• Bulletin of the Korean Chemical Society
• /
• 제12권1호
• /
• pp.87-92
• /
• 1991

A dual capillary column system is described for the simultaneous measurement of retention index (RI) and area ratio (AR) values of each peak on two capillary columns of different polarity, DB-5 & DB-1701. Both capillary columns were connected to a common splitless injector via a deactivated fused-silica capillary tubing of 1 m length and a 'Y' splitter, the dead volume effect of which was found to be negligible. RI and AR were measured with high reproducibility(${\leq}$0.05% RSD) and with high accuracy (<10% RE), respectively. When applied to the test samples of the organic acid mixture, each acid was positively identified by the combined computer RI library search-AR comparison.

• Bulletin of the Korean Chemical Society
• /
• 제21권9호
• /
• pp.860-866
• /
• 2000

Hydrocarbostyril, which is a key intermediate in our new synthetic route to 6-nitroquipazine, can be prepared from 1-indanone oxime by Beckmann rearrangement. We have optimized the reaction by using a Lewis acid, aluminum chloride,in the yield of 91% instead of common acids such as polyphosphoric acid,and sulfuric acid used in conventional Beckmann rearrangement (20% in the literature, 10% in our experiment).The optimized condition is established by usingthree equivalents of aluminum chloride in CH2Cl2 at -40 $^{\circ}C$ - room tempera-turefor 40 min. We have applied this condition to other 1-indanone derivatives, such as 4-methyl-, 4-methoxy-, 4-nitro and 6-nitro-1-indanones. The mechanism ofthis BR has been proposed on the basis of the effect of tem-perature and substituenton product ratio, with the aid of PM3 calculation for a model system.

• Asian-Australasian Journal of Animal Sciences
• /
• 제27권2호
• /
• pp.187-193
• /
• 2014

As a result of the cost of grains, the replacement of grains by co-products (i.e. DDGS) in feedlot diets is a common practice. This change produces diets that contain a lower amount of starch and greater amount of fibre. Hypothetically, combining feed grade urea (U) with slow release urea (Optigen) in this type of diet should elicit a better synchrony between starch (high-rate of digestion) and fibre (low-rate of digestion) promoting a better microbial protein synthesis and ruminal digestion with increasing the digestible energy of the diet. Four cannulated Holstein steers ($213{\pm}4$ kg) were used in a $4{\times}4$ Latin square design to examine the combination of Optigen and U in a finishing diet containing different starch:acid detergent fibre ratios (S:F) on the characteristics of digestive function. Three S:F ratios (3.0, 4.5, and 6.0) were tested using a combination of U (0.80%) and Optigen (1.0%). Additionally, a treatment of 4.5 S:F ratio with urea (0.80% in ration) as the sole source of non-protein nitrogen was used to compare the effect of urea combination at same S:F ratio. The S:F ratio of the diet was manipulated by replacing the corn grain by dried distillers grain with solubles and roughage. Urea combination did not affect ruminal pH. The S:F ratio did not affect ruminal pH at 0 and 2 h post-feeding but, at 4 and 6 h, the ruminal pH decreased as the S:F ratio increased (linear, p<0.05). Ruminal digestion of OM, starch and feed N were not affected by urea combination or S:F ratio. The urea combination did not affect ADF ruminal digestion. ADF ruminal digestion decreased linearly (p = 0.02) as the S:F ratio increased. Compared to the urea treatment (p<0.05) and within the urea combination treatment (quadratic, p<0.01), the flow of microbial nitrogen (MN) to the small intestine and ruminal microbial efficiency were greater for the urea combination at a S:F ratio of 4.5. Irrespective of the S:F ratio, the urea combination improved (2.8%, p = 0.02) postruminal N digestion. As S:F ratio increased, OM digestion increased, but ADF total tract digestion decreased. The combination of urea at 4.5 S:F improved (2%, p = 0.04) the digestible energy (DE) more than expected. Combining urea and Optigen resulted in positive effects on the MN flow and DE of the diet, but apparently these advantages are observed only when there is a certain proportion of starch:ADF in the diet.

