302 research outputs found
Response of Muscat of Alexandria table grapes to post-veraison regulated deficit irrigation in Japan
The effects of post-veraison regulated deficit irrigation (RDI) on vine water status, ripening, and quality of table grapes, cv. Muscat of Alexandria grown under a polyhouse and root-zone restriction condition were investigated in the Okayama University Experimental vineyard, Japan. From bud break to veraison all vines were irrigated to a soil moisture tension of 3 kPa at a depth of 15 cm, and were re-irrigated when soil moisture tension approached 15 kPa. Starting 10 d after veraison, 3 irrigation regimes were imposed: (1) Control (C): Re-irrigation immediately when soil moisture tension reached 15 kPa; (2) Moderate Deficit Irrigation (MDI): Re-irrigation 2 d after reaching a soil moisture tension of 15 kPa; and (3) Severe Deficit Irrigation (SDI): Re-irrigation 4 d after reaching a soil moisture tension of 15 kPa. Treatments were continued for 6 weeks until harvest. By the end of the experiment, as the vine water status decreased, only SDI vines were wilted or necrotic in the fruit-zone. In SDI vines, the cumulative effect of increased vine water deficit indicated by lower Ψl resulted in berries that were lower in firmness and acidity, with a small increase in aroma, and a higher TSS than control at harvest. The decrease in vine water status in the MDI treatment had a slight effect on berry ripening as compared with control while RDI had no effect on berry weight or juice pH at harvest.
Why do consumers trust online travel websites? Drivers and outcomes of consumer trust toward online travel websites
Egypt is currently one of the leading nations especially in the Middle East region with a well-established e-commerce environment and advanced IT infrastructure, but rapid growth of e-commerce will soon occur in other nations with similar consumption patterns. This study tests a model of antecedents (consumer experience, propensity to trust, reputation, perceived website size, ease of use, perceived usefulness, and website quality) and consequences of consumers’ trust toward online travel websites. Trust is expected to predict consumer attitude, perceived risk, and intention to purchase travel online. Data of 1,431 users of online travel websites were selected from the Supreme Council of Universities Database–Egypt (SCU) and analyzed through structural equation modeling. The findings show that all the aforementioned factors with the exception of consumer experience influence consumer trust toward online travel websites. Trust influences consumers’ attitude, perceived risk, and intention to purchase travel online
Do individuals with ankle instability show altered lower extremity kinematics and kinetics during walking? A systematic review and meta-analysis
Supplementary material is available online at: https://www.sciencedirect.com/science/article/pii/S0031940624004292#sec0110 .Objective:
To determine if individuals with chronic ankle instability (CAI) demonstrate altered lower extremity kinematics and kinetics during walking.
Data sources:
Relevant studies were sourced from PubMed, Embase, Cochrane Library, Web of Science, EBSCO and PEDro.
Study selection:
Kinematic and kinetic studies involving joint angle and/or joint moment measured in individuals with CAI were included.
Study appraisal and synthesis methods:
The Risk of Bias in Non-randomised Studies - of Interventions (ROBINS-I) tool was used to assess literature quality. Weighted mean differences (WMDs) in joint angles and moments between CAI and controls were analyzed as continuous variables.
Results:
1261 articles were screened, with a final selection of 13 studies involving 729 participants. Compared to non-CAI controls, CAI participants showed significantly greater ankle inversion angle (degree) (WMD: 3.71, 95% CI: 3.15 to 4.27, p < 0.001), hip adduction angle (degree) (WMD: 1.60, 95% CI: 0.09 to 3.11, p = 0.04), and knee valgus moment (N m/kg) (WMD: 0.07, 95% CI: 0.01 to 0.13, p = 0.02) during walking. Additionally, there were no consistent findings or specific altered patterns in other lower extremity joint angles, or moment changes, regardless of the motion plane (sagittal, coronal, horizontal), for CAI compared with controls.
Conclusions:
This review provides further evidence of altered lower limb kinematics and kinetics in the frontal plane in CAI participants during certain walking phases, which may partially explain the high level of recurrent ankle sprains observed in the CAI population, and support hip abduction and ankle eversion motor control exercises for CAI rehabilitation.
