Efficient Removal of Ultrafine Particles from Diesel Exhaust by Selected Tree Species: Implications for Roadside Planting for Improving the Quality of Urban Air

Aim: To evaluate the effect of irrigation techniques, i.e. different types of irrigation needles, on the quality of cleaning of root canal walls using scanning electron microscopy (SEM). Material and Method: The study was conducted on 16 extracted, single-rooted, human teeth. The samples were allocated to two experimental groups depending on the type of the irrigation needle. Conventional needles were used for the irrigation of Group I and laterally perforated ones for Group II. All root canals were instrumented using K files and the Step-back technique. During instrumentation, all samples were irrigated with 2.5 % sodium hypochlorite solution followed by final irrigation with 17 % EDTA for 1 min. After that, all samples were irrigated with 10 ml of distilled water. The roots were, then, sectioned longitudinally and middle one third of each root canal was analyzed using SEM. Quantitative analysis was based on criteria by H?lsmann et al. Results: The obtained results showed that the more efficient removal of debris and the smear layer was accomplished in the group of samples irrigated using laterally perforated needles than conventional needles. The difference between the investigated irrigation techniques were statistically significant (p<0.01). Conclusion: The use of laterally perforated needles for irrigation allows more efficient cleaning of root canal walls, i.e. the removal of debris and the smear layer.

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How do ultrafine particles in urban air affect ambulatory blood pressure?

Journal of Hypertension ◽

10.1097/hjh.0000000000002343 ◽

2020 ◽

Vol 38 (5) ◽

pp. 845-849

Author(s):

Núria Soldevila ◽

Ernest Vinyoles ◽

Aurelio Tobias ◽

José R. Banegas ◽

Alejandro De La Sierra ◽

...

Keyword(s):

Blood Pressure ◽

Ambulatory Blood Pressure ◽

Ultrafine Particles ◽

Urban Air

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Genetic Diversity of Some Sweet Cherry Cultivars Based on Molecular Markers

Bulletin of University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca Agriculture ◽

10.15835/buasvmcn-agr:12405 ◽

2016 ◽

Vol 73 (2) ◽

pp. 153

Author(s):

Ioana Virginia Berindean ◽

Elena Tămaş ◽

Oana Maria Toderic ◽

Ioan Zagrai

Keyword(s):

Tree Species ◽

Rapd Markers ◽

Sweet Cherry ◽

Prunus Avium ◽

Molecular Level ◽

Genetic Relationships ◽

Pcr Amplification ◽

High Level ◽

Sweet Cherry Cultivars

Sweet cherry (Prunus avium L.), originated around the Caspian and Black Sea, is an important fruit tree species of economic interest, and hence, breeding and conservation are requested (. Genetic analysis at the molecular level can be used effectively to study molecular polymorphism existing between intraspecific and interspecific tree species and phylogenetic relationships between them and their hybrids. The purpose of this study was to characterize and determine genetic relationships among the sweet cherry native genotypes belonging to Fruit Research & Development Station Bistrita, Romania, using RAPD markers. To eliminate the existence of possible synonyms from national romanian collection, we collect four Van cultivars, from four different national collection. For molecular analysis of the 16 varieties of sweet cherry were considered 13 RAPD primers selected from the literature. They were later used to determine the genetic variability at the molecular level using PAST program, and the dendrogram was generated based on Jaccard’s genetic distance. The dendrogram constructed by PAST software. The quantity and quality of the DNA obtained was suitable to achieve PCR amplification step. Only seven out of the 13 RAPD primers have generate polymorphic bands. The rest of seven were monomorphics. The most polymorphic primer was OPB10 which generated 11 bands from which 100% were polymorphic.Seven RAPD primers generated a high level of polymorphism which allowed to divide these cherry varieties into two groups according to their genetic geographical origin and the pedigree.

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Air pollution and cardiovascular disease: car sick

Cardiovascular Research ◽

10.1093/cvr/cvz228 ◽

2019 ◽

Cited By ~ 6

Author(s):

Mark R Miller ◽

David E Newby

Keyword(s):

Air Pollution ◽

Diesel Exhaust ◽

Ultrafine Particles ◽

Cardiovascular Health ◽

Cardiovascular Effects ◽

Urban Environments ◽

Vehicle Exhaust ◽

Diesel Exhaust Exposure ◽

Particle Matter ◽

Organ Systems

Abstract The cardiovascular effects of inhaled particle matter (PM) are responsible for a substantial morbidity and mortality attributed to air pollution. Ultrafine particles, like those in diesel exhaust emissions, are a major source of nanoparticles in urban environments, and it is these particles that have the capacity to induce the most significant health effects. Research has shown that diesel exhaust exposure can have many detrimental effects on the cardiovascular system both acutely and chronically. This review provides an overview of the cardiovascular effects on PM in air pollution, with an emphasis on ultrafine particles in vehicle exhaust. We consider the biological mechanisms underlying these cardiovascular effects of PM and postulate that cardiovascular dysfunction may be implicated in the effects of PM in other organ systems. The employment of multiple strategies to tackle air pollution, and especially ultrafine particles from vehicles, is likely to be accompanied by improvements in cardiovascular health.

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Observational and experimental evaluation of hemiparasite resistance in trees in the urban afforestation of Santarém, Pará, Brazil

Acta Amazonica ◽

10.1590/1809-4392201700033 ◽

2017 ◽

Vol 47 (4) ◽

pp. 311-320 ◽

Cited By ~ 1

Author(s):

Francisco Pinheiro da SILVA ◽

Rodrigo Ferreira FADINI

Keyword(s):

Tree Species ◽

Mangifera Indica ◽

Urban Trees ◽

Exotic Tree ◽

Deposition Processes ◽

Tree Compatibility ◽

The City ◽

Better Than

ABSTRACT One of the problems affecting the quality of urban trees is their infestation by mistletoes (aerial hemiparasite plants of the order Santalales). Identification of the main types of trees infested, and of the causes of infestation patterns, can help infestation control and the planning of efficient planting regimes. In this sense, the aim of this study was to evaluate the patterns of hemiparasite infestation in trees in an Amazonian urban environment. We aimed to answer (1) which species of mistletoes occur on urban trees in the city of Santarém, in the Brazilian Amazon; (2) what is the proportion and intensity of infestation on infected trees; and (3) if differences in infestation rates among tree species can be explained by mistletoe-tree compatibility. We assessed mistletoe incidence and intensity of infestation on trees in the main avenues of the city. To evaluate the role of mistletoe-tree compatibility in the observed parasitism patterns, we carried out a seed inoculation experiment with seeds of the most abundant mistletoe, Passovia theloneura. Seeds were planted on three tree species (Andira inermis, Handroanthus serratifolius, and Mangifera indica). The overall infestation rate was 19.3%, with exotic tree species more infested than natives. The experiment showed that incompatibility between P. theloneura and the native H. serratifolius is primarily responsible for the observed non-infestation. Mistletoes germinated on A. inermis grew better than those on M. indica, contrary to the infestation prevalence found in the field, suggesting that patterns of infestation are also influenced by seed deposition processes.

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