• Title/Summary/Keyword: kernel characteristics

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THE EFFECTS OF BENTONITE ON RUMEN PROTOZOAL POPULATION AND RUMEN FLUID CHARACTERISTICS OF SHEEP FED PALM KERNEL CAKE

  • Abdullah, N.;Hanita, H.;Ho, Y.W.;Kudo, H.;Jalaludin, S.;Ivan, M.
    • Asian-Australasian Journal of Animal Sciences
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    • v.8 no.3
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    • pp.249-254
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    • 1995
  • The effects of bentonite (B) on rumen protozoal population and rumen fluid characteristics of sheep fed palm kernel cake (PKC) were studied for a period of 21 days. Two groups, each comprising two sheep were fed either PKC or PKC + B ad libitum A third group was left at pasture. Rumen fluid was sampled through a rumen cannula three times daily from all animals. Palm kernel cake contained 16% crude protein, 1 % crude fat and high amounts of copper, zinc, iron and manganese. Protozoal population in the rumen fluid decreased significantly (p < 0.05) after the onset of feeding PKC or PKC + B. However, sheep given bentonite supplementation at 2% of the dietary dry matter, maintained higher protozoal densities ($15{\times}10^4/ml$) when compared to animals fed only PKC ($8{\times}10^4/ml$). With both diets, the protozoa were mainly of the small entodinia species. Animals at pasture had higher protozoal population ($47{\times}10^4/ml$) with varying species of entodiniomorphids and holotrichs. Rumen fluid pH and ammonia concentration was significantly (p < 0.05) higher in animals at pasture compared to animals fed PKC or PKC + B. Volatile fatty acid concentration was significantly (p < 0.05) lower in animals fed PKC when compared to animals at pasture. There was a shift in fermentation pattern in animals fed PKC or PKC + B towards a lower acetate; and higher propionate, isovalerate and valerate. Studies in vitro also showed the positive effect of bentonite on protozoal numbers.

Gaussian Kernel Smoothing of Explicit Transient Responses for Drop-Impact Analysis (낙하 충격 해석을 위한 명시법 과도응답의 가우스커널 평활화 기법)

  • Park, Moon-Shik;Kang, Bong-Soo
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.35 no.3
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    • pp.289-297
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    • 2011
  • The explicit finite element method is an essential tool for solving large problems with severe nonlinear characteristics, but its results can be difficult to interpret. In particular, it can be impossible to evaluate its acceleration responses because of severe discontinuity, extreme noise or aliasing. We suggest a new post-processing method for transient responses and their response spectra. We propose smoothing methods using a Gaussian kernel without in depth knowledge of the complex frequency characteristics; such methods are successfully used in the filtering of digital signals. This smoothing can be done by measuring the velocity results and monitoring the response spectra. Gaussian kernel smoothing gives a better smoothness and representation of the peak values than other approaches do. The floor response spectra can be derived using smoothed accelerations for the design.

Growth Characteristics and Grain Quality of Naked Barley Infected by Barley Yellow Mosaic Virus (보리호위위병(BaYMV)이병에 따른 쌀보리 품종의 생육특성 및 품질)

  • 이중호;김양길;서재환;박종철;최재성;김수동
    • KOREAN JOURNAL OF CROP SCIENCE
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    • v.48 no.6
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    • pp.501-505
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    • 2003
  • The growth characteristics and damage of naked barley infected with barley yellow mosaic virus (BaYMV) were investigated between resistant and susceptible varieties in habitual field plot of BaYMV BaYMV of the barley plants with typical disease symptom were identified by enzyme linked immunosorbent assay (ELISA) test. The visual degree (0-9) based on disease symptoms of BaYMV was different as 9 and 1 between susceptible variety Baegdong and resistant variety Naehanssalbori, respectively. Susceptible variety, Baegdong showed significant damage in culm length, number of kernel per spike and tiller per square meter but not in 1,000 kernel weight, so these results caused yield reduction to only 80% comparing to the control. Seed germination did not affected by BaYMV infection both in susceptible and resistant variety. In grain quality test, abortive grain yale and crude protein content were significantly increased compared to the control. The relationships between BaYMV infection and growth characteristics showed the negative correlations in culm length, number of tiller, 1000 kernel weight and yield, but it showed the positive correlation in crude protein contents. These results implied that BaYMV can affect not only barley growth and yield but grain quality.

