Coal mine gas with methane concentration lower than 30 % is regarded as low-concentration gas.Currently, both domestically and internationally, coal mine gas with methane concentration ranging from 10 % to 30 % is mainly used for power generation.However, it is not easy to safely combust and treat coal mine gas with methane concentration below 10 %
Las dificultades que presentaba la utilización de las cimbras tradicionales al construir ciertos puentes de hormigón pretensado han forzado a encontrar una solución que superase los inconvenientes, conservando, o mejorando a ser posible, todas las read more ventajas en orden a seguridad, rapidez, economía, etc.Los andamiajes de lanzamiento pare
Molecular marker techniques in the study of wild read more basidiomycete, are increasingly applied to ecology projects, with special focus on analysis of genetic diversity.Often require specialized methods for extracting the DNA of organisms of natural environments, because of the complex compounds that are (carbohydrate polymers) and contaminants
Asthma is a complex, inflammatory disorder characterized by airflow obstruction of variable degrees, bronchial hyper-responsiveness, echofix spring reverb and airway inflammation.Asthma is caused by environmental factors and a combination of genetic and environmental stimuli.Genetic studies have revealed that multiple loci are involved in the etiol