http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Lo ̄pez-Mertz, Elsa M. 한국의학도서관협의회 1998 한국의학도서관협의회지 Vol.25 No.1
NLMC분류표는 의학 교육의 지원을 위한 자료들을 조직화 하기 위해서 개발된, 그리고 약학과 약물학을 포함하는 정보자료를 분류하기 위해서 미국에서 가장 널리 사용되었던 초기의 분류표들로부터 기본적인 아이디어를 사용해서 1946년에 개발되었다. 본 연구의 목적은 MLMC의 구조가 약제학적 문헌을 어떻게 적응시키고 그 타당성을 경정하는지를 검토하고자 하는 것이다. 필자는 서지적 기록을 가지고 1,979종의 단행본에 매겨진 NLMC분류번호를 분석하였다. 이 분석한 결과는 NLMC의 구조가 하위류(sub-class) QV701-835에 있어서 해당 문헌의 42%를 한데 모은 한편 나머지의 41%는 NLMC분류표 전체를 통해서 분산되는 것으로 나타났다. 추가로 17%는 LCC로 분류되었다.
Macrina Pe´rez-Lo´pez,Rodolfo Garcı´a-Contreras,Marcos Soto-Herna´ndez,Jose´ Salud Rodrı´guez-Zavala,Mariano Martı´nez-Va´zquez,Francisco Javier Prado-Galbarro,Israel Castillo-Jua´rez 한국식품영양과학회 2018 Journal of medicinal food Vol.21 No.4
Seed oils from oleaginous plants are rich in fatty acids (FAs) that play important roles in the health of the consumers. Recent studies indicate that FA also can play an important role in communication and regulation of virulence in bacteria. Nevertheless, evidence demonstrating protection against bacterial infections mediated by their quorum sensing inhibition (QSI) activity is scarce. In this study, sunflower, chia, and amaranth oils, were assayed for their QSI capacity by inhibiting violacein production and alkaline exoprotease activity of Chromobacterium violaceum. In vitro assays revealed that the oils exhibited QSI activities, whereas in vivo they delayed death of mice inoculated intraperitoneally with the bacterium. Gas chromatography coupled with mass spectrometry analysis of the oils indicated the presence of saturated FA (SAFA) and unsaturated FA as main components. Through a structure–activity relationship study of free FAs, bactericidal effect was identified mainly for polyunsaturated FAs, whereas QSI activity was restricted to SAFA of chains 12–18 carbon atoms in length. These data correlate with a possible interaction suggested by molecular docking analysis of lauric, myristic, and stearic acids with the CviR protein. Our study highlights the antiquorum sensing potential of SAFA, which may be future antivirulence therapeutic agents for the treatment of bacterial infections.
Soda Pulping of Sunflower Stalks. Influence of Process Variables on the Resulting Pulp
Lo´pez, F.,Eugenio, M.E.,Di´az, M.J.,Nacimiento, J.A.,Garci´a, M.M.,Jime´nez, L. 한국공업화학회 2005 Journal of Industrial and Engineering Chemistry Vol.11 No.3
This paper discusses the influence of independent variables in the pulping of sunflower stalks [viz. the effects that the alkali concentration (5~15%), anthraquinone concentration (0~0.1%), temperature (125~175℃), time (30~90 min), and the liquid/solid ratio (4~8) have on the yield, holocellulose content, lignin content, and kappa number of the resulting pulp]. By using a central composite factorial design, equations relating each dependent variable to the different independent variables were derived; they reproduced the experimental results for the dependent variables with errors less than 15%. The Kappa number values were reproduced with errors less than 19%. This study confirms the feasibility of applying a soda-anthraquinone pulping process to sunflower stalks. Using a short time, a low liquid/solid ratio, a high temperature and anthraquinone concentration, and a medium-to-high alkali concentration (13.9%), we obtained values for holocellulose, lignin, and kappa number that differ by less than 13.7, 14.9, and 20.1%, respectively, from the optimum values (viz. 97.8%, 3.9%, and 14.9, respectively). However, the yield is 36.1% lower than the optimum value (68.7%). These conditions provide a pulp having acceptable properties. According to the results, paper sheets can be obtained that have characteristics similar to those obtained using similar alternative raw materials, and considerable savings should occur on operating costs.
