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Introduction: Nanotecnology could solve most of problem of biomedical and cause improve in health and pharmacology field. Also this industrial cause to eliminate food pathogenic bacteria.increase of food pathogenic bacteria and resistance them to different antibiotics caused usage of nanotechnology by researchr and pharmacologiests. Material and Methods:In this reseach is studied antimicrobial effect of nanoparticles of silver,TiO2 against on food pathogenic bacteria such as Staphylococcus aureus PTCC 1431 and Listeria monocytogenes by determination MIC and MBC. Result: Silver nanoparticle was synthezied with 103 nm of size and consentraion of 1 mili molar,nano TiO2 with 21 nm of size and consentrain of 1% have antimicrobial effect against on Staphylococcus aureus PTCC 1431 Listeria monocytogenes . Conclusion: Since that antimicrobial activity of silver ,TiO2 nanoprticles against on food pathogenic bacteria (Staphylococcus aureus PTCC 1431 and Listeria monocytogenes) is proved, is suggested to packaging antimicrobial food. Keywords: Silver nanoparticle,TiO2,,Antimicrobial effect, Staphylococcus aureus PTCC 1431 Listeria monocytogenes

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Rapid technological changes, intense competition of enterprises, and globalization have transformed the phenomenon of financial distress and corporate bankruptcy into a major issue in financial and investment literature. Bankruptcy attracted the attention of financial sector activists, including investors, lenders, suppliers, business partners, and governments. Considering the role of intellectual capital in organizations, one can expect that companies with a richer intellectual capital are more intelligent in avoiding bankruptcy. The purpose of this research is to investigate the role of intellectual capital and its components (including human capital, structural capital, and customer capital) on firms’ probability of bankruptcy in Tehran Stock Exchange. For this purpose, the data of 147 firms from Tehran Stock Exchange that are selected by systematic elimination method were studied during time period of 1387 to 1393. In order to measure the intellectual capital, the PULIC model applied and to assess the probability of bankruptcy, conversion of Zscore results (from Altman Model) to the probability used. Also, to test hypotheses, multivariate regression models with hybrid data have been used. The results of the hypothesis test show that intellectual capital and its components have reverse (negative) and significant effects on the firms’ probability of bankruptcy in Tehran Stock Exchange.

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One of the main issues in financial management is choosing the best way of utilizing investment. Investors would like to invest their capitals in a way to minimize their risks. Bankruptcy is one of the risk factors which affect the decision of investors. Prediction of bankruptcy can help investors to reduce the risks in the capital markets and recognize the best opportunities for alternative investment. This study aims to predict the bankruptcy of companies by using the technique of Artificial Neural Network (ANN). Moreover, discriminant Analysis and logestic regression techniques are employed to compare the results. The data used in this study covers the firms in the Kerman Province of Iran over the period 1975- 2007. The results show that ANN model perfom much better than the discriminant analysis and logestic regression techniques. Moreover, the results confirm that the accuracy of ANN model is higher than the discriminant analysis and logestic regression techniques for predicting of bankruptcy. The analysis also shows that none of the firms will bankrupt in the year after the period covered in this study.

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Abstract Concerning the multinational companies activities in different countries, the main problem about their bankruptcy is the conflict of laws in countries that companies are domiciled in them or they have properties. As necessity of inspection of company bankruptcy claim is the determination of competence out, thus, it is supposed to set up county or competence conflicts before solving the conflict of laws within the legal framework. Therefore, the unity (or universality) and plurality (or territoriality) theories and reasons of experts on this issue were analyzed, then efforts have been done for applying the unity or universality of bankruptcy were investigated. At the end, the legal competence of Iranian court for inspection of companies bankruptcy claims and issues of executive judgment were discussed. The obtained results, however, showed that since the nature of bankruptcy necessitates the same judgment of the conflict of domestic laws of countries with unity and universality of bankruptcy, the way of solution must be searched in the conventional laws. Nevertheless, the bilateral or multilateral conventions are not enough for this purpose, there fore, it is necessary to regulate a universal convention by encouraging of more countries to join this convention.

