• Asian-Australasian Journal of Animal Sciences
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• 제21권6호
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• pp.807-817
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• 2008

Steers with ad libitum access to rice straw were assigned to four diets to evaluate the effects of maize or soybean hull supplementation on intake, in vivo digestibility, ruminal pH, VFA, ammonia-nitrogen ($NH_3-N$) and in situ ruminal disappearance of feed nutrients by cattle consuming rice straw. Supplement treatments were: no supplement (RS); soybean meal at 0.127% BW (SBM); cracked maize at 0.415% BW plus 0.044% BW soybean meal (MAIZE); or soybean hulls at 0.415% BW plus 0.044% BW soybean meal (HULLS). The MAIZE and HULLS diets were formulated to provide approximately 4 MJ of $NE_m$ per kg of diet. Rice straw DMI was not affected (p = 0.34) by supplement. Apparent dry matter (DM) digestibility was greater (p<0.001) for MAIZE and HULLS (56.6 and 60.0%, respectively) than for steers consuming SBM or RS (51.8 and 44.4%, respectively). Apparent NDF digestibility was greater (p<0.0004) for HULLS than MAIZE (61.7 vs. 58.0%, respectively) and apparent ADF digestibility was greater (p<0.0008) for HULLS than MAIZE (61.1 vs. 49.2%, respectively). There was no difference in apparent hemicellulose digestibility (p = 0.43). Analysis of ruminal fluid collected 0, 2, 4, 6, and 8 h post-feeding revealed ammonia-nitrogen was greatest (p<0.05) for steers on SBM and HULLS diets at 2 h (24.08 and 22.57 mg/dl, respectively) and total volatile fatty acids was greatest (p<0.05) for HULLS at 4 h (230 mM/L). In situ disappearance, measured at 0, 2, 4, 6, 8, 16 and 24 h, indicated that SBM, MAIZE and HULLS tended to enhance the digestibility of DM and fiber components of rice straw. In situ disappearance of rice straw DM was greatest for SBM and/or HULLS from 4 to 24 h (p = 0.03). Rice straw NDF and ADF disappearance was enhanced by supplementation from 16 to 24 h (p<0.02). Rice straw DM, NDF and ADF disappearances at 24 h were similar for MAIZE and HULLS treatments. When feeding cattle rice straw diets, energy and protein-based supplements are essential. This study showed that fiber-based supplements are just as, if not more, effective as starch-based supplements in rice straw utilization. This study shows that soybean hulls, in spite of their high fiber content, are as efficient as maize for supplementing rice straw primarily because fiber in soybean hulls is highly digestible as shown by in vivo digestibility and in situ disappearance.

• Asian-Australasian Journal of Animal Sciences
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• 제27권1호
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• pp.24-29
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• 2014

The objective of this study was to assess the effect of substituting corn with soybean hulls on the ingestive behavior and nitrogen balance of Santa Ines lambs. A total of 25 lambs with an initial body weight of $20{\pm}2$ kg at approximately six months of age, sheltered individually in stalls ($1.10m{\times}1.0m$), considering an entirely casual experimental delineation. Soybean hulls were substituted for corn at 0, 250, 500, 750, and 1,000 g/kg of dry matter (DM). The time spent feeding, ruminating, masticating, and resting was not affected by the substitution of corn with soybean hulls. In fact, the feeding efficiency in g DM/h and the rumination efficiency in g DM/bolus increased linearly with soybean hull substitution in the feed. Although the nitrogen balance was not altered by the use of soybean hulls as a substitute for corn in the diets of Santa Ines lambs, the N ingested and N digested expressed in g/d, N retained as a percentage of that ingested, and N retained as a percentage of that digested displayed quadratic behavior. In conclusion, corn can be substituted with soybean hulls up to 1,000 g/kg of dry matter in the concentrate, without changing the ingestive behavior and nitrogen balance.

• Composites Research
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• 제37권3호
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• pp.150-154
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• 2024

본 연구는 대두 부산물인 대두피로부터 나노 섬유화 셀룰로오스를 추출하고, 다른 나노 섬유화 기법으로 제작된 대두피 나노 섬유화 셀룰로오스와 비교 평가를 수행하였다. 건조 대두피를 분쇄하여 마이크로미터 크기의 분말을 제조한 후, NaOH와 HCl을 이용하여 대두피로부터 마이크로 셀룰로오스를 분리하였다. 초음파 분산 및 볼밀링을 통하여 나노미터 크기의 셀룰로오스를 추출하는데 성공하였다. 대두피 나노 섬유화 셀룰로오스는 직경 60-100 nm, 길이 0.3-1.0 ㎛의 크기를 가져 다른 나노 섬유화 기법으로 대두 나노 셀룰로오스와 직경은 유사한 수준이나 길이는 1/5 수준임을 확인하였다.

