26 research outputs found
An investigation of organizational creativity of Micro, Small and Medium-Scale Restaurants in the Philippines using Structural Equation Modeling
Anchored on Teresa Amabile’s componential theoryof creativity, the organizational creativity model wasinvestigated. The primary goal was to investigate theinterrelationship of variables in the organizational creativitymodel such as domain-relevant skills, creative-relevant skills,intrinsic task motivation, work environment, and organizationalcreativity using 133 respondents from micro, small and mediumscalerestaurants inside and outside the National Capital Region(NCR) in the Philippines. Results of the partial least squaresstructuralequation modeling revealed that only creative-relevantskills and work environment predicts significantly organizationalcreativity, while work environment significantly affects creativerelevantskills, intrinsic task motivation, and domain-relevantskills. Implications for work environments, as in the case ofMicro, Small and Medium-Scale Enterprises (MSMEs) anddirections for future research are provided
An asiatic chironomid in Brazil: Morphology, DNA barcode and bionomics
In most freshwater ecosystems, aquatic insects are dominant in terms of diversity; however, there is a disproportionately low number of records of alien species when compared to other freshwater organisms. The Chironomidae is one aquatic insect family that includes some examples of alien species around the world. During a study on aquatic insects in Amazonas state (Brazil), we collected specimens of Chironomidae that are similar, at the morphological level, to Chironomus kiiensis Tokunaga and Chironomus striatipennis Kieffer, both with distributions restricted to Asia. The objectives of this study were to provide morphological information on this Chironomus population, to investigate its identity using DNA barcoding and, to provide bionomic information about this species. Chironomus DNA barcode data were obtained from GenBank and Barcode of Life Data Systems (BOLD) and, together with our data, were analyzed using the neighbor-joining method with 1000 bootstrap replicates and the genetic distances were estimated using the Kimura-2-parameter. At the morphological level, the Brazilian population cannot be distinguished either from C. striatipennis or C. kiiensis, configuring a species complex but, at the molecular level our studied population is placed in a clade together with C. striatipennis, from South Korea. Bionomic characteristics of the Brazilian Chironomus population differ from the ones of C. kiiensis from Japan, the only species in this species complex with bionomic information available. The Brazilian Chironomus population has a smaller size, the double of the number of eggs and inhabits oligotrophic water, in artificial container. In the molecular analysis, populations of C. striatipennis and C. kiiensis are placed in a clade, formed by two groups: Group A (which includes populations from both named species, from different Asiatic regions and our Brazilian population) and Group B (with populations of C. kiiensis from Japan and South Korea). Genetic distance between the Brazilian population and specimens in Group A suggests that it was recently introduced in Brazil, and that its country of origin is probably South Korea. © Gizelle Amora et al
EVALUACIÓN DEL EFECTO FITOTÓXICO DE RIZOBACTERIAS DELETÉREAS SOBRE EL CRECIMIENTO RADICAL DE AXONOPUS AFFINIS (CHASE) Y LENS ESCULENTA (MOENCH)
Las malezas ocasionan una gran pérdida en las tierras agrícolas y comúnmente, las medidas de manejo y contención de estas especies se dan con la aplicación de herbicidas, sin embargo; en años recientes se ha presentado un interés en establecer mecanismos de biocontrol seguros, con el empleo de bacterias inhibidoras del crecimiento conocidas como rizobacterias deletéreas (Deleterious rhizobacteria: DRB)que se consideran generalmente como no parasíticas, y causan, de manera sutil, efectos deletéreos a través de la producción de metabolitos dañinos a las plantas. El presente trabajo tuvo como objetivo caracterizar la producción de ácido cianhídrico de pseudomonas rizobacterianas de malezas de un cultivo de alfalfa (Medicago sativa L.) y evaluar el efecto fitotóxico de éstas sobre el crecimiento radical de plántulas de Axonopus affinis (Chase) y Lens esculenta (Moench). De acuerdo con los resultados obtenidos con relación a la evidencia de que los aislados de pseudomonadas son rizobacterias cianogénicas y de su efecto fitotóxico medido sobre las especies vegetales bajo estudio; se sugieren a éstas como posibles agentes de biocontrol con pastos que sean considerados malezas; ya que en general se observó que inhiben su crecimiento radical; sin embargo, un enfoque particular lo tiene la rizobacteria Pseudomonas sp. A52, la cual presentó no solamente actividad como una DRB sino también como una rizobacteria promotora del crecimiento vegetal; lo que la hace más importante de analizar en cuanto a su potencial y espectro de acción; tanto para malezas monocotiledóneas como para dicotiledóneas, recomendable como un posible agente de biocontrol con actividad múltiple
A chemosensory GPCR as a potential target to control the Root-Knot Nematode Meloidogyne incognita parasitism in plants.
