나비目 終齡幼蟲의 血球에 關한 電顯的 硏究

梁凞永,李鳳熙,鄭啓憲 순천향의과대학 1979 Journal of Soonchunhyang Medical Science Vol.2 No.1

Morphological studies on larval hemocytes of varioius insects were performed in two ways of research. Ⅰ. Finestructures. An electron microscopical study on hemocytes of last instar larvae of 12 species of Lepidoptera was performed to observe cell types, structrues, raions, relationships and their origins. The results are as follows; 1) Prohemocytes are the smallest round cells with large numlesus, poorly developed cytoplasmic organelles and lower composition ratio, accounting for less than 5% of all cell types. Little remarked differences were revealed among prohemocytes of varous insects and they are thought to be the origins of other cell types. 2) Palsmatocytes are relatively large cells with higher composition ration, accounting for about 40%. They could be subdivided into two forms, oval and spindle. Oval cells are rich in cytoplasmic projections and organelles. But the spindle cells include few of them, while nearly all of the spindle cells possess some microtubules as their cytoskeletons. Some marked difference were revealed among different insects. The most exceptional structure was the fibrous bundles located in both nucleus and cytoplasm in Sericinus telamon Donovan. 3) Granular cells are characterized by various granules in cytoplasm, and by higher composition ration, accounting for about 50% of all numbers. They could be subdivided into three forms, oval, round and spindle with fully developed cytoplasmic organelles and Projections. Cellular fractions were often noticed to be enclosed by granular cells, indicating some activities of phagocytosis. Granular cells are the most pleomo rphous of all cell types, and the most exceptional structures are the bundles of microfibrils in Phalerodonta manleyi Leech. 4) Adipohemocyte were found only in Plodia interpunctella Hubner. They are somewhat oval with few cytoplamic projections and less developed organelles. Some granular cells were found to accumulate lipid droplets into the cytoplasm by trapping floating lipid droplets, adn the adipohemocytes are believed to be originated from formers. 5) Sperule cells were found nearly in all specimens and characterized by sperules composed of flocculent materials. They are round or oval with few cytoplasmic organelles. The most conspicuous spherulesof all sperule cells were radial arrangement of sperules in Adristyrannus amurensis Staudinger and presence of the specific granules in Mamestra illoba Butler. Young sperule cells resembled the granular cells and it is possible that they originate from granular cells. 6) Oenocytoids are large cells and were found nearly in all specimens. They could be subdivided into 3 types according to their inclusions, such as microfibrils, microtubules and none of them. Young Oenocytoids resemble the giant plasmatocytes, perhaps in dicating to be originated from the latters. Ⅱ. Composition ratios of cell types from mid 5-instar to late prepupa. Composition ratios of cell types were investigated in phalerodonta manley; Leech and could be summarized as follows; 1) Prohemocytes disappeared from the stage of early prepupa. 2) Plasmatocytes increased in number at mid stages of each inster and decreased nearing to pupal stage. 3) Granular cells reached peak at early prepupal stage. 4) Adipohemocytes heavily increased at late prepupal stage. 5) Sperule cells increased at late stage of each instar and reached peak at late prepupal stage. 6) Oenocytoids increased at late stage of each instar and reached peak at early prepupal stage.

배추흰나비 食道下神經節의 神經細胞에 관한 形態學的 硏究

梁熙永,李鳳熙,金宇甲 순천향대학교 1985 논문집 Vol.8 No.1

The study on the nerve cells in the subesophageal ganglion of adult cabbage butterfly (Pi-eris rapae L.) was performed to observe their structural characteristics. The subesophageal ganglion which had been associated to rear part of brain in the process of metamorphosis of larva to pupa was consisted of neuropile in the central region and nerve cell bodies in the rind. The nerve cell bodies were divided into three types on basis of their shapes, sizes and presence of neurosecretory granules, etc. In type I nerve cells the sizes of their cell bodies were 9.5 to 14.5μm in diameter and those of their nuclei were 7.0 to 12.0μm. The type I nerve cells which were the most typical neurons of brain nerve cells from cabbage butterflies had round or ellipsoid shapes. The type Ⅱ nerve cells had a variety of shapes, i.e., round, ellipsoid or triangle, and their sizes were 14.5 tp 20.0μm in diameter. The type Ⅱ nerve cells which included a number of neurosecretory granules were considered neurosecretory cells. The type Ⅲ nerve cells had the smallest sizes of approximately 4.5μm in diameter and their nuclei were about 2.5μm. These cells had no secretory granules in their cell bodies.

商法 第633條 不利益變更禁止原則 適用에 있어서 問題點 : 催告制度와 關聯하여 Regarding the Principle of the Peremtory notice

양해환 한국기업법학회 2001 企業法硏究 Vol.8 No.-

The Insurance Contract Law is private law, but nevertheless it restricts the principle of private autonomy by the Article 663 of Commercial Law. Under the Article 663 any special free contract between parties is not allowed, except reinsurance, marine insurance and other similar kinds of insurance policies. In this study I examine some serious problems of peremptory notice under the Article 650 Clause 2 regarding the principle of the disadvantage forbidden alteration.

