In this work a novel method for synthesis of 1,8-dihydroxynaphthalene melanin was presented, as well the physicochemical properties, molecular structure, and characteristics pigment. The proposed protocol is simple cost-effective with no enzymes or catalysts needed. final product not adsorbed on any surface, since pigment result autooxidation 1,8-dihydroxynaphthalene. Performed analyses revealed that solubility, optical paramagnetic properties are typical melanins, in EPR spectra an unusual...

The article attempts to assess the usefulness of Taguchi method optimise purification process synthetic textile wastewater (pH 6.7 - 7.2, Conductivity = 6.71 6.84 mS/cm, Salinity 3581 3648 mg NaCl/l, Colour 560 4710 Pt/l, COD 2220 2290 O2/l, TOC 394 551 mg/l) using K2FeO4. research was conducted 3 types containing anionic detergent (sodium lauryl sulfate, 100 and differing only in concentration azo dye Acid Green 16 (AG 16). Technical K2FeO4 used as an oxidiser, which subjected...

Plants have developed various acclimation strategies in order to counteract the negative effects of abiotic stresses (including temperature stress), and biological membranes are important elements these strategies. Brassinosteroids (BR) plant steroid hormones that regulate growth development modulate their reaction against many environmental including stress, but role modifying properties membrane is poorly known. In this paper, we characterise molecular dynamics chloroplast had been...

The study investigated compounds present in the invasive grass Hordeum murinum L. subsp. and tested allelopathic potential of this plant against common meadow species Festuca rubra Trifolium repens Gas chromatography–mass spectrometry (GC–MS) performed separately on ears stalks with leaves wall barley revealed 32 compounds, including secondary metabolites, that may play an important role allelopathy. Two N-butylbenzenesulfonamide (NBBS) diphenylsulfone (DDS), were described for first time...

Gene encoding mercuric ion reductase, merA is a crucial component of the mer operon for reduction nonorganic mercury ions into less toxic form. The gene or its fragments are commonly used as molecular marker bacterial resistance to mercury. In this study, it was tested whether can be considered resistance. For purpose, presence in bacteria isolated from microbiota Tussilago farfara L. growing post-industrial mercury-contaminated and non-contaminated areas verified by identification. Mercury...

The article compares the classic Fenton reagent (Fe2+/H2O2) with its modification zero-valent iron (ZVI/H2O2) to remove azo dye Acid Red 27 from aqueous solutions at a concentration of 100 mg/L. For both methods, most favorable parameter values ​​were determined which visual discoloration tested was obtained (for Fe2+/H2O2:pH 3.5, H2O2=60 mg/L, Fe2+/H2O2=0.3, t=15 min, and for ZVI/H2O2: pH 3, H2O2=40 ZVI=80 min). Under these conditions, COD value reduced by 71.5% 69.2% modification,...

Flax, Linum usitatissimum, cultivars are grown throughout the world. Flax oil is a dietary source of polyunsaturated fatty acids, vitamin E, as well phospholipids, sterols, and phenolic acids. Linseed plays pivotal role in protecting cells from oxidative damage associated diseases, i.e., atherosclerosis, neurodegenerative disorders, cancer, inflammation. In this study, two groups L. usitatissimum seeds were used to evaluate compare content composition tocochromanols (vitamin E) Group I...

New bacterial strains resistant to high concentration of mercury were obtained and character iz ed focusing on their potential application in bioremediation. The biological material was isolated from soil contaminated with mercury. ability removal Hg the liquid medium effect various pH concentrations environment growth kinetics tested. selected identified by analysis 16S ribosome subunit coding sequenc es as Pseudomonas syringae. microbial metabolism demonstrated that P. syringae is able...

The greenhouse effect results in warming the planet's surface and a higher ocean heat content.It causes changes of water circulation frequency turbulent mixing, delivering warm water, phytoplankton nutrients CO2 from deeper layers to surface.All these can have an impact on Earth's ecosystems.In present study changing environmental temperature model diatom species, Thalassiosira pseudonana was tested under laboratory conditions.The purpose work analyze fluidity chemical composition thylakoid...

The article presents the possibility of using potassium ferrate(VI) (K2FeO4) to remove dyes (Acid Red 27, Reactive Black 5, Acid Green 16) belonging single azo, double azo and triarylmethane classes from aqueous solutions with an initial concentration 100 mg/l (Chemical Oxygen Demand (COD) values for AR27, RB5 AG16 sulutions were 172, 156 198 mg O2/l, respectively). For most favorable oxidation parameters AR27 (pH 7, K2FeO4 concentration, 180 240 mg/l, respectively, reaction time 10 min),...

During coal combustion soot formation is unwanted. There are many fuel additives used to reduce production. In this study toxicity and biodegradation of three types by two soil bacteria strains i.e. Pseudomonas aeruginosa Bacillus subtilis were compared. Two selected produce samples: (i) commonly containing significant quantities NaCl (40–44%) copper (Cu-additive), (ii) newly developed without with triiron tetraoxide instead (Feadditive). Average number bacterial colonies was similar when...

The history of fuel additive use reflects the interplay between chemistry, technology and public health concerns related to environmental effects. Decisions specific type chemical modification during combustion process have been made in absence toxicological data on effects or exposure. influence these important issues has extended globally, various compositions impact for decades after removal compounds. Fuel modifications are widely used petrol, oil solid fuels. According market screening...

Tarnów is a city where air pollution major problem during the wintertime. An acceptable level of PM2.5 and PM10 concentrations are exceeded very often. The main reason this situation individual housing their heat system based on ineffective old units hard coal sometimes even people use waste as fuel. has two quality monitoring stations private network for measurements particulate matter. However, there still lack information in some areas city. For obtaining full Tarnów, readings from...

This is a short review on the increasing problem of pharmaceutical pollution in surface waters. Non-steroidal anti-inflammatory drugs (NSAIDs) are medicines that widely used to relieve pain, reduce inflammation, and high body temperature. The paper presents literature content NASIDs Due continuous growth world's population use pharmaceuticals, threat aquatic ecosystems increasing. Every day, huge loads discharged into rivers seas. Depending technology effectiveness wastewater treatment...

Household waste is a global problem that many countries cannot cope with and deal difficulty. In regions of the world, dynamic increase in amount generated observed, which causes significant environmental pollution excessive use non-renewable resources. case household waste, important indicators are not only its quantity per person but also morphology. This study compares morphology by Sri Lanka (Colombo) Poland (Tarnów). The presented data comes from 2022, during time economic crisis caused...

The new technology of polylactide (PLA) production using starch as an additive compound was developed in order to reduce costs the process.Two different PLA samples were obtained: with 20% and 50% concentrations.The comparative analysis modified unmodified biodegradation is presented.PLA film content cut small square-shaped pieces.The disinfected, weighed under sterile conditions placed on agar plate mineral medium.Samples treated two species molds, i.e.Aspergillus niger Penicillium...