• 제목/요약/키워드: excess

검색결과 4,306건 처리시간 0.027초

Dielectric Study of Allyl Chloride with 2-Pentanone and 2-Hexanone in Microwave Frequency Range

  • Sudake, Yuvraj;Kamble, Siddharth;Maharolkar, Aruna;Patil, Sunil;Khirade, Prakash;Mehrotra, Suresh
    • Bulletin of the Korean Chemical Society
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    • 제33권10호
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    • pp.3423-3426
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    • 2012
  • Dielectric measurement on binary mixtures of Allyl chloride (ALC) with 2-Pentanone (2-PE) and 2-Hexanone (2-HE) has been carried out over the entire concentration range using Time Domain Reflectometry (TDR) technique at various temperatures in microwave frequency range of 10 MHz to 10 GHz. The static dielectric constant, excess static dielectric constant (${\varepsilon}^E_S$), effective Kirkwood correlation factor ($g^{eff}$) of binary mixtures over entire concentration range were determined to study the effect of increasing alkyl group of ketones on hetero molecular interaction. It was found that magnitude of excess static dielectric constant of mixtures increases with increase of alky group of ketones. The study reveals that the dipole moment of Allyl chloride in mixture have antiparallelism tendency where as 2-pentanone and 2-hexanone have parallelism tendency. Excess static dielectric constant is also fitted to Redlich-Kister equation to get information about rates of multimers formation.

IMAGING NON-THERMAL X-RAY EMISSION FROM GALAXY CLUSTERS: RESULTS AND IMPLICATIONS

  • HENRIKSEN MARK;HUDSON DANNY
    • 천문학회지
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    • 제37권5호
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    • pp.299-305
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    • 2004
  • We find evidence of a hard X-ray excess above the thermal emission in two cool clusters (Abell 1750 and IC 1262) and a soft excess in two hot clusters (Abell 754 and Abell 2163). Our modeling shows that the excess components in Abell 1750, IC 1262, and Abell 2163 are best fit by a steep power law indicative of a significant non-thermal component. In the case of Abell 754, the excess emission is thermal, 1 ke V emission. We analyze the dynamical state of each cluster and find evidence of an ongoing or recent merger in all four clusters. In the case of Abell 2163, the detected, steep spectrum, non-thermal X-ray emission is shown to be associated with the weak merger shock seen in the temperature map. However, this shock is not able to produce the flatter spectrum radio halo which we attribute to post-shock turbulence. In Abell 1750 and IC 1262, the shocked gas appears to be spatially correlated with non-thermal emission suggesting cosmic-ray acceleration at the shock front.

Human Health Risk Assessment Due to Air Pollution in the Megacity Mumbai in India

  • Maji, Kamal Jyoti;Dikshit, Anil Kumar;Chaudhary, Ramjee
    • Asian Journal of Atmospheric Environment
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    • 제11권2호
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    • pp.61-70
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    • 2017
  • This study evaluated the human health risk in terms of the excess number of mortality and morbidity in the megacity Mumbai, India due to air pollution. AirQ software was used to enumerate the various health impacts of critical pollutants in Mumbai in past 22 years during 1992-2013. A relationship concept based on concentration-response relative risk and population attributable-risk proportion was employed by adopting World Health Organization (WHO) guideline for concentrations of air pollutants like $PM_{10}$, $SO_2$ and $NO_2$. For the year 1992 in Mumbai, it was observed that excess number of cases of total mortality, cardiovascular mortality, respiratory mortality, hospital admission due to COPD, respiratory disease and cardiovascular disease were 8420, 4914, 889, 149, 10568 and 4081 respectively. However, after 22 years these figures increased to 15872, 9962, 1628, 580, 20527 and 7905 respectively, but all of these reached maximum in the year 2006. From the result, it is also noted that except COPD morbidity the excess number of cases from 1992-2002 to 2003-2013 increased almost by 30%; and the excess number of mortality and morbidity is basically due to particulate matter ($PM_{10}$) than due to gaseous pollutants.