운전사 작업복 실태조사 연구

박정숙,서영선,서한희,성양희 연세대학교 생활과학대학 1972 婦學 Vol.5 No.-

Preparation of Ni Nanoparticles-TiO₂ Nanotube Arrays Composite and Its Application for Electrochemical Capacitor

He, Huichao,Zhang, Yunhuai,Xiao, Peng,Yang, Yannan,Lou, Qing,Yang, Fei Korean Chemical Society 2012 Bulletin of the Korean Chemical Society Vol.33 No.5

Ni nanoparticles-$TiO_2$ nanotube arrays (Ni/$TiO_2NTs$) composites were prepared by pulsed electrodeposition method and subsequently characterized by means of field emission scanning electron microscopy (FESEM), X-ray diffraction (XRD) and energy dispersive X-ray spectroscopy (EDX). The FESEM results showed that highly dispersed Ni nanoparticles were not only loaded on the top of the $TiO_2NTs$ but also within the tubular structure, and the particle size of Ni prepared at different current amplitude (100, 200 and 300 $mA{\cdot}cm^{-2}$) was in the range of 15 to 70 nm. The electrochemical studies indicated that Ni nanoparticles loaded on the highly ordered $TiO_2NTs$ are readily accessible for electrochemical reactions, which improve the efficiency of the Ni nanoparticles and $TiO_2NTs$. A maximum specific capacitance (27.3 $mF.cm^{-2}$) was obtained on the Ni/$TiO_2NTs$ composite electrode that prepared at a current of 200 $mA.cm^{-2}$, and the electrode also exhibited excellent electrochemical stability.

Perovskite oxides as transparent semiconductors: a review

He Haiying,Yang Zhihao,Xu Yonghang,Smith Andrew T.,Yang Guangguang,Sun Luyi 나노기술연구협의회 2020 Nano Convergence Vol.7 No.32

Traditional transparent conducting oxides (TCOs) have been widely used for various optoelectronic applications, but have the trade-off between conductivity and transmittance. Recently, perovskite oxides, with structural and chemical stability, have exhibited excellent physical properties as new TCOs. We focus on ­SrVO 3 -based perovskites with a high carrier concentration and ­BaSnO 3 -based perovskites with a high mobility for n-type TCOs. In addition, p-type perovskites are discussed, which can serve as potential future options to couple with n-type perovskites to design full perovskite based devices.

Iron Overload and the Risk of Diabetes in the General Population: Results of the Chinese Health and Nutrition Survey Cohort Study

He Gao,Jinying Yang,Wenfei Pan,Min Yang 대한당뇨병학회 2022 Diabetes and Metabolism Journal Vol.46 No.2

Background: Recent studies have found that there are significant associations between body iron status and the development of diabetes. In the present study, we aimed to analyze the association among iron overload (IO), insulin resistance (IR), and diabetes in Chinese adults, and to explore the sex difference.Methods: Men and women (age >19 years) who participated in the Chinese Health and Nutrition Survey and did not have diabetes at baseline were followed between 2009 and 2015 (n=5,779). Over a mean of 6 years, 75 participants were diagnosed with incident diabetes. Logistic regression was used to assess the risk factors associated with IO. Cox proportional hazard regression was used to estimate the risk of incident diabetes and to determine whether the risk differed among subgroups. Causal mediation analysis (CMA) was used to explore the mechanism linking IO and diabetes.Results: According to sex-stratified multivariable-adjusted Cox proportional hazards regression, IO increased the risk of incident diabetes. Women with IO had a higher risk of diabetes than men. Subgroup analysis with respect to age showed that the association between IO and diabetes was stronger in older women and younger men (P<0.001). CMA showed that liver injury (alanine transaminase) and lipid metabolism abnormalities (triglyceride, apolipoprotein B) contributed to the association between IO and diabetes.Conclusion: IO is associated with diabetes and this association is sex-specific. IO may indirectly induce IR via liver injury and lipid metabolism abnormalities, resulting in diabetes.

An Easy Approach to Conversation

Yang,He-young 한국항공대학교 1982 論文集 Vol.20 No.-

In the given situations in Korea, it is extremely difficult for adults to learn to speak the sopken English accurately and naturally by the inductive method. For developing the ability to use the spoken English properly, adult students should be taught the fundamental principles in learning English which are described her by the deductive method. after the habit-formation of these principles, they would be aboe to learn English through the self-instruction. Practice must parallel theory inlearning the spoken language. The ideal thing, i it can be arranged, is to give the students and opportunity, one or two of them at a time, to meet and talk with a group of English-speaking people, and to let them listen and join in the conversation. But in our situations, it may be impossible for the students to have such a favorable opportunity either inside or outside the classroom. In teaching conversation to children the inductive method should be used if a teacher familiar with the technique is abailable. But it is a fallacy to suppose that adults can learn a foreign language in the same way as children do, unless they learn it in the country where it is spoken. Most adult students find the inductive method unsatisfying and are not content to wait for the rules to emerge fro the particular instances. Most of them probably know that rules of grammar and syntax are a common feature of all civilized languages. it is essential for the adult to learn something of the pattern of a new language, its grammatical and syntactical framework, and it is natural for him to learn a language deductively since in any language there are rules to learn. He is sure that he is saving time by learning rules from te start instead of deriving a knowledge of them inductivel. Therefore, they should deductively learn the spoken English thourhg havit forming practice. The following are intended to suggest ways in wyich the spoken language can be learned easily ad put to practical use.

OPTIMAL ERROR ESTIMATE OF A DECOUPLED CONSERVATIVE LOCAL DISCONTINUOUS GALERKIN METHOD FOR THE KLEIN-GORDON-SCHRÖDINGER EQUATIONS

HE YANG 한국산업응용수학회 2020 Journal of the Korean Society for Industrial and A Vol.24 No.1

In this paper, we propose a decoupled local discontinuous Galerkin method for solving the Klein-Gordon-Schr¨odinger (KGS) equations. The KGS equations is a model of the Yukawa interaction of complex scalar nucleons and real scalar mesons. The advantage of our scheme is that the computation of the nucleon and meson field is fully decoupled, so that it is especially suitable for parallel computing. We present the conservation property of our fully discrete scheme, including the energy and Hamiltonian conservation, and establish the optimal error estimate.

The Vocabulary of Informal English

Yang,He-young 한국항공대학교 1981 論文集 Vol.18 No.-