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Disorders of Liver : The Role Of Germinative Layer In Inducing Hydatid Cyst
( Seyed Vahid Hosseini ),( Soheal Mansoorian ),( Seyed Mahmood Sadjjadi ),( Davood Mehrabani ),( Zahra Barzin ),( Nader Tanideh ),( Afshin Amini ),( All Rafati ),( Masoud Amini ) 대한소화기학회 2007 SIDDS Vol.9 No.-
Background/Aims: In spite of use of protoseololeidal agents during surgery, a notable rate of recurrence of disease in post-operation patients is still observed. The question exists is that alive scolices would cause any recurrence or is due to the presence of the germinative layer. The aim of this study was to evaluate the effect of scolicidal agents on this layer as well as its ability of the layer to produce any hydatid disease in an in vivo condition. Methods: Germinative layer of hydatid cyst was separated under sterile condition, was divided into 0.5 cm parts, exposed to various protoseolicidal agents for 2 minutes, and implanted in peritoneal cavity of 62 BALB-C mice. After 9 months, the peritoneum was evaluated macroscopically and microscopically for the presence of any hydatid disease. Results: After 9 months, no hydatid disease was visible in the peritoneum of all the sixty two mice. Conclusions: In this study, the germinative layer could not cause any hydatid disease but positive results of Tarakanovet al. with cultures of protoseolices and the germinative layer cells in the peritoneal cavity mice indicate to a need of another study of implantation of culture cells of the germinated layer lacking protoscolices in a larger animal study to clarify the differences.
Tidal Asymmetry in a Tidal Creek with Mixed Mainly Semidiurnal Tide, Bushehr Port, Persian Gulf
Seyed Taleb Hosseini,Vahid Chegini,Masoud Sadrinasab,Seyed Mostafa Siadatmousavi,Sadegh Yari 한국해양과학기술원 2016 Ocean science journal Vol.51 No.2
This study investigated the tidal asymmetry imposed by both the interaction of principal tides and the higher harmonics generated by distortions within a tidal creek network with mixed mainly semidiurnal tide in the Bushehr Port, Persian Gulf. Since velocity and water-level imposed by principal triad tides K1-O1-M2 are in quadrature, duration asymmetries during a tidal period in this short, shallow inverse estuary should be manifest as skewed velocities. The principal tides produce periodic asymmetries including a strong ebb-dominance and a weak flood-dominance condition during spring and neap tides respectively. The higher harmonics induced by nonlinearities engender a flood-dominance condition where the convergence effects are higher than frictional effects, and an ebbdominance condition where intertidal storage are extended. Since the triad K1-O1-M2 driven asymmetry is not overcome by higher harmonics close to the mouth, the periodic asymmetry dominates within the creek in which higher harmonics reinforce the weak flood-dominance (strong ebb-dominance) condition in the convergent channel (divergent area). Also, the maximum flood and the maximum ebb from all harmonic constituents occurred close to high water slack time during both spring and neap tides in this short creek. Since occational wetting of intertidal areas happened close to the high water (HW) time during spring tide, the water level flooded slowly close to the HW time of the spring tide.
Vahid Pirouzfar,Mohammad Reza Omidkhah,Abdolsamad Zarringhalam Moghaddam,Seyed Saeid Hosseini 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.3
In this study, properly designed experiments are utilized to improve and optimize the main parametersincluding the selection of precursors with different molecular structures, blend composition ofprecursors and conditions of carbonization. Optimum conditions are met for UIP-R/PBI, at blendcomposition of 94% and pyrolysis temperature of 620 ℃ at 10-7 Torr. Under such conditions, the modelestimated permeability of CH4 and CO2 equal to 26.7 and 310 Barrer, while measured selectivityresponses of CO2/CH4 is 77.5, respectively. As a result, greater values of separation efficiency are achievedin the range of 0.88–0.97 polyimide content in these blends.
( Syed Vahid Hosseini ),( Seyed Mahmoud Adjjadi ),( Davood Mehrabani ),( Kurosh Ghanbarzaden ),( Zahra Barzin ),( Nader Tanideh ),( Masoud Amini ) 대한소화기학회 2007 SIDDS Vol.9 No.-
Background/Aims: The treatment of choice for Hydatidosis is surgery, but before evacuation of a cyst, protoscolicidal agents are needed to be injected to prevent a secondary cyst formation and the spreading of the disease. This study was performed to determine the protoseolicidal effect of various concentrations of hypertonic glucose in an animal model infected to hydatid cyst. Methods: Sheep liver hydatid cyst surface were sterilized by heat and the cyst contents were evacuated completely and transferred into falcon tubes, where protoscolices were precipitated and separated. The viability of protoseolices was determined by using eosin stain method. A total of 1500 protoscolices were exposed to 0.5% cetrimide, 0.5% silver nitrate, 0.9% and 20% sodium chloride and 10%, 15%, 25%, and 50% concentrations of glucose with exposure times of one, 2 and 5 minutes and were injected into the peritoneal cavity of 5 BALB/c mice for each agent. The animals were kept for 9 months and then were autopsied. Blood sample for countercurrent immunoelectrophoresis (CCIEP) was provided and the animals were examined for presence of any cyst in peritoneal cavity and recorded. Results: A total of 40 BALB/C mice were used in all exposure times while 24, 21 and 32 mice survived when exposed to different protoscilicidal agents after 1, 2 and 5 minutes respectively. None of the mice were infected to cysts after exposure to 50% hypertonic glucose solution. Identical to 50% glucose solution no infection was noticed for 0.5% cetrimide and 20% sodium chloride solutions too. The CCIEP results of animals indicating to cyst formation confirmed the presence of antibody in the circulation. Conclusions: Similarity of 50% glucose solution and cetrimide and 20% sodium chloride in complete killing of protoscolices present it as potent protoscolicidal agent and the side effects of cetrinide and hypertonic sodium chloride indicate to further studies on probable side effects.
