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Journal articles on the topic 'Sedimentation'

Author: Grafiati

Published: 4 June 2021

Last updated: 16 November 2024

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1

Geniusas, Saulius. "Merleau-Ponty’s Phenomenology of Sedimentations." Journal of Phenomenological Psychology 54, no. 2 (November 28, 2023): 155–77. http://dx.doi.org/10.1163/15691624-20231422.

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Abstract The paper explores the meaning of the phenomenological concept of sedimentation in the framework of Merleau-Ponty’s phenomenology. The analysis I offer suggests that Merleau-Ponty initiates a transition from the constitutional problematic of sedimentations that we come across in Husserl’s phenomenology to the analysis of existential sedimentations. Merleau-Ponty accomplishes this transformation by binding the Husserlian conception of sedimentations with the Heideggerian conception of facticity. The distinction Merleau-Ponty draws between originary sedimentations and secondary sedimentations is especially important, for it allows one to claim that Merleau-Ponty recognizes all experiences as sedimented. Against the background of this realization, I offer a reevaluation of Merleau-Ponty’s cryptic remarks in the Phenomenology of Perception regarding the “original past,” also described as “a past that has never been a present.” I argue that these are metaphors for originary sedimentations. In place of a conclusion, I suggest that especially when the concept of sedimentation is universalized, we come to recognize its inherently paradoxical nature. In the final analysis, besides being a genetic concept, sedimentation is also a limit problem and a limit phenomenon.

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2

Rodriguez-Lopez, Patricia, Antonio Gutierrez-Lavin, Manuel M. Mahamud-Lopez, and Julio L. Bueno de las Heras. "New Developments in Sedimentation and Sedimentator Design." Recent Patents on Chemical Engineeringe 3, no. 2 (June 1, 2010): 129–41. http://dx.doi.org/10.2174/2211334711003020129.

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3

Rodriguez-Lopez, Patricia, Antonio Gutierrez-Lavin, Manuel M. Mahamud-Lopez, and Julio L. Bueno de las Heras. "New Developments in Sedimentation and Sedimentator Design." Recent Patents on Chemical Engineering 3, no. 2 (May 14, 2010): 129–41. http://dx.doi.org/10.2174/1874478811003020129.

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4

Maric, Filip, Margherita Poto, and Giuliana Panieri. "Sedimentation." Septentrio Educational, no. 1 (April 28, 2023): 94–97. http://dx.doi.org/10.7557/8.7061.

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Focus: To understand the role of sedimentation in creating the unique conditions of ocean floor ecosystems. Learning objectives: With this activity, pupils will gain a basic understanding of how sediments in the ocean settle on the ocean floor (sedimentation) and what this looks like. Key words: Settling, sediment, terrigenous, pelagic.

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5

Talkers, Ralph. "Erythrocyte Sedimentation Rate/Zeta Sedimentation Rate." Emergency Medicine Clinics of North America 4, no. 1 (February 1986): 87–93. http://dx.doi.org/10.1016/s0733-8627(20)30984-6.

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6

McCann, Tom. "Tectonics & Sedimentation." Zeitschrift der Deutschen Gesellschaft für Geowissenschaften 162, no. 2 (June 1, 2011): 91–92. http://dx.doi.org/10.1127/1860-1804/2011/0162-0091.

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7

Jonkus, Dalius. "Kultūros krizė ir fenomenologinė sedimentacijos samprata E. Husserlio filosofijoje." Problemos 105 (April 10, 2024): 74–87. http://dx.doi.org/10.15388/problemos.2024.105.6.

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Husserl names the dynamics of cultural objectifications with the term sedimentation, which includes the formulation of the discovered meaning in material sensory expressions and the reactivation of these passively existing meanings. This paper analyzes this concept of sedimentation and places it in the context of Husserl’s thoughts on the crisis of culture. Unlike the usual interpretations of Husserl’s philosophy of culture which state that the crisis of sciences arises from the inadequacy of their ‘scientificity’ and inability to solve the problems of the meaning of life, I argue that the crisis can be understood as the result of the duality of sedimentation. Sedimentations not only preserve knowledge, but also create the illusion that knowledge reproduces itself. When reflecting on the crisis of culture, Husserl turns from theoretical philosophy to practical philosophy.

