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Article
Publication date: 23 August 2011

Antonio Caballero and Jean‐Francois Molinari

This paper aims to describe a numerical approach to the fragmentation of kidney stones by direct impact.

Abstract

Purpose

This paper aims to describe a numerical approach to the fragmentation of kidney stones by direct impact.

Design/methodology/approach

The numerical approach consists of a Lagrangian finite element formulation with dynamic insertion of cohesive‐free surfaces. Cohesive free surfaces are governed by a damage constitutive model whereas the continuum part of the mesh remains linear elastic. The impact of the metallic probe of the medical device is modeled with a displacement control of the nodes inside the area of impact on the stone.

Findings

The results show the relation between the total energy transmitted during the impact with the damage and the fragmentation (number of fragments and number of microcrack clusters) of the kidney stone. The paper establishes the existence of both, an activation and saturation energy level, that delimit a range optimum working energy transmitted during the impact. In particular, the computations show that, for the calcium oxalate monohydrate stone, the maximum energy supplied by the medical device (Lithoclast) coincides with the saturation energy level.

Originality/value

In medical investigations, the experimentation is always restricted to the availability of patients or specimens. In the particular case of the elimination of renal calculi, the literature exhibits an extensive number of works reporting the practical experience of medical doctors. However, there is still a lack of information that might help to understand and to improve the comminution of kidney stones.

Details

Engineering Computations, vol. 28 no. 6
Type: Research Article
ISSN: 0264-4401

Keywords

Article
Publication date: 12 July 2013

Neda Lotfi Yagin, Reza Mahdavi and Zeinab Nikniaz

Although black tea is commonly consumed in Iran, within the last years the popularity of green tea, especially green tea bags, has dramatically increased due to all…

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Abstract

Purpose

Although black tea is commonly consumed in Iran, within the last years the popularity of green tea, especially green tea bags, has dramatically increased due to all scientific papers reporting that green tea has benefit impacts on human health. Considering the postulated role of increased dietary oxalate intake on calcium oxalate stone formation, this paper aimed to study the oxalate content of most popular green and black tea bags consumed in Iran.

Design/methodology/approach

Five green tea samples and ten black tea samples were purchased from various markets in Tabriz, Iran. The oxalate content of each sample after infusion for five minutes was measured in triplicate using an enzymatic assay. Statistical analysis used: the ANOVA with Tukey's post‐hoc test, and also an independent t‐test were used for statistical analysis.

Findings

The oxalate concentration in different brands of green tea bags ranged from 0.73 to 1.75 and from 3.69 to 6.31 mg/240 ml for black tea bags. There were significant differences in oxalate content of different brands, both in green and black tea bags (P<0.001). The mean oxalate content of green and black tea samples also differed significantly from each other (P<0.001).

Originality/value

From the oxalate point of view, consumption of green and black tea bags infusions several times per day may not pose significant health risks in kidney stone patients and susceptible individuals.

Details

Nutrition & Food Science, vol. 43 no. 4
Type: Research Article
ISSN: 0034-6659

Keywords

Article
Publication date: 1 February 2011

Yingheng Zhou and Erpeng Wang

This paper aims to analyze the factors that influence urban consumers' attitudes towards food safety after the melamine scandal.

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Abstract

Purpose

This paper aims to analyze the factors that influence urban consumers' attitudes towards food safety after the melamine scandal.

Design/methodology/approach

Based on the research about the attitudes of urban consumers in Nanjing towards the safety of milk powder after the melamine scandal in 2008, this paper adopts the ordered logit model to test which factors significantly influence consumers' attitudes.

Findings

The findings suggest that: first, there is a common concern among consumers about the safety of milk powder after the melamine scandal; second, according to the research, the concern is in inverse relation to the level of educational attainment, consumers' awareness of food safety incidents and their opinion of governments' action after the incident. Moreover, those who always have a concern about the safety of the alternatives to milk powder are more easily affected.

Originality/value

Different from other researches, the paper focuses on consumers' attitudes towards food safety by studying a specific case, namely the melamine scandal.

