Field-Induced Polarization Rotation in Order-Disorder (K,Na)NbO-Based Ferroelectrics.

Phase boundary is highly recognized for its capability in engineering various physical properties of ferroelectrics. Here, field-induced polarization rotation is reported in a high-performance (K, Na)NbO-based ferroelectric system at the rhombohedral-tetragonal phase boundary. First, the lattice structure is examined from both macroscopic and local scales, implementing Rietveld refinement and pair distribution function analysis, respectively.

Origin of ultrahigh-performance barium titanate-based piezoelectrics: Stannum-induced intrinsic and extrinsic contributions.

Despite the pivotal role of stannum doping in achieving ultrahigh piezoelectric performance in barium titanate-based ceramics, the fundamental mechanisms underlying this enhancement remain elusive. Here, we introduce a single variable nonstoichiometric stannum strategy in lead-free barium titanate-based ceramics with giant piezoelectricity, revealing that stannum doping contributes intrinsically and extrinsically to enhance piezoelectricity. Density functional theory calculations elucidate the intrinsic enhancement of polarization arising from lattice distortion and increased space for titanium-oxygen bonds induced by optimal stannum doping, which is corroborated by Rayleigh analysis.

Pelvic pain education - A short review on pelvic pain and endometriosis educational programs for adolescents.

Persistent pelvic pain is a significant healthcare concern among adolescents; however adolescents often have poor health literacy regarding their pain. Current school curricula fail to specifically address pelvic pain and management strategies. This review aims to summarise current pelvic pain education programs in Australian and New Zealand schools.

Spontaneous Nasal Septal Abscess: A Case Report.

Nasal septal abscess (NSA) is considered a rhinologic emergency. Fortunately, the incidence of NSA has markedly reduced due to the introduction of antibiotics and easy access to medical care. NSA commonly results from infection in the space between the nasal septum and the overlying mucoperichondrium and/or mucoperiosteum, typically secondary to nasal septal hematoma, but it can also be idiopathic.

Identifying the Interfacial Polarization in Non-stoichiometric Lead-Free Perovskites by Defect Engineering.

Recent advances in perovskite ferroelectrics have fostered a host of exciting sensors and actuators. Defect engineering provides critical control of the performance of ferroelectric materials, especially lead-free ones. However, it remains a challenge to quantitatively study the concentration of defects due to the complexity of measurement techniques.

Embryonal Rhabdomyosarcoma: The Diagnostic Dilemma of a Rare Laryngeal Malignancy.

The larynx and the remaining components of the upper aerodigestive tract collectively play an important role in undertaking respiration, phonation, and deglutition. Therefore, a variety of pathologies can present with similar symptoms. Systemic diseases, such as rheumatoid arthritis and relapsing polychondritis, may also manifest with laryngeal symptoms and findings, whereas rare pathologies may present with vague presentations.

Unusual Site of Oral Sarcocystosis in the Tongue.

is an intracellular protozoan parasite that manifests as a sarcocyst within the muscle fibers of an intermediate host. commonly affects animals; in fact, cases of sarcocystosis involving human hosts are rare and often undiagnosed. The two types of species that may infect and utilize humans as a definitive host are and , both of which predominantly involve the gastrointestinal system.

Isolated-Oxygen-Vacancy Hardening in Lead-Free Piezoelectrics.

Defect engineering is a well-established approach to customize the functionalities of perovskite oxides. In demanding high-power applications of piezoelectric materials, acceptor doping serves as the state-of-the-art hardening approach, but inevitably deteriorates the electromechanical properties. Here, a new hardening effect associated with isolated oxygen vacancies for achieving well-balanced performances is proposed.

Domain Engineering in Bulk Ferroelectric Ceramics via Mesoscopic Chemical Inhomogeneity.

Domain engineering in ferroelectrics endows flexibility for different functional applications. Whereas the domain engineering strategy for single crystals and thin films is diverse, there is only a limited number of strategies for bulk ceramics. Here, a domain engineering strategy for achieving a compact domain architecture with increased domain-wall density in (K,Na)NbO (KNN)-based ferroelectric ceramics via mesoscopic chemical inhomogeneity (MCI) is developed.

Epidemiology of dermatologic disease in Palau: a cross-sectional study in the national public and community health service.

Background: Dermatologic disease is a neglected public health challenge that disproportionately affects resource-poor settings. Globally, dermatologic disease contributes the fourth highest burden of nonfatal disability with the most acute impact in the Oceanic region, including the Republic of Palau. Efforts to address the dermatologic health inequality are hindered without the necessary epidemiologic evidence to guide health policy in the resource-poor setting of Palau.

Painless Giant Submandibular Gland Sialolith: A Case Report.

Sialolithiasis is one of the most common diseases involving the salivary glands. It is a condition that occurs due to an obstruction in a salivary gland or its duct due to a calculus. The formation of a salivary stone is believed to be secondary to the deposition of mineral salts around a nidus, which is frequently associated with a recurrent bacterial infection.

Perception of telemedicine among medical practitioners in Malaysia during COVID-19.

The novel Coronavirus Disease 2019 (COVID-19) has brought unprecedented changes in the way conventional health care is delivered. This study examined if clinicians' perceptions regarding telemedicine and its barriers to implementation in Malaysia have changed during this pandemic. A cross-sectional survey was conducted among Malaysian medical doctors of various specialties in four urban healthcare facilities between June 2020 and July 2020.

