21 research outputs found

    An Assessment of the Exporting Literature: Using Theory and Data to Identify Future Research Directions

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    Exporting research is an established facet of the field of international marketing. That stated, the radical increase in recent export activity necessitates a sustained research effort devoted to the topic. In this article, the authors provide a qualitative review of the core theoretical exporting areas and evaluate the exporting domain quantitatively over six decades (1958–2016). For the quantitative analysis, they use multidimensional scaling and apply established bibliometric principles to offer an understanding of the field and to provide suggestions for future exporting research. For the evaluations, the authors used data from 830 articles with 52,191 citations from 35 journals. Using cocitation analysis as the basis to evaluate the data, they propose a series of intellectual structure implications on exporting that relate to internationalization process stages, dynamic capabilities, knowledge scarcity, social networks, export marketing strategy, absorptive capacity and learning, and nonlinear performance relationships involving marketing channel relationships

    On Mahler's pp-adic UmU_m-numbers

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    In this work, it is given a new method for constructing p-adic Um-numbers \xi with upper bounds for w_n^*(\xi), where n=1,...,m-1. 10.1017/S000497271200066

    Analysis of altered mental status in Turkey

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    PubMedID: 18446577The aim of this study was to determine the frequency and etiology of altered mental status in adults at an Emergency Department. Medical records of 790 patients with altered mental status were reviewed. Out of 790 patients, 414 (52.3%) were male, 376 (47.7%) were female. Mean age was 45.65 ± 15.5 years. Etiologic factors were neurological (n = 566; 71.6%), head trauma (n = 82; 10.4%), endocrine/metabolic (n = 48; 6.1%), cardiovascular/pulmonary (n = 49; 6.2%), infectious (n = 30; 3.8%), gynecologic and obstetric (n = 2; 0. 4%), toxicologic (n = 12; 1.5%). Of patients, 40% were in deep coma, 11% were confused, 20% were in agitated confusion, 15% were lethargic, and 14% were in stupor. Eighteen percent of were hypertensive. Total mortality rate was 20.1% (n = 159). Common causes of death were cerebrovascular disease and trauma. Most patients presenting with altered mental status seem to be elderly with the most frequent cause being cerebrovascular accidents. Fatality rate is very high. Copyright © 2008 Informa Healthcare USA, Inc

    The effect of antioxidants (N-acetylcysteine and melatonin) on hypoxia due to carbonmonoxide poisoning

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    PubMedID: 20586144We aimed to determine the effect NAC (N-acetylcysteine) and melatonin on the histopathological and biochemical paramethers in the rats poisoned with CO (Carbon monoxide) experimentally. Winster albino female rats were placed in a plexiglass chamber and they were poisoned with CO. After the poisoning, rats were randomly divided into 3 groups. The group given only normal saline, was used as a control group (n=9). The second group was given 30 mg/kg intraperitonally NAC (n=10). And the third group was treated with 10 mg/kg of melatonin intramuscularly (n=9). It is determined that some biochemical values affected by NAC but not by melatonin. CK, ALT, Lactate, MDA levels were significantly higher in NAC group than control and Melatonin group (p<0.01 for all comparisons). Thiol level was lower in NAC group than control group and Melatonin group (p<0.01 and p<0.001, respectively). There were no statistical significant differences between the melatonin and control group. There were statistically significant difference between control, NAC and Melatonin groups according to brain and lung tissue damage. It is shown that both NAC and Melatonin are reducing the brain and lung tissue damage of CO poisoning but due to biochemical results worsened by NAC, Melatonin may recommend for CO poisoning

    Kafa travmalı olgularda tüm vücut tarama tomografisinin gerekliliğinin değerlendirilmesi [Evaluation of the necessity of whole-body scan tomography in cases with head trauma]

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    PubMedID: 31701501BACKGROUND: In our study, we have tried to find out how necessary whole-body computed tomography (WBCT) is to detect other body injuries that may accompany the patients, evaluating head trauma cases with WBCT. METHODS: In our study, we included 198 patients, who were referred to our hospital's emergency service after head trauma, had brain lesions detected in brain tomography (BT), had no additional examination findings and who underwent WBCT. In this retrospective study, patients' age, gender, type of lesion in brain CT, Glasgow Coma Scale (GCS) values and WBCT findings were examined. RESULTS: In this study, 85.4% of the patients were male and the average age was 25.7 years. The most common cranial CT findings were fracture, followed by parenchymal bleeding. 67% of the patients' GCS were below 8. Additional trauma was detected in 78 of the patients (39.4%). The most common additional lesion was the thoracic contusion. The mean age of the patients with cervical injuries determined in CT was significantly high (p0.05). CONCLUSION: The number of studies evaluating WBCT is high in the literature. However, our study is important concerning that to our knowledge this study is the first study to evaluate the WBCT findings in the head trauma cases without the additional lesions on their bodies. WBCT scan should be recommended in patients whose clinical evaluation could not be completed. WBCT is an important diagnostic tool for the diagnosis of many pathologies, especially for intrathoracic lesions

    Antioxidant enzyme levels in cases with gastrointesinal cancer

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    PubMedID: 19524183The aim is to evaluate the antioxidant enzyme levels in tumoral tissues and accompanying normal tissues in gastrointestinal cancer; and compare the colorectal cancer (CRC) with gastric cancer (GC). Method: Antioxidant enzymes including glutathione reductase (GR), glutathione peroxidase (GPX), superoxide dismutase (SOD), malondialdehyde (MDA) and glucose 6 phosphate dehyrogenase (G6PD) which are important for anti-oxidant functions were evaluated in fresh tumor tissues and adjacent normal tissues obtained from a total of 58 patients. Results: All the enzyme levels were higher in tumoral tissues compared to normal tissue from non-cancerous disease. There was not a significant difference for enzyme levels between CRC and GC groups except GPx. GPx activity tended to be higher in cases without serosal involvement (SI), and this activity was higher in cases without lymph node (LN) involvement in normal tissue (p = 0.012). MDA activity was higher in cases without serosal involvement compared to with SI groups in tumor tissue (p = 0.050). G6PD activity in normal tissue was higher in cases with serosal involvement and LN involvement (p = 0.064, 0.046, respectively). GR activity was higher in signet ring cell cancer (SRC) than adeno cancer. In GC, G6PD activity in tumor was tended to be higher in undifferentiated cancer (p = 0.071). Conclusion: The antioxidant enzymes activities such as GPX, SOD, G6PD, MDA and GR were found to be related with malignant phenotype in gastrointestinal cancers. We need further studies to understand the biologic and clinical importance of these enzymes in GI cancers. © 2009 Elsevier B.V. All rights reserved
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