Search results

1 – 10 of 39
Per page
102050
Citations:
Loading...
Access Restricted. View access options
Article
Publication date: 19 May 2023

Yinfeng Li, Guilan Jiang, Hua Long, Yifa Liao, Mingzheng Huang, Zhihai Yu, Shuang Cheng, Ying Wang and Xiaozhu Liu

Increased ethanol accumulation during ethanol fermentation generates stress in yeast cells, which finally reduces the fermentation performance and efficiency. Trehalose, a…

116

Abstract

Purpose

Increased ethanol accumulation during ethanol fermentation generates stress in yeast cells, which finally reduces the fermentation performance and efficiency. Trehalose, a potential stress protectant, has been reported to regulate the response of yeast to diverse environmental stresses. This study aimed to explore how exogenous trehalose application affects the survival, transcriptome and antioxidant enzymes of Wickerhamomyces anomalus grown under ethanol stress conditions.

Design/methodology/approach

Exogenous trehalose was applied to the growth condition of W. anomalus, and optical densitometric method was used to detect contents of intracellular trehalose and MDA and activities of CAT and SOD. The survival was evaluated using spot analysis. Differentially expressed genes (DEGs) were identified through transcriptomics analysis.

Findings

The results showed that ethanol stress induced the accumulation of intracellular trehalose, with further exogenous trehalose application improving the survival and alleviating oxidative stress in ethanol-stressed W. anomalus. Transcriptomic results showed that trehalose has pleiotropic regulating effects on ethanol-stressed W. anomalus since most DEGs annotated to energy metabolism, amino acid metabolism, translation, folding, sorting and transport were affected post trehalose addition. Therefore, it is found that trehalose protected W. anomalus against ethanol stress, and these findings provide interesting insights into the mechanistic role of trehalose in improving ethanol stress tolerance of W. anomalus.

Originality/value

(1) Protective effect of exogenous trehalose addition on the survival of ethanol-stressed W. anomalus was proved. (2) Exogenous trehalose addition could partly alleviate oxidative stress induced by ethanol stress and affect transcriptome in W. anomalus.

Details

British Food Journal, vol. 125 no. 10
Type: Research Article
ISSN: 0007-070X

Keywords

Access Restricted. View access options
Article
Publication date: 24 August 2021

Mohaddese Omidi, Behzad Zohrevandi and Enayatollah Homaie Rad

As a human right, people need to arrive early at the hospitals when they are injured in traffic accidents. Both the mean and equality of the time of arriving at the hospital are…

56

Abstract

Purpose

As a human right, people need to arrive early at the hospitals when they are injured in traffic accidents. Both the mean and equality of the time of arriving at the hospital are important. This study aimed to investigate inequality in arrival time of emergent traffic accident patients to the hospital in 2018–2019 in a city in the North of Iran.

Design/methodology/approach

The authors extracted the data from the Guilan province trauma system databank in Poursina Hospital in Rasht in 2018 and 2019. The Gini coefficient was used to calculate inequality, and a regression model was estimated for determining the reason for inequality in time to receive hospital services.

Findings

The study showed that patients’ arrival time from the time of the accident to the time of arrival to the hospital was 64.48 ± 47.63 min (minimum of 9 min and maximum 462 min). Gini coefficient was 0.31 (p <0.001), which does not show high inequality. Regression results showed that the transfer time of patients by car was 40 min longer (p-value <0.001) than ambulances (p = 0.036). In children, the transfer time was 42 min less (p = 0.003). Other variables did not explain the inequality (p > 0.05).

Originality/value

According to the time of arrival of patients and Gini index, in Rasht, inequality in providing services is not in a bad condition. This indicates that the emergency department does not systematically transport people to the hospital late.

Details

International Journal of Human Rights in Healthcare, vol. 16 no. 3
Type: Research Article
ISSN: 2056-4902

Keywords

Access Restricted. View access options
Article
Publication date: 5 October 2018

Amir Norouzzadeh, Reza Ansari and Hessam Rouhi

It has been revealed that application of the differential form of Eringen’s nonlocal elasticity theory to some cases (e.g. cantilevers) leads to paradoxical results, and recourse…

157

Abstract

Purpose

It has been revealed that application of the differential form of Eringen’s nonlocal elasticity theory to some cases (e.g. cantilevers) leads to paradoxical results, and recourse must be made to the integral version of Eringen’s nonlocal model. The purpose of this paper, within the framework of integral form of Eringen’s nonlocal theory, is to study the bending behavior of nanoscale plates with various boundary conditions using the isogeometric analysis (IGA).