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The current Iran's commercial code has been derived from France's commercial code enacted in 1807. Iran’s commercial cod in the realm of bankruptcy regulations had no amendments since 1930, while the French one was abrogated totally and changed. Due to the increasing promotion of trade activities, we see that so many new legal institutes were created in the developed countries. For instance, we can refer to the institute of reorganization in the scope of bankruptcy. This institute, which needs to a plan of reorganization, organizes the relationship between creditors and debtors. The institute to create reorganization needs to acceptance of the majority of creditors and approval of the court. When the court approves the plan, the debtor as a “possessor debtor” continues his trade activities and has control on his assets and properties. Indeed, the institute of reorganization is a bilateral legal relationship. Hence, its nature is compatible with the notion of contract. Thus we can describe it as an enforceable, promissory, nominate, independent and gratuitous contract. There are differences between this institute and leniency contract. For example, in the latter, the court intervene, only in the stage of making and approval of the contract, while in the former, the court intervenes in these two stages and the stage of administration on the institutes. So the creditors have a better means to control the debtors in all stages and prevent them from misuse in the process of reorganization. In this article, we try to analyze the institute of reorganization with a comparative view with leniency contract in American and Iranian legal systems.

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Abstract Various methods have been proposed to produce metallic and bulk form materials.Severe plastic deformation, the ways in which you can set quite a lot of mechanical work applied to the metal. Various methods have been proposed to produce metallic and bulk form materials. However, despite the widespread need for tubes with high strength to weight ratio, few studies and attempts have been done to produce ultra-fine and nano structures.Ultra-fine grain metal created by the process have a high resistance by itself. therefore, these can be as high strength steels are used in harmony with the environment. In this study, optimal design of a cast is done in order to increase the homogeneity of the material microstructure and reduce applied force of the pipe production process.Finite element software is used to design the desired format. Since the framework has been designed based on the pressure in angular channels with parallel tube, the channels angles, corners and curved angles, reshaping and the channel radius ratio, the coefficient of friction between the pipe and the channel and the number of passes are the parameters affecting the process.The effect of the above parameters in a homogeneous effective strain rate and force of the process has been studied.

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       According to the Section 422 of Commercial Code, the debt of merchant accelerates by the issue of bankruptcy verdict. In addition, the legislator, in Section 422 of Commercial Code, extends the acceleration of debt to other liable persons of the commercial document. According to the Section 422 of Commercial Code, they should give securance or pay the commercial document, if the maker of promissory note, the drawer of draft who has not been accepted by the drawee, and the acceptor go bankrupt. The purpose of this section is the security of the commercial document. This section is in conflict of commercial document and bankruptcy provisions. That is in contrast of the principle because it increases the obligation of commercial document liable, because liability of commercial document liable is payment of the commercial document in due date.     Section 422: a) The effect bankruptcy of principal liable is not acceleration the debt of guarantor; b) Bankruptcy of endorser does not accelerate the debt of another commercial document liable, and c) This article does not include check because this article is exceptional.    Although acceleration of the debt of the commercial document liable persons in the effect of bankruptcy has not been discussed in the American Law, but the final liable is the endorser who receives negotiable instrument from the bankrupt, if the primary liable files for petition.     
  

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      The legislator of the Islamic republic of Iran predicts bankruptcy of several liable in Article 251 of Commercial Law. According to this article, several questions are left unanswered: Whether the legislator protects from the holder in condition that several liable were bankrupt or not? Whether the holder has priority or not? What is the position of the United State’s law in the presumption that several liable were bankrupt? The just protection from the holder in Iranian law is joint and several liability of the liable. In Iranian law, the holder has not priority. In the United State’s law, liability of the liable is not joint and several, and also the holder has not priority. The legislator does not accept the theory of provision in the Iranian and the United State’s law.            
*corresponding Author’s E-mail : Shahbazinia@modares.ac.ir

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In this study, the effect of Parallel tubular channel angular pressing (PTCAP) as a severe plastic deformation (SPD) process on the microstructural, mechanical properties and superplasticity of AZ31 magnesium alloy were investigated. PTCAP method at 300°C was performed for production of ultra-fine grained (UFG) tube with a high superplasticity. After the first pass of PTCAP a bimodal microstructure, large gains surrounded by a large number of tiny recrystallized ones, was observed. The grain refinement and homogeneity of the microstructure increased by applying subsequent passes of PTCAP. After four pass of PTCAP, the average grain size of the material decreased from 43 µm to 6.8 µm. Vickers microhardness measurements revealed that by applying more PTCAP passes and consequently, more grain refinement, the value of hardness increased. Fractographic SEM images showed that predominately ductile fracture was occurred in all hot tensile specimens. A higher elongation to failure of 256% was achieved at a higher tensile testing temperature of 450°C and a strain rate of 10-3 1/s, due to grain boundary sliding as a dominant deformation mechanism, while this values for the as-received sample is 116% at the same tensile testing condition. Finally, it was observed that the four-pass PTCAP processed sample has higher room temperature microstructural and mechanical properties and also higher elevated temperature superplasticity than the as-received sample. Also, the grains thermal stability test was done on the four-pass PTCAP processed sample at 5 different temperatures.

