled rice than that of 'Ilmi', 'Junam'and 'Hwayeong'at similar moisture content of approximately 15%. Grossiness and stickiness were higher in 'Yeonghojinmi' than that of the others. Meanwhile, yellowness(b value) of cooked rice was lower in 'Yeonghojinmi' than that of the others. Of the four varieties, Yeonghojinmi was maintained good eating quality after storage in room temperature, which also contributed to differences in palatability, such as protein content, glossiness, stickiness and color of cooked rice.

• Food Science of Animal Resources
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• v.41 no.2
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• pp.214-223
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• 2021

This study compared the quality, cooking, textural, and palatability characteristics between sous-vide (SV) cooked pork loin patties with different searing treatments (ST). Before SV cooking, STs were conducted on each side of the pork loin patties for 0 (control) to 120 s (ST120), and all patties were then cooked using an SV cooker at 75℃ for 120 min. Noticeable differences were observed in quality properties between the groups. The seared SV loin patties exhibited lower lightness and higher browning index values compared to the unseared SV loin patties (p<0.001). Cooking loss gradually increased with increasing ST times, and the control group had a lower percentage compared to the ST60 group (19.5 vs. 25.7%, p<0.001). Changes in cooking properties were associated with the extent of ST, and the ST groups exhibited a higher hardness value compared to the control group (p<0.001). Regarding palatability, loin patties from the control group scored lower in appearance acceptability compared to patties from the ST groups (p<0.05) due to extent of browning on the surface. Moreover, the ST groups did exhibit a higher flavor intensity compared to the control group, but no differences were observed in tenderness and juiciness scores between the control and ST60 groups. Due to these results, the ST60 group exhibited a greater score in overall acceptability compared to the other groups except for the ST90 group. Therefore, an additional ST before SV cooking can achieve a more appealing appearance and palatability as well as to enhance the availability of pork loin.

• Proceedings of the Korean Society of Crop Science Conference
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• 2022.10a
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• pp.286-286
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• 2022

The properties of starch play an important role in determining the palatability of rice. In addition, the gelatinization temperature (GT) of rice starch is an important factor in determining the quality of rice because it is related to the cooking time and texture of rice. For the development of high-quality rice, it is important to understand the genetic basis of palatability-related traits, and QTL analysis is an effective method to explain the genetic basis of variation in complex traits. QTL mapping related to alkali digestion value (ADV) of brown and milled rice was performed using the 120 Cheongcheong/Nagdong double haploid (CNDH) line. As a result, 12 QTLs related to ADV were detected, and 20 candidate genes were selected from the RM588-RM1163 region of chromosome 6 through screening by gene function analysis. The comparison of the relative expression level of candidate genes showed that OsSS1q6 is highly expressed in CNDH lines with high ADV in both brown rice and milled rice. In addition, OsSS1q6 has high homology with starch synthase 1 protein, and interact with various starch biosynthesis-related proteins, such as GBSSII, SBE, and APL. Therefore, we suggest that OsSS1q6 identified through QTL mapping could be one of the various genes involved in the GT of rice by regulating starch biosynthesis. This study can be used as basic data for breeding high-quality rice and provides a new genetic resource that can increase the palatability of rice.

• Proceedings of the Korean Society of Crop Science Conference
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• 2004.04a
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• pp.60-61
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• 2004

• The Korean Journal of Food And Nutrition
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• v.11 no.5
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• pp.475-481
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• 1998

This study was conducted to investigate the possibility for low fat press ham which was made without fat added. Four kinds of press ham were prepared ; Apork 70%, fat 0% ; low fat press ham), B(pork 60%, fat 10%), C(pork 55%, fat 15%) and D(pork 50%, fat 20%). The press ham samples were stored at 4$\pm$2$^{\circ}C$. The physic chemical properties of press hams were analyzed during storage 60 days at 4$^{\circ}C$. The contents of moisture(71.3%) and crude protein (23.4%) of low press ham were higher than those of other products, and crude fat content (2.8%) was remarkably lower(p<0.5). The water holding capacity of press ham was higher than other products. Hunter's L(61.6) and b-value(5.9) of low fat press ham were lower than other products, but a-value(11.7) was higher. Hardness (70.2 dyne/cm), springiness(85%), chewiness(0.49kg), gumminess (2.0kg) and brittleness (0.7kg) of low fat press ham were higher than those of other products, but cohesiveness was lower than D product. Aroma and texture of low fat press ham were inferior to other, but taste and palatability of that were superor.

• Journal of the Korean Society of Food Science and Nutrition
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• v.36 no.3
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• pp.355-360
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• 2007

This study was carried out to investigate the effects of adding wine on the quality and palatability of pork patties. Pork patties were prepared by four types: pork patty without wine (control), pork patty containing wine 1% (WP-1), pork patty containing wine 3% (WP-2), and pork patty containing wine 5% (WP-3). Moisture, crude protein, crude fat, crude ash, Hunter's $a^*$ value, calorie, water holding capacity, VBN content, total bacterial counts, amino acid composition, fatty acid composition, flavor, texture, and juiciness were not significantly different among the pork patties. The $L^*\;and\;b^*$ values of the control patty was higher than those of the WP-1, WP-2, and WP-3 (p<0.05). The pH and TBARS value of the WP-2 and WP-3 were lower than those of the control patty and WP-1 (p<0.05). The total amino acid content of the control patty, WP-1, WP-2, and WP-3 were 18.29, 17.83, 17.85, and 17.37%, respectively. Palmitic acid was the most abundant among saturated fatty acids while oleic acid was the most abundant unsaturated fatty acid in the four groups. The taste and palatability of the WP-2 and WP-3 were superior to the control patty and WP-1 (p<0.05).

