• 한국지역사회생활과학회지
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• 제12권1호
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• pp.23-27
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• 2001

This study is designed to find out the physicochemical quality and the morphological features of Korean wheat flour and imported wheat flour with a view to shed light on their difference. In terms of components, Korean wheat flour and imported wheat flour are similar, but the latter turns out to be better than the former when it comes to crude protein, the ratio of water absorption and the power of maintenance. Yet Korean wheat flour turns out to be better than imported wheat flour. In terms of the chromaticity of wheat flour, the latter turns out to be higher than the former when it comes to L value, while the former turns out to be higher than the latter when it comes to a value and b value. In terms of the morphological features of wheat flour, both are in the shape of an oval with starch particles irregularly attached to gluten. And imported wheat flour is getter than Korean wheat flour in terms of the size of particles.

• 한국식품영양학회지
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• 제27권2호
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• pp.287-293
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• 2014

The physicochemical characteristics of 4 domestic wheat flour products were compared to those of 4 imported wheat flour products marketed in Korea. The contents of moisture, ash, protein, total dietary fiber (TDF), color (L, a, b), whiteness, solvent retention capacity (SRC), water absorption index (WAI), water soluble index (WSI), pasting characteristics by rapid visco analyzer (RVA), and principle component analysis (PCA) were analyzed. The domestic wheat flour products were composed of higher content in ash and protein, compared to the imported wheat flour products. The domestic wheat flour products had lower SRC and WSI characteristics than the imported wheat flour products. The values of lactic acid SRC (LASRC) in the imported wheat flour products showed an increasing trend as the protein content increased. The differences in viscosity were observed in the domestic wheat flour products. However, no major significant differences of viscosity were found among the imported wheat flour products. The result of PCA showed a consistent trend in the imported wheat flour (strong, medium, and weak), while a consistent trend was not shown in the domestic wheat flour products. Therefore, further research is needed to standardize the different types of domestic wheat flour products.

• 한국식품저장유통학회지
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• 제31권4호
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• pp.527-540
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• 2024

Whole wheat flour is produced by grinding wheat grains and blending each milling fraction such as wheat bran and white flour with no specific standard for the proportions. An exploration on classifying and utilizing Korean whole wheat flour is required to increase the practical use of many different types of Korean wheat flour products. This study aimed to examine factors for categorization and processability of Korean whole wheat flour by investigating quality characteristics and bread-making properties of Korean hard wheat flour samples produced with different levels of wheat bran (0% as control, 5%, 10%, 15%, 20%, and whole grain wheat flour). The ash content of flour samples was divided into six gradational categories, which could be suggested as classification criteria for Korean whole wheat flour. The main parameters of dough and gelatinization properties of the flour samples exhibited downtrends, but nutritional constituents demonstrated uptrends with increasing bran addition level. The bread specific volume, hardness, chewiness, and brittleness of bread had strong correlations with dough stability and pasting parameters, which could be presented as significant factors for predicting bread-making properties of Korean whole wheat flour.

• 한국식품영양과학회지
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• 제25권5호
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• pp.817-823
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• 1996

전립분의 입도를 달리하여 거친전립분, 고운전립분을 각각 첨가했을 경우 첨가량에 따른 반죽의 물리적 성질을 조사하였다. Farinograph는 전립분 첨가량이 증가함에 따라 흡수량은 거친전립분에서 감소하는 반면 고운전립분은 증가하였다. 반죽도달시간 및 반죽형성시간은 거친전립분의 경우 고운전립분 보다 길어졌다. 약화도는 전립분 첨가량이 증가할수록 약화도가 커졌다. Extensograph는 전립분 첨가량이 증가할수록 신장도 및 신장저 항도가 감소하였으며, 거친전립분에서 신장저항도가 고운전립분 보다 전반적으로 높은 수치를 보였다. Amylograph는 전립 분 첨가량이 증가할수록 최고 점도가 감소하였다. 백도는 전립분 침가량의 증가에 따라 낮았으며, 동일량의 첨가구에서는 거친전림분이 고운전립분 보다 백도값이 다소 높아 약간 밝은 색을 띠었다.

