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Journal articles on the topic 'Effect of sulphates on'

Author: Grafiati

Published: 4 June 2021

Last updated: 29 July 2025

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1

PIEPKORN, Michael, Peter HOVINGH, L. Kelly BENNETT, Alejandro ARUFFO, and Alfred LINKER. "Chondroitin sulphate composition and structure in alternatively spliced CD44 fusion proteins." Biochemical Journal 327, no. 2 (1997): 499–506. http://dx.doi.org/10.1042/bj3270499.

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Previous studies have indicated that CD44 isoforms, spliced with variant exons, are heterogeneously glycanated with chondroitin sulphate and heparan sulphate chains. Because such alternative splicing may regulate divergent biological effects of the specific isoforms, we analysed the consequences of this process on the composition and structure of the chondroitin-sulphate chains. Recombinant chimaeras were engineered with and without exons V3-10 or V3,8-10 and expressed as Ig fusion proteins in COS cells. In addition, the chondroitin sulphates of wild-type isoforms were contrasted with those of

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2

Hiebert, Linda M., and Ji-Min Liu. "Dextran Sulphates Protect Porcine Arterial Endothelial Cells from Free Radical Injury." Human & Experimental Toxicology 13, no. 4 (1994): 233–39. http://dx.doi.org/10.1177/096032719401300402.

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1 The ability of dextran sulphate to protect cultured porcine arterial endothelial cells injured by addition of xanthine and xanthine oxidase (X/XO) or hydrogen peroxide to cell medium was examined using a variety of drug preparations. Cell damage was assessed by determining cell viability (by trypan blue exclusion) and release of lactate dehydrogenase into the medium. 2 Dextran sulphates of average molecular weight (Mr) 5000, 8000 (hydrogenated or unhydrogenated) at 0.05, 0.5, 5 and 50 μg ml-1 medium, added 24 h prior to X/XO, protected cells, whereas dextran sulphate Mr 500,000 was protectiv

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3

Iacoviello, Licia, Maria Cristina D'Adamo, Krystyna Pawlak, et al. "Antithrombotic Activity of Dermatan Sulphates, Heparins and their Combination in an Animal Model of Arterial Thrombosis." Thrombosis and Haemostasis 76, no. 06 (1996): 1102–7. http://dx.doi.org/10.1055/s-0038-1650713.

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SummaryDermatan sulphates have been shown to inhibit thrombus formation and thrombus growth in different experimental models of venous thrombosis. At variance with heparins, they show a remarkably low haemorrhagic potential. On the other hand, very few data are available on the effect of dermatan sulphates on arterial thrombus formation. We evaluated the effects of a low molecular weight (LMW)-dermatan sulphate, a high molecular weight (HMW)-dermatan sulphate and sulo-dexide (a mixture of fast-moving heparin fraction and dermatan sulphate) in comparison with LMW- and HMW-heparin, in a model of

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4

Mikšík, Ivan, Šárka Kubinová, Marine Morvan, et al. "Analysis of Chondroitin/Dermatan Sulphate Disaccharides Using High-Performance Liquid Chromatography." Separations 7, no. 3 (2020): 49. http://dx.doi.org/10.3390/separations7030049.

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Chondroitin sulphates belong to a group of naturally occurring glycosaminoglycans and play a role in many physiological processes including ageing and the effects of various diseases. Research into chondroitin sulphates has found that the most important analytes are 4- and 6-sulphated disaccharides. We developed an HPLC method for the separation and quantification of underivatized chondroitin/dermatan sulphates—unsaturated disaccharides (4- and 6-sulphated disaccharides). This method is based on the separation of disaccharides by amido as well as amino columns under acidic conditions. These co

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5

Shum, D. K. Y., and M. D. I. Gohel. "Separate Effects of Urinary Chondroitin Sulphate and Heparan Sulphate on the Crystallization of Urinary Calcium Oxalate: Differences between Stone Formers and Normal Control Subjects." Clinical Science 85, no. 1 (1993): 33–39. http://dx.doi.org/10.1042/cs0850033.

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1. Urinary glycosaminoglycans were recovered from the papain digest of polyanions precipitated sequentially by cetylpyridinium chloride and sodium acetate-saturated ethanol. Those from the early morning urine of 48 stone formers and 43 normal control subjects measured 11 and 16 μg of uronic acid/ml of urine, respectively. 2. Preparative agarose gel electrophoresis of the recovered glycosaminoglycans in barium acetate buffer (pH 5.8) yielded fractions containing purely chondroitin sulphate, co-polymeric chondroitin/dermatan sulphates and heparan sulphate. Identification was based on the suscept

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6

Montoya Zuluaga, Paula Andrea, and Juan Guillermo Castaño Gonzalez. "Validation of a chromatographic method and its use in the determination of sulphates in the products of atmospheric corrosion of zinc exposed to SO2 and NO2." Revista Facultad de Ingeniería Universidad de Antioquia, no. 33 (November 3, 2005): 84–96. http://dx.doi.org/10.17533/udea.redin.344316.

