• Journal of Embryo Transfer
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• v.16 no.2
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• pp.127-131
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• 2001

The Jeju horse has been raised for centuries in Jeju island. Recently, as the number of this indigenous horse has been dropped dramatically, this breed became Natural Monument #347 to conserve and multiply this endangered breed. To provide the basic information for AI, sexual activity and semen characteristics in Jeju horse were investigated. Jeju horse semen was collected using Missouri style artificial vagina from fertile stallion.\\`she number of mount per ejaculation was 2..3$\pm$1.8, and the ejaculation time was 27.0$\pm$12.5 seconds. The total volume and gel-free volume of semen was 47.8$\pm$26.7 ml and 42.7$\pm$27.4ml, respectively, and the concentration of sperm and the total number of spermatozoa per ejaculation was 200.7$\pm$112.9$\times$10$^{6}$ ml and 7.6$\pm$3.9$\times$10$^{9}$ ml, respectively. The percentage of motile sperm and the number of live spermatozoa per ejaculation was 75.0$\pm$18.2% and 6.1$\pm$3.4$\times$10$^{9}$ ml, respectively, and the pH of gel-free semen was 7.3$\pm$0.2. The total percentage of abnormal sperm was 31.5%, and the percentage of sperm with abnormal head, midpiece and tail was 9.5$\pm$11.7%, 7.0$\pm$4.0% and 15.0$\pm$15.0%, respectively.

• Proceedings of the KOR-BRONCHOESO Conference
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• 1979.05a
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• pp.8.1-8
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• 1979

Microsurgery in otolaryngological field have been used of otomicrosurgery for middle ear operation and recently tend to be used more frepuently for laryngeal surgery. The authors had analyzed 63 cases of laryngeal mass under microsurgery with Suspension Laryngoscope from August '74 to April '79. The results are as follows; 1) The total cases of Suspension Laryngoscope was 63 ; 34 cases (54%) were male and 29 cases (46%) were female. Sex ratio was 1.2 : 1. 2) Age distribution shows 20 cases (37%) in 3rd decide, 10 cases (15.9%) in 4th decade, and 9 cases (14.3%) in 2nd decade. 3) The site of operation was 61 cases (96.8%) from glottic and 2 cases (3.2%) from supraglottic region. 4) The site of glottic region was 24 cases (38.1%) from bilateral, 22 cases (34.9%) from Rt., and 15 cases (14.3%) from Lt. 5) Pathologic findings of biopsy was Laryngeal nodule in 30 cases (47.6%), Squamous cell carcinoma in 10 cases (15.9%), Laryngeal polyp in 8 cases(12.7%), Laryngeal Papilloma in 5 cases (7.9%), and Non-specific inflammation in 5 cases (7.9%).

• Proceedings of the IEEK Conference
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• 2001.06b
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• pp.169-172
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• 2001

We have investigated the mechanical deformation of carbon nanotube using TBMD(tight-binding molecular dynamics) simulation. We have studied four carbon nanotubes, armchair (6, 6), (7, 7), (8, 8), and (9, 9) carbon nanotubes whose length were same. As a result of study, we have known that the nanotube's yield force increases with incresing their diameter. It is similar between (6, 6) and (8, 8) CNT's force-strain curves. Also force-strain curve between (7,7) and (9, 9) CNTs are nearly same.

• Proceedings of the KOR-BRONCHOESO Conference
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• 1983.05a
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• pp.19.2-19
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• 1983

A Clinical and bacteriologcal observation was performed 128 cases of chronic otitis media who had taken middle ear surgery at Dept. of otolaryngology of St. Benedict Hospital during the period of Feb. 1981 to Feb. 1983. The following results were obtained. 1) Among total 128 cases, male were 60 cases (46.9%) and female were 68 cases (53.1 %) and age distribution showed 48 cases (37.5 %) in 3rd decade, 37 cases (28.9 %) in 2nd decade and 27 cases (21.1 %) in 4th decade. 2) Site distribution were 71 cases (55.5%) in right, 57 cases (44.5 %) in left. 3) Degree of preoperative hearing loss were 64 cases (50%) in moderate, 32 cases (25% ) in mild, 27 cases (21.1 %) in severe and 5 cases (3.9%) were normal. 4) Central perforation were observed in 65 cases (50.8 %), total perforation in 44 cases (34.4 %), attic perforation in 12 cases (9.4 %) and marginal perforation in 7 cases (5.4 %). 5) Pathologic changes of middle ear and mastoid antrum showed granulation in 81 cases (63.3 %), cholesteatoma in 47 cases (36.7%). 6) The route of approach were 123 cases (96.1%) in postauricular, 3 cases (2.3%) in transmeatal and 2 cases (1.6 %) in endaural. 7) Type of operation were 53 cases (41.4 %) in intact canal wall tympanoplasty with mastoidectomy, 42 cases (32.8 %) in tympanoplasty without mastoidectomy, 23 cases (18%) in modified radical mastoidectomy and 10 cases (7.8%) in radical mastoidectomy. 8) Type of anesthesia were 95 cases (74.2 %) by local anesthesia, 33 cases (25.8 %) were by general anesthesia. 9) Among 93 specimens of culture, proteus (31.2%), staphylococcus (28.7%), pseudomonas (23.7 %), streptococcus (7.5 %) and etc. (8.7%) in order of frequency.

