Publications by authors named "Hal J"

Dietary change can be a strong evolutionary force and lead to rapid adaptation in organisms. High-fat and high-sugar diets can challenge key metabolic pathways, negatively affecting other life history traits and inducing pathologies such as obesity and diabetes. In this study, we use experimental evolution to investigate the plastic and evolutionary responses to nutritionally unbalanced diets.

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Dead wood quantity and quality is important for forest biodiversity, by determining wood-inhabiting fungal assemblages. We therefore evaluated how fungal communities were regulated by stem traits and compartments (i.e.

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Cardiac rehabilitation (CR) has evolved as an important part of the treatment of patients with cardiovascular disease. However, to date, its full potential is fairly underutilised. This review discusses new developments in CR aimed at improving participation rates and long-term effectiveness in the general cardiac population.

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Multidisciplinary cardiac rehabilitation (CR) reduces morbidity and mortality and increases quality of life in cardiac patients. However, CR utilisation rates are low, and targets for secondary prevention of cardiovascular disease are not met in the majority of patients, indicating that secondary prevention programmes such as CR leave room for improvement. Cardiac telerehabilitation (CTR) may resolve several barriers that impede CR utilisation and sustainability of its effects.

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Suboptimal environmental conditions are ubiquitous in nature and commonly drive the outcome of biological interactions in community processes. Despite the importance of biological interactions for community processes, knowledge on how species interactions are affected by a limiting resource, for example, low food availability, remains limited. Here, we tested whether variation in food supply causes nonadditive consumption patterns, using the macroinvertebrate community of intertidal sandy beaches as a model system.

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Climate warming increases nitrogen (N) mineralization in superficial soil layers (the dominant rooting zone) of subarctic peatlands. Thawing and subsequent mineralization of permafrost increases plant-available N around the thaw-front. Because plant production in these peatlands is N-limited, such changes may substantially affect net primary production and species composition.

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Article Synopsis
  • The growing global population necessitates more animal protein production, and seaweed is emerging as a potential protein source for animal feed.
  • A biorefinery approach was developed that processes green seaweed to extract protein and sugars, yielding a protein-rich fraction suitable for monogastric animals, showing better digestibility than whole biomass.
  • The extracted sugars can be fermented to produce valuable chemicals like acetone and ethanol, indicating the multifunctional potential of seaweed in sustainable production systems.
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Background: Unhealthy diets and inactivity are still common among patients with cardiovascular diseases. This study evaluates the effects of the telephonic lifestyle intervention 'Hartcoach' on risk factors and self-management in patients with recent coronary events.

Design: This was a randomised trial in five Dutch hospitals.

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Nutrient resorption from senescing photosynthetic organs is a powerful mechanism for conserving nitrogen (N) and phosphorus (P) in infertile environments. Evolution has resulted in enhanced differentiation of conducting tissues to facilitate transport of photosynthate to other plant parts, ultimately leading to phloem. Such tissues may also serve to translocate N and P to other plant parts upon their senescence.

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The unique chemical composition of seaweeds and their fast growth rates offer many opportunities for biorefining. In this article we argue that cascading biorefinery valorization concepts are viable alternatives to only using seaweeds as carbohydrate sources for the fermentative production of biofuels. However, many challenges remain with respect to use of seaweeds for chemical production, such as the large seasonal variation in the chemical composition of seaweeds.

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Article Synopsis
  • Changes in precipitation due to global climate change are expected to impact vegetation at high latitude sites.
  • The study examined how increased summer precipitation affected two tundra types: Siberian shrub tundra and a Swedish bog over three years.
  • While the Siberian site showed positive growth responses in certain plants with increased precipitation, overall biomass production did not increase at either site, indicating limited short- to medium-term effects on total tundra plant productivity.
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Article Synopsis
  • Dead wood plays a critical role in carbon storage and provides habitats for various organisms as it decays, necessitating a better understanding of the factors influencing wood decomposition.
  • The LOGLIFE experiment aims to explore how different wood traits and environmental conditions affect the decomposition process and the related diversity of microbial and invertebrate communities.
  • Conducted in two contrasting forest sites in the Netherlands, LOGLIFE will collaborate with other researchers to improve forest management practices for enhanced carbon sequestration and biodiversity conservation.
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Beak and feather disease virus (BFDV) infections are often fatal to both captive and wild parrot populations. Its recent discovery in a wild population of native red-fronted parakeets has raised concerns for the conservation of native parrots, all of which are threatened or endangered. The question of a recent introduction versus a native genotype of the virus poses different conservation-management challenges, and thus, a clear understanding of the molecular phylogeny of BDFV is a crucial step towards integrated management planning.