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The role of SO2 and NO2 in the atmospheric corrosion of zinc was studied by determining sulphates as the main products of corrosion when this metal is exposed to atmospheres containing SO2 and NO2. Scanning Electron Microscopy (SEM/EDX) and Ion Exchange Chromatography (IC) were used as instrumental techniques. The former was used to establish the morphology and the elementary qualitative determination of corrosion products, and the latter to quantify sulphates. Before conducting the chromatographic analyses a series of parameters such as selectivity, linearity, precision, accuracy, limit of qu

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7

M. Uday Bhaskar, Ipsita Bose Roy Choudhury,. "Effect of Sulphate Attack on Self Compacting Concrete." Tuijin Jishu/Journal of Propulsion Technology 44, no. 3 (2023): 321–32. http://dx.doi.org/10.52783/tjjpt.v44.i3.278.

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Many current structures are characterized by the complexity of architecture (various shapes and bends) and a high concentration of reinforcement which often makes it difficult to use concrete with conventional plasticity. Recent researches have been conducted in order to adopt concrete to these structures. The resulting concrete formulations are characterized by better workability, while remaining stable with mechanical properties and durability. This new type of concrete can fit in place under the influence of gravity, hence the term self compacting concrete “SCC”. The external attack o

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8

Pitha, J., and R. Anand. "Alpha-Cyclodextrin Sulphate, an anti-HIV Agent, Retains its Antiviral Effect in the Presence of Hydrocortisol Phosphate." Antiviral Chemistry and Chemotherapy 4, no. 1 (1993): 65–66. http://dx.doi.org/10.1177/095632029300400108.

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Cyclodextrin sulphates alpha (a) and beta (b) were found to be inhibitors of replication of human immunodeficiency virus (HIV-1) in phytohaemagglutinin (PHA)-stimulated human peripheral blood mononuclear cells (PBMC); the same cells were also stimulated to proliferate (Anand et al., 1990). B-Cyclodextrin sulphate was also found to stimulate another, more complex, cell proliferation-neovascularization process in rabbit cornea (Folkman et al., 1989). Since the process of neovascularization is generally associated with progression of tumour growth and other pathologies, it is obvious that its sti

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9

Zarubica, Aleksandra, and Goran Boskovic. "Precursor type affecting surface properties and catalytic activity of sulfated zirconia." Acta Periodica Technologica, no. 38 (2007): 105–13. http://dx.doi.org/10.2298/apt0738105z.

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Zirconium-hydroxide precursor samples are synthesized from Zr-hydroxide, Zr-nitrate, and Zr-alkoxide, by precipitation/impregnation, as well as by a modified sol-gel method. Precursor samples are further sulphated for the intended SO4 2- content of 4 wt.%, and calcined at 500-700oC. Differences in precursors? origin and calcination temperature induce the incorporation of SO4 2- groups into ZrO2 matrices by various mechanisms. As a result, different amounts of residual sulphates are coupled with other structural, as well as surface properties, resulting in various catalytic activities of sulpha

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10

Persson, Dan, Dominique Thierry, and Nathalie LeBozec. "The Effect of Microstructure on Local Corrosion Product Formation during Initial SO2-Induced Atmospheric Corrosion of ZnAlMg Coating Studied by FTIR-ATR FPA Chemical Imaging." Corrosion and Materials Degradation 4, no. 3 (2023): 503–15. http://dx.doi.org/10.3390/cmd4030026.

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The initial atmospheric corrosion of ZM (ZnAlMg)-coated steel in humid air (85% RH) and humid argon (85% RH) containing 320 ppb SO2 was studied using in situ infrared reflection absorption spectroscopy (IRRAS), FTIR-ATR focal plane array (FPA) imaging and SEM-EDS. The corrosion products formed in humid air containing SO2 are mainly composed of magnesium sulphites and sulphates, with sulphite-containing corrosion products formed initially while the contribution from sulphates increased with exposure time. The results from FTIR-FPA imaging and SEM-EDS showed that the magnesium sulphite and sulph

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11

SMART, M. E., R. COHEN, D. A. CHRISTENSEN, and C. M. WILLIAMS. "THE EFFECTS OF SULPHATE REMOVAL FROM THE DRINKING WATER ON THE PLASMA AND LIVER COPPER AND ZINC CONCENTRATIONS OF BEEF COWS AND THEIR CALVES." Canadian Journal of Animal Science 66, no. 3 (1986): 669–80. http://dx.doi.org/10.4141/cjas86-074.

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Pregnant Hereford cows (n = 99) and heifers (n = 98) whose ration contained 10 mg Cu kg−1 DM and 20 mg Zn kg−1 DM were assigned to two treatments. The water supply (sulphated water) for one group contained 500 mg S L−1 as sulphates. The sulphates in the water (desulphated) for the other group had been decreased to 42 mg S L−1 by reverse osmosis. Changes in plasma and liver copper and zinc concentrations were monitored in the cows and their calves during the winter drylot and pasture periods. The initial plasma and liver copper concentrations in all cows indicated a deficient status. At calving

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12

Bossennec, V., M. Petitou, and B. Perly. "1H-n.m.r. investigation of naturally occurring and chemically oversulphated dermatan sulphates. Identification of minor monosaccharide residues." Biochemical Journal 267, no. 3 (1990): 625–30. http://dx.doi.org/10.1042/bj2670625.