Design/methodology/approach

The shear deformation effect is taken into account according to the Mindlin plate theory, and the minimum total potential energy principle is utilized in order to derive the governing equations. The relations are obtained in the matrix-vector form which can be easily employed in IGA or finite element analysis. For the comparison purpose, the governing equations are also derived based on the differential nonlocal model and are then solved via IGA. Comparisons are made between the predictions of integral nonlocal model, differential nonlocal model and local (classical) model.

Findings

The bending analysis of nanoplates under some kinds of edge supports indicates that using the differential model leads to paradoxical results (decreasing the maximum deflection with increasing the nonlocal parameter), whereas the results of integral model are consistent.

Originality/value

A new nonlocal formulation is developed for the IGA of Mindlin nanoplates. The nonlocal effects are captured based on the integral model of nonlocal elasticity. The formulation is developed in matrix-vector form which can be readily used in finite element method. Comparisons are made between the results of differential and integral models for the bending problem. The proposed integral model is capable of resolving the paradox appeared in the results of differential model.

Details

Multidiscipline Modeling in Materials and Structures, vol. 14 no. 5
Type: Research Article
ISSN: 1573-6105

Keywords

Access Restricted. View access options
Article
Publication date: 19 January 2015

Fatemeh Haghdoost, Vahid Mottaghitalab and Akbar Khodaparast Haghi

The purpose of the current study is to explore the potential possibility of acceleration in recognition, remedial process of heart disease and continuous electrocardiogram (ECG…

2587

Abstract

Purpose

The purpose of the current study is to explore the potential possibility of acceleration in recognition, remedial process of heart disease and continuous electrocardiogram (ECG) signal acquisition. The textile-based ECG electrode is prepared by inkjet printing of activator followed by electroless plating of nickel (Ni) particle.

Design/methodology/approach

The electrical resistance shows a range of around 0.1 Ω/sq, which sounds quite proper for ECG signal acquisition, as the potential difference according to heart activity on skin surface is in milivolt range. Surface modifications of Ni–phosphorus (P)-plated polyester fiber were studied by scanning electron microscopy, energy dispersive X-ray spectroscopy and X-ray diffractionmethods. The quality of the acquired signal from printed square-shaped sensors in two sizes with areas of 9 and 16 cm2 compared with the standard Ag/Agcl electrode using commercial ECG with the patient in the sitting position.

Findings

Comparison of these data led to the consideration of small fabric sensor for better performance and the least disturbance regarding homogeneity and attenuation in electric field scattering. Using these types of sensors in textile surface because of flexibility will provide more freedom of action to the user. Wearable ECG can be applied to solve the problems of the aging population, increasing demand for health services and lack of medical expert.

Originality/value

In the present research, a convenient, inexpensive and reproducible method for the patterning of Ni features on commercial polyester fabric was investigated. Printed designs with high electrical conductivity can be used as a cardiac receiving signals’ sensor.

Details

Sensor Review, vol. 35 no. 1
Type: Research Article
ISSN: 0260-2288

Keywords

Access Restricted. View access options
Article
Publication date: 27 October 2021

Marjan Mahdavi-Roshan, Arsalan Salari, Eshagh Mohammadyari, Tofigh Yaghubi Kalurazi, Aydin Pourkazemi, Azin Vakilpour, Morteza Rahbar Taramsari and Zeinab Ghorbani

It is argued that COVID-19 patients show various neuropsychiatric symptoms, including fatigue, depression and anxiety. On the other hand, epidemiological and experimental evidence…

206

Abstract

Purpose

It is argued that COVID-19 patients show various neuropsychiatric symptoms, including fatigue, depression and anxiety. On the other hand, epidemiological and experimental evidence indicated that green tea could potentially have antiviral effects and ameliorate psychiatric disorders. However, there is a lack of clinical evidence. The purpose of this study was to investigate whether drinking green tea can clinically improve psychiatric complications of COVID-19 infection.

Design/methodology/approach

This study included 40 patients with laboratory confirmed mild-to-moderate COVID-19 disorder in the current randomized open-label controlled trial. Patients were instructed to include three cups/day of green tea (intervention) or black tea (control) to their usual diet for four weeks immediately after diagnosis of the disease. At the study baseline and after the intervention, the enrolled patients’ fatigue, depression and anxiety were assessed by the Chalder Fatigue Scale, Beck Depression Inventory-Fast Screen and State-Trait Anxiety Inventory questionnaires.

Findings

A total of 19 COVID-19 cases in the intervention group (mean age = 52 years) and 14 cases (mean age = 50 years) in the control group completed the study. Analysis of covariance adjusted for baseline levels, and confounders revealed that those who consumed three cups/day of green tea compared to the patients who received black tea experienced significantly lower fatigue, depression and state and trait anxiety levels (adjusted means for fatigue = 12.3 vs 16.2 (P = 0.03), depression = 0.53 vs 1.8 (P = 0.01), 37.4 vs 45.5 (P < 0.01) and 37.9 vs 45.2 (P < 0.01)).

