scholarly journals Microplastic abundance in beach sediments of the Kiel Fjord, Western Baltic Sea

2021 ◽  
Author(s):  
Kevin Schröder ◽  
Elke Kossel ◽  
Mark Lenz
Keyword(s):  
Baltic Sea ◽  
Chloride Solution ◽  
Calcium Chloride Solution ◽  
Plastic Debris ◽  
Kiel Fjord ◽  
The Third ◽  
Sewage Plant ◽  
Close Proximity ◽  
Beach Sediments ◽  
Beach Use

AbstractWe assessed the abundance of microplastics (0.2–5 mm) in drift line sediments from three sites in Kiel Fjord, Western Baltic Sea. The first site is intensively used by beach visitors, the second is in close proximity to a sewage plant and the third is polluted with large-sized plastic litter. Samples were split into three grain size classes (0.2–0.5, 0.5–1, 1–5 mm), washed with calcium chloride solution, and filtered at 0.2 mm. Filters were then visually inspected, and a total of 180 fragments was classified as microplastics, of which 39% were analyzed using Raman spectroscopy. At the site that is close to a sewage plant as well as at the site with intense beach use, 1.8 and 4.5 particles (fibers plus fragments) per kg of dry sediment were found, respectively, while particle abundances reached 30.2 per kg of dry sediment at the site with high litter loads. Our data suggest that the fragmentation of large plastic debris at site seems to be a relevant source for microplastics in Western Baltic Sea beach sediments.

ACCUMULATION OF PLASTIC FRAGMENTS AND MICROPLASTICS ON THE BEACHES IN THE SOUTH-EAST BALTIC SEA

2017 ◽  
Author(s):  
Lilia Khatmullina ◽  
Lilia Khatmullina ◽  
Elena Esiukova ◽  
Elena Esiukova
Keyword(s):  
Baltic Sea ◽  
Size Range ◽  
Anthropogenic Pollution ◽  
The South ◽  
The Baltic Sea ◽  
Quantitative Distribution ◽  
Sediment Sampling ◽  
Beach Sediments ◽  
Kaliningrad Region ◽  
The Baltic

The sediment sampling from different areas of the beaches in the south-eastern part of the Baltic Sea (in Kaliningrad region) was executed for the purpose of studying the quantitative and qualitative composition of the microplastics particles (range 0.5-5 mm). Preference is given to those beaches that are exposed to maximum anthropogenic pollution. From June, 2015 to January, 2016, there were 14 expeditions along the coastline of the Baltic Sea (in Kaliningrad region) to collect experimental materials. The majority of samples were collected on the most recent flotsam deposited at “wracklines”, in the supralittoral zone. The primary examination of those samples revealed the presence of abundant microplastic particles of the required size range (0.5-5 mm). Quantitative distribution of microplastics in beach sediments was obtained in milligrams per gram of sediment and milligrams per m2: on average 0.05-2.89 (mg per gram of sediment) and 370-7330 (mg per m2), accordingly.

The role of calcium in the increase in flocculence of yeast growing in the presence of copper

1965 ◽  
Vol 162 (989) ◽  
pp. 555-566 ◽  
Keyword(s):  
Liquid Medium ◽  
Cell Cultures ◽  
Chloride Solution ◽  
Liquid Copper ◽  
Acquired Resistance ◽  
Calcium Chloride Solution ◽  
Copper Resistance ◽  
Liquid Cultures ◽  
Selection Of

Growth in the presence of inhibitory concentrations of copper enhances the tendency of yeast to flocculate. Many yeasts will not flocculate unless calcium is included in the growth medium and Guinness strain 522 used in the present work required a relatively large amount. Single cell cultures may undergo variation during subculture, resulting in the production of a large number of variants (Chester 1963). The cells of these variants differ considerably in their ability to adhere together. Flocculation variants of strain 522 differed among themselves in the amount of calcium necessary for flocculation, the most flocculent variants requiring least calcium. Washed cells of the more flocculent yeasts removed more calcium from a calcium chloride solution than did those with lesser powers of adhesion. In a copper medium con­taining calcium the more flocculent variants replaced the less flocculent. Calcium protected cells from copper and the more flocculent variants enjoyed most protection. All variants acquired resistance to copper during growth in the copper medium. Despite the selection of the more flocculent yeasts during growth in liquid medium, their copper resistance was less than that of the less flocculent yeasts. When calcium was added to the liquid copper medium, cultures developed less resistance. It is concluded that the less flocculent cells, having less protection by calcium, were exposed to what was effectively a greater concentration of copper and therefore became more resistant. This greater resistance did not enable these cells to compete with the flocculent cells in liquid cultures.