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The 1H-n.m.r. spectra of various dermatan sulphate preparations present, besides the major signals of the basic disaccharide unit, several other minor signals. We have assigned most of them by n.m.r., using two-dimensional proton-proton double-quantum-correlation and nuclear-Overhauser-effect spectroscopy experiments. This allowed us to identify 2-O-sulphated L-iduronic acid and D-glucuronic acid residues as well as 6-sulphated N-acetylgalactosamine (presumably 4-O-sulphated as well). 2-O-Sulphated iduronic acid was present to similar extents (6-10% of total uronic acids) in pig skin dermatan

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13

Wegrowski, Y., V. Paltot, P. Gillery, B. Kalis, A. Randoux, and F. X. Maquart. "Stimulation of sulphated glycosaminoglycan and decorin production in adult dermal fibroblasts by recombinant human interleukin-4." Biochemical Journal 307, no. 3 (1995): 673–78. http://dx.doi.org/10.1042/bj3070673.

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Interleukin-4 (IL-4) is a pleiotropic cytokine expressed by inflammatory cells. Previous work from our laboratory has shown that it stimulates collagen synthesis in fibroblasts. Here we report the effects of recombinant human IL-4 on glycosaminoglycan (GAG) and proteoglycan synthesis in normal dermal fibroblasts from adult donors. IL-4 (10 and 100 units/ml) induced a dose-dependent increase of [3H]glucosamine and [35S]sulphate incorporation into total GAGs. The analysis of the different GAG fractions indicated the enhanced synthesis of dermatan/chondroitin sulphates. IL-4 had no effect on hyal

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14

Oni, Daniel, John Mwero, and Charles Kabubo. "The Effect of Cassava Starch on the Durability Characteristics of Concrete." Open Civil Engineering Journal 14, no. 1 (2020): 289–301. http://dx.doi.org/10.2174/1874149502014010289.

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Background: Concrete is a common material used in the construction of marine structures, such as bridges, water treatment plants, jetties, etc. The use of concrete in these environment exposes it to attack from chemicals like sulphates, chlorides and alkaline, thereby causing it to deteriorate, and unable to perform satisfactorily within its service life. Hence, the need to investigate the durability properties of concrete has become necessary especially when admixtures are used to modify some of its properties. Objective: This research work investigates the effect of Cassava Starch (CS) on th

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15

Janowska-Renkas, Elżbieta. "Impact of Sulphate Ions Content on Performance of Maleic and Acrylic Superplasticizers in Cement Paste." Materials 14, no. 10 (2021): 2683. http://dx.doi.org/10.3390/ma14102683.

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The paper presents test results of the impact of sulphate ions from calcium sulphates: Hemihydrate, dihydrate and anhydrite, on rheological properties and hydration heat of cement pastes with, and without, superplasticizers, derivatives of maleic (SP-2) and acrylic (SP-1) acids. It is demonstrated that cement pastes fluidity depends on superplasticizer chemical structure, and its effect is expressed by a hydrophilic coefficient. As maleic superplasticizers have flexible comb-like structure composed of a shorter backbone chain containing COO− carboxylate groups and very long side chains, cement

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16

Scully, M. F., V. Ellis, N. Seno, and V. V. Kakkar. "Effect of oversulphated chondroitin and dermatan sulphate upon thrombin and factor Xa inactivation by antithrombin III or heparin cofactor II." Biochemical Journal 254, no. 2 (1988): 547–51. http://dx.doi.org/10.1042/bj2540547.

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The kinetics of inhibition of human thrombin and Factor Xa by antithrombin III or heparin cofactor II were examined under pseudo-first-order conditions as a function of the concentration of naturally occurring oversulphated chondroitin and dermatan sulphates. The sulphated glycosaminoglycans (GAGs) studied were chondroitin sulphate D (CSD) (GlcA-2-SO4-GalNAc-6-SO4), chondroitin sulphate K (CSK) (GlcA-3-SO4-GalNAc-4-SO4), chondroitin sulphate H (CSH) (IdA-GalNAc-4,6-diSO4) and polysulphated dermatan sulphate (DPS) (IdA-2-SO4 or -3-SO4-GalNAc-4,6-diSO4). The data for the antithrombin III inhibit

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17

Yang, Y.-W., and J.-C. Yang. "Inhibitory Effect of Polyionic Compounds on the Adsorption of Herpes Simplex Virus Type 1 (KOS)." Antiviral Chemistry and Chemotherapy 8, no. 1 (1997): 32–37. http://dx.doi.org/10.1177/095632029700800103.

