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Journal articles on the topic 'Increased filtration zone'

Author: Grafiati

Published: 7 June 2025

Last updated: 2 August 2025

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1

Gropper, M. A., J. Bhattacharya, and N. C. Staub. "Filtration profile in isolated zone 1 and zone 3 dog lungs at constant high alveolar pressure." Journal of Applied Physiology 65, no. 1 (1988): 343–49. http://dx.doi.org/10.1152/jappl.1988.65.1.343.

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We measured the rate of liquid filtration in isolated dog lung lobes inflated to a constant alveolar pressure of 25 cmH2O and with all open vessels filled with plasma. We measured lung weight gain at vascular pressures ranging from 5 to 40 cmH2O relative to pleural pressure. We confirmed that under zone 1 conditions the "arterial" and "venous" extra-alveolar segments have essentially the same filtration characteristics. Using the combined extra-alveolar vascular system, we determined when recruitment of filtration surface area occurred as we increased vascular pressure from 0 to 40 cmH2O. Base

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2

Mavlyanov, A.A, T.E. Melnikova, and A. Milyutin. "Study of the impact of preliminary contour blasting on changing the zone of intensive rock crushing and reducing the level of watering of the massif in quarry." Multidisciplinary Journal of Science and Technology 5, no. 5 (2025): 376–79. https://doi.org/10.5281/zenodo.15382994.

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3

Lu, Shuai, Xiaoyu Feng, and Xiaosi Su. "Geochemical characteristics of arsenic in groundwater during riverbank filtration: a case study of Liao River, Northeast China." Water Supply 20, no. 8 (2020): 3288–300. http://dx.doi.org/10.2166/ws.2020.213.

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Abstract Affected by groundwater exploitation in the riverside, the infiltration of river water to recharge groundwater will cause changes in the groundwater environment, which has an important impact on the geochemical behavior of arsenic in groundwater. In this study, the groundwater environment zones in the process of river water infiltration were divided, and the arsenic content in groundwater in the study area had a good correlation with the environment zones. In the weak oxidation environment zone and the weak reductive environment zone, as the distance from the riverbank increased, the

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4

Grimbert, F. A., D. Martin, J. C. Parker, and A. E. Taylor. "Lymph flow during increases in pulmonary blood flow and microvascular pressure in dogs." American Journal of Physiology-Heart and Circulatory Physiology 255, no. 5 (1988): H1149—H1155. http://dx.doi.org/10.1152/ajpheart.1988.255.5.h1149.

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We studied the effects of an increase in pulmonary blood flow (PBF) on steady-state lung lymph flow (QL) and protein transport in anesthetized dogs (n = 7) to estimate the effect of vascular recruitment in zone 3 on transvascular filtration. At the end of each experiment, we increased left atrial pressure to 25-30 mmHg using a balloon catheter and obtained a washdown of the lymph protein concentration. PBF was increased with an extracorporeal circuit, which pumped blood from the left to the right atrium, and increases in pulmonary capillary pressure (Pc) were minimized by lowering left atrial

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5

Bujakowski, Filip, Tomasz Falkowski, Anna Podlasek, and Piotr Ostrowski. "Real-Time Groundwater Dynamics Verification in the Embankment’s Substrate during the Transition of a Flood Wave." Water 14, no. 24 (2022): 3986. http://dx.doi.org/10.3390/w14243986.

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The scope of the presented research included real-time verification of groundwater dynamics in the zone of the filled erosion channel (crevasses) and in the non-transformed zone of the floodplain area during the transition of a flood wave in the river channel. The technical goal was to provide data for the calibration and verification of mathematical model of groundwater flow. For this purpose, automatic recorders of groundwater level and electrical conductivity were installed in the zones selected earlier with the use of DEM. The measurements were carried out in 3 series during the passage of

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6

El idrissi, Bouchaib, Éric Loranger, Robert Lanouette, Jean Pierre Bousquet, and Mark Martinez. "Kraft, BCTMP, and TMP dewatering behaviour along the axis of a screw press." BioResources 15, no. 1 (2020): 1282–97. http://dx.doi.org/10.15376/biores.15.1.1282-1297.

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The drainage- and dewatering-controlling mechanisms in a screw press were detailed in this work. Three pulps (kraft pulp, bleached chemi-thermomechanical pulp, and thermomechanical pulp) were studied to compare a wide range of wood fibre types. The dewatering was controlled by the screw press parameters and the pulps’ properties. Filtration was found to be the controlling mechanism in the first part of the screw press for the three pulps, and it was less important when the fines content was greater. In the compression zone, the degree of compression was affected by the pulp flexibility and the

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7

Krukovska, Viktoriia, and Viktor Kocherha. "Influence of the method of gate road protection on the operating efficiency of methane drainage boreholes." IOP Conference Series: Earth and Environmental Science 970, no. 1 (2022): 012045. http://dx.doi.org/10.1088/1755-1315/970/1/012045.

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Abstract Methods of numerical modelling have helped to carry out the research of coupled processes of rock deformation around a gate road with methane drainage boreholes and methane filtration in terms of applying different techniques of its protection. The following has been shown: without the use of protective structures, underworked drainage boreholes are broken and stop functioning. If the protective structures are used, the rock-bolting beam above the mined-out space becomes stable. Boreholes go beyond the zones of inelastic deformations and remain in their operating conditions even after

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8

Anglade, Daniel, Michel Corboz, Ahmed Menaouar, et al. "Blood flow vs. venous pressure effects on filtration coefficient in oleic acid-injured lung." Journal of Applied Physiology 84, no. 3 (1998): 1011–23. http://dx.doi.org/10.1152/jappl.1998.84.3.1011.

