Publications by authors named "Mary Boyce"

Background: Higher cruciferous vegetable intake is associated with lower cardiovascular disease risk in observational studies. The pathways involved remain uncertain. We aimed to determine whether cruciferous vegetable intake (active) lowers 24-h brachial systolic blood pressure (SBP; primary outcome) compared to root and squash vegetables (control) in Australian adults with mildly elevated BP (SBP 120-160 mmHg inclusive).

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Sulfur containing compounds including glucosinolates (GLS), sulforaphane (SFN) and S-methyl-l-cysteine sulfoxide (SMCSO) have been proposed to be partly responsible for the beneficial health effects of cruciferous vegetables. As such, greater understanding of their measurements within foods is important to estimate intake in humans and to inform dietary intervention studies. Herein is described a simple and sensitive method for simultaneous analysis of 20 GLS, SFN and SMCSO by liquid chromatography mass spectrometry.

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Honey bee nutritional health depends on nectar and pollen, which provide the main source of carbohydrates, proteins and lipids to individual bees. During malnutrition, insect metabolism accesses fat body reserves. However, this process in bees and its repercussions at the colony level are poorly understood.

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  • Fires in forested areas can increase water contamination through fire-derived dissolved organic matter (DOM), which affects drinking water quality and management under changing climate conditions.
  • The study emphasizes that the intensity, severity, and frequency of fires alter the composition and reactivity of DOM in water, suggesting that traditional methods of assessing DOM may not adequately capture the complexities introduced by fire events.
  • Post-fire DOM properties vary significantly, with more frequent fires leading to less bioavailable and more aromatic compounds, and the recovery of water quality to its pre-fire state is inconsistent and lacks clear timeframes.
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Short-chain fatty acids (SCFAs) are increasingly being monitored to elucidate the link between gut health and disease. These metabolites are routinely measured in faeces, but their determination in serum is more challenging due to their low concentrations. A method for the determination of eight SCFAs in serum is described here.

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Measuring bile acids in feces has an important role in disease prevention, diagnosis, treatment, and can be considered a measure of health status. Therefore, the primary aim was to develop a sensitive, robust, and high throughput liquid chromatography tandem mass spectrometry method with minimal sample preparation for quantitative determination of bile acids in human feces applicable to large cohorts. Due to the chemical diversity of bile acids, their wide concentration range in feces, and the complexity of feces itself, developing a sensitive and selective analytical method for bile acids is challenging.

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Captive breeding is a vital tool in the conservation of highly endangered species, as it is for the Margaret River hairy marron, , from the south west of Australia. A close relative, , has almost completely displaced in the wild and is a successful aquaculture species, whereas has performed poorly in captivity. We used untargeted liquid chromatography-mass spectrometry to obtain metabolomic profiles of female and male held in controlled aquarium conditions during their reproductive period.

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  • Advances in gut microbiome research highlight the need for reliable methods to analyze fecal bile acids as biomarkers for diet-related diseases.
  • A simple extraction method developed allows for efficient analysis using liquid chromatography and tandem mass spectrometry, yielding high precision and accuracy.
  • The method was tested on 100 human fecal samples, revealing optimum results in bile acid recovery and necessitating specific handling conditions for accurate measurements.
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  • Post-traumatic osteoarthritis (PTOA) significantly affects equine athletes, with the synovium playing a crucial role in its onset and progression, and understanding gene expression changes is key for early diagnosis and treatment.
  • A study analyzed gene expression in the synovium of 11 adult horses, comparing samples from before and after surgical induction of osteoarthritis, which revealed substantial changes in gene expression related to joint disease.
  • Results indicated 397 genes were upregulated and 365 downregulated in OA-affected joints, with notable involvement in extracellular matrix organization and several enriched biological pathways related to joint health.
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Introduction: Apples, an important contributor to total dietary phenolic intake, are associated with cardiovascular health benefits. Determining the phenolic composition of apples, their individual variation across varieties, and the phenolic compounds present in plasma after apple consumption is integral to understanding the effects of apple phenolics on cardiovascular health.

Methods: Using liquid chromatography we quantified five important polyphenols and one phenolic acid with potential health benefits: quercetin glycosides, (-)-epicatechin, procyanidin B2, phloridzin, anthocyanins, and chlorogenic acid, in the skin and flesh of 19 apple varieties and 72 breeding selections from the Australian National Apple Breeding program.

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Background: Australia, like other nations, has experienced a shift in dietary patterns away from home cooking of nutritious foods, towards a reliance on pre-prepared convenience meals. These are typically energy-dense, nutrient-poor and contribute to the rising prevalence of obesity and chronic disease burden. The aims of this study were to evaluate whether a community-based cooking program instigated a change to participants' skills, attitudes, knowledge, enjoyment and satisfaction of cooking and cooking confidence (self-efficacy).