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The polyionic compounds, including dextran sulphates and poly-L-lysines, were evaluated for their inhibitory effect on the cytopathic effect of herpes simplex virus (HSV-1, KOS) in vitro. The anti-HSV activities of poly-L-lysines were found to increase with increasing molecular weight of the polymers. Both dextran sulphates and poly-L-lysines were found to block adsorption of HSV-1 to Vero cells. The inhibitory effect of adsorption of [3H] labelled virus was related to the molecular weight of the polymers. Polymers of higher molecular weight were found to be more effective than the lower molec

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18

MODAIHSH, A. S. "FOLIAR APPLICATION OF CHELATED AND NON-CHELATED METALS FOR SUPPLYING MICRONUTRIENTS TO WHEAT GROWN ON CALCAREOUS SOIL." Experimental Agriculture 33, no. 2 (1997): 237–45. http://dx.doi.org/10.1017/s001447979700001x.

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A field experiment was conducted from 1992 to 1994 to study the effect of supplying micronutrients to wheat (Triticum aestivum L., cv. Yecora rojo) grown on calcareous soil. Chelated and/or non-chelated forms of Fe, Mn, Zn and Cu were administered through a wide range of foliar applications, sprayed either individually or in combination. All the chelated micronutrients were applied in the form of EDTA with the exception of Fe (EDDHA). However, all the non-chelated elements were in the form of sulphate. The grain yield was significantly increased by the application of individual micronutrients

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19

Abhishek, Chowfin, Gluvakovic Nikola, and Gayh Ulrike. "Effect of Rainfall on Water Parameters in Recreational Lakes in Heidelberg, Germany." IgMin Research 2, no. 2 (2024): 121–26. http://dx.doi.org/10.61927/igmin153.

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This study evaluates the impact of precipitation on water quality in Heidelberg, Germany’s recreational lakes during sporadic rainfall events from August to September 2023. Data were collected from five stations, monitoring physicochemical properties and nutrient levels before and after rainfall. Measurements of dissolved oxygen, pH, conductivity, and redox potential were conducted in situ, while turbidity, nitrates, phosphates, sulphates, zinc, and copper levels were analyzed in the SRH Heidelberg water laboratory. Findings indicate pH levels increased due to dilution effects, while conductiv

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20

Zelená, E., M. Holasová, F. Zelený, et al. "Effect of Sulphur Fertilisation on Lycopene Content and Colour of Tomato Fruits." Czech Journal of Food Sciences 27, Special Issue 1 (2009): S80—S84. http://dx.doi.org/10.17221/915-cjfs.

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The effects of different sulphur (S) fertilisers (ammonium, sodium, potassium and calcium sulphates) in combination with nitrogen (N) on plant growth, yield and quality of fruits were investigated in two dwarf cultivars Proton and Šejk. Single N, applied as ammonium nitrate, stimulated growth of plants and significantly increased yield of fruits, but did not change content of lycopene as well as colour parameters (<I>a*, b*</I> and <I>L*</I>) and decreased significantly S content in fruits. All S fertilisers significantly increased S and lycopene content in fruits (up t

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21

Siwik-Ziomek, Anetta, Joanna Lemanowicz, and Jan Koper. "Arylsulphatase activity and sulphate content in relation to crop rotation and fertilization of soil." International Agrophysics 30, no. 3 (2016): 359–67. http://dx.doi.org/10.1515/intag-2015-0098.

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Abstract The aim of the study was to investigate the effect of varying rates of FYM (0, 20, 40, 60 Mg ha−1) and nitrogen N0, N1, N2, and N3 on the content of sulphate sulphur (VI) and the activity of arylsulphatase, which participates in the transformations of this element in Haplic Luvisol. The study report is based on a long-term field experiment with two different crop rotations: A – recognized as exhausting the humus from soil and B – recognized as enriching the soil with humus. During the cultivation of the plants, the soil was sampled four times from corn and a red clover cultivar and gr

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22

Conic, Vesna, Branka Pesovski, Vladimir Cvetkovski, et al. "Lead sulphate leaching by sodium chloride solution." Chemical Industry 67, no. 3 (2013): 485–94. http://dx.doi.org/10.2298/hemind120503096c.

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Bioleaching treatment of complex multi-metallic Cu-Zn-Pb-Ag-Au mineral concentrates leds to the formation, besides easily soluble zinc and cooper sulphates, of hardly soluble lead (II) sulfate (PbSO4) sludge. To determine the leaching parameters of PbSO4 with NaCl in the bioleaching residue, lead sulphate solution was synthetically prepared. The effect of process parameters, namely NaCl concentration, solid:liquid phase ratio, processing time, temperature and Cl ions was examined. It was found that 100% Pb by leaching can be achieved with NaCl concentration of 250 g/dm3, time 20 min, temperatu

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23

Al-saffar, Farqad Yousuf, Leong Sing Wong, and Suvash Chandra Paul. "An Elucidative Review of the Nanomaterial Effect on the Durability and Calcium-Silicate-Hydrate (C-S-H) Gel Development of Concrete." Gels 9, no. 8 (2023): 613. http://dx.doi.org/10.3390/gels9080613.

