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1. Determination of the zeta potential of planar solids in nonpolar liquids

Author:
Prieve, Dennis C.; Yezer, Benjamin A.; Xu, Keyi; Khair, Aditya S.; Schneider, James W.; Sides, Paul J.
Source:
Journal of colloid and interface science 2021 v.592 pp. 271-278
ISSN:
0021-9797
Subject:
zeta potential,   etc   ; electrophoresis; liquids;     Show all 3 Subjects
Abstract:
... ZetaSpin determines zeta potential by measuring the streaming potential generated by rotating a disk-shaped sample about its axis while submerged in the liquid. The apparatus and procedure developed for ZetaSpin in aqueous solutions was adapted for use in highly nonpolar fluids like surfactant-doped alkanes. Perhaps most unexpected is the need for up to 10 min (instead of a fraction of one second ...
DOI:
10.1016/j.jcis.2021.02.044

2. Inclusion of vitamin D3 (free or liposome) into white chocolate and an investigation of its stability during storage

Author:
Didar, Zohreh
Source:
Journal of food processing and preservation 2021 v.45 no.3 pp. e15231
ISSN:
0145-8892
Subject:
zeta potential,   etc   ; cholecalciferol; intestines; white chocolate;     Show all 4 Subjects
Abstract:
... This study is focused on the addition of vitamin D₃ in two forms (free or liposome) to white chocolate. Film dispersion‐homogenization was chosen to prepare liposomes containing vitamin D₃ in order to be added to white chocolate (3 µg/10 g). Quality assessment of liposome was performed. In vitro release of vitamin D₃ from liposome structure showed that vitamin D release in SGF and SIF were 7 ± 0.5 ...
DOI:
10.1111/jfpp.15231

3. How bulk nanobubbles are stable over a wide range of temperatures

Author:
Li, Mingbo; Ma, Xiaotong; Eisener, Julian; Pfeiffer, Patricia; Ohl, Claus-Dieter; Sun, Chao
Source:
Journal of colloid and interface science 2021 v.596 pp. 184-198
ISSN:
0021-9797
Subject:
zeta potential,   etc   ; acoustics; aqueous solutions; nanobubbles; shrinkage; temperature;     Show all 6 Subjects
Abstract:
... Bulk nanobubbles are nanoscopic gaseous domains in an aqueous solution. Their surprising long-term stability remains controversial due to the widespread assumption that spherical bubbles cannot achieve stable equilibrium. To uncover the intrinsic mechanisms underlying stabilization, the thermodynamic behavior of nanobubbles in water over a wide range of temperatures is explored.Bulk nanobubbles wi ...
DOI:
10.1016/j.jcis.2021.03.064

4. Preparation of spherical Ti-6Al-4V powder by RF induction plasma spheroidization combined with spray granulation

Author:
Hao, Zhenhua; Hou, Xuchu; Zhang, Qinglei; Zhu, Xingying; Zhou, Fa; Shu, Yongchun; He, Jilin
Source:
Powder technology 2021 v.387 pp. 88-94
ISSN:
0032-5910
Subject:
zeta potential,   etc   ; dispersants; pH; particle size; slurries; technology;     Show all 6 Subjects
Abstract:
... Spray granulation was used to control morphology and particle size of raw materials for spheroidization in this work. Effects of dispersant (PAA-NH₄OH) addition, pH value and solid content on stability of slurry for granulation was investigated. Influence of solid content of the slurry and atomizer speed on spray granulation were also investigated. Furthermore, difference in spheroidization effect ...
DOI:
10.1016/j.powtec.2021.04.021

5. Flotation of rhodochrosite fines induced by octyl hydroxamic acid as hydrophobic agglomerates

Author:
Zou, Song; Ma, Xin; Wang, Shuai; Zhong, Hong; Qin, Wenqing
Source:
Powder technology 2021
ISSN:
0032-5910
Subject:
zeta potential,   etc   ; geographical distribution; hydrophobicity; microscopy; particle size; rhodochrosite; technology;     Show all 7 Subjects
Abstract:
... In this study, the flotation of rhodochrosite fines induced by octyl hydroxamic acid (OHA) as hydrophobic agglomerates was investigated through the measurements of micro-flotation, laser diffraction, microscopy observations and zeta potential. The experimental results showed that the apparent particle size and morphology of rhodochrosite agglomerates were greatly affected by OHA concentration and ...
DOI:
10.1016/j.powtec.2021.04.016

6. Modelling the critical roles of zeta potential and contact angle on colloidal fouling with a coupled XDLVO - collision attachment approach