• 한국식품영양과학회지
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• 제23권1호
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• pp.110-115
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• 1994

To investigate the effect of potato lipoxygenase on the farinograph characteristics of wheat flour dough, composite flours containing enzyme-active potato flor (EPF) and hot-ar dried potato flour(HPF) were used. EPF was made by freeze-drying potato tuber. DPF (denaturated potato flour) was prepared by holding EPF at 8$0^{\circ}C$ for 18 hr in a dry oven. The potato flours were added to wheat flour at a level of 10% , respectivley. EPFB (enzyme-active potato flour blends, 90% wheat flour +105 enzyme -active potato flour) containing lipoxygenase activity gave higher farinogram peak time and higher stability values, lower MTI (mixing tolerance index ) and lower weakness values than those of HPFB(hot-air potato flour blends, 90% wheat flour + 10 % hot-air potato flour). Moreover, then lipoxygenase was added to DPFB(denatured potato flour blends , 90% wheat flour + 10% denatured potato flour) at a level of EPFB, it resulted in increasing stability, peak time and decreasing MTI , weakness at a level of EPFB. When the lipoxugenase was added to wheat flour with fumaric acid at alevel of 6.5 $\times$ 10units/g flour, lipoxygenase overcame the deleterious effects that fumaric acid including activated double-bond compounds have at mixing stability. Also the addition of liposxygenase with linoleic acid to defatted wheat flour resulted in the increase in stability and decrease in MTI value compared with those of linoleic acid and defatted wheat flour.

• Preventive Nutrition and Food Science
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• 제17권3호
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• pp.197-202
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• 2012

Normal (cv. Keumkang, KK) and waxy-type (cv. Shinmichal, SMC) whole wheat flour was substituted at 20 and 40% for white wheat flour (WF) during bread dough formulation. The flour blends were subjected to dough and baking property measurement in terms of particle size distribution, dough mixing, bread loaf volume and crumb firmness. The particle size of white wheat flour was the finest, with increasing coarseness as the level of whole wheat flour increased. Substitution of whole wheat flour decreased pasting viscosity, showing all RVA parameters were the lowest in SMC40 composite flour. Water absorption was slightly higher with 40% whole wheat flour regardless of whether the wheat was normal or waxy. An increased mixing time was observed when higher levels of KK flour were substituted, but the opposite reaction occurred when SMC flour was substituted at the same levels. Bread loaf volume was lower in breads containing a whole wheat flour substitution compared to bread containing only white wheat flour. No significant difference in bread loaf volume was observed between normal and waxy whole flour, but the bread crumb firmness was significantly lower in breads containing waxy flour. The results of these studies indicate that up to 40% whole wheat flour substitution could be considered a practical option with respect to functional qualities. Also, replacing waxy whole flour has a positive effect on bread formulation over normal whole wheat flour in terms of improving softness and glutinous texture.

• 한국식품영양과학회지
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• 제25권5호
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• pp.779-785
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• 1996

전립분 입도를 달리하여 거친전립분, 고운전립분을 각각 첨가했을 경우 첨가량에 따른 제빵과정 중 phytic acid 함량 변화와 전립분 첨가빵의 품질을 조사하였다. 회분 함량은 밀가루가 0.413%, 전립분이 1.569%로 전립분이 밀가루 보다 무기성분이 현저히 많았으며, 섬유소도 같은 경향이었다. Amino acid 중에서 glutamic acid 의 함량이 밀가루 및 전립분에서 32~36g/100g protein으로 다른 amino acid 함량 보다 많았다. Lysine, glycine, arginine, aspartic acid는 전립 분에 많았으며, proline, glutamic acid, phenylalanine은 밀가루에 많았다. Phytic acid 함량은 밀가루에서 0.312%, 전립분에서 0.734% 로 나타났다. 제빵 과정 중 phytic acid 함량은 yeast 첨가량 3%첨가구 보다 5% 첨가구에서 더 크게 감소하였다. Phytic acid 함량은 yeast food 무첨가, 0.1, 0.3 및 0.5% 첨가 중 0.1% 첨가구에서 감소되는 효과가 가장 컸다. 전립분 첨가빵 품질에 있어서 거친전립분 30%, 고운전립분 50% 첨가까지는 빵의 부피에 현저한 감소는 없었다. 전립분 첨가량이 증가함에 따라 빵의 부피는 감소하고 색택이 검어졌으며, 관능검사는 거친 전립분 20% 첨가, 고운전립분 30% 첨가한 것이 선호도가 높았다.