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On the basis of changes in capillary filtration coefficient ( K fc) in 24 rabbit lungs, we determined whether elevations in pulmonary venous pressure (Ppv) or blood flow (BF) produced differences in filtration surface area in oleic acid-injured (OA) or control (Con) lungs. Lungs were cyclically ventilated and perfused under zone 3 conditions by using blood and 5% albumin with no pharmacological modulation of vascular tone. Pulmonary arterial, venous, and capillary pressures were measured by using arterial, venous, and double occlusion. Before and during each K fc-measurement maneuver, microvas

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9

Chen, Jian, Dongyang Xi, Guichao Wang, Mi Zhou, Yibo Hu, and Xihua Xie. "Numerical Investigation into Particle Migration Characteristics in Hydraulic Oil Filtration." Processes 13, no. 5 (2025): 1289. https://doi.org/10.3390/pr13051289.

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An oil filter is a necessary and significant part of many manufacturing processes and equipment. Unlike the structural design and filter material selection, the particle movement in the filter during filtration is the fundamental factor influencing the filter’s performance, but this has not attracted enough attention. Due to the small size and large number of particles in the filter, it is difficult to monitor every particle’s movement. Therefore, this work used a hydraulic oil filter as a case study. Computational Fluid Dynamics (CFD) was coupled with the Discrete Phase Model (DPM) to investi

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10

Vargas Silva, Diego A., Zuly H. Calderón, Darwin C. Mateus, and Gustavo E. Ramírez. "Numerical Simulation of Drilling Fluid-Wellbore Interactions in Permeable and Fractured Zones." Mathematical and Computational Applications 30, no. 3 (2025): 60. https://doi.org/10.3390/mca30030060.

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In well drilling operations, interactions between drilling fluid water-based and the well-bore present significant challenges, often escalating project costs and timelines. Particularly, fractures (both induced and natural) and permeable zones at the wellbore can result in substantial mud loss or increased filtration. Addressing these challenges, our research introduces a novel coupled numerical model designed to precisely calculate fluid losses in fractured and permeable zones. For the permeable zone, fundamental variables such as filtration velocity, filtrate concentration variations, permea

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11

He, Zhong, Sheng Fan, Junwei Fang, et al. "Research and Application of Fast Plugging Method for Fault Zone Formation in Tarim Basin, China." Energies 16, no. 11 (2023): 4330. http://dx.doi.org/10.3390/en16114330.

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The Silurian strata in the Shunbei No. 5 fault zone have the characteristics of long open holes, easy leakage and complex leakage. In the early stages, plugging technologies and methods such as bridging plugging, cement, chemical consolidation and high-water-loss plugging have poor effects and low plugging efficiency. Plugging slurry directly prepared with drilling fluid has low filtration characteristics, and the main reason is that the plugging material cannot filter quickly after the fluid enters the fracture. Based on the basic principle of fast filtration, the main plugging fluid M-Fluid,

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12

Cotman, Zachary J., Michael J. Bowden, Barrett P. Richter, Joseph H. Phelps, and Christopher J. Dibble. "Factors affecting aerosol SARS-CoV-2 transmission via HVAC systems; a modeling study." PLOS Computational Biology 17, no. 10 (2021): e1009474. http://dx.doi.org/10.1371/journal.pcbi.1009474.

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The role of heating, ventilation, and air-conditioning (HVAC) systems in the transmission of SARS-CoV-2 is unclear. To address this gap, we simulated the release of SARS-CoV-2 in a multistory office building and three social gathering settings (bar/restaurant, nightclub, wedding venue) using a well-mixed, multi-zone building model similar to those used by Wells, Riley, and others. We varied key factors of HVAC systems, such as the Air Changes Per Hour rate (ACH), Fraction of Outside Air (FOA), and Minimum Efficiency Reporting Values (MERV) to examine their effect on viral transmission, and add

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13

Takizawa, S., P. Zhao, S. Ohgaki, and H. Katayama. "Kinetic analysis of PAC cake-layer formation in hybrid PAC-MF systems." Water Supply 8, no. 1 (2008): 1–7. http://dx.doi.org/10.2166/ws.2008.006.

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Experimental studies were conducted to evaluate the effectiveness of backwashing and air-scouring to prevent cake-layer formation on the membranes in a hybrid PAC-MF process. The membrane filtration chamber used in this study was separated into two zones; namely, the PAC adsorption zone (PAZ) and the membrane filtration zone (MFZ). In MFZ tubular ceramic membranes were installed, and powdered activated carbon (PAC) was suspended in PAZ at a concentration of 20 g/L by aeration. Air-scouring and backwashing rates were gradually increased to see if these physical cleaning measures can reduce or m

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14

Dadash-Zade, Mirza A., and Inglab N. Aliyev. "Filtration of compressible viscous-plastic oil in a porous medium." Nafta-Gaz 79, no. 6 (2023): 406–11. http://dx.doi.org/10.18668/ng.2023.06.04.

