توجه: محتویات این صفحه به صورت خودکار پردازش شده و مقاله‌های نویسندگانی با تشابه اسمی، همگی در بخش یکسان نمایش داده می‌شوند.
۱Single Base Extension and Fourier–Transform Infra–Red Spectroscopy Techniques; Further Approaches in Discriminating Hazelnut–Adulterated Olive Oil
اطلاعات انتشار: Iranian Journal of Biotechnology، يازدهم،شماره۳(پياپي ۴۳)، ۲۰۱۳، سال
تعداد صفحات: ۷
Background: Confirmation of olive oil authenticity and particularly virgin olive oil has a great importance. Several advanced chemical and genetic analyses have been used to monitor especial components; however، each has its limitations especially when detecting hazelnut–adulterated olive oil..Objectives: The objective of this research was to assess the presence of trace amount of hazelnut oil in olive oil (less than 10%) by Single Base Extension (SBE) and Fourier Transform InfraRed Spectroscopy (FTIR)..Materials and Methods: The study was based on the analysis of chloroplast DNA sequences using SBE to detect Single Nucleotide Polymorphisms (SNPs) in highly preserved DNA regions among olive and hazelnut species to differentiate pure and adulterated olive oil by means of two parallel tools; ABI PRISM sequencing and AcycloPrime Single Nucleotide Polymorphism Detection. Fourier –Transform InfraRed technique was used for FTIR spectrum comparisons of pure olive oil and hazelnut–adulterated one، as well..Results: Total DNA was extracted successfully from pure and hazelnut–adulterated olive oil، and it provided properly acceptable amplification with the primers designed on chloroplast region of both species and their admixture oil in different ratios; 50: 50، 70: 30، and vice versa. However، for lesser than 10% hazelnut oil in olive oil only SBE analysis provided recognizable results. FTIR spectra of oil samples were assessed at frequency regions of 4000 – 700 cm –1. Eight wave numbers (3007، 1373، 1237، 1120، 1098، 1032، 965، and 722 cm –1) of eleven differentiating ones were selected as candidate wave–numbers to distinguish pure and adulterated olive oil..Conclusions: SBE technique proved to be an effective strategy to verify olive oil authenticity، especially from hazelnut–adulterated olive oil. However، FTIR technique provided trustable results only when higher than 10% hazelnut oil is present in olive oil..

۲Karyotypic Variation of the Aloe vera L. and Aloe littoralis Baker in Iran
اطلاعات انتشار: Iranian Journal of Biotechnology، يازدهم،شماره۴(پياپي ۴۴)، ۲۰۱۳، سال
تعداد صفحات: ۵
Background: We describe karyotypic variations and the in vitro methods for plant propagation and conservation as well as detailed chromosomal analysis of (Aloe vera L.) and Aloe littoralis from Iran during flowering stage..Objectives: This karyotypic was discovered because of a difference in the position of the chromosome and due to genomic differentiation in domesticated populations of the Iranian species. We show that highly conserved ortho selected karyotype in (Aloe vera L.) both in in vivo and in vitro grown cultivars..Materials and Methods: Cytological investigation of Aloe littoralis in vitro grown plants revealed its tetraploid nature. Chromosome behaviors in miosis cell division were studied in one hundred cells and the populations and the parameters such as number and type of formed chiasmas were recorded..Results: Despite the large size of the chromosomes, the most portions of the observed chiasmata were one chiasma per pairs of homologes. A population of Aloe littoralis showed high level of four chiasmata. The percentage of pollen viability is high in both (Aloe vera L.) and Aloe littoralis, yet the flowers failed to form fruits..Conclusions: This finding, in combination with regional differences in the frequency of the karyotype, has important values for future studies using Aloe spices..
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