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The main goal of this study is achieving thin-walled AZ31 magnesium alloy tubes with high ductility at elevated temperature. For this purpose, a combined severe plastic deformation method, including parallel tubular channel angular pressing (PTCAP) and tube backward extrusion (TBE) was used. First, PTCAP process was applied on tubular samples at 300°C and then, TBE process was performed at 300°C. After PTCAP, a necklace like microstructure, large gains surrounded by a large number of tiny recrystallized ones, was observed and the average grain size of the material decreased from 520 µm to 11.1 µm. At the next stage, After TBE, an ultra-fine grain microstructure with an average grain size of 8.6 µm was formed. After performing this combined method, the hardness value of the PTCAP and TBE processed sample increased from 37 HV to 69 HV. Hot tensile testing studies at 300°C revealed an elongation to failure value of 181% for the PTCAP and TBE processed sample, while this value for as-received sample was 55%. Fractographic SEM images showed that predominately ductile fracture was occurred in all hot tensile specimens due to nucleation of microvoids and their subsequent growth and coalescence with each other.

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The main goal of this study is achieving thin-walled AZ31 magnesium alloy tubes with high ductility at elevated temperature. For this purpose, a combined severe plastic deformation method, including parallel tubular channel angular pressing (PTCAP) and tube backward extrusion (TBE) was used. First, PTCAP process was applied on tubular samples at 300°C and then, TBE process was performed at 300°C. After PTCAP, a necklace like microstructure, large gains surrounded by a large number of tiny recrystallized ones, was observed and the average grain size of the material decreased from 520 µm to 11.1 µm. At the next stage, After TBE, an ultra-fine grain microstructure with an average grain size of 8.6 µm was formed. After performing this combined method, the hardness value of the PTCAP and TBE processed sample increased from 37 HV to 69 HV. Hot tensile testing studies at 300°C revealed an elongation to failure value of 181% for the PTCAP and TBE processed sample, while this value for as-received sample was 55%. Fractographic SEM images showed that predominately ductile fracture was occurred in all hot tensile specimens due to nucleation of microvoids and their subsequent growth and coalescence with each other.

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Encapsulation is an effective method to increase the viability of probiotic bacteria. The aim of this research is to determine the optimal formulation for microencapsulation of Lactobacillus acidophilus PTCC 1643 with soy protein isolate, xanthan gum and fructooligosaccharide as wall materials by freeze drying method. For this purpose, 19 treatments with Combine design were prepared by Design expert software. Encapsulation efficiency, particle size, zeta potential, and probiotic viability, FTIR and SEM tests were performed on the samples. The optimal sample was selected based on the lowest zeta potential and particle size, and the characteristics of microcapsules were determined by the aforementioned tests. The results showed that probiotic viability increased and decreased with increasing concentration of soy protein isolate and xanthan gum, respectively. The particle size of the samples also increased with increasing the concentration of soy protein isolate. In general, according to the protective effect of xanthan gum, soy protein isolate and fructooligosaccharide on probiotics, it can be concluded that these compounds can be used as a wall for coating to enrich food products.

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Due to the importance of the Corporate bankruptcy is more importance issue in subject of bankruptcy; because several groups engage in this financial crisis. The purpose of the bankruptcy legislators is to decrease negative influences of that crisis. The economic approaches in bankruptcy proceeding is maximize the value of corporate bankruptcy estate. One of the best approaches in this case is theory of “deepening insolvency”. This theory has been described as an injury to the debtors’ corporate property from the fraudulent expansion of corporate debt and prolongation of corporate life. Some courts permitted deepening insolvency to be asserted as a theory of damages and some courts held that this theory would be recognized as a cause of action and other courts rejected that.
The legal entity of “delaying bankruptcy” is most similar to the theory of “deepening insolvency” in Iranian law. Iranian legislator not paying attention to the tort in the legal entity of “delaying bankruptcy”. Nevertheless, can be accepted that damage caused from deepening insolvency be compensated in general civil liability rules.
 