Systematic Review Registration Number:
Systematic Review Registration Number PROSPERO CRD42023420418.We acknowledge the support received from the Science and Technology Commission of Shanghai Municipality, China (Grant no. 20XD1423200)
The impact of diabetes mellitus on survival following resection and adjuvant chemotherapy for pancreatic cancer
BACKGROUND: Diabetes mellitus is frequently observed in pancreatic cancer patients and is both a risk factor and an early manifestation of the disease. METHODS: We analysed the prognostic impact of diabetes on the outcome of pancreatic cancer following resection and adjuvant chemotherapy using individual patient data from three European Study Group for Pancreatic Cancer randomised controlled trials. Analyses were carried out to assess the association between clinical characteristics and the presence of preoperative diabetes, as well as the effect of diabetic status on overall survival. RESULTS: In total, 1105 patients were included in the analysis, of whom 257 (23%) had confirmed diabetes and 848 (77%) did not. Median (95% confidence interval (CI)) unadjusted overall survival in non-diabetic patients was 22.3 (20.8–24.1) months compared with 18.8 (16.9–22.1) months for diabetic patients (P=0.24). Diabetic patients were older, had increased weight and more co-morbidities. Following adjustment, multivariable analysis demonstrated that diabetic patients had an increased risk of death (hazard ratio: 1.19 (95% CI 1.01, 1.40), P=0.034). Maximum tumour size of diabetic patients was larger at randomisation (33.6 vs 29.7 mm, P=0.026). CONCLUSIONS: Diabetes mellitus was associated with increased tumour size and reduced survival following pancreatic cancer resection and adjuvant chemotherapy
Mechanism of nitrogen metabolism-related parameters and enzyme activities in the pathophysiology of autism
<p>Abstract</p> <p>Background</p> <p>There is evidence that impaired metabolism play an important role in the etiology of many neuropsychiatric disorders. Although this has not been investigated to date, several recent studies proposed that nitrogen metabolism-related parameters may have a pathophysiological role in autism.</p> <p>Methods</p> <p>The study enrolled 20 Saudi boys with autism aged 4 to 12 years and 20 healthy controls matched for age and gender. Levels of creatine, urea, ammonia, gamma-aminobutyric acid (GABA), glutamate:glutamine (Glu:Gln) ratio, and enzymatic activities of glutamate dehydrogenase, 5'-nucleotidase, and adenosine deaminase (ADA) were determined in plasma samples from both groups.</p> <p>Results</p> <p>We found a significant elevation of creatine, 5'-nucleotidase, GABA, and glutamic acid and a significant decrease in the enzymatic activity of ADA and glutamine level in patients with autism compared with healthy controls. The most significant variation between the two groups was found in the Glu:Gln ratio.</p> <p>Conclusion</p> <p>A raised Glu:Gln ratio together with positive correlations in creatine, GABA, and 5'-nucleotidase levels could contribute to the pathophysiology of autism, and might be useful diagnostic markers. The mechanism through which these parameters might be related to autism is discussed in detail.</p
Septic rupture of the ascending aorta after aortocoronary bypass surgery
We describe an exceptional case of non-fatal septic rupture of the ascending aorta in a patient with sternal dehiscence, deep sternal wound infection (DSWI) and pleural empyema after aortocoronary bypass surgery. Routine follow-up computed tomography (CT) detected a mediastinal pseudoaneurysm originating from the ascending aorta. Thereby, massive and irregular sternal bone defects and contrast-enhancing mediastinal soft tissue suggest osteomyelitis and highly-active and aggressive DSWI as initial triggers. Urgent thoracotomy 1 day later included ascending aorta reconstruction, total sternum resection and broad wound debridement. Follow-up CT 1 year later showed a regular postoperative result in a fully recovered patient
Novel metabolic biomarkers related to sulfur-dependent detoxification pathways in autistic patients of Saudi Arabia
<p>Abstract</p> <p>Background</p> <p>Xenobiotics are neurotoxins that dramatically alter the health of the child. In addition, an inefficient detoxification system leads to oxidative stress, gut dysbiosis, and immune dysfunction. The consensus among physicians who treat autism with a biomedical approach is that those on the spectrum are burdened with oxidative stress and immune problems. In a trial to understand the role of detoxification in the etiology of autism, selected parameters related to sulfur-dependent detoxification mechanisms in plasma of autistic children from Saudi Arabia will be investigated compared to control subjects.</p> <p>Methods</p> <p>20 males autistic children aged 3-15 years and 20 age and gender matching healthy children as control group were included in this study. Levels of reduced glutathione (GSH), total (GSH+GSSG), glutathione status (GSH/GSSG), glutathione reductase (GR), glutathione- s-transferase (GST), thioredoxin (Trx), thioredoxin reductase (TrxR) and peroxidoxins (Prxs I and III) were determined.</p> <p>Results</p> <p>Reduced glutathione, total glutathione, GSH/GSSG and activity levels of GST were significantly lower, GR shows non-significant differences, while, Trx, TrxR and both Prx I and III recorded a remarkably higher values in autistics compared to control subjects.</p> <p>Conclusion</p> <p>The impaired glutathione status together with the elevated Trx and TrxR and the remarkable over expression of both Prx I and Prx III, could be used as diagnostic biomarkers of autism.</p
