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111.
Sulforaphane (SFN) is an isothiocyanate found in cruciferous vegetables with anti-inflammatory, anti-oxidant and anti-cancer activities. However, the antioxidant and anticancer mechanism of sulforaphane is not well understood. In the present research, we reported binding modes, binding constants and stability of SFN–DNA and -RNA complexes by Fourier transform infrared (FTIR) and UV–Visible spectroscopic methods. Spectroscopic evidence showed DNA intercalation with some degree of groove binding. SFN binds minor and major grooves of DNA and backbone phosphate (PO2), while RNA binding is through G, U, A bases with some degree of SFN–phosphate (PO2) interaction. Overall binding constants were estimated to be K(SFN–DNA)=3.01 (± 0.035)×104 M-1 and K(SFN–RNA)= 6.63 (±0.042)×103 M-1. At high SFN concentration (SFN/RNA = 1/1), DNA conformation changed from B to A occurred, while RNA remained in A-family structure. 相似文献
112.
Spatial and technological variability in the carbon footprint of durum wheat production in Iran 总被引:1,自引:0,他引:1
Mohammad Davoud Heidari Hossein Mobli Mahmoud Omid Shahin Rafiee Vahid Jamali Marbini Pieter M. F. Elshout Rosalie Van Zelm Mark A. J. Huijbregts 《The International Journal of Life Cycle Assessment》2017,22(12):1893-1900
Purpose
The purpose of this study was to quantify the spatial and technological variability in life cycle greenhouse gas (GHG) emissions, also called the carbon footprint, of durum wheat production in Iran.Methods
The calculations were based on information gathered from 90 farms, each with an area ranging from 1 to 150 ha (average 16 ha). The carbon footprint of durum wheat was calculated by quantifying the biogenic GHG emissions of carbon loss from soil and biomass, as well as the GHG emissions from fertilizer application and machinery use, irrigation, transportation, and production of inputs (e.g., fertilizers, seeds, and pesticides). We used Spearman’s rank correlation to quantify the relative influence of technological variability (in crop yields, fossil GHG emissions, and N2O emissions from fertilizer application) and spatial variability (in biogenic GHG emissions) on the variation of the carbon footprint of durum wheat.Results and discussion
The average carbon footprint of 1 kg of durum wheat produced was 1.6 kg CO2-equivalents with a minimum of 0.8 kg and a maximum of 3.0 kg CO2-equivalents. The correlation analysis showed that variation in crop yield and fertilizer application, representing technological variability, accounted for the majority of the variation in the carbon footprint, respectively 76 and 21%. Spatial variation in biogenic GHG emissions, mainly resulting from differences in natural soil carbon stocks, accounted for 3% of the variation in the carbon footprint. We also observed a non-linear relationship between the carbon footprint and the yield of durum wheat that featured a scaling factor of ?2/3. This indicates that the carbon footprint of durum wheat production (in kg CO2-eq kg?1) typically decreases by 67% with a 100% increase in yield (in kg ha?1 year?1).Conclusions
Various sources of variability, including variation between locations and technologies, can influence the results of life cycle assessments. We demonstrated that technological variability exerts a relatively large influence on the carbon footprint of durum wheat produced in Iran with respect to spatial variability. To increase the durum wheat yield at farms with relatively large carbon footprints, technologies such as site-specific nutrient application, combined tillage, and mechanized irrigation techniques should be promoted.113.
Sajad Harounabadi Parvaneh Eghbali Shamsabad Seyyed Khalil Shokouhi Mostafavi Seyed Mansour Meybodi 《Russian Journal of Marine Biology》2016,42(1):36-41
Due to the constant increasing of bacterial resistance against known antibiotics, it is now necessary to find new sources of antimicrobials including the marine environment. The aim of this study was to evaluate antimicrobial activity of bacterial strains isolated from different coastal regions of the Caspian Sea and to provide phylogenetic analyses of antibiotic producing strains. Water samples collected from the Caspian Sea were serially diluted and plated on selective media. Isolates were tested against a panel of reference strains (Streptococcus pyogenes, Staphylococcus aureus, Escherichia coli, and Pseudomonas aeruginosa) by microbial antagonism and disc diffusion assay. Unweighted Pair Group Method with Arithmetic Mean (UPGMA) method was also employed to produce a phylogenetic tree based on 16S rDNA sequences. Amongst 162 isolates, 8 strains (4.93%) showed antibacterial activity. Isolated bacteria displayed more activity against gram-positive bacteria than gram-negative bacteria. Moreover, the 16S sequences obtained for the 8 selected strains were compared using a BLAST algorithm and allowed us to determine the strains genus as followed: Bacillus (RS28, RS54, RS56, RS82, RS116, and NS53), Brevundimonas (RS32), and Arthrobacter (NS25). The findings of the present study recommend that culturally marine bacteria collected from the Caspian Sea might be a potent source of novel bioactive compounds such as antibiotics. 相似文献
114.
115.
M. -R. Rafiee A. Sokhansanj M. -A. Naghizadeh A. Farazmand 《Russian Journal of Genetics》2009,45(8):969-973
The molecular genotyping of individuals and reconstruction of kinship through short and highly polymorphic DNA markers, so
called short tandem repeats (STR), has become one of the important and efficient methods in anthropology studies and forensic
science. Although many populations have been analyzed, no study has yet been carried out on Sadat populations who are putative
descendents of Prophet Mohammad (peace be upon him). Polymorphisms of 6 Y-STR loci (DYS19, DYS385a/b, DYS389II, DYS390, DYS392,
and DYS393) have been studied in an unrelated population of Sadat males. The aim of this study was to find possible similarities
within Sadat males, resided in Iran. Among Sadat, DYS385b was proved to be the most polymorphic (GD = 0.8588), and DYS392
showed the lowest polymorphism (GD = 0.3527). In 50 samples, 45 different haplotypes were found, of which 39 haplotypes were
unique. In the study, three samples had multi-allelic patterns. Haplotype diversity, in regard to these 7 markers was 0.9942. 相似文献
116.