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Background: A diet rich in fruits and vegetables is recommended for cardiovascular health. However, the majority of Australians do not consume the recommended number of vegetable servings each day. Furthermore, intakes of vegetables considered to have the greatest cardiovascular benefit are often very low.

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The consortium of trillions of microorganisms that live inside the human gut are integral to health. Little has been done to collate and characterize the microbiome of children. A systematic review was undertaken to address this gap (PROSPERO ID: CRD42018109599).

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A diet rich in polyphenolic compounds has recognized health benefits, and as such is routinely monitored as part of dietary intervention studies. A method for the simultaneous determination of 36 phenolic compounds, including phenolic acids and flavonoids, using liquid chromatography and tandem mass spectrometry is described here. The target analytes were quantified based on their specific mass spectral fragments using a selected reaction monitoring approach.

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  • The Paleolithic diet (PD) is popular for gut health benefits, but there’s limited evidence supporting its claims, focusing mostly on body measurements and heart health.
  • A study compared long-term PD followers (both strict and pseudo) with individuals on a standard diet, examining their dietary intake, gut health markers, and levels of TMAO, a metabolite linked to cardiovascular disease.
  • Findings showed PD participants had lower resistant starch intake and distinct gut microbiota profiles, with increased TMAO levels, suggesting that a range of fiber sources, including whole grains, is important for optimal gut health.
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The human microbiome includes trillions of bacteria, many of which play a vital role in host physiology. Numerous studies have now detected bacterial DNA in first-pass meconium and amniotic fluid samples, suggesting that the human microbiome may commence . However, these data have remained contentious due to underlying contamination issues.

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Polycystic kidney disease (PKD) encompasses a spectrum of inherited disorders that lead to end-stage renal disease (ESRD). There is no cure for PKD and current treatment options are limited to renal replacement therapy and transplantation. A better understanding of the pathobiology of PKD is needed for the development of new, less invasive treatments.

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  • Researchers are studying branched chain amino acids and trimethylamine-N-oxide as potential indicators of diabetes and cardiovascular health, respectively.
  • A rapid liquid chromatography and tandem mass spectrometry method was developed, utilizing a C18-PFP column for effective separation, allowing for quick analysis in just 4 minutes.
  • The method showed high precision and accuracy, with minimal sample preparation, and was successfully tested on human plasma samples.
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Joseph John Thomson discovered and proved the existence of electrons through a series of experiments. His work earned him a Nobel Prize in 1906 and initiated the era of mass spectrometry (MS). In the intervening time, other researchers have also been awarded the Nobel Prize for significant advances in MS technology.

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The Paleolithic diet excludes two major sources of fibre, grains and legumes. However, it is not known whether this results in changes to resistant starch (RS) consumption. Serum trimethylamine-N-oxide (TMAO) is produced mainly from colonic fermentation and hepatic conversion of animal protein and is implicated in CVD, but changes in RS intake may alter concentrations.

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Globally, marine species' distributions are being modified due to rising ocean temperatures. Increasing evidence suggests a circum-global pattern of poleward extensions in the distributions of many tropical herbivorous species, including the ecologically important rabbitfish . Adaptability of a species to such new environments may be heavily influenced by the composition of their gastrointestinal microbe fauna, which is fundamentally important to animal health.

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Instability-induced pattern transformations of the architectured multi-phase soft metamaterial under bi-axial compression were explored. The soft metamaterial is composed of two phases: a soft matrix and a reinforcing hexagonal network embedded in the matrix. Equi-biaxial loading is found to induce both micro- and macro- instabilities in the networked architecture.

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Although complex in nature, a number of metabolites have been implicated in the onset of exercise-induced fatigue. The purpose of this study was to identify changes in the plasma metabolome and specifically, to identify candidate metabolites associated with the onset of fatigue during prolonged cycling. Eighteen healthy and recreationally active men (mean ± SD; age: 24.

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Irregular interdigitated morphology is prevalent in biological sutures in nature. Suture complexity index has long been recognized as the most important morphological parameter to govern the mechanical properties of biological sutures. However, the suture complexity index alone does not reflect all aspects of suture morphology.

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Three species of macroalgae (Ecklonia radiata, Sargassum linearifolium, and Laurencia brongniartii) were subjected to future climate change conditions, tested directly for changes in their physiology and chemical ecology, and used in feeding assays with local herbivores to identify the indirect effects of climatic stressors on subsequent levels of herbivory. Each alga had distinct physical and chemical responses to the changes in environmental conditions. In high temperature conditions, S.

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