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Numerous laboratory studies have shown that the change in physical and chemical properties and the geological conditions of the occurrence of hydrocarbons depend on depth. It should be noted that the change in oil properties with depth and the identification of the properties of such oils are poorly understood. In this research work, an attempt is made to study the filtration properties of anomalous oils, taking into account compressibility in reservoir conditions. The work carried out shows that the density, dynamic viscosity and the content of resins, sulfur, paraffin and asphaltene of diffe

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15

Dakovic-Bjelakovic, Marija, Slobodan Vlajkovic, Rade Cukuranovic, Svetlana Antic, Goran Bjelakovic, and Dejan Mitic. "Changes of the glomerular size during the human fetal kidney development." Srpski arhiv za celokupno lekarstvo 134, no. 1-2 (2006): 33–39. http://dx.doi.org/10.2298/sarh0602033d.

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Introduction. Newborns adaptation on postnatal conditions includes significant morphological and functional renal changes. Every kidney contains a constant number of nephrons, at the end of the nephrogenesis period, which extends from week 8 to 34 of gestation. Mature juxtamedullary nephrons possess higher filtration capacity than primitive superficial nephrons, which have insufficient vascularization. Objective. The objective of the study was to calculate an average glomerular diameter in cortical zones of the kidney during development, to define periods of their most intensive growth, and to

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16

Zhang, Yulong, Peikun Liu, Linjing Xiao, Long Chang, Fangping Yan, and Lanyue Jiang. "Effect of Cone-Plate Clarifier Structure Parameters on Flocculation Efficiency." Separations 9, no. 1 (2021): 6. http://dx.doi.org/10.3390/separations9010006.

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In this study, a coal mine water flocculation system was established. A series of flocculation tests were carried out at different structural parameters (cylinder height, cone-plate insertion depth and cone-plate spacing) to better investigate the effect of the cone-plate clarifier on coal mine water treatment performance. Sixteen sampling points were set up in the system for data monitoring to generate the required data. The cone-plate clarifier was divided into five zones for flocculation analysis. The increased cylinder height facilitated the flocculation of particles in the micro flocculat

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17

Albert, R. K., W. J. Lamm, and D. L. Luchtel. "Effect of lung inflation on fluid flux in zone 1 lungs." Journal of Applied Physiology 64, no. 1 (1988): 285–90. http://dx.doi.org/10.1152/jappl.1988.64.1.285.

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Because of conflicting data in the literature, we studied the effect of positive-pressure inflation on transvascular fluid filtration in zone 1 lungs. Lungs from New Zealand White rabbits (n = 10) were excised, perfused with saline and autologous whole blood (1:1), ventilated, and continuously weighed. Pulmonary arterial and venous pressures (Pvas) were referenced to the most dependent part of the lung. A change in vascular volume (delta Vvas) and a fluid filtration rate (FFR) were calculated from the change in lung weight that occurred from 0 to 30 s and from 3 to 5 and 5 to 10 min, respectiv

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18

Soffer, Y., R. Ben Aim, and A. Adin. "Membrane for water reuse: effect of pre-coagulation on fouling and selectivity." Water Science and Technology 42, no. 1-2 (2000): 367–72. http://dx.doi.org/10.2166/wst.2000.0340.

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Membrane filtration is adequate for producing disinfected clear water suitable for various kinds of applications. However, fouling of membranes is the main limitation. This study has focused on the ability of flocculation to remove from wastewater the organic colloids which play an important role in the fouling phenomena. First, flocculation was optimized for high-efficiency removal of suspended solids and organic material, and then, at a selected ferric chloride dose and pH, was used as a first step before filtration on membranes ranging from UF (50 KDa) to NF. This resulted in an improvement

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19

Kim, Kiwoong. "Migration of ions near charged surface." PLOS ONE 16, no. 4 (2021): e0250343. http://dx.doi.org/10.1371/journal.pone.0250343.

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Detailed understanding of ionic behavior in the region near a charged surface is important for the enhancement of water filtration mechanisms. In this study, a highly charged membrane is hypothesized to form an ion depletion zone (IDZ) without an external power supply. The formation of IDZ was experimentally investigated using membranes with varying surface zeta potential (SZP) values to confirm the hypothesis. The surface zeta potential of the charged membrane was controlled by layer-by-layer deposition method. Our results indicate that indicated that the fluorescent intensity near the charge

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20

Bezruchko, K. A., V. F. Prykchodchenko, O. V. Prykchodchenko, and M. O. Hladka. "Predicting zones of increased water inflows in local folded structures." Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu, no. 4 (August 2023): 5–10. http://dx.doi.org/10.33271/nvngu/2023-4/005.

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Purpose. To predict zones of increased water inflows based on geological exploration and mining-geological data in the real conditions of an operating coal mine using the method of predictive evaluation of prospects of local structures for the presence of gas accumulations. Methodology. The research was carried out by constructing a map of local structures using trend analysis. The synclinal fold is allocated in the plan and its main parameters – amplitude and width – are determined. Based on these parameters of the structure, the authors performed calculations of relative linear deformations

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21

Bai, Yang, Binsong Jiang, Le Yang, Yunqiu Liu, He Zheng, and Yapeng Li. "Experimental Study on the Characteristics and Formation Mechanism of Dynamic Filter Cake for Slurry Shield Tunneling." Minerals 12, no. 3 (2022): 331. http://dx.doi.org/10.3390/min12030331.