Made available in DSpace on 2019-10-24T18:15:24Z (GMT). No. of bitstreams: 1
molecules2403798.pdf: 19607038 bytes, checksum: 72043c875bb4164ff917bd5eeeed827d (MD5)
Previous issue date: 2019bitstream/item/203619/1/molecules-24-03798.pd
Control of sand flies with attractive toxic sugar baits (ATSB) and potential impact on non-target organisms in Morocco
International audienceBackground: The persistence and geographical expansion of leishmaniasis is a major public health problem that requires the development of effective integrated vector management strategies for sand fly control. Moreover, these strategies must be economically and environmentally sustainable approaches that can be modified based on the current knowledge of sand fly vector behavior. The efficacy of using attractive toxic sugar baits (ATSB) for sand fly control and the potential impacts of ATSB on non-target organisms in Morocco was investigated. Methods: Sand fly field experiments were conducted in an agricultural area along the flood plain of the Ourika River. Six study sites (600 m x 600 m); three with ``sugar rich'' (with cactus hedges bearing countless ripe fruits) environments and three with ``sugar poor'' (green vegetation only suitable for plant tissue feeding) environments were selected to evaluate ATSB, containing the toxin, dinotefuran. ATSB applications were made either with bait stations or sprayed on non-flowering vegetation. Control sites were established in both sugar rich and sugar poor environments. Field studies evaluating feeding on vegetation treated with attractive (non-toxic) sugar baits (ASB) by non-target arthropods were conducted at both sites with red stained ASB applied to non-flowering vegetation, flowering vegetation, or on bait stations. Results: At both the sites, a single application of ATSB either applied to vegetation or bait stations significantly reduced densities of both female and male sand flies (Phlebotomus papatasi and P. sergenti) for the five-week trial period. Sand fly populations were reduced by 82.8% and 76.9% at sugar poor sites having ATSB applied to vegetation or presented as a bait station, respectively and by 78.7% and 83.2%, respectively at sugar rich sites. The potential impact of ATSB on non-targets, if applied on green non-flowering vegetation and bait stations, was low for all non-target groups as only 1% and 0.7% were stained with non-toxic bait respectively when monitored after 24 hours. Conclusions: The results of this field study demonstrate ATSB effectively controls both female and male sand flies regardless of competing sugar sources. Furthermore, ATSB applied to foliar vegetation and on bait stations has low non-target impact
Interfaces entre a história da violência e a constituição do território no Ceará: um esforço de síntese e periodização
A violência interpessoal fatal é um dos principais problemas de saúde pública no Brasil. Para a compreensão desse fenômeno complexo, é necessário esforço interdisciplinar. O objetivo deste artigo é investigar o papel desempenhado pela violência no processo histórico de construção do território no Ceará. O materialismo histórico foi utilizado como matriz teórica para estabelecer uma periodização crítica da violência. A articulação entre modo de produção e superestrutura permitiu uma aproximação da categoria formação social, no contexto do território. Foi possível estabelecer cinco blocos históricos relativamente homogêneos. A violência é um dos principais vetores da constituição do território cearense. Observa-se que esse fenômeno foi transformado em mais uma mercadoria, concreta e simbólica. A proximidade entre o perfil de jovem morto pela violência e o perfil de jovens desempregados não se deve ao acaso. Ambos sobrevivem nas periferias urbanas brasileiras carentes de políticas de proteção social. A persistência do modo de produção capitalista requer esse contingente populacional, que garante o baixo custo da força de trabalho, um dos pilares do desenvolvimento econômico no Ceará
EVALUATION OF PHYTOTOXIC EFFECT OF DELETERIOUS RHIZOBACTERIA ON THE ROOT GROWTH OF AXONOPUS AFFINIS (CHASE) AND LENS ESCULENTA (MOENCH)
