Oocyte freezing has become a prevalent source for related reproductive technologies. This study was carried out to evaluate viability of post-thawed bovine oocyte injected DTT-treated sperm following by two different activation stimuli (Group 1, 5 M ionomycin, 5 min + CR1aa, 3 h . 1.9 mM dimetylaminopurine (DMP), 3 h; group 2, ionomycin + 10 $\mu\textrm{g}$/$m\ell$ cycloheximide(CHX), 5h). The techniques of ultra-rapid freezing used in this study were essentially similar to those of described by Vajta et al (Theriogenology 1999; 52:939-948), Denuded oocytes at 22 h of culture were exposed to cryoprotectant (3.2 M Ethylene glycol, 2.36 M DMSO, 0.6 M sucrose), and followed by freezing in electron microscopic grid. After thawing the oocytes were transferred back into the drop of maturation medium and cultured for additional 2 h before being subjected to ICSI. All eggs were then cultured in CRlaa medium, and transferred into M199+10% FCS on day 4. The culture was maintained until day 9. In Experiment 1, frozen-ICSI eggs were compared on development into blastocyst to those of unfrozen and IVF control. Those eggs were activated with the method of group 2. A higher proportion of unfrozen-ICSI and IVF eggs developed into cleavage and blastocysts than of frozen-ICSI eggs (65% and 13%; 71% and 23% vs. 39% and 8%; P<0.05). In Experiment 2, development and ploidy of embryos made from group 1 were compared to those from group 2. Between groups there did not differ on the rates of development, however, chromosomal abnormality in group 1 was significantly higher than in group 2 (49% vs. 30%; P<0.05). The present result suggests that frozen bovine oocytes can be used for ICSI.
Sexual dysfunction (SD) is a health problem which occurs during any phase of the sexual response cycle that keeps the individual or couple from experiencing satisfaction from the sexual activity. SD covers a wide variety of symptoms like in men, erectile dysfunction and premature or delayed ejaculation, in women, spasms of the vagina and pain with sexual intercourse, in both sexes, sexual desire and response. And pharmacopuncture, i.e. injection of subclinical doses of drugs, mostly herb medicine, in acupoints, has been adopted with successful results. This case report showed the effect of bee venom on SD. A 51-year-old male patient with SD, who had a past history of taking Western medication to treat his SD and who had previously undergone surgery on his lower back due to a herniated disc, received treatments using pharmacopuncture of sweet bee venom (SBV) at Gwanwon (CV4), Hoeeum (CV1), Sinsu (BL23), and Gihaesu (BL24) for 20 days. Objectively, the patient showed improvement on most items on the International Index for Erectile Dysfunction (IIEF) like 28 to 29 out of perfect score 30 for erectile function, 10 to 10 out of perfect score 10 for orgasmic function, 6 to 8 out of perfect score 10 for sexual desire, 10 to 13 out of perfect score 15 for satisfaction with intercourse, and 6 to 8 out of perfect score 10 for overall satisfaction; subjectively, his words, the tone of his voice and the look of confidence in his eyes all indicated improvement. Among the variety of effects of SBV pharmacopuncture, urogenital problems such as SD may be health problems that pharmacopuncture can treat effectively.
Proceedings of the Korean Society for Technology of Plasticity Conference
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2006.05a
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pp.239-242
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2006
LCD-BLU (Liquid Crystal Display - Back Light Unit) is one of kernel parts of LCD unit and it consists of several optical sheets(such as prism, diffuser and protector sheets), LGP (Light Guiding Plate), light source (CCFL or LED) and mold frame. The LGP of LCD-BLU is usually manufactured by forming numerous dots with $50{\sim}200$ um in diameter on it by etching process. But the surface of the etched dots of LGP is very rough due to the characteristics of the etching process during the mold fabrication, so that its light loss is high along with the dispersion of light into the surface. Accordingly, there is a limit in raising the luminance of LCD-BLU. In order to overcome the limit of current etched dot patterned LGP, optical pattern design with 50um micro-lens was applied in the present study. The micro-lens pattern fabricated by modified LiGA with thermal reflow process was applied to the optical design of LGP. The attention was paid to the effects of different aspect ratio (i.e. $0.2{\sim}0.5$) of optical pattern conditions to the brightness distribution of BLU with micro-lens patterned LGP. Finally, high aspect ratio micro-lens patterned LGP showed superior results to the one made by low aspect ratio in average luminance.
