• Journal of the Korean Society of Food Science and Nutrition
• /
• v.45 no.7
• /
• pp.973-979
• /
• 2016

Lentils (Lens culinaris) have been gaining increasing attention recently as a top five superfood, as they are high in protein and other essential nutrients, including folate, iron, potassium, and various antioxidants. In the present study, phenolic extracts from four different lentil cultivars (green, red, French, and beluga) were evaluated for their total phenolic contents and in vitro antioxidant activities. Total polyphenol and flavonoid contents of four different lentil extracts were 27.30~30.30 mg tannic acid equivalents (TAE)/g and 13.14~16.29 mg quercetin equivalents (QUE)/g, respectively. Beluga and red lentil extracts showed higher polyphenol contents than others (P<0.05), whereas there was no significant difference in flavonoid contents among the four lentil cultivars. $RC_{50}$ values of the lentil extracts for DPPH radical, ABTS radical, and $H_2O_2$ were $57.42{\sim}64.49{\mu}g/mL$, $66.11{\sim}75.69{\mu}g/mL$, and $59.72{\sim}72.86{\mu}g/mL$, respectively. Among the four lentil extracts, beluga lentil extract showed the most potent scavenging effect in all three reactive oxygen species (ROS) scavenging assays, and thus beluga extract was further tested for its inhibitory effect on early peroxidation of linoleic acid. The results showed that beluga lentil extract significantly inhibited linoleic acid peroxidation in a dose-dependent manner (concentration required for 50% reduction=$222.76{\m}g/mL$). In addition, beluga lentil extract showed a significant protective effect against alcohol-induced cytotoxicity in AML-12 cells (normal mouse hepatocyte cell line). Taken together, these results suggest that lentil extracts represent potential sources of natural antioxidants, and further studies will be necessary to determine their protective effects against oxidative stress in vivo.

• Journal of agricultural medicine and community health
• /
• v.27 no.2
• /
• pp.149-157
• /
• 2002

This study was carried out to investigate the nutrients intakes of hypertensive female farmers in Korea. The number of subjects in this survey was 40(normal 22, hypertensive 18). Body weight, height, circumferences of waist, hip and thigh, and systolic and diastolic blood pressure of them were measured, and lipids and mineral levels of venous blood, mineral contents of 24-hour urine and Na or K levels of some sodium sources were analyzed. The evaluation of nutritional status was performed by recording dietary intake for a day and analyzing it with food composition table. Body weight, waist circumference, waist to thigh ratio, and serum triglyceride were higher in hypertensive. The mean values of calcium, vitamin B2 and niacin intakes of the subjects didn't meet the Korean recommended allowances though there was no significant difference in nutrients intake between two groups. The value of sodium intake presumed from content of sodium excreted to urine, and Na content and Na/K in Korean cabbage Kimchi was higher in hypertensive. These results suggest that reducing of serum triglyceride, decreasing of sodium intake and changing the taste for saltiness can help develop the health status of the rural female hypertensive and control the blood pressure of them.

• Proceedings of the Korean Geotechical Society Conference
• /
• 2006.03a
• /
• pp.86-95
• /
• 2006

Brillouin backscatter is a type of reflection that occurs when light is shone into an optical fibre. Brillouin reflections are very sensitive to changes in the fibre arising from external effects, such as temperature, strain and pressure. We report here several case studies on the measurement of strain using Brillouin reflections. A mechanical bending test of an I beam, deployed with both fiber optic sensors and conventional strain gauge rosettes, was performed with the aim of evaluating: (1) the capability and technical limit of the DTSS technology for strain profile sensing; (2) the reliability of strain measurement using fiber optic sensor. The average values of strains obtained from both DTSS and strain gauges (corresponding to the deflection of I beam) showed a linear relationship and an excellent one-to-one match. A practical application of DTSS technology as an early warning system for land sliding or subsidence was examined through a field test at a hillside. Extremely strong, lightweight, rugged, survivable tight-buffered cables, designed for optimal strain transfer to the fibre, were used and clamped on the subsurface at a depth of about 50cm. It was proved that DTSS measurements could detect the exact position and the progress of strain changes induced by land sliding and subsidence. We also carried out the first ever distributed dynamic strain measurement (10Hz) on the Korean Train eXpress(KTX) railway track in Daejeon, Korea. The aim was to analyse the integrity of a section of track that had recently been repaired. The Sensornet DTSS was used to monitor this 85m section of track while a KTX train passed over. In the repaired section the strain increases to levels of 90 microstrain, whereas in the section of regular track the strain is in the region of 30-50 microstrain. The results were excellent since they demonstrate that the DTSS is able to measure small, dynamic changes in strain in rails during normal operating conditions. The current 10km range of the DTSS creates a potential to monitor the integrity of large lengths of track, and especially higher risk sections such as bridges, repaired track and areas at risk of subsidence.

