A method is proposed for determining elemental S (So) in organic horizons of forest soils. Elemental sulfur is extracted from the soil with acetone and assayed by a colorimetric method. The procedure is a modification of several existing methods and allows for the extraction of all forms of So. It also reduces the interference of colored extracts from forest litter. The detection limit is 100 m...

Humic substances are a heterogeneous class of moderate molecular weight, yellow-colored biomolecules present in all soils, sediments, and natural waters. Although humic substances are generally resistant to microbial degradation under anaerobic conditions, some microorganisms in soils and sediments can use quinone moieties in humic substances as electron acceptors. Laboratory experiments have s...

Background: Estrogens include estoril (E3), estradiol and estrone (E1). These chemicals are produced in human and animal bodies as well as in synthetic chemicals (drugs). Estrogens can enter water sources in different ways. When these chemicals enter the human body through water and wastewater, they have the ability to mimic or disrupt the normal estrogen activities in humans and animals. Estro...

The new realities of the world Ukrainians were colored in shades black - war russia against Ukraine, treachery neighboring country caused a tsunami pain, losses, confusion and despair.... collection sketches by Ukrainian writer Maryna Skydan are reflections impressions from being inside war, transmitted through perception experiences various beings ray sunshine, wind, city, animals people.

background: estrogens include estoril (e3), estradiol and estrone (e1). these chemicals are produced in human and animal bodies as well as in synthetic chemicals (drugs). estrogens can enter water sources in different ways. when these chemicals enter the human body through water and wastewater, they have the ability to mimic or disrupt the normal estrogen activities in humans and animals. estro...

light, amber and dark colored kernels were rated by eye on a scale of 3 different genotypes (zh1, zh2 and zh3). the oil content was measured using the soxhlet extraction method, ranged from 57.26 to 68.29%, for zh1 (light) and zh2 (amber) respectively. fatty acid compositions were measured using gas chromatography. the main fatty acids were linoleic, oleic and linolenic acids, respectively. als...

secure electronic transaction (set) protocol is an open protocol, which has the potential to emerge as a powerful tool in securing of electronic transactions. the quality of a design of an ecommerce protocols has a great influence on achieving non-functional requirements (nfrs) to the system. an increasingly important non-functional attribute of complex software systems is adaptability. softwar...