Papers by shirkhan anwari
Technium Social Sciences Journal, 2021
The natural surface views of the earth's surface are actually like the broken mosaics that fo... more The natural surface views of the earth's surface are actually like the broken mosaics that formed the earth's crust. The surface of the earth is composed of different views, which is has been existed due to different internal and external forces of the earth's crust, such as destructive operations of the earth's surface, terrestrial operations, orogenic operations, folds, protrusions and number of processes that cause changes in the Earth's crust. The complexities of natural landscapes are greater than the simple buildings and flatness of the surface those collectively introduce the features of the surface. Landscapes are usually better explained by understanding the factors that cause them, because each of the terrestrial landscapes are remnants of various geomorphological factors that cannot be easily identified and need further investigation. William Morris Davis is an American geomorphologist who was the first to offer a general view of the Earth's appear...
：Objective To verify thefeasibility of eryoablation on rabbit brain tumor under interventional MR... more ：Objective To verify thefeasibility of eryoablation on rabbit brain tumor under interventional MRIguidance.Methods The procedures were performed under general anaesthesia.Twenty-two NewZealand white rabbit'S brains were inoculated with VX,tumor tissue through cranial holes.MR-guided cryoablation were conducted as preliminary experiment when diameter of braintumor grew up to 0.8 cm in size.Cryoablation lasted two cycles of 5 minutes freezing, in 2rabbits.and of 10 minutes freezing in another 2 rabbits.After procedure and MRscanning.rabbits were executed.Specimens of rabbit'S brain showed complete necrosispathologically after cryoablation of cycles of 10 minutes freezing.The optimal parametersof eryoablation were defined.Except for the two rabbits that died of infection,the other16 rabbits were divided into control group and therapeutic group.According to the optimalparameters of cryoablation,cryoablation of 10 minutes freezing were performed for rabbitbrain tumors in therapeutic group.Venous injeetion of 20%mannitol and subcutaneousinjection of dexamethasone were used for dehydration.None of rabbit brain tumors in thecontrol group were treated.After cryoablation,MRI scanning Was performed immediately,7days later,14 days later and 60 days later,to observe the ablative area and the pathologicchanges.The survival time wag recorded.Resuits Brain tumors could be found in all NewZealand white rabbits after inoculation except two died of inflammation.The maximumdiameter of brain tumors Was from 0.7 to 1.0 elEL The tumors showed slight low signal onT1WI and slight high signal on T2WI as well as comrast enhancement after injection ofGd-DTPA.Pathologically coagulative necrosis were observed after cryoablation immediately,7days and 14 days later,and liquefactive necrosis was found 60 days later.The correlationbetween MRI and pathologic appearance of tmnors are consistent.The therapeutic area rangedfrom 1.0 to 1.5 em.,The maximium diameter of ice ball ranged from 1.5 to 2.0 cm ConclusionCiToablation for brain tumor iS a safe and feasible therapy.
Aside from the issues peace and stability, one of Afghanistan’s most vital needs is safe and reli... more Aside from the issues peace and stability, one of Afghanistan’s most vital needs is safe and reliable supplies of water. But Afghanistan faces certain economic, political, institutional problems to develop water resources potential. These problems will increase as the years go by. Afghanistan is one of the world’s poorest countries, with an economy largely based on subsistence agriculture. Afghan farmers depend on reliable, year-round sources of surface water and groundwater. Seasonal flows of streams and rivers fed by melting snowpack high in Afghanistan’s mountains recharge alluvial aquifers located in populated valleys and provide city dwellers with drinking water. The current population of Afghanistan is about 31 million and it is projected to increase by nearly 80 percent by the year 2050 to approximately 56 million. This will raise demand on the country’s already economic stressed water resources. Almost all of the river basins are transboundary in the country. The Country due...
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Papers by shirkhan anwari