• 한국식품영양학회지
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• 제19권4호
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• pp.381-391
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• 2006

The rheological properties of dough made the substitution of wheat flour(composite flour) at the levels of 0%, 5%, 10% and 15% soymilk residue flour, with addition of vital wheat gluten at the levels of 3, 6 and 9% were investigated. And nutrition contents of soymilk residue flour were analyzed. The results were as follows; Principal components of soymilk residue flour were 22.0% crude protein, 13.2% crude lipid, 54.3% carbohydrate, 27.2% dietary fiber and $220{\mu}g/g$ isoflavones. Free amino acid component of soymilk residue were L-glutamic acid, L-leucine, L-lysine, L-valine, L-phenylalanine, L-isoleucine, L-threonine, L-methionine and L-cystine. Total dietary fiber content of bread with soymilk residue and wheat flour were 5% soymilk residue; 3.50%, 10% soymilk residues; 4.65%, 15% soymilk residues; 5.96%, and wheat flour bread: 2.1% respectively Mixing water absorption capacity was increased by increasing amounts of added soymilk residue and vital wheat gluten. Dough development time was increased by increasing amounts of added soymilk residues, while decreased by increasing amounts of vital wheat gluten. The dough volume of composite flour with 5%, 10% and 15% soymilk residue flour were the smaller than wheat flour dough. But the dough volume was increased by added vital wheat gluten, and the composite flour with 5% soymilk residue flour and 9% vital wheat gluten was better than the others. This study proved that the dough volume of composite flour with 5% soymilk residue flour and 9% vital wheat gluten was better than the others. On the other hand, the soymilk residue flour contains dietary fiber, isoflavone, protein, lipid and carbohydrate. Therefore the soymilk residue flour will be very useful as food material.

• 한국지역사회생활과학회지
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• 제12권1호
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• pp.69-85
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• 2001

The purpose of this study was to replace the highly imported wheat consumption with rice in order to improve the rate of food self-sufficiency. Also, the study focused on the possibility of compounded bread making with rice flour, its taste for the Korean who have westernized eating styles, and the development of rice flour compounded bread as an alternative for wheat allergic people. Therefore, the researcher produced the soaked-rice flour, toasted-rice flour, and Extrusion-Expansion of Rice (E-ER) flour by different processing methods to bake rice wheat bread with the 10～50% mixing proportion. The volume and structure of bread were observed with Scanning Electron Microscope (SEM), and the sensory quality and the baking property were analyzed with a seven-point Likert type scale of Quantitative Descriptive Analysis (QDA). The sensory quality consisted of seven qualities such as color, size and distribution of air cell, flavor, softness, chewing, and overall quality that were evaluated as higher rating showed the better quality. The results of this study are: 1. The volume of the three types of rice wheat bread was almost same or bigger than wheat bread with the 20% of mixed proportion. 2. The size and distribution of air cell of E-ER wheat bread observed by SEM were more evenly distributed that toasted-rice wheat bread. The E-ER wheat bread had soft structure and was relatively similar to wheat flour bread. However, the structure of soaked-rice wheat bread was significantly different to other types of rice wheat bread. The structure of 10% mixed all three types of rice wheat bread was similar and evenly distributed to wheat bread but was bigger and coarser as higher mixing proportion of rice flour. 3. The dark brown color of rice wheat bread showed low sensory quality. 4. Both soaking-rice flour and E-ER flour were able to be mixed with wheat flour up to the 50%, and the seven sensory quality of these wheat bread were better than those of wheat bread. Among the three types of rice flour, toasted-rice wheat bread showed low bread property and sensory quality compared to soaked-rice or E-ER wheat bread. Consequently, this study showed that rice wheat bread that contains 20～30% of rice flour was better than wheat bread in the appropriate volume, seven sensory qualities and bread property.

• 한국농촌생활과학회지
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• 제6권2호
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• pp.91-97
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• 1995

The sensory quality and the baking property of blonds containing 10-50% of rice flour with wheat flour were analysed by QDA. As sensory characteristics, color, air cell size, air cell distribution, flavor, softness, chewiness and overall quality were evaluated. Bread could be made successfully even using up to 50% rice flour. The color, flavor, softness and chewiness were increased in rice-wheat bread especially using 10∼30% of rice flour, but in case of using 40∼50% of rice flour those characteristics were not significantly different from those of wheat bread. The size of air cell in 10∼30% rice-wheat bread was not significantly different but in 40∼50% rice-wheat bread it was increased. The distribution of air cell was more even in 10∼30% rice-wheat bread than in wheat bread, but not in 40∼50% rice-wheat bread. The overall quality of rice-wheat bread was shown to be better in 10∼30% rice-wheat bread than in wheat bread.