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Search Results: 1 - 10 of 9685 matches for " Rosales Regina "
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Geographic distribution and morphometric differentiation of Triatoma nitida usinger 1939 (Hemiptera: Reduviidae: Triatominae) in Guatemala
Monroy Carlota,Bustamante Dulce María,Rodas Antonieta,Rosales Regina
Memórias do Instituto Oswaldo Cruz , 2003,
Abstract: Triatoma nitida was found in 14 (0.4%) out of 3,726 houses located in six departments across Guatemala, which were surveyed from 1994 to 1998 by the man-hour collection method. Compared to previous information, the distribution of T. nitida in Guatemala has increased from five to nine departments; the species is present in mild climates at altitudes from 960 to 1,500 m. Fourteen percent of the intradomestic T. nitida were infected with Trypanosoma cruzi. The species was often found in conjunction with other triatomines (T. dimidiata and Rhodnius prolixus). The domestic and peridomestic presence of T. nitida in Guatemala was rare, but occasionally this species was colonizing human-made constructions. T. nitida appears to have a low importance as Chagas disease vector in Guatemala, as indicated by its scarce presence in the domestic habitats and defecation patterns. However, it clearly has potential to become a Chagas vector so we recommend an on-going study of the intradomestic presence of T. nitida following the control programs in Guatemala. Morphometric analysis of 47 T. nitida males from three localities showed quantitative differences between the populations, which indicates that geographic distance is an important factor in the structuring of T. nitida populations.
Epidemiology of Chagas disease in Guatemala: infection rate of Triatoma dimidiata, Triatoma nitida and Rhodnius prolixus (Hemiptera, Reduviidae) with Trypanosoma cruzi and Trypanosoma rangeli (Kinetoplastida, Trypanosomatidae)
Monroy Carlota,Rodas Antonieta,Mejía Mildred,Rosales Regina
Memórias do Instituto Oswaldo Cruz , 2003,
Abstract: A five-year domiciliary collection in the 22 departments of Guatemala showed that out of 4,128 triatomines collected, 1,675 were Triatoma dimidiata (Latreille, 1811), 2,344 were Rhodnius prolixus Stal 1859, and only 109 were T. nitida Usinger 1939. The Chagas disease parasite, Trypanosoma cruzi, was found in all three species. Their natural infection rates were similar in the first two species (20.6%; 19.1%) and slightly lower in T. nitida(13.8%). However there was no significant difference in the infection rates in the three species (p = 0.131). T. dimidiata males have higher infection rates than females (p = 0.030), whereas for R. prolixus there is no difference in infection rates between males and females (p = 0.114). The sex ratios for all three species were significantly skewed. More males than females were found inside houses for T. dimidiata (p < 0.0001) and T. nitida (p = 0.011); a different pattern was seen for R. prolixus (p = 0.037) where more females were found. Sex ratio is proposed as an index to show the mobility of T. dimidiata in different populations. T. dimidiata is widely distributed in the country, and is also the main vector in at least ten departments, but R. prolixus with higher vectorial capacity is an important vector in at least two departments.
Geographic distribution and morphometric differentiation of Triatoma nitida usinger 1939 (Hemiptera: Reduviidae: Triatominae) in Guatemala
Monroy, Carlota;Bustamante, Dulce María;Rodas, Antonieta;Rosales, Regina;Mejía, Mildred;Tabaru, Yuichiro;
Memórias do Instituto Oswaldo Cruz , 2003, DOI: 10.1590/S0074-02762003000100006
Abstract: triatoma nitida was found in 14 (0.4%) out of 3,726 houses located in six departments across guatemala, which were surveyed from 1994 to 1998 by the man-hour collection method. compared to previous information, the distribution of t. nitida in guatemala has increased from five to nine departments; the species is present in mild climates at altitudes from 960 to 1,500 m. fourteen percent of the intradomestic t. nitida were infected with trypanosoma cruzi. the species was often found in conjunction with other triatomines (t. dimidiata and rhodnius prolixus). the domestic and peridomestic presence of t. nitida in guatemala was rare, but occasionally this species was colonizing human-made constructions. t. nitida appears to have a low importance as chagas disease vector in guatemala, as indicated by its scarce presence in the domestic habitats and defecation patterns. however, it clearly has potential to become a chagas vector so we recommend an on-going study of the intradomestic presence of t. nitida following the control programs in guatemala. morphometric analysis of 47 t. nitida males from three localities showed quantitative differences between the populations, which indicates that geographic distance is an important factor in the structuring of t. nitida populations.
Epidemiology of Chagas disease in Guatemala: infection rate of Triatoma dimidiata, Triatoma nitida and Rhodnius prolixus (Hemiptera, Reduviidae) with Trypanosoma cruzi and Trypanosoma rangeli (Kinetoplastida, Trypanosomatidae)
Monroy, Carlota;Rodas, Antonieta;Mejía, Mildred;Rosales, Regina;Tabaru, Yuichiro;
Memórias do Instituto Oswaldo Cruz , 2003, DOI: 10.1590/S0074-02762003000300003
Abstract: a five-year domiciliary collection in the 22 departments of guatemala showed that out of 4,128 triatomines collected, 1,675 were triatoma dimidiata (latreille, 1811), 2,344 were rhodnius prolixus stal 1859, and only 109 were t. nitida usinger 1939. the chagas disease parasite, trypanosoma cruzi, was found in all three species. their natural infection rates were similar in the first two species (20.6%; 19.1%) and slightly lower in t. nitida(13.8%). however there was no significant difference in the infection rates in the three species (p = 0.131). t. dimidiata males have higher infection rates than females (p = 0.030), whereas for r. prolixus there is no difference in infection rates between males and females (p = 0.114). the sex ratios for all three species were significantly skewed. more males than females were found inside houses for t. dimidiata (p < 0.0001) and t. nitida (p = 0.011); a different pattern was seen for r. prolixus (p = 0.037) where more females were found. sex ratio is proposed as an index to show the mobility of t. dimidiata in different populations. t. dimidiata is widely distributed in the country, and is also the main vector in at least ten departments, but r. prolixus with higher vectorial capacity is an important vector in at least two departments.
