• Title/Summary/Keyword: Quantitative research

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Quantitative Analysis of Marker Substance in Fermented Rehmanniae Radix Preparata (고체발효 숙지황의 지표성분 함량분석)

  • Park, Hwa-Yong;Um, Young-Ran;Ma, Jin-Yeul
    • Korean Journal of Pharmacognosy
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    • v.41 no.1
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    • pp.58-61
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    • 2010
  • Medicinal plant Rehmanniae Radix has long been used as traditional herbal medicine in Korea. In this study, we investigated quantitative changes of marker substance 5-hydroxymethyl-2-furaldehyde (5-HMF) in Rehmanniae Radix Preparata fermented with Ganoderma lucidum, Paecilomyces japonica, honey, and Nuruk, using HPLC according to the Korean Pharmacopoeia. As a result, 5-HMF was decreased in SDT and SYT, and increased in SST and SNT, comparing with control group. Quantitative increasing of 5-HMF is not exactly in direct proportion with fermentation, and it is need further studies to elucidate mechanism of quantitative changes by converted and newly produced substances with fermentation.

Isolation and Quantitative Determination of Costunolide from Saussurea Root (목향(Saussureae Radix)으로부터 Costunolide의 분리 및 함량분석)

  • Kim, Ju-Sun;Chi, Hyung-Joon;Chang, Seung-Yeup;Ha, Kwang-Won;Kang, Sam-Sik
    • Korean Journal of Pharmacognosy
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    • v.30 no.1
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    • pp.48-53
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    • 1999
  • Isolation and quantitative determination of costunolide from Saussurea lappa Clarke (Compositae) has been conducted by using HPLC method. Costunolide in an acetone extract from the crude drug was separated on a RP-18 column using a $MeOH-H_20$ mixture (65:35) as an eluent and the average content is about $1.32{\sim1.42%.$ The content of costunolide in dried extract was decreased by about 24% in seven days. However it showed a slight decrease in solution. It is highly recommended that quantitative determination of costunolide from Saussureae Radix should be conducted as early as possible after solvent extraction.

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Isolation and Quantitative Determination of Patchouli alcohol from Pogostemon cablin Benth. (광곽향(Pogostemon cablin Benth.)으로부터 Patchouli alchol의 분리 및 함량분석)

  • Kim, Ju-Sun;Chi, Hyung-Joon;Won, Do-Hee;Kang, Sam-Sik
    • Korean Journal of Pharmacognosy
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    • v.29 no.1
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    • pp.18-21
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    • 1998
  • A method for isolation and quantitative determination of patchouli alcohol from Pogostemonis Herba (Pogostemon cablin) has been developed. Isolation of patchouli alcohol was achieved by column chromatography employing the normal-phase gradient separation system n-hexane-ether on silica gel column. The GC method for quantitative determination of patchouli alcohol provided a method for standardization of the raw drug. It suggested that the average content of patchouli alcohol in Pogostemonis Herba is about 0.26%.

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Comparative on Impact of Qualitative and Quantitative of ERP Systems on Korean Firms (국내 기업 ERP 시스템 도입의 정성적.정량적 성과 비교)

  • Kang, Da-Yeon;Chang, Hwal-Sik;Kim, Jong-Ki
    • The Journal of the Korea Contents Association
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    • v.9 no.4
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    • pp.142-153
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    • 2009
  • As many companies have adopted and used ERP systems, concerns about ERP performance also have increased. The purpose of this research is to examine the relationships between qualitative variables and quantitative variables measuring ERP performances. Qualitative research, widely used in MIS research, typically examines perceived usefulness of ERP, such as information quality, system quality, system satisfaction. Quantitative research, often done in accounting research, usually examines ERP performance based on financial statements. An empirical study led to the following conclusions: 1) There were significant correlations among the qualitative variables measuring perceived usefulness of ERP; 2) Significant correlations were also observed among the quantitative variables based on financial statements; 3) However, no significant correlations was found between the qualitative variables and quantitative variables measuring ERP performance.

A Study on PCB Analysis of Insulating Oil in Waste Condenser (폐콘덴서의 절록유 중에 함유된 PCB 분석에 관한 연구)

  • 김귀자;박재주
    • Environmental Analysis Health and Toxicology
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    • v.4 no.1_2
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    • pp.11-17
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    • 1989
  • A quantitative analytical method of highly concentrated PCB is established in the research. With the quantitative analytical method PCB of insulating oil was examined. The following conclusions are derived from this research. 1. The recovery ratio was 95.7% with the quantitative analytical method, which indicates it can be used for the analysis of PCB. 2. PCB concentration of insulation oil in waste condenser was found to be 21.2% thru 13.85% , which was highly concentrated. 3. PCB insulation oil in waste condenser was same as PCB-42.

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Quantitative Determination of Styrene in Blood and Mandelic Acid in Urine of the Occupationally Styrene-exposed Workers

  • Yang, Jeong-Sun
    • Archives of Pharmacal Research
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    • v.17 no.2
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    • pp.76-79
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    • 1994
  • The concentration of styrne in blood of the occupationally syrene-exposed workers was checked by gas chromatographic headspace analysis. Mandelic acd in urine, that is a major metabolite of styrene, and hippuric acid wre also analyzed by high performance liquid chromatography. For the biological monitoring of styrene-exposed workers, the routine method of the quantitative determination of styrene nad its metabolites in the biolgical samples were studied.