• 대한한의학방제학회지
• /
• 제12권2호
• /
• pp.77-93
• /
• 2004

Depression is a sort of mental disorder which is very common. To treat depression, many drugs such as TCA, MAOI are developed and used. But they have a lot of side effects, so it needs to develop drugs without side effects or with less side effects. Herbal medicines have been used to treat diseases not only physical but also mental and have less side effects. therefore, it has been thoght the need to develop herbal medicine with antidepressant effect. The purpose of this study was to reseach antidepressant effect and influence on monoamines of chunwangboshimdan thought to have antidepressant according to ancient medical book- donguibogam- and recent reports. We used 'forced swimming test(FST)' to know antidepressant effect of chunwangboshimdan and HPLC to check the influence on monoamines and their metabolites(norepinephrine, dopamine, DOPAC, HVA, serotonin, 5-HIAA) of chunwangboshimdan after divided into cerebral cortex, striatum, hypothalamus and hippocampus. The results were obtained as follows: In the study of antidepressant effect by 'forced swimming test(FST)'method, chunwang boshimdan had a significant antidepressant effect. In the study of influence on monoamines by HPLC, chunwangboshimdan mainly increased dopamine among monoamines and their metabolites(norepinephrine, dopamine, DOPAC, HVA, serotonin, 5-HIAA) significantly in 4 parts of rat's brain above-mentioned. Calculated by turnover ratio formulae of monoamine, chunwangboshimdan has more results than Imipramine. These results suggest that chunwangboshimdan has antidepressant effect that is related with the increase of monoamines by suppressing their metabolism as its mechanism.

• Structural Engineering and Mechanics
• /
• 제16권6호
• /
• pp.675-693
• /
• 2003

In order to consider the modified seismic response of framed structures in the presence of masonry infills, proper models have to be formulated. Because of the complexity of the problem, a careful definition of a diagonal pin-jointed strut, able to represent the horizontal force-interstorey displacement cyclic law of the actual infill, may be a solution. In this connection the present paper shows a generalized criterion for the determination of the ideal cross-section of the strut mentioned before. The procedure is based on the equivalence between the lateral stiffness of the actual infilled frame scheme during the conventional elastic stage of the response and the lateral stiffness of the same frame stiffened by a strut at the same stage. Unlike the usual empirical approaches available in the literature, the proposed technique involves the axial stiffness of the columns of the frame more than their flexural stiffness. Further, the influence of the bidimensional behaviour of the infill is stressed and, consequently, the dependence of the dimensions of the equivalent pin-jointed strut on the Poisson ratio of the material constituting the infill is also shown. The proposed approach is extended to the case of infills with openings, which is very common in practical applications.

• The Journal of Asian Finance, Economics and Business
• /
• 제7권6호
• /
• pp.109-116
• /
• 2020

The study examines the nexus between financial development and economic growth in India during Q1: 1996 to Q3: 2018. This study employs time-series data of real GDP and ratio of broad money to GDP as a proxy for economic and financial development, respectively. The data are obtained from RBI database on the Indian economy. All variables are seasonally adjusted using X12-arima technique and expressed in natural logarithm form. Non-linear Autoregressive Distributed Lag (NARDL) bound test has been used to check for cointegrating relationship of these two variables. Empirical findings suggest that, unlike in the short run, in the long run financial development does impact economic growth positively. Further, a symmetric effect of positive and negative components of financial development is found for the Indian economy, whereas the effect of control variable like exchange rate and trade openness is in consonance with common economic intuition. Exchange rate is in consonance with intuitive economic logic that a fall in exchange rate makes exports cheaper and increases the quantity of export, which improves the balance of payment and leads to a rise in aggregate demand, hence improves economic growth. This paper contributes to the existing literature on India by breaking down financial indicator into positive and negative components to examine the finance-growth relationship.

