68 research outputs found

    How banking sanctions influence on performance of foreign currency portfolio management

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    A good portfolio optimization on banks’ currency holdings not only helps meet their needs but also it increases banks’ total assets. During the past few months, US sanctions against Iran has influenced profitability banking currency portfolio holding. The proposed model of this paper considers the weekly information of two years before and after sanctions occurred in Iranian banking system. Therefore, the study uses 210 weekly data and proposes a method to analyze the data to measure the performance of banking currency portfolio after sanction happens. The proposed model of this paper provides lost profit and unrealized loss and using the idea of Technique for Order of Preference by Similarity to Ideal Solution (TOPSIS) we rank the resulted data. Next, we use some parametric and non-parametric methods to see whether there is any change as a result of sanction on the performance of the portfolio. The results indicate that not only the performance of the portfolio was reduced but also the variance of the return after sanction has been increased

    How customer satisfaction changes behavior: A case study of banking industry

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    An increase on competition industry from one side and the need for customer retention on the other side in banking industry create necessary motivation to learn more about customer behavior. This paper investigated the relationship between seven perspectives of banking services and customers’ attitude towards changing behavior. The seven perspectives included how bank employees’ treat customers, service prices, how to promote and market synergies, place and time to serve customers, products, equipment and process. The proposed study was implemented in two Iranian banks called Mellat and Tejarat in city of Tehran, Iran. The results indicated that all components except one case, which was “how to promote and market synergies” had meaningful and negative relationship with customer behavior

    Mathematical Modeling and Review of Pine Wilt Disease

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    Pine Wilt Disease (PWD), caused by the pinewood nematode (PWN) Bursaphelenchus xylophilus, causes significant losses in coniferous forests in eastern Asia, including Japan, China, and South Korea, as well as western Europe, including Portugal. The results of the research papers given at the International Symposium on Pine Wilt Disease (IUFRO Working Party Meeting 4.04.03) in Nanjing, China, in July 2009 are summarized in this article. The basic themes discussed included pine wilt disease (PWD), the pinewood nematode (PWN) Bursaphelenchus xylophilus, and other PWN-associated microorganisms that play a significant role in PWD, such as bacteria (e.g., Pseudomonas fluorescens). The majority of the papers are based on PWD-PWN research in East Asia and Russia. The following are some of the specific topics covered: 1) fundamental concepts of PWD development, 2) pathogenicity, 3) host-parasite relationships, including histopathology of diseased conifers and the role of toxins from bacteria-nematode ecto-symbionts, 4) PWN life cycle and transmission, 5) B. xylophilus dissemination models, 6) associations (with other nematodes), 7) diagnostics, 8) quarantine and control of the PWN and 9) biocontrol of the PWN

    Comparison of seropositivity of HCV between oral lichen planus and healthy control group in Hamedan province (west of Iran)

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    Background: Lichen planus is an idiopathic inflammatory disease of the skin, nail, hair and mucous membranes. Oral lichen planus (LP) is a chronic inflammatory condition that affects the oral mucous membranes with a variety of clinical presentations. Various etiologies include HCV suggested for LP, and the aim of this study was comparison of seropositivity of HCV in LP patients and control group. Methods: All oral LP patients that were referred to dermatology clinic of farshchian hospitalwere entered in the study. Five cc of clot blood was taken from each patient and tested for anti-HCVand when anti-HCV tested positive another 2cc clot bloodwas taken for HCV-Rt-PCR test. The results were analyzed with SPSS 16. Results: This prospective cross-sectional study was conducted on 30 oral lichen planus patients [males 13(43.3%) females 17(56.7%)] with mean ages of 46±13.7years and 60 healthy individual [males 26(43.3%) females 34(56.7%)]. There was no oral lichen planus patients who had anti-HCV positive whiles 2 males(3.3%) of healthy group had anti-HCV positive which was confirmed by HCV-Rt-PCR. Conclusions: This study showed that there is no correlation between seropositivity of HCV and oral lichen planus in our patients in the west of Iran

    Contribution of BRCA1 germline mutation in patients with sporadic breast cancer

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    Hereditary artifacts in BRCA1 gene have a significant contributory role in familial cases of breast cancer. However, its germline mutational penetrance in sporadic breast cancer cases with respect to Pakistani population has not yet been very well defined. This study was designed to assess the contributory role of germline mutations of this gene in sporadic cases of breast cancer. 150 cases of unilateral breast cancer patients, with no prior family history of breast cancer and no other disorders or diseases in general with age range 35–75 yrs, were included in this study

    Discrepancy between PCR based SARS-CoV-2 tests suggests the need to re-evaluate diagnostic assays