• Journal of the Korea Concrete Institute
• /
• v.28 no.3
• /
• pp.365-373
• /
• 2016

Ultra-High-Performance Steel Fiber-Reinforced Concrete (SUPER Concrete) exhibits improved compressive and tensile strengths far superior to those of conventional concrete. These characteristics can significantly reduce the cross sectional area of the member and the anchorage strength of a headed bar is expected to be improved. In this study, the anchorage strengths of headed bars with $4d_b$ or $6d_b$ embedment length were evaluated by simulated exterior beam-column joint tests where the headed bars were used as beam bars and the joints were cast of 120 or 180 MPa SUPER Concrete. In all specimens, the actual yield strengths of the headed bars over 600 MPa were developed. Some headed bars were fractured due to the high anchorage capacity in SUPER Concrete. Therefore, the headed bar with only $4d_b$ embedment length in 120 MPa SUPER Concrete can develop a yield strength of 600 MPa which is the highest design yield strength permitted by the KCI design code. The previous model derived from tests with normal concrete and the current design code underestimate the anchorage capacity of the headed bar anchored in SUPER Concrete. Because the previous model and the current design code do not consider the effects of the high tensile strength of SUPER Concrete. From a regression analysis assuming that the anchorage strength is proportional to $(f_{ck})^{\alpha}$, the model for predicting anchorage strength of headed bars in SUPER Concrete is developed. The average and coefficient of variation of the test-to-prediction values are 1.01 and 5%, respectively.

• Journal of IKEEE
• /
• v.22 no.2
• /
• pp.495-498
• /
• 2018

In this paper, we propose an DAP system for dose evaluation of medical and industrial X-ray generator. Based on the DAP measurement technique using the Ion-Chamber, the proposed system can clearly measure the exposure radiation dose generated by the diagnostic X-ray apparatus. The hardware part of the DAP measures the amount of charge in the air that is captured by an X-ray. The high-speed processing algorithm part for cumulative radiation dose measurement through microcurrent measures the amount of charge captured by X-ray at a low implementation cost (power) with no input loss. The wired/wireless transmission/reception protocol part synchronized with the operation of the X-ray generator improves communication speed. The PC-based control program part for interlocking and aging measures the amount of X-ray generated in real time and enables measurement graphs and numerical value monitoring through PC GUI. As a result of evaluating the performance of the proposed system in an accredited testing laboratory, the measured values using DAP increased linearly in each energy band (30, 60, 100, 150 kV). In addition, since the standard deviation of the measured value at the point of 4 division was ${\pm}1.25%$, it was confirmed that the DAP showed uniform measurements regardless of location. It was confirmed that the normal operation was not less than ${\pm}4.2%$ of the international standard.

• Journal of IKEEE
• /
• v.23 no.4
• /
• pp.1457-1460
• /
• 2019

In this paper, we proposed the development of a mixed sensor parts for integrated radiation exposure protection fireman's life-saving alarm that can be location-tracked and irradiated. To measure radiation exposure dose, we use the PIN-Diode radiation measurement sensor module, a semi-conductive radiation measurement sensor that can minimize size and weight. The design for removing leakage current is carried out to enhance the characteristics of the radiation measurement sensor using PIN-Diode. The IMU sensor module is used to estimate the location of the current fireman at the same time as the accident estimate by adding together the data and the values for acceleration on the three axis. Experiments were conductied by an authorized testing agency to determine the efficiency of the proposed mixed sensor parts for integrated radiation exposure protection fireman's life-saving alarms. The cumulative dose measurement range was measured in the range of 10 μSv to 10 mSv, the highest level in the world. The accuracy was measured from ±6.3% to ±9.0% (137 Cs) and normal operation was found at the international standard of ±15%. In addition, positional accuracy was measured within ±10%, resulting in a high level of results, demonstrating its effectiveness. Therefore, it is expected that more firemen will be able to provide with superior performance integrated radiation exposure protection fireman life-saving alarm.

• Journal of Broadcast Engineering
• /
• v.20 no.6
• /
• pp.901-911
• /
• 2015

Many studies tried to develop a 3D display based stereo test as a substitute for the conventional stereo test. Although many 3D monitor based stereo tests have various advantages over the conventional stereo tests with printed stimuli, they have a crucial limitation in manipulating disparity. The least value for disparity manipulation is one pixel, which is too big to screen the normal stereo acuity in pc environment with a short viewing distance. In this explorative study, a Gabor image was employed as a test stimulus, because its position can be manipulated by changing its phase information, which allows sub-pixel manipulation for disparity. Instead of employing the methods of the conventional stereo tests where measurement was made only once for each of a wide range of disparity values, 10 replications were administrated for each of 6 disparity levels. The results from the test using Gabor images were compared with those using random dot stimulus because the latter stimulus was exactly the same as that of the conventional stereo test. The correlation coefficient between two tests was found to be moderate. After one month later, the whole test was repeated in the same settings. The correlation coefficient between test and retest results from Gabor images was found to be as high as that from a random dot stimulus, implying high test-retest reliability. These results suggest that a Gabor stimulus could be used as a test stimulus for the valid and reliable stereo test, even in the limited condition, such as 3D environment with a short viewing distance and a condition for evaluating the stereo acuity very precisely.

