Search Results (70)

The physiological performance of clonal plants is largely linked with resource translocation among interconnected ramets. Whereas carbon (C) and nitrogen (N) transferences have been evidenced in several herbaceous clonal plants, empirical evidence in woody species is anecdotal. We evaluated physiological integration in two evergreen tree species, differing in the light requirements in a temperate rainforest of Southern Chile: Embothrium coccineum J.R. et. G. Forster (light-demanding) and Eucryphia cordifolia Cav. (shade-tolerant). We measured light availability for vegetative (root suckers) and sexual (seed-origin plants; hereafter, saplings) recruits of the two species. Then, we compared elemental and isotopic leaf traits between recruit types and species growing under similar light availability. A ¹³CO₂ field pulse labeling was performed on a set of Embothrium root suckers to quantify C transfer from moderately shaded suckers (donors) to highly shaded suckers (receivers). For the two species, leaf N concentration, δ¹³C, and δ¹⁵N were higher in suckers compared to saplings. In the labeling experiment, the δ¹³C and ¹²C equivalent excess did not differ between donor and receiver, indicating a weak C transfer between donors and receivers. Although the results from the pulse labeling were not conclusive, they suggest, together with the differences in natural isotope abundance, the existence of physiological integration in root suckers of both species. Our findings indicate that the formation of root suckers is more important for regeneration and persistence than for resource acquisition at an intermediate ecological succession of a temperate rainforest. Full article

Antioxidants are crucial in counteracting the impact of free radicals, thereby preventing cell damage. Extracts from orange, apricot, and olive tree pruning, classified as by-products according to environmental laws, underwent examination of their antioxidant properties. In the present investigation, data on the antioxidant activity of extracts of these tree by-products were used to calculate the relative antioxidant capacity index (RACI). The latter made it possible to identify Apricot bark maceration extract as having the highest antioxidant index. Further analysis through UHPLC-MS enabled the identification of compounds known for their antioxidant activity, including catechin, epicatechin, and others. Cytotoxicity assays conducted on human hepatocellular carcinoma cell lines (HepG2) confirmed the safety of the chosen extract for cosmetic applications. The extract was then used to formulate a cosmetic cream, which subsequently underwent quality control and proved to be stable, of good consistency, and free of pathogens. The results show that developing a sustainable cosmetic cream prototype is a promising step toward realizing an environmentally friendly product in the circular economy context. Full article

The increasing complexity of healthcare needs driven by an ageing population places pressure on district nursing care. Many vulnerable older adults prefer to remain at home, requiring care coordinated with general practitioners and other professionals. This demand for integrated care is further challenged by a shortage of nursing professionals and the lack of standardised approaches to measure care quality. This article identifies the key requirements for implementing a learning healthcare system in district nursing care, using patient outcome data to foster continuous improvement and create a more adaptive, evidence-based, and patient-centred approach. This paper synthesises findings from multiple studies conducted as part of a PhD thesis, utilising a multi-method approach. These methods include examining patient outcomes in district nursing care and evaluating necessary cultural, organisational, and financial changes. Four key requirements were identified: (1) standardising patient outcome measures; (2) fostering a data-driven culture and strengthening professional autonomy; (3) enhancing organisational support and integrated care; and (4) adopting financing models that incentivise continuous learning and quality improvement. Implementing a learning healthcare system with patient outcome data in district nursing care requires a transformative shift. Standardising outcome measures, investing in information systems, and promoting continuous learning are crucial. Aligning financial incentives with patient outcomes, strengthening professional autonomy, and enhancing organisational support can make district nursing more responsive and capable of meeting complex needs. The described requirements are essential for advancing district nursing care through a more adaptive, evidence-based, and patient-centred approach. Full article

The use of medicinal plants in the management of microbial infections is significant to the health of the indigenous people in many Angolan communities. The present study provides a comprehensive overview of medicinal plants used for the management of microbial infections in Angola. Relevant information was extracted from research articles published and associated with the use of medicinal plants in the management of microbial infections in Angola (from January 1976 to November 2023). Data or information were gathered from the literature sourced from Wiley Online, SciFinder, Google Scholar, Web of Science, Scopus, ScienceDirect, BMC, Elsevier, SpringerLink, PubMed, books, journals and published M.Sc. and Ph.D. thesis. A total of 27 plant species, representing 19 families, were recorded in this study. Hypericaceae (11%), Lamiaceae (11%), Malvaceae (11%), Phyllanthaceae (11%), Fabaceae (16%) and Rubiaceae (16%) were the most predominant families. The leaves are the most used parts (96%), followed by bark (74%) and root (70%). The data revealed that medicinal plants continue to play significant roles in the management of microbial infections in Angola. In order to explore the benefits of the therapeutic potential of indigenous medicinal plants for diseases related to infections; further scientific research studies are important to produce data on their effectiveness using appropriate test models. This approach might assist with the continuing drive regarding the integration of Angolan traditional medicine within mainstream healthcare systems. Full article