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The key to guaranteeing excavation face stability in slurry shield tunneling is the formation of an impermeable dynamic filter cake. At the same time, the effect of the cutter head and rotation speed should be taken into account. We studied the characteristics and formation mechanism of the dynamic filter cake using a newly developed experimental apparatus. The experiment results show that the hysteretic infiltration zone appeared in the curves of stepped loading filtration while the cutter head was rotating, and the volume of water filtration increased by 11.2% compared to when the cutter hea

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22

Suleimanova, Malika D., Ramil F. Sharafutdinov, and Ildar V. Kanafin. "Investigation of the temperature distribution in a heterogeneous reservoir during fluid filtration, taking into account thermodynamic effects." Tyumen State University Herald. Physical and Mathematical Modeling. Oil, Gas, Energy 9, no. 1 (2023): 6–21. http://dx.doi.org/10.21684/2411-7978-2023-9-1-6-21.

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Based on the modeling of non-isothermal fluid filtration, taking into account the Joule–Thomson effect and the adiabatic effect, the formation of temperature in a porous medium with radial-angular permeability heterogeneity is studied. It is shown that the presence of heterogeneity in the near-wellbore formation zone leads to different rates of temperature establishment in the angular distribution after the well is put into operation. Depending on the ratio of the permeability of the formation and the area of heterogeneity during fluid filtration in the angular distribution of temperature in t

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23

Bhattacharjee, Mrinal K., Praveen K. Bommareddy, and Anthony L. DePass. "A Water-Soluble Antibiotic in Rhubarb Stalk Shows an Unusual Pattern of Multiple Zones of Inhibition and Preferentially Kills Slow-Growing Bacteria." Antibiotics 10, no. 8 (2021): 951. http://dx.doi.org/10.3390/antibiotics10080951.

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Organic extract of Rhubarb (Rheum officinale) roots is known to have several medicinal uses. However, not much research has been done with the rhubarb stalk. The aim of this research is to evaluate the anti-bacterial and anti-proliferative effects of the aqueous extract from rhubarb stalks. The crude aqueous extract was further purified using anion exchange and gel filtration. The purified compound demonstrated broad spectrum antibacterial activity against the Gram-negative bacteria, E. coli and Aggregatibacter actinomycetemcomitans, and Gram-positive bacteria, S. aureus. A time-kill assay dem

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24

К.Б., Ахмадуллин, Мирсаетов О.М. та Ромашко А.Д. "ОСОБЕННОСТИ ПРИМЕНЕНИЯ ТЕХНОЛОГИИ НЕСТАЦИОНАРНОГО ЗАВОДНЕНИЯ НА ПОЗДНЕЙ СТАДИИ РАЗРАБОТКИ НЕФТЯНОЙ ЗАЛЕЖИ С ПОРОВЫМ И ТРЕЩИНОВАТО- ПОРОВЫМ ТИПОМ ПЛАСТА КОЛЛЕКТОРА". Управление техносферой 7, № 3 (2024): 397–418. http://dx.doi.org/10.34828/udsu.2024.57.34.003.

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Выполнен анализ применения технологий циклического заводнения на верейско-башкирских отложениях в юго-восточной зоне Удмуртской Республики. Отмечены факты низкой эффективности нестационарного заводнения вследствие отсутствия систематизированного подхода к подбору скважин-кандидатов под циклическую закачку, а также отсутствие учета зон повышенной трещиноватости пласта. Выявлены наиболее вероятные причины снижения эффективности, связанные с размещением скважин в зонах повышенной трещиноватости и пониженной анизотропии проницаемости пластов. Предложено использование методов математической статист

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25

Parker, J. C., and S. Yoshikawa. "Vascular segmental permeabilities at high peak inflation pressure in isolated rat lungs." American Journal of Physiology-Lung Cellular and Molecular Physiology 283, no. 6 (2002): L1203—L1209. http://dx.doi.org/10.1152/ajplung.00488.2001.

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The response of segmental filtration coefficients ( K f) to high peak inflation pressure (PIP) injury was determined in isolated perfused rat lungs. Total ( K f,t), arterial ( K f,a), and venous ( K f,v) filtration coefficients were measured under baseline conditions and after ventilation with 40–45 cmH2O PIP. K f,a and K f,v were measured under zone I conditions by increasing airway pressure to 25–27 cmH2O. The microvascular segment K f ( K f,mv) was then calculated by: K f,mv = K f,t − K f,a − K f,v. The baseline K f,twas 0.090 ± 0.022 ml · min−1 · cmH2O−1 · 100 g−1 and segmentally distribut

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26

Malakhova, Anna. "Calculation of a rectangular reinforced concrete reservoir, taking into account technological concreting seams." E3S Web of Conferences 533 (2024): 02009. http://dx.doi.org/10.1051/e3sconf/202453302009.

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When designing buildings and structures in monolithic reinforced concrete, including rectangular reservoirs, it is very important to take into account technological concreting seams. For the reservoir, the water resistance of the technological concreting seams is of fundamental importance, since it can cause increased water filtration through the enclosing structures of the reservoirs. Filtration of water, in turn, leads to increased corrosion of the reinforcement with a subsequent decrease in the bearing capacity structures. Many domestic researchers have paid attention to various aspects of

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27

Xu, K. Q., Y. Sakaguchi, O. Nishimura, Y. Tanaka, and R. Sudo. "Testing an artificial beach system for removal of pollution in a coastal zone." Water Science and Technology 34, no. 7-8 (1996): 245–52. http://dx.doi.org/10.2166/wst.1996.0628.