Details

China Agricultural Economic Review, vol. 3 no. 1
Type: Research Article
ISSN: 1756-137X

Keywords

Article
Publication date: 12 April 2022

Hildemar Dos Santos, Diane Han, Mayabel Perez, Summer Johnson and Razaz Shaheen

To gain a better and more comprehensive understanding, this study aims to investigate the literature to explore the two popular diets’ health benefits and concerns. Google…

Abstract

Purpose

To gain a better and more comprehensive understanding, this study aims to investigate the literature to explore the two popular diets’ health benefits and concerns. Google Scholar and PubMed were used to search for available and relevant nutrition and health articles that pertain to the benefits and concerns of plantogenic and ketogenic diets. Search terms like low carbohydrate, diet, ketogenic, vegetarian and chronic diseases were used. Information was obtained from review articles and original research articles and checked for accuracy. Ketogenic diets have been used for a long time for convulsion in children and now reappeared for weight loss purposes.

Design/methodology/approach

Ketogenic and plantogenic (plant-based) diets have been adopted today by many professionals and the public.

Findings

Ketogenic diets have been used for a long time for convulsion in children and now reappeared for weight loss purposes. Plantogenic diets also have been practiced for many years for religious, health and environmental reasons. Compared to plantogenic diets, ketogenic diets lack long-term evidence of its potential benefits and harm.

Research limitations/implications

Maybe Lacto-ovo vegetarian and pesco-vegetarian (eat fish but not meats) diets are OK. However, for strict plantogenic diets (total plantogenic/vegan diet), the risk of mineral or vitamin deficiency is present (Melina et al., 2016). Of particular concern is dietary vitamin B12, which is obtained mostly from animal sources (Melina et al., 2016). A long-term deficiency of vitamin B12 can lead to macrocytic anemia and cause neuro and psychological effects (Obeid et al., 2019). Also, omega-3 fatty acids may be deficient in such a diet and probably need to be supplemented on those who follow the total plantogenic diet (Melina et al., 2016). Other deficiencies of concern would be zinc, iron, calcium, vitamin D and iodine (Melina et al., 2016). Another disadvantage is that many junk foods could be easily classified within the plantogenic diet, such as sugar, cakes, French fries, white bread and rice, sugar-sweetened beverages and sweets in general. These items are related to higher weight gain and, consequently, to a higher incidence of diabetes and other chronic diseases (Schulze et al., 2004; Malik et al., 2006; Fung et al., 2009).

Originality/value

Plantogenic diets were concluded to have sustainable health benefits for humans and the environment over ketogenic diets, which could be used but under professional follow-up only.

Details

Nutrition & Food Science , vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 0034-6659

Keywords

Article
Publication date: 7 December 2020

Fahimeh Esnaasharan, Mansour Alizadeh, Parvin Ayremlou and Rasoul Zarrin

The purpose of this study is to investigate the relationship between pH of water or other daily fluid intake and risk of kidney stones in adult men.

Abstract

Purpose

The purpose of this study is to investigate the relationship between pH of water or other daily fluid intake and risk of kidney stones in adult men.

Design/methodology/approach

This case–control study included 120 adult men with kidney stones and 240 healthy controls matched by age. Participants were selected from the Urmia Imam Khomeini Educational Hospital in the northwest of Iran by the available sampling method between 2017 and 2018. The mean total daily fluid intake of the subjects over the past one year period was collected using a validated 139-item Food Frequency Questionnaire, and the pH of drinking water samples consumed over the past six months was determined using an electrochemical pH meter. Information on physical activity level and socio-demographic characteristics of all participants was collected.

Findings

The mean pH of daily water consumption was 7.1 ± 250.3 and 7.4%± 250.3 in case and control groups, respectively. In multivariate logistic regression analysis after adjusting for the covariates 25 a significant relationship was detected between the pH of drinking water (not for other fluid intake26) and kidney stone disease (OR = 0.15, CI 0.06–0.4, P > 1. Moreover, no association was found between the volume of total fluid intake and risk of kidney stones.

Originality/value

These findings support potential protective effects of drinking water intake with higher pH level on preventing kidney stones.

Details

Nutrition & Food Science , vol. 51 no. 6
Type: Research Article
ISSN: 0034-6659

Keywords

Article
Publication date: 6 May 2014

Sam Sarpong

The purpose of this paper is to examine the recent horsemeat scandal in European markets. The paper is primarily interested in how this scandal has festered and what…

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Abstract

Purpose

The purpose of this paper is to examine the recent horsemeat scandal in European markets. The paper is primarily interested in how this scandal has festered and what perhaps ought to be done to ensure consumers get what they feel they should be getting. It also attempts to identify the lapses that have created the basis for this to happen.

