Sharif Digital Repository

In this project a new molybdenum (VI) complex with tetradentate Schiff base ligand which was soluble in water was synthesized and characterized. In the first step of ligand synthesis, the reaction was performed between salicylaldehyde and aniline, and then used concentrated sulfuric acid for sulfonation. In the next step 5- sulfosalicylaldehyde sodium salt was formed by removing of aniline with heating and using sodium carbonate. In the presence of ethylendiamine and bis (acetylacetonato) dioxomolybdenum(VI) the final product, cis-dioxo sodium (N,N-bis (5-sulfonatosalicyldene)1,2-diaminoethane) molybdenum (VI) complex was synthesized. The complex was characterized by (CHN) elemental... 

Conjugated linoleic acid (CLA) is a collective term used to describe the mixture of geometric isomers of linoleic acid which has several beneficial biological effects. Considering the use of CLA for medicinal of nutraceutical purposes, an isomer-selective and safe process is required. The introduction of biological reactions to CLA production will solve this problems. Nowadays, CLA is produced through chemical isomerization of linoleic acid which results in by-production of unexpected isomers. From this point of view biotechnology methods and producing microorganisms implementation have gained lots of attention because of not producing unwanted bypass products and also being natural method.... 

Image segmentation has a huge amount of applications in machine vision, target detection, medical image processing, etc. In many medical researches such as Organ and Gland Volume Specification, Analysis of Anatomical Structures and Multimodal Image Registration, Organ
Segmentation is the first step of preprocessing.Since detection of diseases out of medical images depends on organ segmentation results,the segmentation process is done by experts which has a lot of disadvantages such as high time computation, high cost, etc. Hence, designing algorithms that can segment images with high accuracy and need minimum user interaction are desirable. So, in this thesis, a new
knowledge based... 

One of the most critical problems in medical supply chain is tracking the pharmaceutical throughout the chain. The challenging solution is to use of barcodes which has numerous limits. Radio frequency identification (RFID) tools are the next generation of barcodes that provide more convenient and faster track of supplies. With automatic workplace, the precision of the system is increased and less personnel is needed. In this study, various medical supply chain management procedures were studied for a hospital and the most appropriate procedure was chosen. According to the hospital conditions, RFID over barcode was the procedure of choice. In order to validate this choice, the ARENA software... 

In the proccess of making key slots in lock parts, broaching is necessary. The only procedure or at least the best procedure for making the slots is broaching. High speed and precision, surface quality and the ability to create complicated surfaces in one step are the advantages that make broaching suitable for this product. The cost of tool maintainance and replacement is very important to make this process efficient economically, therefore, determining the factors affecting tool life are important for industries. The purpose of this study is to increase the life of narrow broaching tools. In other words, in this study, the purpose is to design and manufacture the tool in such a way that... 

Polychlorinated Biphenyls are a class of organic compounds that are composed of two biphenyl rings attached by 1-10 chlorine atoms. Due to their specific properties, such as physical and chemical stability, flame resistance, and dielectric properties, these compounds are used as dielectric liquids, heat-exchange fluids, hydraulic liquids, plastifiers, and especially as Askarel oil in power plant transformer. Because of their high persistency in the environment, high toxicity, and bioaccumulation in the adipose tissue of humans and animals, their production is banned in most countries, and their use has been limited. There are different methods for detoxification of these compounds, and in...