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The developmental activities and utilizations of Japanese coastal seas have been increased recently. Consequently, the production of coastal fisheries, especially of those in enclosed seas, are considerably affected by artificial impacts such as reclamation from the sea and increased pollution load. The objective of this paper is to propose a new ecotechnological method to recover the polluted coastal environment by using an artificial beach system. An artificial beach (5 m × 10 m) was constructed in the Matsushima Bay facing the Pacific Sea, about 300 km northeast from Tokyo. The area was pol

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Savranova, T. N., V. U. Rozukulov, A. F. Yusupov, D. A. Asadov, and S. S. Saidzhonov. "Surgical treatment of glaucoma with filtration bleb activation of a patient with Sturge — Weber syndrome: a clinical case." Russian Ophthalmological Journal 15, no. 3 (2022): 128–35. http://dx.doi.org/10.21516/2072-0076-2022-15-3-128-135.

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Purpose: to describe surgical treatment of glaucoma of a patient with Sturge — Weber — Krabbe syndrome. We present a clinical case of a patient with Sturge — Weber — Krabbe syndrome who sought assistance with us due to secondary stage III glaucoma with moderately elevated intraocular pressure. The examination revealed a cutaneous hemangioma of the frontal, and zygomatic area of the left half of the face, the upper and the lower eyelids, and conjunctival and episcleral hemangioma of the left eye. Since local hypotensive drug therapy produced no effect, the patient was offered a surgical treatme

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Tyukavkina, O. V., V. V. Shelepov, V. L. Shuster, and I. L. Kapitonova. "The results of geological modeling of low-permeability reservoirs on the example of deposits of the Ob River Region." Moscow University Bulletin Series 4 Geology, no. 2, 2025 (2025): 65–71. https://doi.org/10.55959/msu0579-9406-4-2025-64-2-65-71.

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The issues of studying the filtration and capacitance properties of low-permeable reservoirs of the Ю2 formation of the Tyumen formation are considered to assess oil saturation in the transition zone and determine the position of the water-oil contact level in order to increase the efficiency of modeling the Ю2 formation and establish parameters for clarifying oil reserves. Significant oil deposits of the Tyumen formation have been discovered in the central part, the western, eastern and southeastern wings of the Surgut arch, which are characterized by a significant difference in well flow rat

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Voloshkina, Olena, Olena Zhukova, and Daniil Marshall. "Theoretical justification of the assessment of contamination of surface water resources by underground runoff as a result of military operations." Gіrnichі, budіvelnі, dorozhnі ta melіorativnі mashini, no. 101 (October 10, 2023): 5–10. http://dx.doi.org/10.32347/gbdmm.2023.101.0101.

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Military actions on the territory of Ukraine cause a negative impact on the quality of water resources due to the ingress of contaminated effluents into underground horizons due to the destruction and/or damage of treatment facilities. This work deals with the definition of theoretical approaches to the quantitative assessment of pollution entering surface water resources through underground feeding due to damage to protective screens in ponds, storage tanks of various types and tailings storage facilities. The spread of contamination in case of screen damage was noted in three stages: wetting

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Fontanos, P. M., K. Yamamoto, and F. Nakajima. "Effect of upflow velocity on the performance of an inclined plate membrane bioreactor treating municipal wastewater." Water Science and Technology 64, no. 5 (2011): 1102–7. http://dx.doi.org/10.2166/wst.2011.142.

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An inclined plate membrane bioreactor (iPMBR) was introduced to meet the challenge of handling high mixed liquor suspended solids when operating at long sludge retention times. During the first 407 days of operation, the iPMBR was able to rezone more sludge (1.5–10.5 times greater) in its upstream, anoxic tank compared to its downstream, aerobic tank. This could extend membrane filtration by diverting most of the sludge from the aerobic zone. During this period, the upflow velocities through the inclined plates of the anoxic tank ranged from 2.3 × 10−4 to 7.7 × 10−4 m/s. After Day 407, the ope

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Desbos, Gilbert, Frank Rogalla, Jacques Sibony, and Marie-Marguerite Bourbigot. "Biofiltration as a Compact Technique for Small Waste Water Treatment Plants." Water Science and Technology 22, no. 3-4 (1990): 145–52. http://dx.doi.org/10.2166/wst.1990.0195.

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Biological aerated filters combine bacterial degradation of pollution by fixed biomass with physical filtration in a single reactor. Removal rates become independent of clarification and sludge setueability limits, and concentration of biomass is increased. Nitrifiers attach to the media, allowing nitrogen removal without sludge age constraints. Several fullsize plants with the BIOCARBONE process for industrial and municipal wastewater treatment have established the compacity, ease of operation and high removal rates achievable with this advanced treatment system. A new biofilter design offeri

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Ashabul Kahfi, Nita Kusumawati, Pirim Setiarso, Supari Muslim, Sinta Anjas Cahyani, and Nafisatus Zakiyah. "Study in the impact of quaternized graphene oxide (QGO) composition as modifier on the chemical, physical, mechanical, and performance properties of polyvinylidene fluoride (PVDF)-based nanocomposite membrane." Communications in Science and Technology 9, no. 1 (2024): 30–37. http://dx.doi.org/10.21924/cst.9.1.2024.1393.