Author:
Liu, Junxia; Fan, Yaqian; Sun, Yuhui; Wang, Zhihong; Zhao, Dongsheng; Li, Tian; Dong, Bingzhi; Tang, Chuyang Y.
Source:
Journal of membrane science 2021 v.623 pp. 119048
ISSN:
0376-7388
Subject:
zeta potential,   etc   ; contact angle; energy; fouling; glycerol; models; pH; water;     Show all 8 Subjects
Abstract:
... A coupled XDLVO-collision attachment (CA) model is proposed to quantitatively evaluate the critical roles of zeta potential ζ and contact angle θ of foulant on colloidal fouling. In this model, the XDLVO theory is applied to relate ζ and θ to foulant-membrane interaction energy barrier (ΔEb). The latter is further bridged to membrane fouling rate (dmf/dt) by the CA theory, recognizing fouling as f ...
DOI:
10.1016/j.memsci.2021.119048

7. The importance of nanofiber hydrophobicity for effective fog water collection

Author:
Knapczyk-Korczak, Joanna; Szewczyk, Piotr K.; Stachewicz, Urszula
Source:
RSC advances 2021 v.11 no.18 pp. 10866-10873
ISSN:
2046-2069
Subject:
zeta potential,   etc   ; geometry; hydrophilicity; hydrophobicity; nanofibers; water harvesting;     Show all 6 Subjects
Abstract:
... To increase fog collection efficiency in a fiber system, controlled wetting properties are desirable. In this work, hydrophobic (PA11) and hydrophilic (PA6) polyamides were tested to verify the surface wetting effect on fog water collection rate. Highly porous fiber meshes were obtained from both polymer solutions. Randomly oriented fibers with average diameter of approximately 150 nm were observe ...
DOI:
10.1039/d1ra00749a

8. Effect of trace amounts of ionic surfactants on the zeta potential of DPPC liposomes

Author:
Sęk, Alicja; Perczyk, Paulina; Wydro, Paweł; Gruszecki, Wiesław I.; Szcześ, Aleksandra
Source:
Chemistry and physics of lipids 2021 v.235 pp. 105059
ISSN:
0009-3084
Subject:
zeta potential,   etc   ; anionic surfactants; chemistry; cosmetics; drugs; lipids;     Show all 6 Subjects
Abstract:
... Surfactants are commonly found in today's world as an essential component of cleaning detergents, cosmetics and drug delivery systems. They can penetrate into lipid membranes, thus changing their properties. The aim of this paper is to compare the effect of addition of small amounts of cationic (DTAB) and anionic surfactants (SDS) with the same alkyl chain length on the zeta potential of DPPC lipo ...
DOI:
10.1016/j.chemphyslip.2021.105059

9. HPP improves the emulsion properties of reduced fat and salt meat batters by promoting the adsorption of proteins at fat droplets/water interface

Author:
Yang, Hui-Juan; Han, Min-Yi; Wang, Hai-feng; Cao, Guang-tian; Tao, Fei; Xu, Xing-Lian; Zhou, Guang-Hong; Shen, Qing
Source:
Lebensmittel-Wissenschaft + [i.e. und] Technologie 2021 v.137 pp. 110394
ISSN:
0023-6438
Subject:
zeta potential,   etc   ; adsorption; disulfides; emulsions; hydrogen; hydrophobicity; meat; meat emulsions;     Show all 8 Subjects
Abstract:
... The aim of this study was to explore whether the state of the formation of interfacial protein film (IPF) could be utilized to increase the emulsion ability modified by high pressure processing (HPP). The meat emulsion was obtained from the meat batters with reduced fat and reduced salt (RFRS). The results revealed the highest stability and activity of meat emulsion were obtained as 68.12% and 76. ...
DOI:
10.1016/j.lwt.2020.110394

10. Spontaneous interaction between whey protein isolate proteins and lactoferrin: Effect of heat denaturation

Author:
Anema, Skelte G.
Source:
International dairy journal 2021 v.113 pp. 104887
ISSN:
0958-6946
Subject:
zeta potential,   etc   ; denaturation; heat; lactoferrin; turbidity; whey protein isolate;     Show all 6 Subjects
Abstract:
... Native lactoferrin (U-Lf) forms predominantly soluble complexes with native (U-WPI) or denatured (H-WPI) whey protein isolate proteins at all mixing ratios, forming weakly turbid solutions and charge neutrality at a Lf to WPI ratio of 2.0, w/w. This may be due to an asymmetrical charge spacing between the two interacting protein species, resulting in a weak interaction and soluble complexes. Denat ...
DOI:
10.1016/j.idairyj.2020.104887

