들깨의 수용성화합물질과 그들의 타감작용

金海洙,金鐘熙 慶南大學校 附設 基礎科學硏究所 2000 硏究論文集 Vol.14 No.-

생잎과 뿌리 수용추출물이 함유하고 있는 화합물질은 phenolic compounds가 주였고, 잎추출물은 17종 acids와 9종의 비acids화합물질, 뿌리추출물에서는 15종의 acids와 6종의 비acids가 검정 및 동정되었다. 잎과 뿌리의 수용 추출물은 선정된 수용체 식물의 발아를 억제하였으며, 추출액 농도가 높을수록 억제 효과도 컸다. 잎의 경우 발아억제 효과는 고추, 쇠무름, 달맞이꽃 순 이었고, 뿌리는 쇄무름, 달맞이꽃, 고추, 상추 순이었다. 잎 추출물 억제효과는 뿌리추출물 보다 상대적으로 높았다. 그러나 오이, 배추, 무는 잎과 뿌리추출물 모두에서 억제효과가 현저히 낮지는 않았다. 잎과 뿌리의 수용 추출물은 선정된 수용체 식물의 성장에 상당한 억제효과를 일으켰다. 수용추출의 농도증가에 따라 억제효과가 현저히 증가되었으며, 잎의 경우 억제효과가 상대적으로 낮았다. 억제 효과는 잎과 뿌리모두에서 고추, 달맞이, 쇠무름이 낮았으며, 오이에 대한 억제효과가 가장 낮았다. 또한 잎과 뿌리수용추출물의 발아 및 성장 억제효과에서 야생종 쇠무름, 달맞이꽃에서 총체적으로 억제효과가 경작종 보다 높음을 보여주었다. The main compounds in aqueous extract of P. frutescens leaves and roots were the phenolic compounds. 17 acids and 9 non-acids compounds in leaves, 15 acids, and 6 non acids compounds in roots were identified. Aqueous extract of P. frutescens leaf and root had an inhibition effect on the germination of selected receptor plant species. The inhibition effects were higher along with the concentration raising, and inhibition effect from leaf extracts was much higher than in the root extracts. The leaf-extract inhibition effects on Capsicum annuum linne. Achyrant japonica. Oenothera odorta leaf extracts, and root-extract inhibition effects on Achyrant japonica. Oenothera odorta, Capsicum annuum. Lactuca sativa were much higher than others. Aqueous extract of P. frutescens leaves and roots also had inhibition effects on the elongation of selected receptor-plant species. The inhibition effects were represented higher along with the concentration raising, and effects on Capsicum annuum. Achyrant japonica. Oenothera odorta were much higher than others.

들깨(Perilla frutescens) 잎과 줄기에서의 정유특성과 안정성

金海洙,金鐘熙 慶南大學校 附設 基礎科學硏究所 2000 硏究論文集 Vol.14 No.-

5개의 다른 장소에서 경작된 들깨를 대상으로 생잎과 줄기를 채취하여, Gas Chromatography Mass spectrometer(GC-MS)를 이용하여, 잎과 줄기에 함유된 정유의 조성과 함량을 분석하였다. 잎과 줄기의 정유의 조성은 매우 단순하였고(주요 성분은 8종류), 총함량은 건중의 1%정도였고, 그중 2-butanoyl furan 한 성분이 90%이상을 차지하였다. 줄기의 정유조성은 잎과 유사하나 함량은 잎의 1%정도에 불과하였다. 정유 총 함량은 계절에 따라 뚜렷한 차이가 있었고 7월이 가장 높았다. 각각 다른 온도에서 한시간 건조한 들깨잎은 여전히 30℃, 50℃에서는 약 90%, 80℃는 60%, 100℃ 40%이상의 정유를 함유하였고, 염수(salt solution)처리 6개월후의 들깨잎은 염농도와 관계없이 90%이상의 정유를 함유하고 있었다. The composition of essential oil in Perilla frutescens leaves and stems were identified and measured quantitatively by using Gas Chromatography and Mass Spetrometer (GC-MS). The total amount of essential oil in the leaf was much high, the highest total amount exhibited in July and varied with season, but the essential oil composition was much simple(the major composition was only eight kinds) and only 2-butanoyl furan composed over 90% of the total amount. The total amount in stem was very low and the composition also was very simple (only four kinds). After treatment with different temperature.(30℃, 50℃ 80℃ and 100℃), Perilla frutescens leaf still remained much of oil(at 30℃, 50℃ remained 90℃, 80℃ remained 60%, at 100℃ remained 40%) and after treatment with different concentration of salt solution (10%, 30%, 50% 80%)six months, it still remained over 90% of essential oil in fresh leaf.