This article argues for the critical need to value the voices and creative work of contemporary women writers in Australia. Historically, women writing in Australia have endured erasure, dismissal, and suppression. I argue that there is still, in the modern period, a continued lack of awareness, recognition and education on Australian women’s writing despite targeted awards and the achievements of the feminist movement. This piece reflects back across time, drawing on interviews I conducted and PhD thesis research with women writers in Australia at the turn of the twenty-first century, and maps how the legacies of gendered notions of writers impacted women at this pivotal era to consider what this may mean for women writing today. It also explores how feminist theories such as écriture féminine are helpful for framing and understanding the responses of Australian women writers to the shifting notions of sexual difference and agency in writing. This article aims to provide insights into the complexities of liberation for women from the past to modern times, and the impact of gender on creative expression in Australia across changing social periods. Full article

The largest genus of Palaearctic Syrphidae, Cheilosia Meigen, 1822 (Syrphidae: Rhingiini), is currently under revision in the Ibero-Balearic region (Iberian Peninsula + Balearic Islands). Prior to this study, various species groups with putative phylogenetic support were defined for this genus of complex taxonomy. The group of Cheilosia melanura Becker, 1894 includes species distributed all over Europe, with some of these species being similar each other in both morphology and genetics. After recent fieldwork in different Iberian localities and consultation of entomological collections, a new species from Sierra Nevada (Granada, Spain) was uncovered, described, and illustrated. Data on diagnostic characters, intraspecific variability, and adult biology were also provided. Maximum likelihood analyses of the fragment “C” of the 5′ end of the cytochrome c oxydase subunit I (COI-5′) and complete COI-5′ were performed to explore and support morphological species concepts within the group. The Spanish-endemic Cheilosia andalusiaca Torp Pedersen, 1971 is recognised here to be part of the C. melanura group based both on morphological and molecular evidence. Cheilosia carbonaria Egger, 1860 and Cheilosia cynocephala Loew, 1840 from the Iberian Peninsula are reported for the first time based on specimens originating in the Spanish Pyrenees. An identification key for the Iberian species of the C. melanura group is provided. Full article

Hauntings are often misconstrued as strange and often scary supernatural experiences that blur the lines between what is real and what is not. Yet, Indigenous hauntings can not only be confronting, but they can also be comforting and support place belonging. This paper offers a Māori philosophical way of theorising hauntology and its relation to time, space, place, and belonging by privileging a whakapapa perspective. Whakapapa acknowledges not only kinship relations for people, but all things and their relationship to them, from the sky to the lands, and the spiritual connections in between. Employing a whakapapa kōrero theoretical framework, I draw on Māori constructs of time and place through Wā, Wānanga (Māori stories both told and untold), and Te Wāhi Ngaro to offer some insights from my doctoral thesis where Māori PhD students shared their everyday experiences in their institutions. With a backdrop of settler-colonial structures, norms, and daily interactions, I argue that hauntings are an everyday familiar occurrence in Te Ao Māori which play a major role in the way Māori doctoral students establish and maintain a sense of belonging in their universities. Full article

More than half of global water use can be attributed to crop irrigation, and as the human population grows, so will the water requirements of agriculture. Improved irrigation will be critical to mitigating the impact of increased requirements. An ideal irrigation system is informed by measurements of water demand—a combination of water use and water status signals—and delivers water to plants based on this demand. In this review, examples of methods for monitoring water status are reviewed, along with details on stem and trunk water potential measurements. Then, methods for monitoring evapotranspiration (ET), or water use, are described. These methods are broken into coarse- and fine-scale categories, with a 10 m spatial resolution threshold between them. Fourteen crop ET technologies are presented, including examples of a successful estimation of ET in research and field settings, as well as limitations. The focus then shifts to water distribution technologies, with an emphasis on the challenges associated with the development of systems that achieve dynamic single plant resolution. Some attention is given to the process of choosing ET and water status sensing methods as well as water delivery system design given site characteristics and agronomic goals. This review concludes with a short discussion on the future directions of ET research and the importance of translating findings into useful tools for growers. Full article