• KOREAN JOURNAL OF CROP SCIENCE
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• v.62 no.2
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• pp.79-86
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• 2017

This study was conducted to analyze seasonal and annual variations in rice quality and factors affecting the quality, for quality evaluation of the brand rice varieties produced in Jeonnam region. Coefficient of variation (CV) values for the seasonal variation in the rice quality were 3.1% in Toyo value, 2.1% in whiteness, 1.6% in protein content, 1.0% in moisture content, and 0.4% in head rice ratio. Quality characteristics of the brand rice varieties generally showed a decreasing tendency after April, as the months progressed. CV values for the annual variation in the rice quality were relatively high at 5.6% in protein content and 5.2% in Toyo value whereas those for whiteness and head rice ratio were relatively low, at 2.7% and 1.8%, respectively. Palatability and protein content showed high correlations with minimum air temperature, sunshine hours, rainfall, and daily temperature range. Head rice ratio had a negative correlation with daily temperature range whereas chalky rice ratio had a positive correlation with rainfall. Based on these results, we formulated a multiple regression equation to estimate palatability of cooked rice using protein content, whiteness, head rice ratio, and moisture content as follows: y = - 6.71a + 2.27b + 1.29c + 0.51d - 15.34 ($R^2$=0.51*) (y: palatability of cooked rice, a: protein content, b: moisture content, c: whiteness, d: head rice ratio).

• Korean Journal of Food Science and Technology
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• v.18 no.1
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• pp.16-23
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• 1986

Physico-chemical and sensory characteristics of 28 black tea samples prepared by oaring the mixing ratio of 1 kind of Korean and 9 kinds of foreign black tea were determined, and their relationship was statistically analysed. Korean black tea was found to be lower in bulk density, caffeine, theobromine, crude protein, theaflavin, thearubigin and soluble solids, and higher in Hunter L- and b- value, neutral detergent fiber, calcium and ratio of oxidized matter as compared with foreign black tea. The palatability for 8 kinds of foreign black tea was generally increased by mixing with Korean black tea. The number of black tea whose palatability were higher than that of Korean black tea was 12, which was mostly mixed black tea. Theaflavin. Hunter a-value, soluble solids of the tea infusion, and potassium of the manufactured tea were the major guiding characteristics as a result of stepwise multiple regression analysis, and about 67% of the total variations in the palatability of black tea could be explained by the regression equation formulated by the preceding 4 characteristics.

• Korean Journal of Fisheries and Aquatic Sciences
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• v.56 no.2
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• pp.204-211
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• 2023

This study investigated the physicochemical properties and palatability-enhancing effects of the alcohol precipitate, in the enzymatic extracts of Sargassum confusum C. Agardh (SC), obsained using the crude enzyme of Shewanella oneidensis PKA 1008. We analyzed the oligosaccharides recovered from the alcohol precipitate using a thin-layer chromatography for SC-degrading extracts, pH, color, reducing sugar, and viscosity. Thin-layer chromatography showed that after treating with the crude enzyme for 60 h, the polysaccharides were degraded into tetramers, dimers, and trimers and pH increased in the alcohol precipitate (EtOH Sedi). In terms of color, the redness and yellowness of alcohol precipitate/supernatant (EtOH Sedi+Super) and the brightness of EtOH Sedi were the highest among enzyme treated for 0 h and 60 h, EtOH Sedi, and EtOH Sedi+Super. In the reducing sugar analysis, EtOH Sedi showed the lowest value of 13.63 ㎍/mL, and the lowest viscosity of 1.13. In terms of the sensory evaluation, EtOH Sedi+Super showed the highest value with respect to the overall preference. These results suggest that the crude enzyme of S. oneidensis PKA 1008 is effective at degrading polysaccharides, and its recovery increases the palatability of the alcohol precipitate.

• Journal of the Korean Society of Food Science and Nutrition
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• v.25 no.4
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• pp.637-642
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• 1996

This study was carried out to investigate the change of palatability improvement of cooked meat by the physico-chemical properties and sensory characteristics as aging at $3^{\circ}C$ after thawing of frozen Holstein tenderloin. Shear force value(SFV), myofibrillar fragmentation ratio(MFR), appearance of 30ki1o dalton (30KD) component, raw meat aroma, tenderness, palatability of cooked meat, content of free amino acid and ATP related compound were measured. Raw meat aroma (p< 0.01), tenderness(p<0.05), SFV(p<0.05), MFR(p<0.01) and 30KD(p<0.001) of unfrozen beef tenderloin aged at $3^{\circ}C$ were superior than frozen beef tenderloin. As aging at $3^{\circ}C$ after thawing of frozen beef tenderloin SFV(p<0.05) decreased, MFR(P<0.001) and 30KD(p<0.001) increased, and raw meat aroma and tenderness improved(p<0.05). Also, cooked meat aroma, texture and palatability improved(p<0.05), without changing the taste. The content of aspartic acid and leucine of tenderloin aged thawing of frozen beef abounded were more than frozen beef(p<0.05), concentration of IMP(P<0.05) decreased, the hypoxanthine(p<0.05) and inosine increased.