The purpose of this study was to clarify the effect of light emitting diode (LED) irradiation on healing of impaired wound and alteration of mast cells in experimental diabetic rats. Twenty-four male Sprague-Dawley rats were divided into four groups: excision (Ex), excision-LED irradiation (Ex-LED), diabetes + excision (DM) and diabetes + excision + LED irradiation (DM-LED). Diabetes was induced in rats by streptozotocin (STZ) injection (70 mg/kg, single dose) and 6 mm punch excision wounds were created on the back after shaving hair. The LED-irradiated rats were treated to a daily dose of $5\;J/cm^2$ LED (630 nm) light for 11 days after surgery, and were killed at day 1, 3, 7 and 11. The lesion and adjacent skin tissues were excised, fixed with 10% buffered formalin and embedded with paraffin. For evaluation of wound healing, hematoxylin-eosin (HE) and Masson trichrome staining were performed. Mast cells (MCs) were stained with toluidine blue (pH 0.5) and quantified using a computerized image analysis system. The proliferation activity of keratinocyte in skin tissues was analyzed on sections immunostained with proliferative cell nuclear antigen (PCNA). The results showed that wound healing rate, collagen density and neo-epidermis length, number of PCNA-positive cells, fibroblasts and mast cells were significantly higher in the LED-irradiated rats than in the DM and Ex rats throughout the periods of experiment. Exceptionally, the number of MCs was significantly lower at day 11 compared with day 7 after surgery in the all groups. These findings suggest that the LED irradiation may promote the tissue repair process by accelerating keratinocyte and fibroblast proliferation and collagen production in normal rats as well as in diabetic rats, and MCs may play an important role at an early stage of skin wound healing in normal and diabetic rats.
Purpose: Currently, soft tissue filler products based on hyaluronic acid are widely used. They are safe, effective, and convenient to use compared with bovine collagens. However, all commercially available hyaluronic acid based fillers in Korea are imported ones. The purpose of this study is to evaluate efficacy of a new hyaluronic acid filler (HyaFilia; CHA bio&Diostech Co., Seoul), which has been recently developed in Korea. Methods: Three kinds of soft tissue fillers, including Restylane (Q-Med, Uppsala, Sweden), HyaFilia (CHA bio & Diostech Co., Seoul), Juvederm (Allergan, CA, USA), were injected subdermally into the back of hairless mice at six sites. The 2 cephalic sites composed Restylane groups, the 2 middle sites HyaFilia groups, and the 2 caudal sites Juvederm groups. Six hairless mice were included in the study, therefore, a total of 12 injections per group were performed. After 16 weeks after injection, the nodular swellings that resulted from the injections were excised wide enough to include skin beyond the swelling points down to the panniculus carnosus layer using 8mm punches. Volumes and weights were measured using a stereoimage optical topometer system and a weighting machine. Histologic comparisons were also carried out. Results: The mean volumes of the Restylane, HyaFilia and Juvederm groups were $3698{\times}103$, $4820{\times}103$, and $1435{\times}103$ PI, respectively. The mean weights of the Restylane, HyaFilia and Juvederm groups were 36.08, 37.83, and 24.66 mg, respectively. Histologic examination between the 3 groups showed no significant difference in tissue compositions and inflammatory reactions. Conclusion: The results of this study shows that HyaFilia is superior to Restylane and Juvederm in longavity of filling effect. Therefore, HyaFilia may be an effective replacement for the imported materials including Restylane and Juvederm.
