High-intensity Interval Research Articles

High-Intensity Gait Training Intervention for Children With Cerebral Palsy: A Case Series.

The purpose of this pilot case series was to describe participation in high-intensity gait training (HIGT) and changes in (1) gait speed/endurance, (2) aerobic capacity, and (3) walking ability in children diagnosed with cerebral palsy (CP). Three children with CP participated in HIGT for 5weeks in lieu of their routine physical therapy. Outcome measures were collected at baseline and post-intervention. Post-intervention, all had at or above the minimal clinically important difference for 10-m walk test speed and 6-minute walk test distance. Two participants performed above the minimal clinically important difference in 7.5-m shuttle run test level and Gross Motor Function Measure-88 Dimension E score. This case series demonstrates short-term improvements in the walking outcome measures with participation in HIGT. Further research is needed with a larger and more diverse randomized controlled trial to determine parameters and long-term effects of HIGT in this population.

Effectiveness of a school-based high-intensity interval training intervention in adolescents: study protocol of the PRO-HIIT cluster randomised controlled trial

IntroductionHigh-intensity interval training (HIIT) is an effective strategy for improving a variety of health and fitness outcomes within school settings. Incorporating HIIT into existing physical activity opportunities appears practically feasible, yet the process evaluation and effectiveness of this strategy needs to be further evaluated. Therefore, a PRO-HIIT intervention will be conducted to evaluate the effectiveness of a 12-week school-based HIIT intervention on cardiorespiratory fitness, physical activity, body composition, muscular strength, bone health, cognitive function, wellbeing and academic performance among 12–13-year-olds.Methods and analysisEight classes of year 7 students (12–13-year-olds) from a secondary school in Ningbo, China, will be recruited and randomly allocated into an intervention or control group. While the control group maintains their usual activities, a 6 to 10 min HIIT session will be embedded in the physical education or physical activity lessons five days a week for 12 weeks for the intervention group. Training workshops will be conducted for participants, teachers, and research staff for facilitating the intervention. Outcome data will be collected at three time points: pre- and post-intervention, and two months (summer holiday) upon completion of the intervention. Linear mixed models will be used to analyse the impact of groups (intervention and control), timepoints (pre-, post- and two-month after intervention) and group by time interactions. The implementation process of the intervention will be evaluated using a process evaluation framework.Ethics and disseminationEthics approval is obtained from the Ningbo University Ethics Committee (TY2024002). Results from PRO-HIIT study will be disseminated via peer-reviewed journals, scientific conferences as well as local education system. The study protocol has been retrospectively registered on ClinicalTrials.gov Protocol Registration and Results System (NCT06374732), https://clinicaltrials.gov/study/NCT06374732.

Efficacy and safety of ambulatory, weekly, high-intensity intravenous diuretic strategy for congestion-refractory heart failure patients: insights from the DEA-HF prospective randomized clinical trial

Abstract Background Congestion and volume overload are strongly associated with low quality of life and pose a significant risk for both rehospitalization and mortality in heart failure (HF) patients. Despite the widespread use of diuretics in HF, the use of weekly, intravenous (IV), high-intensity diuretic treatment has not been prospectively studied in the setting of ambulatory congestion-refractory patients. Purpose To assess the efficacy and safety of weekly high-intensity diuresis regimens in a practical setting of ambulatory day care for chronically congested HF patients. Methods We performed a sub-analysis on data from a prospective, randomized, cross-over controlled study (DEA-HF) originally designed to compare diuresis regimens in the setting of an HF ambulatory daycare unit who had signs of congestion or volume overload despite adherence to guideline-directed medical therapy. Each patient received three different IV diuretic regimens, in one of six randomized sequences: IV furosemide 250mg; IV furosemide 250mg + oral metolazone 5mg; and IV furosemide 250mg + IV acetazolamide 500mg. All regimens given on the same chronological week were pooled, and diuresis efficacy was assessed by measuring excreted urine volume and sodium weight 6 hours post treatment initiation. Additional assessment at one week post each treatment included serum levels of NT-ProBNP, body weight and creatinine as well as congestion score based on the presence of ascites, pleural effusion and pedal edema. Statistical analysis was based on linear mixed models while accounting for the random effect of patient identity. Results A total of 42 patients were recruited. The mean age was 72±9 years, twenty-one subjects (50%) had LVEF ≥ 50%. 74% of patients were NYHA III class. All patients were on contemporary guidelines-directed HF therapy. Analysis of excreted sodium weight and urine volume revealed values of 4202.1±180.1 mg (Mean±SEM) and 1.77±0.07 liter per visit, respectively. No significant differences in efficacy were detected among treatments given in consecutive weeks (P= 0.80 and 0.69 for differences in sodium weight and urine volume, respectively). After 4 weeks, log(NT-ProBNP) was significantly decreased (P=0.044), accompanied by a significant decrease of 2.4±0.62 kg in body weight (P=0.0004) and of 0.92±0.44 points in congestion score (P=0.037). Serum creatinine level was only slightly increased by 0.19±0.04 mg/dl (P=0.0001), demonstrating the overall safety of the high-intensity diuresis strategy. Conclusions In ambulatory, congestion refractory HF patients a strategy based on high-intensity, weekly diuresis therapy was safe and effective for three consecutive weeks. The natriuresis response to the treatments was maintained, NT-ProBNP levels and congestion score were decreased. The strategy may be instrumental for ambulatory HF patients that require diuretic therapy intensification and may allow to prevent hospitalization.