Effects of dietary palm kernel meal and β-xylanase on productive performance, fatty liver incidence, and excreta characteristics in laying hens

  • Choi, Won Jun;Kim, Jong Hyuk;Kim, Hyun Woo;Kim, Kwan Eung;Kil, Dong Yong
    • Journal of Animal Science and Technology
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    • v.63 no.6
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    • pp.1275-1285
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    • 2021
  • The objective of the present experiment was to investigate the effect of dietary palm kernel meal (PKM) and β-xylanase supplementation on productive performance, egg quality, fatty liver incidence, and excreta characteristics in laying hens. A total of 320 Hy-Line Brown laying hens (33 weeks of age) were allotted to 1 of 4 treatments with 8 replicates in a feeding trial. Each replicate consisted of 10 consecutive cages with 1 hen per cage. The corn-soybean meal-based control diet was prepared. Additional diet was prepared by including 10% of PKM in the control diet with a partial replacement of corn, soybean meal, and animal fat. In addition, 0.025% β-xylanase was supplemented at the expense of celite to those 2 diets to produce 4 treatment diets in a 2 × 2 factorial arrangement. All hens were provided the diet and water ad libitum for 8 weeks. Results indicated no significant interactions between inclusion of dietary PKM and β-xylanase for all measurements; therefore, the main effects were mainly discussed. Hens fed diets containing 10% PKM had greater (p < 0.05) feed intake and yolk color than those fed diets containing no PKM. However, dietary PKM did not influence fatty liver incidence and excreta characteristics. Dietary β-xylanase supplementation had no effects on all measurements, regardless of inclusion of PKM. In conclusion, PKM can be a potential feed ingredient for laying hens at the inclusion of 10% in the diet. It appears that dietary β-xylanase used in the current experiment has little effect on layer productivity, regardless of inclusion of 10% PKM in the diet.

Research Status and Prospects in Rice Quality (쌀 품질의 연구현황, 문제점 및 방향)

  • Kim, Kwang-Ho;Chae, Je-Cheon;Lim, Moo-Sang;Cho, Soo-Yeon;Park, Rae-Kyeong
    • KOREAN JOURNAL OF CROP SCIENCE
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    • v.33 no.s01
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    • pp.1-17
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    • 1988
  • Rice Quality is considered to the five catagories ; the nutritional value: the characteristics of cooking. eating and processing: grain size, shape and appearance : milling yields: and storage characteristics. Because most rice is processed and consumed in whole-kernel form. the cooking and eating quality is of important and the physical properties of the intact kernel such as size, shape and general appearance are of particular significance in determining marketing quality. Eating Quality which can be directly evaluated by consumer's panel test is so complicate and variable, and thus the objective and simplified method of evaluation is required of using appropriate instruments. Even though many researches have been done to evaluate the eating quality in various aspects such as the texture of cooked rice kernels, amylogram analysis of rice powder, amylose content. gelatinization temperature. moisture absorption of rice kernel, and cooking characteristics, none of them is satisfied for the evaluation of eating quality. The improving eating quality should be also considered to many cultural factors. such as varieties, climatic and soil conditions, cultural method, handling after harvest. milling and storage conditions. In Korea, many researches in grain size. shape and appearance, and eating quality have been done with the varietal improvement mainly by rice breeders, but no effective method of evaluation was established. A few research have been done in the relationship between rice quality and cultural factors. In the future, research in rice quality should emphasize to establish the standard evaluation method in the physicochemical properties of rice kernels for application of varietal selection. and to develop cultural practices for the preserving quality characteristics of the varieties.

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Effect of Feeding Rubber Seed Kernel and Palm Kernel Cake in Combination on Nutrient Utilization, Rumen Fermentation Characteristics, and Microbial Populations in Goats Fed on Briachiaria humidicola Hay-based Diets

