فهرست مطالب reza jaafari

Soil organic matter has positive consequences eht rof quality and productivity of soil and also environment, agricultural and biological sustainability and conservation of biodiversity and soil. Organic matter plays an important role in the physical and chemical processes of soil and thus, it is of a great effect on the spectral characteristics of soil. This study was done in order to develop the mapping surface of soil Organic Carbon (OC) of various land uses, particularly rangelands using remote sensing technology in Dehaghan in the south of Isfahan. The data of IRS-P6 and AWIFS satellites with 49 ground control points and accuracy less than 0.3 pixels were recorded. Stratified random sampling method was used. Soil samples were collected from the depth of 0-15 cm at each point. Bulk density of soil samples was determined according to Hunk method and OC% was computed by Walky-Black method. For the preparation of land use map and False Color Composite (FCC), the supervised classification was conducted using maximum likelihood algorithm and Optimized Index Factor (OIF). In order to map the surface soil OC, the multivariate regression model was fitted using band 2 (red band) as the dependent variable. Red band had a relationship with surface soil OC in the study area. Relationship of the red band and surface soil OC content was negative. IRS-P6 and AWIFS satellite images according to the cover of spectral and spatial resolution were considered as a useful method for the preparation of land use map and the map of surface soil OC levels in the study area.

ObjectiveAnti-Rh D IgG is used for the prevention of anti-D antibody production in Rh- individuals who have been exposed to Rh+ red blood cells. The stability of IgG preparations as a solution is low, with a shelf life of a year or more. Formulation of anti-Rh D IgG as a lyophilized preparation would decrease its degradation rate and increases its shelf life. The objective of this study was to formulate the anti-Rh D as a lyophilized preparation using different formulations and optimize the lyophilization processes. Materials and MethodsThe effect of various formulations on the stability of anti-Rh D was evaluated using accelerated stability test. In this method the amount of transmittance (T %) at 585 nm for the lyophilized preparations had inverse relationship with aggregation of anti-Rh D. To improve stability, the most stable formulation was selected and different concentrations of sucrose in the presence of sodium-potassium phosphate buffer 25 mM pH 7.5. Then, the bioactivity was determined, using the ELAT test and also, the amount of moisture measured in this formulation.ResultsAmong different formulations, the one with anti-Rh D 5 mg/ml, tween 80 0.1%, glycine 0.15 M, manitol 7% and sucrose 60 mM in sodium-potassium phosphate buffer 25 mM pH 7.5 was the most stable formulation (P<0.05). The result of biological test of ELAT showed that bioactivity of more than 93% meets the requirement set by British Pharmacopoeia. The amount of moisture measured in this formulation was less than 3%. ConclusionIt was concluded that this formulation could be introduced as a candidate for the formulation of anti-Rh D in a lyophilized dosage form.