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Concrete as a building material is susceptible to degradation by environmental threats such as thermal diffusion, acid and sulphate infiltration, and chloride penetration. Hence, the inclusion of nanomaterials in concrete has a positive effect in terms of promoting its mechanical strength and durability performance, as well as resulting in energy savings due to reduced cement consumption in concrete production. This review article discussed the novel advances in research regarding C-S-H gel promotion and concrete durability improvement using nanomaterials. Basically, this review deals with top

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24

Zarubica, Aleksandra, Jugoslav Krstic, Dejan Popovic, et al. "Influence of alumina addition on structural and catalytic properties of sulphated zirconia in isomerization of n-hexane." Processing and Application of Ceramics 15, no. 2 (2021): 111–19. http://dx.doi.org/10.2298/pac2102111z.

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New binary catalytic systems based on sulphated zirconia-alumina were synthesized by controlled hydrolysis of alkoxides using relative molar ratios of constituents 1:1, 1:2 and 1:3 in favour of zirconia. The obtained differences in the final catalytic material?s properties may be related to organic precursor memory effect, the applied calcinations temperatures and used alumina contents. The addition of alumina to zirconia affected the structural and surface properties stabilizing bare zirconia by means of slower phase transformation of tetragonal zirconia crystal phase into monoclinic one, fur

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25

MacKinnon, D. J., and J. M. Brannen. "Effect of manganese, magnesium, sodium and potassium sulphates on zinc electrowinning from synthetic acid sulphate electrolytes." Hydrometallurgy 27, no. 1 (1991): 99–111. http://dx.doi.org/10.1016/0304-386x(91)90081-v.

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26

Merida, Ahcene, Fattoum Kharchi, and Rabah Chaid. "Durability of High Performance Concrete in an Aggressive Environment." Key Engineering Materials 600 (March 2014): 485–94. http://dx.doi.org/10.4028/www.scientific.net/kem.600.485.

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In Algeria, locally available natural pozzolan of volcanic origin material has the potential for use in environmental friendly concrete as a partial cement replacement. This paper studies the effect of replacement level of pozzolan concrete in sulphated environment. The natural pozzolan has a marked influence on the properties of the concrete. When it is coupled to a water reducing superplasticizer by a correct adjustment of the composition, it greatly improves the concrete properties. The analysis of experimental results on pozzolan concrete at 5% content and fineness of 9565 cm2/g exposed in

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27

Yoshida, K., R. Tahara, T. Nakayama, and T. Yanaihara. "Effect of Dehydroepiandrosterone Sulphate, Oestrogens and Prostaglandins on Collagen Metabolism in Human Cervical Tissue in Relation to Cervical Ripening." Journal of International Medical Research 21, no. 1 (1993): 26–35. http://dx.doi.org/10.1177/030006059302100103.

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To clarify the mechanism of cervical ripening at term, collagenase activity in human cervical tissue was studied. The effects of steroids and prostaglandins on collagenase activity were also examined. Collagenase activities in cervical tissues obtained from non-pregnant ( n = 5) and pregnant women (early-pregnant, n = 3; late-pregnant, n = 14) were measured, with or without the addition of steroids and prostaglandins into the incubation medium prior to the measurement of enzyme activity. The enzyme activity was significantly (P < 0.01 − 0.05) higher in the cervical tissue obtained from late

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28

Ault, A. R., E. J. Frazer, and G. D. J. Smith. "Effect of sodium and potassium sulphates on zinc electrowinning." Journal of Applied Electrochemistry 18, no. 1 (1988): 32–37. http://dx.doi.org/10.1007/bf01016202.

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WEBBORN, PETER J. H., ANTHONY H. OLAVESEN, GILLIAN M. POWELL, C. GERALD CURTIS, DOUGLAS HOWES, and J. GORDON BLACK. "Positional effects of the sulphate moiety on the metabolism of tridecan sulphates." Biochemical Society Transactions 13, no. 5 (1985): 891–92. http://dx.doi.org/10.1042/bst0130891.

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Bonney, R. C., and S. Franks. "Hydrolysis of phosphatidylinositol by human endometrium: modulating effects of steroids on arachidonic acid and 1,2-diacylglycerol release." Journal of Endocrinology 117, no. 2 (1988): 309–14. http://dx.doi.org/10.1677/joe.0.1170309.

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ABSTRACT Phospholipase C and 1,2-diacylglycerol lipase activities were demonstrated in human endometrium using 1-stearoyl-2-[1-14C]arachidonyl phosphatidylinositol as substrate. Phosphatidylinositol is hydrolysed by phospholipase C to inositol phosphates and to 1,2-diacylglycerol which is then further metabolized by 1,2-diacylglycerol lipase to release free arachidonic acid. In the present study the radiolabelled products formed (1,2-diacylglycerol and arachidonic acid) were measured following chloroform/methanol extraction and thin-layer chromatography. Phospholipase C activity was calcium de

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31

Skipin, Leonid, Vera Petukhova, Elena Gaevaya, Elena Zakharova, and Aleksandr Mitrikovskiy. "Comparative Effect of Different Coagulants on Physical Properties of Drill Cuttings." Materials Science Forum 871 (September 2016): 233–41. http://dx.doi.org/10.4028/www.scientific.net/msf.871.233.

