• 임산에너지
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• 제7권1호
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• pp.1-10
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• 1987

우리나라 남부지방의 대표적 조림수종인 삼나무 20년생과 편백 25년생을 대상으로 $400m^2(20m{\times}20m)$의 조사구를 설정하고, 생산구조와 물질생산량을 조사하였다. 각 조사구로부터는 직경급별로 안배한 각 수종별 9주의 표본목을 벌채하여 1m의 계층으로 절단하고 줄기(Ws), 가지(Wb), 잎(Wl)부위로 나누어 생산량을 측정한 후 건조량을 계산하였다. 엽에 대해서는 소지로부터 엽을 분리하기가 어려우므로 소지의 양을 포함하여 엽량으로 하였다. 생산구조에 있어서 엽은 두 수종 모두 6.2m 부위에서부터 시작되었고 최대엽량부위는 수관의 2/3 지점으로서 거의 동일하게 나타났다. 현존량은 삼나무림 108.75ton/ha, 편백림 112.56ton/ha로 추정되었다. 현존량구성비는 삼나무림에서 줄기, 잎, 가지, 편백림에서는 줄기, 가지, 잎 순으로 서로 다르게 나타났다. 순생산량은 삼나무림 13.32ton/ha/yr로 추정되었으며, 구성비는 줄기, 잎, 가지 순으로 동일하게 나타났다. 생산능률면에서 순동화율을 삼나무림 1.10kg/kg/yr, 편백림 1.21kg/kg/yr, 건재생산능률은 0.71kg/kg/yr, 0.75kg/kg/yr, 현존량축적률은 삼나무림 8.61kg/kg/yr, 편백림 9.63kg/kg/yr로 각각 나타났다.

• Asian-Australasian Journal of Animal Sciences
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• 제29권3호
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• pp.396-403
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• 2016

The aim was to determine the relative bioavailability of phosphorus (P) in peas for 21-day old broiler chickens using slope-ratio assay. One hundred and sixty eight male Ross 308 broiler chicks were divided into 42 groups 4 balanced for body weight and fed 7 diets in a completely randomized design (6 groups/diet) from day 1 to 21 of age. The diets were a corn-soybean meal basal diet, and the corn-soybean meal basal diet to which monosodium phosphate, brown- or yellow-seeded pea was added at the expense of cornstarch to supply 0.5% or 1% total phosphorus. Monosodium phosphate was included as a reference, and hence the estimated bioavailability of P in pea cultivars was relative to that in the monosodium phosphate. Birds and feed were weighed weekly and on d 21 they were killed to obtain tibia. The brown-seeded pea contained 23.4% crude protein, 0.47% P, whereas the yellow-seeded pea contained 24.3% crude protein and 0.38% P. Increasing dietary P supply improved (p<0.05) chick body weight gain and tibia ash and bone density. The estimated relative bioavailability of p values for brown- and yellow-seeded peas obtained using final body weight, average daily gain, tibia ash, and bone mineral density were 31.5% and 36.2%, 35.6% and 37.3%, 23.0% and 5.60%, and 40.3% and 30.3%, respectively. The estimated relative bioavailability of p values for brown- and yellow-seeded peas did not differ within each of the response criteria measured in this study. In conclusion, the relative bioavailability of P in pea did not differ depending on the cultivar (brown- vs yellow-seed). However, the relative bioavailability of P in pea may vary depending on the response criterion used to measure the bioavailability.

• Journal of Radiation Protection and Research
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• 제3권1호
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• pp.6-22
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• 1978

High energy electron beams took effect for tumor radio-therapy, however, had a lot of problems in clinical application because of various conversion factors and complication of physical reactions. Therefor, we had experimentally studied the important properties of high energy electron beams from the linear accelerator, LMR-13, installed in Yonsei Cancer Center. The results of experimental studies on the problems in the 8, 10, 12 Mev electron beam therapy were reported as following. 1. On the measurements of the outputs and absorbed doses, the ionization type dosimeters that had calibrated by $^{90}Sr$ standard source were suitable as under 3% errors for high energy electrons to measure, but measuring doses in small field sizes and the regions of rapid fall off dose with ionization chambers were difficult. 2. The electron energy were measured precisely with energy spectrometer consisted of magnet analyzer and tele-control detector and the practical electron energy was calculated under 5% errors by maximum range of high energy electron beam in the water. 3. The correcting factors of perturbated dose distributions owing to radiation field, energy and material of the treatment cone were checked and described systematically and variation of dose distributions due to inhomogeneous tissues and sloping skin surfaces were completely compensated. 4. The electron beams, using the scatterers; ie., gold, tin, copper, lead, aluminium foils, were adequately diffused and minimizing the bremsstrahlung X-ray induced by the electron energy, irradiation field size and material of scatterers, respectively. 5. Inproving of the dose distribution from the methods of pendulum, slit, grid and focusing irradiations, the therapeutic capacity with limited electron energy could be extended.