Zamani Elham Parviz Mohsen Roghani Mehrdad Hosseini Marjan Mohseni-moghaddam Parvaneh Nikbakhtzadeh Marjan 《Molecular biology reports》2020,47(12):9271-9277
Molecular Biology Reports - Many evidence confirms that amyloid beta 1–42 fragment (Aβ1–42) causes neuroinflammation, oxidative stress, and cell death, which are related to... 相似文献
117.
118.
Saeed Zahedi Alireza Mirvaghefi Maryam Rafati Gholamreza Rafiee Bagher Mojazi Amiri Mehdi Hedayati 《Marine and Freshwater Behaviour and Physiology》2014,47(4):253-264
This study reports the 96-h LC50 value and tissue copper (Cu) levels and biochemical changes in juvenile fish (Acipenser persicus) exposed to 0.026?mg/l ambient Cu for 1, 7 and 14?days. It then examined the recovery of the same parameters after placing the juvenile fish in clean water for a further period of 28?days. The intestine, kidney and gill Cu levels, plasma glucose, total protein, triglyceride, cortisol, triiodothyronine and thyroxine concentrations, liver protein contents, liver catalase, superoxide dismutase (SOD) and glutathione S-transferase activities were studied. The 96-h LC50 value of Cu was 0.502?mg/l for juvenile A. persicus. The results indicate that Cu exposure produced significant accumulations of Cu in gills and kidney over the treatment time. Sublethal dose of Cu resulted in a short-term increase in plasma glucose, total protein and cortisol levels that decreased with time. After the 28-day recovery phase, there were significant differences in kidney Cu levels and triglyceride concentrations as well as SOD activities between recovery fish treatments and their control groups on day 42. The 28-day recovery phase caused significant decreases in total protein levels and SOD activities of Cu-exposed fish on day 42 compared to day 14. The results suggest that 28?days are insufficient for complete recovery to Cu exposure by juveniles and a longer period would be required for full recovery. Moreover, the study showed that the recovery phase following Cu exposure could change biochemical parameters to levels that are not close to those seen during exposure or control levels. 相似文献
119.
Maryam Hosseini Maryam Lotfi-Shahreza Parvaneh Nikpour 《Journal of cellular and molecular medicine》2023,27(5):714-726
DNA methylation is an early event in tumorigenesis. Here, by integrative analysis of DNA methylation and gene expression and utilizing machine learning approaches, we introduced potential diagnostic and prognostic methylation signatures for stomach cancer. Differentially-methylated positions (DMPs) and differentially-expressed genes (DEGs) were identified using The Cancer Genome Atlas (TCGA) stomach adenocarcinoma (STAD) data. A total of 256 DMPs consisting of 140 and 116 hyper- and hypomethylated positions were identified between 443 tumour and 27 nontumour STAD samples. Gene expression analysis revealed a total of 2821 DEGs with 1247 upregulated and 1574 downregulated genes. By analysing the impact of cis and trans regulation of methylation on gene expression, a dominant negative correlation between methylation and expression was observed, while for trans regulation, in hypermethylated and hypomethylated genes, there was mainly a negative and positive correlation with gene expression, respectively. To find diagnostic biomarkers, we used 28 hypermethylated probes locating in the promoter of 27 downregulated genes. By implementing a feature selection approach, eight probes were selected and then used to build a support vector machine diagnostic model, which had an area under the curve of 0.99 and 0.97 in the training and validation (GSE30601 with 203 tumour and 94 nontumour samples) cohorts, respectively. Using 412 TCGA-STAD samples with both methylation and clinical data, we also identified four prognostic probes by implementing univariate and multivariate Cox regression analysis. In summary, our study introduced potential diagnostic and prognostic biomarkers for STAD, which demands further validation. 相似文献
120.
Parvaneh Nasezadeh Farshad Shahi Mohammadjavad Fridoni Enayatollah Seydi 《Free radical research》2017,51(9-10):828-837
Mitochondrial damage and oxidative stress are known to contribute to the pathogenesis of noise-induced hearing loss (NIHL). In this study, we examined the protective effect of O2/O3 mixture (ozone/oxygen) therapy against mitochondrial induced damage and oxidative stress by noise exposure in rat brain and cochlear. For this purpose, rats were divided into four groups: 1 – control group; 2 – noise-exposed group (100?dB); 3 – noise?+?O2/O3, and 4 – O2/O3 (30 µg/ml). After 14 d, animals were anesthetised. Rat brain and cochlear tissue were removed for evaluation of the histopathological damages, oxidative stress, and mitochondrial dysfunction in both tissues. Our findings indicated that noise caused pathological damage, oxidative stress, and mitochondrial dysfunction in rat brain and cochlear. Also, daily administration of an O2/O3 therapy (30 µg/ml intravenous) efficiently increased enzymatic and non-enzymatic antioxidant in brain and cochlear that this action led to inhibition of pathological damages, oxidative stress, reactive oxygen species formation, mitochondrial membrane potential (MMP) collapse, mitochondrial swelling, and cytochrome c release resulting from noise. These findings suggest that the moderate O2/O3 therapy enhances the capacity of enzymatic and non-enzymatic antioxidant in brain and cochlear that protects against NIHL. 相似文献