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    Objective: We investigated the discrepancy between clinical and PCR-based diagnosis of COVID-19. We compared results of ten patients with mild to severe COVID-19. Respiratory samples from all cases were tested on the Roche SARS-CoV-2 (Cobas) assay, Filmarray RP2.1 (bioMereiux) and TaqPath™ COVID19 (Thermofisher) PCR assays.Results: Laboratory records of ten patients with mild to severe COVID-19 were examined. Initially, respiratory samples from the patients were tested as negative on the SARS-CoV-2 Roche® assay. Further investigation using the BIOFIRE® Filmarray RP2.1 assay identified SARS-CoV-2 as the pathogen in all ten cases. To investigate possible discrepancies between PCR assays, additional testing was conducted using the TaqPath™ COVID19 PCR. Eight of ten samples were positive for SARS-CoV-2 on the TaqPath assay. Further, Spike gene target failures (SGTF) were identified in three of these eight cases. Discrepancy between the three PCR assays could be due to variation in PCR efficiencies of the amplification reactions or, variation at primer binding sites. Strains with SGTF indicate the presence of new SARS-CoV-2 variant strains. Regular modification of gene targets in diagnostic assays may be necessary to maintain robustness and accuracy of SARS-CoV-2 diagnostic assays to avoid reduced case detection, under-surveillance, and missed opportunities for control

    Twin pregnant woman with COVID-19: a case report

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    A Case of pregnant woman (G2Ab1, twin pregnancy with microinjection, Gestational Age 23 weeks and 3 days) referred to our center with a complaints of fever and dry cough and dyspnea. She was admitted with a diagnosis of COVID-19. During the hospitalization, O2 saturation progressively decreased, which led to patient get intubate. Gradual recovery with treatment occurred and the patient was extubed. Unfortunately, she was intubated again due to decreased O2 saturation, 5 days later. Liver enzymes increased, then both fetuses died intrauterine, the cardiac output then declined to 10% and the mother died within hours

    Novel VPS13B Mutations in Three Large Pakistani Cohen Syndrome Families Suggests a Baloch Variant with Autistic-Like Features.

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    BackgroundCohen Syndrome (COH1) is a rare autosomal recessive disorder, principally identified by ocular, neural and muscular deficits. We identified three large consanguineous Pakistani families with intellectual disability and in some cases with autistic traits.MethodsClinical assessments were performed in order to allow comparison of clinical features with other VPS13B mutations. Homozygosity mapping followed by whole exome sequencing and Sanger sequencing strategies were used to identify disease-related mutations.ResultsWe identified two novel homozygous deletion mutations in VPS13B, firstly a 1 bp deletion, NM_017890.4:c.6879delT; p.Phe2293Leufs*24, and secondly a deletion of exons 37-40, which co-segregate with affected status. In addition to COH1-related traits, autistic features were reported in a number of family members, contrasting with the "friendly" demeanour often associated with COH1. The c.6879delT mutation is present in two families from different regions of the country, but both from the Baloch sub-ethnic group, and with a shared haplotype, indicating a founder effect among the Baloch population.ConclusionWe suspect that the c.6879delT mutation may be a common cause of COH1 and similar phenotypes among the Baloch population. Additionally, most of the individuals with the c.6879delT mutation in these two families also present with autistic like traits, and suggests that this variant may lead to a distinct autistic-like COH1 subgroup

    Higher entropy observed in SARS-CoV-2 genomes from the first COVID-19 wave in Pakistan

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    Background: We investigated the genome diversity of SARS-CoV-2 associated with the early COVID-19 period to investigate evolution of the virus in Pakistan.Materials and methods: We studied ninety SARS-CoV-2 strains isolated between March and October 2020. Whole genome sequences from our laboratory and available genomes were used to investigate phylogeny, genetic variantion and mutation rates of SARS-CoV-2 strains in Pakistan. Site specific entropy analysis compared mutation rates between strains isolated before and after June 2020.Results: In March, strains belonging to L, S, V and GH clades were observed but by October, only L and GH strains were present. The highest diversity of clades was present in Sindh and Islamabad Capital Territory and the least in Punjab province. Initial introductions of SARS-CoV-2 GH (B.1.255, B.1) and S (A) clades were associated with overseas travelers. Additionally, GH (B.1.255, B.1, B.1.160, B.1.36), L (B, B.6, B.4), V (B.4) and S (A) clades were transmitted locally. SARS-CoV-2 genomes clustered with global strains except for ten which matched Pakistani isolates. RNA substitution rates were estimated at 5.86 x10-4. The most frequent mutations were 5\u27 UTR 241C \u3e T, Spike glycoprotein D614G, RNA dependent RNA polymerase (RdRp) P4715L and Orf3a Q57H. Strains up until June 2020 exhibited an overall higher mean and site-specific entropy as compared with sequences after June. Relative entropy was higher across GH as compared with GR and L clades. More sites were under selection pressure in GH strains but this was not significant for any particular site.Conclusions: The higher entropy and diversity observed in early pandemic as compared with later strains suggests increasing stability of the genomes in subsequent COVID-19 waves. This would likely lead to the selection of site-specific changes that are advantageous to the virus, as has been currently observed through the pandemic
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