Physiotherapy-supervised mobilization and exercise following cardiac surgery: a national questionnaire survey in Sweden
BACKGROUND: Limited published data are available on how patients are mobilized and exercised during the postoperative hospital stay following cardiac surgery. The aim of this survey was to determine current practice of physiotherapy-supervised mobilization and exercise following cardiac surgery in Sweden. METHODS: A prospective survey was carried out among physiotherapists treating adult cardiac surgery patients. A total population sample was identified and postal questionnaires were sent to the 33 physiotherapists currently working at the departments of thoracic surgery in Sweden. In total, 29 physiotherapists (response rate 88%) from eight hospitals completed the survey. RESULTS: The majority (90%) of the physiotherapists offered preoperative information. The main rationale of physiotherapy treatment after cardiac surgery was to prevent and treat postoperative complications, improve pulmonary function and promote physical activity. In general, one to three treatment sessions were given by a physiotherapist on postoperative day 1 and one to two treatment sessions were given during postoperative days 2 and 3. During weekends, physiotherapy was given to a lesser degree (59% on Saturdays and 31% on Sundays to patients on postoperative day 1). No physiotherapy treatment was given in the evenings. The routine use of early mobilization and shoulder range of motion exercises was common during the first postoperative days, but the choice of exercises and duration of treatment varied. Patients were reminded to adhere to sternal precautions. There were great variations of instructions to the patients concerning weight bearing and exercises involving the sternotomy. All respondents considered physiotherapy necessary after cardiac surgery, but only half of them considered the physiotherapy treatment offered as optimal. CONCLUSIONS: The results of this survey show that there are small variations in physiotherapy-supervised mobilization and exercise following cardiac surgery in Sweden. However, the frequency and duration of exercises and recommendations for sternal precautions reinforced for the healing period differ between physiotherapists. This survey provides an initial insight into physiotherapy management in Sweden. Comparison with surveys in other countries is warranted to improve the physiotherapy management and postoperative recovery of the cardiac surgery patient.</p
Tuberculosis in Sudan: a study of Mycobacterium tuberculosis strain genotype and susceptibility to anti-tuberculosis drugs
BACKGROUND: Sudan is a large country with a diverse population and history of civil conflict. Poverty levels are high with a gross national income per capita of less than two thousand dollars. The country has a high burden of tuberculosis (TB) with an estimated 50,000 incident cases during 2009, when the estimated prevalence was 209 cases per 100,000 of the population. Few studies have been undertaken on TB in Sudan and the prevalence of drug resistant disease is not known. METHODS: In this study Mycobacterium tuberculosis isolates from 235 patients attending three treatment centers in Sudan were screened for susceptibility to isoniazid, rifampicin, ethambutol and streptomycin by the proportion method on Lowenstein Jensen media. 232 isolates were also genotyped by spoligotyping. Demographic details of patients were recorded using a structured questionnaire. Statistical analyses were conducted to examine the associations between drug resistance with risk ratios computed for a set of risk factors (gender, age, case status--new or relapse, geographic origin of the patient, spoligotype, number of people per room, marital status and type of housing). RESULTS: Multi drug-resistant tuberculosis (MDR-TB), being resistance to at least rifampicin and isoniazid, was found in 5% (95% CI: 2,8) of new cases and 24% (95% CI: 14,34) of previously treated patients. Drug resistance was associated with previous treatment with risk ratios of 3.51 (95% CI: 2.69-4.60; p < 0.001) for resistance to any drug and 5.23 (95% CI: 2.30-11.90; p < 0.001) for MDR-TB. Resistance was also associated with the geographic region of origin of the patient, being most frequently observed in patients from the Northern region and least in the Eastern region with risk ratios of 7.43 (95%CI:3.42,16.18; p: < 0.001) and 14.09 (95%CI:1.80,110.53; p:0.026) for resistance to any drug and MDR-TB. The major genotype observed was of the Central Asia spoligotype family (CAS1_Delhi), representing 49% of the 232 isolates examined. CONCLUSIONS: We conclude that emergence of drug resistant tuberculosis has the potential to be a serious public health problem in Sudan and that strengthened tuberculosis control and improved monitoring of therapy is needed. Further surveillance is required to fully ascertain the extent of the problem
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