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Polyvinylidene Fluoride (PVDF) membranes were modified with quaternized graphene oxide (QGO) synthesized from graphene oxide and quaternized ammonium groups. PVDF/QGO membranes were created by blending PVDF and 0.01-0.05 g QGO via phase inversion. FTIR confirmed the successful QGO incorporation. PVDF/QGO membranes exhibited increased mechanical stiffness. Meanwhile, SEM revealed asymmetric morphology with surface and internal pores. AFM showed the membrane with 0.05 g and QGO had the highest surface roughness of 101.2 nm, which increased filtration area and flux. QGO improved hydrophilicity th

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Glukhova, S. A., O. V. Pinigin, and A. V. Rastorguev. "The Role of Shear Tension Structures in Subvertical Filtration of the Water Drive System of the Moscow Artesian Basin." Moscow University Bulletin. Series 4. Geology, no. 1 (April 20, 2023): 97–109. http://dx.doi.org/10.55959/msu0579-9406-4-2023-63-1-97-109.

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Presents the results of a study in which a local dome-shaped piezometric surface of the Podolsko- Myachkovski aquifer complex was revealed in the western part of the Moscow region, the central part of which coincides with an elongated swampy depression. The results of morphostructural and geological-structural analyzes show that the depression may have a tectonic origin. Using the method of mathematical modeling, it is shown that the formation of a groundwater recharge dome is possible only due to the presence of a zone of increased permeability of the Callovian-Kimmeridgian waterproof complex

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Littner, M. R., and F. D. Lott. "Inhibition of eicosanoids does not prevent neutrophil injury from phorbol in isolated rabbit lung." Journal of Applied Physiology 76, no. 4 (1994): 1664–74. http://dx.doi.org/10.1152/jappl.1994.76.4.1664.

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Studies suggest that pulmonary and neutrophil cyclooxygenase and lipoxygenase products (i.e., eicosanoids) play a role in oxidant lung injury. We tested the hypothesis that such eicosanoids contribute to lung injury from activation of rabbit neutrophils by phorbol myristate acetate (PMA) in the pulmonary circulation of salt-perfused isolated rabbit lung preparations. We measured lung injury from PMA-activated neutrophils under zone 2 pulmonary vascular conditions with transvascular albumin flux by 125I-labeled albumin. We found that this flux was increased; catalase prevented the increase, con

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Jabur, Akram Raheem, Laith Kais Abbas, and Saja Aqeel Moosa. "Antibacterial Activity of Electrospun Silver Nitrate /Nylon 6 Polymeric Nanofiber Water Filtration Mats." Al-Khwarizmi Engineering Journal 13, no. 1 (2017): 84–93. http://dx.doi.org/10.22153/kej.2017.10.001.

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Bacterial water pollution is a genuine general wellbeing concern since it causes various maladies. Antimicrobial nanofibers can be integrated by incorporating nanobiocides, for example, silver nanoparticles into nanofibers. Nylon 6 was dissolved in formic acid at a concentration of (25 wt. %) and tough antibacterial (AgNO3/Nylon) nanofibers were produced utilizing electrospinning system. Polymer solution was tested before accomplishing electrospinning process to acquire its surface tension, electric conductivity and viscosity, where every one of those parameters increased relatively with incre

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Shibamoto, T., J. C. Parker, A. E. Taylor, and M. I. Townsley. "Derecruitment of filtration surface area in paraquat-injured isolated dog lungs." Journal of Applied Physiology 68, no. 4 (1990): 1581–89. http://dx.doi.org/10.1152/jappl.1990.68.4.1581.

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The capillary filtration coefficient (Kf,c) is a sensitive and specific index of vascular permeability if surface area remains constant, but derecruitment might affect Kf,c in severely damaged lungs with high vascular resistance. We studied the effect of high and low blood flow rates on Kf,c in papaverine-pretreated blood-perfused isolated dog lungs perfused under zone 3 conditions with and without paraquat (PQ, 10(-2) M). Three Kf,cs were measured successively at hourly intervals for 5 h. These progressed sequentially from isogravimetric blood flow with low vascular pressure (I/L) to high flo

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PANASIUK, Mykola, Natalia SOSONNA, Ihor KOVALENKO, Mykhailo BUZYNNYI, and Oleksii SHEVCHENKO. "A PERMANENT MATHEMATICAL MODEL OF FILTRATION AND MIGRATION CONDITIONS BETWEEN THE PRIPYAT AND UZH RIVERS OF THE CHORNOBYL EXCLUSION ZONE." Visnyk of Taras Shevchenko National University of Kyiv. Geology, no. 1 (104) (2024): 115–23. http://dx.doi.org/10.17721/1728-2713.104.14.

