• Journal of Nutrition and Health
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• 제3권3호
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• pp.149-159
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• 1970

This study is to investigate the status of anemia, especially iron deficiency anemia among pre-school children in rural area in Korea. The survey was conducted in Sang-dae Ri, Yusong Myon, Daedok Gun, Chung Chong Nam-Do from July 30 th to August 12th, 1968. The measurements were done of height, weight, hematologist and biochemical levels on ninety-two pre-school children, 47 male, and 45 female, one to six years of age. Hemoglobin was determined by the method of cyanmethemoglobin and hematocrit by micro hematocrit centrifuge. The determination of serum iron, iron-binding capacity was done by the method of Ramsay using bathophenanthroline and the serum albumin was determined by Biuret Reaction. The results of this study are as follows: 1) 54.4 percent of the pre-school children weighed less than 90 percent of the Korean General Standard Weight level. 2) The average hemoglobin level was $11.0{\pm}1.57gm/100ml$, 38.0 percent of the children were anemic with less than 1.0gm/100ml. Of the anemic children 60 percent were below the Korean General Standard Weight level. 3) 27.5 percent of the pre-school children were found to have below 32 percent of a hematocrit values and 28.0 percent showed less than 33 percent in M.C.H.C. These results showed that the incidence of hypochromic anemia in these pre-school children was high. 4) 37.9 percent of these children had a serum iron level less than $50{\mu}g/100ml\;and\;31.0\;percent\;had\;a\;TIBC\;above\;400{\mu}g$ while 48.3 percent showed a transferrin saturation lower than 15 percent. On the basis of these findings, it is concluded than the cause of this anemia was iron deficiency. 5) In this group there was a little evidence of low total serum protein levels. However, 10.4 percent of the children had a deficient serum albumin level, below 2.80 gm/100ml while 51.7 percent had a low level, less than 3.50gm/100ml, and 34.5 percent of the children had a low level of TIBC, less than $350{\mu}g/100ml$, and considering these facts, it is suggested that some of the anemias have a multiple causes through protein deficiency and repeated chronic infection apart from iron deficiency.

• BMB Reports
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• 제57권7호
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• pp.330-335
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• 2024

Arginine methylation, which is catalyzed by protein arginine methyltransferases (Prmts), is known to play a key role in various biological processes. However, the function of Prmts in osteogenic differentiation of mesenchymal stem cells (MSCs) has not been clearly understood. In the current study, we attempted to elucidate a positive role of Prmt7 in osteogenic differentiation. Prmt7-depleted C3H/10T1/2 cells or bone marrow mesenchymal stem cells (BMSCs) showed the attenuated expression of osteogenic specific genes and Alizarin red staining compared to the wild-type cells. Furthermore, we found that Prmt7 deficiency reduced the activation of bone morphogenetic protein (BMP) signaling cascade, which is essential for the regulation of cell fate commitment and osteogenesis. Taken together, our data indicate that Prmt7 plays important regulatory roles in osteogenic differentiation.

• 한국초지조사료학회지
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• 제21권2호
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• pp.81-88
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• 2001

To investigate C and N metabolisms in response to potassium-deficient stress during regrowth of Italian ryegrass(Lolium multiflorum L.), C and N metabolites were analyzed at day 0 (cutting date), 6, 12 and 24 days after defoliation. K-sufficient (control, +K) and K-absent (-K) nutrition solutions were applied from 7 days before defoliation, and continued for one cycle of 24 days-regrowth period. During 24 days of regrowth dry matter of regrowing shoots and remaining tissues were not significantly different between +K and -K treatment. In remaining stubble, all C compounds in both +K and -K treatment largely decreased (69% to 84% of the initial level) during the first 6 days of regrowth, and then rapidly recovered. The decline of soluble sugars and fructan in roots for the first 6 days much less in the -K medium. Amino acids, soluble and insoluble proteins in stubble also feel down during the first 6 days, thereafter actively replenished in both +K and -K treatment. The decline of nitrate in stubble prolonged to 12 days of regrowth. Initial amounts of all N compounds in roots were significantly lower in the -K medium. Higher accumulation of amino acids and soluble protein in roots in the -K medium was observed after 12 days of regrowth. In regrowing shoots, 3 all carbohydrates increased with a very similar pattern for both treatments. Nitrate was not significantly different between two treatments. Depress of soluble protein accumulation in -K medium was noteworthy after 12 days of regrowth. These results indicated that an active utilization of organic reserves occurred to support regrowth even under K deficient condition with a similar extent with K sufficient condition.

