فهرست مطالب gholamreza shahhoseini

Aquatics, including fish, have always been one of the most perishable protein sources. For increasing storage time of the resource there are several ways including radiation.  The effect of gamma irradiation was investigated on the microbial load and total volatile nitrogen of fish meat rainbow trout (Oncorhynchus mykiss). At the beginning of these experiment, the fish meat is irradiated by 1.5, 2.5 and 3.5 KGry radiation doses and subsequently transferred to the refrigerator at 4°C. During the first, seventh and fourteenth days after irradiation (after transfer to the refrigerator) the total amount of bacteria and total volatile nitrogen was investigated. The results indicated a greatly reduction of amount of bacterial load and total volatile nitrogen by the use of various doses of gamma irradiation. Among the irradiated doses, 3.5 KGry showed the greatest decrease in these parameters, but considering that there was not huge difference between 2.5 and 3.5 KGry in the reduction, thus 2.5 KGry gamma irradiation is selected as a suitable dose for rainbow trout irradiation and subsequent storage in the refrigerator.

he aim of this study was to use a microbiome enriched with ammonia and nitrite oxidizing bacteria in the rainbow trout RAS system. A bacterial microbiome containing Nitrosomonas oligotropha and Nitrobacter winogradskyi (PAN) was added to a rainbow trout culture system (50 g) in the Aquatic Laboratory of the Fisheries Department of the University of Tehran and its effect on hematological parameters (hemoglobulin, hematocrit, erythrocytes, white blood cells, MCV, MCHC, lymphocytes, monocytes, and neutrophils) and stress (cortisol and glucose) as well as water quality of rainbow trout (Oncorhynchus mykiss) in a completely randomized design. In this experiment, a negative control (NC) group was also included for comparison with the experimental group. The results showed that by using PAN microbiome, the concentration of ammonia and nitrite produced was significantly reduced and as a result, this led to a reduction in stress and a reduction in immune suppression and improved growth. Therefore, the use of this bacterial group in improving the breeding system of rainbow trout is suggested by the rainbow trout breeding system.

Maintaining proper size and rotation of components of total knee arthroplasty is mandatory for optimal longevity. Ethnical differences may affect the fitness of prostheses that were manufactured mainly based on Caucasian dimensions.
To evaluate the distal femur morphology of the Iranian population at the level of standard cuts simulated via computed tomography.
Patients and During 2013, 150 consecutive patients (96 males and 54 females) from the outpatient Department of Orthopedic Surgery of Rasoul Akram Hospital with knee CT scans were studied. We entered cases with apparent normal extremity alignment and bone maturity. Exclusion criteria were history of fracture or conditions affecting knee profile. Standard cuts were simulated on the CT scan using the Marco Pacs program. For each bone, anteroposterior (AP), mediolateral (ML), and aspect ratio (ML/AP) were measured. Values were compared with the sizing of four currently available prostheses.
The mean age of the patients was 43 years (range: 17 to 80). All isolated parameters were higher in men significantly (P Our findings may be applied by manufacturers to design prostheses more compatible with Asian populations. Alterations to the shape of components should be considered to provide optimal coverage.

Vibrio paraheamoloyticus is one the causative agents of vibriosis with high mortality in farmed fish and shrimp and under predisposing conditions. This study was aimed to assess the effect of gamma irradiation on the inactivation of V. paraheamoloyticus under fresh and freeze-dried conditions. Vials of 0.5 ml fresh culture of the bacterial suspensions at 1.5*1010 cfu/ml were subjected to 1, 1.5,2, 2.5, 3 and 4 KGy. Also, vials of 0.5 ml freeze-dried culture of the bacterial suspensions at 1.5 x 1010 cfu/ml were subjected to 2, 4, 7 and 8 KGy. The bacterial growth behavior was then evaluated on fresh medium. The obtained results showed that the minimum doses of 4 and 10 KGy were sufficient for the inactivation of fresh and freeze-dried bacteria, respectively. The result of this study shows that inactivation of V. paraheamolyicus in fresh culture condition requires below half- dosage of gamma ray required for the inactivation of the freeze- dried of bacterial cells.