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Background. Over the past 8–10 years, the radio-hydroecological and hydrogeological conditions of the Chornobyl Exclusion Zone have changed significantly. Under the influence of the decommissioning of the water-containing cooler, the levels, speed and direction of movement of groundwater have changed on a regional scale. New radiation-hazardous objects were created: Storage of spent nuclear fuel (SSNF-2) and Centralized storage of spent nuclear fuel (CSSNF). The impact of climate change on the regime of water bodies has also increased. To study the impact of radiation-hazardous objects on the

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Guo, Yanli, Weiqi Liu, Chaojie Song, Qingtao Gong, and Yao Teng. "Seepage–Diffusion Mechanism of Gas Kick Considering the Filtration Loss of Oil-Based Muds During Deepwater Drilling." Journal of Marine Science and Engineering 12, no. 11 (2024): 2035. http://dx.doi.org/10.3390/jmse12112035.

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As oil and gas exploration gradually advances into deep waters, the combined effects of various types of gas kick and the accurate calculation of the gas-kick volume have gained increasing attention. This study focused on gas kicks from permeable gas-bearing formations, considering the mass transfer of gas in the filtration region of the drilling fluids and revealed the mechanisms of seepage-driven and diffusion-driven gas kicks. Based on seepage mechanics and diffusion theory, a comprehensive model for calculating gas-kick volume was established, considering the synergistic effect of gas-conc

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Khuzin, Rinat, Vadim Andreev, Vyacheslav Mukhametshin, Lyubov Kuleshova, Gennadiy Dubinskiy, and Аlbina Safiullina. "Influence of hydraulic compression on porosity and permeability properties of reservoirs." Записки Горного института 251 (October 29, 2021): 688–97. http://dx.doi.org/10.31897/pmi.2021.5.8.

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Active development of hard-to-recover oil reserves causes the need for an innovative approach to methods of oil recovery and intensification of its production, based on taking into account the specifics of filtration processes in low-productive reservoirs and complex geological and physical conditions. Pilot works for studying the mechanism of changes in porosity and permeability properties of reservoirs during swabbing of wells are presented. Based on the hydrodynamic investigations performed, the results of the work are analyzed. The method of oil production intensification using hydraulic c

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Tomlinson, S. S., and Y. P. Vaid. "Seepage forces and confining pressure effects on piping erosion." Canadian Geotechnical Journal 37, no. 1 (2000): 1–13. http://dx.doi.org/10.1139/t99-116.

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An experimental study of piping erosion is presented. Various artificial granular filter and base soil combinations are tested in a permeameter under variable confining pressures to determine the critical gradient where soil erodes through the filter. Previous research has concentrated on establishing a filter to soil grain size ratio criteria, typically D15f /D85s < 4, which separates safe from potentially unsafe filters. These works often ignored self-filtration zone formation phenomena and rarely documented the influence of variables such as confining pressure, filter thickness, and hydr

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Albert, R. K., G. Greenberg, R. J. Guest, D. Luchtel, and W. R. Henderson. "Leukotrienes C4 and D4 do not increase filtration coefficient of excised perfused guinea pig lungs." Journal of Applied Physiology 62, no. 1 (1987): 1–9. http://dx.doi.org/10.1152/jappl.1987.62.1.1.

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We tested the direct effects of leukotriene (LT) C4 or D4 on the pulmonary vascular fluid filtration coefficient (Kf) by adding these LT's to the cell-depleted perfusate of excised guinea pig lungs. Pulmonary arterial (Ppa) and airway (Paw) pressures were monitored, and left atrial pressure was kept constant during 10 min of constant-flow perfusion. Kf's were then calculated by two methods [Drake and colleagues (KfD), Am. J. Physiol. 234 (Heart Circ. Physiol. 3): H266-H274, 1978; and Goldberg (KfG), Am. J. Physiol. 239 (Heart Circ. Physiol. 8): H189-H198, 1980] from the change in lung weight r

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Ghazali, Nurul Aimi, M. Z. M. Jaih, T. A. T. Mohd, Nur Hashimah Alias, Azlinda Azizi, and Effah Yahya. "The Characteristic Study of Oil Palm Kernel Expeller as Lost Circulation Material in Water Based Drilling Mud (WBM)." Advanced Materials Research 1113 (July 2015): 648–53. http://dx.doi.org/10.4028/www.scientific.net/amr.1113.648.

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When drill in a highly permeable zone the common problem faced by the operator is lost circulation of drilling mud into the formation. Lost circulation of mud are costly and therefore lost circulation materials (LCM) being introduced to the mud formulation to prevent lost circulation from the formation. Since Malaysia is the one of the major country producer of Palm kernel Oil (PKO) with the high production of crude fibre from palm kernel (palm kernel expeller), thus this study was carried out to determine the ability of Palm Kernel Expeller (PKE) to be used as LCM in drilling mud. PKE used wa

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Fawzya, Yusro Nuri, Stenny Putri, Nita Noriko, and Gintung Patantis. "Identification of SGS 1609 Cellulolytic Bacteria Isolated from Sargassum spec. and Characterization of The Cellulase Produced." Squalen Bulletin of Marine and Fisheries Postharvest and Biotechnology 8, no. 2 (2013): 57. http://dx.doi.org/10.15578/squalen.v8i2.87.