Research limitations/implications

The open-label design may bias the evaluation of the self-reported status of fatigue, depression or anxiety as the main outcomes assessed. Moreover, as this study did not include patients with severe COVID-19, this might affect the generalizability of the present results. Thus, the recommendation of daily drinking green tea may be limited to the subjects diagnosed with mild-to-moderate type of infection or those with long-term neuropsychiatric complications owing to COVID-19. Besides, considering the ethical issues, this study could not exclude the drug therapy’s confounding effects; thereby, this point should be considered when interpreting the current results. Besides, it is worth noting that Guilan province in the north of Iran is recognized as a tea (and particularly green tea) producing region; thereby, it is an available and relatively inexpensive product. Considering this issue, the recommendation to consume this medicinal plant in adjunct to the routine treatment approach among patients with mild-to-moderate COVID-19 based on its beneficial effects may be widely accepted.

Practical implications

Green tea consumption could be considered an option to combat COVID-19 associated psychological complications, including fatigue, depression and anxiety among patients suffering from mild-to-moderate type of this viral infection.

Originality/value

To the best of the authors’ knowledge, in this study, for the first time, the effects of green tea compared to black tea on COVID-19 associated fatigue, depression and anxiety status within an open-label controlled trial have been investigated.

Details

Nutrition & Food Science , vol. 52 no. 4
Type: Research Article
ISSN: 0034-6659

Keywords

Access Restricted. View access options
Article
Publication date: 3 September 2024

Arezoo Taghavy, Narges Hazari and Milad Hooshmand Chaijani

In uncertain and emerging conditions, businesses must adopt new strategies to compete and survive the changing and unstable environment. This research seeks to investigate the…

77

Abstract

Purpose

In uncertain and emerging conditions, businesses must adopt new strategies to compete and survive the changing and unstable environment. This research seeks to investigate the role of dynamic capabilities in the competitiveness of startups, emphasizing resilience and strategic alignment.

Design/methodology/approach

Isfahan Scientific and Research Town has always been a pioneer in the field of science and technology in Iran and is known as the most extensive technology and knowledge-based complex in Iran. The sample size of 300 companies active in the startup field was selected using a simple random sampling method. Questionnaires were collected from the managers of technological startup companies in Isfahan, and the SEM model was used to analyze the data.

Findings

This research shows that dynamic capabilities in terms of coordination, flexibility and integration significantly impact competitiveness. Resilience and strategic alignment also increase the organization’s performance and strengthen the organization in gaining a more competitive advantage in the industry.

Originality/value

Finally, dynamic capabilities indirectly affect competitiveness through resilience and strategic alignment. This shows a need for strategic alignment and resilience to change advantage shape in dynamic conditions.

Details

Asia-Pacific Journal of Business Administration, vol. 17 no. 2
Type: Research Article
ISSN: 1757-4323

Keywords

Access Restricted. View access options
Article
Publication date: 28 May 2024

Soheyla Salimian, Seyed Mehdi Mirmehdi, Reza Salehzadeh and Saeed Moraadipoor

The purpose of this study is to investigate the impact of brand hate, personality traits (jealousy and sadism) and corporate social irresponsibility (CSI) on schadenfreude and the…

127

Abstract

Purpose

The purpose of this study is to investigate the impact of brand hate, personality traits (jealousy and sadism) and corporate social irresponsibility (CSI) on schadenfreude and the effects of brand hate, CSI and schadenfreude on purchase intention for counterfeit luxury brands (CLBs).

Design/methodology/approach

The statistical population of this study is consumers of luxury and CLB. Simple random sampling method was used, and data from 200 questionnaires were analyzed through structural equation modeling and SPSS 20 and AMOS 20 software.

Findings

The results indicated that brand hate, personality traits (jealousy and sadism) and CSI have a direct positive effect on schadenfreude. In addition, brand hate, CSI and schadenfreude have a direct positive effect on purchase intention for CLB.

Originality/value

TO the best of the authors’ knowledge, this research is among the first to evaluate the impact of brand hate, personality traits and CSI on schadenfreude and purchase intention.

Details

Journal of Islamic Marketing, vol. 15 no. 10
Type: Research Article
ISSN: 1759-0833

Keywords

Access Restricted. View access options
Article
Publication date: 6 December 2020

Ehsan Fallahiarezoudar, Mohaddeseh Ahmadipourroudposht and Nor Hasrul Akhmal Ngadiman

This study aims to provide an ergonomic design of the monitoring room that has resulted in safe, functional and comfortable environment for the operators, which may lead to…

165

Abstract

Purpose

This study aims to provide an ergonomic design of the monitoring room that has resulted in safe, functional and comfortable environment for the operators, which may lead to improve the efficiency. Currently, uses of closed‐circuit televisions to monitor the critical environments are widely applicable. The information is continuously transferred and analyzed through a center called monitoring room.

