A tribochemistry-induced selective etching approach is proposed for the first time to produce silicon nanostructures without lattice damage. With a ~1 nm thick SiOx film as etching mask grown on Si(100) surface (Si(100)/SiOx) by wet-oxidation technique, nano-trenches can be produced through the removal of local SiOx mask by a SiO2 tip in humid air and the post-etching of the exposed Si in potas...

Large amounts of septic tank sludges from sanitation facilities are either landfilled or illegally dumped into the natural environment, leading to environmental pollution and waste resources. This issue calls for advanced methods recycle such as sustainable adsorbents phosphorus, e.g., in agriculture, context circular economy. Here, we hypothesized that alkaline sludge biochar could be an effic...

The common cause of skin infections are dermatophytes and opportunistic fungi. Aim of this study was to isolate and identify the fungal agents from clinical samples from patients with different mycoses. Clinical samples from 165 patients were subjected to potassium hydroxide (KOH) examination and culture isolation; causative agents were identified macroscopically and microscopically. All the 16...

OBJECTIVE To discuss the possible etiopathogenetic mechanism of inner ear damage induced by the ingestion of potassium hydroxide (KOH). CLINICAL PRESENTATION AND INTERVENTION We report the case of a 37-year-old patient with sudden bilateral sensorineural hearing loss after accidental ingestion of a KOH solution. The first ear, nose and throat examination disclosed only mild edema of the upper...

To cite: Hamzelou S, Jafari M, Aminizadeh E, et al. BMJ Case Rep Published online: [please include Day Month Year] doi:10.1136/bcr-2014203758 DESCRIPTION An 80-year-old man presented with erythema, scales and some yellow pustules on his left ear auricle (figure 1), most prominent on his helix (figure 2). His symptom was itchiness with no discharge. The patient was a farmer. He mentioned that th...

OBJECTIVE Our purpose was to estimate and compare the cost-effectiveness of the most commonly used diagnostic tests for onychomycosis: potassium hydroxide preparation (KOH), interpreted both by a dermatologist (KOH-CLINIC) and a laboratory technician (KOH-LAB); KOH with dimethyl sulfoxide (KOH-DMSO) and with chlorazol black E (KOH-CBE), interpreted by a dermatologist; culture using dermatophyte...

With increasing climate variability, a sustainable crop production approach remains an indispensable concern across the globe. In this study, P retention/availability of MgCl2.6H2O/KOH modified Douglas fir biochar was assessed. The MgCl2·6H2O/KOH treated prepared by sequentially treating with magnesium chloride and potassium hydroxide solutions. biochar’s surface area, pore volume, morphology, ...

Carbon powder was synthesized from bamboo shoots by chemical activation. The porous carbon powders were activated potassium hydroxide (KOH) with a ratio of (C) and KOH (C : KOH) 1 1, 2, 3, 4 weight, respectively. Structure, morphological properties, the porosity investigated XRD, EDX, SEM, BET. electrochemical performances measured charge/discharge (CD) cyclic voltammetry (CV) techniques. Speci...

BACKGROUND The diagnosis of Candida vulvovaginitis using historical symptoms, pelvic examination findings, and results of traditional in-office laboratory tests is often inaccurate. Although Candida cultures can verify the diagnosis, they are not routinely used. METHODS We prospectively compared the accuracy of a commercially available, in-office, rapid, latex agglutination test (CandidaSure)...