Dysfunction in ion channels or processes involved in maintaining ionic homeostasis is thought to lower the threshold for cortical spreading depression (CSD), and plays a role in susceptibility to associated neurological disorders, including pathogenesis of a migraine. Rare pathogenic variants in specific ion channels have been implicated in monogenic migraine subtypes. In this study, we further examined the channelopathic nature of a migraine through the analysis of common genetic variants in three selected ion channel or transporter genes: SLC4A4, SLC1A3, and CHRNA4. Using the Agena MassARRAY platform, 28 single-nucleotide polymorphisms (SNPs) across the three candidate genes were genotyped in a case–control cohort comprised of 182 migraine cases and 179 matched controls. Initial results identified significant associations between migraine and rs3776578 (p = 0.04) and rs16903247 (p = 0.05) genotypes within the SLC1A3 gene, which encodes the EAAT1 glutamate transporter. These SNPs were subsequently genotyped in an independent cohort of 258 migraine cases and 290 controls using a high-resolution melt assay, and association testing supported the replication of initial findings—rs3776578 (p = 0.0041) and rs16903247 (p = 0.0127). The polymorphisms are in linkage disequilibrium and localise within a putative intronic enhancer region of SLC1A3. The minor alleles of both SNPs show a protective effect on migraine risk, which may be conferred via influencing the expression of SLC1A3. Full article

Lake sediment records are of great importance for understanding the evolution of watershed environments. Various studies have been carried out to determine the depositional ages of lake sediments and to examine their physical, chemical, and biological characteristics. The aim is to construct the historical vegetation, environment, and climate patterns in Chinese lake watersheds. In this review, we obtained relevant studies on lake sediment records by searching the key word ‘age-depth’ from the following databases: Web of Science and the China National Knowledge Infrastructure (CNKI, the largest Chinese academic database). We analyzed the literature based on its type (published in a Chinese/English journal or as a Master’s/PhD thesis), period of publication, journal (if published in a journal), key authors, study area, dating scale, and main aims. The results suggest that the lakes in the plateau regions are the most popular research topic, typically covering 100–200 years (short-term) and 500–30,000 years (long-term). The literature focuses on a wide range of topics, from past environmental evolution in watersheds to lake ecology, and it provides a solid foundation for a better understanding of the regional climate change and the preservation of lake environments and ecosystems. In the future, the resulting data obtained from environmental reconstructions with lake sediments will need to be integrated with emerging information processing technologies (e.g., artificial intelligence and meta-analysis) to disentangle the complex interplay between the Earth’s surface processes and global climate change; furthermore, strengthening interdisciplinary collaboration will deepen our comprehension of the man-land relationship and promote the sustainable management of lake ecosystems in the context of global climate change. Full article

Background and Aims: Pancreaticoduodenectomy (PD) is a complex and high-skill demanding procedure often associated with significant morbidity and mortality. However, the results have improved over the past two decades. However, there is a paucity of research concerning the learning curve for PD. Our aim was to report the outcomes of 100 consecutive PDs representing a single surgeon’s learning curve and to depict the factors that influenced the learning process. Methods: We reviewed the first 121 PDs performed at our academic center (2013–2019) by a single surgeon; 110 were PDs (5 laparoscopic and 105 open) and 11 were total PDs (1 laparoscopic and 10 open). Subsequent statistics was performed on the first 100 PDs, with attention paid to the learning curve and survival rate at 5 years. The data were analyzed comparing the first 50 cases (Group 1) to the last 50 cases (Group 2). Results: The most frequent histopathological tumor type was pancreatic ductal adenocarcinoma (50%). A total of 39% of patients had preoperative biliary drainage and 45% presented with positive biliary cultures. The preferred reconstruction technique included pancreaticogastrostomy (99%), in situ hepaticojejunostomy (70%), and precolic gastro-jejunal anastomosis (88%). Postoperative complications included biliary fistula (1%), pancreatic fistula (8%), pancreatic stump bleeding (4%), and delayed gastric emptying (13%). The mean operative time decreased after the first 50 cases (p < 0.001) and blood loss after 60 cases (p = 0.046). R1 resections lowered after 25 cases (p = 0.025). Vascular resections (17%) did not influence the rate of complications (p = 0.8). The survival rate at 5 years for pancreatic adenocarcinoma was 32.93%. Conclusions: Outcomes improve as surgeon experience increases, with proper training being the most important factor for minimizing the impact of the learning curve over the postoperative complications. Analyzing the learning curve from the perspective of a single surgeon is mandatory for accurate statistical results and interpretation. Full article

Co-design of research can evolve organically when the questions to be asked have their roots deep1 in the soil of partnerships based on trust, respect, and a common vision for equity and inclusion. White Questions—Black Answers, a PhD thesis research project focusing on the inclusion of Indigenous students with disability in the Australian Higher Education Sector, demonstrates this premise. Founded on Indigenous Standpoint Theory, the methodology of this research foregrounds the central role of Indigenous people with lived experience of disability—in the study design, its implementation, and in the validation of the results. This paper shares the conceptual framework and relationship hierarchy for the research, ensuring that the authority of those with lived experience was maintained and central to all research activities. It showcases a way forward for other fields of co-designed research, delivering both academic rigour and leadership by those with lived experience. Full article

