• Journal of the Korean Magnetics Society
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• v.6 no.1
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• pp.7-14
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• 1996

According to demands of high density and wide band magnetic recording systems, a composite MIG head was developed. This head has the sufficient performance for use of a SD VCR : its characteristics are a good recoding performance, a low rubbing noise, a good frequency dependence of efficiency, and a good compatibility with ME tape. In a SD VCR system, the C/N value of a composite MIG head at 20.92MHz was 51 dB.

• Microbiology and Biotechnology Letters
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• v.38 no.3
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• pp.335-339
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• 2010

A diesel-degrading bacterium, Gordonia sp. SD8, was isolated from soil contaminated with petroleum, and its diesel degradation was characterized in a soil as well as a liquid culture system. SD8 could grow in the mineral salt medium supplemented with diesel as a sole carbon and energy source. The maximum specific growth rate ($0.67{\pm}0.05\;d^{-1}$) and diesel degradation rate ($1,727{\pm}145$ mg-TPH $L^{-1}\;d^{-1}$) of SD8 showed at 20,000 mg-TPH $L^{-1}$ and $30^{\circ}C$, and then this bacterium could degrade high strength of diesel of 40,000 mg-TPH $L^{-1}$. The residual diesel concentration in the inoculated soil with SD8 was 3,724 mg-TPH kg-dry $soil^{-1}$ after 17 days, whereas the diesel concentration in the non-inoculated soil was $8,150{\pm}755$ mg-TPH kg-dry $soil^{-1}$. These results indicate that Gordonia sp. SD8 can serve as a promising microbial resource for the bioremediaion of contaminated soil with petroleum hydrocarbons including diesel.

• Korean Journal of Community Nutrition
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• v.4 no.3
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• pp.421-430
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• 1999

A neural network system was applied in order to analyze the nutritional and other factors influencing chronic diseases. Five different nutrition evaluation methods including SD Score, %RDA, NAR INQ and %RDA-SD Score were utilized to facilitate nutrient data for the system. Observing top three chronic disease prediction ratio, WHR using SD Score was the most frequently quoted factor revealing the highest predication rate as 62.0%. Other high prediction rates using other data processing methods are as follows. Prediction rate with %RDA, NAR, INQ and %RDA-SD Score were 58.5%(diabetes), 53.5%(hyperlipidemia), 51.6%(diabetes), and 58.0%(diabetes)respectively. Higher prediction rate was observed using either NAR or INQ for obesity as 51.7% and 50.9% compared to the previous result using SD Score. After reviewing appearance rate for all chronic disease and for various data processing method used, it was found that iron and vitamin C were the most frequently cited factors resulting in high prediction rate.

• The Journal of Internal Korean Medicine
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• v.27 no.1
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• pp.72-83
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• 2006

Objective : This study was designed to identify lipid protection formation in stratum corneum and anti-inflammatory effects of Sopungdojeok-tang(SD) on atopic dermatitis(AD). Materials and Methods : In Vivo, SD extract was orally administered to BALB/c mice at $2.5m{\ell}/kg/day$ for 2 days after 5% sodium dodecyl sulfate evoked atopic dermatitis in abdominal skin. Morphological changes were observed by immunohistochemical stain using monoclonal antibodies(BrdU, ceramide, MIP-2, $NF-{\kappa}B$ p50, IL-4, and STAT6) and TUNEL method. In vitro, the alterations of IL-4 mRNA expression were detected by RT-PCT in SD extract treated EL4 cells after phorbol-12-myristate-13-acetate and 4-tert-Octylphenol induce Th2 skewed condition. Results : SD is used in Oriental Medicine for its potential curative for atopic dermatitis. In this study, we have investigated the anti-inflammatory and lipid lamella repair effects of SD were investigated. SD decreased the number of eosinophil in atopic dermatitis induced mice. In the histological properties, the hyperplasia, edema, infiltration of lymphocytes, damage of intercellular space of stratum corneum, BrdU positive reacted cells in stratum basal, and degranulated mast cells and capillaries in dermal papillae decreased in mice with SD. Treatment of SD also decreased MIP-2, STAT6 and IL-4 in dermal papillae. The IL-4 mRNA expression decreased in a dose-dependant manner in SD treated EL4 cells. In addition, decrease of $NF-{\kappa}B$ p50 and increase of apoptotic cells in dermis were observed in SD treated mice. These data suggest that SD may beneficial for atopic dermatitis. Conclusions : These data suggest that SD is beneficial in treatment of atopic dermatitis, and that SD provides lipid protection in stratum corneum and anti-inflammatory effects on atopic dermatitis.

• Korean Journal of Microbiology
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• v.29 no.2
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• pp.80-84
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• 1991

We cloned and expressed hepatitis B viral core antigen (HBcAg) gene in E. coli using $P_{L}$ promoter system. For optimal expression of the gene, we undertook the studies on the effects of the distance between Shine-Dalgarno (SD) sequence and start codon, copy number of repressor gene, induction temperature, and the stability of the core antigen. The results demonstrated that the induction at 37.deg.C was more efficient than at 42.deg.C, and the 11 base pairs (bp) distance between SD sequence and start codon of HBcAg gene was more efficient than the 15 bp distance in E. coli. The copy number of cI857 repressor gene did not influence on the expression of HBcAg, and the expression level of HBcAg in mutant type (low protease activity) and wild type strains was almost the same. The produced core antigen appeared to be HBcAg not HBeAg judged by two different radioimmunoassat (RIA) kits. This result suggested that the antigen was stable in E. coli.i.