scholarly journals The formation of lactic acid in desiccated amphibian muscles

1930 ◽  
Vol 106 (742) ◽  
pp. 122-131 ◽  
Keyword(s):  
Lactic Acid ◽  
Chloride Solution ◽  
Sartorius Muscle ◽  
Silk Thread ◽  
Experimental Procedure ◽  
The Third ◽  
Uniform State ◽  
Cent Sodium ◽  
Geometrical Form ◽  
Determining Factor

The present paper is the third of a series dealing with the effects of freezing and drying on living amphibian muscle (1, 2). In this paper it is shown that simple drying of muscles causes the production of lactic acid, in amount identical with that produced by the corresponding degree of freezing (2). This finding confirms the view expressed in the earlier communications that the effects of freezing and drying are identical, the determining factor in each case being the removal from the muscle of a certain amount of water. Experimental Procedure . To ensure even drying throughout, it was necessary to use a thin muscle of regular geometrical form. The sartorius muscle of the frog was therefore chosen. The frogs were precooled for some hours at zero. The muscles were then carefully removed at their insertions, wiped on filter paper, and each individual muscle suspended by a silk thread of known weight (see later) in a stoppered bottle, over 0·72 per cent, sodium chloride solution. After standing at 0° C. for 24 hours, to allow of the removal of the lactic acid formed during the manipulation, the muscles were weighed, and rapidly dried by being suspended in bottles over solid calcium chloride. It has already been shown that this method of drying produces a uniform state throughout the muscle (1, p. 187). They were removed at intervals for weighing.

Contacts and Networks in the Baltic Sea Region

2019 ◽  
Keyword(s):  
Baltic Sea ◽  
Final Section ◽  
Religious Studies ◽  
The Baltic Sea ◽  
Cultural Goods ◽  
The Third ◽  
Baltic Sea Region ◽  
The World ◽  
History Of ◽  
The Baltic

Since prehistoric times, the Baltic Sea has functioned as a northern mare nostrum — a crucial nexus that has shaped the languages, folklore, religions, literature, technology, and identities of the Germanic, Finnic, Sámi, Baltic, and Slavic peoples. This anthology explores the networks among those peoples. The contributions to Contacts and Networks in the Baltic Sea Region: Austmarr as a Northern mare nostrum, ca. 500-1500 ad address different aspects of cultural contacts around and across the Baltic from the perspectives of history, archaeology, linguistics, literary studies, religious studies, and folklore. The introduction offers a general overview of crosscultural contacts in the Baltic Sea region as a framework for contextualizing the volume’s twelve chapters, organized in four sections. The first section concerns geographical conceptions as revealed in Old Norse and in classical texts through place names, terms of direction, and geographical descriptions. The second section discusses the movement of cultural goods and persons in connection with elite mobility, the slave trade, and rune-carving practice. The third section turns to the history of language contacts and influences, using examples of Finnic names in runic inscriptions and Low German loanwords in Finnish. The final section analyzes intercultural connections related to mythology and religion spanning Baltic, Finnic, Germanic, and Sámi cultures. Together these diverse articles present a dynamic picture of this distinctive part of the world.

Treatment of sepsis with calcium salts. Professor Petrov (V. Chir. and Pogr. Obl., Vol. I, No. 2), Chistyakov (Nov. Chir. Arch., Vol. II, No. 1)

1923 ◽  
Vol 19 (2) ◽  
pp. 100-100
Author(s):  
V. Bogolyubov
Keyword(s):  
Calcium Chloride ◽  
Chloride Solution ◽  
Calcium Chloride Solution ◽  
Calcium Salts ◽  
Intravenous Infusions ◽  
Surgical Methods

The author warmly recommends treatment of sepsis with intravenous infusions of 1% calcium chloride solution (the method first proposed by Prof. Aleksinski). Although this method does not seem sufficiently theoretically justified, nevertheless P., on the basis of his observations, advises to resort to intravenous infusions of 1% solution of crystalline calcium chloride at 250-400 cfu for acute and subacute forms of sepsis where the well-known surgical methods of dissection and removal of infected nidi have been carried to completion and have not put the patient on the path to recovery.

