• 대한한의학회지
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• 제25권1호
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• pp.21-30
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• 2004

Objectives : We aimed to identify the effects of Heechum-san(HCS) On the thrombosis. Methods : We measured the protective effects of HCS on pulmonary thromboembolism induced by collagen and epinephrine, intravascular coagulation induced by dextran. Results : HCS showed a effective inhibition on coagulation of platelets induced by ADP or epinephrine. HCS showed survival rate of 14.28% on pulmonary thrombo- embolism caused by collagen and epinephrine. On the measure of the blood flow rate induced by the thrombus, in vivo HCS accelerated the blood flow rate. Conclusions : HCS has antithrombotic effects.

• 한국미생물·생명공학회지
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• 제29권4호
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• pp.212-220
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• 2001

S. cerevisiae HBC52와 S, diataticus K114 의 rare mating 에 의해 개발된 HCS 균주들은 크기가 약 $13\mu\textrm{m}$ karyotype 분석결과 K114 균주에만 있는 약 1150kb 분자량을 가지는 염색체 band를 유지하였으며 전분을 분해하여 halo 를 형성하였다. Glucoamylase 활성은 약 2.7~3.4 unti/ml 를 가진 균주임이 밝혀졌으며 당 발효실험과 응집성 실험을 수행한 결과 HBC52 균주와 유사한 당 발효특성을 보이고 응집성 특성도 약응집성의 floculation type으로 비슷하였다. 그리고 HCS 균주의 포자형성과 피막형성 유무 실험에서는 양조효모인 HBC52 균주와 같이 포자가 형성되지 않았으며, 피막도 형성되지않았다. 균주들의 최종당도 실험은 HBC52균주가 약 68%의 발효수준을 나타냈고, HCS 균주들은 이 보다 높은 76~78%의 수준을 보였따. 즉 HBC52 균주가 최종당도($ 2.00^{\circ}$P)를 보인 반면 HCS 균주들은 ($0.7~0.93^{\circ}$P)를 보이는 결괄르 나타내어 맥주양조에서 low carbohydrate beer를 생산할 수있음이 확인되었다.

• 청정기술
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• 제24권3호
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• pp.183-189
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• 2018

중공형 구형 탄소(hollow carbon spheres, HCS) 또는 구형 탄소(carbon spheres, CS)는 수열합성법에 의해 제조되었고 $MnO_2$를 증착하기 위한 탄소 지지체로 사용하였다. $MnO_2$는 화학적 레독스 증착법에 의해 HCS 또는 CS 표면에 증착하였다. 화학적 산화환원 증착법은 미립자 지지체의 표면에 다른 산화물 합성에 특히 효과적이다. $MnO_2$는 HCS 또는 CS의 표면에 일정한 슬릿 모양의 분포를 보였고 HCS 표면에서 보다 엉성한 슬릿 모양의 $MnO_2$ 입자가 생성되었다. $MnO_2-HCS$는 $20mv\;s^{-1}$의 스캔 속도에서 초기 사이클에서 약 $164.1F\;g^{-1}$의 정전용량을 나타내었고 1000 사이클 후에는 약 $141.3F\;g^{-1}$의 정전용량을 나타내었다. 1000 사이클 기준으로 $MnO_2-HCS$와 $MnO_2-CS$는 각각 86%와 78%의 용량유지율을 나타내었다. 이것은 HCS 표면에서 엉성한 슬릿모양의 $MnO_2$의 성장이 전해질의 흐름 및 전해질 내의 $Na^+$ 이온의 흡탈착이 보다 용이하여 나타난 결과로 생각된다.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2016년도 춘계 학술논문 발표대회
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• pp.101-102
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• 2016

Through the story height reducing method, cost saving can be implemented in many aspects. Recently, as one of PC floor system, HCS(Hollow Core Slab) has been applied in many project, and it is proved that it is excellent in productivity, economic efficiency, and workability as well. We developed a new composite beam(ANI Girder) which can be associated with HCS and reinforced with a truss-shape rebar and angle. As a result of actual application on underground parking building with HCS, it is confirmed that this system is effective in workability and story height reducing.

