Survival among 148 patients with an incidentally detected appendiceal tumours at surgery for acute appendicitis: a population-based cohort follow-up study.

Purpose: To investigate the long-term prognosis of appendiceal tumours incidentally detected at appendicectomy for suspicion of benign appendicitis.

Methods: A retrospective register-based single centre cohort study was carried out, using data from the local acute appendicectomy quality register of cases operated on at the Department of Surgery, South General Hospital, Stockholm, Sweden. The local colorectal cancer register was also used to identify appendix tumours.

Electron Glass Phase with Resilient Zhang-Rice Singlets in LiCu_{3}O_{3}.

LiCu_{3}O_{3} is an antiferromagnetic mixed valence cuprate where trilayers of edge-sharing Cu(II)O (3d^{9}) are sandwiched in between planes of Cu(I) (3d^{10}) ions, with Li stochastically substituting Cu(II). Angle-resolved photoemission spectroscopy (ARPES) and density functional theory reveal two insulating electronic subsystems that are segregated in spite of sharing common oxygen atoms: a Cu d_{z^{2}}/O p_{z} derived valence band (VB) dispersing on the Cu(I) plane, and a Cu 3d_{x^{2}-y^{2}}/O 2p_{x,y} derived Zhang-Rice singlet (ZRS) band dispersing on the Cu(II)O planes. First-principle analysis shows the Li substitution to stabilize the insulating ground state, but only if antiferromagnetic correlations are present.

Granzyme B is elevated in esophageal biopsies from children with eosinophilic esophagitis.

Objectives: Eosinophilic esophagitis (EoE) is an immune-mediated antigen-triggered inflammatory disease of the esophagus. Our aim was to investigate inflammatory responses by an ex vivo biopsy provocation-based method, stimulating biopsies with milk, wheat, and egg extracts.

Methods: An experimental study was conducted on esophageal biopsies from children who underwent esophagogastroduodenoscopy.

Achieving environmental stability in an atomically thin quantum spin Hall insulator via graphene intercalation.

Atomic monolayers on semiconductor surfaces represent an emerging class of functional quantum materials in the two-dimensional limit - ranging from superconductors and Mott insulators to ferroelectrics and quantum spin Hall insulators. Indenene, a triangular monolayer of indium with a gap of ~ 120 meV is a quantum spin Hall insulator whose micron-scale epitaxial growth on SiC(0001) makes it technologically relevant. However, its suitability for room-temperature spintronics is challenged by the instability of its topological character in air.

Room Temperature Ion Beam Synthesis of Ultra-Fine Molybdenum Carbide Nanoparticles: Toward a Scalable Fabrication Route for Earth-Abundant Electrodes.

Molybdenum carbides are promising low-cost electrocatalysts for electrolyzers, fuel cells, and batteries. However, synthesis of ultrafine, phase-pure carbide nanoparticles (diameter < 5 nm) with large surface areas remains challenging due to uncontrollable agglomeration that occurs during traditional high temperature syntheses. This work presents a scalable, physical approach to synthesize molybdenum carbide nanoparticles at room temperature by ion implantation.

Measurement properties of the life history of aggression in adolescents: Data from Morocco, Serbia, Sweden, Vietnam, and the USA.

The Life History of Aggression (LHA) is a frequently used scale for assessing trait aggression, but its psychometric properties have not been evaluated among adolescents. The aim of this study was to evaluate the psychometric properties of the LHA among high school students from Morocco, Serbia, Sweden, Vietnam, and the United States of America (USA). The total sample included 4867 adolescents, aged 15-19 years, from Morocco (n = 508), Serbia (n = 1067), Sweden (n = 1570), Vietnam (n = 1401), and the USA (n = 321).

"I Have No Capacities That Can Help Me": Young Asylum Seekers in Norway and Serbia - Flight as Disturbance of Developmental Processes.

Most studies on refugee populations are organized around trauma-related issues and focus on explaining pathological factors. Few studies are anchored in general developmental psychology with the aim of exploring normal age-specific developmental tasks and how the special circumstances associated with forced migration can influence how developmental tasks are negotiated. This study is part of a larger mixed method study seeking to identify resilience-promoting and resilience-inhibiting factors, on individual and contextual levels, among asylum seekers and refugees on the move (passing through Serbia) and settled in reception centers in Norway.

Tetragonal CoMnO nanocrystals on electrospun carbon fibers as high-performance battery-type supercapacitor electrode materials.

