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Search Results: 1 - 10 of 2939 matches for " Margaret Valderrama "
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4,6-Diamino-5-[4-(dimethylamino)benzylidene]pyrimidin-2(5H)- one
Gricela Lobo,Jaime Charris,Margaret Valderrama,Antonieta Taddei
Molbank , 2009, DOI: 10.3390/m615
Abstract: A new compound, 4,6-diamino-5-[4-(dimethylamino)benzylidene]pyrimidin-2(5H)-one, was synthesized and its IR, 1H NMR and 13C NMR and MS spectroscopic data are presented.
4,6-Diamino-5-(4-methylbenzylidene)pyrimidin-2(5H)-one
Gricela Lobo,Jaime Charris,Margaret Valderrama,Jesús Romero,Cristina Castelli,Antonieta Taddei
Molbank , 2010, DOI: 10.3390/M653
Abstract: A new compound, 4,6-diamino-5-(methylbenzylidene)pyrimidin-2(5 H)-one, was synthesized and its IR, 1H NMR, 13C NMR and MS spectroscopic data are presented.
Workplace mistreatment: Health, working environment and social and economic factors  [PDF]
Margaret Hodgins
Health (Health) , 2014, DOI: 10.4236/health.2014.65057
Abstract:

Objective: To explore patterns of workplace mistreatment, relationships with health and with selected workplace, economic and social factors in 34 countries. Methods: Secondary data analysis of the European Working Conditions Survey. Results: Patterns of ill treatment (across occupational groups, and sectors) were broadly consistent with smaller, less representative studies. Prevalence was lower than many studies but corresponds with estimates of serious mistreatment. Mistreatment increases the risk of both physical and mental ill health and is associated with a range of work environment factors. Mistreatment is more prevalent in countries with smaller gender gaps, better performance on the GINI index for income inequality and for countries with specific anti-bullying legislation. Conclusions: Mistreatment in work is complex, and interventions are required at the level of the organization. Implementation issues need to be addressed, as specific anti-bullying legislation does not appear to provide sufficient protection.

El carácter nacional y la psicología de los pueblos en América Latina
Pablo Valderrama
Revista Latinoamericana de Psicología , 1986,
Abstract: Este trabajo tiene la finalidad de dar a conocer las obras de Psicología de los Pueblos elaboradas por algunos intelectuales latinoamericanos. Se vconsíderan como contribuciones pioneras en la especialidad. Se describen algunos antecedentes de esta corriente: Federico Hegel, Gustav Le Bon y Hebert Spencer. Asimismo se hacen comentarios sobre la insuficiencia de las actuales historias de la psicología social y/o transcul tural. Después de hacer estos se alamientos sobre posibles causas del origen latinoamericano de los estudios sobre el carácter nacional, se describen someramente las investigaciones realizadas en Argentina, Bolivia, Ecuador y México. Sobresalen los nombres de Carlos Octavio Bunge, José María Ramos Mejía, Alcides Arguedas, Alfredo Espinosa Tamayo, Francisco Bulnes y Ezequiel A. Chávez
Poisonous animals in Latin America Animales ponzo osos en Latinoamérica
Rafael Valderrama
Biomédica , 2010,
Abstract:
Genetics of a sex-linked recessive red eye color mutant of the tarnished plant bug, Lygus lineolaris  [PDF]
Margaret Louise Allen
Open Journal of Animal Sciences (OJAS) , 2013, DOI: 10.4236/ojas.2013.32A001
Abstract: An inbred colony of the tarnished plant bug, Lygus lineolaris (Palisot de Beauvois) (Miridae: Hemiptera), was observed to contain specimens with abnormal traits including red eyes, deformed antennae, and deformed legs. These specimens were isolated and back crossed to create stable phenotypic strains. The only successful strain established was a red eyed strain named Cardinal. The trait was more prevalent and stable in males, suggesting that it could be sex linked. To test the hypothesis that the trait was based on a recessive sex linked allele, classical genetic crosses were performed. The hypothesis was confirmed, and the eye color phenotype was measured and characterized using color analysis software. The trait is similar to other red eyed phenotypes described in this species, but is clearly based on a different mutation since it is sex linked rather than autosomal. The results of crossing experiments also suggest that inbreeding in this species results in substantial fitness cost to laboratory insects.
Stroke and Constipation
—Coincidence or Interrelated?
 [PDF]

