Aquatic organisms present, not only simple sources of accumulated metal, but can interact with metals, altering their toxicity. Due to exposition of biosphere with metals, organisms have developed various defense mechanisms to protect themselves against adverse effects of these ions and their compounds. Metallothionein (MT) is one of that which represents a critical mechanism for detoxification...

In this paper we first show that standard BP algorithm cannot yeild to a uniform information distribution over the neural network architecture. A measure of sensitivity is defined to evaluate fault tolerance of neural network and then we show that the sensitivity of a link is closely related to the amount of information passes through it. Based on this assumption, we prove that the distribu...

Let R = (ri' r 2 , ... ) be a finite or infinite (strictly increasing) sequence of positive integers and let (Wi' W2 , ••• ) be a sequence of wedges in the complex plane. Consider the following problem: Characterize those complex numbers c for which (Ll) for k = 1,2, .... It is shown in [1 J and [4J that, under certain assumptions on the wedges and on the density of the sequence R, the set of a...

Stenotrophomonas maltophilia is an opportunistic nosocomial pathogen and is being isolated worldwide with increasing frequency. S. maltophilia isolates are often highly resistant to most of the currently used antimicrobial agents, including carbapenems, aminoglycosides, and fluoroquinolones. A variety of antimicrobial resistance mechanisms, including efflux pumps and integrons, have been report...

Sarcocystis is a genus of cyst-forming parasites infecting both animals and human. This study aimed to isolate coccidian tissue cysts from muscle of infected animals by a simple method in addition to molecular identification of Sarcocystis cruzi from the samples. The samples were obtained from commercial source in Babol, Northern Iran. Five grams of calf muscle was cut into 2-3 pieces in 30 ml ...

The increasing global public health concern of antimicrobial resistance (AMR) necessitates exploration of natural antimicrobial agents as potential alternatives. This study aims to investigate antimicrobial activities of Saharan actinomycetes, with specific focus on the strain Streptomyces fimbriatus AC31, that holds promising potential as an alternative to combat AMR. In this context, 32 actin...

  Objective(s): Hypoxia is a serious challenge for treatment of solid tumors. This condition has been manifested to exert significant therapeutic effects on glioblastoma multiform or (WHO) astrocytoma grade IV. Hypoxia contributes numerous changes in cellular mechanisms such as angiogenesis, metastasis and apoptosis evasion. Furthermore, in molecular level, hypoxia can cause induction of DNA br...