We herein report a simple two-step procedure for fabricating tetragonal CoMnO spinel nanocrystals on carbon fibers. The battery-type behavior of these composite fibers arises from the redox activity of CoMnO in an alkaline aqueous solution, which, in combination with the carbon fibers, endows good electrochemical performance and long-term stability. The C@CoMnO electrode exhibited high specific capacity, up to 62 mA h g at 1 A g with a capacity retention of around 90% after 4000 cycles.

Ironsand (Titanomagnetite-Titanohematite): Chemistry, Magnetic Properties and Direct Applications for Wireless Power Transfer.

Ironsand is an abundant and inexpensive magnetic mineral resource. However, the magnetic properties of unprocessed ironsand are often inadequate for any practical applications. In this work, the applicability of ironsand for use as a component in a soft magnetic composite for large-scale inductive power transfer applications was investigated.

Changes in Adolescents' Psychosocial Functioning and Well-Being as a Consequence of Long-Term COVID-19 Restrictions.

This work studied self-reports from adolescents on how the COVID-19 pandemic has changed their behaviors, relationships, mood, and victimization. Data collection was conducted between September 2020 and February 2021 in five countries (Sweden, the USA, Serbia, Morocco, and Vietnam). In total, 5114 high school students (aged 15 to 19 years, 61.

Chemiluminescent Measurement of Hydrogen Peroxide in the Exhaled Breath Condensate of Healthy and Asthmatic Adults.

Reactive oxygen species are centrally involved in the pathophysiology of airway diseases such as asthma and chronic obstructive pulmonary disease. This study reports the development of a chemiluminescence assay and a device for measuring hydrogen peroxide in the exhaled breath condensate of asthma patients and healthy participants. A stand-alone photon detection device was constructed for use with an optimized chemiluminescence assay.

Etching of Uncompensated Convex Corners with Sides along and <100> in 25 wt% TMAH at 80 °C.

This paper presents etching of convex corners with sides along and <100> crystallographic directions in a 25 wt% tetramethylammonium hydroxide (TMAH) water solution at 80 °C. We analyzed parallelograms as the mask patterns for anisotropic wet etching of Si (100). The sides of the parallelograms were designed along and <100> crystallographic directions (1 < n < 8).

Water adsorption on vanadium oxide thin films in ambient relative humidity.

In this work, ambient pressure x-ray photoelectron spectroscopy (APXPS) is used to study the initial stages of water adsorption on vanadium oxide surfaces. V 2p, O 1s, C 1s, and valence band XPS spectra were collected as a function of relative humidity in a series of isotherm and isobar experiments. Experiments were carried out on two VO thin films on TiO (100) substrates, prepared with different surface cleaning procedures.

The Itinerant 2D Electron Gas of the Indium Oxide (111) Surface: Implications for Carbon- and Energy-Conversion Applications.

Transparent conducting oxides (TCO) have integral and emerging roles in photovoltaic, thermoelectric energy conversion, and more recently, photocatalytic systems. The functional properties of TCOs, and thus their role in these applications, are often mediated by the bulk electronic band structure but are also strongly influenced by the electronic structure of the native surface 2D electron gas (2DEG), particularly under operating conditions. This study investigates the 2DEG, and its response to changes in chemistry, at the (111) surface of the model TCO In O , through angle resolved and core level X-ray photoemission spectroscopy.

Evolution of Si Crystallographic Planes-Etching of Square and Circle Patterns in 25 wt % TMAH.

Squares and circles are basic patterns for most mask designs of silicon microdevices. Evolution of etched Si crystallographic planes defined by square and circle patterns in the masking layer is presented and analyzed in this paper. The sides of square patterns in the masking layer are designed along predetermined crystallographic directions.

Observation of Weakened V-V Dimers in the Monoclinic Metallic Phase of Strained VO_{2}.

Emergent order at mesoscopic length scales in condensed matter can provide fundamental insight into the underlying competing interactions and their relationship with the order parameter. Using spectromicroscopy, we show that mesoscopic stripe order near the metal-insulator transition (MIT) of strained VO_{2} represents periodic modulations in both crystal symmetry and V-V dimerization. Above the MIT, we unexpectedly find the long-range order of V-V dimer strength and crystal symmetry become dissociated beyond ≈200  nm, whereas the conductivity transition proceeds homogeneously in a narrow temperature range.

How Indium Nitride Senses Water.

The unique electronic band structure of indium nitride InN, part of the industrially significant III-N class of semiconductors, offers charge transport properties with great application potential due to its robust n-type conductivity. Here, we explore the water sensing mechanism of InN thin films. Using angle-resolved photoemission spectroscopy, core level spectroscopy, and theory, we derive the charge carrier density and electrical potential of a two-dimensional electron gas, 2DEG, at the InN surface and monitor its electronic properties upon in situ modulation of adsorbed water.