지표면 임피던스에 의한 소음의 초과감쇠에 관한 연구 (Effects of the Finite Ground Impedance on the Excess Attenuation of Noise)

  • 김동일;강병용;장호경;김예현
    • 한국음향학회지
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    • 제13권5호
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    • pp.5-14
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    • 1994
  • 본 연구에서는 초지, 흙으로 된 표면, 아스팔트, 시멘트도로 등의 지표면 위의 자유공간에서 정상파 방법을 이용하여 음향 임피던스를 측정하였으며, 음의 초과감쇠를 조사하였다. 사용한 주파수의 범위는 300Hz에서 1000Hz이며, 각 지표면의 음향 임피던스를 측정한 결과 Delany와 Bazley의 이론식과 비교적 잘 일치하였다. 음향임피던스는 초지, 흙, 아스팔트, 시멘트도로의 순으로 커지고, 주파수가 증가하면 그 값은 감소한다. 음의 초과감쇠는 주로 음향임피던스에 의해 좌우됨을 확인하였으며, 각 지표면과 마이크로폰의 높이에 따른 이론치와 실험결과를 비교하였다.

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한방 피부 진액 변증론 연구 (study on pattern identification about fluid-humor of skin in Oriental Medicine)

  • 김경신;조가영;김덕희;김병수
    • 혜화의학회지
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    • 제19권2호
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    • pp.35-42
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    • 2011
  • The purpose of this study is to evaluate the difference about pathogenesis of skin type. the theory that explains each individual react to certain stress is generally accepted in traditional oriental medicine. The aim of this experiment is to find out relationship between the effect of facial condition and the vital conditions of traditional Oriental medicine. We recognized that pattern identification of fluid-humor could be divided into 4 different groups. The reason is that the fluid-humor could be interpreted as Qi & Blood, furthermore Qi & Blood were categorized into deficiency and excess groups. Korean female volunteers in good health participated in this experiment. Three doctors of Oriental medicine classified them into 4 groups based on qi-blood and deficiency-excess concept(qi-deficiency; qi-excess:qi-stagnation; blood-deficiency; blood-excess:static-blood). Volunteers were assessed with non-invasive skin measuring devices. And we analyzed the correlation of skin physiological parameters with vital conditions; moisture, sebum and elasticity. Measurement moisture and sebum of facial skin tended to deacease only in static blood group.

Case-control Study of Risk Factors for Non-Hodgkin Lymphoma in Mumbai, India

  • Balasubramaniam, Ganesh;Saoba, Sushama;Sarade, Monika;Pinjare, Suvarna
    • Asian Pacific Journal of Cancer Prevention
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    • 제14권2호
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    • pp.775-780
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    • 2013
  • Background: In the year 2010, it is estimated that nearly 0.36 million new cases and 0.19 million deaths with Non-Hodgkin lymphoma occurred. In India, among males, NHL incidence rates vary across the country which has encouraged us to conduct a case-control study to study risk factors. Materials and Methods: The present unmatched hospital-based case-control study conducted at Tata Memorial Hospital included subjects registered between the years 1997-99. There were 390 'lymphoma cases' and 1,383 'normal controls. Results: Data on age, tobacco habits, occupational history, dietary factors, tea, coffee were collected by the social investigators. Univariate and multivariate methods were applied for obtaining the odds ratios for risk factors. Conclusions: In the study, cigarette smoking (OR=2.0) and bidi smoking (OR=2.8), were associated with excess risk of lymphoma. Among the dietary items, only consumption of mutton showed 7.3-fold significant excess risk for lymphoma. Consumption of milk showed a 6-fold excess risk (OR=1.5); while coffee showed a 50% reduction in risk for lymphoma. Among occupational exposure, exposure to use of pesticides showed 3-fold excess risk for lymphoma.

동역학계수 및 물질수지를 이용한 OSA공정의 잉여슬러지 감량능 평가 (Evaluation of Excess Sludge Reduction in the OSA Process using Kinetic Parameter and Mass Balance)

  • 남덕현;장형석;하금률;김준규;주재영;정인호;박철휘
    • 한국물환경학회지
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    • 제25권4호
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    • pp.530-538
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    • 2009
  • The Oxic-Settling-Anaerobic (OSA) treatment process, a modified Conventional Activated Sludge (CAS) process, was developed for the purpose of sludge reduction. The insertion of a sludge holding tank into a sludge return line, an anaerobic reactor, forming an OSA process, may provide a cost-effective way of reducing excess sludge production during a process. The OSA process was evaluated for its sludge reduction ability by kinetic parameter and mass balance, with an observed excess sludge reduction of 63.5%, as $P_{X.VSS}$, compared with the conventional activated sludge process.