• The Journal of Pediatrics of Korean Medicine
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• v.16 no.2
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• pp.129-141
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• 2002

The Purpose of this study was to investigate infancy patients who had visited Oriental Medicine Hospital, and so to consider a counterplan by oriental medicine. The study was composed of 101 new infancy patients who had visited Dongguk Kyeongju Oriental Medicine Hospital during 1 year from January 2001 to December 2001. The results were as follows : 1. Male children are 65(64.3%), female children are 36(35.6%), male to female ratio is 1.8: 1. 2. In age distribution, 1 month 5.9% ; 2 month 10.9%, 3 month 4.0%, 4 month 11.9%, 5 month 5.9%, 6 month 9.9%, 7 month 10.9%, 8 month 10.9%, 9 month 10.9%, 10 month 14.8%, 11 month 4.0%. 3. According to systematic division of the chief complaint, respiratory diseases are 37.6%, digestive diseases are 25.7%, nervous diseases are 21.8%, urogenital diseases are 1.0%, musculoskeletal diseases are 1.0%, dermatologic diseases are 7.9%, infirmity diseases are 3.0%. 4. In treatment, herb-medication is 86.1%, consultation is 7.9%, acupuncture is 17.8%, moxibution is 2.0%, venesection is 14.8%, aromatherapy is 4.9%, chimsband is 16.8%.

• Journal of the Korean Applied Science and Technology
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• v.30 no.2
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• pp.272-279
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• 2013

The fermented puer tea leaves were high concentrated extracted with 50% ethanolic solution in this study. Also, evaluating the anti-oxidative activity and anti-aging effect of this extract, we expected to apply the cosmetic industry. The yield of fermented puer tea extract was 17.9%. The total polyphenol content was 37.5%, tannin content was 7.5%, polysaccharide was 17.9%, unknown compound was 22%, and water content was 8%. Anti-oxidative activity (in-vitro) of fermented puer tea extract by DPPH method was $33.7{\pm}1.8%$ in 30mg/mL, $39.4{\pm}2.2%$ in 50mg/mL respectively. Therefore, we could know that anti-oxidative activity of fermented puer tea extract was effect higher than tocopheryl acetate and greentea extract. The collagen synthesis activity (in-vitro) of fermented puer tea extract was increased with $102.9{\pm}9.9%$ in 1 mg/mL, $111.5{\pm}9.9%$ in 5 mg/mL, $122.7{\pm}12.2%$ in 10 mg/mL, $131.5{\pm}13.7%$ in 30 mg/mL (*p-value£0.05, n=3). Skin moisturizing activity of fermented puer tea extract after application 8 hours was increased 38.5% higher than control samples both tocopheryl acetate and greentea extract. Total moisturizing effect was increased about 32.7% compared to before treatment. Fermented puer tea extract of this study can be applied to the skin care cosmetics industry.

• Korean Journal of Agricultural Science
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• v.32 no.1
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• pp.63-70
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• 2005

The extracts in n-hexane layer from Lespedezea cuneata G. Don exelled at sexual activity according to in vitro experiment using biopsy of rabbit corpus cavernosum to investigate effects on sexual function. The extracts were injected into 9 samples at $10{\mu}l$. The lowest relaxation was showed at sample C, $4.8{\pm}1.4%$ and the highest relaxation was showed at sample A, $20.2{\pm}6.0%$. The relaxation by every sample, except sample C and G-1, were higher than by $10^{-7}M$ ACh, $7.8{\pm}5.1%$, and their effects were above 10%. Also, the extracts were injected into 9 samples at $15{\mu}l$. The lowest relaxation was showed at sample C, $15.4{\pm}9.7%$ and the highest relaxation was showed at sample J, $54.8{\pm}9.7%$. The relaxation by sample A and D was as much as by $10^{-6}M$ ACh, $28.0{\pm}20.1%$. The relaxation by sample H was $41.9{\pm}7.3%$. The relaxation by sample J was $54.8{\pm}9.7%$ and it was higher than by $10^{-5}M$ ACh, $53.9{\pm}25.9%$. Also, the extracts were injected into 9 samples at $20{\mu}l$. The lowest relaxation was showed at sample E, $28.9{\pm}0.6%$ and it was a little higher than by $10^{-6}M$ ACh. The relaxation by sample G was as much as by $10^{-5}M$ ACh. The two higher relaxation were showed at sample H, $99.4{\pm}16.0%$ and J, $95.7{\pm}7.2%$, and their relaxation against contraction reaction by PhE were near 100%. Experiment by sample I was not performed for lack of sample amount.