Impact of High-Intensity Statin on Atrial Fibrillation After Off-Pump Coronary Artery Bypass.

There is uncertainty regarding the impact of high-intensity statins on postoperative outcomes in patients undergoing surgical myocardial revascularization. This study was conducted to evaluate the impact of high-intensity statin treatment on the occurrence rate of new-onset postoperative atrial fibrillation (POAF) after off-pump coronary artery bypass grafting (OPCAB). Six hundred thirteen patients (66.8±9.8 years, male:female = 476:137) who underwent isolated OPCAB were retrospectively enrolled. Hypertension (n = 409, 66.7%), diabetes mellitus (n = 343, 59.6%) and chronic kidney disease (n = 138, 22.5%) were common comorbidities. Statins and beta-blockers were administered to all patients until the day of surgery and resumed within 6 hours after surgery. Risk factors associated with POAF were analyzed, including the use of high-intensity statins (atorvastatin 40 mg-80 mg or rosuvastatin 20 mg), as well as baseline characteristics and preoperative risk factors. High-intensity statins were used in 158 patients (25.8%). POAF occurred in 184 patients (30.0%). The use of high-intensity statins was not correlated with preoperative levels of low-density lipoprotein (P = 0.135) or high sensitivity C-reactive protein (P = 0.365). Multivariate logistic regression analysis revealed that the use of high-intensity statins was significantly associated with a reduced occurrence of POAF (P = 0.022, odds ratio [95% confidence interval] = 0.592 [0.378-0.926]). Age, acute coronary syndrome, insulin-dependent diabetes mellitus and chronic kidney disease were also significantly associated with POAF. Preoperative administration of high-intensity statins was associated with a 41% reduction in the occurrence rate of POAF in patients who underwent OPCAB.

Readiness Framework for Behavioral Strategies: Assessing Low-Intensity Approaches Prior to High-Intensity Interventions

Challenging behavior can impact the learning environment and prevent educators and students from demonstrating behavioral and academic success. Schools and districts may implore a framework of tiered systems of support to respond to students struggling behaviorally or academically. These systems provide a decision-making process to aid educators’ use of low-intensity strategies before utilizing high-intensity strategies. This process can help school teams use their time and resources efficiently. This article presents a flowchart outlining guiding questions within a problem-solving process as the first step in remedying behavior of concern. This flowchart can be utilized by schools with an existing tiered framework or can support the decision-making process for schools that do not utilize a tiered system of support. A vignette is also included to demonstrate its practical use in the classroom.

Reducing Learning and Psychosocial Disparities in Latino Children with Cancer: A Randomized Intervention Trial.

