Fishing trend and fisheries potential analyses for the Persian Gulf and Sea of Oman, 1973-2003

Catch data from Persian Gulf and Sea of Oman during 1973 to 2001 were used to assess the state of the fishery development in these ecosystems. Also, fishery trends were analyzed to determine catch fluctuations during the period. Catch trend for each species from 1997 to 2003 was analyzed and fishing potential of the species for the following year was predicted. Based on the assessments, we can summarize fishing development in the southern waters of Iran into three periods: undeveloped, rapid development stage and developed stage. The undeveloped stage continued till early 1981, continued by a rapid stage until 1997, reaching to maximum level of at this year and continuing ever since. Catch trend analyses for each species during 1997 to 2003 showed different patterns for each species depending on its economic value. However, the mean catch of all species showed a sustainable trend in the two marine ecosystems. It is concluded that the catch quantity for most of the species have already reached a maximum level. Therefore, in order to keep fisheries sustainable in the region, excess fishing should be avoided

Gastrointestinal microflora of captured stellate sturgeon (Acipenser stellatus, Pallas, 1771) from Southeast Caspian Sea, Iran

Acipenser stellatus is one of the most invaluable species of Sturgeon fishes in the world. The purpose of this study was to identify the resident microbial community from the gastrointestinal tract (GIT) of Acipenser stellatus. One hundred and twenty three fungi were isolated from the GIT of 7 Acipenser stellatus samples including Aspergillus spp (45.5%), Trichoderma spp (8.9%) and Cladophialophora spp (8.1%). Among different Aspergillus isolates, A. niger was the predominant species. Although, fungi were predominantly isolated from stomach (36.6%), but with respect to frequency of fungal isolates there were no significant differences between stomach and other parts of GI. In general, the bacterial isolates recovered were mostly gram negative and related to Enterobacteriaceae family such as Aeromonas, Pseudomonas and Salmonella species. The most bacterial species were isolated from intestine and pre stomach region (88.2%). It is concluded that A. niger and Aeromonas species were predominant fugal and bacterial microbes isolated from understudy fish GIT, respectively

Endoscopic mucosal resection: still a reliable therapeutic option for gastrointestinal neuroendocrine tumors

Background: Neuroendocrine tumors (NETs), as a rare and heterogeneous category of solid tumors, feature various morphologies and behaviors. In recent years, the incidence of NETs has continued to increase. Endoscopic mucosal resection (EMR) is one of the therapeutic modalities for the treatment of gastric and rectal NETs. Methods: We evaluated patients with well-differentiated NETs of the stomach, duodenum, or rectum between 2011 and 2018. In this study, all cases with tumors confined to the mucosal or submucosal layers and smaller than 20 mm were resected using the EMR technique. We used EUS, CT scan, or MRI to exclude patients with advanced disease. All patients were actively monitored for recurrence according to the recommended protocols. Results: A total of 36 patients with NETs entered the study; 17 (47.2) were female and the remaining 19 (52.8) were male, with a total age range of 20�74 years (mean: 52.47 ± 13.47 years). Among the tumors, 31 cases (86.1) were G1 and the remaining 5 (13.9) were G2. Based on the pathology reports, 22 tumors (61.1) were smaller than 1 cm, while the remaining 14 (38.9) were between 1�2 cm. Twenty-two patients (61.1) had a margin of specimen involved with the tumor. No recurrence was observed during the mean follow-up time of 63.5 ± 19.8 months (range: 39�103 months). All 36 cases survived during the study period. Conclusion: Conventional EMR procedure provides low chance of R0 (complete resection) achievement in gastrointestinal NETs smaller than 20 mm and limited to the mucosa or sub mucosa. However, it could be an option if patients are closely followed. Postoperative marginal involvement is not a reliable predictor of disease recurrence, which may be explained by the deleterious effect of heat coagulation and cauterization applied during tumor removal. © 2021, The Author(s)

Designing and establishment of ISO/IEC 17025 in 3aboratories of Caspian Sea ecological research center