• 한국양식학회지
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• 제11권3호
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• pp.285-294
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• 1998

When Cochlodinium polykrikoides came into the culture tanks through influent cultivated water during the red tides, hundred thousands of commercial flounders were concomitantly killed and many culturists suffered from a great deal of financial loss in the east coast of Korea. It is charactrized by high sinking rate after sunset and the formatino of clump which results in oxygen deficiency by its respiration at tank bottom under condition. We investigated the efficacy of hydrogen peroxide and chlorine dioxide, known to form radicals, for extermination of red tide organism C. polykrikoides. When C. polykrikoides seawater with a density of 6,000 cells/$m\ell$ was treated with 14, 28 and $42mg/\ell$ of hydrogen peroxide, its survival rate was markedly decreased to 9.8, 0.8 and 0.3% respectively immediately after 6 hours of treatments whereas when it was treated with 1.5, 2.1 and $3.0mg/\ell$ chlorine dioxide, its survival rate showed 87.7, 81.3 and 80.1 and 80.1% respectively at the same treatment time. Hydrogen peroxide was the effective agent since it has scarcely injured the cultured olive flounder when exposed to the tested concentration range of $14~28mg/\ell$ with the extermination of almost3 C. polykrikoides during the experimental period of 5 days and has shown the oxygen increase of approximately $1.23mg/\ell$ 2 hours immediately after the flounder by C. polykrikoides in the land-based culture tank is assumed to be not by the toxicity of itself but by oxygen dificiency from the rapid respiration of dinoflagellate clump sunken to the tank bottom.

• 한국세라믹학회지
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• 제47권2호
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• pp.99-105
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• 2010

The electrical transport properties of mayenite ($Ca_{12}Al_{14}O_{33}$ or $12CaO{\cdot}7Al_2O_3$; mostly abbreviated as $C_{12}A_7$) can be controlled in a wide range by varying the oxygen deficiency: At high temperatures mayenite becomes either an oxygen solid electrolyte, a mixed ionic/electronic conductor or an inorganic electride with metal-like properties upon chemical reduction (removing oxygen). The underlying defect chemistry can be understood on the basis of a relatively simple model-despite the complex cage structure: A point defect model based on the assumption that the framework $[Ca_{12}Al_{14}O_{32}]^{2+}$ acts as a pseudo-donor describes well the high temperature transport properties. It accounts for the observed conductivity plateau at higher oxygen activities and also describes the experimentally observed oxygen activity dependence of the electronic conductivity with -1/4 slope at temperatures between 800 and $1000^{\circ}C$. Doping effects in mayenite are still not well explored, and we review briefly the existing data on doping by different elements. Hydration of mayenite plays a crucial role, as Mayenite is hygroscopic, which may be a major obstacle for technical applications.

• E2M - 전기 전자와 첨단 소재
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• 제9권1호
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• pp.18-23
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• 1996

The molding pressure is also one of the important parameters in the preparation of HTSC materials by the solid state reaction method. In the present study, changes in structural, electrical and microstructural proper-ties with the molding pressure in YiB $a_{2}$C $u_{3}$ $O_{70{\delta}}$ superconductors have been performed. The investigated molding pressures were 0.5*10$^{3}$ N/c $m^{2}$, 1*10$^{3}$ N/c $m^{2}$, 2*10$^{3}$ n/c $m^{2}$ and 4*10$^{3}$ N/c $m^{2}$. As the molding pressure increased, the anisotropy of the crystal structure decreased and the grains have been grown preferentially in a c-axis direction. Since the size of the grain becomes larger with the decrease of the porosity, denser textures are formed. The results indicated that the critical current density is improved resulting from the enhanced densification due to higher molding pressure. When the molding pressure was between 1*10$^{3}$ N/c $m^{2}$ and 2*10$^{3}$ N/c $m^{2}$, while it did not affect the oxygen deficiency and Tc, the increase of the molding pressure affects remarkably on grain size and densification of the $Y_{1}$B $a_{2}$C $u_{3}$ $O_{7-{\delta}}$. When the molding pressure is larger than 2*10$^{3}$ N/c $m^{2}$, electrical proper-ties are independent on the molding pressure..

• 동의생리병리학회지
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• 제25권5호
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• pp.759-764
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• 2011

Through analyzing the frequencies of medicinal herb combinations in the prescriptions of "wenrejingwei(溫熱經緯)", we could understand the characteristics of prescription composition and author's medical thoughts. So we conducted this study that analyze combination of 187 medicinal herbs in 113 prescriptions, and found meaningful combinations of 273. Among these, the most meaningful combinations are the one of 7 herbs, Glycyrrhiza uralensis Fischer, Zingiber Rhizoma, Ziziphus jujube Mille, Pinellia ternata Breitenbach, Panax ginseng C.A.Meyer, Cyprinus carpio, Coptis chineis Franch. These are the same medicinal herbs which consist of Banhasasim-tang(banxiaxiexin-tang). It means these combinations are effective in stuffiness caused by stomach deficiency. In conclusion, prescriptions of "wenrejingwei(溫熱經緯)" involve herbs mostly used to treat stuffiness caused by stomach deficiency, and this is the author's important one of medical view points.