Design/methodology/approach

The paper mainly draws on reports in the media and discussions generated following the scandal to assess the issues under consideration. It also looks at the issues surrounding the global supply chain environment and provides solutions on how to strengthen the weak links in the meat supply chain.

Findings

The paper finds that the scandal has damaged consumer confidence in the industry's ability to regulate itself. It notes that pinpointing risk has become a difficult struggle as retailers are often inundated with data, and suppliers, for lack of time, have become reluctant to “waste time” completing check-lists and audits. The paper maintains that there is the urgent need for adequate inspection and a means to incentivise the food industry to police itself much better. It recognises that lack of visibility and a lack of direct influence over suppliers further down the supply chain have led to distinct problems within the food industry.

Originality/value

The paper contributes to an ongoing discussion that has been of considerable concern to many consumers. Its importance lies in the fact that it suggests important measures, which, if implemented, could help in ensuring the elimination of fraud in the food chain.

Details

European Business Review, vol. 26 no. 3
Type: Research Article
ISSN: 0955-534X

Keywords

Article
Publication date: 1 March 2016

Annelie Khatami and Kristina Rosengren

Purpose - The aim was to describe an improvement project and its effects on decreasing the time from diagnosis to treatment for patients with kidney stones and to reduce…

Abstract

Purpose

Purpose - The aim was to describe an improvement project and its effects on decreasing the time from diagnosis to treatment for patients with kidney stones and to reduce the negative effects related to untreated stones at one hospital in western Sweden

Design/methodology/approach

Design and methodology - A quantitative descriptive study based on Nolan’s improvement model was used. The quality improvement effects were evaluated using statistical process control (SPC).

Findings

Findings – Extracorporeal shock wave lithotripsy ESWL treatment’s positive effects within 48 hours were described as efficiency (decreased waiting time) from diagnosis to treatment, even if a re-treatment was necessary. The results also showed a reduction in the usage of percutaneous nephropyelostomies as a treatment option.

Research limitations/implications

Research limitations - This study includes data from one department at one hospital in one country. Comparative data include the time from acute radiological examination to final treatment but not total re-treatments, complications or time to up following radiological examination. However, the study was performed over one year and analyzed data from medical records in a systematic way.

Practical implications

Practical implications - This study may inspire measuring and developing routines from diagnosis to treatment for patients who are transferred within different departments at one hospital.

Originality/value

Originality - Studies in improvement projects considering ureteral or kidney stones are generally lacking; thus, this study is important for improving the care of patients with this diagnose.

Details

International Journal of Health Care Quality Assurance, vol. 29 no. 3
Type: Research Article
ISSN: 0952-6862

Article
Publication date: 11 May 2015

Annelie Khatami and Kristina Rosengren

– The purpose of this paper is to describe staff experiences in an on-going improvement project regarding patients with ureteral stones.

Abstract

Purpose

The purpose of this paper is to describe staff experiences in an on-going improvement project regarding patients with ureteral stones.

Design/methodology/approach

A qualitative descriptive study based on eight group interviews and 48 narratives, was performed. Data were analysed using qualitative content analysis. Trustworthiness was ensured by using a well-documented improvement process method during six months.

Findings

The results formed three categories: an absent comprehensive view; complexity; and vulnerability within the organisation. A holistic perspective regarding urological care at the micro-, meso- and macro-levels is needed to improve planning and caring processes.

Research limitations/implications

This study includes one team (six members, different health professionals) within the same urology department.

Practical implications

Results show that staff need information, such as guidelines and support throughout the improvement work to deliver high-quality care. Moreover, there is a need for evidence-based guidelines at national level to support improvement work.

Social implications

Healthcare staff need to pay attention to all team member needs to improve urological care. Organisational and managerial aspect are needed to support clear and common goals regarding healthcare improvement work.

Originality/value

Urological improvement projects, generally, are lacking, which is why this study is important to improve nephrolithiasis patient care.