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Plant heat shock protein Hsp70 is the major target of HopI1, a virulence effector of pathogenic Pseudomonas syringae. Hsp70 is essential for the virulence function of HopI1. HopI1 directly binds Hsp70 through its C-terminal J domain and stimulates Hsp70 ATP hydrolysis activity in vitro.

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In ecology, strategy schemes based on propositions about the selection of plant attributes are common, but quantification of such schemes in relation to nutrient and water supply is lacking. Through structural equation modeling, we tested whether plant strategies related to nutrient and water/oxygen supply are reflected in a coordination of traits in natural communities. Structural equation models, based on accepted ecological concepts, were tested with measured plant traits of 105 different species across 50 sites in mesic to wet plant communities in the Netherlands.

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The loss of biodiversity can have significant impacts on ecosystem functioning, but the mechanisms involved lack empirical confirmation. Using soil microcosms, we show experimentally that functional dissimilarity among detritivorous species, not species number, drives community compositional effects on leaf litter mass loss and soil respiration, two key soil ecosystem processes. These experiments confirm theoretical predictions that biodiversity effects on ecosystem functioning can be predicted by the degree of functional differences among species.

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A (205)Tl NMR study to probe the solution structure and dynamics of a series of thallium-containing metal complexes has been conducted. The following compounds were examined: Tl{Co(CO)(4)}(3) (Ia), [BnMe(3)N](3)[Tl{Fe(CO)(4)}(3)] ([BnMe(3)N](3)[Ib]), Tl{M(CO)(3)Cp}(3) (Ic, M = Cr; Id, M = Mo; Ie, M = W), TlFp(3) (If; Fp = CpFe(CO)(2)), [PPN](2)[Tl(2)Fe(6)(CO)(24)] ([PPN](2)[II]), [Et(4)N](2)[Tl(2)Fe(4)(CO)(16)] ([Et(4)N](2)[III]), [Et(4)N][L(2)Tl{Fe(CO)(4)}(2)] ([Et(4)N][IV]: [IVa](-), L(2) = bipy; [IVb](-), L(2) = en; [IVc](-), L(2) = phen; [IVd](-), L(2) = tmeda; [IVe](-), L(2) = dien), [Et(4)N](4)[Tl(4)Fe(8)(CO)(30)] ([Et(4)N](4)[V]), and TlCo(CO)(4) (VI). The (205)Tl NMR technique was used to probe the dynamic behavior of the Tl-metal cluster complexes [II](2-), [III](2-), and [V](4-) in solution and the formation of Lewis base adducts of [III](-), as well as the possibility of formation of carbonylate anion adducts of Ia, Ic, Id, and If.

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The present study was designed to evaluate the myocardial protective effect of nicardipine (NIC) in patients with normal left ventricular (LV) function (control vs. NIC treatment group) and impaired LV function (control vs. NIC treatment group) during extracorporeal circulation for coronary artery surgery.

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The Escherichia coli Fis protein binds to specific DNA sequences whose base composition varies enormously. One known function of Fis is to stimulate site-specific DNA recombination. We used the Gin-mediated DNA inversion system of bacteriophage Mu to analyze Fis-DNA interaction.

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An assay has been developed to determine the anti-ischaemic drug bepridil (as its free base) in human plasma. The assay procedure comprises n-hexane extraction from basic plasma and gas chromatography using nitrogen-selective detection. An analogue of bepridil is used as internal standard.

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