Cementing failure of the casing-cement-rock interfaces during hydraulic fracturing

Hai Y. Zhu,Jin G. Deng,Jun Zhao,Hu Zhao,Hai L. Liu,Teng Wang 사단법인 한국계산역학회 2014 Computers and Concrete, An International Journal Vol.14 No.1

Using the principle of damage mechanics, zero-thickness pore pressure cohesive elements(PPCE) are used to simulate the casing-cement interface (CCI) and cement-rock interface (CRI). The traction-separation law describes the emergence and propagation of the PPCE. Mohr-coulomb criteria determines the elastic and plastic condition of cement sheath and rock. The finite element model (FEM) of delamination fractures emergence and propagation along the casing-cement-rock (CCR) interfaces during hydraulic fracturing is established, and the emergence and propagation of fractures along the wellbore axial and circumferential direction are simulated. Regadless of the perforation angle (the angle between the perforation and the max. horizontal principle stress), mirco-annulus will be produced alonge the wellbore circumferential direction when the cementation strength of the CCI and the CRI is less than the rock tensile strength; the delamination fractures are hard to propagate along the horizontal wellbore axial direction; emergence and propagation of delamination fractures are most likely produced on the shallow formationwhen the in-situ stresses are lower; the failure mode of cement sheath in the deep well is mainly interfaces seperation and body damange caused by cement expansion and contraction, or pressure testing and well shut-in operations.

Hydraulic fracturing experiments of highly deviated well with oriented perforation technique

Zhu, Hai Y.,Deng, Jin G.,Liu, Shu J.,Wen, Min,Peng, Cheng Y.,Li, Ji R.,Chen, Zi J.,Hu, Lian B.,Lin, Hai,Guang, Dong Techno-Press 2014 Geomechanics & engineering Vol.6 No.2

In order to investigate the effect of different perforation angles (the angle between the perforation direction and the maximum horizontal principal stress) on the fracture initiation and propagation during hydraulic fracturing of highly deviated well in oil & gas saturated formation, laboratory experiments of the hydraulic fracturing had been carried out on the basis of non-dimensional similar criteria by using 400^3 $mm^3$ cement cubes. A plane fracture can be produced when the perforations are placed in the direction of the maximum horizontal principal stress. When the perforation angle is $45^{\circ}$, the fractures firstly initiate from the perforations at the upper side of the wellbore, and then turn to the maximum horizontal principal stress direction. When the well deviation angle and perforation angle are both between $45^{\circ}$ and $90^{\circ}$, the fractures hardly initiate from the perforations at the lower side of the wellbore. Well azimuth (the angle between the wellbore axis and the maximum horizontal principal stress) has a little influence on the fracture geometries; however it mainly increases the fracture roughness, fracture continuity and the number of secondary fractures, and also increases the fracture initiation and propagation pressure. Oriented perforating technology should be applied in highly deviated well to obtain a single plane fracture. If the well deviation angle is smaller, the fractures may link up.

Synthesis and Antiproliferative Activity of 1,4-Bis(dimethylamino)- 9,10-anthraquinone Derivatives against P388 Mouse Leukemic Tumor Cells

Guang-Zhu Jin,Hai-Shan Jin,Li-Li Jin 대한약학회 2011 Archives of Pharmacal Research Vol.34 No.7

A series of 2-substituted-1,4-bis(dimethylamino)-9,10-anthraquinone derivatives were synthesized and their in vitro antiproliferative activities against p388 mouse leukemic tumor cells were evaluated. In addition, the effect of substituents on the phenyl ring was investigated. Among the derivatives tested, seven showed a high antiproliferative effect and three showed a moderate effect. In addition, introduction of a series of substituted phenyl groups into 1,4-bis(dimethylamino)-9,10-anthraquinone at 2-position were shown to enhance its antiproliferative activity. The antiproliferative activity also increased upon substitution of the benzene ring by an electron donating group such as an amine or methoxyl group.

