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The purpose of this paper is to evaluate the proximate composition, amino acid and mineral profiles of seafood for human consumption.
Abstract
Purpose
The purpose of this paper is to evaluate the proximate composition, amino acid and mineral profiles of seafood for human consumption.
Design/methodology/approach
A total of 21 seafood species (eight seawater, one fresh water fish, six crustacean and six mollusc species) of commercial importance were chosen and purchased from the Istanbul local fish market. The sample to amino acids analyze was prepared in accordance with the hydrolysis technique described by Waters AccQ.Tag Chemistry Package Method (HPLC). Determination of iron (Fe), sodium (Na), potassium (K), magnesium (Mg), calcium (Ca), selenium (Se), phosphorus (P) and iodine (I) was performed with thermo electron X7 inductively coupled plasma mass spectrometry (ICP‐MS).
Findings
The lipid contents of species were found to be very low and considered as lean. The highest total amino acid values of fishes, crustaceans and molluscs were determined in John Dory, hake, red scorpion fish, spiny lobster, Norway lobster, sea snail and pecten. The mineral content of seafood species were found to be 9.3‐157.11 mg/kg Fe, 558.13‐6095.89 mg/kg Na, 253.25‐1032.29 mg/kg Mg, 125.43‐17174.76 mg/kg Ca, 0.18‐7.76 mg/kg Se, 1586.45‐5811.16 mg/kg P and 0.086‐2.630 mg/kg I.
Originality/value
This paper is helpful to consumers and academics concerning the proximate, amino acid and mineral composition of 21 estimable seafood species (nine fish, six crustacean and six mollusc species).
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Mustafa Serdar Genç, Hacımurat Demir, Mustafa Özden and Tuna Murat Bodur
The purpose of this exhaustive experimental study is to investigate the fluid-structure interaction in the flexible membrane wings over a range of angles of attack for various…
Abstract
Purpose
The purpose of this exhaustive experimental study is to investigate the fluid-structure interaction in the flexible membrane wings over a range of angles of attack for various Reynolds numbers.
Design/methodology/approach
In this paper, an experimental study on fluid-structure interaction of flexible membrane wings was presented at Reynolds numbers of 2.5 × 104, 5 × 104 and 7.5 × 104. In the experimental studies, flow visualization, velocity and deformation measurements for flexible membrane wings were performed by the smoke-wire technique, multichannel constant temperature anemometer and digital image correlation system, respectively. All experimental results were combined and fluid-structure interaction was discussed.
Findings
In the flexible wings with the higher aspect ratio, higher vibration modes were noticed because the leading-edge separation was dominant at lower angles of attack. As both Reynolds number and the aspect ratio increased, the maximum membrane deformations increased and the vibrations became visible, secondary vibration modes were observed with growing the leading-edge vortices at moderate angles of attack. Moreover, in the graphs of the spectral analysis of the membrane displacement and the velocity; the dominant frequencies coincided because of the interaction of the flow over the wings and the membrane deformations.
Originality/value
Unlike available literature, obtained results were presented comparatively using the sketches of the smoke-wire photographs with deformation measurement or turbulence statistics from the velocity measurements. In this study, fluid-structure interaction and leading-edge vortices of membrane wings were investigated in detail with increasing both Reynolds number and the aspect ratio.
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Ramazan Özkan and Mustafa Serdar Genç
Wind turbines are one of the best candidates to solve the problem of increasing energy demand in the world. The aim of this paper is to apply a multi-objective structural…
Abstract
Purpose
Wind turbines are one of the best candidates to solve the problem of increasing energy demand in the world. The aim of this paper is to apply a multi-objective structural optimization study to a Phase II wind turbine blade produced by the National Renewable Energy Laboratory to obtain a more efficient small-scale wind turbine.
Design/methodology/approach
To solve this structural optimization problem, a new Non-Dominated Sorting Genetic Algorithm (NSGA-II) was performed. In the optimization study, the objective function was on minimization of mass and cost of the blade, and design parameters were composite material type and spar cap layer number. Design constraints were deformation, strain, stress, natural frequency and failure criteria. ANSYS Composite PrepPost (ACP) module was used to model the composite materials of the blade. Moreover, fluid–structure interaction (FSI) model in ANSYS was used to carry out flow and structural analysis on the blade.