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The paper presents the study on the physical properties of the cuttings. Culvert capacity of the drill cuttings with different coagulants is considered. The water permeability of the studied samples varies depending on the quality of the composition and the dosage of a coagulant used. The coagulants have been proposed as aluminium sulphate, iron sulphate, calcium chloride, gypsum, phosphogypsum, serpentine, blast furnace slag, calcium carbonate and carnallite. Iron and aluminium sulphates, calcium chloride, gypsum and phosphogypsum appear to be the most effective when acting on the water perme

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32

Narimane, Zaidi, Hamma Zedira, J. P. Castro-Gomez, Boudjema Bezzazi, Aissa Talah, and Mohammed Amin Benbouras. "Evolution of durability and mechanical properties of ordinary portland cement concretes in sulphates attack." Engineering review 40, no. 3 (2020): 32–41. http://dx.doi.org/10.30765/er.40.3.04.

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Concrete in sulphates environments often undergoes significant alterations that often have significant adverse results on its engineering properties. However, the choice of cement type is a very important factor for concrete exposed in aggressive environment. This research presents the effect of two types of cement on the mechanical and microstructure properties of ordinary concretes exposed in aggressive solution dosed with 5% of gypsum (Ca2SO4.2H2O). The tests studied in this experimental part were the compressive strength, flexural strength, thermogravimetry, mercury intrusion porosimetry a

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33

Tribulová, Tereza, František Kačík, Dmitry V. Evtuguin, and Iveta Čabalová. "Influence of Chemical Treatment on Chemical Changes of Fir Wood." Key Engineering Materials 688 (April 2016): 38–43. http://dx.doi.org/10.4028/www.scientific.net/kem.688.38.

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Many chemicals are used to prolong wood lifetime and protect wood against wood-destroying organisms and fire but there is not sufficient information about their possible corrosive effects on wood and its structural components from the perspective of long-term exposition in unsuitable condition. This study evaluated the combined effects of inorganic chemicals (borates, phosphates containing ammonia, sulphates with metal cations, chlorides) and wet-thermal accelerated ageing (T=80 °C, RH=65 %, for 30 days) on chemical composition of treated wood. Used analyses indicated that selected chemicals c

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Wild, S., J. M. Kinuthia, R. B. Robinson, and I. Humphreys. "Effects of ground granulated blast furnace slag (GGBS) on the strength and swelling properties of lime-stabilized kaolinite in the presence of sulphates." Clay Minerals 31, no. 3 (1996): 423–33. http://dx.doi.org/10.1180/claymin.1996.031.3.12.

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AbstractThe use of ground granulated blast furnace slag (ggbs) is well established in many cement applications where it provides enhanced durability, including high resistance to chloride penetration, resistance to sulphate attack and protection against alkali silica reaction (ASR). The use of ggbs in soil stabilization is, however, still a novel process in the UK although it has been used in South Africa. This paper reports on efforts to extend the use of ggbs to highway and other foundation layers by determining the beneficial effect which it has on the reduction of expansion due to the pres

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Anderson, J. S., D. M. Anderson, and J. M. Murphy. "The effect of water quality on nutrient availability for grower/finisher pigs." Canadian Journal of Animal Science 74, no. 1 (1994): 141–48. http://dx.doi.org/10.4141/cjas94-021.

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Two 6 × 6 Latin square experiments were conducted with male grower/finisher pigs (initial weight approximately 45 kg) to determine the effects of increasing levels of total dissolved solids (TDS) in water on the partitioning of nutrients from the diet. The first experiment consisted of six water treatments, 0 (distilled water), 370 (tap water), 1000, 4000, 6350, and 8000 ppm TDS. The increased TDS levels were obtained by the addition of sodium bicarbonate, sodium chloride, and sodium sulphate (in the ratio 3:3:1) to the tap water. At these levels there was no significant treatment effect (P &g

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Saleh Al-Attar, Tareq, Basil Salah Mehdi, and Mohammed Frayyeh Hattab. "EFFECT OF EXTERNAL SULPHATES ON PROPERTIES OF LIME-POZOLANA CONCRETE." Journal of Engineering and Sustainable Development 23, no. 05 (2019): 42–54. http://dx.doi.org/10.31272/jeasd.23.5.4.

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Rajasekaran, G., K. Murali, and R. Srinivasaraghavan. "Effect of Chlorides and Sulphates on Lime Treated Marine Clays." Soils and Foundations 37, no. 2 (1997): 105–15. http://dx.doi.org/10.3208/sandf.37.2_105.

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Srinivas, T., Thandra Arun, and N. V. Ramana Rao. "Effect of Sugarcane Bagasse Fibre on the Behavior of Geopolymer Concrete under Sulphate Attack." E3S Web of Conferences 309 (2021): 01106. http://dx.doi.org/10.1051/e3sconf/202130901106.