Jayaprada Kasaraneni, Margaret Hayes
Health (Health) , 2014, DOI: 10.4236/health.2014.619313
Abstract: Emile Gautier once said, “Freedom of the bowels is the most precious, perhaps even the most essential, of all freedoms—one without which little can be accomplished.” This paper will explore the neuronal physiology, pathophysiology, theories regarding the correlation between stroke and constipation along with a few treatment options. Patients often recovering from stroke complain of constipation and it is most likely attributed to changes in diet, ambulation, or fluid balance. However, there are not many studies to reflect the correlation between other less significant symptoms and stroke presentation.
Genetics of a sex-linked recessive red eye color mutant of the tarnished plant bug, Lygus lineolaris  [PDF]
Margaret Louise Allen
Open Journal of Animal Sciences (OJAS) , 2013, DOI: 10.4236/ojas.2013.32A001
Abstract:

An inbred colony of the tarnished plant bug, Lygus lineolaris (Palisot de Beauvois) (Miridae: Hemiptera), was observed to contain specimens with abnormal traits including red eyes, deformed antennae, and deformed legs. These specimens were isolated and back crossed to create stable phenotypic strains. The only successful strain established was a red eyed strain named Cardinal. The trait was more prevalent and stable in males, suggesting that it could be sex linked. To test the hypothesis that the trait was based on a recessive sex linked allele, classical genetic crosses were performed. The hypothesis was confirmed, and the eye color phenotype was measured and characterized using color analysis software. The trait is similar to other red eyed phenotypes described in this species, but is clearly based on a different mutation since it is sex linked rather than autosomal. The results of crossing experiments also suggest that inbreeding in this species results in substantial fitness cost to laboratory insects.

The Impact of Encroachment on the Distribution of Tree Species in Cross River National Park, Oban Division, Nigeria  [PDF]
Margaret A. Yaro
Journal of Environmental Protection (JEP) , 2015, DOI: 10.4236/jep.2015.67068
Abstract: Increasing human activities around protected area pinpoint to looming degradation and alteration of the component of such areas, especially where adequate measures are not taken to forestall encroachment. The Oban division of the Cross River National Park is one of the oldest rainforests and has been identified as a biodiversity hotspot. However, communities settling around the park have been involved in some economic activities for their livelihood. Resource utilization at the edge of the park may alter the components of the park such as species diversity. Therefore this study is geared towards assessing the impact of human encroachment and the concomitant impact on the distribution of species within the park. The study adopted participatory research methods which included Focus Group Discussion and participatory mapping as well as a plot based survey which involved the laying of sample plots within two zones of the park designated as areas bounded by cultivated land and areas bounded by fallow. Three 40 m × 40 m square plots are laid along a 320 meter transect measured from the boundary of the park at each buffer zone. The plots are separated by 100 m gap. From the result obtained, it is discovered that Musanga cercropoides dominates the outer plots of the cultivated zones and fallow zones comprising 20.2 and 21.5 percent respectively while Terminalia ivorensis dominates the middle and inner areas of the park. Moreover the composition of species decreases inward to the inner part of the park. Diversity index decreases in the order of 2.566 < 2.348 < 2.163 at the cultivated zones and 2.443 < 2.376 < 2.366 at the fallow zones. It is concluded that human activities close to the park alters the species composition of the park. Hence, it’s recommended that adequate alternatives livelihood and incentive be provided to support zone communities to reduce their dependents on the edge of the park.
Gold: A Unique Pigmentation Defective Laboratory Strain of the Lady Beetle  [PDF]
Margaret Louise Allen
Advances in Entomology (AE) , 2016, DOI: 10.4236/ae.2016.41002
Abstract: A laboratory colony of Coleomegilla maculata (De Geer) was selected for a novel phenotypic color trait. The phenotype was paler in color than the wild type, although not as pale as a previously described mutant strain, yellow (ye), and retained dark pigmentation in the eyes. This selected strain was named gold. Mendelian breeding experiments indicate a recessive biallelic inheritance. The strain has decreased fitness characteristics based on measurements of egg production and pupa size.
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