Energizing Social Interactions at Work: An Exploration of Relationships that Generate Employee and Organizational Thriving  [PDF]
Robert M. Rosales
Open Journal of Social Sciences (JSS) , 2016, DOI: 10.4236/jss.2016.49004
Abstract:
A company’s greatest asset is its people provided they are fully engaged. In our increa-singly service-based economies, social relationships and swift coordination among employees are the means by which a lot of work gets done. Thus, whether organiza-tions and their employees flourish or languish largely depends on the quality of the so-cial connections they nurture. The quality of the workplace connections can be defined as life giving (high quality) or life depleting (low quality). Positive social interactions facilitate organizational learning, cooperation, effectiveness, and employee loyalty, among many other desirable outcomes. High-quality connections are brief, mutually beneficial, and dynamic dyadic interactions, which have the power to energize people with vital resources to do their work well. Positive psychology and positive organizational scholarship—the science of how people and organizations flourish—provides us with tools that can help bring about high-quality connections. This paper defines high-quality connections at work, examines the benefits of high- quality connections, and provides a framework for building high-quality connections. The paper shows that high-quality connections are a pathway to build individual and organizational flourishing.
Distance Measure Based Rules for Voltage Regulation with Loss Reduction  [PDF]
Y. Rosales Hernandez, T Hiyama
Journal of Electromagnetic Analysis and Applications (JEMAA) , 2009, DOI: 10.4236/jemaa.2009.12013
Abstract: This paper presents a rule-based technique to control the voltage in a power transmission network. Transformers with a tap changer installed in the system are selected by the proposed technique as control devices. For each bus under volt-age violation, the most effective control device is selected by using the minimum electric distance criteria. In order to demonstrate the efficiency of the method, several simulations were performed using an IEEE 30-bus network as a model system. The distance measure technique is compared with classic voltage regulation approach and a genetic algorithm based. The results obtained show the robustness of the proposed method.
Defects Interaction on the Mechanical Properties during Transition Formation of (Mo, Cr)3Si Intermetallic Alloys  [PDF]
I. Rosales, H. Martínez
Journal of Materials Science and Chemical Engineering (MSCE) , 2014, DOI: 10.4236/msce.2014.211009
Abstract: Molybdenum silicides alloys with different Mo and Cr additions were produced by the arc cast method. The microstructure revealed mostly single phase structure. Mechanical properties were evaluated in the alloys, showing a decreasing behavior on microhardness. Fracture toughness values were obtained from cracks produced by Vickers indentation technique, showing that ternary alloying did not have a significant effect. Vacancy studies demonstrated that thermal vacancies along the transition line slightly affected the mechanical behavior.
Rese a "Dos poetas y sus fábulas"
Edixon Rosales
Opción , 2011,
Abstract:
Phagocytosis, a cellular immune response in insects
C Rosales
Invertebrate Survival Journal , 2011,
Abstract: Insects like many other organisms are exposed to a wide range of infectious agents. Defense against these agents is provided by innate immune systems, which include physical barriers, humoral responses, and cellular responses. The humoral responses are characterized by the production of antimicrobial peptides, while the cellular defense responses include nodulation, encapsulation, melanization and phagocytosis. The phagocytic process, whereby cells ingest large particles, is of fundamental importance for insects’ development and survival. Phagocytic cells recognize foreign particles through a series of receptors on their cell membrane for pathogen-associated molecules. These receptors in turn initiate a series of signaling pathways that instruct the cell to ingest and eventually destroy the foreign particle. This review describes insect innate humoral and cellular immune functions with emphasis on phagocytosis. Recent advances in our understanding of the phagocytic cell types in various insect species; the receptors involved and the signaling pathways activated during phagocytosis are discussed.
Sistema penal, seguridad ciudadana y policía en las metrópolis (Venezuela y el contexto regional)
Elsie Rosales
Espacio Abierto , 2010,
Abstract: Este ensayo, aunque contextualizado en la búsqueda de explicaciones acerca de los sistemas penales de los cuales, uno de los ámbitos identificados ha sido la seguridad, coloca su indagación en el otro lado: la despenalización de la seguridad, para que ésta trascienda los muros del sistema penal e intente proveer seguridad para los derechos, tesis que se innova como consecuencia de haber comprendido la incapacidad intrínseca y demostrada de los sistemas penales para abordar racionalmente la conflictividad humana más dura. Como consecuencia, se define a la seguridad como garantía de los derechos, lo que obliga a su evolución hacia la filosofía, políticas y acciones consustanciadas con el imperio constitucional de los derechos, lo cual pasa por el reencuentro humano y social en el espacio urbano como componente clave de tal despenalización.
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