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Treatment of Bone Repair by Inductively Magnetic Fields
Ahn, Jae Mok,Lee, Woo Cheol,Kim, Hee Chan,Min, Byoung Goo 大韓醫用生體工學會 1992 대한의용생체공학춘계학술대회논문집 Vol.14 No.1
An Inductively coupled magnetical signal(pulse wave, 0.7 to 60Hz, eighteen volts peak to peak) that was applied non-invasively on the skin surface overlying the approximate site, measure position). in the group with unipolar pulse signal currents produced smaller than in the group with bipolar pulse signal. The signal was transmitted to the active coil, including a time-varying magnetic field: this in turn induced a time-varying electrical field in the field in the bone. It is very important to determine system parameters due to treatment time(healing) and the simplicity. This paper investigation was designed to compare the relative effects of pulsed unipolar currents with the effects of an identical pulsed bipolar currents. Since inductive coupling is non-invasive and invoives portable equipment, It is easy to apply and requires precise localizatlon, It has distinct advantages and field characteristics along the bone for each different signal.
New Fluid Flow System for Simulation of Mechanical Loading to Bone Cells During Human Gait Cycle
Ahn, Jae-Mok The Korean Society of Medical and Biological Engin 2007 의공학회지 Vol.28 No.3
Mechanical loading to bone cells using simple sine wave or constant wave fluid flow has been widely used for in vitro experiments. Human gait is characterized by a complex loading to bones of lower extremities which results from a series of events consisting of heel strike, foot flat and push-off during the stance phase of the gait cycle. Telemetric force analyses have shown that human femora are subject to multiphasic loading. Therefore, it would be ideal if the physiologic loading conditions during human walking can be used for in vitro mechanotransduction studies. Here, for a mechanotransduction study, we develop it fluid flow system (FFS) in order to simulate human physiologic mechanicalloading on bone cells. The development methods of the FFS including the COR (Center for Orthopedic Research), monitor program are presented. The FFS could generate various multiphasic loading conditions of human gaits with output flow. Wall shear distribution was very uniform, with 81 % of the effective loading area of the culture on a glass slide. Our results demonstrated that the FFS, provide a new translational approach for unveiling molecular mechanotransduction pathways in bone cells.
( Jae Hyang Lee ),( So Ra Yoon ),( Ga Yoon Na ),( Mira Jun ),( Mok Ryeon Ahn ),( Jae Kwan Cha ),( Oh Yoen Kim ) 한국임상영양학회 2016 Clinical Nutrition Research Vol.5 No.1
Diabetes and impaired fasting glucose are associated with incidence of cerebro-/cardio-vascular diseases. This study hypothesized that fasting glycemic status may reflect cerebrovascular risk in non-diabetic Koreans. Fasting glycemic status, lipid profiles, oxidative stress, and inflammation markers were measured in non-diabetic subjects (healthy controls, n = 112 and stroke n = 41). Systolic blood pressure, fasting glucose, glycated hemoglobin (HbA1C), triglycerides, high sensitivity C-reactive protein (hs-CPR), interleukin-6, and tumor necrosis factor-alpha were higher, and high density lipoprotein (HDL)-cholesterols were lower in patients with stroke than healthy controls. Fasting glucose positively correlated with hs-CRP, interleukin-6, tumor necrosis factor-alpha, oxidizedlow density lipoprotein (LDL) and malondialdehyde. The significances continued or at least turned to a trend after adjustments for confounding factors. Multiple regression analyses revealed that fasting glucose was mainly associated with cerebrovascular risk (ß``-coefficient = 0.284, p < 0.0001) together with age, systolic blood pressure, total cholesterol, hs-CRP, body mass index, dietary poly unsaturated fatty acid/saturated fatty acid (PUFA/SFA), and HbA1C (r2 = 0.634, p = 0.044). The subjects were subdivided by their fasting glucose levels [normal fasting glucose: 70-99 mg/dL, n = 91 [NFG-control] and n = 27 [NFG-stroke]; higher fasting glucose: 100-125 mg/dL, n = 21 [HFG-control] and n = 14 [HFG-stroke]). In both controls and stroke patients, HFG groups show higher triglyceride, total- and LDL-cholesterol and lower HDL-cholesterol than NFG groups. Control-HFG group showed significantly higher levels of oxidative stress and inflammation than control NFG group. Stroke-HFG group also showed significantly higher inflammatory levels than stroke-NFG group, moreover the highest among the groups. Additionally, stroke-NFG group consumed higher PUFA/SFA than stroke-HFG group. Fasting glucose may be a useful indicator for cerebrovascular risk in non-diabetic individuals which may be mediated by oxidative stress and inflammation status.
Fiber-optic waveguide coupled surface plasmon resonance sensor.
Ahn, Jae Heon,Seong, Tae Yeon,Kim, Won Mok,Lee, Taek Sung,Kim, Inho,Lee, Kyeong-Seok Optical Society of America 2012 Optics express Vol.20 No.19
<P>A novel approach to give an excellent tunability and self-referencing capability was presented by applying a concept of waveguide coupled surface plasmon resonance mode to a fiber-optic sensor. The presence of dielectric waveguide sandwiched between two metal layers made it possible to precisely tune the resonance wavelength in a broad range from visible to infrared region and to generate multiple modes which may be selectively used for suitable applications. Our approach also verified the potential capability of self-referencing based on a remarkable difference in sensitivity between the plasmonic and waveguide modes excited by p- and s-polarized lights, respectively, without using an additional reference channel. Experimental measurement carried out on sucrose solutions with varying concentration demonstrated the feasibility of our approach.</P>
睦偵銀,張仁態,李在玄,安致烈 中央醫學社 1976 中央醫學 Vol.30 No.6
Duodenal atresia in the newborn infant is an uncommon congenital anomaly which may be due to a primary developmental defect of the intestine. Vomiting is the first and most characteristic symptom, usually begins within few hours after delivery. The vomitus is usually bile-stained. In most cases, the diagnosis can be confirmed by an upright X-ray of the abdomen demonstrating the double bubble appearance. Unless other anomaly or pre maturity is associated, either duodenoplasty ors by pass procedures has been, shown to be the most effective one. We recently experienced a case of the congenital, duodenal atresia of 3 days .old female newborn. An upright X-ray of the abdomen failed to show the typical double bubble appearance, therefore definite diagnosis was made by Hypauge opacification through nasogastric tube. Being no other anomaly associa?ted with this infant, prompt surgical intervention was undertaken after minimal time, spent for correction of fluid and electrolytes imbalance. A duodeno je junostomy was done and she left hospital uneventfully on tenth postoperative day.