We developed a high-intensity parenting intervention (HIP) to help parents support the academic success of childhood cancer survivors (CCSs), who often face post-treatment challenges affecting their school-related functioning. This randomized controlled trial (NCT03178617) evaluated HIP's efficacy compared to lower-intensity, single-session, treatment-as-usual services (LIP) in Latino families. Primary outcomes were parenting efficacy and CCSs' school functioning; secondary outcomes included parenting knowledge and measures of CCSs' academic performance, attention, and functioning outside of school. 106 Latino survivors of childhood leukemia and lymphoblastic lymphoma (aged 6-12 years) and their parents were randomly assigned to HIP (n = 54) or LIP (n = 52). Linear mixed-effects models evaluated group differences across baseline, 6-month (T2), and 12-month (T3) assessments. Parenting efficacy and knowledge improved significantly in the HIP arm, resulting in higher scores vs LIP at T2 and T3 (P ≤ .01). No significant between-group differences were found in child school functioning; however, HIP children showed significantly better social functioning and performance on one measure of attention (CPT-3 commissions) at T3 (P < .05). While HIP adherence challenges were observed, with only 33 (61%) completing the intervention, exploratory analyses suggest that benefits were most evident among those who fully engaged. Satisfaction and perceived benefit were greater for HIP vs LIP at both time points (P < .05). Our results suggest the potential value of parent-directed behavioral interventions like HIP for CCSs and their families. Further studies are needed to address participation barriers and enhance engagement to maximize and sustain benefits.

High vs. Low Intensity Behavior Therapy Delivered to Adolescents with ADHD: Potential Adverse Long-Term Effects on Substance Use Outcomes.

Individuals with ADHD are at risk for substance use initiation in adolescence and escalation to problematic use in adulthood. Little is known about the impact of psychosocial ADHD treatment on substance use. Based on existing theory, both therapeutic (i.e., through reducing symptoms and impairments) and iatrogenic effects (i.e., through improved social functioning) of psychosocial treatment for ADHD on adolescent substance use initiation are plausible. A primarily ethnic/racial minority sample (~ 95% Latinx or Black) of rising ninth grade students with ADHD (n = 106) were randomly assigned to receive high intensity (i.e., Summer Treatment Program-Adolescent, parent training, and school consultation) or lower intensity (parent training, organization skills training, and school consultation) intervention the summer before entering high school. Participants were followed four-years post-baseline and substance use was documented. Analyses tested treatment effects on substance use initiation (alcohol and/or marijuana) and mediators of main effects. After controlling for covariates, participants assigned to HI (37.5%) were significantly more likely than LI (18.6%) to initiate substance use by end of high school, indicating an iatrogenic effect of HI treatment. No significant mediators were detected. Post-hoc exploration of moderators suggested that youth with elevated Posttraumatic Stress Disorder (PTSD) symptoms may have experienced a benefit of HI treatment on substance use whereas youth without elevated PTSD symptoms experienced iatrogenic effects. Large, well-powered, samples should examine moderated mediational models to better understand who is most risk for iatrogenic effects of ADHD psychosocial treatment and why. Clinicians delivering psychosocial treatment to adolescents with ADHD should monitor for potential iatrogenic effects.

Delivery room resuscitation and short-term outcomes in very preterm infants: a multicenter cross-sectional study in China.

To explore the risk factors of delivery room (DR) resuscitation and assess the association of DR resuscitation with neonatal outcomes in very preterm infants (VPIs). A multicenter retrospective cross-sectional study included VPIs with gestational age (GA) <32 weeks born between January, 2022 and June, 2023 and admitted to neonatal intensive care units of six tertiary hospitals in Shenzhen within 24 h after birth. They were divided into routine care group, positive-pressure ventilation (PPV) group, and endotracheal intubation (ETT) group based on the highest intensity of resuscitation received at birth. The association of antepartum and intrapartum risk factors and short-term outcomes with the intensity of DR resuscitation was evaluated. Of 683 infants included in this study, 170 (24.9%) received routine care, 260 (38.1%) received bag and mask ventilation or T-piece ventilation and 253 (37%) received ETT. Among the antepartum and intrapartum factors, exposure to antenatal steroids (ANS) decreased the likelihood of ETT. Increasing GA decreased the likelihood of receiving a higher level of DR resuscitation. Among the neonatal outcomes, increasing intensity of DR resuscitation was associated with a raise in the risk of Bronchopulmonary dysplasia. Higher levels of DR resuscitation were associated with the risk of early-onset sepsis. ETT was significantly associated with an increased risk of death. Among VPIs, low GA and no ANS use increased the risk of high-intensity DR resuscitation interventions; and those who receiving ETT were associated with an increased risk of adverse clinical outcomes.

Impact Of High-intensity Exercise Interventions On Internet Addiction Among College Students

Impact Of High-intensity Exercise Interventions On Internet Addiction Among College Students

Treatment intensity, age and outcome in mechanical ventilated very old patients admitted to Intensive Care Unit.

