Sharif Digital Repository

Honey as a food product with plant origin that nearly ninety percent of its dry weight is composed of sugars (mostly fructose and glucose) which has many food and pharmaceutical properties. So honey quality strongly depends on bees feeding practices. For this reason common indexes is defined generally are on the basis of hony composition, for example fructose and reducing sugar portion must be at least thirty and sixty-five percent respectively of total weight or sucrose percent must be utmost five and otherwise puts into question honey quality. To check the quality of five honey samples taken from the market, indexes such as water content, sugar composition(fructose, reducing and total... 

Honey Encryption (HE) has been introduced to provide resilience for cryptographic algorithms with low min-entropy keys, against brute-force attacks. Using spurious keys, we have designed an encryption framework consisting of a Distribution Transforming Encoder (DTE), which uses a Password Based Encryption (PBE) algorithm in CTR mode of operation. The proposed DTE block benefits from an efficient error-correcting code, acting as a many-to-one mapping scheme. The proposed framework gets some spurious key-plausible looking plaintext tuples as input and outputs a ciphertext. The structure of the proposed scheme is designed to increase the uncertainty of attacker about the correct plaintext, even... 

In this work, a biocompatible sorbent based on halloysite nanotubes-zein bionanocomposite for direct-immersion thin film microextraction (DI-TFME) is introduced. Zein as a biodegradable, low cost and accessible polymer was used to prepare a flexible thin film with the possession of different interactions and good adsorption capacity. To improve the mechanical and chemical resistance of the film, halloysite nanotubes were combined with zein to prepare the thin film sorbent. The film was used for TFME of 16 pesticides from different chemical classes, including organochlorines and organophosphates followed by gas chromatography with electron capture detector (GC-ECD). To achieve the maximum...