The project was carried out between March of 2007 and November of 2009.Five laboratories of research center (Clinical pathology, Plankton, Molecular genetics, Pollutants, Analysis Instrument were selected for accreditation. The main stages for establishment of the system consisted of: 1-Conducting a gap analysis to compare the present state of the laboratories with ISO/IEC 17025 Training 2 General requirements for the competence of testing and calibration laboratories Validation of methods Estimation of uncertainty Internal audits 3- Performing of technical and management requirements 4-Submit of quality manual to Iran Accreditation System (IAS) in order to accredit In January of 2010 the laboratories were accredited by Iran Accreditation System (IAS). The main results were including: 1-Increase the accuracy of measurement 2-Improvement of the Repeatability and Reproducibility of the test methods 3-Traceability and standardization of test methods 4- Calibration of measurement instruments 6- Updating of test methods 7-Standardization of physical condition of the laboratories 8- Getting the certification from Iran Accreditation System (IAS)

The fifth developing plan of Iranian Fisheries Research Institute

Accurate scientific and practical plan for achieving the goals of the Islamic Republic of Iran within the framework of Vision development 1404, is the infrastructure achieving sustainable development of the country. Order to achieve the above mentioned objectives and in order to the comprehensive development plans in the country, Iranian fisheries research organization adjust the fifth developing plan for support of executive related departments in country with mobilization a large number researchers consists of several working groups of ifro affiliated research centers. The fifth developing plan consist of three chapters for report of the forth developing plan and intrudction of research, construction plans and financial support (budjet) for period of 2011-2014 A.C

Multiplicity dependence of inclusive J/psi production at midrapidity in pp collisions at root s=13 TeV

Measurements of the inclusive J/psi yield as a function of charged-particle pseudorapidity density dN(ch)/d eta in pp collisions at root s = 13 TeV with ALICE at the LHC are reported. The J/psi meson yield is measured at midrapidity (vertical bar y vertical bar <0.9) in the dielectron channel, for events selected based on the charged-particle multiplicity at midrapidity (vertical bar eta vertical bar <1) and at forward rapidity (-3.7 <eta <-1.7 and 2.8 <eta <5.1); both observables are normalized to their corresponding averages in minimum bias events. The increase of the normalized J/psi yield with normalized dN(ch)/d eta is significantly stronger than linear and dependent on the transverse momentum. The data are compared to theoretical predictions, which describe the observed trends well, albeit not always quantitatively. (C) 2020 European Organization for Nuclear Research. Published by Elsevier B.V.Peer reviewe

First measurement of Ωc0 production in pp collisions at s=13 TeV

The inclusive production of the charm–strange baryon 0 c is measured for the first time via its hadronic √ decay into −π+ at midrapidity (|y| &lt;0.5) in proton–proton (pp) collisions at the centre-of-mass energy s =13 TeV with the ALICE detector at the LHC. The transverse momentum (pT) differential cross section multiplied by the branching ratio is presented in the interval 2 &lt; pT &lt; 12 GeV/c. The pT dependence of the 0 c-baryon production relative to the prompt D0-meson and to the prompt 0 c-baryon production is compared to various models that take different hadronisation mechanisms into consideration. In the measured pT interval, the ratio of the pT-integrated cross sections of 0 c and prompt + c baryons multiplied by the −π+ branching ratio is found to be larger by a factor of about 20 with a significance of about 4σ when compared to e+e− collisions

Elliptic flow of charged particles at midrapidity relative to the spectator plane in Pb–Pb and Xe–Xe collisions