The global population is aging, and the proportion of elderly patients admitted to Intensive Care Units (ICUs) is increasing. In this scenario, achieving a balance between judicious utilization of a limited and high-cost resource and providing optimal intensity of care presents a challenge, given that in very elderly patients, the value of ICU care is uncertain. The aim of our study is to evaluate the survival of older patients admitted to ICU who require mechanical ventilation (MV) at different levels of treatment intensity. A comprehensive longitudinal ICU database was retrospectively analyzed at a single tertiary center, from January 2008 to December 2014, of ICU subjects 80 years old or older who required mechanical ventilation. From January 2009 to December 2014, 482 subjects were admitted to the ICU and required mechanical ventilation. Among them, 376 (78%) were aged between 80 to 89 years, and 106 (22%) were aged 90 years or older, with a mean age of 85.84 (4.56). The mean APACHE II score was 21.53 (7.42), and the mean SOFA score was 5.75 (3.38). The total mortality during ICU admission was 46%, and the hospital mortality was 58%. Only age higher than 90 years (1.41(1.05;1.91), P = .02) and APACHE score (1.03(1.01;1.05), P < .001) were associated with mortality after adjustments. The TISS score was analyzed in tertiles and was not related to mortality in univariate analysis or after adjustments. Our data indicate that in older subjects using MV, higher intensity of treatment does not seem to translate into a survival benefit. This finding highlights the importance of considering individualized treatment plans for elderly patients in the ICU.

High-Intensity Exercise Training Impact on Cardiorespiratory Fitness, Gait Ability, and Balance in Stroke Survivors: A Systematic Review and Meta-Analysis.

Stroke survivors commonly face challenges such as reduced physical activity and cardiorespiratory fitness (CRF) as well as balance and gait impairments, exacerbating their disability. While high-intensity exercise interventions have demonstrated some potential, their effects on these items remain uncertain. Therefore, our study aimed to investigate the impact of high-intensity training protocols on CRF, gait ability, and balance in stroke survivor populations. Two independent investigators systematically searched five databases for relevant RCTs following the PICO model. Through a systematic review of 25 RCTs published up to 31 May 2023, including adult first-stroke survivors, comparing high-intensity exercise training versus low-to-mild or no exercises, we evaluated outcomes such as the Six-Minute Walking Test (6 MWT), peak oxygen uptake (VO2peak), Ten-Meter Walk Test (10 MWT), Berg Balance Scale (BBS), and Timed Up and Go test (TUG). The protocol was registered in PROSPERO (registration number CRD42023456773). Meta-analyses indicated significant enhancements in CRF, as measured by 6 MWT and VO2peak, following high-intensity exercise interventions. However, no significant differences were observed in BBS, 10 MWT, and TUG. Our findings underscore the potential of high-intensity exercise interventions in ameliorating CRF among stroke survivors, although further research involving standardized protocols and long-term follow-ups is imperative to optimize rehabilitation outcomes.

Insights on prevalence and incidence of anemia and rapid up-titration of oral heart failure treatment from the STRONG-HF study.

Anemia is one of the most frequent comorbidities in patients with heart failure (HF), which potentially can interfere with the effect of guideline-recommended HF medical therapy and can be associated with the use of neurohormonal blockers. The aim of this analysis was to determine the prevalence and changes of anemia status in the STRONG-HF study, its association with clinical endpoints, and possible interaction of the presence of anemia with the efficacy and safety of high-intensity HF treatment. The design and main results of the study have been previously described. Patients were randomized within 2days prior to anticipated hospital discharge after HF worsening in a 1:1 fashion to either high-intensity care (HIC) or usual care (UC). Baseline characteristics, clinical and safety outcomes, and treatment effect of HIC vs. UC on the primary and secondary outcomes were compared in groups based on baseline anemia. In addition, dynamics of hemoglobin during the study follow-up and predictors of incident anemia at 90days were investigated. The proportion of anemia in 1077 STRONG-HF patients at enrollment was 27.2%, while at 90days, it changed to 32.1%. The primary composite outcome occurred in 18.2% of patients without baseline anemia, and 22.5% of patients with baseline anemia (unadjusted HR 1.27; 95% CI 0.90-1.80), a difference that did not reach statistical significance. However, patients with baseline anemia had significantly less improvement of EQ-VAS questionnaire values from baseline to day 90 (adjusted LS-Mean difference -2.34 (-4.37, -0.31), P = 0.02). During the study, anemia developed in 19.4 and 14.6% in HIC and UC groups, respectively. The opposite phenomenon-recovery of anemia-occurred in 27.6 and 28.8% in HIC and UC groups (P = 0.1379). The predictors of incident anemia at 90days were male sex, geographical region other than Europe, ischemic etiology, higher glucose, and elevated uric acid at baseline. The percentages of optimal doses of renin-angiotensin system inhibitors, beta-blockers, and mineralocorticoid receptor antagonists were not different between anemic and non-anemic patients. High-intensity care strategy did not increase rate of incident anemia at 90days and reduced the rate of primary and secondary endpoints regardless of baseline hemoglobin. Hemoglobin level and status of anemia have a dynamic nature in the acute HF patients in the post-discharge period dependent on multiple factors. High-intensity HF treatment is safe and beneficial regardless of baseline hemoglobin level and presence of anemia. The improvement of quality of life is significantly lower in anemic HF patients implying specific attention to correction of this condition.

