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Spectrum of delayed post-hypoxic leukoencephalopathy syndrome: A systematic review

BACKGROUND Delayed post hypoxic leukoencephalopathy syndrome (DPHLS), also known as Grinker’s myelinopathy, is a rare but significant neurological condition that manifests days to weeks after a hypoxic event. Characterized by delayed onset of neurological and cognitive deficits, DPHLS presents substantial diagnostic and therapeutic challenges. AIM To consolidate current knowledge on pathophysiology, clinical features, diagnostic approaches, and management strategies for DPHLS, providing a comprehensive overview and highlighting gaps for future research. METHODS Following the Preferred Reporting Items for Systematic Reviews and Meta-Analyzes guidelines, we systematically searched PubMed, ScienceDirect and Hinari databases using terms related to delayed post-hypoxic leukoencephalopathy. Inclusion criteria were original research articles, case reports, and case series involving human subjects with detailed clinical, neuroimaging, or pathological data on DPHLS. Data were extracted on study characteristics, participant demographics, clinical features, neuroimaging findings, pathological findings, treatment, and outcomes. The quality assessment was performed using the Joanna Briggs Institute critical appraisal checklist. RESULTS A total of 73 cases were reviewed. Common comorbidities included schizoaffective disorder, bipolar disorder, hypertension, and substance use disorder. The primary causes of hypoxia were benzodiazepine overdose, opioid overdose, polysubstance overdose, and carbon monoxide (CO) poisoning. Symptoms frequently include decreased level of consciousness, psychomotor agitation, cognitive decline, parkinsonism, and encephalopathy. Neuroimaging commonly revealed diffuse T2 hyperintensities in cerebral white matter, sometimes involving the basal ganglia and the globus pallidus. Magnetic resonance spectroscopy often showed decreased N-acetylaspartate, elevated choline, choline-to-creatinine ratio, and normal or elevated lactate. Treatment is often supportive, including amantadine, an antioxidant cocktail, and steroids. Hyperbaric oxygen therapy may be beneficial in those with CO poisoning. Parkinsonism was often treated with levodopa. Most of the patients had substantial recovery over the course of months and many cases had some residual neurocognitive deficits. CONCLUSION DPHLS remains a complex and multifaceted condition with various etiologies and clinical manifestations. Early recognition and appropriate management are crucial to improving patient outcomes. Future research should focus on standardizing diagnostic criteria, using advanced imaging techniques, and exploring therapeutic interventions to improve understanding and treatment of DPHLS. Conducting prospective cohort studies and developing biomarkers for early diagnosis and monitoring will be essential to advance patient care.

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Tumor Hypoxia and Radioresistance

Tumor hypoxia is a prevalent feature of solid tumors, significantly contributing to increased tumor aggressiveness, metastatic potential, and resistance to conventional therapies such as radiotherapy. This review explores the complex relationship between tumor hypoxia and radioresistance, highlighting the molecular mechanisms involved and potential therapeutic strategies to enhance radiotherapy efficacy in hypoxic tumors. Key mechanisms include the role of hypoxia-inducible factors (HIFs), particularly HIF-1α, which regulates numerous genes involved in tumor survival, proliferation, and resistance under hypoxic conditions. The review also discusses the oxygen enhancement ratio (OER) and its impact on radiotherapy outcomes, emphasizing how hypoxia leads to reduced radiosensitivity by limiting the formation of radiation-induced DNA damage. Despite the development of various strategies to counteract hypoxia-induced radioresistance, such as HIF inhibitors, hypoxia-targeted gene therapy, and hypoxia-activated prodrugs (HAPs), clinical results have been mixed, necessitating further research. Additionally, advances in imaging techniques for detecting tumor hypoxia are explored, which may allow for more personalized radiotherapy approaches, such as dose painting. The future of overcoming tumor hypoxia in radiotherapy lies in the integration of innovative therapeutic strategies, personalized medicine, and improved imaging technologies, offering hope for enhanced treatment outcomes in cancer patients.

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Big cities, big bodies: urbanisation correlates with large body sizes and enhanced body condition in African dwarf chameleons (Genus: Bradypodion)

Urbanisation is a major driver of habitat transformation that alters the environmental conditions and selective regimes of the habitats where it occurs. For species inhabiting urban habitats, such alterations can facilitate adaptive responses in their phenotypes, including their morphology. Quantifying potential responses could provide important information for assessing adaptation to urbanisation and may also be relevant to their conservation. Previous studies on African dwarf chameleons (Bradypodion) have shown these lizards to have remarkable adaptive capacity in response to different habitats (e.g. closed canopy habitats vs. open canopy habitats). Several of these species exploit urban habitats, but the extent to which populations are adapting to urban environments has only recently started to receive attention. In this study, we quantify differences in body size and body condition between urban and natural populations of five species of dwarf chameleons. For most comparisons, either females, males or both sexes from urban populations were longer, heavier and/or had better body condition than those from natural populations. In the remaining cases, there were no differences in these traits between populations. Our findings conform with the emerging paradigm that urbanisation positively correlates with enhanced lizard body sizes and condition, although the reasons for this may be complex. Nevertheless, our data provide an avenue for future research into investigating the potential factors (e.g. food supply, predation risk, etc.) that facilitate the trends we observed.