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8

Eijsbouts, Tom. "Constitutional Sedimentation." Legal Issues of Economic Integration 23, Issue 1 (June 1, 1996): 51–60. http://dx.doi.org/10.54648/leie1996003.

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9

Huron, Samuel, Romain Vuillemot, and Jean-Daniel Fekete. "Visual Sedimentation." IEEE Transactions on Visualization and Computer Graphics 19, no. 12 (December 2013): 2446–55. http://dx.doi.org/10.1109/tvcg.2013.227.

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10

BRENCHLEY, PATRICK J. "Storm sedimentation." Geology Today 5, no. 4 (July 1989): 133–37. http://dx.doi.org/10.1111/j.1365-2451.1989.tb00645.x.

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11

Schleiss, Anton J., Mário J. Franca, Carmelo Juez, and Giovanni De Cesare. "Reservoir sedimentation." Journal of Hydraulic Research 54, no. 6 (September 20, 2016): 595–614. http://dx.doi.org/10.1080/00221686.2016.1225320.

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12

Ruckenstein, E. "Sedimentation polymerization." Polymer 36, no. 14 (1995): 2857–60. http://dx.doi.org/10.1016/0032-3861(95)93669-d.

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13

Allen, P. A., and C. J. Pound. "Storm sedimentation." Journal of the Geological Society 142, no. 2 (March 1985): 411–12. http://dx.doi.org/10.1144/gsjgs.142.2.0411.

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14

Nash, David J. "Alluvial sedimentation." Sedimentary Geology 92, no. 3-4 (September 1994): 296–97. http://dx.doi.org/10.1016/0037-0738(94)90117-1.

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15

Wicks, Ian. "Sedimentation Rate." JAMA 317, no. 11 (March 21, 2017): 1180. http://dx.doi.org/10.1001/jama.2016.18399.

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16

Omland, T. H., H. Hodne, A. Saasen, S. Mjølhus, and P. A. Amundsen. "Drilling Fluid Weight Material Sedimentation—Sedimentation of Suspensions." Petroleum Science and Technology 31, no. 18 (September 17, 2013): 1908–15. http://dx.doi.org/10.1080/10916466.2010.489085.

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17

Jung, Silvano. "Trample damage of stone flakes as an index of occupation intensity: a case study from Magnificent Gallery." Queensland Archaeological Research 9 (December 1, 1992): 26. http://dx.doi.org/10.25120/qar.9.1992.106.

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A comparative index of trampling intensity was used in the analysis of the stone artefact assemblage at Magnificent Gallery (southeast Cape York Peninsula, Northern Queensland), to take into account the inter-related processes of flake breakage and sedimentation.Â This demonstrated a late decrease in the proportion of broken flakes, which largely reflected associated increases in sedimentation rates, rather than decreased occupational intensity.Â The analysis took into account the inverse relationship between sedimentation rate and frequency of flake breakage.Â the results indicate that people may have visited the site more frequently and/or for longer periods in the past 1,000 years.

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18

Winarto, Nigel Geraldi, Joko Sujono, and Bambang Agus Kironoto. "Sediment Transport Modeling in The Katingan I Tidal Irrigation, Central Kalimantan." E3S Web of Conferences 576 (2024): 03004. http://dx.doi.org/10.1051/e3sconf/202457603004.

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The utilization of swamp land as productive rice fields is to support national food security and the local economy. One of which is carried out through the Katingan I tidal swamp irrigation rehabilitation project. In the Katingan I tidal swamp irrigation area, sedimentation problems occurred in the channels. The Sedimentation reduces the water flow capacity in primary and secondary canals as a water supply for agricultural fields which can have an impact on decreasing paddy production. This study was conducted to model sediment using HEC-RAS 6.4.1 software and to identify the areas affected by sedimentation in the Katingan I tidal swamp irrigation canals. Data collection methods included direct observation of tidal heights over a one-month observation period on the Katingan River. The study results show that the lower right primary canal 13 (PBKn 13) has the highest sediment volume and the invert channel increased by 1.81 % per month. The recommendations to address the issue include rehabilitation and normalization of the canal to control the impact of sedimentations.