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The use of various fibres such as steel, glass, sugarcane bagasse, and others has a considerable impact on the fresh and hardened properties of concrete. Sugarcane bagasse fibre is a byproduct from the sugarcane industry that can be reused as a concrete fibre. This paper objective is to work on the behaviour of sugarcane bagasse fibre on low calcium fly ash and slag based geopolymer concrete of G40 which is equivalent to M40 grade, when it is exposed to 5% sulphate attack with the help of experiments. The specimens were casted, GPC and GPCF Cured in an oven at 60 ° C for 24 hours, then let to

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SUD'INA, Galina F., Thomas G. BROCK, Marina A. PUSHKAREVA, et al. "Sulphatides trigger polymorphonuclear granulocyte spreading on collagen-coated surfaces and inhibit subsequent activation of 5-lipoxygenase." Biochemical Journal 359, no. 3 (2001): 621–29. http://dx.doi.org/10.1042/bj3590621.

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Sulphatides are sulphate esters of galactocerebrosides that are present on the surfaces of many cell types and act as specific ligands to selectins. The present study was undertaken to investigate the effect of sulphatides on polymorphonuclear granulocyte (PMN) attachment, spreading and 5-lipoxygenase (5-LO) metabolism. Sulphatides, but not non-sulphated galactocerebrosides, dose-dependently enhanced attachment to collagen, as measured by the myeloperoxidase assay. Studies with blocking antibodies indicated that the increased attachment was mediated by CD11b/CD18 (Mac-1) β2 integrin. Scanning

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Hawkins, A. B., and G. M. Pinches. "Timing and Correct Chemical Testing of Soils/Weak Rocks." Geological Society, London, Engineering Geology Special Publications 2, no. 1 (1986): 273–77. http://dx.doi.org/10.1144/gsl.1986.002.01.49.

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AbstractExperiments to explain the rise in the floor of a hospital built on calcareous black pyritic shales have substantiated the reported chemical changes which bring about the formation of selenite (gypsum) along bedding planes. The experiments have also indicated that the sulphate content of a weak rock is not constant and depends on the weathering state.If the long-term importance of sulphates is to be determined there is strong evidence that it is the maximum potential S03 or total sulphur that should be assessed as this would be more beneficial than simply acquiring the S03% as is curre

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Antov, Mirjana, Draginja Pericin, and Biljana Trbojevic. "The effect of sulphates on partitioning of pectinases in aqueous two-phase systems." Acta Periodica Technologica, no. 35 (2004): 179–86. http://dx.doi.org/10.2298/apt0435179a.

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The effect of various sulphate salts on the partitioning of endo-pectinase and exo-pectinase in aqueous two-phase systems, composed of polyethylene glycol and dextran, was studied. Presence of ammonium sulphate and sodium sulphate at concentration 15 mmol/l in the system polyethylene glycol 4000/crude dextran, at tie-line length 7.44%, increased partition coefficient of endo-pectinase 1.25 and 1.2 fold, respectively. Ammonium sulphate at 15 mmol/l and sodium sulphate at 5 mmol/l enhanced partition coefficient for exo-pectinase for about 60% in comparison to the system without salts. Addition o

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Kyaw, Zay Ya, Alexander A. Nikolaev, Zaw Oo Htet, and Kyaw Kyaw Phyo. "Study of the Effect of Copper (II), Zinc and Iron (II) Sulphates on the Froth Flotation of Sphalerite by Sulfhydryl Collectors." Key Engineering Materials 910 (February 15, 2022): 551–56. http://dx.doi.org/10.4028/p-ny5paw.

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The practice of benefication of copper-zinc ores has established that the production of high-quality zinc concentrates is impossible without the addition of sphalerite and pyrite modifiers to various flotation operations. This article present the result of study of the effect of copper (II), zinc and iron (II) sulfate on the froth flotation of sphalerite by sulfhdryl collectors. Typically, it is achieved through optimisation of flotation circuits, installation of modern equipment and changing the flotation reagents modes. Therefore, the floatability of sphalerite in an alkaline lime medium was

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Mlitan, Abdulmajeed, Asma Alktit, Mnal Ehwadir, Amal Banosh, and Enas Habuba. "Negative Effect Of Ponds Water On Environment." Journal of Pure & Applied Sciences 22, no. 3 (2023): 275–79. http://dx.doi.org/10.51984/jopas.v22i3.2832.

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This study assesses the rainwater ponds with comparison of water samples were taken back from the rainwater right after it fell. In addition, it will investigate the effect of negative effect of ponds rain water. After rainwater falling to the ground and being exposed to natural or industrial activities. This work examined this water Chemical, Physical and Biological properties. Field experiment was conducted in Misurata region in central Libya. The ponds rain water physicochemical parameters such as, acidic number (PH), Total dissolved salts (TDS), Electrical conductivity (E.C), Sulphates (So

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Ren, Xiaodan, Ping Li, Jianbo Li, Xiaoyi Yang, Chaohua Guo, and Quanhong Li. "Effect of Oxyethylene Groups of Fatty Alcohol Polyoxyethylene Ether Sodium Sulfates on Equilibrium and Dynamic Surface Tension in Relation to Wetting Properties." Tenside Surfactants Detergents 58, no. 5 (2021): 394–400. http://dx.doi.org/10.1515/tsd-2020-2343.

