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Articles by S. Jamshidi
Total Records ( 3 ) for S. Jamshidi
  S. Jamshidi and Md N.B. Abu Bakar
  Sound speed computation based on field observations of temperature, salinity and pressure in the Southern coastal waters of the Caspian Sea, off Babolsar port in Autumn 2008 was presented. The collected data showed a variation of sound speed between 1488 m sec-1 at the sea surface to 1460 m sec-1 at depth of 42 m in the study area. In the sea surface mixed layer, sound speed mainly ranged between 1487-1488 m sec-1. The results showed strong vertical gradient but weak horizontal gradient of sound speed in the water column. Vertical structure of sound speed indicated a sharply decreasing trend from 1488 to 1460 m sec-1 across the thermocline. The sound speed variations follow the variations in temperature, indicating strong correlation between the two parameters in the study area. Therefore, sound speed was predominantly influence by temperature rather than salinity and pressure.
  A. Arzi , S. Sarahroodi , M. Mehrabizadeh Honarmand , S. Jamshidi and M. Latifi
  Diltiazem (DTZ) is widely used in the prophylaxis of hypertension and treatment of angina. The effects of DTZ and other calcium channel blockers on memory have been discussed with several procedures and different theories have been suggested. In the present study, the effect of DTZ on retention and retrieval of memory in young and aged mice was investigated by using the passive avoidance apparatus. For this purpose, after weighting, coding and classifying the mice, they were grouped as follow: test group received electric shock plus DTZ (10 and 30 mg kg-1, i.p.), blank group received electric shock plus normal saline and control group received only electric shock. In all three groups delay time of leaving the platform for both retention and retrieval test of memory was measured. DTZ was administered immediately after receiving electric shock in the retention test, but in retrieval test DTZ was administered 24 h after receiving electric shock. The results indicated that 30 mg kg-1 of DTZ impaired retention and retrieval of young mice memory. The 30 mg kg-1 of DTZ enhanced retention while 10 and 30 mg kg-1 of it improved retrieval of aged mice memory.
  S. Jamshidi , Md N.B. Abu Bakar and M. Yousefi
  In the study, chlorophyll-a concentrations were examined using field observations by Ocean seven 316 profiler over the Southern continental shelf of the Caspian Sea near Iranian coasts. The data were collected at nine stations with a maximum depth of 117 m depth along three transects in perpendicular to the Southern coasts of the Caspian Sea, off Rudsar in Summer 2008. Amounts of the chlorophyll-a varied from 3.8 to 0.1 mg m-3 with the maximal levels at 15 m depth. The formation and destruction of seasonal thermocline affect the chlorophyll-a concentrations. Chlorophyll-a concentration sharply decreased with depth and reached around 0.1 mg m-3 near bottom.
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