• Asian-Australasian Journal of Animal Sciences
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• 제26권3호
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• pp.349-357
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• 2013

The aim of this study was to evaluate the efficiency of supplements containing different energy sources in relation to mineral supplementation of steers grazing guineagrass (Panicum maximum cv Tanz$\hat{a}$nia) pasture, during the dry season. The experimental design was a randomized block with three treatments and four replications. The treatments consisted of a mineral supplementation and two other supplements, one based on corn seed and the other based on soybean hulls, and provided at 0.8% of body weight. Forty-eight, 12 month-old crossbred steers with an average initial body weight of 267 kg, were assigned to twelve paddocks (1,125 ha) of guineagrass. The animals that were fed with soybean hulls and corn seed presented a greater average daily gain (0.982 and 0.937) when compared with the mineral supplementation. Soybean hulls can be used as a satisfactory food source, replacing corn as an energy source in the supplementation of beef cattle without compromising animal performance.

• Composites Research
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• 제36권6호
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• pp.448-453
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• 2023

본 논문은 유기농 대두피와 폴리락틱산(PLA)을 혼합하여 지속 가능한 3D 프린팅 필라멘트 개발을 목표로 한다. 이를 위해, 다양한 입자 크기와 혼합 비율, 혼합 조건에 따른 필라멘트를 제작하였으며, 제작된 필라멘트의 물리적 및 기계적 특성을 측정하였다. 결과는 대두피 분말 입자가 작을수록 그리고 특정 혼합 비율이 필라멘트의 품질을 향상시키면서 PLA의 특성을 유지하는 것으로 나타났다. 이 연구는 유기농 대두피를 이용히여 환경 친화적인 3D 프린팅 필라멘트 개발이 가능함을 보여주는 것으로, 상업적 활용을 위한 기초 데이터를 제공한다는 측면에서 의의를 가진다.

• Asian-Australasian Journal of Animal Sciences
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• 제9권2호
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• pp.189-193
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• 1996

A study was conducted to estimate nutritive value of forage sources used in deer diets. Bags containing feedstuffs were incubated four times for periods up to 72 hours in two chemostats filled with ruminal fluid from deer or cattle. Parameters estimated were water-soluble and $65{\mu}m$ filterable plus insoluble digestible fractions(No. = 4) and extent of disappearance(No. = 8) of feed neutral detergent fiber(NDF). Among tested feeds, the ranking of values of these parameters were soybean hulls > alfalfa pellets > corn cobs or rice straw > cottonseed hulls or rice hulls > sawdust, indicating that soybean hulls and alfalfa pellets were more fermentable than other agricultural residues. It is possible to utilize variability among tested feeds of fraction, disappearance rate and (or) extent of DM and NDF when these feeds are used as roughage sources in deer diets.

• Asian-Australasian Journal of Animal Sciences
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• 제18권6호
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• pp.861-867
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• 2005

Feeding values of soybean hulls (SH) were compared to those of wheat bran (WB) for swine diets by chemical compositions, a digestion trial, a preference test by self-selection, and two feeding trials. The SH and the WB appeared to have, on airdry basis, 11.1 vs. 15.4% CP, 32.5 vs. 8.7% crude fiber (CF), 36.8 vs. 10.7% ADF, 0.6 vs. 0.1% Ca, and 492 vs. 92 ppm Fe, respectively. Lysine and total sulfur-containing amino acids in the SH were 0.66 vs. 0.37%, respectively. Apparent digestibility values of the SH were 71% for dry matter, 50% for CP, and 74% for CF. Apparent digestible energy and MEn values of the SH were 2,420 and 2,370 kcal kg$^-1$, respectively, which were comparable to those of the WB, 2,420 and 2,275 kcal kg$^-1$ (NRC, 1998), respectively. The first feeding trial was conducted with 72 crossbred growing pigs with an average weight of 29.6 kg. The pigs when fed the diets containing 0, 6 and 10% SH by replacing the WB on a weight basis for 42 days did not show significant differences in body weight gain and feed/gain ratio among the treatments. The same trends were observed in the second trial with 60 crossbred finishing pigs with an average weight of 64.5 kg when fed the diets containing 12% SH or WB for 41 days. Back-fat thickness and adjusted loin eye muscle area of the finisher pigs were also not significantly different between the two groups. When allowed to self-select from two different feed troughs containing 10% SH or WB for two weeks, two groups of 80 pigs with 10 pigs per pen consumed the two diets exactly in equal proportion. In conclusion, the soybean hulls can be included up to 10 and 12% for growing or finishing pig diets, respectively, replacing the wheat bran on a weight basis without any adverse effects on palatability of diets and animal performances.