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Abstract The effect of hydrophilic chain of surfactants fatty alcohol polyoxyethylene ether sodium sulphates (AEnS, n = 2, 3, 7) on surface properties and wetting properties was investigated by the measurement of equilibrium surface tension, dynamic surface tension and dynamic contact angle. The fatty alcohol polyoxyethylene ether sodium sulphates with different head group sizes were used. From the results of equilibrium surface tension measurements, we could obtain the critical micellisation concentration, adsorption efficiency, maximum surface excess concentration and Langmuir equilibrium ad

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Hartman, Miloslav, Václav Veselý, and Karel Jakubec. "Thermal decomposition and chemism of hydronium jarosite." Collection of Czechoslovak Chemical Communications 52, no. 4 (1987): 939–48. http://dx.doi.org/10.1135/cccc19870939.

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A study is reported of the controlled decompositions and chemism of the technological hydronium jarosite. Chemical and spectroscopic methods were employed to determine the amounts of impurities present in jarosite. Thermogravimetric data were amassed both in the increasing and constant temperature mode. Proposed kinetic equations of Arrhenius type were tested against the results of constant temperature experiments. Differences are explored in the course of the decomposition of hydronium jarosite and that of pure ferric sulphate enneahydrate. In addition, the effects of temperature and reaction

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Bureš, R., P. Rak, and J. Stoulil. "Long-term outdoor exposure of artificial copper patina based on brochantite." Koroze a ochrana materialu 64, no. 3 (2020): 87–94. http://dx.doi.org/10.2478/kom-2020-0013.

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Abstract A typical green layer of patina starts to cover copper in atmosphere condition, which is aesthetically acceptable and also provides protective properties. This work investigates stability of the artificial patina layer based on sulphates prepared from a gaseous phase during two-year exposure in atmosphere condition. XRD and SEM were employed to verify the composition and morphology of artificial patina. Colour and patina coverage were compared before and after exposure also. According to results after 1 and 2 years of exposure, it is possible to see changing of hydroxyl sulphates to m

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., Mieke De Schepper. "SULPHATES IN COMPLETELY RECYCLABLE CONCRETE AND THEIR EFFECT ON THE CLINKER MINERALOGY." International Journal of Research in Engineering and Technology 03, no. 25 (2014): 142–47. http://dx.doi.org/10.15623/ijret.2014.0325023.

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Saillio, Mickael, Véronique Baroghel-Bouny, and Sylvain Pradelle. "Effect of Carbonation and Sulphate on Chloride Ingress in Cement Pastes and Concretes with Supplementary Cementitious Materials." Key Engineering Materials 711 (September 2016): 241–48. http://dx.doi.org/10.4028/www.scientific.net/kem.711.241.

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The main cause of premature deterioration of reinforced concrete structures is the corrosion of steel bars, induced by chloride ions (for example in marine environment) and/or by carbonation (atmospheric CO2). At the same time, environmental-induced degradations of concrete can also affect the structure, such as sulphate attack. This can lead to the formation of ettringite, inducing expansion inside the materials and finally degradation. Carbonation, chloride and sulphate ingress are usually studied separately in the literature. This is not representative of in-situ conditions since they can o

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Zolovs, Maksims, Madara Priekule, Olesia Gasperovich, Jelena Kolesnikova, Sergejs Osipovs, and Voldemārs Spuņģis. "The Spatial Distribution of Perch (Perca fluviatilis) Ectoparasites and the Effect of Chemical Water Quality Parameters on Ectoparasite Spatial Niche Size." Proceedings of the Latvian Academy of Sciences. Section B. Natural, Exact, and Applied Sciences. 72, no. 4 (2018): 236–43. http://dx.doi.org/10.2478/prolas-2018-0034.

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Abstract Seasonal changes of abiotic factors and their influence on parasite occurrence have repeatedly been studied. Most of the studies have been conducted to evaluate the effect of water physicochemical parameters on changes in the intensity of infection, prevalence and component community of a number of parasite species. However, insufficient attention has been paid to the link between water quality parameters and spatial niche size of ectoparasites. The distribution of ectoparasite species on perch (Perca fluviatilis L.) was studied to establish whether seasonal changes of water quality p

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Stelling, J., Harald Behrens, Joachim Deubener, Stefan Mangold, and Joerg Goettlicher. "Diffusivity, Solubility and Speciation of Sulphur in Silicate Melts." Advances in Science and Technology 46 (October 2006): 93–97. http://dx.doi.org/10.4028/www.scientific.net/ast.46.93.

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Diffusion and solubility of sulphur have important effects on the degassing of silicate melts. Both properties are closely related to the structural incorporation of sulphur in the melt. Depending on the oxygen fugacity, sulphur can be present as sulphide (S2-), sulphite (S4+) or sulphate (S6+). Sulphates play an important role in the industrial production of glasses especially in the fining process. The decomposition products of sulphate amass in bubbles which ascend and homogenize the melt. Structural incorporation of sulphur in glasses is studied by XANES (X-ray Absorption Near Edge Spectro

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