Unveiling Versatile Applications and Toxicity Considerations of Graphitic Carbon Nitride.

Metal-free, low-cost, organic photocatalytic graphitic carbon nitride (g-CN) has become a promising and impressive material in numerous scientific fields due to its unique physical and chemical properties. As a semiconductor with a suitable band gap of ~2.7 eV, g-CN is an active photocatalytic material even after irradiation with visible light.

Effervescent ferrate(VI)-based tablets as an effective means for removal SARS-CoV-2 RNA, pharmaceuticals and resistant bacteria from wastewater.

Waterborne pathogens including viruses, bacteria and micropollutants secreted from population can spread through the sewerage system. In this study, the efficiency of unique effervescent ferrate-based tablets was evaluated for total RNA and DNA removal, disinfection and degradation of micropollutants in hospital wastewater. For the purpose of testing, proposed tablets (based on citric acid or sodium dihydrogen phosphate) were used for various types of hospital wastewater with specific biological and chemical contamination.

Ferrate (VI), Fenton Reaction and Its Modification: An Effective Method of Removing SARS-CoV-2 RNA from Hospital Wastewater.

The outbreak of the coronavirus disease 2019 (COVID-19) raises questions about the effective inactivation of its causative agent, Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) in medical wastewater by disinfectants. For this reason, our study of wastewater from a selected hospital evaluated several different advanced oxidation methods (Fenton reaction and Fenton-like reaction and ferrate (VI)) capable of effectively removing SARS-CoV-2 RNA. The obtained results of all investigated oxidation processes, such as ferrates, Fenton reaction and its modifications achieved above 90% efficiency in degradation of SARS-CoV-2 RNA in model water.

Sorption of SARS-CoV-2 Virus Particles to the Surface of Microplastics Released during Washing Processes.

The research aims at washing processes as possible sources of microplastics, specifical microfibers in wastewater, and the behavior of the virus particles SARS-CoV-2 in wastewater after the washing process as well as their ability to sorb to the surface of microfibers, released from washing processes. The conclusions of the research point to the ability of the virus to attach to possible solid impurities such as textile fibers (microfibers) occurring in the sewer and to the ability of wash water to influence their possible occurrence in the sewer. The highest efficiency (more than 99%) of removal virus particles was after washing process, using liquid washing powder, and washing soda.

Corrosion Resistance of MgZnCa and ZnMgCa Alloys for Application in Medicine.

The aim of this work was to monitor the corrosion rate of the MgZnCa and ZnMgCa alloys. The purity of the alloying elements was 99.9%.

Wastewater analysis: the mean of the monitoring of frequently prescribed pharmaceuticals in Slovakia.

The estimation of medication use is based on the statistical data from pharmacies and hospitals. Excessive use or misuse of some compounds, especially psychoactive medications, has not yet been monitored in Slovakia. Wastewater analysis provides useful data about the medication use and misuse in individual regions.

Quantitative measurement of retinal hemorrhages in suspected victims of child abuse.

Purpose: Child abuse is one of the leading causes of death in early childhood. The presence of retinal hemorrhages often supports the diagnosis. The purpose of this study was to determine whether the specific measurement of retinal hemorrhages when present on fundus photography correlates with other clinical findings typically seen in children suspected of having been abused.

Weekly high-dose ergocalciferol to correct vitamin D deficiency/insufficiency in hemodialysis patients: a pilot trial.

Controversy exists on which vitamin D (D2 or D3) and which dosage scheme is the best to obtain and maintain adequate 25 OH D levels in dialysis patients safely. We tried to determine whether high-dose vitamin D2 supplementation could obtain optimal vitamin D status without inducing hypercalcemia. We studied 82 patients on dialysis not taking active vitamin D therapy and supplemented them with oral vitamin D2 72,000 IU/week for 12 weeks followed by 24,000 IU/week as maintenance therapy during 36 weeks.

National study of illicit drug use in Slovakia based on wastewater analysis.

The aim of this study was to analyze illicit drugs and their metabolites in wastewater from eight selected wastewater treatment plants (WWTPs) in Slovakia. The effect of two of the biggest music festivals in Slovakia on illicit drugs in wastewater was also investigated. Urinary bio-markers of amphetamine, methamphetamine, cocaine, cannabis and ecstasy use were analyzed by liquid chromatography coupled with tandem mass spectrometry (LC-MS/MS).

Pilot study of seasonal occurrence and distribution of antibiotics and drug resistant bacteria in wastewater treatment plants in Slovakia.

This work presents environmental and quality-control data from the analyses of 33 antibiotics in influent and effluent water from two waste water treatment plants (WWTPs) in the capital and the biggest city of Slovakia. Seeing that consumption of antibiotics depends on epidemiological season, samples were collected during February and August. Among assessed antibiotics ciprofloxacin and clarithromycin were detected in highest concentrations in influent water.

Evaluation a range of the motion of knee during femoral lengthening by Ilizarov method.

Background. Extensory contracture of the knee joint is a constant problem during thigh lengthening procedures. Its occurrence is dependent on such factors as rehabilitation, the construction of the Ilizarov apparatus, the extent of the lengthening, and the etiology of the shortening.

Upper leg lengthening on an intramedullary nail: a preliminary report.

Current methods of treatment for anisomelia are based on distraction osteogenesis. This involves creating callus during gradual distraction using an external fixator. The lengthening of long bones by Ilizarov's method requires keeping the external fixator in place for a long period of time, which increases the risk of complications, such as pin - track infection, stiffness of the joint, misalignment, and fracture of the regenerate.

Femoral lengthening over intramedullary nail: the theoretical basis.

The paper presents the currently available possibilities for using a locked intramedullary nail in femoral lengthening. Additional fixation of the bone lengthened over an intramedullary nail permits earlier removal of the external distracter, as soon as the planned bone lengthening is obtained. Even though the necessary surgery is more extensive, the proposed procedure reduces the risk of fracture in the lengthened femur and entail less restriction of knee joint mobility.

External fixation in the treatment of severe tibial fractures complicated by soft tissue injury.

Background. In recent years multiple injuries to the tibial shaft have become increasingly common. High-energy impacts cause comminuted fractures, often accompanied by damage to neural and vascular structures, muscle, and surface layers.

Some features of the ecology of fleas inhabiting the nests of the suslik (Citellus citellus (L.)). I: Population dynamics, sex ratio, feeding, reproduction.

While studying the suslik fleas in artificial nests planted in free nature, significant changes in the population dynamics of N. setosa, C. simplex and C.

Mosquito studies on the Isla de la Juventud, Cuba, at the beginning of rain period.

A total of 8418 mosquitoes belonging to 16 species were collected in 11 localities of the Isla de la Juventud. The most abundant species was Aedes taeniorhynchus (92% of specimens collected). The species Wyeomyia vanduzeei and Mansonia nigricans were encountered on the island for the first time.

Experimental transmission of Tahyna virus (California group) to wild rabbits (Oryctolagus cuniculus) by mosquitoes.

Two wild rabbits (Oryctolagus cuniculus) were subcutaneously infected with a dose of 2.6 dex. i.

Virological examination of mosquito larvae from southern Moravia.

254 pools of 4,115 mosquito larvae belonging to nine species were examined by isolation experiments. The larvae were collected in breeding places in an inundated forest--a natural focus of Tahyna virus, in April, June and July 1974 and 1975. Tahyna virus was isolated from one pool of 10 Culiseta annulata larvae collected in July 1974.