• Computers and Concrete
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• 제14권3호
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• pp.211-231
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• 2014

Prestressed hollow-core slabs (HCS) are widely used for modern lightweight precast floor structures because they are cost-efficient by reducing materials, and have excellent flexural strength and stiffness by using prestressing tendons, compared to reinforced concrete (RC) floor system. According to the recently revised ACI318-08, the web-shear capacity of HCS members exceeding 315 mm in depth without the minimum shear reinforcement should be reduced by half. It is, however, difficult to provide shear reinforcement in HCS members produced by the extrusion method due to their unique concrete casting methods, and thus, their shear design is significantly affected by the minimum shear reinforcement provision in ACI318-08. In this study, a large number of shear test data on HCS members has been collected and analyzed to examine their web-shear capacity with consideration on the minimum shear reinforcement requirement in ACI318-08. The analysis results indicates that the minimum shear reinforcement requirement for deep HCS members are too severe, and that the web-shear strength equation in ACI318-08 does not provide good estimation of shear strengths for HCS members. Thus, in this paper, a rational web-shear strength equation for HCS members was derived in a simple manner, which provides a consistent margin of safety on shear strength for the HCS members up to 500 mm deep. More shear test data would be required to apply the proposed shear strength equation for the HCS members over 500 mm in depth though.

• 한국펄프종이공학회:학술대회논문집
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• 한국펄프종이공학회 2006년도 PAN PACIFIC CONFERENCE vol.1
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• pp.111-116
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• 2006

The microstickes control effects of some fixing agents, including an inorganic PAC, an organic polyamine (PA) and polydiallydimethyl ammonium chloride (Pdadmac), and a high cationic starch (HCS), were investigated, together with their effects on wet end performances and physical properties of handsheets. Despite that the HCS and Pdadmac had lower cationic charge densities than the PA and PAC (the HCS being even lower), they gave higher zeta potentials to fibers, and lower turbidities, cationic demands and residual COD contents to the pulp liquid phases than the PA and PAC did. In all cases, the HCS showed even better effects than the Pdadmac. In addition, drainage speed was also much higher by the HCS treatments although paper formation was worsened. All the phenomena showed that the HCS can fix more dissolved and colloidal substances to cellulose fibers, indicating that the HCS functioned mainly with flocculation and even hydrogen bonding mechanisms. Data on optical properties further indicated that the HCS interacted preferentially with colloidal substances, since it fixed more 'dirty' microstickes to fibers which decreased more sheet brightness while increasing more sheet opacity (with both higher light absorption and scattering coefficients). Interestingly, the organic fixing agents did not decrease tensile, tearing, and folding strengths of paper sheets made from 100% recycled newsprint pulp, except when they were dosed in high amounts. On the contrary, the inorganic PAC had more serious negative effects on the strength properties, especially on folding endurance. The study suggested that proper use of the HCS can lead to better microstickies control effects than traditional agents and methods.

• 대한금속재료학회지
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• 제50권3호
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• pp.256-262
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• 2012

This study investigated the hydrogen storage properties of Zr-Based $AB_{2-x}M_x$ metal hybride made by HCS (Hydriding Combustion Synthesis). The materials were prepared by HCS 80 wt% $AB_2$-15 wt% Mg-5 wt% Mm, HCS 80 wt% $AB_2$-20 wt% Mg and pure Zr-Based $AB_2$, These materials were activated at 298 K under 20 bar. Both HCS 80 wt% $AB_2$-20 wt% Mg and HCS 80 wt% $AB_2$-15 wt% Mg-5 wt% Mm were absorbed within 1 minute. In the case of the $AB_2$, it was perfectly absorbed within 6 minutes. Then, the materials were evaluated to obtain P-C-T (Pressure-Composition-Temperature) curves at 298K. As a result, the hydrogen storage capacity of HCS 80 wt% $AB_2$-20 wt% Mg, HCS 80 wt% $AB_2$-15 wt% Mg-5 wt% Mm and pure Zr-Based $AB_2$ were determined to be 1.2, 1.6 and 1.74 wt%, respectively. The activation energy and rate controlling step were calculated by the Johnson-Mehl Avrami equation. The activation energies of HCS 80 wt% $AB_2$-20 wt% Mg, HCS 80 wt% $AB_2$-15 wt% Mg-5 wt% Mm and pure Zr-Based $AB_2$ were 26.91, 20.45, and 60.41 kJ/mol, respectively. Also, the values of ${\eta}$ in the Johnson-Mehl Avrami equation for HCS 80 wt% $AB_2$-20 wt% Mg, HCS 80 wt% $AB_2$-15 wt% Mg-5 wt% Mm and pure Zr-Based $AB_2$ are 0.60, 0.51, and 0.44. So, the rate controlling steps which indicate hydrogen storage mechanism are an one dimensional diffusion process.