Studying on Preperation and Emulsifying Properties of Silk Protein Calcium Salt Made from Waste Silk

2011 ◽  
Vol 197-198 ◽  
pp. 60-64 ◽  
Author(s):  
Jun Sheng Li ◽  
Hai Tao Cheng
Keyword(s):  
Aqueous Solution ◽  
Calcium Chloride ◽  
Salt Solution ◽  
Chloride Solution ◽  
Calcium Salt ◽  
Calcium Chloride Solution ◽  
Silk Protein ◽  
Emulsifying Properties ◽  
Emulsification Capacity ◽  
New Protein

One key step for silk protein further uses is to let them be dissolved in aqueous solution. However, the silk protein is usually not soluble in aqueous solution. Silk protein dissolved in calcium chloride solution is one of the few effective ways. Silk fibroin was well dissolved in 15-20min. in boiling calcium chloride solution [50% (w/v)] with the ratio of 15g dry waste silk per100mL calcium chloride solution. After dialysis, silk protein calcium salt unexpectedly showed excellent emulsification capacity and stability. Only 0.8-1.2% of silk protein calcium salt solution (50mL) could let 50mL soybean salad oil be mixed and emulsified well. Silk protein calcium salt may be used as a new protein-based surfactant.

Longitudinal distribution of applied calcium, and of naturally occurring calcium, magnesium, and potassium, in Merton apple fruits

1973 ◽  
Vol 24 (3) ◽  
pp. 363 ◽  
Author(s):  
TL Lewis ◽  
D Martin
Keyword(s):  
Calcium Chloride ◽  
Chloride Solution ◽  
Relative Effectiveness ◽  
Calcium Chloride Solution ◽  
Magnesium Concentration ◽  
Longitudinal Distribution ◽  
Time Of Application ◽  
Naturally Occurring ◽  
Bitter Pit ◽  
Apple Fruits

When 45Ca-labelled calcium chloride solution was applied to the skin of young developing Merton apple fruits, activity in the cortex at maturity was highest in the calyx end region where bitter pit lesions most commonly develop. Fruit age at time of application affected the amount of labelled calcium absorbed but not its longitudinal distribution. Following branch injection of labelled calcium chloride solution 8 weeks before harvest, activity in mature fruits was found mostly in the stem end. Leaves and buds accounted for 95% of the recovered activity, and the fruits for 5%, of which about one-quarter was in the calyx half. The same distribution pattern was found following injection of labelled calcium chloride solution into the fruit stem. The concentration of naturally occurring calcium in the cortex of the mature fruit declined steadily from stem end to calyx end. On the other hand, the magnesium concentration was lowest near the stem end and highest at the calyx end. The potassium concentration remained fairly constant along most of the length of the fruit, with a small increase at each end. The findings are discussed with regard to the longitudinal gradient in bitter pit susceptibility within apple fruits, and to the relative effectiveness of tree sprays of calcium, as compared with soil applications, in the control of the disorder. Results suggest that calcium does not have a trace element role in the control of bitter pit.

Effect of immersion time of restorative glass ionomer cements and immersion duration in calcium chloride solution on surface hardness

2014 ◽  
Vol 30 (12) ◽  
pp. e377-e383 ◽  
Author(s):  
Maho Shiozawa ◽  
Hidekazu Takahashi ◽  
Naohiko Iwasaki ◽  
Takahiro Wada ◽  
Motohiro Uo
Keyword(s):  
Calcium Chloride ◽  
Chloride Solution ◽  
Immersion Time ◽  
Surface Hardness ◽  
Calcium Chloride Solution ◽  
Glass Ionomer Cements ◽  
Glass Ionomer
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