Mathematical Model of a Monolith Catalytic Incinerator
Ahn, Wha Seung,Jang, Soo Hyun,Ha, Jae Mok,Park, Kwang Ja 한국화학공학회 1999 Korean Journal of Chemical Engineering Vol.16 No.6
A set of 1-dimensional mathematical models were developed to simulate both the steady state and transient performance of monolithic catalytic incinerators for VOC abatement. In modelling transient performance, quasi-steady state gas phase was assumed since transient response time is determined primarily by the thermal inertia of the monolith. Higher inlet gas temperatures and lower gas velocities were predicted to give higher conversion and faster response times. VOC concentration had little influence on the performance within the concentration ranges used. A catalytic incinerator is shown to operate typically under mass transfer limited conditions, and monolith channel density and shape have significant influence on the conversion and monolith heating time. The metallic monolith was predicted to show superior steady state and transient responses due to its lower thermal inertia generated by higher cell density and thinner wall.
Pyrazolidine Derivatives with Heteroaryl Urea as Dipeptidyl Peptidase IV Inhibitors
Ahn, Jin Hee,Jung, Sun Ho,Kim, Jin Ah,Song, Seog Beom,Kwon, Soon Ji,Kim, Kwang Rok,Rhee, Sang Dal,Park, Sung-Dae,Lee, Jae Mok,Kim, Sung Soo,Cheon, Hyae Gyeong The Pharmaceutical Society of Japan 2005 Chemical & pharmaceutical bulletin Vol.53 No.8
<P>In the continuation of efforts to modify the structure of our novel DP-IV inhibitors, a series of pyrazolidine derivatives with heteroaryl urea was synthesized and evaluated for their ability to inhibit dipeptidyl peptidase IV (DP-IV).</P>
양식넙치(Paralichthys olivaceus)의 복수증에 관한 연구 -Edwardsiella tarda의 일부 특성과 병원성 및 대책-
한재철 ( Jae Cheol Han ),김영진 ( Young Jin Kim ),서형석 ( Heyng Seok Seo ),김영길 ( Young Gill Kim ),이근광 ( Keun Kwang Lee ),안병목 ( Pyoung Mok Ahn ) 한국동물위생학회 1997 한국동물위생학회지 (KOJVS) Vol.20 No.1
Characteristics, pathogenicity and control of the causative organisms isolated from diseased cultured flounder, Paralichthys olivaceus were studied. The causative organisms were identified as E tarda by biochemical and biophysical characteristics. Also, it strains were named as E tarda KBF-1 and E tarda KMF-1, and optimal pH of E tarda KBF-1 and E tarda KMF-1 were 8.0, and optimal concentration of NaCl. E tarda KBF1 was 0% and E tarda KMF-1 was 1%. In the pathogenicity test, 0~10 of the flounders of artificially infected group(E tarda KEF-1) with l0×l07cfu/fish were died within 60 hrs, but 0~9 flounders infected group with l.0×106 cfu/fish were died within 60 hrs. Also, 0~10 flounders infected group(E tarda KMF-1) with 1.0×l07cfu/fish were died within 36 hrs, while 0~7 flounders infected with l0×l06cfu/fish were died within 60 hrs. Drug sensitivity of E tarda KBF-l strain was resistant to AM, CF and N, and intermediate to E, K and S, and sensitivity to C, G, SxT and FF. But E tarda KMF-l strain was resistant to CF, E and V, and intermediate to AM, C, N and SxT, and sensitivity to GM and FF.
장재율(Jae Yool Jang),안영준(Young Joon Ahn),정중기(Jung Kee Chung),정인목(In Mok Jung),허승철(Seung Chul Heo),황기태(Ki-Tae Hwang),안혜성(Hye Seong Ahn),신은(Eun Shin),서자희(Ja Hee Seo) 대한외과학회 2010 Annals of Surgical Treatment and Research(ASRT) Vol.78 No.5
Adenosquamous carcinoma arising in congenital choledochal cyst is very rare and herein we report a case thereof. A 37-year-old woman was referred for further evaluation of pancreas head mass and a hepatic nodule on CT. She had been diagnosed with congenital choledochal cyst at 22-years-old and received Roux-en-Y choledochojejunostomy at that time. Endoscopic ultrasonography-guided biopsy proved the pancreas head mass as a squamous cell carcinoma and liver biopsy also proved the liver mass as a metastatic squamous cell carcinoma. We performed pancreaticoduodenectomy and tumorectomy of metastatic liver nodule. Grossly, the primary lesion was located at intrapancreatic portion of choledochal cyst. Histologically, the primary lesion and hepatic nodule was metastatic adenosquamous carcinoma. So far, there have been only three cases of adenosquamous carcinoma arising in congenital choledochal cyst reported in English-language literature. This is another case and the first case reported in Korea.