들깨의 수용성화합물질과 그들의 타감작용

김해수(Hai Zhu Jin),김종희(Jong Hee Kim) 경남대학교 기초과학연구소 2000 慶南大學校 基礎科學硏究所 硏究報告 Vol.14 No.-

들깨 ( Perilla frutescens ) 잎과 줄기에서의 정유 특성과 안정성

김해수(Hai Zhu Jin),김종희(Jong Hee Kim) 경남대학교 기초과학연구소 2000 慶南大學校 基礎科學硏究所 硏究報告 Vol.14 No.-

A Robust Adaptive Controller for Markovian Jump Uncertain Nonlinear Systems with Wiener Noises of Unknown Covariance

Jin Zhu,Hong-sheng Xi,Hai-bo Ji,Bing Wang 대한전기학회 2007 International Journal of Control, Automation, and Vol.5 No.2

A robust adaptive controller design for a class of Markovian jump parametric -strict-feedback systems is given. The disturbances considered herein include both uncertain nonlinearities and Wiener noises of unknown covariance. And they satisfy some bound-conditions. By using stochastic Lyapunov method in Markovian jump systems, a switching robust adaptive controller was obtained that guarantees global uniform ultimate boundedness of the closed-loop jump system.

Perforation optimization of hydraulic fracturing of oil and gas well

Zhu, Hai Yan,Deng, Jin Gen,Chen, Zi Jian,An, Feng Chen,Liu, Shu Jie,Peng, Cheng Yong,Wen, Min,Dong, Guang Techno-Press 2013 Geomechanics & engineering Vol.5 No.5

Considering the influences of fluid penetration, casing, excavation processes of wellbore and perforation tunnels, the seepage-deformation finite element model of oil and gas well coupled with perforating technique is established using the tensile strength failure criterion, in which the user-defined subroutine is developed to investigate the dynamic evolvement of the reservoir porosity and permeability. The results show that the increases of perforation angle and decreases of perforation density lead to a higher fracture initiation pressure, while the changes of the perforation diameter and length have no evident influences on the fracture initiation pressure. As for initiation location for the fracture in wellbore, it is on the wellbore face while considering the presence of the casing. By contrast, the fractures firstly initiate on the root of the tunnels without considering casing. Besides, the initial fracture position is also related with the perforation angle. The fracture initiation position is located in the point far away from the wellbore face, when the perforation angle is around $30^{\circ}$; however, when the perforation angle is increased to $45^{\circ}$, a plane fracture is initiated from the wellbore face in the maximum horizontal stress direction; no fractures was found around perforation tunnels, when the angel is close to $90^{\circ}$. The results have been successfully applied in an oilfield, with the error of only 1.1% comparing the fracture initiation pressure simulated with the one from on-site experiment.

Preparation of AgCl/Ag₃PO₄/Diatomite Composite by Microemulsion Method for Rapid Photo-Degradation of Rhodamine B with Stability under Visible Light

Zhu, Hai-Tao,Ren, Qi-Fang,Jin, Zhen,Ding, Yi,Liu, Xin-Yu,Ni, Xi-Hui,Han, Meng-Li,Ma, Shi-Yu,Ye, Qing,Oh, Won-Chun Materials Research Society of Korea 2020 한국재료학회지 Vol.30 No.8

In this paper, AgCl/Ag₃PO₄/diatomite photocatalyst is successfully synthesized by microemulsion method and anion in situ substitution method. X-ray diffraction (XRD), photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), transmission electron microscopy (TEM), and ultraviolet-visible spectroscopy (UV-Vis) are used to study the structural and physicochemical characteristics of the AgCl/Ag₃PO₄/diatomite composite. Using rhodamine B (RhB) as a simulated pollutant, the photocatalytic activity and stability of the AgCl/Ag₃PO₄/diatomite composite under visible light are evaluated. In the AgCl/Ag₃PO₄/diatomite visible light system, RhB is nearly 100 % degraded within 15 minutes. And, after five cycles of operation, the photocatalytic activity of AgCl/Ag₃PO₄/diatomite remains at 95 % of the original level, much higher than that of pure Ag₃PO₄ (40 %). In addition, the mechanism of enhanced catalytic performance is discussed. The high photocatalytic performance of AgCl/Ag₃PO₄/diatomite composites can be attributed to the synergistic effect of Ag₃PO₄, diatomite and AgCl nanoparticles. Free radical trapping experiments are used to show that holes and oxygen are the main active species. This material can quickly react with dye molecules adsorbed on the surface of diatomite to degrade RhB dye to CO₂ and H₂O. Even more remarkably, AgCl/Ag₃PO₄/diatomite can maintain above 95 % photo-degradation activity after five cycles.