• Journal of Veterinary Science
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• 제23권5호
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• pp.66.1-66.8
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• 2022

Background: Prospective clinical study of blood lactate concentration in horses undergoing colic surgery is needed to determine utility in outcome prediction. Objectives: To evaluate venous lactate measurements in horses following colic surgery, including immediately after anesthetic recovery and daily throughout hospitalization, as well as to determine if lactate concentrations were significantly higher in horses that developed postoperative complications or did not survive to hospital discharge. Methods: Horses > 1 year of age undergoing surgery for colic and recovered from general anesthesia were sampled. A portable lactate meter was used to measure venous samples collected immediately following anesthetic recovery and daily throughout hospitalization. Complications arising during hospitalization and survival to hospital discharge were recorded. Results: Fifty one horses were enrolled, ranging in age from 2 to 29 years. Lactate concentration immediately following anesthetic recovery was higher in horses that developed complications during hospitalization (p = 0.046). The odds of developing complications postoperatively were doubled for horses with a venous lactate concentration > 5 mmol/L. Lactate measurements in non-survivors were significantly higher compared to survivors by 96 h postoperatively (p < 0.006). Conclusions: Higher venous lactate concentrations in the postoperative colic period were associated with an increased risk of complications and death. Results suggest horses with higher venous lactate measurements in recovery are more likely to have postoperative complications, with the odds of developing complications doubled for horses with a venous lactate > 5 mmol/L. Evaluation of venous lactate could provide information on prognosis in the postoperative period for horses with surgical colic.

• Nuclear Engineering and Technology
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• 제56권7호
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• pp.2821-2827
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• 2024

This investigation developed a novel polyester composite based on the addition of zinc oxide (ZnO) of different sizes. We prepared nine samples Containing different percentages and sizes of ZnO as well as the control sample (Pol-ZnO0). The attenuation factors of Pol-micro ZnO were estimated using Phy-x software, while the HPGe detector and various gamma sources were used to experimentally measure the all-prepared composites. In terms of the two methods for micro composites, good agreement was observed. The linear attenuation coefficient (LAC) of Pol-ZnO20, Pol-ZnO40, and Pol-ZnO60, two more samples one with ZnO nanoparticles instead of microparticles, and the other with half microparticles and half nanoparticles (referenced as 0.5 M + 0.5 N) were determined. For all the Polyester composites and energies, the mixture of microparticles and nanoparticles had greater LAC values than each of the particles on their own. For example, the LAC values for the Pol-ZnO20 polymer at 1.330 MeV are 0.0836, 0.0888, and 0.0903 cm^-1 for the microparticles, nanoparticles, and mixture, respectively. The values of the prepared polymer samples' radiation protection efficiency (RPE) against energy with a thickness of 2 cm was determined experimentally. The Pol-ZnO60 0.5 M + 0.5 N sample has the highest RPE out of all the samples, followed by its nanoparticle counterpart, and then its microparticle counterpart. On the other hand, the Pol-ZnO0 sample, the polymer with no ZnO content, at all energies has the lowest RPE, followed by the three Pol-ZnO20 samples.

• Asian-Australasian Journal of Animal Sciences
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• 제16권2호
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• pp.269-276
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• 2003

We studied the gel properties of porcine collagen with microbial transglutaminase (MTGase) as a catalyst. A creep meter was used to measure the mechanical properties of gel. The results showed samples with high concentration of MTGase gelled faster than those with a low concentration of MTGase. The gel strength increased with incubation time and the peaks of breaking strength for 0.1, 0.2 and 0.5% MTGase were obtained at 40, 20 and 10 min incubation time, respectively. According to SDS-PAGE, the MTGase was successfully created a collagen polymer with an increase in molecular weight, whereas no change in formation was shown without MTGase. The sample with 0.5% MTGase began to polymerize after 10 or 20 min incubation at $50^{\circ}C$, and complete polymerization occurred after 40-60 min incubation. Scanning electron microscopic analysis revealed that the gel of porcine collagen in the presence of MTGase produced an extremely well cross-linked network. The differential scanning calorimetric analysis showed the peak thermal transition of porcine collagen gel was at $36^{\circ}C$, and that with MTGase no peak was detected during heating from 20 to $120^{\circ}C$. The melting point of porcine collagen gel could be controlled by MTGase concentration, incubation temperature and protein concentration. Knowledge of the structural and physicochemical properties of porcine collagen gel catalyzed with MTGase could facilitate their use in food products.

• 한국보육지원학회지
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• 제6권2호
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• pp.117-133
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• 2010

본 연구에서는 감각적 영성 활동이 유아가 지각한 유아의 자기 효능감에 미치는 효과를 규명하는데 그 목적이 있다. 연구대상은 U시에 소재한 C 보육시설과 H 보육시설에 다니는 만 4, 5세 유아 36명이었다. 실험을 하기에 앞서 전인옥(1996)이 번안하고 본 연구자가 재수정한 자기 효능감 검사를 실험집단과 비교집단 유아에게 실시하였다. 감각적 영성 활동은 통제 집단 유아를 대상으로 2009년 1월 19일에서 2월 16일까지 이루어졌고, 비교집단에는 일반적인 보육과정을 실시했다. 실험이 끝나고 나서 실험집단과 비교집단에 사후검사를 하였다. 연구 결과 감각적 영성 활동은 자기 효능감에 유의한 효과가 있었다. 하위영역인 신체적 영역, 사회정서적 영역, 인지적 영역에서 모두 효과가 있었다.