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19

Sorrosa, Joy, Janeth Tayone, Wilanfranco Tayone, Ariel Eballe, Bernadette Nanual, and Ivan Saligumba. "Sediment Accumulation Rates in Pujada Bay as Determined by Sediment Traps." Davao Research Journal 11, no. 1 (December 15, 2015): 13–18. http://dx.doi.org/10.59120/drj.v11i1.17.

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Sedimentation rates in Pujada Bay were determined using an improvised container traps to collect sediments at eight different stations. The results showed high sedimentation rates of around 21.74 kg ma day-I, 15.43 kg ma day-I, 8.21 kg ma day-I, and 3.20 kg ma day-I in stations S5R2 (first period), S2R2 (fourth sampling S2R2 sampling period), and S3R1 (second sampling period) respectively. The principal source for S5R2 was the nearby upland water run-off from the mountain where soil extraction activities are obvious. Depositions for S2R2 were due to Mati Creek discharge and presence of informal settlers in the vicinity. Sedimentations in S3R1 were due to Sudlon River discharge and presence of large commercial fishing boats in the area.

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20

Keping, Wang. "Art as Sedimentation." Journal of Chinese Philosophy 37, no. 1 (February 19, 2010): 131–38. http://dx.doi.org/10.1163/15406253-03701011.

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21

Bhatnagar, D. K. "Sedimentation Pond Design." Journal American Society of Mining and Reclamation 1992, no. 1 (1992): 664–70. http://dx.doi.org/10.21000/jasmr92010664.

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22

Golosov, V. N. "River sedimentation symposium." Geomorphology RAS, no. 3 (June 30, 2015): 107. http://dx.doi.org/10.15356/0435-4281-2008-3-107-108.

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23

Plebani, Mario, and Elisa Piva. "Erythrocyte Sedimentation Rate." American Journal of Clinical Pathology 117, no. 4 (April 2002): 621–26. http://dx.doi.org/10.1309/qb1g-6frr-dnwx-bkq9.

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24

Nelson, Jonathan. "Erosion and Sedimentation." Eos, Transactions American Geophysical Union 80, no. 15 (1999): 176. http://dx.doi.org/10.1029/99eo00128.

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25

WANG, KEPING. "ART AS SEDIMENTATION." Journal of Chinese Philosophy 37, no. 1 (March 2010): 131–38. http://dx.doi.org/10.1111/j.1540-6253.2009.01569.x.

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26

Dalrymple, Robert A. "Erosion and sedimentation." Ocean & Coastal Management 26, no. 3 (January 1995): 261–62. http://dx.doi.org/10.1016/0964-5691(95)90006-3.

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27

Benjamin Robins, E., Abdul J. Khan, Tasser Atrak, and Emma Torrijos. "Erythrocyte Sedimentation Rate." Clinical Pediatrics 32, no. 11 (November 1993): 681–83. http://dx.doi.org/10.1177/000992289303201107.

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28

Maslak, P. "Erythrocyte Sedimentation Rate." ASH Image Bank 2005, no. 0131 (January 31, 2005): 101282. http://dx.doi.org/10.1182/ashimagebank-2005-101282.

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29

JONES, K. A. "Erosion and Sedimentation." Environmental & Engineering Geoscience I, no. 4 (December 1, 1995): 532–33. http://dx.doi.org/10.2113/gseegeosci.i.4.532.

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30

PICKERING, K. T. "Tectonics and Sedimentation." Journal of the Geological Society 148, no. 2 (March 1991): 315–16. http://dx.doi.org/10.1144/gsjgs.148.2.0315.

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31

Quick, M. C. "Erosion and sedimentation." Canadian Journal of Civil Engineering 23, no. 1 (February 1, 1996): 312–13. http://dx.doi.org/10.1139/l96-036.

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32

Finkl, Charles W. "Glacial-Marine Sedimentation." Sedimentary Geology 45, no. 3-4 (November 1985): 315–16. http://dx.doi.org/10.1016/0037-0738(85)90008-9.