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Transforming Educational Environments: A Comprehensive Study on the Acceptance and Social Attitudes Towards LGBTQIA+ Students within Higher Education

<p style="text-align:justify">This study investigates the social attitudes and acceptance levels towards Lesbian, Gay, Bisexual, Transgender, Queer or Questioning, Intersex, Asexual, and other sexualities and gender identities, collectively referred to as LGBTQIA+, among students within the College of Education at Nueva Ecija University of Science and Technology. Employing a descriptive correlational research design, the research utilized surveys and interviews to collect data from a diverse student body, analyzing their perspectives on LGBTQIA+ inclusion and the impact of educational environments on their acceptance levels. Results indicate a generally positive attitude and high acceptance of LGBTQIA+ students, with significant relationships identified between students' acceptance levels and their gender and year level, while no significant correlations were found with their course and religion. The study emphasizes the critical role of educational settings in fostering an inclusive atmosphere that supports LGBTQIA+ students, highlighting the importance of promoting understanding and acceptance to enhance the educational experience for all students. By shedding light on current attitudes and acceptance levels, this research contributes valuable insights into the efforts required to create more inclusive educational environments for LGBTQIA+ individuals. The findings are of particular relevance to educators, policymakers, and educational researchers interested in advancing LGBTQIA+ inclusion within educational settings.</p>

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Enhancing Learner Autonomy and Cultural Awareness: Strategies of Vietnamese Tertiary-Level EFL Teachers

<p style="text-align:justify">This qualitative study investigates the strategies employed by Vietnamese tertiary-level English as a Foreign Language (EFL) teachers to promote learner autonomy (LA) and enhance cultural awareness. This research provides a deeper understanding of EFL teaching practices in this setting, conducted in the context of Vietnam’s evolving educational landscape, where English proficiency and cultural competence are increasingly prioritized. The study utilized semi-structured interviews with nine EFL teachers from two different Vietnamese tertiary institutions, representing various career stages: novice, mid-career, and near-end career. Thematic analysis was employed to analyze the data, revealing a range of strategies encompassing collaborative learning, technology integration, personalized feedback, real-life scenarios and role-play, reflective learning practices, local culture incorporation, contextualized language instruction, critical thinking, and cultural analysis, student-centered environments, interdisciplinary approaches, language skills for intercultural communication, and authentic material use. Findings highlight the multifaceted nature of language teaching, emphasizing not just linguistic competence but also cultural understanding and LA. These strategies are crucial in a globalized world where intercultural communication is a key skill. The study suggests the need for continuous professional development and policy support for diverse and holistic teaching practices. It offers practical insights for EFL educators, particularly in similar socio-cultural contexts, on integrating various strategies to enhance language skills and cultural awareness.</p>

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Review article on self emulsifying system

The solubility challenges faced by the pharmaceutical industry, particularly with orally administered drugs, are indeed significant. Low aqueous solubility often leads to poor dissolution and subsequently, low bioavailability, which can result in inconsistent drug effects among patients. Various methods have been explored to address this issue, including salt formation, solid dispersion, and complex formation.Among these approaches, Self-Emulsifying Drug Delivery Systems (SEDDS) have emerged as a promising solution for enhancing the solubility of lipophilic drugs. SEDDS consist of isotropic mixtures of hydrophilic solvents, co-solvents, and surfactants. They possess the unique ability to form fine oil-in-water micro emulsions upon mild agitation and dilution in aqueous media, such as gastrointestinal fluids.The advancement in SEDDS technology encompasses improvements in composition, evaluation methods, development of different dosage forms, and techniques for converting liquid SEDDS into solid forms. These advancements not only enhance solubility but also offer versatility in administration routes and dosage forms, thereby expanding the potential applications of SEDDS in pharmaceutical formulations.This comprehensive review provides valuable insights into the latest developments in SEDDS, offering a detailed account of its composition, evaluation parameters, diverse dosage forms, and innovative techniques for solidification. Moreover, it highlights the diverse applications of SEDDS across various therapeutic areas, underscoring its growing significance in modern pharmaceutical research and development.

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Формирование корпоративной культуры бережливого производства в современных условиях

The current stage of development of the national economy is associated with the formation of technological sovereignty of the country. Harsh sanctions, existing restrictions on access to certain market segments, digitalization and other challenges form an explicit request to Russian business to transform approaches to the organization of production, aimed primarily at increasing labor productivity, which is possible due to several main factors: the development of the production and technical base, maximizing the use of people-human capital and optimization of organizational factors. The first factor is quite costly and time-consuming in terms of implementation. The development of human and organizational factors can be carried out through lean production tools, the main problem of which is the significant resistance of personnel to new introductions. The work of foreign and domestic scientists and practitioners in the field of lean manufacturing and corporate culture has been studied, which allowed to formulate the author's definition of “corporate culture of lean production”, which allowed to develop a model of corporate culture of lean production at three levels of management (TOP, Middle, Down Management). The proposed model of transformation of the existing corporate culture into a corporate culture of lean production is considered in three planes with the designation of the stages of formation of a new corporate culture. It is noted that only voluntary adherence to a new ideology can maximize the effectiveness of innovations.

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