• Parasites, Hosts and Diseases
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• v.30 no.4
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• pp.283-288
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• 1992

To observe the transmission patterns of karyotype of Pneumocystis carinii (Pc) by rat colonies, three strains of rats, Sprague-Dawlcy(SD), Wistar(W) and Fisher (F) from various animal vendors, were suppressed of their immunity by injection of methyl prednisolone. They were kept for 5 to 13 weeks in 3 different animal rooms, A, B, and C. The purified organisms were prepared in low melting point agarose gel by embedded Iysis method for pulsed field gel electrophoresis. Field inversion gel electrophoresis showed 2 patterns of the kart·otype of Pc. The rooms A and C contained SD rats from the source p, and also the room A was used for F and W rats. However, Pc from all of the SD and F rats in the room A showed same karyotypes, the pattern I. The SD rats from difFerent vendors, M and 5, were reared in the room B, and shared the same Pc karyotypes, the pattern II . The rats of W strain were from the vendor M, and immune-suppressed in the animal room A. Five weeks after the expe- riment, the Pc showed the karyotype pattern II but the pattern became mixed with the type I after 7 to 8 weeks. The Bindings revealed that the animals born and reared in the same animal quarter harbored Pc with same karyotypes. If the animals were kept under immune-suppression in the same room with heavily infected hosts, they could be infected by Pc from their neighbors. The present experimental findings suggest that Pc is transmitted among rats through the air.

• Korean Journal of Materials Research
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• v.27 no.9
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• pp.477-483
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• 2017

This present study deals with the microstructure and tensile properties of 600 MPa-grade high strength and seismic resistant reinforcing steels. The high strength reinforcing steel (SD 600) was fabricated by Tempcore processing, while the seismic resistant reinforcing steel (SD 600S) was air-cooled after hot-rolling treatment. The microstructure analysis results showed that the SD 600 steel specimen consisted of a tempered martensite and ferrite-pearlite structure after Tempcore processing, while the SD 600S steel specimen had a fully ferrite-pearlite structure. The room-temperature tensile test results indicate that, because of the enhanced solid solution and precipitation strengthening caused by relatively higher contents of C, Mn, Si and V in the SD 600S steel specimen, this specimen, with fully ferrite-pearlite structure, had yield and tensile strengths higher than those of the SD 600 specimen. On the other hand, the hardness of the SD 600 and SD 600S steel specimens changed in different ways according to location, dependent on the microstructure, ferrite grain size, and volume fraction.

• Proceedings of the Korea Concrete Institute Conference
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• 2008.11a
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• pp.381-384
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• 2008

The artificial lightweight aggregate was manufactured using stone-dust(SD) and bottom ash(BA) from crushed aggregate manufacture process and thermoelectric power plant respectively. The properties of artificial lightweight aggregate according to mixing ratio of SD and BA was that the density was decreased and the absorption was increased with increasing BA content, because bottom ash was contained many unburned carbon and $Fe_2O_3$ which generates gas by oxidation during a sintering process. The appropriate mixing ratio of SD and BA was estimated at about 5:5. The properties of artificial lightweight aggregate according to addition flux admixture was that it had lower density with increasing of $Na_2SO_4$ content. In this study, we could developed the artificial lightweight aggregate as the bulk density was $1.52g/cm^3$ and water absorption 7.3% under the condition that mixing ratio of SD:BA was 5:5, $Na_2SO_4$, $Fe_2O_3$ 1%, sintering temperature $1,150^{\circ}C$ and sintering time 15mins.

• Food Science and Preservation
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• v.20 no.1
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• pp.1-6
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• 2013

In this study, the effect of Curcuma longa L. on obesity and insulin resistance was investigated in animals fed a moderate high fat diet. The animals used in this study were normal weight Spargue-Dawley (SD) rats and type 2 diabetic obese db/db mice. Accumulation of abdominal adipose tissue and weight gain were inhibited in the animals fed the C. longa extract. C. longa decreased fasting insulin and HOMA-IR in the SD rats, and effectively decreased blood glucose and hemoglobin A1c in db/db mice. C. longa decreased serum free fatty acid (FFA) level in the SD rats. FFA in db/db mice fed C. longa tended to decrease. C. longa significantly decreased serum triglyceride level. Our results collectively represent that C. longa prevented fat accumulation and insulin resistance in both normal weight SD rats and type 2 diabetic obese db/db mice fed a moderate high fat diet.

• Journal of International Academy of Physical Therapy Research
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• v.7 no.1
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• pp.908-914
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• 2016

The purpose of this study is to explore the effects of mobilization of C0-C1 and C7-T1 applied to asymptomatic individuals with reduced upper cervical rotation during the FRT. Design: parallel randomized controlled trial. 48 subjects(38.52 years${\pm}15.13$) with C1-C2 rotation hypomobility in TFR joined the study and were randomized into three groups(C0, C7, control group). FRT in both directions was measured before and after the intervention. C0 intervention consisted of a dorsal translatoric mobilization of C0-C1 in the cervical neutral position. C7 intervention consisted of a ventral cranial translatoric mobilization of C7-T1 in neutral position and the control group maintained a supine position. C0 group experienced a FRT ROM to the restricted side increase of $17.64^{\circ}$(SD=4.55), that was significantly greater (P<0.001) than $5.95^{\circ}$(SD=4.81) of the C7 group and $2.45^{\circ}$(SD=5.05) of the control group. The results showed that a dorsal translatoric mobilization of C0-C1 in neutral position restored the physiological FRT mobility in subjects with C1-C2 hypomobility and experienced statistical significant improvement in FRT as compared to a C7-T1 translatoric mobilization and a control group. (Level of evidence: 1b).