• Journal of Bio-Environment Control
• /
• v.12 no.4
• /
• pp.228-234
• /
• 2003

Various hydration treatments have been devised to improve the rate and univormity of seed germination as well as seed viability. Hydropriming and priming, the imbibitaion of seeds in distilled water and osmotic solutions, respectively, are useful techniques for early establishment of uniform seedlings. In this study, the optimum conditions were determined for hysropriming of cucumber seeds. Effects of hydropriming were also compared to those of osmotic priming. Seeds, hydroprimed with distilled water and primed with 50 mM $NaNO_3$at 20 for 24 hour, showd shorter number of days required to reach 50% of the final germination percentage ($T_{50}$), and mean number of days to germinate (MDG) that those untreated seeds. Hydroprimed with 10 mL distilled water showed better results in improving the rate of germination thatn other treatments tested. Hydropriming of the aged seeds improved germination percentage at 15$^{\circ}C$ and 25$^{\circ}C$. The $T_{50}$ and MDG values were reduced significantly by hydropriming of the aged seeds regardless of germination temperature. In addition to being simple and inexpensive, the hydropriming resulted in early germination at low temperature. he hydropriming was also effective in increase of germination percentage and normal seedlings.

• The Journal of the Korea Contents Association
• /
• v.12 no.12
• /
• pp.335-344
• /
• 2012

Osteoporosis is increasing in Korea as it becomes an aging society with the rapid economic growth and the development of medical technology. Osteoporosis also develops due to chemo and radiation therapy of cancer which also increases owing to Westernized diet. Osteoporosis is caused by reduced bone density, has close relationship with the change of geometry of proximal femur, which is a factor of hip fracture risk. The purpose of this study was the analysis of the correlations of osteoporosis and the change of geometry of proximal femur, which was observed according to T-score variance. The 350 male and female patients are chosen from D hospital in Busan, who were classified by age, sex and T-score values (normal, osteopenia, and osteo porosis). The results show that the age and gender have significant difference in the incidence of osteoporosis; the disease classification according to T-score value has significant difference in the geometry of the proximal femur such as Cortical ratio calcar, Cortical ratio shaft, Hip/shaft Angle, Strength index, Section modulus, CSMI, and CSA, and is highly correlated with the incidence of osteoporosis. Therefore, the findings of this research is that the change of the geometry of the proximal femur could be used as an indicator in the diagnosis of osteoporosis, could enhance the accuracy of the diagnosis in the future, and could be used as a clinical predictive factors through the analysis of the correlations of T-score variance and the geometry changes of the proximal femur.

• Archives of Reconstructive Microsurgery
• /
• v.19 no.1
• /
• pp.12-20
• /
• 2010

Purpose: Industrial punch accidents involving fingers cause segmental injuries to tendons and neurovascular bundles. Although multiple-level segmental amputations are not replanted to regain function, most patients with an amputated finger want to undergo replantation for cosmetic as much as functional reason. The authors describe four cases of digital amputation by an industrial punch that involved the reinstatement of the amputated finger involving a joint and neurovascular bundle. Amputated segments were replanted to restore amputated surfaces and distal segments. Methods: A single institution retrospective review was performed. Inclusion criteria of punch injuries requiring replantation were applied to patients of all demographic background. Injury extent (size, tissue involvement), operative intervention, pre- and postoperative hand function were recorded. Result: Four cases of amputations were treated at our institute from 2004 to 2008 from industrial punch machine injury. Average patient age was 32.5 years (25~39 years) and there were three males and one female. Sizes of amputated segments ranged from $1.0{\times}1.0{\times}1.2\;cm^3$ to $3{\times}1.5{\times}1.6\;cm^3$. Tenorrhaphy was conducted after fixing fractured bone of the amputated segments with K-wire. Proximal and distal arteries and veins were repaired using the through & through method. The average follow-up period was thirteen months (2~26 months), and all replanted cases survived. Osteomyelitis occurred in one case, skin grafting after debridement was performed in two cases. Because joints were damaged in all four cases, active ranges of motion were much limited. However, a secondary tendon graft enhanced digit function in two cases. The two-point discrimination test showed normal values for both static and dynamic tests for three cases and 9 mm and 15 mm by dynamic and static testing, respectively, in one case. Conclusion: Though amputations from industrial punch machines are technically challenging to replant, our experience has shown it to be a valid therapy. In cases involving punch machine injury, if an amputated segment is available, the authors recommend that replantation be considered for preservation of finger length, joint mobility, and overall functional recovery of the hand.