11. Cesium removal using acid- and base-activated biotite and illite

Author:
Kwon, Sunki; Kim, Yumi; Roh, Yul
Source:
Journal of hazardous materials 2021 v.401 pp. 123319
ISSN:
0304-3894
Subject:
zeta potential,   etc   ; adsorption; biotite; cesium; illite; pH; seawater; surface area;     Show all 8 Subjects
Abstract:
... Biotite and illite have excellent cesium (Cs) adsorption capacity due to their negative charges in addition to adsorption sites of the planar, interlayer, and frayed edge sites (FES). The aim of this study is to investigate the Cs adsorption capacity using acid- and base-activated biotite and illite based on their mineralogical characteristics. The acid-activated biotite and base-activated illite ...
DOI:
10.1016/j.jhazmat.2020.123319

12. Steric-effect-induced enhancement of electrokinetic energy conversion efficiency in curved nanochannels with rectangular sections at high zeta potentials

Author:
Liu, Yongbo; Jian, Yongjun; Yang, Chunhong
Source:
Colloids and surfaces 2020 v.591 pp. 124558
ISSN:
0927-7757
Subject:
zeta potential,   etc   ; energy conversion; geometry;     Show all 3 Subjects
Abstract:
... In this work, we investigate the electrokinetic energy conversion in curved rectangular nanochannels at high zeta potentials, intending to increase the efficiency of electrokinetic generation. As we demonstrate, the geometry effect can have an important role in the investigations of the conversion efficiency. In addition, we consider the influences of steric effect (the effect of finite ion size) ...
DOI:
10.1016/j.colsurfa.2020.124558

13. Acid/ethanol induced pectin gelling and its application in emulsion gel

Author:
Jiang, Wen-xin; Qi, Jun-ru; Liao, Jin-song; Yang, Xiao-quan
Source:
Food hydrocolloids 2021 v.118 pp. 106774
ISSN:
0268-005X
Subject:
zeta potential,   etc   ; chemical interactions; emulsions; ethanol; freeze-thaw cycles; gels; hydrocolloids; oils; pH; pectins; urea;     Show all 11 Subjects
Abstract:
... In 25% (v/v) ethanol system, an acid induced pectin gelling mechanism was proposed in this study, which could be used to construct emulsion gel system. FT-IR, GPC, and monosaccharides analysis were used to investigated the structure of pectins. HMP and LMP are different in molecular wight and chain structure, and HMP shows excellent gelling property. Intermolecular interaction of acid/ethanol indu ...
DOI:
10.1016/j.foodhyd.2021.106774

14. The effect of sodium hexametaphosphate on the efficiency of pectin in stabilizing acidified milk drinks

Author:
Mocanu, Mariana; Rolin, Claus; Mohammadifar, Mohammad Amin; Mohammadi, Reza; Bahrami, Roya
Source:
Food hydrocolloids 2021 v.118 pp. 106767
ISSN:
0268-005X
Subject:
zeta potential,   etc   ; acidified milk; calcium; centrifugation; flocculation; hydrocolloids; particle size; pectins; sodium; synergism; viscosity;     Show all 11 Subjects
Abstract:
... The combined effect of sodium hexametaphosphate (SHMP) (0.0125%, 0.025% and 0.05% w/w) and High methoxyl (HM)-pectin (0.06–0.42% w/w) on the stability and physico-chemical properties of acidified milk drinks (AMDs) was investigated. Analytical centrifugation, particle size distributions, zeta potential, steady shear, and oscillatory rheological measurements were used to characterize the AMD sample ...
DOI:
10.1016/j.foodhyd.2021.106767

15. Characterization of surimi particles stabilized novel pickering emulsions: Effect of particles concentration, pH and NaCl levels

Author:
Liu, Cikun; Fan, Lixin; Yang, Yunyi; Jiang, Qixing; Xu, Yanshun; Xia, Wenshui
Source:
Food hydrocolloids 2021 v.117 pp. 106731
ISSN:
0268-005X
Subject:
zeta potential,   etc   ; droplet size; droplets; fish; hydrocolloids; oils; pH; soybeans; surimi;     Show all 9 Subjects
Abstract:
... Pickering emulsions stabilized by biocompatible and edible particles have received increasing attentions recently. The surimi particles were firstly prepared and then the physical characteristics of soybean oil-based emulsions stabilized by surimi particles were investigated. The visual observation of emulsions indicated the emulsified phase volume increased with increasing concentrations (0–4 wt% ...
DOI:
10.1016/j.foodhyd.2021.106731

16. Effects of tannic acid on the structure and proteolytic digestion of bovine lactoferrin

Author:
Jing, Huijuan; Huang, Xin; Jiang, Chao; Wang, Li; Du, Xiaojing; Ma, Chaoyang; Wang, Hongxin
Source:
Food hydrocolloids 2021 v.117 pp. 106666
ISSN:
0268-005X
Subject:
zeta potential,   etc   ; circular dichroism spectroscopy; digestibility; fluorescence; hydrocolloids; hydrophobicity; lactoferrin; pH; proteolysis; tannins; temperature; thermodynamics; turbidity;     Show all 13 Subjects
Abstract:
... Tannic acid (TA) can strongly interact with proteins to improve the stability of protein-based nanoparticles. In the present study, the complexation of TA with bovine lactoferrin (LF) was investigated at pH 6.0. The size and turbidity of the LF-TA complexes did not change significantly until the LF/TA molar ratio was over a critical value of 1:8. Zeta potential of LF-TA was gradually negative as t ...
DOI:
10.1016/j.foodhyd.2021.106666