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Bacterial isolate from seaweed designated as SGS 1609 was previously found to be able to produce cellulase represented by formation of clear zone on solid medium containing carboxymethylcellulose (CMC). This research was conducted to identify the isolate and determine optimum production time as well as characterize the cellulase produced. The isolate was identified using 16s-rRNA gene analysis. Cellulase production was conducted by cultivating the isolate in the liquid medium containing CMC followed by centrifuging to get supernatant as the crude enzyme. The enzyme was then concentrated using

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Nesterenko, Yu M., M. Yu Nesterenko, N. V. Solomatin, A. V. Khalin, and S. A. Fedyunin. "Influence of agricultural activities on formation of the water flow of Samara River in 1936-2020." IOP Conference Series: Earth and Environmental Science 1010, no. 1 (2022): 012095. http://dx.doi.org/10.1088/1755-1315/1010/1/012095.

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Abstract Agricultural lands occupy 90% of the Southern Urals. The influence of agricultural activity on the catchment area and changes in it on the runoff of melt water from the catchment areas of its steppe zone in 1936-2020 years is considered. on the example of the unregulated upper reaches of the Samara River. In the pre-war 1936-1941 years in the grass-field system of agriculture, with an increased density of soils under perennial grasses, half of the melt water entered the rivers. During the war years, with the deterioration of the culture of agriculture, the runoff coefficient increased

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Winn, R., S. Nickelson, and C. L. Rice. "Fluid filtration coefficient of isolated goat lungs was unchanged by endotoxin." Journal of Applied Physiology 64, no. 6 (1988): 2463–67. http://dx.doi.org/10.1152/jappl.1988.64.6.2463.

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The Starling fluid filtration coefficient (Kf) of blood-perfused excised goat lungs was examined before and after infusion of Escherichia coli endotoxin. Kf was calculated from rate of weight gain as described by Drake et al. [Am. J. Physiol. 234 (Heart Circ. Physiol. 3): H266-H274, 1978]. These calculations were made twice during base line and then at hourly intervals for 5 h after infusion of 5 mg (approximately 250 micrograms/kg) of E. coli endotoxin or after injection of oleic acid (47 microliter/kg). All lungs were perfused at constant arterial and venous pressure under zone 3 conditions.

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Yerushalmi, L., M. Alimahmoodi, and C. N. Mulligan. "Performance evaluation of the BioCAST technology: a new multi-zone wastewater treatment system." Water Science and Technology 64, no. 10 (2011): 1967–72. http://dx.doi.org/10.2166/wst.2011.776.

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A new wastewater treatment technology, called BioCAST, has been designed and developed for high rate and simultaneous removal of organic carbonaceous compounds as well as nitrogen and phosphorus, along with reduced sludge generation. The treatment system has two interlinked reactors containing four independent zones with different environmental conditions of aerobic, microaerophilic, anoxic and anaerobic for the biological treatment of wastewater, as well as two clarification zones and a filtration unit for solid–liquid separation. The treatment system contains suspended as well as fixed-film

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Stefanik, Ondrej, Andrea Horniakova, Ivana Cizmarova, et al. "Enhanced Sample Throughput Capillary Zone Electrophoresis with UV Detection in Hydrodynamically Closed System for Determination of Ibuprofen." Separations 9, no. 5 (2022): 118. http://dx.doi.org/10.3390/separations9050118.

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A simple analytical approach based on capillary zone electrophoresis with ultraviolet detection and repeated sample injection strategy (applied in a hydrodynamically closed separation system for the first time) was developed for the determination of ibuprofen (IBU) in commercially available pharmaceutical preparations. The proposed method was characterized by significantly increased sample throughput and favorable validation parameters, highly demanded in routine quality control laboratories. The limit of detection was predicted at the concentration level of 0.31 µg/mL. Intra-day precision exp

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Klaesner, Joseph W., N. Adrienne Pou, Richard E. Parker, Charlene Finney, and Robert J. Roselli. "Optical measurement of isolated canine lung filtration coefficients after alloxan infusion." Journal of Applied Physiology 84, no. 4 (1998): 1381–87. http://dx.doi.org/10.1152/jappl.1998.84.4.1381.

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In this study, lung filtration coefficient ( K fc) was measured in eight isolated canine lung preparations by using three methods: standard gravimetric (Std), blood-corrected gravimetric (BC), and optical. The lungs were held in zone III conditions and were subjected to an average venous pressure increase of 8.79 ± 0.93 (mean ± SD) cmH2O. The permeability of the lungs was increased with an infusion of alloxan (75 mg/kg). The resulting K fc values (in milliliters ⋅ min−1 ⋅ cmH2O−1 ⋅ 100 g dry lung weight−1) measured by using Std and BC gravimetric techniques before vs. after alloxan infusion we

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Yakovlev, Ye O., V. M. Yermakov, and O. A. Ulytskyi. "ECOLOGICAL CONSEQUENCES ATOMIC EXPLOSION CHAMBER FLOODING OF MINE “YUNCOM” (CENTRAL DONBAS)." Мінеральні ресурси України, no. 1 (April 25, 2019): 38–44. http://dx.doi.org/10.31996/mru.2019.1.38-44.

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Authors analyzed of ecological hydrogeological conditions of coal mine Yuncom underground nuclear blast chamber flooding and possible risk of the ground and surface water contamination.An analysis of the compatible graphs of semi-logarithmic dependences lg S0/St) of the time observation of the levels rise in the mines of the NTGS according to the analytical model that was developed on the example of flooding of the Stakhanov group of mines indicates their hydrodynamic analogy and the possibility of separation of three principal phases of the hydraulically-filtration process of the Donbas mines

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