• 천문학회지
• /
• 제49권3호
• /
• pp.65-71
• /
• 2016

We obtain the first complete CCD light curves (LCs) of the contact binary AP UMi in the VRI bands and analyzed them by means of the PHOEBE code. A spotted model is applied to treat the asymmetry in the LCs. The LC morphology clearly shows the O'Connell effect and the solution shows an influence of star spots on both components. Such effect of star spots is common between the RS CVn and W UMa chromospherically active stars. Based on the obtained solution of the LCs we investigate the evolutionary state of the components and conclude that the system is a pre-intermediate contact binary (f = 0.29) with mass ratio q = 0.38, and it is an A-type W UMa system where the less massive secondary component is cooler than the more massive primary one.

• 대한한방소아과학회지
• /
• 제16권2호
• /
• pp.199-213
• /
• 2002

We have surveyed the epidemiology of functional dyspepsia in 7 cases of Children and investigated the therapeutic effect on Functional Dyspepsia following 4 weeks medication of Naesowhajung-tang using Electrogastrogram. The Results were as followings: 1. Sex ratio are 6 males, 1 female; their mean ages, $9.0{\pm}1.41(7-11years)$; length, $137.2{\pm}13.86cm$; body weight, $35.3{\pm}l1.34kg$. 2. Most of subjects have a normal growth state. But one case have severe growth disturbance. Familial tendency for this disease is noted in 85.8%. 3. Abdominal pain was seen in 100% of subjects. The indicated symptom was lowed in order of abdominal pain(100%), nausea vomiting(71.43%), general fatigue(65.34%), vertigo headache(57.14%), belching(55.38%), etc. 4. The EGG finding after treatment was improved in 53%, aggrevated in 43. In cases, postprandial improvement was more remarkable than fasting improvement. Common cold and antibiotics seems to have functioned as an aggrevating factor on gastric motility. From the above results, Naesowhajung-tang seems to have been used in the treatment of functional dyspepsia for children.

• 한국연소학회지
• /
• 제16권4호
• /
• pp.1-7
• /
• 2011

The purpose of this study was to analyze the effect of pilot injection strategy on the combustion and emissions characteristics in a four cylinder common-rail direct injection diesel engine fueled with biodiesel(soybean oil) blend. The tested fuel was mixed of 20% biodiesel and 80% ULSD(Ultra low sulfur diesel) by volume ratio. The experiments were performed under two load conditions, and results were compared with those of single injection. The experimental results showed that the ignition delay of BD20 was shorter than compared to that of ULSD in the case of low load condition. Also, the fuel consumption of BD20 was more higher than that of ULSD. Fuel consumption by applied pilot injection strategy were generally decreased compared with that of single injection. In the case of pilot injection, the exhaust emissions such as CO and HC emissions were decreased compared to the single injection.

• 복식문화연구
• /
• 제9권6호
• /
• pp.855-871
• /
• 2001

The purposes of this study were to compare the marketing compose elements of Apgujung and Shinchon branch of Hyundai Department Store and to suggest desirable fashion marketing strategies for other Department Stores and retailing stores. The results were as follows: Two kinds of factor were classified form this study; one was Hardware elements such as Trading Area Site, Store Composition, Scale, and Subsidiary facilities etc., another was Software elements like Store Concept, Image, and Merchandising and so on. The followings were suggested from Hardware elements; 1) Trading Area could be classified'local type'and 'spread type'. 2) Each branch was differentiated from store formation of conventional department store which had food department in basement. There were the most powerful women's fashion brand to lead costumers in second basement. 3) In accordance with the position of subsidiary facilities of Hyundai Department Store,'Water Jet Effect'strategy and'Show Effect'strategy could be usefully applied for other Department Stores and retailing stores. 4) The strategy of approaching easily to the target floor which was located in lower floor, could be applied to various retailing stores. The followings were suggested from Software elements; 1) Stores management coping with poles-apart in costumer could be needed to other Department Store and retailing stores. 2) It also could be needed to find and maintain effective ratio between common brand and differentiated brands in the other Department Stores.