• 한국생물물리학회:학술대회논문집
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• 한국생물물리학회 2003년도 정기총회 및 학술발표회
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• pp.36-36
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• 2003

Goldfish retina has been well studied to a great extent. In spite of that, electrical characteristics of dissociated horizontal cells(HCs) have not been identified in detail. Thus the cone-and the rod- HCs dissociated from goldfish retina were investigated electrophysiologically using whole-cell patch-clamping recording. To explore the basic electrical property, We examined voltage-dependent channels in all types of HCs. For the futher understanding of GABAergic pathway, the localization and distribution of GABA receptors was examined in cone- HCs including HC axon terminals(ATs).

• 한국구조물진단유지관리공학회 논문집
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• 제27권1호
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• pp.71-77
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• 2023

이 연구에서는 높이가 400 mm인 중공슬래브(Hollow-Core Slab, 이하 HCS)의 구조성능을 평가하기 위한 실대형 실험을 수행하였으며, 기존의 압출성형방식이 아닌 단일몰드방식을 적용하여 총 4개의 HCS를 제작하였다. 실험의 주요 변수는 토핑콘크리트의 유무, 전단보강근의 배치 유무 및 위치로 설정하였으며, 실험체들의 균열패턴 및 하중-변위 응답을 상세히 분석하였다. 실험결과 전단철근이 배치된 HCS 실험체들은 휨강도를 달성하였고, 이후에 최종적인 파괴는 사인장균열에 의하여 지배되었으며, HCS 유닛 웨브 내에 전단철근이 배치되지 않은 실험체들의 경우 설계기준을 통해 산정된 공칭휨강도를 발현하지 못하였다. 전단철근을 HCS 유닛에 배근 할 경우에는 전단강도가 약 8~23% 증가하는 것으로 나타났으며, HCS의 중공을 철근콘크리트로 보강하는 방법보다 전단성능 향상에 더 효과적인 것으로 나타났다.

• 한국식품과학회지
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• 제31권4호
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• pp.999-1004
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• 1999

밤에서 추출한 천연 밤전분(NCS)과 이에 propylene oxide를 반응시켜 제조한 hydroxypro-pyl화 밤전분(HCS)의 이화학적 특성을 비교 검토하였다. 색도는 NCS와 HCS 사이에 별 차이가 없었고, 물결합 능력은 NCS가 233.8%, HCS가 244.5%를 나타내어 HCS의 물결합 능력이 증가하는 양상을 보였다. Hydroxypropylation에 의해 HCS의 청가 및 amylose 함량이 다소 감소하여 전분의 구조가 변형됨을 알 수 있었고 팽화력과 용해도에서도 증가하였다. 0.2% 전분 현탁액으로 광투과도를 측정한 결과 역시 HCS가 NCS에 비해 증가함을 알 수 있었다. DSC와 amylogram을 이용하여 호화 양상을 측정한 결과 hydroxypropylation에 의해 HCS의 호화 온도 및 호화 엔탈피가 감소하여 HCS를 식품가공에 이용할 경우 전분이 호화되는데 필요한 열량이 감소하여 경제적인 잇점이 있을 것으로 생각된다.