Experimental study of fine center electrode spark plug in Bi-fuel engines
Saeed Javan,Syed Shahabodin Alaviyoun,Seyed Vahid Hosseini,F. OMMI 대한기계학회 2014 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.28 No.3
In the present work, the erosion of platinum fine center electrode spark plugs and conventional nickel plugs are investigated in a gasolineand natural gas bi-fuel engine. The effect of electrode erosion is evaluated by comparing the required ignition voltage and cold startability of the different plug designs. After durability tests, platinum fine center electrode plug had insignificant electrode erosion andnegligible gap growth; whereas the nickel plug had notable erosion and gap growth. There was no detectable side sparking for fine centerelectrode plugs. In terms of performance, the required ignition voltage of fine center electrode plug was lower than conventional sparkplug. Also, results of a cold start test demonstrated that the starting time of the engine with fine electrode plugs was lower than conventionalspark plugs. The surface of electrodes was studied by the scanning electron microscope and the energy dispersive X-ray spectroscopytechniques. Cracking and peeling was observed on the surface of the nickel conventional electrodes, but not on the surface of theplatinum fine electrodes. These tests show that platinum fine center electrodes could be suitable for gasoline/natural gas bi-fuel engines tomeet long lifetime demand.
Ghaem, Haleh,Amiri, Zahra,Kianpour, Fatemeh,Rezaianzadeh, Abbas,Hosseini, Seyed Vahid,Khazraei, Hajar Asian Pacific Journal of Cancer Prevention 2016 Asian Pacific journal of cancer prevention Vol.17 No.7
Background: The goal of this study was to compare the rate of recurrence and occurrence of complications in colorectal cancer patients after two kinds of laparoscopy and laparotomy. Materials and Methods: A follow-up study was carried out among 358 patients who suffered from colorectal cancer from 2012-2014. The data were gathered from colorectal research center in Shiraz, Shahid Faghihi hospital, and analyzed using the chi-square test, logistic regression, and multinomial regression. Results: The average age of these patients was $56.3{\pm}14.6$, 55.0% being men. Moreover, 57.8% of them underwent laparoscopy surgery and 42.2% of the patients underwent laparotomysurgery and the conversion rate was 58.0% which ultimately was put under the category of laparotomy surgery. After biennial median follow-up, differences in the occurrence of complications such as bleeding (hemorrhage), fever, intestine blockage and wound infection in these two kinds of surgery werestatistically significant (P<0.05). However, the rate of recurrence and the patients' ultimate status (alive without disease, alive with disease, and death) did not significantly differ between these two surgery groups. Conclusions: Post-operation complications were laparoscopy surgery were less than those in laparotomy. However, the outcomes such as patients' ultimate status and recurrence were similar between the two groups.
Leila Vafa,Masoud Amini,Hooman Kamran,Ladan Aghakhani,Seyed Vahid Hosseini,Zahra Mohammadi,Neda Haghighat 한국임상영양학회 2023 Clinical Nutrition Research Vol.12 No.1
Studies indicate an association between hyperuricemia (HUA) and metabolic syndrome risk factors. On the other hand, obesity is a major modifiable and independent risk factor for HUA and gout. However, evidence concerning the effects of bariatric surgery on serum uric acid levels is limited and not completely clarified. This retrospective study was carried out with 41 patients who underwent sleeve gastrectomy (n = 26) and Roux-en-Y gastric bypass (n = 15) from September 2019 to October 2021. Anthropometric, clinical, and biochemical data, including uric acid blood urea nitrogen and creatinine fasting blood sugar (FBS), serum triglyceride (TG), and serum cholesterol, high-density lipoprotein (HDL), low-density lipoprotein (LDL), were measured preoperatively and postoperative 3, 6 and 12 months. From baseline to 6 and 12 months, bariatric surgery resulted in a significant decrease in serum uric acid of patients with severe obesity (p < 0.001). The decreases in serum FBS, TG, and cholesterol of patients were significant during 6 and 12 months of follow-up (p < 0.05). However, the HDL increase of patients was not statistically significant in 6 and 12 months (p > 0.05). Besides, although patients’ serum level of LDL decreased significantly during the 6 months of follow-up (p = 0.007), it was not significant after 12 months (p = 0.092). Bariatric surgery significantly reduces serum uric acid levels. Therefore, it may be an effective supplementary therapy for lowering serum uric acid concentrations in morbidly obese patients.