In the recent past, various algorithms for image encryption is introduced based on chaotic systems. Some of them appeared weak in some points, such as resisting some attacks with low sensitivity to change of plain-images. In this article, a new two-dimensional (2D) hyperchaotic system is proposed, which is derived from three maps, namely, Henon, logistic, iterative chaotic map with infinite collapse (ICMIC) maps. This system shows high sensitivity to the initial condition, complicated dynamics, and hyperchaotic properties. However, it is adopted in the design of a new image encryption algorithm. The encryption process is mainly depending on changing of eigenvalues and eigenvectors of the original image utilizing a function to change the intensity of pixels. The plain-image is divided into blocks to generate four different keys (multi-key) based on the proposed hyperchaotic system, which helps to increase the complexity and reduce the computation time. Eventually, to show the efficiency of the encryption image, some analysis tests are performed, such as; NPCR, UACI, image histogram, pixels correlation, and Shannon entropy.

The current study was carried out to investigate the toxic effects of aflatoxin B1 exposure on heart, lung, and testis of male Albino rats. Twelve healthy male Albino rats were used in the current study. They were divided equally into 2 groups (control and treated groups). The treated group was given aflatoxin B1 orally by a gastric tube at concentration 0.5 mg per kg of body weight for 7 day. The control group was given distilled water alone. At the end of experiment (1 week), the rats were killed under ether anesthesia and the internal organs(heart, lung, and testis) were collected immediately for histological examination. The histopathology examination in heart revealed that there is oedema between myocardial. In lung, there is a large number of inflammatory cells and dilated the alveolar sac with exudates. The testis revealed the excessive vacuolated cells and suppression spermatogenesis. In conclusion, oral dose of aflatoxin B1 exposure could induce a deleterious effect on the histological structure of the heart, lung, and testis of male Albino rats. High level of attention must be taken to prevent the possible contamination of our food with aflatoxin B1.

The energy of a graph is used to approximate the total π-electron energy of molecules. Thus, finding a new technique that facilitates this task is a challenge that has received increased research attention. This paper introduces the eigenvalues of a complete tripartite graph T_i,i,n-2i, for n ≥ 4, with respect to the adjacency, Laplacian, and signless Laplacian matrices. The chemical HMO approach is particularly successful in the case of the total π-electron energy. Experiments reveal that some chemical components are equienergetic with the tripartite graph. This finding helps easily derive the HMO of most of these components despite their different structures.

Every day the number of attacks increases to break the encryption algorithms. Therefore, it is considered necessary for designing a new algorithm with higher security. Any cryptographic system must have some fundamental features to resist any effective attack, preserve the transmitted information, and robust the statistical characteristics. This article aims to improve the RSA algorithm using a three-dimensional chaotic dynamic system with sophisticated attributes, which proposed for this purpose. It is derived from Memristive's and Sprott's chaotic systems. We call it a 3D-hyperchaotic Memristive Sprott system (3D-HMSS). This new system is adopted in generating keys for the RSA encryption algorithm. Some tests are used to show the efficiency of the proposed cryptosystem.

Chocolate intoxication can be life-threatening to dogs and cats with high morbidity and mortality. The current study aims to compare the toxic effect of dark chocolate on domestic dogs versus street dogs. Eighteen male dogs were used in this study, nine of each of domestic dogs and street dogs. The experiment continued for seven consecutive days. After three days, blood samples were collected as a control, and one dog from each group was sacrificed for negative control histopathological purposes. The same animals of both groups received a mixture of the standard diets and cocoa powder (1g / Kg BW / day) for four days. Clinical signs appeared faster in domestic dogs than in street dogs. Liver enzymes and oxidative stress indicators were elevated after four days in both street dogs the domestic dogs but not in their control groups. Furthermore, there was a significant increase in lipid profile except for HDL in the groups treated with cocoa compared to the control groups. The same results were noticed regarding total protein, urea, and creatinine since they significantly increased against their controls. In conclusion, cocoa is toxic to both domestic and street dogs in the same way except for the starting of the clinical signs where the domestic dogs were affected earlier than street dogs.