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A Structural Case for International Cooperation
Correa, Amelia,Correa, Romar 세종대학교 국제경제연구소 2003 Journal of Economic Integration Vol.18 No.2
We recommend a Bretton Woods system along structural lines. A key component of the case is the substitution of the money transmission mechanism by the credit transmission mechantsm. We suggest that the real exchange rate be the variable of cooperation between countries that are free to set interest rates to pursue domestic policy objectives.
A Structural Case for International Cooperation
( Amelia Correa ),( Romar Correa ) 세종대학교 경제통합연구소 (구 세종대학교 국제경제연구소) 2003 Journal of Economic Integration Vol.18 No.2
We recommend a Bretton Woods system along structural lines. A key component of the case is the substitution of the money transmission mechanism by the credit transmission mechanism. We suggest that the real exchange rate be the variable of cooperation between countries that are free to set interest rates to pursue domestic policy objectives.
Resistance to Hypoosmotic Shock of Liposomes Containing Novel Pigments from an Antarctic Bacterium
Correa-Llanten, Daniela N.,Amenabar, Maximiliano J.,Blamey, Jenny M. The Korean Society for Microbiology and Biotechnol 2012 한국미생물·생명공학회지 Vol.40 No.3
Although the antioxidant capacity of carotenoids and their role in regulating membrane fluidity have been well studied, their ability to confer resistance to hypoosmotic shock is poorly understood. In this work, we analyzed the effect of a mixture of carotenoid pigments obtained from an Antarctic microorganism belonging to the genus Pedobacter on liposomal resistance to hypoosmotic conditions. Intercalation of pigments into liposomal structures resulted in an improvement of membrane resistance by decreasing the percentage of calcein released in comparison to that by liposomes without pigments. Due to these properties, such pigments could be useful for biotechnological applications.
Resistance to Hypoosmotic Shock of Liposomes Containing Novel Pigments from an Antarctic Bacterium
( Correa Llanten ),( Daniela N. ),( Maximiliano J. Amenabar ),( Jenny M. Blamey ) 한국미생물생명공학회(구 한국산업미생물학회) 2012 한국미생물·생명공학회지 Vol.40 No.3
Although the antioxidant capacity of carotenoids and their role in regulating membrane fluidity have been well studied, their ability to confer resistance to hypoosmotic shock is poorly understood. In this work, we analyzed the effect of a mixture of carotenoid pigments obtained from an Antarctic microorganism belonging to the genus Pedobacter on liposomal resistance to hypoosmotic conditions. Intercalation of pigments intoliposomal structures resulted in an improvement of membrane resistance by decreasing the percentage of calcein released in comparison to that by liposomes without pigments. Due to these properties, such pigments could be useful for biotechnological applications.
Financial Policy Coordination in a Keynesian Framework
Correa, Romar 세종대학교 국제경제연구소 1997 Journal of Economic Integration Vol.12 No.1
We propose a simple framework within which to examine the problem of policy coordination between two central banks. The context is the various components of a broad measure of the money supply. Consider two central banks, one 'monetarist' and the other 'Keynesian'. In each economy there is 'involuntary unemployment' of loans. It is shown that the monetary authorities can strategically vary short-term interest rates in order to relax the constraint in the loan market so that none of the players is worse off. Both the banks play a zero-sum game with regard to foreign exchange reserves. Here too, the central banks can, via their influence on prices, increase the profits of firms providing thereby a credible signal to banks(JEL Classification: E12, E61, F42)
( Correa Llanten Daniela ),( Juanita Larrain Linton ),( Patricio A Munoz ),( Miguel Castro ),( Freddy Boehmwald ),( Jenny M Blamey ) 한국미생물생명공학회(구 한국산업미생물학회) 2013 한국미생물·생명공학회지 Vol.41 No.3
A gram-positive, rod-shaped, spore-forming, motile thermophilic bacterium was isolated from a sterilization oven. The microorganism GWE1, formally named Geobacillus wiegelii identified as a member of the genus Geobacillus. GWE1 grew under aerobic conditions of between 60-80ºC (optimum 70ºC), in a pH range of 3.0-8.0 (optimum pH70ºC 5.8), and between 0 and 2 M NaCl (optimum 0.3 M). The membrane polar lipids were dominated by branched saturated fatty acids, which included as the major constituents; iso-15:0 (13.3%), 16:1(ω7) (12.8%), 16:0 (28.5%), iso-17:0 (13.5%) and anteiso-17:0 (12.3%). The DNA G+C content was 47.2 mol% (determined by HPLC). The 16S rRNA gene sequence of GWE1 showed a high similarity with Geobacillus caldoxylosilyticus (97%). However, the level of DNA?DNA relatedness was only 58%. These data suggest that GWE1 is probably a novel specie of the genus Geobacillus.
Anticancer Properties of Psidium guajava - a Mini-Review
Correa, Mariana Goncalves,Couto, Jessica Soldani,Teodoro, Anderson Junger Asian Pacific Journal of Cancer Prevention 2016 Asian Pacific journal of cancer prevention Vol.17 No.9
Cancer is a complex disease caused by a progressive accumulation of multiple genetic mutations. Consumption of fruits is associated with lower risk of several cancers, which is mainly associated to their phytochemical content. The use of functional foods and chemopreventive compounds seems to contribute in this process, acting by mechanisms of antioxidant, anti-inflammatory, anti-angiogenic and hormonal. The Psidium Guajava has high potential functional related to pigments who are involved in the process of cancer prevention by having antioxidant activity. The aim of the present review is to expose some chemical compounds from P. Guajava fractions and their association with anti-carcinogenic function. The evidences supports the theory of anticancer properties of P. Guajava, although the mechanisms are still not fully elucidated, but may include scavenging free radicals, regulation of gene expression, modulation of cellular signalling pathways including those involved in DNA damage repair, cell proliferation and apoptosis.