InBO3:Tb 형광체의 발광 특성 (Luminescence of InBO3:Tb Phosphor)

  • 이제혁;이태희;서광석;류선윤;변재동
    • 한국전기전자재료학회논문지
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    • 제19권8호
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    • pp.744-748
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    • 2006
  • Emission characteristics of terbium-activated $InBO_3$ under cathode-ray(c.r.) and vacuum ultra violet(v.u.v.) irradiation have been investigated as a functions of norminal compositions and firing conditions. From the x-ray analysis, it was found that some of the synthesized samples contained excess $In_2O_3$ and the amount of the excess $In_2O_3$ varied with the norminal composition and heat treatment conditions. The samples with remanent excess $In_2O_3$ showed lower luminescence intensities than the ones free of excess $In_2O_3$. The phosphors of norminal composition of $InBO_3+10mol%B_2O_3:2mol%Tb$ synthesized at $1250^{\circ}C$ showed excellent CL and PL properties.

3-Acyl-4(S)-isopropyl-1,3-Thiazolidine-2-Thione과 라세미아민의 입체선택적인 반응 (A Highly Stereoselective Reaction in Aminolysis of 3-Acyl-4-(S)-isopropyl-1,3-thiazolidine-2-thione with Racemic Amines)

  • 정태명;박기훈
    • 대한화학회지
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    • 제32권6호
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    • pp.588-592
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    • 1988
  • 키랄 보조제가 붙어있는 3-acyl-4(S)-isopropyl-1,3-thiazolidine-2-thione[4(S)-AITT]을 라세미 아민과 가아민 분해반응을 시켰을때 광학활성을 갖는 아미드(S-excess)와 아민(R-excess)이 얻어지는 입체 선택적인 반응이 관찰되었다. 이와같은 입체 선택적인 반응은 macrocyclic diamide, macrocylic sperimidine alkaloid, peptide 합성에 이용될 수 있다. 가아민 분해반응의 속도는 아민의 입체적인 영향을 많이 받았고 반응이 종료점은 노락색의 소실로 쉽게 관찰되었다. 4(S)-AITT는 4(S)-isopropyl-1,3-thiazolidine-2-thione과 carboxylic acid로부터 얻었다.

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한열허실변증(寒熱虛實辨證)을 이용한 비정격(脾正格) 적응증 고찰 (A Literature Study on the Application of Spleen Tonifying Sa-Am Acupuncture in the Diagnosis of Cold-Heat & Deficiency-Excess)

  • 최준수;임윤경
    • Journal of Acupuncture Research
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    • 제23권5호
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    • pp.31-37
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    • 2006
  • Objectives & Methods : We investigated the cases for which spleen tonifying Sa-Am acupuncture was applied in ${\ulcorner}$Sa-Am-chim-gu-jeong-jeon(舍巖鍼灸正傳)${\lrcorner}$ and classified them according to the concepts of cold-heat & deficiency-excess for a better understanding of the application of spleen tonifying Sa-Am acupuncture. Results : 1. Tonification of Spleen Sa-Am acupuncture can be used to treat heat syndromes such as deficient fire caused by collapse of the spleen qi, stagnation of evil qi or spleen yin deficiency, by way of tonifying spleen qi, activating the flow of qi and blood or harmonizing spleen yin and yang. 2. Tonification of Spleen Sa-Am acupuncture can be used to treat cold syndromes such as weakness of spleen yang by way of promoting fire to generate earth, strengthening spleen yang and raising the clear yang. 3. Tonification of Spleen Sa-Am acupuncture can be used to treat deficiency syndromes such as malnutrition or poor appetite caused by spleen deficiency by way of tonifying spleen qi. 4. Tonification of Spleen Sa-Am acupuncture can be used to treat excess syndromes such as stagnation of qi and blood, abdominal mass or toxication by way of tonifying spleen qi and promoting the flow of qi and blood.

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