Aims: This scoping review aimed to explore three research questions: 1. What is the dental care access for children and young people (CYP) in care and care leavers? 2. What factors influence CYP in care and care leavers’ access to dental care? 3. What pathways have been developed to improve access to oral health care for CYP in care and care leavers? Methods: Five databases (Ovid MEDLINE, Ovid Embase, CINAHL, SocINDEX and Dentistry and Oral Sciences Source) and grey literature sources were systematically searched. Articles relating to CYP in care or care leavers aged 0–25 years old, published up to January 2023 were included. Abstracts, posters and publications not in the English language were excluded. The data relating to dental care access were analysed using thematic analysis. Results: The search identified 942 articles, of which 247 were excluded as duplicates. A review of the titles and abstracts yielded 149 studies. Thirty-eight were eligible for inclusion in the review: thirty-three peer-reviewed articles, one PhD thesis and four grey literature sources. All papers were published from very high or medium Human Development Index countries. The studies indicate that despite having higher treatment needs, CYP in care and care leavers experience greater difficulty in accessing dental services than those not care-experienced. Organisational, psycho-social and logistical factors influence their access to dental care. Their experience of dental care may be impacted by adverse childhood events. Pathways to dental care have been developed, but little is known of their impact on access. There are very few studies that include care leavers. The voices of care-experienced CYP are missing from dental access research. Conclusions: care-experienced CYP are disadvantaged in their access to dental care, and there are significant barriers to their treatment needs being met. Full article

Low-temperature stress is an important limiting factor affecting citrus growth and fruit yields. Therefore, increasing citrus cold stress tolerance may enhance the growth, yield, and quality of citrus production in marginal areas. The objective of this study was to determine the efficacy of silicon (Si) fertilizer application on cold-tolerance enhancement in citrus. Two citrus cultivars (Delta and Nules) were subjected to Si fertilization (control, 1000 mg L⁻¹) and cold-stress temperature treatments (control and 0 °C for 72 h) using a 2 × 2 × 2 factorial treatment structure with six replications. Leaf gas exchange and chlorophyll fluorescence parameters, such as net photosynthetic rate (A), stomatal conductance (g_s), transpiration rate (Tr), internal CO₂ concentration (C_i), intrinsic water-use efficiency (iWUE), minimal fluorescence (F_o), maximum fluorescence (F_m), maximum quantum efficiency of PSII primary photochemistry of dark-adapted leaves (F_v/F_m), maximum quantum efficiency of PSII primary photochemistry of dark-/light-adapted leaves (F’_v/F’_m), electron transport rate (ETR), non-photochemical quenching (NPQ), and the relative measure of electron transport to oxygen molecules (ETR/A), were measured. The application of Si drenching to trees that were subsequently exposed to cold stress reduced g_s, Tr, and C_i but improved iWUE and F_o in both cultivars compared to the Si-untreated trees. In addition, specific adaptation mechanisms were found in the two citrus species; NPQ and ETR were improved in Si-treated Valencia trees, while A, F_m, and ETR/A were improved in Clementine trees under chilling stress conditions. The current research findings indicate the potential of Si application to enhance cold stress tolerance in citrus, which can provide a strategy for growing citrus in arid and semi-arid regions that may experience cold stress. Overall, after the application of silicon drenching, the cold-sensitive citrus Valencia cultivar became as cold-tolerant as the cold-tolerant Clementine cultivar. Full article

The effectiveness of an alginate/chitosan nanomultilayer coating without (NM) and with Aloe vera liquid fraction (NM+Av) was evaluated on the postharvest quality of tomato fruit at 20 °C and 85% relative humidity (RH) to simulate direct consumption. Both nanomultilayer coatings had comparable effects on firmness and pH values. However, the NM+Av coating significantly reduced weight loss (4.5 ± 0.2%) and molds and yeasts (3.5–4.0 log CFU g⁻¹) compared to uncoated fruit (16.2 ± 1.2% and 8.0 ± 0.0 log CFU g⁻¹, respectively). It notably lowered O₂ consumption by 70% and a 52% decrease in CO₂ production, inhibiting ethylene synthesis. Visual evaluation confirmed NM+Av’s efficacy in preserving the postharvest quality of tomato. The preservation of color, indicated by the Minolta color (a*/b*) values, demonstrated NM+Av’s ability to keep the light red stage compared to uncoated fruit. The favorable effects of NM+Av coating on enhancing postharvest quality indicates it as a potential alternative for large-scale tomato fruit preservation. Full article