Impact of a 12-week high-intensity interval training intervention on cardiac structure and function after COVID-19 at 12-month follow-up.

In patients previously hospitalised for COVID-19, a 12-week high-intensity interval training (HIIT) intervention has previously been shown to increase left ventricular mass (LVM) immediately after the intervention. In the present study, we examined the effects of the same HIIT scheme on LVM, pulmonary diffusing capacity, symptom severity and functional capacity at 12-month follow-up. In this investigator-blinded, randomised controlled trial, 12weeks of a supervised HIIT scheme (4×4min, three times a week) was compared to standard care (control) in patients recently discharged from hospital due to COVID-19. At inclusion and at 12-month follow-up, LVM was assessed by cardiac magnetic resonance imaging (cMRI, primary outcome), while pulmonary diffusing capacity for carbon monoxide (DLCOc, secondary outcome) was examined by the single-breath method. Symptom severity and functional status were examined by the Post-COVID-19 Functional Scale (PCFS) and King's Brief Interstitial Lung Disease (KBILD) questionnaire score. Of the 28 patients assessed at baseline, 22 completed cMRI at 12-month follow-up (12.4±0.6months after inclusion). LVM was maintained in the HIIT but not the standard care group, with a mean between-group difference of 9.68 [95% CI: 1.72, 17.64] g (P=0.0182). There was no differences in change from baseline to 12-month follow-up between groups in DLCOc % predicted (-2.45 [-11.25, 6.34]%; P=0.578). PCFS and KBILD improved similarly in the two groups. In individuals previously hospitalised for COVID-19, a 12-week supervised HIIT scheme resulted in a preserved LVM at 12-month follow-up but did not affect pulmonary diffusing capacity or symptom severity.

Ecophysiology of Mediterranean Chestnut (Castanea sativa Mill.) Forests: Effects of Pruning Studied through an Advanced IoT System

Chestnut (Castanea sativa Mill.) forests in the Mediterranean region are facing increasing abandonment due to a combination of factors, ranging from climate change to socioeconomic issues. The recovery of chestnut ecosystems and their preservation and valorization are key to ensuring the supply of the wide spectrum of ecosystem services they provide and to preventing detrimental environmental shifts. The study’s objective was to provide evidence on the effects of different management options on the ecophysiology of chestnut forests, with diverse pruning intensities (low, medium, and high intensity versus no pruning) tested in an abandoned chestnut stand in central Italy with the aim of recovering and rehabilitating it for fruit production. Innovative Internet of Things (IoT) ‘Tree Talker’ devices were installed on single trees to continuously monitor and measure ecophysiological (i.e., water transport, net primary productivity, foliage development) and microclimatic parameters. Results show a reduction in water use in trees subjected to medium- and high-intensity pruning treatments, along with a decrease in the carbon sequestration function. However, interestingly, the results highlight that trees regain their usual sap flow and carbon sink activity at the end of the first post-pruning growing season and fully realign during the following year, as also confirmed by the NDVI values. As such, this paper demonstrates the efficacy of recovering and managing abandoned chestnut forests, and the initial setback in carbon sequestration resulting from pruning is rapidly remedied with the advantage of reviving trees for fruit production. Additionally, the reduced water demand induced by pruning could represent a promising adaptation strategy to climate change, bolstering the resilience of chestnut trees to prolonged and intensified drought periods, which are projected to increase under future climate scenarios, particularly in the Mediterranean region.