Details

International Journal of Health Care Quality Assurance, vol. 28 no. 4
Type: Research Article
ISSN: 0952-6862

Keywords

Article
Publication date: 28 August 2019

Simran Kaur, Anil Panghal, M.K. Garg, Sandeep Mann, Sunil K. Khatkar, Poorva Sharma and Navnidhi Chhikara

The purpose of this paper is to review the nutritional and food value of pumpkin Cucurbita, along with different health benefits. Cucurbita (pumpkin) is an herbaceous…

Abstract

Purpose

The purpose of this paper is to review the nutritional and food value of pumpkin Cucurbita, along with different health benefits. Cucurbita (pumpkin) is an herbaceous vine, member of Cucurbitaceae family. It is an edible, heat-sensitive plant, which has an abundant amount of active compounds such as carotenoids, alkaloids, flavonoids, polyphenols, tannins, tocopherols, phytosterols and cucurbitacin, accounted for numerous health benefits, namely, antidiabetic, antioxidant, anticarcinogenic, hypotensive, hyper protective activities.

Design/methodology/approach

Major well-known bibliometric information sources such as Web of Science, Scopus, Mendeley and Google Scholar were searched with keywords such as nutrition value of Cucurbita, Cucurbita utilization, bioactive compounds of pumpkin, health benefits, processing, food formulations and current scenarios were chosen to obtain a large range of papers to be analyzed. A final inventory of 105 scientific sources was made after sorting and classifying them according to different criteria based on topic, academic field, country of origin and year of publication.

Findings

The comprehensive review of different literature, data sources and research papers seeks to find and discuss various nutritional benefits of pumpkin. It contains all necessary macro- and micro-nutrients, amino acids, vitamins, antioxidants and bioactive compounds with a relatively low amount of antinutrients. The recent upsurge in consumer interest for health-promoting products has opened up new vistas for plant products containing bioactive compounds in different food formulations.

Originality/value

This paper contains information regarding the chemical composition, nutritive value, phytochemical studies, pharmacological properties, bio-accessibility, food and industrial applications of pumpkin. Worldwide, pumpkin is used as food additive in various food products such as candy, weaning mix, corn grits, kheer, jam, crackers, bread, etc. Effect of different processing methods such as high temperature, pH, blanching, oven drying, freeze-drying to retain or minimize its losses in case of color, texture, flavor, and the carotenoids are of concern. The review paper highlights the nutritional, therapeutic, potential and processing attributes.

Details

Nutrition & Food Science , vol. 50 no. 2
Type: Research Article
ISSN: 0034-6659

Keywords

Article
Publication date: 11 February 2019

Shabnam Golshan, Tahereh Feizy, Sanaz Tavasoli and Abbas Basiri

Adherence to preventive recommendations improves clinical outcomes and is compulsory for long-term prevention in urolithiasis patients. Service quality can affect…

Abstract

Purpose

Adherence to preventive recommendations improves clinical outcomes and is compulsory for long-term prevention in urolithiasis patients. Service quality can affect patients’ adherence to treatment and care. The purpose of this paper is to compare perceived service quality, using the SERVQUAL model, between urolithiasis patients who were nonadherent to their follow-up visits and those who were adherent, in a stone prevention clinic, Tehran, Iran.

Design/methodology/approach

This was a cross-sectional study on patients with urolithiasis referred to the Shahid-Labbafinejad Hospital stone prevention clinic between 2010 and 2014. All patients withdrawing from follow-up visits were selected as the nonadherent group. Patients with follow-up visits were randomly selected and appointed as the adherent group. Data included demographic, service quality (assessed using the SERVQUAL) and a questionnaire about the reason for withdrawal from follow-up visits. Man–Whitney U test, χ2 and binary logistic regression were used for data analyses.

Findings

In total, 531 nonadherent and 51 adherent patients entered the study. SERVQUAL results revealed that patients’ expectations were significantly higher than their perceptions in all five service quality dimensions in both groups. The adherent group had better-quality scores. Responsibility, assurance and empathy scores significantly increased patient adherence odds.

Research limitations/implications

Uni-center design; missing data, such as socioeconomic status and disease severity, which may influence treatment adherence; and missing data regarding adherence to medication and dietary advice were limitations.

Practical implications

Service quality needs to be improved in all dimensions.

Originality/value

Since responsiveness, assurance and empathy dimensions determined patients’ adherence, giving special attention to these dimensions could improve patient adherence.

Details

International Journal of Health Care Quality Assurance, vol. 32 no. 1
Type: Research Article
ISSN: 0952-6862

Keywords

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