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In article 496 of the Procedural Civil Code of procedure in Public and Revolutionary (Enghelab) Courts in civil cases, Iranian’s legislator, has prohibited referring bankruptcy dispute to arbitration. In American law system, such a prohibition has been provisioned with the recognition of the exclusive jurisdiction for special courts to settle the bankruptcy disputes itself in 28 U.S. § 157 –Procedures.
Since the economic crisis in recent years has followed (caused) increasing of bankruptcy in both individuals and trading companies, such a prohibition expels a large number of commercial disputes from the sphere of arbitrable issues. Deprivation of the many benefits of arbitration is justified only if the study of such a prohibition reasons justifies the exclusive proceeding in national courts.
There are ambiguities regarding the domain of this prohibition in both countries. Recognizing the scope of non-arbitrable disputes is depend on the understanding of this prohibition causes. Research results show that the difference between bankruptcy and arbitration codes, in both countries, is the most important reason for such prohibition and this difference is such an important that prevents reconciliation between bankruptcy and arbitration.
In Iranian law system, the mentioned prohibition includes the bankruptcy itself and its basic related issues. In American law system, only the basic issues of bankruptcy are not referable to arbitration. So, non-basic issues are included in the arbitrability principle.
 

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Due to the particular role they play in macroeconomics and the fact that they offer a unique set of services to the general public, banks have attracted attention of legislators. Considering the bank's bankruptcy and its very negative effects, especially since the great economic crisis that began in 1929 in the United States and then spread to the whole world, began and the legislators concluded that the general rules of bankruptcy of companies to handling insolvency of banks is not enough. Therefore, in most legal systems of the world, when a business company is bankrupt, it is governed by general bankruptcy rules. But if a bank goes bankrupt, it has tried to consider specific rules for their bankruptcy considering the specific nature of banks in the country's economy and the differences with other commercial companies. The United States is one of the systems in which bankruptcy regulations of banks are completely different from corporate bankruptcy regulations. In Iranian law, though,unlike the US the bankruptcy system of banks is not completely separate from the bankruptcy system of the companies, and if the bank goes bankrupt, the rules of the bankruptcy act are considered to be general regulations and other monetary and banking regulations are specific rules, and the result is that, in the absence of specific provisions, apply the bankruptcy rules of commercial act are implemented.
 

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The financial crisis has always been a threat to businesses because of the political and economic problems, and the legislator has taken action to prevent this occurrence because the financial crisis of the firm deprives society of its benefits. In the event of a financial crisis and the governing of bankruptcy rule, the question is that what extent can these legal rules prevent the business from collapsing?
In response to this question, US and Iranian law were studied. In the United States as a country with a capitalist economic system, the legislature's primary goal is to support bankrupt and fresh start of the business. This goal has been considered in the reorganization and liquidation. To achieve this goal, it has been attempted not to shut down businesses enterprise prior to the reorganization and liquidation. In Iranian law, after the bankruptcy of an enterprise, the possibility of fresh start is very weak.

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Proper functioning of payment systems mainly requires a legislative support by establishment a strong and cohesive legal framework. One of the important factors in the efficiency of these systems is the management of legal risks, i.e. losses due to unexpected or uncertain implementation of a law. Presence of foreign elements in international payment systems makes laws, governing these systems, conflict more likely and through those laws the conflict between bankruptcies laws, in cases which one of the parties gets bankrupt, is inevitable.
Analytically-Descriptive in manner and by comparative studies the present research discusses various approaches of different legal systems in resolving conflicts between bankruptcy laws and jurisdictional competences and also considers the impact of these laws on proper functioning of payment systems, especially those effects related to the principle of performed payment order’s irrevocability and the settlement finality principle.
According to the results of this study, preference of the law governing the payment and settlement system to the law governing bankruptcy affairs, establishing substantive regulations in support of payment systems in a manner that the validity of performed payment orders and settlements, which had been taken place before the commencement of bankruptcy processes, and also the validity of payment orders, which are taken place without awareness of bankruptcy sentence and after bankruptcy process commencement, would be maintained by elimination of provisions regarding the retroactivity of bankruptcy sentences and also elimination of any zero hour rule regarding payment systems, are crucial for avoiding adverse effects of bankruptcy laws conflicts on payment.systems.proper.functioning.as.well.as.to.reduce.legal.risks.of.such.systems.