• Korean Journal of Pharmacognosy
• /
• v.41 no.3
• /
• pp.161-165
• /
• 2010

A study was performed to assess the quality equivalence of commercially available Hwang-Ryun-Hae-Dok-Tang granules from various vendors in terms of the contents of characterizing compounds. 'Hwang-Ryun-Hae-Dok-Tang'(or 'Huanglian Jiedu Tang') is the complex medicinal herbal product which is composed of four different herbal drugs; Scutellariae Radix, Coptidis Rhizoma, Phellodendri Cortex and Gardeniae Fructus. Using a high performance liquid chromatography and direct analysis in real time mass spectrometer (DART-MS), five characterizing compounds such as baicalin, baicalein, berberine, palmatine, and geniposide were analyzed to compare the variance of the contents between the products from four different vendors. Although five characterizing compounds were all successfully detected from all the products, the contents of each compound were shown to have significant difference among vendors. For real time monitoring of characterizing compounds in medicinal herbal products, DART-MS can be successfully adopted as a powerful analytical tool.

• Korean Journal of Pharmacognosy
• /
• v.44 no.2
• /
• pp.138-148
• /
• 2013

The three biochemical constituents pointed out as the bioactive principles of anticancer activity of Korean mistletoes, Viscum album var. colorantum, epiphyting to different host trees, different region, and different growth environments were compared. The characterizing compounds were lectin, which was glycoprotein reported has anticancer activity, homoflavoyadorinin-B, which was flavonoid glycoside reported as an antioxidant and oleanolic acid, as an anticancerous triterpenoid. We established the analysis methods for three characterizing compounds and determined by HPLC spectrophotometer, respectively. The average content of the lectin in V. album was 1.75 mg/g of dried plants and those of homoflavoyadorinin-B and oleanolic acid were 3.51 and 5.37 mg/g, respectively. The variations of contents of the three characterizing compounds according to epiphytic trees and growth region were observed but not found statistical significance clearly. We came to the conclusion that the contents of bioactive constituents of V. album except homoflavoyadorinin-B are not affected by epiphyting trees or growth environments.

• Journal of the Korean Statistical Society
• /
• v.35 no.1
• /
• pp.91-103
• /
• 2006

Yun (2005) introduced an estimator of the second order parameter characterizing the tail behavior of probability distributions and proved its consistency. In this paper we prove its asymptotic normality under a third order condition.

• Journal of the Korean Statistical Society
• /
• v.34 no.4
• /
• pp.273-280
• /
• 2005

In this paper we introduce an estimator of the second order parameter characterizing the tail behavior of probability distributions and prove its consistency.

• Journal of Physiology & Pathology in Korean Medicine
• /
• v.28 no.3
• /
• pp.322-329
• /
• 2014

The purpose of this study was to investigate the quality of two different commercial Bangpungtongseong-san (BTS) extract granules (BTS-2 and BTS-3) by comparing with BTS decoction (BTS-1). The contents of characterizing components and biological activities of two different commercial BTS extract granules were compared with those of the BTS decoction. The contents of characterizing components were analyzed with HPLC. The antioxidative effects were determined by measuring 2,2-diphenyl-1-picrylhygrazyl (DPPH) radical scavenging and superoxide dismutase (SOD)-like activity. Also, we compared the effects on lipid accumulation and reactive oxygen species (ROS) production during differentiation of 3T3-L1 preadipocytes. The contents of five components except liquiritin and sennoside A were higher in BTS-1. The DPPH radical scavenging and SOD-like activity were higher in BTS-1. BTS-1 significantly inhibited lipid accumulation during differentiation of 3T3-L1 preadipocytes and showed stronger effects than BTS-2, BTS-3. In addition BTS-1 showed stronger inhibition effects on ROS production during differentiation of 3T3-L1 preadipocytes than BTS-2, BTS-3. These results indicate that BTS decoction has strong biological activities than commercial BTS extract granules. It is also consistent with the contents of characterizing components.

• Proceedings of the KIEE Conference
• /
• 2002.07a
• /
• pp.304-306
• /
• 2002

This paper presents a new method to characterize sag event. Power quality monitoring algorithm to analyze PQ problems is described. This paper shows that conventional characterizing method which makes use of only sag magnitude and sag duration has some limitations. It characterizes non-rectangular sag as more severe one. In addition, it can't count on voltage tolerance characteristics of each apparatus. In order to solve these problems, this paper present a new characterizing method and it properly characterizes non-rectangular sag considering the voltage tolerance characteristics.

• Journal of Korea Technical Association of The Pulp and Paper Industry
• /
• v.40 no.5
• /
• pp.11-19
• /
• 2008

The paper established a new method for fast measurement and characterizing of sub-visible dirt of recycled paper which is too small to be seen with naked eye. This method provided a new way for the evaluation of recycled paper that is hard to be characterized by the conventional method. Two effective thresholding algorithms HA and SDA were compared and their applicable conditions were discussed. Results showed that the HA could be used for un-printed paper while SDA is suited for recycled papers. The gloss of paper samples was measured and the relation between gloss and sub-visible dirt was investigated. The significant effect of this method for characterizing and comparing paper was exhibited. The experiment results indicated that sub-visible dirt measuring method could be a complementariness of the conventional methods.

• Journal of the Korean Mathematical Society
• /
• v.37 no.2
• /
• pp.297-308
• /
• 2000

We survey results, obtained in the past three years, on characterizing bounded (and Kobayashi-hyperbolic) Reinhardt domains by their automorphism groups. Specifically, we consider the following two situations: (i) the group is non-compact, and (ii) the dimension of the group is sufficiently large. In addition, we prove two theorems on characterizing general hyperbolic complex manifolds by the dimensions of their automorphism groups.

• Journal of Biosystems Engineering
• /
• v.22 no.4
• /
• pp.433-438
• /
• 1997

The freshness of apple was evaluated by characterizing the surface texture of flesh cells. The freshness index which was related to the amount of wrinkles on the cell surface was defined to quantify the freshness. Four parameters relevant to the amount of the cell wrinkles were selected and measured using image analysis including wrinkle extraction procedure and Fast Fourier Transform of a wrinkle-extracted image. Out of 4 parameters, three parameters had highly significant correlations with the time elapsed after harvest. But it was concluded that two parameters out of such 3 parameters could be used for description of freshness index.

• Journal of the Chungcheong Mathematical Society
• /
• v.24 no.3
• /
• pp.469-480
• /
• 2011

Park, Ryu, and Lee recently defined a Henstock-type integral, which lies entirely between the McShane and the Henstock integrals. This paper presents two characterizing convergence conditions for this integral, and derives other known convergence theorems as corollaries.