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Selecting phototrophic species of native biocrusts in arid and semi-arid regions
Get PDFBackground: Biological soil crusts (BSCs) that are able to produce sticky extracellular polymeric
substances (EPS) play an important role in the formation of soil aggregates, thereby, reducing soil
erosion. In this study, experiments were undertaken to identify biocrust species that produce EPS, in
order to combat desertification in the Sejzi desert of Iran.
Methods: A biocrust distribution map of Sejzi plain was prepared using Landsat 8 OLI images, then,
various sampling points were selected. Some physicochemical parameters of samples from lichendominated
and non-biocrusted areas were measured. The relationship between soil parameters
and biocrusts presence was confirmed based on the Pearson’s correlation coefficient and principal
component analysis (PCA) method. The type of chemical compounds in the soil content were
determined via Fourier transform infrared spectroscopy (FTIR), including polysaccharides. To estimate
the degradability of polysaccharides, each soil sample was placed under defined UV-B radiation for 24,
48, and 72 hours at three replications.
Results: There was no significant correlation between moss and lichen species with the amount of EPS
(%) values and various occurring cyanolichen species in three biocrusted soil samples, which included
Collema coccophorum, Collema tenax, Peccania terricola, and Placidium squamulosum. It was speculated
that these polysaccharides were produced by the photobiotic partners (microalgae or cyanobacteria)
and secreted to the soil.
Conclusion: According to the results, the cyanobacteria species of biocrusted samples might have high
potential to combat desertification and soil stabilization in Sejzi desert.
Keywords: Cyanobacteria, Fourier transform infrared, Lichens, Polysaccharides, Sejzi plain, Ira
Health sector’s flood response plan: A comprehensive review
Get PDFBackground: Floods are the most common natural disaster which may have substantial impacts on the
human health and life and the environment. In recent years, Iran have faced many floods and it seems
that increasing impacts of floods in Iran are attributed to inadequate preparation and no well-established
strategies and guidelines for response by health sector and other related response organizations. So, this
study was conducted to review the current plans in the world to identify the required elements of the
flood emergency response plan to prevent its consequences on the health sector in Iran.
Methods: A comprehensive review was performed through search on electronic data bases, including,
Medline, Scopus, ProQuest, and e-journals which were accessible during 2010-2020. The keywords
were response plan, flood, requirements, guidelines, and health sector. Data were collected using data
extraction form and analyzed through content analysis.
Results: In the initial search, 960 possible sources of flood response were identified. After excluding
duplicate papers and the documents that did not contribute to the flood response plan, 64 articles and
programs or guidelines that all them has been reviewed, were obtained. The findings were divided into
two groups, response prerequisites and response activities.
Conclusion: This review provided a complete view of the flood consequences for the health sector and
allows professionals to incorporate facets of the health effect of floods into a flood response plan. The
flood response plan was divided into two general categories: Initial and specific, each of which plays an
important role in preventing the negative effects of the floods.
Keywords: Flood, Response plan, Health sector, Response prerequisite, Response actio
Association of urinary triclosan and methyl-triclosan levels with predictive indicators of cardiovascular disease and obesity in children and adolescents in 2020 (case study: Kerman, Iran)
Get PDFBackground: Exposure of children and adolescents to endocrine disrupting chemicals (EDCs) causes
the development of non-communicable diseases. Triclosan (TCS) is a fat-soluble antimicrobial agent,
and methyl-triclosan (MTCS) is the predominant metabolite of TCS. The increasing use of consumables
TCS (toothpaste, mouthwash, personal care products) in human has raised concerns about human
health.
Methods: The urinary concentrations of TCS and MTCS were measured by GC/MS. Lipid profiles (TG,
TC, LDL, and HDL), anthropometric parameters (WC, BMI z-score, and BMI), FBS, SBP, and DBP tests
were performed on 79 children and adolescents.
Results: Of 79 people included as the study population, 42 subjects (53.16%) were males. Most of the
study population as 32 subjects (40.50%) were obese. The mean concentrations of TCS and MTCS in
the obese population were 5.47 ± 2.99 and 2.32 ± 1.04 μg/L, respectively. After adjusting for possible
confounding factors, the results showed that a one-unit increase in DBP caused a 0.03 units increase in
TCS levels in male subjects (P = 0.01). A one-unit increase in DBP also caused a 0.02 units increase in
MTCS (P = 0.001). There was a significant relationship between TCS and HDL (OR = 0.90, P = 0.005),
LDL (OR = 1.13, P = 0.01), and TG (OR =1.05, P < 0.0001). There was also a significant relationship
between MTCS and HDL (OR = 0.88, P = 0.001), LDL (OR = 1.03, P = 0.009), and TG (OR = 1.04,
P < 0.0001).
Conclusion: According to the results, there is a relationship between TCS, MTCS, and predictive
indicators of cardiovascular diseases and obesity.
Keywords: Triclosan, Methyl triclosan, Cardiovascular disease, Obesity, Endocrine disrupter, Children,
Adolescen
تحلیل هزینه - اثربخشی دفیبریلاتور قلبی قابل کاشت در مقایسه با روش دارو درمانی در بیماران در معرض آریتمی
Get PDF=Ocular Manifestations in patients with Coronavirus disease (COVID19) hospitalized to afzalipour in kerman 2020-2021
Get PDF=Evaluation of the relationship between intravenous ondansetron dose and QTc interval increase in electrocardiography of patients referred to the emergency department
Get PDF=Evaluation of sleep quality and its relationship with mental health in adult with beta thalassemia major
Get PDF=Comparison of mental health in kidney transplant recipients before and after transplantation from live donor and cadaver in Afzalipour hospital in Kerman
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