• Journal of the Korean Society of Food Science and Nutrition
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• v.31 no.5
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• pp.802-807
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• 2002

This study was conducted to see effects of dietary bacterial fiber produced by Gluconoucetobacter hansenii on gross structure, and disaccharidase activities of small intestine and body lipid status in rats. Bacterial fiber was prepared by drying and alkali treatment of floating membrane produced IS days after the bacterial culture using coconut juice media. Male Sprague-Dawely rats of 320+10 g were grouped into three and fed 0.5% (w/w) cholesterol diets with three different dietary fibers, i .e. cellulose, and pectin and bacterial fiber, at the level of 2% (w/w). During four-week experimental period, food intakes and body weight gains were not different among three groups. Total lengths and jejunal fragment weights of small intestine did not differ among the three groups but cecal weight was higher in bacterial fiber groups than those of the other two groups. Colon content and fecal dry weight were lower in bacterial fiber group. Sucrase activity of the jejunal mucosa was lower in bacterial fiber group but maltase activity was not different from those of the other two groups. Plasma total cholesterol level was lower and that of HDL-cholesterol higher in pectin group than those of cellulose and bacterial fiber groups, the latter of which did not differ. Both in plasma and liver triglyceride levels were lower in bacterial fiber group than cellulose and pectin groups, and liver cholesterol level was lower in pectin group. Relative liver weights and Plasma activities of GOT md GPT were not different among three groups. It is concluded that bacterial fiber used in the present study had hypotriglyceridemic effect that help improve lipid status in the body.

• The Journal of Korean Institute of Electromagnetic Engineering and Science
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• v.17 no.2 s.105
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• pp.89-94
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• 2006

A compact microstrip band-selective filter for ultra-wideband(UWB) radio system is proposed. The filter combines the traditional short-circuited stub highpass filter and coupled resonator band-stop filter on both sides of the mitered 50-ohm microstrip line. To realize the pseudo-highpass filtering characteristic over UWB frequency band(3.1 GHz to 10.6 GHz), a distributed highpass filter scheme is adopted. Three coupled resonators are utilized to obtain the band stop function at the desired frequency band. By meandering the coupled resonators, there is $29\;\%$ size reduction in footprint compared to the traditional band-stop filter using L-shaped resonators. The measured results show that the filter has a wide passband of $146.7\;\%$(2.1 GHz to 10.15 GHz) with low insertion loss and the stop band of $10.04\;\%$(5.2 GHz to 5.75 GHz) for 3-dB bandwidth. The measured group delay is less than 0.7 ns within the passband except the rejection band.

• Investigative Magnetic Resonance Imaging
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• v.3 no.2
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• pp.188-195
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• 1999

The fMRI signals are composed of many various signals. It is very difficult to find the accurate parameter for the model of fMRI signal containing only neural activity, though we may estimating the signal patterns by the modeling of several signal components. Besides the nose by the physiologic motion, the motion of object and noise of MR instruments make it more difficult to analyze signals of fMRI. Therefore, it is not easy to select an accurate reference data that can accurately reflect neural activity, and the method of an analysis of various signal patterns containing the information of neural activity is an issue of the post-processing methods for fMRI. In the present study, fMRI data was analyzed with the Independent Component Analysis(ICA) method that doesn't need a priori-knowledge or reference data. ICA can be more effective over the analytic method using cross-correlation analysis and can separate the signal patterns of the signals with delayed response or motion related components. The Principal component Analysis (PCA) threshold, wavelet spatial filtering and analysis of a part of whole images can be used for the reduction of the freedom of data before ICA analysis, and these preceding analyses may be useful for a more effective analysis. As a result, ICA method will be effective for the degree of freedom of the data.