Ha, Sang-Woo;Ju, Chang-Il;Kim, Seok-Won;Lee, Seung-Myung;Kim, Yong-Hyun;Kim, Hyeun-Sung
Journal of Korean Neurosurgical Society
/
v.51
no.4
/
pp.208-214
/
2012
Objective : Discal cyst is rare and causes indistinguishable symptoms from lumbar disc herniation. The clinical manifestations and pathological features of discal cyst have not yet been completely known. Discal cyst has been treated with surgery or with direct intervention such as computed tomography (CT) guided aspiration and steroid injection. The purpose of this study is to evaluate the safety and efficacy of the percutaneous endoscopic surgery for lumbar discal cyst over at least 6 months follow-up. Methods: All 8 cases of discal cyst with radiculopathy were treated by percutaneous endoscopic surgery by transforaminal approach. The involved levels include L5-S1 in 1 patient, L3-4 in 2, and L4-5 in 5. The preoperative magnetic resonance imaging and 3-dimensional CT with discogram images in all cases showed a connection between the cyst and the involved intervertebral disc. Over a 6-months period, self-reported measures were assessed using an outcome questionaire that incorporated total back-related medical resource utilization and improvement of leg pain [visual analogue scale (VAS) and Macnab's criteria]. Results : All 8 patients underwent endoscopic excision of the cyst with additional partial discectomy. Seven patients obtained immediate relief of symptoms after removal of the cyst by endoscopic approach. There were no recurrent lesions during follow-up period. The mean preoperative VAS for leg pain was $8.25{\pm}0.5$. At the last examination followed longer than 6 month, the mean VAS for leg pain was $2.25{\pm}2.21$. According to MacNab' criteria, 4 patients (50%) had excellent results, 3 patients (37.5%) had good results; thus, satisfactory results were achieved in 7 patients (87.5%). However, one case had unsatisfactory result with persistent leg pain and another paresthesia. Conclusion : The radicular symptoms were remarkably improved in most patients immediately after percutaneous endoscopic cystectomy by transforaminal approach.
Kim, Ji-Hoon;Seo, Jae-Won;Kang, Hye-Seung;Kim, Jeong-Kyu;Kim, Jeong-Won;Lee, Han-Gil;Kwon, Young-Kyung;Park, Yong-Sup
Proceedings of the Korean Vacuum Society Conference
/
2010.08a
/
pp.63-63
/
2010
Using both experimental and theoretical approaches, we have investigated the adsorption properties of an organic molecule (HATCN), which is used in OLEDs as an efficient hole injection layer, on metal and inert surfaces. We have also studied the structural and electronic properties of such interfaces and the dependences on deposition thickness. We have observed different trends in work function changes with different surfaces. Our photoelectron spectroscopic measurements have revealed an abnormal phenomenon in HATCN on a metal (Cu) surface: the work function decreases at lower coverage (~monolayer) of HATCN on a metal (Cu) surface, but it increases back and becomes higher than that of a bare Cu surface at higher coverage. It has, on the contrary, been observed that the work function of graphene surface just increases as the HATCN coverage increases. Our first-principles density functional calculations has not only verified our experimental observations, but also disclosed the underlying mechanism of such abnormal and different work function behaviors. We have found that the change in work function results from mutual polarization induced by the geometrical deformation and the bond dipole formed at the interface due to the charge redistribution. At low coverage of HAT-CN on Cu substrate, the former reduces the work function significantly by pulling down the vacuum level, while the latter tends to push up the vacuum level resulting in the work function increase.
The purpose of this study was to evaluate the adaptation of root canal filling material to the dentinal wall of root canal and to compare the sealing ability of the root canal filling materials using ultrasonic endodontic instrument with injection-molded thermoplasticized gutta-percha filling method and lateral condensation method. Fifty fresh human single root exlracted for orthodontic treatment, were randomly selected, and instrumented by step-back technique. And then, the teeth were divided into 5 groups according to each root canal filling methods. In the experimental group 1 and group 2, the root canals were filled with gutta perdia cases using ultrasonic instrument with and without sealer. In the experimental group 3 and 4, using jection-moldeed thermoplasticized gutta-percha method by obtul$^{(R)}$ canals were filled with and without sealer. In the control group, the canals were filled with sealer by lateral candensation. And then, 5 teeth of each group were immersed in black Indian ink, decalcified and cleared. The depth of dye penetration into the root canal were evaluated with stereoscope (Reichert Ltd., USA). Among the 5 teeth remaining in each group, the single longituding grooves were made on the labial and lingual root surfaces and then immersed in the liquid nitrogen to fracture the teeth spontaneously without any distortions of gutta-percha. Each specimens were examined with X-650 Scanning Electron Microscope(Hitachi ltd, Japan) to show the adaptation to the canal wall, void, homogenicity of filling material and location of gutta-percha or sealer in the dentinal tubules of the root canal. The observations were as follows : 1. The experimental group 1 showed smaller mean dye penetration than control group, and showed the penetraton of sealer in the dentinal tubules of apical third of the root canal. 2. The experimental group 2 and group 4 showed the penetration of gutta-percha in the dentinal tubules of root canals. 3. The experimental group 1 and group 3 showed less mean dye penetration than the experimental group 2 and group 4. 4. The experimental group 1 and group 2 showed better adaptation of filling materials than control group.