A.B. Lo´ pez,M.D. La Rubia,J.M. Navaza,R. Pacheco,D. Go´ mez-Dı´az 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.21 No.1
The carbon dioxide absorption process by 1-amino-2-propanol (MIPA) and bis(2-hydroxypropyl)amine(DIPA) aqueous solutions in bubble column reactor have been studied considering the influence of liquidphase physical properties and the amine group substitution on the overall process. Themain objective ofthis work was to establish the carbon dioxide capture reaction mechanism for these systems, and then toobtain the predominant stoichiometry to calculate the mass transfer coefficient. NMR technique wasused to determine the species present in the liquid phase during the absorption process and to confirmthe reaction mechanism. The degradation of these amines was also evaluated.
Ana L. Martı´nez-Lo´pez,Elizabeth Carvajal-Millan,Jorge Marquez-Escalante,Alma C. Campa-Mada,Agustı´n Rasco´n-Chu,Yolanda L. Lo´pez-Franco,Jaime Lizardi-Mendoza 한국식품과학회 2019 Food Science and Biotechnology Vol.28 No.2
Arabinoxylans (AX) gels at 4% (w/v) wereprepared using laccase (LAX gels) or peroxidase (PAXgels), and their cross-linking, rheological, structural, andspectroscopic characteristics were investigated. LAX gelspresented lower amount of 5,50-diferulic acid (11%),smaller mesh size (128 nm), and higher hardness (37 N)and elasticity (430 Pa) than the PAX gels (28%, 197 nm,7 N, and 120 Pa, respectively). Microscopy of the LAXgels showed linked strands, while the system was lessconnected in the PAX gels. The Raman band at 2895 cm-1of the LAX and PAX gels was less intense, indicatingenhanced hydrogen bonding compared to that of AX. Thisdecrease was less dramatic for the PAX gels. The greatercontent of 5,50-diferulic acid in PAX gels could favorintrachain bonds, affecting their rheological, structural, andspectroscopic characteristics. Laccase may be a betteroption than peroxidase for AX gelation intended for foodand biotechnological applications.
Transcriptional profile of processing machinery of 30 end of mRNA in Trichomonas vaginalis
Miguel A ´ ngel Del-Moral-Stevenel,Alma Villalobos-Osnaya,Mavil Lo´pez-Casamichana,Laura Itzel Quintas-Granados,Ce´sar Lo´pez-Camarillo,Jose´ Manuel Ferna´ndez Sa´nchez,Selene Zarate-Guerra,Marı´a Eli 한국유전학회 2015 Genes & Genomics Vol.37 No.4
Trichomonas vaginalis is the causative agent of trichomonosis, a sexually transmitted disease (STD) that affects over 180 million people worldwide. This parasite is capable to infect the urogenital tract of women and men, both microenvironments might affect the expression of key genes that may be involved in the parasite pathogenesis. The processing of 30 end of mRNA promotes mRNA stability in many eukaryotes, however in T. vaginalis this molecular machinery is under research. By means of an in silico analysis we identified putative proteins of the 30 end mRNA processing machinery of T. vaginalis, and by RTPCR assays we evaluated the expression of eight of these genes in a female and male T. vaginalis isolates. According to the in silico analysis, the T. vaginalis 30 end mRNA processing machinery, comprises a similar complex and protein factors that those described in Homo sapiens, Arabidopsis thaliana, Saccharomyces cerevisiae and Entamoeba histolytica. The complex contains several subcomplexes, including cleavage and polyadenylation specificity factor (CPSF), cleavage stimulation factor (CstF), cleavage factor I (CFIm) and cleavage factor II (CFIIm). We demonstrated that genes tvpsf2p, tvcfi25, tvcpsf160, tvcpsf73, tvfip1, tvpap1, tvpc4 and tvpabp are expressed in male or female T. vaginalis isolates. Besides we identify two different isoforms of TvPC4. T. vaginalis genome contains most of genes encoding for 30 end mRNA processing, which may be transcriptionally active and could be involved in the capping, splicing, cleavage and polyadenylation of mRNAs in this parasite. Further studies are necessary to elucidate the biological meaning of our findings.
Valentı´n Flores-Paya´n,Enrique J. Herrera-Lo´ pez,Javier Navarro-Laboulais,Alberto Lo´ pez-Lo´ pez 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.21 No.1
A computational model for a reactor used in advanced water treatment was proposed to represent,simulate and predict the mass transfer process of ozone in water (gas–liquid). A graphic interface wasdesigned to simulate the ozone gas transfer into the liquid. In addition, the values of the mass transfercoefficient, and the self-decomposition of ozone, could be determined for different initial conditions. Themodel for ozone mass transfer was represented by two differential equations derived from the massbalances of the system. Finally a sensitivity analysis wasmade to determine the effect of the parametersover the operating variables.