• Korean Journal of Food Science and Technology
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• v.52 no.5
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• pp.450-458
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• 2020

The purpose of this study was to conduct a systematic review of the current published research related to improvement in cognitive function. A systematic search was performed in three bibliographic databases (PubMed, Cochrane Library, and EMBASE) using "dementia", "memory", "food", "diet", and "nutrition" as keywords. Meal management intervention, including Dietary Approaches to Stop Hypertension (DASH) diet, Mediterranean (Med) diet, Diet Mediterranean-DASH Intervention for Neurodegenerative Delay (MIND) diet, and other studies, was also included in the analysis. Through extensive screening, 21 articles, out of 2101 papers retrieved, were used for the final systematic review. The methodological quality of the randomized controlled clinical trials (RCTs) was assessed using the Cochrane Risk of Bias tool. These articles recommended vegetables, fruits, whole grains, olive oil, fish, berries, nuts, and beans. In conclusion, this study suggests the potential use of meal management to improve cognitive function.

• Korean Journal of Food Science and Technology
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• v.38 no.6
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• pp.838-842
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• 2006

Gum was added to Jeungpyun (steamed Korean rice cake) to extend the shelf life and prevent retrogradation. The hardness of Jeungpyun was analyzed and the type of retrogradation was calculated by the Avrami equation. Guar gum, xanthan gum and pullulan were added to the steamed Korean rice cake at contents of 0.05%, 0.1% and 0.5% (w/w). The moisture contents of the steamed Korean rice cake stored at $4^{\circ}C$ remained unchanged over the three days. When the concentration of added gums was less than 0.1 %, the hardness was lower than that of the non-added gum. At a gum concentration of 0.5%, the hardness of Jeungpyun with added guar gum and xanthan gum was higher than that of pullulan and non-added Jeungpyun. The types of retrogradation varied according to the amount and the kind of the added gums. The type of retrogradation of pullulan-added rice cake was similar to that of xanthan-added rice cake. The Avrami exponent of pullulan-added and xanthan-added Jeungpyun was 1.4${\sim}$1.49 and 1.25${\sim}$1.43, respectively. As the concentrations of pullulan were increased from 0.05% to 0.5%, the time constant (1/k) increased from 5.37 to 15.65. Pullulan and xanthan gum were confirmed to be more effective than guar gum for preventing the retrogradation of the steamed Korean rice cake known as Jeungpyun.

• Journal of Chest Surgery
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• v.38 no.10 s.255
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• pp.717-720
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• 2005

Here we report a case of posterior left ventricular (LV) free wall rupture following postinfarct ventricular septal rupture (VSR). A 58-year-old man was transferred to the hospital under the impression of acute myocardial infarction. Posterior VSR was seen on echocardiographic examination. The intraaortic balloon pump catheter was introduced percutaneously and the emergent operation was proposed. Sudden circulatory collapse was developed shortly after the anesthetic induction and the patient's chest was hurriedly opened while on cardiopulmonary resuscitation. The acute cardiac tamponade was seen and the blood was seen pumping from the longitudinal tear at the mid-level of LV posterior wall, measuring 2 cm in length. The cardiopulmonary bypass was set and LV reconstruction was done. The postoperative recovery was delayed due to the brain injury presumably caused by preoperative cardiac arrest.

• The Korean Journal of Mycology
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• v.41 no.1
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• pp.1-8
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• 2013

COP9 signalosome (CSN), which is originally identified as the regulator of the photomorphogenic development in plant, is highly conserved protein complex in diverse eukaryotic organisms. Most eukaryotic CSN complex is composed of 8 subunits, which is structurally and functionally similar to the lid subunit of 26S proteasome and eIF3 translation initiation complex. CSN play important functions in the regulation of cell cycle and checkpoint response by controlling Cullin-Ring E3 ubiquitin ligases (CRL) activities. CSN exhibits an isopeptidase activity which cleaves the neddylated moiety of cullin components. In fission yeast, S-phase cell cycle progression was delayed and the sensitivity to g-ray or UV was increased in CSN1 and CSN2 deletion mutants, indicating that yeast CSN is also involved in the checkpoint regulation. CSN in fungal system more closely resembles that of the higher organisms in the structure and assembly of their components. Functionally, CSN is associated with the regulation of conidiation rhythms in Neurospora crassa and the sexual development in Aspsergillus nidulans. Recent studies also revealed that CSN functions as an essential cell cycle regulator, playing key roles in the regulation of DNA replication and DNA damage response in Aspergillus. Overall, CSN of microorganisms, such as fission yeast and fungi, share functionally common aspects with higher organisms, implying that they can be useful tools to study the role of CSN in the CRL-mediated diverse cellular activities.