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33

Gao, Shu. "Erosion and sedimentation." Sedimentary Geology 105, no. 1-2 (August 1996): 106–7. http://dx.doi.org/10.1016/0037-0738(95)00097-6.

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34

Felderhof, B. U. "Sedimentation in Suspensions." Berichte der Bunsengesellschaft für physikalische Chemie 94, no. 3 (March 1990): 222–24. http://dx.doi.org/10.1002/bbpc.19900940305.

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35

Hrudka, Jaroslav, Štefan Stanko, and Michal Holubec. "Analysis of flow and sedimentation processes in secondary sedimentation tank." Pollack Periodica 12, no. 2 (August 2017): 79–89. http://dx.doi.org/10.1556/606.2017.12.2.7.

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36

Miyazaki, Yozo, and Sotoaki Onishi. "The Yearly Changes in Reservoir Sedimentation and the Specific Sedimentation." Doboku Gakkai Ronbunshu, no. 497 (1994): 81–90. http://dx.doi.org/10.2208/jscej.1994.497_81.

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37

Maric, Filip, Margherita Paola Poto, Giuliana Panieri, and Olena Peftieva. "Седиментація." Septentrio Educational, no. 3 (November 17, 2023): 90–93. http://dx.doi.org/10.7557/8.7256.

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Фокусуємося на: розумінні ролі седиментації у створенні унікальних умов екосистем океанічного дна. Мета навчання: Завдяки цій вправі учні отримають базове розуміння того, як осади в океані опускаються на дно (седиментація) і як це виглядає. Ключові слова: Осади, осадові породи, теригенні, пелагічні

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38

Li, Lin, Xian Jun Lu, Jun Qiu, and Peng Li. "The Experimental Research on the Sedimentation Performance of one Molybdenum Ore Flotation Tailings." Advanced Materials Research 361-363 (October 2011): 343–45. http://dx.doi.org/10.4028/www.scientific.net/amr.361-363.343.

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This paper adopts sedimentation experiment to study the sedimentation process of one molybdenum ore flotation tailings and to investigate the effects of lime and sodium silicate on sedimentation performance of tailings. Through the experiment on sedimentation speed and compressive layer density, it reveals the sedimentation performance rules of these tailings. Meanwhile, it explores the effects of lime and sodium silicate on sedimentation dry beach of tailings. The research shows that: lime could effectively ameliorate the non-easy sedimentation caused by sodium silicate; when the dosage of sodium silicate is 300～800g/t, the sedimentation performance can reach the best reasonable pH value 9-10. Besides, the study also indicates that both sodium silicate and lime are unfavorable to form sedimentation dry beach by tailings of concentrating mill.

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39

Obukhova, M. V., E. I. Vialkova, L. V. Belova, A. M. Fugaeva, E. S. Korshikova, and A. D. Lapina. "Microwave Radiation in Wastewater Treatment and Sedimentations Treatment Technologies." Ecology and Industry of Russia 28, no. 7 (July 24, 2024): 4–9. http://dx.doi.org/10.18412/1816-0395-2024-7-4-9.

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The main results of research on the use of microwave radiation in wastewater treatment and treatment of their sedimentations, as well as water treatment waste, are presented. The thermal influence of microwaves on the water and sedimentations properties is considered. The experimental data obtained by foreign and domestic specialists for the following processes using microwaves are shown: degradation of organic substances, de-emulsification of oil-containing wastewater, removal of metals, disinfection, intensification of biogas yield, sediments pyrolysis, modification of the absorbents, intensification of compaction and dewatering of natural water treatment sedimentation. New microwave equipment for treatment the various wastes is described.

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40

Yamamoto, Tetsuya, and Hideto Yoshida. "Particle Size Distribution Analysis by Sedimentation Distance Measurement in Sedimentation Tube." Journal of the Society of Powder Technology, Japan 56, no. 2 (February 10, 2019): 66–73. http://dx.doi.org/10.4164/sptj.56.66.

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41

Fukui, Kunihiro, Hideto Yoshida, Mitsuya Shiba, and Yuusuke Tokunaga. "Investigation about Data Reduction and Sedimentation Distance of Sedimentation Balance Method." JOURNAL OF CHEMICAL ENGINEERING OF JAPAN 33, no. 3 (2000): 393–99. http://dx.doi.org/10.1252/jcej.33.393.