Oscar, Bajo-Rubio,Carmen, Lo´pez-Pueyo 세종대학교 국제경제연구소 2002 Journal of Economic Integration Vol.17 No.1
In this paper we analyze the main characteristic features of foreign direct investment(FDI) directed to Spanish manufacturing, both across industries and through time, for the years 1986-1992. During this period, Spain was one of the most important recipients of FDI inflows in the world, coinciding with the first years of integration into the European Union and the prospects about the completion of the Single European Market by 1992. To this end, a relative FDI measure is related to several industry indicators, as well as to some macro-economic variables, which allows us to obtain a general characterization of FDI in Spanish manufacturing over that period.
Melé,ndez-Ló,pez, Samuel G.,Herdman, Scott,Hirata, Ken,Choi, Min-Ho,Choe, Youngchool,Craik, Charles,Caffrey, Conor R.,Hansell, Elisabeth,Chá,vez-Munguí,a, Bibiana,Chen, Yen Tin American Society for Microbiology 2007 EUKARYOTIC CELL Vol.6 No.7
<B>ABSTRACT</B><P>Cysteine proteinases are key virulence factors of the protozoan parasite <I>Entamoeba histolytica</I>. We have shown that cysteine proteinases play a central role in tissue invasion and disruption of host defenses by digesting components of the extracellular matrix, immunoglobulins, complement, and cytokines. Analysis of the <I>E. histolytica</I> genome project has revealed more than 40 genes encoding cysteine proteinases. We have focused on <I>E. histolytica</I> cysteine proteinase 1 (EhCP1) because it is one of two cysteine proteinases unique to invasive <I>E. histolytica</I> and is highly expressed and released. Recombinant EhCP1 was expressed in <I>Escherichia coli</I> and refolded to an active enzyme with a pH optimum of 6.0. We used positional-scanning synthetic tetrapeptide combinatorial libraries to map the specificity of the P1 to P4 subsites of the active site cleft. Arginine was strongly preferred at P2, an unusual specificity among clan CA proteinases. A new vinyl sulfone inhibitor, WRR483, was synthesized based on this specificity to target EhCP1. Recombinant EhCP1 cleaved key components of the host immune system, C3, immunoglobulin G, and pro-interleukin-18, in a time- and dose-dependent manner. EhCP1 localized to large cytoplasmic vesicles, distinct from the sites of other proteinases. To gain insight into the role of secreted cysteine proteinases in amebic invasion, we tested the effect of the vinyl sulfone cysteine proteinase inhibitors K11777 and WRR483 on invasion of human colonic xenografts. The resultant dramatic inhibition of invasion by both inhibitors in this human colonic model of amebiasis strongly suggests a significant role of secreted amebic proteinases, such as EhCP1, in the pathogenesis of amebiasis.</P>
Tiago Felipe Senes-Lopes,Jorge Alberto Lo´pez,Viviane Souza do Amaral,Jose´ Branda˜o-Neto,Adriana Augusto de Rezende,Jefferson Roma´ryo Duarte da Luz,Zaira da Rosa Guterres,Maria das Grac¸as Almeida 한국식품영양과학회 2018 Journal of medicinal food Vol.21 No.4
Medicinal plants have been used in primary healthcare since the earliest days of humankind. Turnera subulata and Spondias mombin × Spondias tuberosa are widely used in the Brazilian Northeast to treat several diseases. The aim of this study was to evaluate the genotoxic effects of the leaf extracts of these species by the somatic mutation and recombination test in the somatic cells of Drosophila melanogaster wings. The experiments were performed using standard and high-bioactivation cross and three concentrations of the test substance [aqueous extract (AET and AES) at 5.0, 10.0, and 20.0 mg/mL and ethanolic extract (EET and EES) and ethyl acetate fraction (EAFT and EAFS) at 0.625, 1.25, and 2.5 mg/mL]. Results indicated that the extracts and fractions induced spontaneous frequencies of mutant spots in both D. melanogaster crosses. Nevertheless, the highest concentrations of the tested plant chemical agents were responsible for the statistically significant genotypic effect. T. subulata and S. mombin × S. tuberosa displayed genotoxic effect under the experimental conditions. The results from this study are crucial as they indicated the deleterious and side effects, considering the indiscriminate use of the extracts of these plants for disease treatment.