• Archives of Plastic Surgery
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• v.38 no.6
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• pp.883-885
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• 2011

Purpose: Nevus sebaceus is a congenital hamartomatous lesion, typically involving head and neck. Various benign and malignant neoplasms can develop in association with nevus sebaceus. We report a case of simultaneous occurrence of squamous cell carcinoma and basal cell carcinoma in nevus sebaceus. Methods: A 73-year-old man presented with erythematous to black verrucous nodules on the right subauricular area. The upper part was accompanied with inflammation and ulceration, and no specific findings suspicious for malignant degeneration were found in the lower part preoperatively. The mass was totally excised and the defect was directly closed. Lymph nodes were not involved on concomitant neck dissection. Results: Histopathologic examination confirmed the presence of squamous cell carcinoma in the upper part and basal cell carcinoma in the lower part of a nevus sebaceus. Negative margins were achieved on resection. No clinical problems were found during the 3-month follow-up period. Conclusion: We experienced a rare case of simultaneous occurrence of squamous cell carcinoma and basal cell carcinoma within the same nevus sebaceus. Because patients with nevus sebaceus have risk of malignant changes, surgical excision and work-up for recurrence and metastasis should be considered in suspicious cases. And even in a totally asymptomatic case, the possibility of occult secondary cancer should be informed before surgery in aged patients.

• Journal of the Korean Institute of Gas
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• v.24 no.5
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• pp.29-38
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• 2020

It is practically difficult to accurately measure the temperature and concentration of a large combustion systems at industrial sites in real time. Temperature measurement using thermocouple, which are mainly used, is a point-measuring method that is less accurate and less reliable to analyze the wide area range of inner combustion system, and has limitations to internal accessibility. In terms of concentration analysis, most measurement methods use sampling method, which are limited by the difficulty of real-time measurement. As a way to overcome these limitations, laser-based measurement methods have been developed continuously. Laser-based measurement are line-average measurement methods with high representation and precision, which are beneficial for the application of large combustion systems. In this study the temperature and concentration were measured in real time by water vapor and oxygen generated during combustion using Tunable Diode Laser Absorption Spectroscopy (TDLAS). The results showed that the average temperature inside the combustion system was 1330℃ and the mean oxygen concentration was 3.3 %, which showed similar tendency with plant monitoring data.

• Korean Journal of Pharmacognosy
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• v.40 no.4
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• pp.309-314
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• 2009

Licorice(Glycyrrhizae Radix et Rhizoma) is recorded as the root of Glycyrrhiza uralensis Fischer or Glycyrrhiza glabra Linne or Glycyrrhiza inflata Bat.(Leguminosae) in Korean Pharmacopoeia $9^{th}$ edition (KP9) and Chinese Pharmacopoeia 2005(CP2005), Glycyrrhiza uralensis Fischer or Glycyrrhiza glabra Linne in Japanese Pharmacopoeia 2005(JP2005). It is established the content standard of Glycyrrhizin 2.5 % and liquiritin 1% in KP9 and CP2005. But, according to the reports, all Licorice species were not sufficient for content standard of liquiritin 1.0% for licorice in KP9 and CP2005. It shows different content of liquiritin among G. uralensis, G. glabra and G. inflata. Also, it was reported liquiritin, liquiritin apioside are transformed into liquiritigenin by human internal flora. Therefore, we have studied for the pre-treatment condition and analytical method of liquiritigenin; It was good efficinet in 2M HCl reflux(1 hr) for hydrolysis and in methylene chloride for solvent fractionation. And 1% acetic acid in DW(A) and acetonitrile(B) with gradient condition as a mobile phase was most effective in HPLC analytical condition. According to these experimental methods, we have anlayzed content of liquiritigenin about 77 Licorice sample. In this research, it was also examined the content of liquiritin and liquiritigenin for Glycyrrhizae Radix related growing area. According to the results, we suggested the content standard of glycyrrhizin more than 2.5%, liquiritigenin more than 0.7%(after hydrolysis) of licorice.