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42

Neill, L., and M. Ivan. "Comparison of methods for isolation of protozoa from ruminal fluid." Canadian Journal of Animal Science 76, no. 3 (September 1, 1996): 481–83. http://dx.doi.org/10.4141/cjas96-073.

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Isolation of protozoa from ruminal fluid taken from the same cow on five different days was carried out by three methods based on sedimentaton or on filtration using 10-μm mesh (PMB-10) or 20-μm mesh (PMB-20) polyester monofilament bags. Differences among means for percentage recoveries of protozoal numbers for the three isolation methods were statistically significant (P = 0.007), but those for dry matter and diaminopimelic acid (DAPA) recoveries were not (P > 0.1). The sedimentation method produced the lowest recovery of protozoa as well as the highest recovery of DAPA, which indicated the highest bacterial contamination. Among the filtration-based methods PMB-10 produced higher recoveries of protozoal numbers and dry matter than PMB-20, but with somewhat larger bacterial contamination. Among the three methods compared, filtration with PMB-10 was considered as the most suitable. Key words: Ruminal fluid, protozoal isolation, sedimentation, filtration

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43

Wu, Zhangkai, Sebastian Romuli, Kiatkamjon Intani, and Joachim Müller. "Investigating Crude Sesame Oil Sedimentation and Its Monitoring Using Laser Backscattering Imaging (LBI)." Applied Sciences 13, no. 15 (August 7, 2023): 9013. http://dx.doi.org/10.3390/app13159013.

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Sesame oil is a food and energy resource that is not used enough. Sedimentation of crude oil after pressing can remove particles and happens regardless of the producer’s intention. However, sedimentation of crude plant oil and its sensing technology are rarely studied. This research studied crude sesame oil sedimentation and monitored it with low-cost laser backscattering imaging (LBI). In the discontinuous measurement, a 30-day sedimentation was conducted with oil samples sent to the lab LBI system for image capture. A scattering spot and an increasing Tyndall effect along the light path were seen. In the continuous measurement, an LBI system was mounted on a sedimentation tank for 30 days. The sedimentation curve, scattering images, and oil properties were checked. The sedimentation speed was about −7 mm/h, then less than −2 mm/h. The image features correlated well with the sedimentation interface height (R2 = 0.97) when the height was above −100 mm. The oil-particle-related properties (ash content, phosphorus content, carbon residue, and total contamination) dropped by at least 87%, water content decreased by 90%, and the oxidation-related properties (oxidation stability, γ-tocotrienol, δ-tocopherol, γ-tocopherol, and acid value) changed less significantly. The crude sesame oil sedimentation had two stages: diluted and hindered sedimentation. This research can help improve sedimentation tank and LBI system design and prevent unwanted sedimentation.

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44

Hrušková, M., V. Škodová, and J. Blažek. "Wheat sedimentation values and falling number." Czech Journal of Food Sciences 22, No. 2 (November 16, 2011): 51–57. http://dx.doi.org/10.17221/3406-cjfs.

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Technological quality of wheat from 2001 and 2002 harvests and its changes in the course of one-year storage were evaluated using protein content, SDS and Zeleny tests and falling number. Average values from the analyses of ten partial samples that were taken from five Central Bohemian producers (beet-producing region) during the period of eleven months (from October to August) characterise wheat standard quality for the mill processing and it is possible to explain their variations by the effect of the harvest year in the comparable wheat variety composition. With regard to similar climatic conditions of the years 2001 and 2002, there were not found any marked differences in protein content (2001 – average 12.4%, 2002 – average 12.8%) and Zeleny test (2001 – average 52 ml, 2002 – average 55 ml) but the falling number was significantly different (2001 – average 321 s, 2002 – average 287 s). During the storage time in agricultural operations no conclusive changes in protein content were found though protein quality slightly decreased according to the SDS and Zeleny test values. Falling number values of wheat from 2001 harvest slightly increased, which was not evidential for the set of samples from 2002. Statistically significant correlations were calculated between the falling number value of wheat and its laboratory-manufactured flour in both harvest years (r = 0.556 in 2001, r = 0.825 in 2002). The value of Zeleny test significantly correlates with SDS test (r = 0.531 in 2001, r = 0.787 in 2002) as well as with protein content

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45

Jiang, Lin Ling, Wei Mo, Xiao Jing Yang, Tian Li Xue, and Shao Jian Ma. "Effect on Sedimentation Characteristics of Bentonite Suspension at Different Conditions." Applied Mechanics and Materials 333-335 (July 2013): 2004–9. http://dx.doi.org/10.4028/www.scientific.net/amm.333-335.2004.