Findings
As a result, a new original blade was designed using the multi-objective structural optimization study which has been adapted for aerodynamic optimization, the NSGA-II algorithm and FSI. The mass of three selected optimized blades using carbon composite decreased as much as 6.6%, 11.9% and 14.3%, respectively, while their costs increased by 23.1%, 29.9% and 38.3%. This multi-objective structural optimization-based study indicates that the composite configuration of the blade could be altered to reach the desired weight and cost for production.
Originality/value
ACP module is a novel and advanced composite modeling technique. This study is a novel study to present the NSGA-II algorithm, which has been adapted for aerodynamic optimization, together with the FSI. Unlike other studies, complex composite layup, fiber directions and layer orientations were defined by using the ACP module, and the composite blade analyzed both aerodynamic pressure and structural design using ACP and FSI modules together.
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Elif Gürsoy, Havva Yeşildere Sağlam, Fatma Başaran, Emine Çetin Atay and Nurgül Şimal Yavuz
The purpose of this study was to determine the relationship between the leadership orientations of nurses and their clinical decision-making skills.
Abstract
Purpose
The purpose of this study was to determine the relationship between the leadership orientations of nurses and their clinical decision-making skills.
Design/methodology/approach
This descriptive study was conducted between June and December 2018 on nurses working at three hospitals in Turkey. This study was completed with 1,100 nurses. The Personal Information Form, Leadership Orientation Scale and Clinical Decision-Making Scale in Nursing were used for data collection.
Findings
A significant correlation was found between the leadership orientations of nurses and age, sex, institution where they were employed, time spent in the profession, being in a management position and satisfaction with the current unit of employment (p < 0.05), and a significant correlation was found between clinical decision-making skills of nurses and age, sex and occupational status (p < 0.05). Furthermore, a significant correlation was found between the mean scores of the Leadership Orientation Scale and Clinical Decision-Making in Nursing Scale (p < 0.05).
Originality/value
The development of leadership orientations of nurses positively affects their clinical decision-making skills. In this respect, it is important to instill effective leadership orientations in nurses and to incorporate novel training methods in nursing education to develop accurate and timely clinical decision-making skills.
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Yigit Kazancoglu, Melisa Ozbiltekin, Yesim Deniz Ozkan Ozen and Muhittin Sagnak
This study aims to propose an electronic waste collection and classification system to enhance social, environmental and economic sustainability by integrating data-driven…
Abstract
Purpose
This study aims to propose an electronic waste collection and classification system to enhance social, environmental and economic sustainability by integrating data-driven technologies in emerging economies.
Design/methodology/approach
GM (1, 1) model under grey prediction is used in this study in order to estimate the trend of the amount of collected electronic waste in emerging economies.
Findings
It is revealed that the amount of collected electronic waste is increasing day by day, and within the framework of sustainability in the process of collecting and classification of electronic waste, digital technologies were found to be lacking. It has been determined that this deficiency, together with the increasing amount of electronic waste, has caused environmental, social and economic damage to emerging economies.
Originality/value
The main originality of this study is integrating electronic waste collection and classification processes with data-driven technologies and sustainability, which is a relatively new subject.
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This book is aimed at extending the study of network collaboration beyond the context of advanced democracies through the exploration of policy networks in Turkey – a country with…
Abstract
This book is aimed at extending the study of network collaboration beyond the context of advanced democracies through the exploration of policy networks in Turkey – a country with statist policy style and authoritarian political culture. The focus here will be on cross-sectoral collaboration taking place within the Turkish health sector – a policy area that has been steadily improving with the initiation of the Health Transformation Programme (HTP) in 2003. To date, many scholars have studied the outcomes of the HTP reforms on the healthcare system including indicators such as healthcare access, health insurance coverage and healthcare services. However, despite the transformative nature of the program, a limited number of studies have assessed the impact of HTP reforms on changing policy and governance patterns in Turkey. Considering this gap in the literature, the aim of this book is to empirically examine the context, capacity and consequences of cross-sectoral collaboration within the health sector in Turkey through a micro- and meso-level investigation of policy networks developed in the sub-areas of public health, medical industry, and health tourism covering the years between 2011 and 2015. Furthermore, this book provides an account of those factors that impede cross-sectoral arrangements from turning into venues of policy collaboration. Such juxtaposition is designed to enhance the understanding of policy networks as conceptual devices and practical tools of collaboration in public policy.