  • Chanjula, P.;Siriwathananukul, Y.;Lawpetchara, A.
    • Asian-Australasian Journal of Animal Sciences
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    • v.24 no.1
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    • pp.73-81
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    • 2011
  • Six male crossbred (Thai Native${\times}$Anglo Nubian) goats, with an average initial weight of $22{\pm}2\;kg$, were randomly assigned according to a $3{\times}2$ factorial arrangement in a $6{\times}6$ Latin square design with a 21-d period to evaluate the effect of feeding rubber seed kernel (RSK) and palm kernel cake (PKC) in combination on nutrient utilization, rumen fermentation characteristics, and nitrogen utilization. The dietary treatments were as follows: i) concentrate containing 0% RSK and 20% PKC ($T_1$), ii) 0% RSK and 30% PKC ($T_2$), iii) 20% RSK and 20% PKC ($T_3$), iv) 20% RSK and 30% PKC ($T_4$), v) 30% RSK and 20% PKC ($T_5$), and vi) 30% RSK and 30% PKC ($T_6$). During the experiment, signal hay was given on an ad libitum basis as the roughage. It was found that RSK levels and PKC levels had no interaction effects on feed intake, apparent digestibility, $NH_3$-N, blood metabolites, VFA concentrations, and nitrogen utilization, but there were interactions between RSK levels and PKC levels with respect to total DMI (kg/d) and total VFA concentrations, and goats receiving 30% RSK had lower values (p<0.05) than those receiving 0 and 20% RSK, respectively. Feeding different PKC levels did not affect (p>0.05) feed intake, digestibility, rumen fermentation patterns, blood metabolites, and nitrogen utilization. However, increasing RSK levels (>20%) resulted in a slightly lower daily DMI (% BW and g/kg $BW^{0.75}$), apparent digestibility (NDF and ADF), total N intake, and N excretion than in goats fed on 0 and 20% RSK. BUN, blood glucose, and propionate were variable among treatment and were highest in 0% RSK with the 20% PKC fed group having values which were higher than those in other groups. However, there were no differences (p>0.05) among treatments with respect to N retention, PD output, and microbial N supply. Based on this study, RSK levels up to 20% and PKC at 20-30% in concentrate could be efficiently utilized for goats fed on signal hay.

Kernel Characteristics and Germination Rate during . the Grain Filling in Super Sweet Corn (초당옥수수 등숙시기에 따른 종실특성 변화와 발아율)

  • 정태욱;김선림;차선우;김달웅
    • KOREAN JOURNAL OF CROP SCIENCE
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    • v.45 no.3
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    • pp.176-180
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    • 2000
  • The higher sugar and lower starch in super sweet corn may be due to modified endosperm genes sh, bt series, but its seeds have major limiting factors causing low germination and low seedling vigor, This study was conducted to determine what measurable kernel characteristics during the grain tiling period might be more useful as a guide to optimize harvest date for good seed quality in hybrid super sweet corn production. Artificial crossing in super sweet corn hybrid (Chodangok 1) was made on the same day, and ears were harvested from 18 days to 53 days after pollination at weekly intervals. Kernel weight, moisture content, hardness, endosperm rate, seedling height and storage nutrients such as sugars, protein, starch, and germination rate were measured for the kernels at each harvest. Super sweet corn hybrid, Chodangok 1 presented satisfactory germination rate above 70% when harvested on 39 to 46 days after pollination. Its storage nutrients at that time were 23.7-24.2% in starch content 5.5-5.9% in total sugars, 38.9-46.6% in kernel moisture, and 62.7-64.2% in endosperm rate. Germination rate was extremely high when harvested on 39 days after pollination. The black layer of Chodangok 1 could not be used as an indicator for seed harvest. These results suggested that optimum harvest date seems to be 39 days, and kernel moisture and starch content could be used as indications of kernel maturity in deciding when to harvest fer good seed quality in super sweet corn.

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A Study on Optimization of Perovskite Solar Cell Light Absorption Layer Thin Film Based on Machine Learning (머신러닝 기반 페로브스카이트 태양전지 광흡수층 박막 최적화를 위한 연구)

  • Ha, Jae-jun;Lee, Jun-hyuk;Oh, Ju-young;Lee, Dong-geun
    • The Journal of the Korea Contents Association
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    • v.22 no.7
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    • pp.55-62
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    • 2022
  • The perovskite solar cell is an active part of research in renewable energy fields such as solar energy, wind, hydroelectric power, marine energy, bioenergy, and hydrogen energy to replace fossil fuels such as oil, coal, and natural gas, which will gradually disappear as power demand increases due to the increase in use of the Internet of Things and Virtual environments due to the 4th industrial revolution. The perovskite solar cell is a solar cell device using an organic-inorganic hybrid material having a perovskite structure, and has advantages of replacing existing silicon solar cells with high efficiency, low cost solutions, and low temperature processes. In order to optimize the light absorption layer thin film predicted by the existing empirical method, reliability must be verified through device characteristics evaluation. However, since it costs a lot to evaluate the characteristics of the light-absorbing layer thin film device, the number of tests is limited. In order to solve this problem, the development and applicability of a clear and valid model using machine learning or artificial intelligence model as an auxiliary means for optimizing the light absorption layer thin film are considered infinite. In this study, to estimate the light absorption layer thin-film optimization of perovskite solar cells, the regression models of the support vector machine's linear kernel, R.B.F kernel, polynomial kernel, and sigmoid kernel were compared to verify the accuracy difference for each kernel function.