A soft X-ray spectroscopic perspective of electron localization and transport in tungsten doped bismuth vanadate single crystals.

Doped BiVO is a promising photoelectrochemical water splitting anode, whose activity is hampered by poor charge transport. Here we use a set of X-ray spectroscopic methods to probe the origin and nature of localized electron states in W:BiVO. Furthermore, using the polarized nature of the X-rays, we probe variations in the electronic structure along the crystal axes.

Heterojunction synergies in titania-supported gold photocatalysts: implications for solar hydrogen production.

The mixed-phase nature of P25 TiO2 (85 % anatase/15 % rutile) plays a key role in the high H2 production rates shown by Au/P25 TiO2 photocatalysts in alcohol/water systems. However, a full understanding of the synergistic charge transfer mechanisms between the TiO2 polymorphs that drive the high rates is yet to be realised. Here, we deconstruct P25 TiO2 into its component phases, functionalise the phases with Au nanoparticles and explore charge transfer in Au/TiO2 systems using EPR spectroscopy.

Residual treatment of Aedes aegypti (Diptera: Culicidae) in containers using pyriproxyfen slow-release granules (Sumilarv 0.5G).

The residual efficacy of pyriproxyfen against Aedes aegypti (L.) was examined by treating 2-liter buckets with a range of rates of Sumilarv 0.5G (100, 10, 1, and 0.

Hydrogen production by tuning the photonic band gap with the electronic band gap of TiO₂.

Tuning the photonic band gap (PBG) to the electronic band gap (EBG) of Au/TiO2 catalysts resulted in considerable enhancement of the photocatalytic water splitting to hydrogen under direct sunlight. Au/TiO2 (PBG-357 nm) photocatalyst exhibited superior photocatalytic performance under both UV and sunlight compared to the Au/TiO2 (PBG-585 nm) photocatalyst and both are higher than Au/TiO2 without the 3 dimensionally ordered macro-porous structure materials. The very high photocatalytic activity is attributed to suppression of a fraction of electron-hole recombination route due to the co-incidence of the PBG with the EBG of TiO2 These materials that maintain their activity with very small amount of sacrificial agents (down to 0.

Intraarticular nodular fasciitis of the hip.

Intraarticular nodular fasciitis is a rare lesion that has only recently been recognised. We present a case of intraarticular nodular fasciitis of the hip joint in a 25-year-old woman, who presented with a 9-month-history of right groin pain and a decreased range of right hip motion. A polypoid mass, composed of five nodules attached to the synovial membrane of the distal peripheral compartment of the hip was removed arthroscopically, together with two detached nodules.

Investigation of NK cell function and their modulation in different malignancies.

NK cells have become a subject of investigation not only in the field of tumor immunology and infectious diseases, but also within all aspects of immunology, such as transplantation, autoimmunity, and hypersensitivity. Our early studies aside from investigating NK cell activity in experimental animals and humans included studies of perforin expression and modulation in this lymphocyte subset. As NK cell activity is modified by their environment, we showed clinical stage-dependent impairment of their activity and in vitro effect of different sera, Th1 cytokines, and their combination in breast cancer, Hodgkin's disease, and non-Hodgkin's lymphoma patients, especially with respect to metabolic and cell membrane changes of peripheral blood lymphocytes evaluated by spontaneous release of the enzyme lactate dehydrogenase (LDH) that led to the correction of the LDH enzyme release assay for natural cytotoxicity.

[Gender differences in victims of war torture: types of torture and psychological consequences].

Background/aim: Torture for political reasons is an extreme violence in interpersonal relations resulting in not only acute psychiatric disorders but also very often in very severe and far reaching negative consequences for the overall psychosocial functioning of a victim. The aim of this study was to investigate gender differences in types of torture and psychological consequences in subjects who experienced war torture.

Methods: A sample (410 men and 76 women) included clients of "Centre for rehabilitation of torture victims--IAN, Belgrade" who experienced torture in prisons and concentration camps during civil wars in ex-Yugoslavia 1991-1995 and 1999.

Activity of MMP-2 and MMP-9 in sera of breast cancer patients.

Gelatinase A (MMP-2) and gelatinase B (MMP-9) are proteolytic enzymes involved in the process of tumor invasion, and they are considered as possible tumor markers in breast cancer patients. In this study, we examined serum activity of proMMP-2 and proMMP-9 in relation to TNM stage, tumor size, lymph node involvement, grade of differentiation of tumors, as well as steroid and Her2/neu receptor status in breast cancer patients. The activity of gelatinase in the sera of 52 patients was analyzed by SDS-PAGE zymography.