• Journal of the Korean Institute of Electrical and Electronic Material Engineers
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• v.18 no.6
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• pp.538-542
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• 2005

The structural and microwave dielectric properties of $0.7Mg_4Ta_2O_9-0.3SrTiO_3$ ceramics with sintering temperature were investigated. All the sample of the $0.7Mg_4Ta_2O_9-0.3SrTiO_3$ ceramics were prepared by conventional miked oxide method and the sintering temperature was $1425\~1500^{\circ}C$. The hexagonal phase of $Mg_4Ta_2O_9$ and the cubic phase of $SrTiO_3$ were coexisted. The porosity of $0.7Mg_4Ta_2O_9-0.3SrTiO_3$ ceramics were reduced with increasing sintering temperature. In the case of $0.7Mg_4Ta_2O_9-0.3SrTiO_3$ ceramics sintered at $1475^{\circ}C$, dielectric constant, quality factor and temperature coefficient of resonant frequency were 14.51, 82,596 GHz and $-3.14\;ppm/^{\circ}C$, respectively.

• Journal of Species Research
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• v.9 no.4
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• pp.448-454
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• 2020

Nine free-living heterotrophic flagellates were cultured from marine intertidal sediments and freshwater sediments from Korea. These species are described with uninterpreted records based on light microscopy of living cells and reported taxonomically for the first time from Korea. Diagnostics of these species are as follows; Notosolenus hemicircularis: 9-11.8 ㎛ long with flagellar reservoir, ventrally flattened and dorsally convex with hyaline semicircular collar around short anterior neck, and 8 ridges on cell surface. Thecamonas tranhens: 4.5-7.1 ㎛ long, plastic with proboscis comprising an anterior flagellum surrounded by membranous sleeve. Bodomorpha minima: 4.5-7.0 ㎛ long, rigid with small rostrum in anterior end and active anterior flagellum. Cercomonas hiberna: 5.6-10.9 ㎛ long, very plastic with pseudopodia, cytoplasmic strand and 1 or 2 contractile vacuoles. Cercomonas pellucida: 7.5-13 ㎛ long, plastic with pseudopodia, cytoplasmic strand and single contractile vacuole. With nucleus closely connected to basal bodies. Eocercomonas echina: 4.7-6.5 ㎛ long, plastic with pseudopodia, cytoplasmic strand and 1 or 2 contractile vacuoles. Paracercomonas astra: 5.7-7.3 ㎛ long, moderately metabolic with pseudopodia, cytoplasmic strand and 1 or 2 contractile vacuoles. Paracercomonas minima: 5-9 ㎛ long, metabolic with pseudopodia, cytoplasmic strand and single contractile vacuole. Paracercomonas producta: 6.1-9.9 ㎛ long, very metabolic with pseudopodia, long cytoplasmic strand and single contractile vacuole.

• Korean Journal of Materials Research
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• v.26 no.11
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• pp.628-634
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• 2016

The cold rolling workability and mechanical properties of two new alloys, designed and cast Al-5.5Mg-2.9Si and Al-7Mg-0.9Zn alloys, were investigated in detail. The two alloy sheets of 4 mm thickness, 30 mm width and 100 mm length were reduced to a thickness of 1 mm by multi-pass rolling at ambient temperature. The rolling workability was better for the Al-7Mg-0.9Zn alloy than for the Al-5.5Mg-2.9Si alloy; in case of the former alloy, edge cracks began to occur at 50% rolling reduction, and their number and length increased with rolling reduction; however, in the latter alloy, the sheets did not have any cracks even at higher rolling reduction. The mechanical properties of tensile strength and elongation were also better in the Al-7Mg-0.9Zn alloy than in Al-5.5Mg-2.9Si alloy. Work hardening ability after cold rolling was also higher in the Al-7Mg-0.9Zn alloy than in the Al-5.5Mg-2.9Si alloy. At the same time, the texture development was very similar for both alloys; typical rolling texture developed in both alloys. These differences in the two alloys can primarily be explained by the existence of precipitates of $Mg_2Si$. It is concluded that the Al-7Mg-0.9Zn alloy is better than the Al-5.5Mg-2.9Si alloy in terms of mechanical properties.