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To better understand the sedimentation processes of bentonite, the sedimentation characteristic of bentonite suspension was studied by using the sedimentation analysis module of Dynamic Contact Angle Meter and Tensiometer. The results indicated that sedimentation characteristics of bentonite suspension were affected by the concentration and pH values of the suspension together with the dosage of dispersants. The natural sedimentation rates of bentonite suspension declined firstly with prolonging the sedimentation time and soon stabilized after about 50s. The sedimentation weight of particles hardly changed when the concentration ranged from 0.5% to 5.0%, while it increased significantly when ranged from 5.0% to 10.0%. The sedimentation weight and rate were relatively bigger at 4.4, 11.8 than that of 6.0, 7.9, and the maximum values appeared at pH11.8. Adding sodium pyrophosphate could improve the dispersibility of bentonite suspension.

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46

Wolodko, William T., Cyril M. Kay, and William A. Bridger. "Active enzyme sedimentation, sedimentation velocity, and sedimentation equilibrium studies of succinyl-CoA synthetases of porcine heart and Escherichia coli." Biochemistry 25, no. 19 (September 23, 1986): 5420–25. http://dx.doi.org/10.1021/bi00367a012.

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47

Belzunces, L. P., J. P. Toutant, and M. Bounias. "Acetylcholinesterase from Apis mellifera head. Evidence for amphiphilic and hydrophilic forms characterized by Triton X-114 phase separation." Biochemical Journal 255, no. 2 (October 15, 1988): 463–70. http://dx.doi.org/10.1042/bj2550463.

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The polymorphism of bee acetylcholinesterase was studied by sucrose-gradient-sedimentation analysis and non-denaturing electrophoretic analysis of fresh extracts. Lubrol-containing extracts exhibited only one form, which sedimented at 5 S when analysed on high-salt Lubrol-containing gradients and 6 S when analysed on low-salt Lubrol-containing gradients. The 5 S/6 S form aggregated upon removal of the detergent when sedimented on detergent-free gradients and was recovered in the detergent phase after Triton X-114 phase separation. Thus the 5 S/6 S enzyme corresponds to an amphiphilic acetylcholinesterase form. In detergent-free extracts three forms, whose apparent sedimentation coefficients are 14 S, 11 S and 7 S, were observed when sedimentations were performed on detergent-free gradients. Sedimentation analyses on detergent-containing gradients showed only a 5 S peak in high-salt detergent-free extracts and a 6 S peak, with a shoulder at about 7 S, in low-salt detergent-free extracts. Electrophoretic analysis in the presence of detergent demonstrated that the 14 S and 11 S peaks corresponded to aggregates of the 5 S/6 S form, whereas the 7 S peak corresponded to a hydrophilic acetylcholinesterase form which was recovered in the aqueous phase following Triton X-114 phase separation. The 5 S/6 S amphiphilic form could be converted into a 7.1 S hydrophilic form by phosphatidylinositol-specific phospholipase C digestion.

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48

Lin, Hai Xiao. "Modeling of Asymmetry Sedimentation of Foundation Induced Cracking of Masonry Wall with Openings." Advanced Materials Research 243-249 (May 2011): 2925–28. http://dx.doi.org/10.4028/www.scientific.net/amr.243-249.2925.

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The paper presents a numerical investigation of cracking of masonry wall with openings resulting from the asymmetry sedimentation of foundation. Two causes including end sedimentation and middle sedimentation are considered. The cracking process of the masonry wall with openings can be observed. The results indicate that different cracking patterns can be obtained with different sedimentation locations. Only oblique crack initiates and propagates when sedimentation occurs at end of the wall. A ski slope with the tips of the crack pointed outward can be obtained when sedimentation occurs at the middle of the wall.

