This paper describes optimization method that combines the Plackett-Burman design, a factorial design and the response surface method, which were used to optimize the medium for the production of L-asparaginase by Serratia marcescens SB08. Four medium factors, from out of 11 medium factors, were screened by Plackett-Burman design experiments and subsequent optimization process to find out the o...

A model of P systems with symport / antiport rules is given in terms of hypernets, a generalization of a class of hierarchical Petri nets introduced for modeling mobility inside the nets-within-nets paradigm. The hierarchical structure of a P system is reflected by the associated hypernet, where molecules are modeled by unstructured agents (simple tokens) and membranes by agents. Each agent is ...

Service-oriented computing provides a suitable technological foundation for developing and executing dynamic business processes. However, most current approaches for composition languages and architectures for dynamic process integration do not provide the flexibility and dynamism required by interorganisational evolving environments. In this work, the DENEB platform for the development and exe...

Nested Petri nets (NP-nets) is an extension of the Petri nets formalism within the nets-within-nets approach, allowing to model systems of interacting dynamic agents in a natural way. One of the main problems in verifying of such systems is the State Explosion Problem. To tackle this problem for highly concurrent systems the unfolding method has proved to be very helpful. In this paper we conti...

The induced gluon radiation of a high energy quark in a finite-size QCD medium is studied. For a sufficiently energetic quark produced inside a medium we find the radiative energy loss ∆Eq ∝ L, where L is the distance passed by quark in the medium. It has a weak dependence on the initial quark energy Eq. The L 2 dependence turns to L as the quark energy decreases. Numerical calculations are per...

background: cancer is the third most common cause of death in iran. colorectal cancer is an ideal tumor for screening. therefore, early diagnosis through screening can reduce its prevalence and mortality. on the other hand, knowledge of practitioners about screening programs has a direct relationship with their performance. methods: in the present cross-sectional-educational study, knowledge, a...

In order to screen the strains with Potassium and phosphorus-releasing bacteria from soil, potassium-dissolving medium was used for preliminary screening, transparent circle method re-screening. The content of soluble potassium determined by sodium tetraphenylborate method, phosphorus anticolorimetric molybdenum antimony. were identified morphological, biochemical molecular biology. results sho...

introducation: cancers are the third most common cause of death in iran. colorectal cancer is an ideal tumor for screening. therefore, early diagnosis through screening can reduce its prevalence and mortality. on the other hand, knowledge of practitioners about screening programs has a direct relationship with their performance. methods: in a cross-sectional-educational study, knowledge, attitu...