Design/methodology/approach

Here, through creating a systematic analysis, a series of experiments was performed initially to evaluate and then optimize the parameters such as illumination, visual angle, operator-screen distance, number of scenes display in a single screen, workstation height, screen dimension and monitoring time that may affect the visual skill of the operators. Taguchi orthogonal array was used to analyze the significance of parameters on operator’s response time to a threat. The five parameters were distinguished as significant. Later response surface methodology was utilized to optimize the parameters.

Findings

Quadratic empirical model developed for the response time exposes the optimum response time was achievable at illumination of 500 lux, visual angle of 13°, operator-screen distance of 60 cm, three scenes, workstation height of 120 cm, screen dimension of 34” and monitoring time of 15 min. This shortened the response time by 28 per cent. The adequacy of the fitted model was successfully verified using the confirmation test with α = 95 per cent.

Originality/value

The novelty of this work lies in the application of a systematic statistical analysis, which enables considering the interaction among the noise parameters and controllable one simultaneously. Furthermore, the obtained regression model can widely be used for adjusting the parameters accordingly based on various anthropometric data.

Details

Facilities , vol. 39 no. 7/8
Type: Research Article
ISSN: 0263-2772

Keywords

Available. Open Access. Open Access
Article
Publication date: 6 November 2024

Morteza Charkhabi, Naghi Radi Afsouran, Laura K. Johnson and Frédéric Dutheil

Job insecurity is one of the most hazardous work stressors in the twenty-first century, placing employees between employment and unemployment may threaten employees’ health in the…

180

Abstract

Purpose

Job insecurity is one of the most hazardous work stressors in the twenty-first century, placing employees between employment and unemployment may threaten employees’ health in the workplaces. Using a systematic review, the first aim of this study is to list the mediators and moderators of the link between job insecurity and health-related outcomes, and second, to explain and discuss the mechanisms that could explain the mediating and moderating effects.

Design/methodology/approach

We searched four databases (Science Direct, PubMed, Springer Link and Google Scholar) from 2008 to 2018 to detect these mediators and moderators. Also, as the study was conducted during COVID-19 pandemic, we particularly searched and reported the same associations over this period (2019–2022).

Findings

The results of the review suggest that job insecurity negatively influences a wide range of both health- and safety-related outcomes in the workplace. The results also showed that the most studied mediator and moderator of the job insecurity-health link over the past 10 years has been workload and employability. During COVID-19, the number of studies on mediators were more than moderators and coping strategies appeared to gain more research attention. Additionally, this review suggests that, to explain the mediation and moderation effects, a combination of cognitive appraisal theory and the conservation of resources theory can be used.

Originality/value

Although this review suggests that job insecurity detrimentally influences employee health, the severity of this impact on health-related outcomes may vary by the effects of various moderators.

Details

European Journal of Management Studies, vol. 29 no. 3
Type: Research Article
ISSN: 2183-4172

Keywords

Access Restricted. View access options
Article
Publication date: 6 November 2017

Ali Shams Nateri, Abbas Hajipour, Saeedeh Balarak and Gholam Khayati

This study aimed to Simultaneous matching of color and antimicrobial properties of silk fabric treated with silver nanoparticle. The antimicrobial finishing using silver…

181

Abstract

Purpose

This study aimed to Simultaneous matching of color and antimicrobial properties of silk fabric treated with silver nanoparticle. The antimicrobial finishing using silver nanoparticles (AgNPs) is one of the most important finishing processes in the textile industry. Color matching is widely applied in the textile industry, but there has been a need for the prediction of AgNPs concentration for the matching of dyed silver-treated samples.

Design/methodology/approach

In this research, the silk fabrics were dyed with various concentrations of C.I. Acid Red 359 dye at 0.5, 1, 1.5 and 2 per cent (w/w). The dyed fabrics were then coated with AgNPs in several concentrations at 0.015, 0.030, 0.050, 0.100 and 0.250 ml/l. The prediction of dye and AgNPs concentrations were evaluated using single constant color matching and artificial neural network techniques.

Findings

The obtained results indicate that the accuracy of dye concentration prediction, as well as AgNPs concentration prediction, was improved by using a neural network method. Also, the correlation between actual and predicted dye and AgNPs concentrations in the best neural networks is more than the single constant color matching method.

Originality/value

Simultaneous antibacterial and color matching of nanosilver-treated fabric is novel. This method achieved acceptable accuracy for antibacterial and color matching.

Details

Pigment & Resin Technology, vol. 46 no. 6
Type: Research Article
ISSN: 0369-9420

Keywords

1 – 10 of 39
Per page
102050