Better Care, Same Cost - Reducing Unplanned Care for Multi-visit Patients: A Payer-Provider Model.

Many interventions implemented for multi-visit patients (MVP) have been developed to address patient-centric needs of these individuals and reduce unplanned care for ambulatory-sensitive conditions. More rigorous research is needed to better understand the impact of these interventions on changes in care utilization including unplanned care. To evaluate the impact of the Enhanced Care Program (ECP), a payer-provider collaborative model, on unplanned care use and cost of care. Using propensity methods, a comparison group was constructed using insurer membership files. Comparisons were performed using a difference-in-differences analysis. Patients enrolled in ECP through December 2019 were considered eligible for the study (n = 357). All patients had five or more ED visits in the past year or two or more inpatient hospitalizations in the past year prior to enrollment. ECP is a high-intensity outpatient intervention intended to reduce avoidable unplanned care such as ED visits and inpatient hospital stays through home visits, chronic/acute disease management, and intensive care coordination. The primary outcomes of interest were events per 100 members per year of ED use with return to home, unplanned inpatient and observational status admissions, and unplanned behavioral health inpatient admission, and cost of care per member per month. Overall total unplanned care encounters were significantly reduced with a difference-in-difference of 320 unplanned care encounters per 100 members per year in the intervention group (p < 0.05). The ECP group showed statistically significant decreases in costs of unplanned ED, unplanned observation admission, and unplanned inpatient behavioral medicine costs, but statistically significant increases in overall pharmacy costs and lab costs. Changes in total costs of care for the ECP group were not statistically different than the control group (p = 0.55). ECP showed significant reduction of unplanned care for MVP patients.

Hydrogel foam with designed structural properties of egg white protein through building aggregates as potential dysphagia food

To address the growing demand for texture-modified foods (TMFs) among individuals with dysphagia, the structural properties of alkali-heat treated egg white protein aggregates (AHEWP) were investigated to developed hydrogel foams as suitable soft gels. The results showed that AHEWP presented partially unfolded and higher content of β-sheet structures. The alkaline shift suppressed thermally denatured molecular unfolding (exposing aromatic and hydrophobic amino acids) and blocked hydrogen bonding, leading to the generation of small-sized AHEWP. Within the pH range of 10.5–11.25, raising temperature promoted more covalent bonding to produce structurally compact aggregates. Compared to EWP, AHEWP exhibited remarkably stable foams (85.62–91.99% of FS) and could form Ca2+ crosslinked cold gels, which were contributed to the formation of hydrogel foam. The alkali-heat treatment of high intensity gave a less increase in surface tension and richer interfacial proteins. SEM and microrheology revealed that the alkaline shift transformed the hydrogel network of AHEWP into a “sheet-like” stacking structure, accompanied by a rise in the macroscopic viscosity index and a change of gelation rate. At pH 11.0 and 11.25, the higher temperature, the denser the pore and the lower the elasticity index. The self-supporting property and water loss of AHEWP hydrogel foam reduced, and their time stability enhanced with increasing pH and/or temperature. According to IDDSI, AHEWP hydrogel and hydrogel foam were attributed to level 4–7 and 4–5, respectively. Overall, AHEWP has the potential to establish hydrogel foam systems that will serve as a valuable reference for designing protein-based soft gel TMFs for dysphagia diets.

Modification of pea protein isolates by high-intensity ultrasonication: Functional, structural and nutritional properties

The current study aims to modify the functional, physical, structural and nutritional characteristics of pea protein isolate. High-intensity ultrasound treatment was used at 20 kHz frequency and 25 % amplitude for 10 (US10), 20 (US20), or 30 (US30) min. Results indicated that ultrasound application enhanced the protein solubility and zeta potential. When compared to control samples, the foaming capacity (FC) and stability (FS) as well as emulsion activity (EA) and stability (ES) were also increased from 157.5, 42.03, 46.25 and 53.75 % up to 182.5, 81.57, 72.50 and 67.50 %, respectively. Besides, particle size was found to be lower for ultrasound treated samples (92.9–131.1 nm) in comparison to that of untreated commercial pea protein isolate (161.9 nm). Moreover, while the bioaccessibility of pea protein in untreated sample was calculated as 28.90 %, ultrasonication increased the retention of pea protein up to 49.36 %. It can be concluded from the results that the ultrasonication process can be used as an advantageous, green and non-thermal tool for obtaining protein isolates with improved techno-functional properties and nutritional quality. Therefore, this treatment might improve the characteristics, and thus increase the utilization of plant-based proteins, especially pea protein, in various food systems.