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49

Дубровский, В. А., К. Н. Дворецкий, С. В. Марков, Е. П. Карпочева, and В. В. Тучин. "Оптическая цифровая регистрация седиментации эритроцитов и ее моделирование в форме коллективного процесса." Журнал технической физики 126, no. 5 (2019): 678. http://dx.doi.org/10.21883/os.2019.05.47670.20-19.

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AbstractThe dependence of the sedimentation rate of donor blood on its percentage in the sample (the degree of its dilution with physiologic saline) ranging from 0.25 to 100% (whole undiluted blood) is investigated with digital video equipment. The ratio of the value of displacement of the sediment–supernatant boundary per time unit was taken as the blood sedimentation rate. In case of registration of different speeds of movement of this boundary in a given volume of the cuvette, their spatial averaging was performed. A substantial increase in the blood sedimentation rate was found experimentally at high levels of its dilution, and, conversely, at blood concentrations in physiologic saline solutions that are close to whole blood. At the same time, the rate of blood sedimentation decreased several times with blood content in the range of 30–50%. It was experimentally shown that variation of blood content in the physiologic saline solution over a wide range did not affect the evenness of sedimentation occurring for almost any blood concentration in the mixture. In other words, in the process of sedimentation of a single blood sample of a given dilution in the physiologic saline solution, the sedimentation rate does not change with time. The experimentally obtained results allowed to build a theoretical model of blood sedimentation for two cases: 1) sedimentation of free erythrocytes (highly diluted blood) and 2) sedimentation of erythrocyte aggregates (almost undiluted blood, up to whole blood). The originality of the model comes from the proposition to consider the sedimentation of cells and/or their aggregates as a collective effect, and not in the traditional form of sedimentation of individual particles or particles interacting with each other. This model gives a satisfactory agreement with experimental laws with the use of certain empirical constants. The study is useful for understanding the process of erythrocyte sedimentation.

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Forke, Sven, Tim Rixen, Nicole Burdanowitz, Andreas Lückge, Venkitasubramani Ramaswamy, Philipp Munz, Dorothee Wilhelms-Dick, Christoph Vogt, Sabine Kasten, and Birgit Gaye. "Sources of laminated sediments in the northeastern Arabian Sea off Pakistan and implications for sediment transport mechanisms during the late Holocene." Holocene 29, no. 1 (October 17, 2018): 130–44. http://dx.doi.org/10.1177/0959683618804627.

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Laminated sediments of the continental slope off the Makran coast in the northern Arabian Sea are well-known climate archives and record productivity, as well as supply of material from land. Here, we studied sediment core 275KL off Pakistan in concert with sediment trap, dust and river samples in order to characterize and quantify land-derived material deposited in varves and event layers. We analysed grain sizes, mineral assemblages, bulk components and stable isotopes (δ13C, δ18O) of carbonates. In winter, enhanced river discharge is the main source of lithogenic matter contributing the major amounts to the total annual sedimentation of the northern Arabian Sea. During the late summer season, lithogenic matter accumulation is slightly enhanced, probably carried along with the south-eastward blowing Levar winds from the Balochistan and the Sistan Basins and the summer monsoon discharge maximum of perennial streams. C/N ratios and stable carbon and oxygen isotopes could not be used to distinguish between organic matter produced on land and in the ocean, whereas stable carbon and oxygen isotope ratios of carbonates suggest that sedimentation of event layers is dominated by direct inputs from land. Catastrophic denudation and storm events occur on average once every 50 years and lead to sedimentation rates that exceed the mean annual sedimentations of 983 g m−2 yr−1 by 6 to 10 times. Nevertheless, due to their rare occurrence, they contributed only 7% to the total sedimentation during the last ca. 5000 years. End-member modelling of grain sizes in accordance with lithogenic matter accumulation rates and event layer frequencies showed that arid conditions prevailed between 4000 and 5000 a BP while more humid conditions commenced around 2000 ka BP in accordance with the Pacific ENSO record.

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