Metastatic carcinoma of the lung presenting as jugular venous thrombosis: a valuable clinical lesson.

Thromboses of the upper extremity and neck are rare and not as commonly seen as lower extremity deep vein thrombosis (DVT). Internal jugular vein thrombosis (IJVT) is a serious condition with a potentially fatal outcome. Jugular vein thrombosis refers to the formation of intraluminal thrombi anywhere from the intracranial part of the jugular vein to the junction between the internal jugular vein (IJV) and subclavian vein.

Rapid Wound Healing and Acne Scar Improvement After Ablative Fractional Carbon Dioxide Laser Treatment Combined with the Application of Platelet-Lyophilized Treatment (PLT).

Objective: There are several clinical cases on the application of PRP (platelet-rich plasma) therapies. To improve disadvantages such as the inability to be standardized and stored long term, we proposed a novel platelet-lyophilized treatment (PLT) to enhance the wound healing rate and improve acne scarring.

Study Design: A single-blinded study at a single health care center was performed.

Magnolol may contribute to barrier function improvement on imiquimod-induced psoriasis-like dermatitis animal model via the downregulation of interleukin-23.

Psoriasis is a chronic, recurrent, immune-mediated disease involving the skin and joints. Epidermal hyperproliferation, abnormal keratinocyte differentiation, angiogenesis with blood vessel dilatation, and excess T helper type-1 (Th-1) and Th-17 cell infiltration are the main histopathological features of psoriasis. Magnolol is a polyphenolic compound that exerts its biological properties through a variety of mechanisms such as the NF-κB/MAPK, Nrf2/HO-1 and PI3K/Akt pathways.

Recurrent Submandibular Sialolithiasis in a Child.

Sialolithiasis is a commonly encountered disease of the salivary glands, reported to represent up to 30% of all salivary gland diseases. However, the condition is rarely encountered in the pediatric population. The formation of a salivary stone is believed to be secondary to the deposition of calcium salts around a nidus.

Temporal Bone Chondroblastoma: a Rare Entity.

Introduction: Chondroblastoma is an uncommon benign, locally destructive tumor that usually arises from epiphyses of the long bones. Temporal bone chondroblastoma is an extremely rare occurrence. Chondroblastoma arise from immature cartilage cells and it may display certain malignant features by invading surrounding structures and metastasizing to adjacent sites.

A review of smell and taste dysfunction in COVID-19 patients.

Introduction: Multiple anecdotal reports suggest that smell and taste loss were early subclinical symptoms of COVID-19 patients. The objective of this review was to identify the incidence of smell and taste dysfunction in COVID-19, determine the onset of their symptoms and the risk factors of anosmia, hyposmia, ageusia or dysgeusia for COVID-19 infection.

Methods: We searched the PubMed and Google Scholar on 15th May 2020, with search terms including SARS-COV-2, coronavirus, COVID-19, hyposmia, anosmia, ageusia and dysgeusia.

Salvianolic Acid B in Microemulsion Formulation Provided Sufficient Hydration for Dry Skin and Ameliorated the Severity of Imiquimod-Induced Psoriasis-Like Dermatitis in Mice.

Psoriasis is a chronic inflammatory skin disorder with a pathogenesis involving the interleukin-23/interleukin-17 axis. Salvianolic acid B exerts several pharmacological effects, such as antioxidation, anti-inflammation, and antitumor effects. The anti-psoriatic effects of salvianolic acid B have not been reported.

Benign Lymphoepithelial Cyst: An Unusual Cause of Parotid Swelling in Two Immunocompetent Patients.

Background: Lymphoepithelial cysts, which are benign and slow-growing tumours, usually involve the head and neck regions. Benign lymphoepithelial cysts (BLECs) are the most common cause of parotid swelling in human immunodeficiency virus (HIV)-positive patients and are less common in immunocompetent patients.

Case Presentation: Here, we present two cases of immunocompetent patients with long-standing, progressively enlarging parotid swelling.

Significantly improved piezoelectric performance of PZT-PMnN ceramics prepared by spark plasma sintering.

A high-performance piezoelectric material, 0.95Pb(ZrTi)O-0.05Pb(MnNb)O (PZT-PMnN) ceramic, was prepared by using a spark plasma sintering (SPS) method.

Forebrain medial septum sustains experimental neuropathic pain.

The present study explored the role of the medial septal region (MS) in experimental neuropathic pain. For the first time, we found that the MS sustains nociceptive behaviors in rodent models of neuropathic pain, especially in the chronic constriction injury (CCI) model and the paclitaxel model of chemotherapy-induced neuropathic pain. For example, inactivation of the MS with intraseptal muscimol (2 μg/μl, 0.

Temperature-Insensitive Piezoelectric Performance in Pb(ZrTiSnNb)O Ceramics Prepared by Spark Plasma Sintering.

Dense Pb(ZrTiSnNb)O high-performance piezoceramics were prepared by spark plasma sintering. Phase structure, domain structure, and temperature-dependent electrical properties were systematically investigated. The spark-plasma-sintered ceramics possess a pure perovskite structure with rhombohedral-tetragonal (R-T) phase boundaries and a high Curie temperature of 347 °C.