Back ground : Cerebral palsy(CP) is a static encephalopathy caused by an insult to the brain during the prenatal, perinatal, or postnatal period (ie, up to 2 years). CP can lead to global dysfunction but always includes motor problems Objective : The purpose of this study is to investigate the current tendency of oriental approach to the CP and promote oriental treatment of CP in Korea Method : Investigation of current literature and clinical paper in Korea and Chinese Result and Conclusion : 1) CP fall under the category of wu-chi(five kinds of retardations : 五遲), wu-ruan(five kinds of flaccidity : 五軟), wu-ying(five kinds of Stiffness : 五硬) in oriental medicine and correspond to naoxing-tanhuan in current chinese medicine. 2) CP is mainly caused by weakness of the liver and kidney(肝腎不足), weakness of the spleen and stomach(脾胃虛弱), and the method of treatment is tonify the liver and kidney(補益肝腎), tonify the spleen and replenish qi(補脾益氣), but yu-chi(the faculty of speech : 語遲) is caused by deficiency of the heart(心虛) so that treated with method of invigorating the heart and nourishing blood(補心養血). Recently blood stagnancy the stagnation of qi(氣滯血瘀) is considered as the cause of CP, promoting qi circulation to invigorate blood(行氣活血) is mentioned the treatment of method. 3) In addtion to a herbal medication and acupuncture, the various treatments of scalp acupuncture(頭鍼), acupoint injection(穴位注射), catgut embedding therapy(埋鍼) etc. had been applicated to CP and for the objective evaluation of remedial value, TCD, EEG, BMD have been used.
Journal of Physiology & Pathology in Korean Medicine
/
v.16
no.3
/
pp.588-593
/
2002
Paraquat, one of the potent herbicides, causes fatal damage to many vital organs, when orally ingested, resulting in circulatory failure, respiratory distress syndrome, and a few other serious problems, but there is no known specific antidote against it. Of the possible problems related to paraquat intoxication, oliguric acute renal failure, which has been known to develop within 24 or 48 hours after intoxication, are notoriously life-threatening. So we attempted to investigate the clinical characteristics and progress of paraquat-induced acute renal failure and the therapeutic possibilities of herbal medicines. All of the fifteen subjects were treated with intravenous fluid injection of 5% dextrose saline or 10% dextrose water in conjunction with herbal medicines which were used for oral administration or gargling. Gamdutang, a decoction of Semen Glycin(黑豆 200g) and Radix Glycyrrhizae(甘草 100g) with addition of other herbs when necessary, was administered orally. At the same time, gargling fluid, consisted of Chinese ink(墨汁), char-frying powder of Rhei Rhizoma(大黃炒炭末), Succus phyllostachyos(竹瀝), was used to detoxify the oral cavity. Serum levels of Blood Urea Nitrogen(BUN) and Creatinine reached its peak on the third day of hospitalization, but then decreased and fell within the normal range on the 7th day and remained there. Serum levels of Na+ and K+ decreased down below the lower limits of normal range on the 7th day and on the 3rd day, respectively. Then they returned back within normal limits. Mean urine output on the 1st day of hospitalization was 1,050ml and it continuously increased to reach more than 2,000ml on the 14th day. From that day on, it stayed over 2,000ml. Fifteen cases of acute renal failure caused by paraquat intoxication were treated with combined treatments of oriental and western medicine in our hospital. However, we think that it is necessary to study further about the way to combine oriental and western medicine, to find out a more effective treatment method.
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