Electric wind induced texturing for enhanced thermoelectric performance of p-type Mg3Sb2-based materials

High-intensity electric pulse treatment (EPT) can induce electric wind effect in materials, which facilitates the grain rearrangement and reorientation in polycrystalline samples. For the first time, this study employed the EPT technique to construct texture in Mg3.04Ag0.02Sb2 bulk compounds, and a highly conductive channel was produced to promote the charge carrier transport. This leads to a 53 % improvement in carrier mobility of the EPT sample (4#20) over the pristine one at room temperature. Additionally, EPT does not affect the carrier concentration of the material, making the EPT samples possess significantly improved electrical conductivities and untouched Seebeck coefficients. Consequently, a 36 % improvement in zT value is achieved for the EPT sample (4#20) at 723 K, compared to the pristine one. This work demonstrates that EPT technique is an effective approach for constructing textured Mg3Sb2-based materials, offering a valuable avenue for high thermoelectric performance in other potential materials via manipulating properties-related texture.

Exploring effects of light intensity on sustainability indicators in finishing pig production

With an ongoing transition towards the use of Light Emitting Diodes, more knowledge is needed on which light settings optimise sustainability parameters in pig production. We studied the effects of four light intensities on social, environmental and economic sustainability indicators, including ammonia emissions, space use, pen fouling, weight gain, carcass quality, perception of the stockkeeper, costs of the light system, and use of drinking water, electricity and medicines. Light treatments included a low (45 lux), medium (198 lux) and high (968 lux) uniform intensity, and a spatial gradient treatment ranging from 71 lux in the front to 330 lux in the back of each pen. The latter treatment aimed to improve the space use of functional areas. A total of 448 growing-finishing pigs were studied on a commercial farm using two consecutive batches of four rooms containing eight pens with seven pigs. Light intensity influenced some aspects of space use and pen fouling. For example, the proportion of pigs lying in the resting area was higher in the high and medium light intensity treatment than in the low intensity and gradient treatment. Moreover, the high-intensity treatment resulted in more fouling with faeces in the feeding area compared with the low-intensity and the gradient treatment. Ammonia emissions were higher in the gradient than in the low intensity treatment (not measured in medium and high intensity treatment). Furthermore, light intensity did not affect weight gain, carcass quality, water use and medicine use. The stockkeeper was content to work in all light conditions, but slightly preferred the medium intensity due to optimal visibility. Concerning economic performance, the costs of the light system and electricity use increased in the following order: low intensity, gradient, medium intensity, and high intensity. In conclusion, contrary to expectation the spatial gradient did not notably improve space use or reduce pen fouling, but rather increased ammonia emissions in comparison with uniform light. This is likely because the gradient could not be applied in an optimal way in the existing housing conditions. Among the other sustainability indicators, mainly electricity use and costs of the light system differed per treatment. These aspects can be improved by further optimising the number of light sources needed per pen to achieve the targeted intensities.

Safety assurance and nutritional quality enhancement of Phyllospora comosa biomass using hydrothermal treatment derived ensemble machine learning models

One of the major barriers to the mass industrial utilisation of brown seaweeds as food sources stem from the food safety risks associated with their iodine and arsenic concentrations, which typically exceed regulatory limits. Hydrothermal treatments might effectively reduce the high iodine and arsenic concentration of Phyllospora comosa below the Australian maximum residual limits (iodine = 1 mg/g and arsenic = 0.00667 mg/g; dry weight) set for brown seaweeds. The experimental hydrothermal treatments dictated that the 82 °C–250 s treatment reduced the iodine concentration from 2.76 mg/g to 0.88 mg/g (68% reduction) and arsenic concentration from 0.01693 mg/g to 0.00965 mg/g (43% reduction). Machine learning models predicted that blanching at 100 °C for ∼4 minutes will reduce the arsenic concentration below its maximum residual limit. Additive log-ratio transformations showed that around 50% (dw) of the hydrothermally treated Phyllospora comosa samples were leached out during the highest treatment intensity, 82 °C–250 s. Even though, a half of the biomass is lost, hydrothermally treated Phyllospora comosa products are safer for human consumption and thus may permit the expansion of seaweed production and consumption in Australia.