Mohammad Naghavi - Academia.edu (original) (raw)

Papers by Mohammad Naghavi

Iranian Journal of …, 2004

Two different DNA-based techniques viz, randomly amplified polymorphic DNA (RAPD) and simple sequ... more Two different DNA-based techniques viz, randomly amplified polymorphic DNA (RAPD) and simple sequence repeat (SSR) markers were used to estimate genetic diversity among bread wheat. A total of 188 clear and repeatable bands were amplified from 17 selected RAPD primers, and 101 fragments were detected from 35 SSR primer pairs. The level of polymorphism was 88% with RAPDs compared to 100% with SSRs. Mean genetic similarity was estimated to be 0.88 based on RAPDs and 0.85 using SSRs. The wide range of genetic similarity was obtained by SSR than RAPD, reflecting the hypervariability of SSR markers and their high resolution power. Matrix correlation analyses suggested that a good representation of the relationships among the bread wheat cultivars/lines can be obtained by using RAPDs alone or in combination with SSRs, but SSRs alone cannot be used for this purpose. Both techniques discriminated the genotypes very effectively. On the hand, RAPDs were able to discriminate the cultivars Alvand and Ghods, whereas the cultivars Sardari and Ghods were discriminated only by SSRs. The use of PCRbased assays having advantage of being quick, easy to use and refractory to many environmental influences can complement traditional methods of germplasm characterization.

The present study is an attempt to provide a current synopsis of World Englishes within globalize... more The present study is an attempt to provide a current synopsis of World Englishes within globalized communities, as well as theoretical and applied feasibility of global linguistic features of English as an International Language (EIL). To do so, first, three main reactions against the spread of English by scholars around the world are discussed. Then, the possibility of describing and teaching such globalized varieties will be evaluated. Finally, current challenges ahead of the researchers in the field will be presented.

Procedia - Social and Behavioral Sciences, 2014

The purpose of the present article is to make a contrastive cross-cultural pragmatic analysis bet... more The purpose of the present article is to make a contrastive cross-cultural pragmatic analysis between Canadian native speakers, Iranian EFL learners, and Iranian native speakers of Persian in regard to the speech act of complaint. To do so, in the first stage, a Nelson Proficiency Test was administered among 20 Canadian university students majoring in different fields,20 among Iranian EFL learners, and 20 among Persian speakers, respectively. Based on the results of this test, those who scored highly on the test were selected as the main participants of the study. In the second stage, an open-ended questionnaire in the form of a Discourse Completion Task (DCT) comprising of 30 authentic complaint situations was administered among the three groups. It should be noted that the DCTs were translated into Persian for the third group of participants. The data was analyzed using a nonparametric statistical hypothesis test called Kruskal-Wallis Test for assessing whether or not one of the three samples of independent observation tends to have larger values than the other and Mann-Whitney U Test to investigate which strategies in which groups are distinct and the findings revealed that all respondents showed significantly different behaviors to express complaints in the different situations. Moreover, sex and social power were found to cause differential use of complaint utterances.

Iranian Journal of …, 2004

Two different DNA-based techniques viz, randomly amplified polymorphic DNA (RAPD) and simple sequ... more Two different DNA-based techniques viz, randomly amplified polymorphic DNA (RAPD) and simple sequence repeat (SSR) markers were used to estimate genetic diversity among bread wheat. A total of 188 clear and repeatable bands were amplified from 17 selected RAPD primers, and 101 fragments were detected from 35 SSR primer pairs. The level of polymorphism was 88% with RAPDs compared to 100% with SSRs. Mean genetic similarity was estimated to be 0.88 based on RAPDs and 0.85 using SSRs. The wide range of genetic similarity was obtained by SSR than RAPD, reflecting the hypervariability of SSR markers and their high resolution power. Matrix correlation analyses suggested that a good representation of the relationships among the bread wheat cultivars/lines can be obtained by using RAPDs alone or in combination with SSRs, but SSRs alone cannot be used for this purpose. Both techniques discriminated the genotypes very effectively. On the hand, RAPDs were able to discriminate the cultivars Alvand and Ghods, whereas the cultivars Sardari and Ghods were discriminated only by SSRs. The use of PCRbased assays having advantage of being quick, easy to use and refractory to many environmental influences can complement traditional methods of germplasm characterization.

The present study is an attempt to provide a current synopsis of World Englishes within globalize... more The present study is an attempt to provide a current synopsis of World Englishes within globalized communities, as well as theoretical and applied feasibility of global linguistic features of English as an International Language (EIL). To do so, first, three main reactions against the spread of English by scholars around the world are discussed. Then, the possibility of describing and teaching such globalized varieties will be evaluated. Finally, current challenges ahead of the researchers in the field will be presented.

Procedia - Social and Behavioral Sciences, 2014

The purpose of the present article is to make a contrastive cross-cultural pragmatic analysis bet... more The purpose of the present article is to make a contrastive cross-cultural pragmatic analysis between Canadian native speakers, Iranian EFL learners, and Iranian native speakers of Persian in regard to the speech act of complaint. To do so, in the first stage, a Nelson Proficiency Test was administered among 20 Canadian university students majoring in different fields,20 among Iranian EFL learners, and 20 among Persian speakers, respectively. Based on the results of this test, those who scored highly on the test were selected as the main participants of the study. In the second stage, an open-ended questionnaire in the form of a Discourse Completion Task (DCT) comprising of 30 authentic complaint situations was administered among the three groups. It should be noted that the DCTs were translated into Persian for the third group of participants. The data was analyzed using a nonparametric statistical hypothesis test called Kruskal-Wallis Test for assessing whether or not one of the three samples of independent observation tends to have larger values than the other and Mann-Whitney U Test to investigate which strategies in which groups are distinct and the findings revealed that all respondents showed significantly different behaviors to express complaints in the different situations. Moreover, sex and social power were found to cause differential use of complaint utterances.