• Journal of Microbiology
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• 제35권1호
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• pp.61-65
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• 1997

A novel strategy was developed for isolating suppressors from sporulation-deficient mutants. The mutation in the BCY1 gene, which codes for the regulatory subunit of cAMP-dependent protein kinase, when homozygous, results in diploids being meiosis and sporulation deficient. Two plasmids, YCp-MAT.alpha. and YEp-SPOT7-lacZ, were introduced into MAT.alpha. BCY1$\^$+/ or MAT.alpha. bcy1 haploid cells. The transformant of the BCY1$\^$+/ haploid cell produced .betha.-galactosidase under nutrient starvation, but the bcy1 transformant did not. Using this system, the mutagenesis experiment performed on the bcy1 transformant strain resulted in a number of sporulation mutants that produced .betha.-galactosidase under nutrient starvation. One complementation group, sob1, was identified from the isoalted suppressor mutants and characterized as a single recessive mutation by tetrad analysis. Genetic analysis revealed that the sob1 mutation suppressed the sporulation deficiency, the failure to arrest at the G1 phase of the cell cecle, and the sensitivity to heat or nitrogen starvation caused by the bcy1 mutation. However, the sob1 mutation did not suppress the sporulation deficiency of ime1 and of ime2 diploids. These results suggest that the sob1 mutation affects a gene which functions as a downstream regulator in both meiosis and cell cycle regulation.

• 동의생리병리학회지
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• 제36권1호
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• pp.7-10
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• 2022

Hwangryunagyo-tang (HT) is a herbal cocktail to treat insomnia induced by yin deficiency with effulgent fire. In the present study, the onset time and the duration time of sleep were measured 30 minutes after thiopental sodium injection. And c-fos immunohistochemistry was performed to find the activated nerve cells of the ventrolateral preoptic nucleus (VLPO) and tuberomammillary nucleus (TMN) sites in the brain. HT significantly increased the number of activated nerve cells in the sleep-inducing center (VLPO), whereas HT significantly decreased the number of activated nerve cells in the arousal center (TMN). It could be concluded that the HT shortened the onset time and increased the duration time for sleep induced by thiopental sodium. And it was confirmed that the mechanism acted by activating the sleep-inducing center (VLPO) and suppressing the arousal center (TMN) in the brain. The results are considered to be useful as scientific evidence HT can be used clinically for the treatment of insomnia caused by yin deficiency with effulgent fire.

• Journal of Nutrition and Health
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• 제40권7호
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• pp.616-623
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• 2007

칼슘과 마그네슘 등의 무기질 섭취는 순환기계 질병과 밀접한 관련성이 있는 것으로 보고되고 있다. 여성은 폐경 이후 에스트로겐의 분비가 감소하면서 혈중 지질이 상승하게 된다. 따라서 폐경과 칼슘의 지속적인 결핍으로 인해 폐경 후 여성은 심혈관질환의 고위험군으로 분류될 수 있다. 이에 본 연구에서는 폐경 후 여성에서 칼슘과 마그네슘의 섭취수준이 지질패턴의 개선에 미치는 영향을 알아보기 위하여 총 50마리의 흰쥐를 각 10마리씩, 난소절제-저칼슘군, 난소절제-적정칼슘군, 난소절제-저칼슘마그네슘보충군, 난소절제-적정칼슘마그네슘보충군, Sham 대조군으로 분류하여 12주간 사육한 후 혈중과 간조직 중 지질을 분석하였다. 그 결과 혈중 총콜레스테롤, 중성지질, HDL-콜레스테롤은 군간 유의한 차이를 보이지 않았으며, LDL-콜레스테롤은 난소절제군이 Sham 대조군에 비해 높았다 (p < 0.01). 난소절제-적정칼슘군의 AI (Atherogenic index), TPH(Total cholesterol/HDL-C)와 LPH (LDL-C/HDL-C)는 난소절제-저칼슘군에 비해 유의적으로 낮게 나타났으며 (각 p < 0.05), 난소절제-적정칼슘마그네슘보충군의 LDL, AI, TPH 수준은 난소절제-저칼슘군에 비해 유의적으로 낮았다.(각 P < 0.05). 간의 총 지질함량은 난소절제-적정칼슘군과 난소절제-적정칼슘마그네슘보충군이 난소절제-저칼슘마그네슘보충군에 비해 유의적으로 낮게 나타났고, 난소절제-저칼슘군과 난소절제-저칼슘마그네슘보충군의 간의 총 지질 함량은 Sham 대조군에 비해 유의적으로 높았다 (p < 0.01). 간조직 중 총콜레스테롤함량은 군간 유의한 차이가 없었다. 이상의 결과를 통하여 난소절제시 적정칼슘의 섭취가 혈중 AI와 TPH, LPH 및 간조직 중 총 지질함량을 감소시켜 칼슘결핍군에 비하여 심혈관질환의 위험을 낮추는 효과를 보였으며, 적정칼슘에 마그네슘의 보충이 실시되었을 때 칼슘결핍군보다 LDL-콜레스테롤, AI, TPH가 감소하는 효과를 보였다. 이러한 결과를 통하여 폐경 후 여성에서 심혈관 질환의 예방을 위해 칼슘의 적정한 섭취가 중요하며, 마그네슘 보충에 의한 심혈관질환에 대한 효과는 적정한 수준의 칼슘을 섭취할 때 나타나기 때문에 폐경 후 여성의 심혈관질환의 예방 및 관리차원에서 마그네슘의 보충은 칼슘섭취와의 관계를 반드시 고려하여야 할 것으로 사료된다.