• KSBB Journal
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• 제13권5호
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• pp.599-605
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• 1998

Soybean peroxidase was extracted from soybean hulls and purified by ammonium sulfate precipitations (25% and 75% saturation), pl fractionation, and anionic exchange and gel filtration chromatographies (DEAE-Sephadex A-50 and Superose 12). Modlecular weight and pl value were estimated to be ca. 45 kD and 4.2, respectively. Purified soybean peroxidase had an RZ value of 0.43. Compared with horseradish peroxidase, it showed superior thermal and pH stability. Assuming the first-order kinetics, the thermal deactivation rate constant of soybean peroxidase at 80$^{\circ}C$ was about 8 times lower than that of horseradish peroxidase. Deactivation energy was calculated to be 69.3 kcal/mol. Soybean peroxidase showed about 10% higher H2O2 degradation capacity than horseradish peroxidase. Exploiting these advantages, the soybean peroxidase purified from the domestic soybean hull is expected to replace horseradish peroxidase in various applications.

• Journal of Animal Science and Technology
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• 제62권2호
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• pp.180-186
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• 2020

The objective of this study was to determine the effect of replacing corn with soy hulls on nutrient digestibility of growing pigs. Three experimental diets were tested using a 3 × 3 Latin square design using three barrows per group (Landrace × Yorkshire × Duroc, average initial body weight of 36.9 ± 4.0 kg) in individual metabolic cages. The dietary treatments were the control (CON) basal diet (corn-soybean meal based diet), whereas in the test diets, soy hulls were included at 5% (H1), 10% (H2), gradually replacing corn. The daily feed allowance was adjusted to 2.7 times the maintenance requirement for digestible energy (DE) (2.7 × 110 kcal of DE/kg BW^0.75). Intake of crude fiber (CF) was different among treatments (p < 0.05). Pigs fed with H2 diet excreted higher concentrations of dry matter (DM), and CF than pigs fed with H1 diet and basal diet (p < 0.05). Pigs fed with H1 and H2 diets excreted higher concentrations of crude protein (CP) than pigs fed with CON diet (p < 0.05). The apparent total tract digestibility (ATTD) of CF from H1 and H2 diets were higher than CON diet (p < 0.05). Pigs fed with H2 diets were significantly lower (p < 0.05) the ATTD of CP than the pigs fed with CON and H1 diets. The current data suggest that 10% inclusion soy hulls can slightly decrease CP digestibility. However, soy hulls considerably increased CF digestibility.It is concluded that 5% soy hulls may be a usable alternative to corn in growing pig diets.

• Asian-Australasian Journal of Animal Sciences
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• 제16권8호
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• pp.1143-1150
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• 2003

This study was conducted to investigate in vitro methane production of feed ingredients and relationship between the content of crude nutrients and methane production. Feed ingredients (total 26) were grouped as grains (5 ingredients), brans and hulls (8), oil seed meals (9) roughages (3), and animal by-product (1) from their nutrient composition and their methane production protential were measured by in vitro gas test. Among the groups, the in vitro methane productions for both 6 and 24 h incubation were highest in grains, followed by brans and hulls, oil meals and roughages, animal byproducts. Within the group of grains, methane production from wheat flour was the highest, followed by wheat, corn, tapioca, and then oat. Within the brans and hulls, soybean hull showed the highest methane production and cotton seed hull, the lowest. Methane production from oil meals was lower compared with grains and brans and hulls, and in decreasing order production from canola meal was followed by soybean meal, coconut meal, and corn germ meal (p<0.01). Three ingredients were selected and the interactions among feed ingredients were evaluated for methane production. Correlation coefficient between measured and estimated values of the combinations were 0.91. Methane production from each feed ingredient was decreased with increasing amount of crude fiber (CF), protein (CP) and ether extract (EE), whereas positive relationship was noted with the concentrations of N-free extract (NFE). The multiple regression equation (n=134) for methane production and nutrient concentrations was as follows. Methane production (ml/0.2 g DM)=(0.032${\times}$CP)-(0.057${\times}$EE)-(0.012${\times}$CF)+(0.124${\times}$NFE) (p<0.01; $R^2$=0.929). Positive relationship was noted for CP and NFE and negative relationship for CF and EE. It seems possible to predict methane production potential from nutritional composition of the ingredients for their effective application on formulating less methane emitting rations.