17. Influence of thermal processing on the physicochemical properties of bovine lactoferrin

Author:
Goulding, David A.; O'Regan, Jonathan; Bovetto, Lionel; O'Brien, Nora M.; O'Mahony, James A.
Source:
International dairy journal 2021 v.119 pp. 105001
ISSN:
0958-6946
Subject:
zeta potential,   etc   ; calorimetry; cattle; color; endothermy; hydrophobicity; ionic strength; iron; lactoferrin; rheometers;     Show all 10 Subjects
Abstract:
... Aqueous solutions of lactoferrin (LF) were subjected to thermal processing (72, 80, 85, 95 °C for 15 s) using a rheometer. Despite the low protein concentration and low ionic strength of the LF solutions, analyses post-processing revealed the presence of heat-induced, covalently-linked, protein aggregates. Aggregation was accompanied by increased surface hydrophobicity and zeta-potential and chang ...
DOI:
10.1016/j.idairyj.2021.105001

18. Enhanced uranium removal from acidic wastewater by phosphonate-functionalized ordered mesoporous silica: Surface chemistry matters the most

Author:
Giannakoudakis, Dimitrios A.; Anastopoulos, Ioannis; Barczak, Mariusz; Αntoniou, Εvita; Terpiłowski, Konrad; Mohammadi, Elmira; Shams, Mahmoud; Coy, Emerson; Bakandritsos, Aristides; Katsoyiannis, Ioannis A.; Colmenares, Juan Carlos; Pashalidis, Ioannis
Source:
Journal of hazardous materials 2021 v.413 pp. 125279
ISSN:
0304-3894
Subject:
zeta potential,   etc   ; adsorbents; adsorption; carbonates; cations; pH; phosphonates; porous media; remediation; silica; thermodynamics; uranium; wastewater;     Show all 13 Subjects
Abstract:
... The removal of uranium species from aqueous phases using non-hazardous chemicals is still an open challenge, and remediation by adsorption is a prosperous strategy. Among the most crucial concerns regarding the design of an efficient material as adsorbent are, except the cost and the green character, the feasibility to be stable and effective under acidic pH, and to selectively adsorb the desired ...
DOI:
10.1016/j.jhazmat.2021.125279

19. The inhibitory effect of in situ extracellular polymeric substances on trimethoprim adsorption by activated sludge

Author:
Ma, You; Yuan, Pei-Kun; Wu, Yu; Cheng, Xin-Ying; Meng, Han; He, Huan; Wang, Guo-Xiang; Chen, Xue-Ming; Xie, Wen-Ming; Zhang, Li-Min
Source:
Chemosphere 2021 v.274 pp. 129798
ISSN:
0045-6535
Subject:
zeta potential,   etc   ; activated sludge; adsorption; cell membranes; kinetics; molecular weight; pollutants; polymers; polysaccharides; trimethoprim; wastewater treatment;     Show all 11 Subjects
Abstract:
... The extracellular polymeric substances (EPS) of activated sludge are a mixture of high molecular weight polymers secreted by microorganisms, which are mainly composed of proteins, polysaccharides and humic substances. It is widely accepted that EPS have a good adsorption ability for pollutants with different functional groups. However, recent studies showed the EPS had an inhibitory effect on poll ...
DOI:
10.1016/j.chemosphere.2021.129798

20. Unseeded, spontaneous nucleation of spherulitic magnesium calcite

Author:
Prus, Marzena; Li, Chunhui; Kędra-Królik, Karolina; Piasecki, Wojciech; Lament, Karolina; Begović, Tajana; Zarzycki, Piotr
Source:
Journal of colloid and interface science 2021 v.593 pp. 359-369
ISSN:
0021-9797
Subject:
zeta potential,   etc   ; calcite; calcium; calcium carbonate; diagenesis; electrochemistry; magnesium; molecular dynamics; surface area; thermodynamics;     Show all 10 Subjects
Abstract:
... Most of the sedimentary carbonates deposited in the marine environments are composed of calcium carbonate minerals with varying amounts of incorporated Mg²⁺. However, understanding how interactions of impurities with carbonate and their incorporation affect sediments behavior remains a challenge. Here, a new insight is obtained by monitoring solution composition, morphology, and electrokinetic pot ...
DOI:
10.1016/j.jcis.2021.03.002