Study on File Recovery Based on Metadata Accoring to Linux Kernel (리눅스 커널에 따른 메타데이터 기반 파일 복원 연구)

  • Shin, Yeonghun;Jo, Woo-yeon;Shon, Taeshik
    • Journal of the Korea Institute of Information Security & Cryptology
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    • v.29 no.1
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    • pp.77-91
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    • 2019
  • Recent Linux operating systems having been increasingly used, ranging from automotive consoles, CCTV, IoT devices, and mobile devices to various versions of the kernel. Because these devices can be used as strong evidence in criminal investigations, there is a risk of destroying evidence through file deletion. Ext filesystem forensics has been studied in depth because it can recovery deleted files without depending on the kind of device. However, studies have been carried out without consideration of characteristics of file system which may vary depending on the kernel. This problem can lead to serious situations, such as those that can impair investigative ability and cause doubt of evidence ability, when an actual investigation attempts to analyze a different version of the kernel. Because investigations can be performed on various distribution and kernel versions of Linux file systems at the actual investigation site, analysis of the metadata changes that occur when files are deleted by Linux distribution and kernel versions is required. Therefore, in this paper, we analyze the difference of metadata according to the Linux kernel as a solution to this and recovery deleted file. After that, the investigating agency needs to consider the metadata change caused by the difference of Linux kernel version when performing Ext filesystem forensics.

Current Regional Cultural Situation and Evaluation of Grain Characteristics of Korean Wheat II. Grain Characteristics Collected in Domestic Wheat Cultivar Grown in Korea (국산밀 품질 향상을 위한 지역별 재배 현황 및 원맥 특성 평가 II. 농가 수집 원맥 특성 평가)

  • Kim, Kyeong-Hoon;Kang, Chon-Sik;Seo, Yong-Won;Woo, Sun-Hee;Heo, Moo-Ryong;Choo, Byung-Kil;Lee, Choon-Kee;Park, Kwang-Geun;Park, Chul Soo
    • KOREAN JOURNAL OF CROP SCIENCE
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    • v.58 no.3
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    • pp.239-252
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    • 2013
  • Agronomic characteristics and grain properties of Korean wheat of 175 farmers in nationwide for two years, 2010/2011 and 2011/2012, were evaluated to support basic data for improving grain quality of Korean wheat and enhancing Korean wheat consumption. Agronomic characteristics, including culm length, spike length, number of $spike/m^2$ and rate of off-type plant, and grain properties, including 1000 kernel weight, test weight, moisture, ash and protein content, were influenced by year and location. Number of $spike/m^2$, test weight, moisture, ash and protein content of wheat cultivated in 2011 were higher than those of 2012 and culm length, spike length, rate of off-type plant and 1000 kernel weight of 2012 were higher than those of 2011. Wheat cultivated in southern part of Korea showed higher culm length and 1000 kernel weight and lower test weight than those of northern part of Korea. Spike length, number of $spike/m^2$ and test weight were reduced by additional fertilization after mid of March, although there was no significant difference between date of additional fertilization and grain properties. Cultivated wheats in Jeollabuk-do showed lower ash content and higher protein content than those of other provinces and cultivated wheats in Jeollanam-do exhibited higher ash content than that of other provinces. As amount of fertilization increased, culm length, 1000 kernel weight and protein content increased and spike length and ash content were decreased, although date of additional fertilization did not effect on agronomic characteristics and grain properties. Amount of fertilization was positively correlated with 1000 kernel weight and protein content (r = 0.159, P < 0.05 and r = 0.212, P < 0.01, respectively) and was negatively correlated with ash content (r = -0.185, P < 0.05). Thousand kernel weight was negatively correlated with ash content (r = -0.226, P < 0.01) and positively correlated with protein content (r = 0.207, P < 0.01). Ash content increased as test weight and culm length decreased and 1000 kernel weight was influenced by culm and spike length (r = 0.397, P < 0.001 and r = -0.205, P < 0.01, respectively).