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A Research on the Trend of Quantitative Research through the Analysis of Master's and Doctoral Dissertations of Information Literacy (정보활용능력 분야 학위논문 분석을 통한 양적 연구 동향에 관한 연구)

  • Seo, Man-Deok;Nam, Young-Joon
    • Journal of the Korean Society for information Management
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    • v.27 no.4
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    • pp.309-328
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    • 2010
  • This study has analyzed the trend of the quantitative research by analyzing domestic dissertations on information literacy that were published since 2000. The procedures, regulations, and descriptive elements of the quantitative study were compared and analyzed for this study. In addition, the study used 5 variables and criterions to measure these items. Based on the calculations, the study has examined the general characteristics of the thesis, research method, sampling method and sampling population of the dissertations. The study has also analyzed the trend of the measurement variables by categorizing the characteristics by published year and majors. Furthermore, the study has also presented the trend of the usage of statistic analysis method on research purpose by classifying the method into each purpose.

Establishing the Supplementary Quantitative Guidelines for Successful Establishment of NRF Grant Funding Mechanism on Basic Research (한국형 그랜트 지원방식 도입에 따른 선정평가 효율화를 위한 정량적 가이드라인 수립에 관한 연구)

  • Seo, Ok-Ee;Park, Kwisun;Shin, Suk Kyung;Lee, Sung Jong;Rhie, Won Geun;Lee, Yun Hee
    • Journal of Korea Technology Innovation Society
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    • v.16 no.2
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    • pp.424-443
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    • 2013
  • National Research Foundation of Korea (NRF) provides underpinning to boost international and domestic competitiveness in basic science and engineering (S&E) research. In 2012, NRF came up with the idea about implementing koreanized grant funding system and a NRF grant funding mechanism on basic research was applied to General Researcher program. The main components of the mechanism are 1) no final evaluation, instead intensive evaluation for next proposal submission, 2) no paper account report, instead reporting it online, 3) no lengthy final report, instead unloading a brief overview of research achievements. For successful establishment of the NRF grant funding mechanism, the quality and quantity-based quantitative guidelines of research achievement for various research areas are essential. In this study, we suggest 3 quantitative indexes and these quantitative guidelines provides a supplementary tool for researcher's capability review. These guidelines will be also useful to elevate the reliability and objectivity of peer review.

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Benchmark Dose Modeling of In Vitro Genotoxicity Data: a Reanalysis

  • Guo, Xiaoqing;Mei, Nan
    • Toxicological Research
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    • v.34 no.4
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    • pp.303-310
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    • 2018
  • The methods of applied genetic toxicology are changing from qualitative hazard identification to quantitative risk assessment. Recently, quantitative analysis with point of departure (PoD) metrics and benchmark dose (BMD) modeling have been applied to in vitro genotoxicity data. Two software packages are commonly used for BMD analysis. In previous studies, we performed quantitative dose-response analysis by using the PROAST software to quantitatively evaluate the mutagenicity of four piperidine nitroxides with various substituent groups on the 4-position of the piperidine ring and six cigarette whole smoke solutions (WSSs) prepared by bubbling machine-generated whole smoke. In the present study, we reanalyzed the obtained genotoxicity data by using the EPA's BMD software (BMDS) to evaluate the inter-platform quantitative agreement of the estimates of genotoxic potency. We calculated the BMDs for 10%, 50%, and 100% (i.e., a two-fold increase), and 200% increases over the concurrent vehicle controls to achieve better discrimination of the dose-responses, along with their BMDLs (the lower 95% confidence interval of the BMD) and BMDUs (the upper 95% confidence interval of the BMD). The BMD values and rankings estimated in this study by using the EPA's BMDS were reasonably similar to those calculated in our previous studies by using PROAST. These results indicated that both software packages were suitable for dose-response analysis using the mouse lymphoma assay and that the BMD modeling results from these software packages produced comparable rank orders of the mutagenic potency.

Artificial Neural Network for Quantitative Posture Classification in Thai Sign Language Translation System

  • Wasanapongpan, Kumphol;Chotikakamthorn, Nopporn
    • 제어로봇시스템학회:학술대회논문집
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    • 2004.08a
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    • pp.1319-1323
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    • 2004
  • In this paper, a problem of Thai sign language recognition using a neural network is considered. The paper addresses the problem in classifying certain signs conveying quantitative meaning, e.g., large or small. By treating those signs corresponding to different quantities as derived from different classes, the recognition error rate of the standard multi-layer Perceptron increases if the precision in recognizing different quantities is increased. This is due the fact that, to increase the quantitative recognition precision of those signs, the number of (increasingly similar) classes must also be increased. This leads to an increase in false classification. The problem is due to misinterpreting the amount of quantity the quantitative signs convey. In this paper, instead of treating those signs conveying quantitative attribute of the same quantity type (such as 'size' or 'amount') as derived from different classes, here they are considered instances of the same class. Those signs of the same quantity type are then further divided into different subclasses according to the level of quantity each sign is associated with. By using this two-level classification, false classification among main gesture classes is made independent to the level of precision needed in recognizing different quantitative levels. Moreover, precision of quantitative level classification can be made higher during the recognition phase, as compared to that used in the training phase. A standard multi-layer Perceptron with a back propagation learning algorithm was adapted in the study to implement this two-level classification of quantitative gesture signs. Experimental results obtained using an electronic glove measurement of hand postures are included.

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