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Ana Topalović, Mirko Knežević, Ljubica Ivanović, Maja Mikulic-Petkovsek and Višnja Bogdanović
This study aims to examine the relationship between the chemical composition of juices obtained from fruits of autochthonous wild pomegranate (Punica granatum L.) grown in…
Abstract
Purpose
This study aims to examine the relationship between the chemical composition of juices obtained from fruits of autochthonous wild pomegranate (Punica granatum L.) grown in Montenegro and their cytotoxic effects on cancer cells.
Design/methodology/approach
To explore the potential value of wild pomegranate fruits, in vitro biological assays were carried out with juices whose composition was analyzed in detail for sugars, organic acids, vitamin C and phenolic compounds. The effect of juices on survival was determined in human lung A549, cervical HeLa and breast MCF-7 carcinoma cells by MTT assay. As a control, the cytotoxicity against normal fetal lung fibroblasts (MRC-5) was monitored.
Findings
Among cancer cell lines, considering the IC50 related to total phenolics, the lowest value – 13 µg/mL was found for the A549. The strongest effect on lung cells was assumed due to the favorable contribution of ellagitannins to total phenolics in juice as well as the given combination of anthocyanins and their synergistic action. For HeLa cells, the lowest IC50 value was obtained at 88 µg/mL, and the cytotoxicity could be matched with the effects of anthocyanins and catechin. For MCF-7 cells, the lowest IC50 was 504 µg/mL, and the elevated levels of vitamin C and ellagic acid derivatives should have a noticeable effect on these cells.
Originality/value
This study provides an important contribution to the knowledge on the effect of phytochemicals from wild pomegranate juice on lung, cervical and breast cancer cells, in vitro. The present observations suggest that the juice of wild pomegranate has the potential in the fight against cancer.
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Tamanna Dalwai, Syeeda Shafiya Mohammadi and Elma Satrovic
This study aims to investigate the roles of intellectual capital efficiency and institutional ownership on cash holdings and their speed of adjustment.
Abstract
Purpose
This study aims to investigate the roles of intellectual capital efficiency and institutional ownership on cash holdings and their speed of adjustment.
Design/methodology/approach
Using a sample of 432 firm-year observations of tourism-listed companies, three measures of cash holdings are used as dependent variables and intellectual capital efficiency and institutional ownership as independent variables. The financial data is collected from the S&P Capital IQ database for the period 2015–2020. Two system-generalized methods of moment estimation are used for the robustness checks of the results.
Findings
The study provides evidence that an increase in intellectual capital efficiency in tourism firms results in lower cash holdings. The research findings also report that characteristics such as firm size, age and market-to-book value ratio are associated with cash holdings. Furthermore, institutional ownership in these firms did not affect the cash holdings. The results also confirm the existence of a target cash holding level to which the tourism firms attempt to converge. These results are robust to the alternative proxy of cash holding and endogeneity tests.
Research limitations/implications
The study uses intellectual capital efficiency measured by the model proposed by Pulic. Alternative measures of intellectual capital can be included in future studies. Future research can also investigate the impact on cash holdings before and during the pandemic for tourism companies. The study is limited to the impact of institutional ownership; thus, research can be extended to consider other types of ownership.
Practical implications
The findings of this study indicate that tourism companies should take into account the impact of intellectual capital efficiency on their cash holding decisions. The industry uses a specific financial management strategy in light of better efficiency and possibly values the opportunity cost of holding more cash. Additionally, regulators should re-examine the role of institutional ownership in tourism firms, as it was found to have no impact on cash holdings. The regulators may need to consider other factors, such as firm size and age, when developing policies and regulations to ensure that tourism firms have adequate cash holdings.
Originality/value
This study adds to the body of knowledge on the factors that influence cash management and ideal cash levels for the tourism industry. The examination of the effect of intellectual capital on cash holdings is a novel contribution, filling a gap in the existing literature. The findings on the speed of adjustment towards optimal cash holdings also provide support for the trade-off theory.
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