Measurements of the elliptic flow coefficient relative to the collision plane defined by the spectator neutrons v2{ SP} in collisions of Pb ions at center-of-mass energy per nucleon–nucleon pair √ 2.76 TeV and Xe ions at √ sNN = sNN =5.44 TeV are reported. The results are presented for charged particles produced at midrapidity as a function of centrality and transverse momentum for the 5–70% and 0.2–6 GeV/c ranges, respectively. The ratio between v2{ SP} and the elliptic flow coefficient relative to the participant plane v2{4}, estimated using four-particle correlations, deviates by up to 20% from unity depending on centrality. This observation differs strongly from the magnitude of the corresponding eccentricity ratios predicted by the TRENTo and the elliptic power models of initial state fluctuations that are tuned to describe the participant plane anisotropies. The differences can be interpreted as a decorrelation of the neutron spectator plane and the reaction plane because of fragmentation of the remnants from the colliding nuclei, which points to an incompleteness of current models describing the initial state fluctuations. A significant transverse momentum dependence of the ratio v2{ SP}/v2{4} is observed in all but the most central collisions, which may help to understand whether momentum anisotropies at low and intermediate transverse momentum have a common origin in initial state f luctuations. The ratios of v2{ SP} and v2{4} to the corresponding initial state eccentricities for Xe–Xe and Pb–Pb collisions at similar initial entropy density show a difference of (7.0 ±0.9)%with an additional variation of +1.8% when including RHIC data in the TRENTo parameter extraction. These observations provide new experimental constraints for viscous effects in the hydrodynamic modeling of the expanding quark–gluon plasma produced in heavy-ion collisions at the LHC

Determining of Methamphetamine Effects on Sperm Parameters of Mature Rat

Abstract: Introduction: Methamphetamine (MAMP) is a central nervous system stimulant, but it is increasingly abused as a psychedelic tablet by teenagers and young adults. In this experimental study, we evaluate the effects of MAMP on sperm parameters of mature rat. Methods: MAMP or saline were injected in three experiments as follow: In the first experiment, twenty-four rats were injected one time with 10mg/kg MAMP, and sperms were sampled from tail of epididymis 6, 12, 24, 48, 72, and 168 h after injection (n=4, at each time). Six rats injected with saline served as controls. In the second experiment, four groups of rats each consisting of four rats were administered MAMP (5, 10 and 15 mg/kg) or saline, respectively, and examined 24h later. In the third experiment, 16 rats were evenly divided into four groups (1, 5, and 10 mg/kg MAMP and control) and were injected MAMP or saline once daily for 14 consecutive days (spermatogenesis period) and sperms were sampled 24 h after the last injection. The motility, concentration and morphology of the sampled sperms were evaluated. We also measured the body and testis weights and used the testis/body weight ratio as an index at the end of each experiment. Results: At 24 and 48 h after injection with a single dose of 10 mg/kg MAMP, the number of sperms decreased significantly in comparison with controls (P≤0.001 and P≤0.05 respectively). In the second experiment, the number of sperms for three doses of MAMP significantly decreased in the two upper doses (P<0.001) and in the lower dose (P≤0.05). The results of the third experiment were similar but the decrease of sperms number was more than that in the second experiment. MAMP did not change the testis/body weight ratio in the first and second experiments, but it significantly decreased this index in rats of the third experiment which received 10 and 5 mg/kg MAMP daily. We did not observe differences between experimental and control groups in motility and morphology of sperms. Conclusion: Our results indicate that the repeated administration and/or higher doses of MAMP reduce the number of mature sperms in the tail of epididymis and have adverse effects on the reproduction and fertility of MAMP users. Keywords: Methamphetamine, Sperm parameters, Epididymis, Ra

A report of unusual diffuse nodular lesions in intestines of lambs with coccidiosis

Ovine and caprine coccidiosis has always been regarded as one of the important diseases with high morbidity and economic losses such as weight loss, death and costs of treatment and control. In a sheep farm, 4 sick newborn lambs (out of 10 lambs) with the age of 1 to 2 months died with clinical signs of weight loss, loss of appetite, yellowish diarrhea, fever, ruffled wool, contamination of tail and perineal area to diarrheic stool and abdominal pain at the touch of abdomen. At necropsy on one lamb, multiple and diffuse nodular hyperplastic lesions yellowish-white in color were seen in the mucosal surface of jejunum. Microscopically, in addition to hyperplasia of the small intestinal villi, various developmental stages of Eimeria were observed. Based on morphological characteristics and presence of numerous polyp like formations in small intestine, the involved protozoan species was determined as Eimeria bakuensis. The relatively high case fatality rate in this flock could be related to sever nodular lesions in the small intestines, age and immune status of the affected animals