Evalution of genetic different between Litopenaeus vannamei of different race

In this study, after determining history of origin entering white leg shrimp of broodstocks at hatcheries of country, finally, two population of Molokaei and High health were considered as shrimp broodstocks of specific disease free (SPF) zero generation. After inbreeding and cross breeding among adult males and females of two population above, three storage different were produced in the first generation: H♂ × M♀, M♂ × H♀ and H♀ × H♂. The second generation were produced from selective breeding of M♂ × H♀. The aim of this study was to determine genetic differences between different generations of specific pathogenic free shrimp by evaluation of 16S rRNA region mitochondrial of different generations. Result of this study showed that of 486 sites have been identified 484 sites were conserved. Also, monomorphic sites ranged between 482 - 486 sites and was consists 2 polymorphic sites and 2 transitional sites. The number haplotypes, haplotypes diversity, nucleotide diversity revealed in this region were 2, 0.356±0.159 and 0.00147, respectively. Due to the high genetic identify and reduce of genetic distance of shrimp between different generations of SPF shrimp, genetic differentiation and gene flow (Nm) between them were -.142 and -2.00, respectively. This rates clearly shows a low level of polymorphism in this region of mitochondrial of different generation of SPF. This may be occurred because of small effective populations and genetic drift. Thus, offspring had inherited mitochondrial genome from your mother, therefore, it is expected that rate of variation in this genome is influenced by several factors, including genetic drift, due to unavailability of new-broodstock from different areas. It was observed that due to high conservation sites in 16S rRNA region of mitochondrial genome, nothing genetic differentiation was observed among different generations of SPF

Culture-proven endogenous endophthalmitis: microbiological and clinical survey

Purpose: To report causative organisms, visual outcomes, and associated medical conditions in endogenous endophthalmitis (EE). Methods: Microbiological and medical reports of patients with culture-proven EE referred to Farabi Eye Hospital, Tehran, Iran, from January 2008 to January 2018 were reviewed. Results: A total of 144 cases (171 eyes) were included in the present study. Candida albicans (30.6) and Staphylococcus aureus (27.1) were the most prevalent microbial causes. Diabetes mellitus (43.8) and IV drug abuse (10.4) were the leading associated systemic conditions. Age of the patients (P = 0.002) and presenting corrected distance visual acuity (CDVA) (P < 0.001) were correlated with postoperative CDVA. Patients with bilateral involvement had significantly lower mean logMAR (P = 0.002), and patients with hypopyon had significantly higher mean logMAR (P = 0.006). Eyes with gram-negative bacillus cultures had a significantly worse logMAR than eyes with gram-positive cocci (P = 0.009). Conclusion: Candida albicans and S. aureus were the most common causes of EE, and diabetes mellitus was the most common associated medical condition. EE is associated with poor visual outcome, especially in older patients, those with worse visual acuity at presentation, and those with positive cultures for gram-negative bacilli. © 2020, Springer Nature B.V

J/ψJ/\psi, ψ′\psi' and Drell-Yan production in S - U interactions at 200 GeV per nucleon

A detailed study of $J/\psi, \psi'$ and Drell-Yan production in S - U collisions has been performed by experiment NA38 at the CERN SPS. This paper presents production cross sections and their centrality dependence, based on the largest sample of S - U events collected by the experiment

J/ψ\psi and ψ′\psi' production in p, O and S induced reactions at SPS energies

The production of the \jpsi\ and \psip\ charmonia states has been studied, through their dimuon decay, in proton, Oxygen and Sulphur induced reactions, by the NA38 experiment at the CERN SPS. The proton data was collected with beams of 200 and 450~GeV, while the ion beams had an energy of 200~GeV per incident nucleon. The \jpsi\ production cross-section per nucleon-nucleon collision exhibits a remarkably continuous pattern, as a function of the product of the mass numbers of the interacting nuclei, from pp up to S-U reactions. The same pattern is observed within S-U collisions, as a function of the collision centrality. While in p-A interactions both charmonia states exhibit the same A-dependence, in \mbox{S-U} collisions the \psip\ production is very strongly suppressed

Dimuon enhancement in nucleus-nucleus ultrarelativistic interactions

The study of muon pairs in the mass region $1.5<M_{mumu}<2.5$GeV/c$^2$ in 450 GeV/c p-A, 200 GeV/nucleon S-U and 158 GeV/nucleon Pb-Pb collisions is presented. ~In p-A interactions, the dimuon signal mass spectra are well described by a superposition of Drell-Yan and charmed meson semi-leptonic decay contributions, in agreement with previous experiments when considering a linear A dependence. In nucleus-nucleus reactions, taking only into account these two physical ingredients, a dimuon enhancement both with increasing A$cdot$B and centrality is observed