• 대한의용생체공학회:의공학회지
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• 제28권2호
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• pp.310-315
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• 2007

The axial-flow type blood pump(XVAD) which has been developed in our group consists of mechanical parts (an impeller, a diffuser and a flow straightener) and electrical parts (a motor and a magnetic bearing). The magnetic bearing system fully levitates the impeller to remove mechanical coupling with other parts of the pump with constant gap, which needs non-contact type gap sensing. Conventional gap sensors are too large to be adopted to the implantable axial -flow type blood pump. Thus, in this paper, the compact eddy current type gap sensor system proper for the implantable axial-flow type blood pump was developed and its performance was evaluated in vitro. The developed eddy current type gap sensor system is a transformer type and has a differential probe. Sensor coil(probe) has small dimensions(6 mm diameter, 2 mm thickness) and its optimal inductance was determined as 0.068 mH for the measurement range of $0\sim3mm$. It could be manufactured with 130 turns of the 0.04 mm diameter copper coil. The characteristics of the developed eddy current type gap sensor system was evaluated by in vitro experiment. At experiment, it showed satis(actory performance to apply to the magnetic bearing system of the XVAD. It could measure the gap up to 3mm, but the linearity was decreased at the range of $1.8\sim3.0mm$. Moreover, it showed no difference in different media such as the water and the blood at the temperature range of $35\sim40^{\circ}C$.

• Journal of Korean Neurosurgical Society
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• 제55권5호
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• pp.244-247
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• 2014

Objective : The aim of this study was to evaluate the microanatomy and histological features of the central myelin in the root exit zone of facial nerve. Methods : Forty facial nerves with brain stem were obtained from 20 formalin fixed cadavers. Among them 17 facial nerves were ruined during preparation and 23 root entry zone (REZ) of facial nerves could be examined. The length of medial REZ, from detach point of facial nerve at the brain stem to transitional area, and the thickness of glial membrane of central myelin was measured. We cut brain stem along the facial nerve and made a tissue block of facial nerve REZ. Each tissue block was embedded with paraffin and serially sectioned. Slices were stained with hematoxylin and eosin (H&E), periodic acid-Schiff, and glial fibrillary acid protein. Microscopy was used to measure the extent of central myelin and thickness of outer glial membrane of central myelin. Thickness of glial membrane was examined at two different points, the thickest area of proximal and distal REZ. Results : Special stain with PAS and GFAP could be differentiated the central and peripheral myelin of facial nerve. The length of medial REZ was mean 2.6 mm (1.6-3.5 mm). The glial limiting membrane of brain stem is continued to the end of central myelin. We called it glial sheath of REZ. The thickness of glial sheath was mean $66.5{\mu}m(40-110{\mu}m$) at proximal REZ and $7.4{\mu}m(5-10{\mu}m$) at distal REZ. Conclusion : Medial REZ of facial nerve is mean 2.6 mm in length and covered by glial sheath continued from glial limiting membrane of brain stem. Glial sheath of central myelin tends to become thin toward transitional zone.

• 대한정형도수물리치료학회지
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• 제8권2호
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• pp.5-17
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• 2002

The aim of study carried out to determine the effects of myofascial release on the cranial arteries velocity from November 11, 2001 to March 29, 2002 the objects were 10 patients who having the tension-type headache at H-hospital This research compared with measure the mean flow velocity middle cerebral artery, posterior cerebral artery, vertebral cerebral artery. Result obtain were as follows; 1. Middle cerebral artery blood velocity between pre treatment and after treatment for 10days experiment was significantly increased 9.76cm/s(p<0.05)in right, 4.88cm/s(p<0.05)in left. 2. Posterior cerebral artery blood velocity between pre treatment and after treatment experiment was difference 6.35cm/s(p<0.01)in right, 5.14cm/s(p<0.01)in left, between pre treatment and after treatment for 5days experiment was 11.48cm/s(p<0.01)in right, 10.74cm/s(p<0.01)in left, between pre treatment and treatment for 10days experiment was 12.92cm/s(p<0.001) in right, 12.68cm/s(p<0.001) in left. 3. Vertebral artery blood velocity between pre treatment and post treatment experiment was difference 4.48cm/s(p<0.05)in right, 6.10cm/s(p<0.05) in left, between pre treatment and after treatment for 5days experiment was 12.50cm/s(p<0.001)in right, 14.40cm/s(p<0.001)in left, between pre treatment and after treatment for 10days experiment was 14.70cm/s(p<0.001)in right, 13.90cm/s(p<0.001)in left.