BRAIN: A bivariate data-driven approach to damage detection in multi-scale wireless sensor networks
Kijewski-Correa, T.,Su, S. Techno-Press 2009 Smart Structures and Systems, An International Jou Vol.5 No.4
This study focuses on the concept of multi-scale wireless sensor networks for damage detection in civil infrastructure systems by first over viewing the general network philosophy and attributes in the areas of data acquisition, data reduction, assessment and decision making. The data acquisition aspect includes a scalable wireless sensor network acquiring acceleration and strain data, triggered using a Restricted Input Network Activation scheme (RINAS) that extends network lifetime and reduces the size of the requisite undamaged reference pool. Major emphasis is given in this study to data reduction and assessment aspects that enable a decentralized approach operating within the hardware and power constraints of wireless sensor networks to avoid issues associated with packet loss, synchronization and latency. After over viewing various models for data reduction, the concept of a data-driven Bivariate Regressive Adaptive INdex (BRAIN) for damage detection is presented. Subsequent examples using experimental and simulated data verify two major hypotheses related to the BRAIN concept: (i) data-driven damage metrics are more robust and reliable than their counterparts and (ii) the use of heterogeneous sensing enhances overall detection capability of such data-driven damage metrics.
Andrés Correa-Valderrama,Willy Stangl-Herrera,Andrés Echeverry-Vélez,Erika Cantor,Tamy Ron-Translateur,Julio Cesar Palacio-Villegas 대한정형외과학회 2019 Clinics in Orthopedic Surgery Vol.11 No.2
Background: The goal of this study was to evaluate the relationship between body mass index (BMI) and early complications of total hip replacement (THR) and total knee replacement (TKR). Methods: This is a retrospective study of patients who underwent primary THR and TKR between January 2011 and December 2015. We included patients between 18 and 90 years of age with BMI less than 40 kg/m2 with a minimal postoperative follow-up time of 45 days. The primary outcomes were the presence of infection, mechanical complications (dislocation, fractures, arthrofibrosis, or neuropraxia), and thromboembolic events. Overweight and obesity were defined as a BMI of 25–29.9 kg/m2 and ≥ 30 kg/m2, respectively. Results: In total 750 patients were included (THR, 268; TKR, 482) with a mean age of 65.0 ± 12.4 years. The percentage of patients with normal weight, overweight, and obesity was 24.9% (n = 187), 41.7% (n = 313), and 33.4% (n = 250), respectively. The early complication rate was 8.9% (95% confidence interval [CI], 7.1% to 11.2%). Infection and mechanical complications were most prevalent. There was no statistically significant relationship between the incidence of complications and BMI (obesity vs. normal weight: hazard ratio [HR], 1.49; 95% CI, 0.72 to 3.06; p = 0.282); however, there was a tendency toward a greater risk of infectious complications in the patients with obesity (HR, 6.08; 95% CI, 0.75 to 49.16; p = 0.090). Patients with diabetes mellitus (DM) had more risk of infectious complications than those without DM (HR, 2.60; 95% CI, 1.00 to 6.79). Conclusions: There was no statistical relationship between BMI and early complications of THR and TKR. Nonetheless, there was a tendency toward a higher risk of infection in patients with some degree of obesity.
Silva-Correa Carmen R.,Villarreal-La Torre Víctor E.,González-Siccha Anabel D.,Cruzado-Razco José L.,González-Blas María V.,Sagástegui-Guarniz William Antonio,Calderón-Peña Abhel A.,Aspajo-Villalaz Ci 한국독성학회 2022 Toxicological Research Vol.38 No.2
Medicinal plants play an important role in the management of various diseases, so their use has become widespread. However, in some cases the population uses plant species regardless of the toxicity they may possess. The objective of this study was to evaluate the acute toxicity of aqueous extract from the leaves of Ambrosia arborescens Mill. on the biochemical and histopathological parameters of albino Holtzman rats. To do this, the leaves of A. arborescens were collected in the province of Julcan, La Libertad Region—Peru. OECD (Organisation for Economic Cooperation and Development) guideline 423 was conducted, forming experimental groups of 10 animals each one (5 males and 5 females): Group I (Control), which received 2 mL physiological saline solution (SSF 0.9%), Groups II and III (A. arborescens-300 and A. arborescens-2000), which were given the aqueous extract leaves of A. arborescens in a single dose of 300 and 2000 mg/kg/day, respectively. On the 14th day of exposure, biochemical (creatinine, ALT and AST) and histopathological parameters were measured. The results show that the aqueous extract of A. arborescens at the dose of 2000 mg/kg produces an increase in biochemical parameters which is related to histopathological analysis of liver and renal tissue with mild congestion. The study concludes that the aqueous extract leaves of A. arborescens has a LD50 greater than 2000 mg/kg and produces mild congestion in kidneys and liver, but showed no significant toxicological changes in the other albino Holtzman rats organs.