Las malezas ocasionan una gran pérdida en las tierras agrícolas y comúnmente, las medidas de manejo y contención de estas especies se dan con la aplicación de herbicidas, sin embargo; en años recientes se ha presentado un interés en establecer mecanismos de biocontrol seguros, con el empleo de bacterias inhibidoras del crecimiento conocidas como rizobacterias deletéreas (Deleterious rhizobacteria: DRB)que se consideran generalmente como no parasíticas, y causan, de manera sutil, efectos deletéreos a través de la producción de metabolitos dañinos a las plantas. El presente trabajo tuvo como objetivo caracterizar la producción de ácido cianhídrico de pseudomonas rizobacterianas de malezas de un cultivo de alfalfa (Medicago sativa L.) y evaluar el efecto fitotóxico de éstas sobre el crecimiento radical de plántulas de Axonopus affinis (Chase) y Lens esculenta (Moench). De acuerdo con los resultados obtenidos con relación a la evidencia de que los aislados de pseudomonadas son rizobacterias cianogénicas y de su efecto fitotóxico medido sobre las especies vegetales bajo estudio; se sugieren a éstas como posibles agentes de biocontrol con pastos que sean considerados malezas; ya que en general se observó que inhiben su crecimiento radical; sin embargo, un enfoque particular lo tiene la rizobacteria Pseudomonas sp. A52, la cual presentó no solamente actividad como una DRB sino también como una rizobacteria promotora del crecimiento vegetal; lo que la hace más importante de analizar en cuanto a su potencial y espectro de acción; tanto para malezas monocotiledóneas como para dicotiledóneas, recomendable como un posible agente de biocontrol con actividad múltiple.</div
Evaluación del efecto fitotóxico de rizobacterias deletéreas sobre el crecimiento radical de Axonopus affinis (Chase) y Lens esculenta (Moench)
Weeds are a group of plants that commonly generate a huge loss of land crops; the management strategies and contention of these plant species includes the application of herbicides, although in recently years, it is now an interest to the establishment of safety biocontrol mechanisms, with the employment of microorganisms for the weeds' management, one microbial group that has been employed is the Deleterious rhizobacteria (DRB), a non-parasitic rhizospheric bacteria that causes a subtledeleterious effects on plants through the production of harmful metabolites. The aim of the present work was to characterize the cyanide production of rhizospheric pseudomonads isolated from weeds of alfalfa crop and evaluates their phytotoxic effect on the root growth of Axonopus affins (Chase) and Lens esculenta (Moench) seedlings. According to the obtained results related with the evidence that the pseudomonads isolates were cyanogenic rhizobacteria and with their phytotoxic effect measured on the plant species under study, these rhizobacteria are recommended as biocontrol agents of grass weeds, because the inhibitory effect on A. affinis plantlets. Particular focus possess the Pseudomonas sp. A52 strain, because it presents not only activity as DRB, it has also activity as plant growth promoter, that makes to analyze this rhizobacteria regarding to its potential and action spectra for monocotyledonous and dicotyledonous weeds, and as a recommendable biocontrol agent with multiple activity.Las malezas ocasionan una gran pérdida en las tierras agrícolas y comúnmente, las medidas de manejo y contención de estas especies se dan con la aplicación de herbicidas, sin embargo; en años recientes se ha presentado un interés en establecer mecanismos de biocontrol seguros, con el empleo de bacterias inhibidoras del crecimiento conocidas como rizobacterias deletéreas (Deleterious rhizobacteria: DRB)que se consideran generalmente como no parasíticas, y causan, de manera sutil, efectos deletéreos a través de la producción de metabolitos dañinos a las plantas. El presente trabajo tuvo como objetivo caracterizar la producción de ácido cianhídrico de pseudomonas rizobacterianas de malezas de un cultivo de alfalfa (Medicago sativa L.) y evaluar el efecto fitotóxico de éstas sobre el crecimiento radical de plántulas de Axonopus affinis (Chase) y Lens esculenta (Moench). De acuerdo con los resultados obtenidos con relación a la evidencia de que los aislados de pseudomonadas son rizobacterias cianogénicas y de su efecto fitotóxico medido sobre las especies vegetales bajo estudio; se sugieren a éstas como posibles agentes de biocontrol con pastos que sean considerados malezas; ya que en general se observó que inhiben su crecimiento radical; sin embargo, un enfoque particular lo tiene la rizobacteria Pseudomonas sp. A52, la cual presentó no solamente actividad como una DRB sino también como una rizobacteria promotora del crecimiento vegetal; lo que la hace más importante de analizar en cuanto a su potencial y espectro de acción; tanto para malezas monocotiledóneas como para dicotiledóneas, recomendable como un posible agente de biocontrol con actividad múltiple