SEASONAL CHANGES OF THE CHEMICAL COMPOSITION OF RIVER WATERS IN AGRICULTURAL CATCHMENT

The quality of surface water is shaped by a number of processes taking place across the catchment. The dominant role in shaping changes in physico-chemical properties of water play hydrochemical conditions. Detailed characteristics of the aquatic environment is an important aspect in assessing the variability of temporary surface water quality, and the information is necessary for sustainable water management. Therefore, the aim of this study was to investigate the seasonal variability of the chemical composition of water of a small stream in the agricultural landscape in north-eastern Poland. The study included analysis of selected physico-chemical properties of water per year, performing factor analysis in order to identify the processes that shape seasonal changes and the calculation of indicators Markham (index of seasonality and time of concentration). The results found that the physico-chemical properties of water examined watercourse been subject seasonal fluctuations. It indicates the relationship between the content of the individual components dissolved and the size of flow. It was found that in conditions of Polish north-eastern intensive washing and increased levels of nutrients were observed during high water caused by melting snow and rainfall in winter and early spring. Therefore, this period can be critical for the quality of surface water in the agricultural landscape

A Computational Approach to Structure and Reactivity of Boron Containing Reactive Intermediates

Computational chemistry methods were employed to study small boron containing reactive intermediates, such as borylenes, which are the analogs of carbenes and nitrenes, and borirenes and boriranes that are isoelectronic to cyclopropenyl and cyclopropyl cations, respectively. Density functional theory (DFT) was used to study the electronic and molecular structure of various substituted borylenes BR. The influence of substitution on the frontier molecular orbitals (FMO) energies, HOMO-LUMO energy gaps, and singlet-triplet energy splittings was also examined. In addition, two lowest singlet-singlet electronic transitions were computed using equation-of-motion coupled cluster singles and doubles (EOM-CCSD) and time-dependent density functional theory (TD-DFT). The reactivity of singlet borylenes towards unsaturated and saturated hydrocarbons was investigated. To study the mechanisms of the addition and insertion reactions, ethyne, ethene, and methane were chosen as model hydrocarbons. The philicity of borylenes was also studied in terms of geometrical parameters of the transition states calculated for the addition reactions. The aforementioned addition and insertion reactions involve weakly bound van der Waals complexes formed between hydrocarbons and borylenes that correspond to shallow minima on the potential energy surfaces. Spin-component scaled second-order Møller-Plesset perturbation theory (SCS-MP2) was used to study all complexes. Symmetry-adapted perturbation theory (SAPT) analysis was performed to study the nature of the interaction in borylene-hydrocarbon van der Waals complexes. The reactions of three-membered boron heterocycles (borirane and borirene) towards unsaturated hydrocarbons (ethyne and ethene) were investigated. Dimerization reactions of borirenes and boriranes were also studied using DFT and CCSD(T) methods

A 12-year old girl with severe plaque psoriasis and Down syndrome treated successfuly with etanercept

Microsporum (M.) canis is the most common fungus to cause tinea capitis in Europe, especially in the Mediterranean region and South and Central Europe. Fungal scalp infections caused by M. canis tend to be non-inflammatory. Recently, a growing number of cases of tinea capitis characterized by inflammatory infection caused by M. canis and M. gypseum have been registered. We present a case of highly inflammatory tinea capitis, also known as kerion celsi, caused by M. canis in a 6-year-old-patient. Scalp infections due to M. canis are a growing problem in dermatological practice. Changes in epidemiology, etiology, and clinical patterns of fungal infections due to M. canis are significant. Greater awareness of this problem is needed in order to establish proper diagnosis and successful treatment strategy for these patients. </p

A 12-year old girl with severe plaque psoriasis and Down syndrome treated successfuly with etanercept

Microsporum (M.) canis is the most common fungus to cause tinea capitis in Europe, especially in the Mediterranean region and South and Central Europe. Fungal scalp infections caused by M. canis tend to be non-inflammatory. Recently, a growing number of cases of tinea capitis characterized by inflammatory infection caused by M. canis and M. gypseum have been registered. We present a case of highly inflammatory tinea capitis, also known as kerion celsi, caused by M. canis in a 6-year-old-patient. Scalp infections due to M. canis are a growing problem in dermatological practice. Changes in epidemiology, etiology, and clinical patterns of fungal infections due to M. canis are significant. Greater awareness of this problem is needed in order to establish proper diagnosis and successful treatment strategy for these patients. </p

Influence of vegetarian diet on human body

All over the world there are more vegetarians than in previous years due to many reasons. One of them is positive influence on health what is shown in the latest research. The aim of the article is to review the influence of vegetarian diet on frequent diseases such as: hypertension, obesity,osteoporosis.An analysis of scientific papers from Pubmed and Google Scholar was performed, which most accurately described the issue of impact vegetarian diet on human health. The following keywords have been used in the search:Vegetarian, hypertension, obesity, osteoporosis:vegetarian, hypertension, obesity, osteoporosis.The researchers shown than vegetarians have lover systolic blood pressure  and diastolic blood pressure by 10 and 5 mmHg, they also lower overall mortality by 10-15%, risk of heart failure and by ~40%,  stroke by~35% and coronary events by 20%. Vegetarians also have statistically  lower body mass index. What’s more in this diet is more energy efficient thanks too low food energy density and helps keeping leptin on adequate level. Research has shown than vegetarians have lower mineral bone density than non-vegetarian, although some studies has shown that  risk of fractures in vegetarians and non-vegetarians was not affected by diet alternation. Based on the results of the studies above vegetarian diet contributes to lower blood pressure and preventing from cardiovascular diseases. It helps to avoid obesity and  to get rid of weights also doesn’t have negative impact on osteoporosis

The first microsolvation step for furans : new experiments and benchmarking strategies

The site-specific first microsolvation step of furan and some of its derivatives with methanol is explored to benchmark the ability of quantum-chemical methods to describe the structure, energetics, and vibrational spectrum at low temperature. Infrared and microwave spectra in supersonic jet expansions are used to quantify the docking preference and some relevant quantum states of the model complexes. Microwave spectroscopy strictly rules out in-plane docking of methanol as opposed to the top coordination of the aromatic ring. Contrasting comparison strategies, which emphasize either the experimental or the theoretical input, are explored. Within the harmonic approximation, only a few composite computational approaches are able to achieve a satisfactory performance. Deuteration experiments suggest that the harmonic treatment itself is largely justified for the zero-point energy, likely and by design due to the systematic cancellation of important anharmonic contributions between the docking variants. Therefore, discrepancies between experiment and theory for the isomer abundance are tentatively assigned to electronic structure deficiencies, but uncertainties remain on the nuclear dynamics side. Attempts to include anharmonic contributions indicate that for systems of this size, a uniform treatment of anharmonicity with systematically improved performance is not yet in sight