Proper rotation of components in total knee arthroplasty (TKA) will largely affect the postoperative outcome. Ethnical variation may affect rotational profile. We aimed to evaluate distal femur rotation in Iranian population using transepicondylar axes. From a total of 450 knee CT scans and via consecutive sampling, 150 qualified subjects with normal lower extremities alignment were selected comprising 96 (64%) males and 54 (36%) females aging 17-80 years. The posterior condylar angle and condylar twist angles were defined as angles between either surgical epicondylar axis (line connecting lateral epicondylar prominence and the medial sulcus) or clinical epicondylar axis (line connecting most prominent points of both epicondyle) and posterior conylar line. Data were compared among genders. Average age of our samples was 43 years (ranging 11-80). Mean (±sd) values for posterior condylar angle and condylar twist angles were 2.35º(±1.34) and 5.77º(±1.70), respectively. The former variable was not discernible in twenty of our subjects because of obscure medial sulcus. Our findings were totally appeared similar to studies from other ethnicities and the observed minor differences may have originated from amount of osteoarthritis and malalignment. Overall, Iranian distal femur rotational profile was similar to other reports. Some minor observed differences may be partially due to samples’ age and different amount of knee osteoarthritis. It is proposed to rely on several methods for determining rotational profile while performing TKA. Moreover, preoperative computed tomography should be fully scrutinized especially in severely osteoarthitic knees.

As an established method of treatment for medial unicompartmental knee osteoarthritis, we aimed to evaluate results of short-term follow up of closed and open wedge high tibial osteotomy. In teaching hospital of Rasoul-e-Akram and during 2001-2009, we retrospectively surveyed docu-ments of 41 cases with osteoarthritis of the knee and genu varum deformity that underwent high tibial osteoto-my. Radiographic evaluation of knee alignment was performed using lower extremity scanogram in three measurements of preoperation, postoperation and last follow up visit (average of 2 years). Improvement of pain was assessed via visual scales. From a total of 13 closed and 28 open wedge high tibial osteotomies, the femorotibial angles were calculated varus of 7.7±2.5° preoperatively, valgus of 7±2.3° postoperatively and reached valgus of 6.1±3° at the final follow-up. In open-wedge osteotomies, loss of correction was meaningful during follow-up, mainly in patients without fixation. Higher amount of preoperative knee varus (>10°) was accompanied with more loss of correction postoperatively. About 80% of patients were satisfied of pain relief with average knee flexion of 125 degrees. Our major complications were two cases of intra-articular fracture. Open wedge cases without plate fixation experienced more failure of correction. With proper patient selection and applying appropriate technique plus sufficient correction, high tibial osteotomy can be an effective treatment for medial knee osteoarthritis with genu varum. It may diminish the need for knee arthroplasty or at least delay the surgery.

The transfer of the tibialis posterior tendon to the dorsum of foot can restore the function of the paralyzed dorsiflexor muscles of the foot and ankle. In order to reduce the wound complication in the insertion site of tendon to bone by a plantar knop we used a new method of fixation by an absorbable screw inserted dorsally. we performed this operation on 15 patients in a 3 years period. All patients had drop foot deformity due to irreversible lesions of the peroneal nerve. The inclusion criteria was the peroneal nerve palsy that was not improved after 18 months even by using nerve releasing or nerve repairing. All patients were evaluated after 6 months for ankle function and wound complications. Of 15 patients one was excluded from study. At 6 month ten patients got excellent score (66%) and 4 good score (26%) further ankle function. There was no wound complication at insertion site. This simple modification for insertion site fixation had good result in restoring ankle function whiles eliminated the possibility of plantar pressure sores caused by fixation knop.