Article
Biotechnology & Applied Microbiology
Melanie H. Hughes, Patricia I. Leonardi, Diego B. Genovese
Summary: This study investigates the effects of carrageenan concentration, salt concentration, and KCl center dot CaCl2 ratio on the gelation properties of carrageenans from Sarcopeltis skottsbergii and Sarcothalia crispata. The results show that higher concentrations of carrageenan and salt increase gel strength but also increase turbidity. Increasing the KCl fraction also increases gel strength. The optimal compositions predicted by the models are in line with the observed responses. Considering the increasing demand for carrageenan in the food industry, S. skottsbergii and S. crispata could be potential sources of these biopolymers.
ALGAL RESEARCH-BIOMASS BIOFUELS AND BIOPRODUCTS
(2023)
Article
Agriculture, Multidisciplinary
Shuang Li, Songyi Lin, Pengfei Jiang, Zhijie Bao, Xueqing He, Na Sun
Summary: The contribution and mechanism of different hydration characteristics of kappa-/iota-carrageenan on the gelling properties of shrimp myofibrillar protein were studied. It was found that an appropriate amount of carrageenan enhanced the gel strength, water-holding capacity, and viscoelastic properties of the gel, while excessive carrageenan caused fragmentation of the gel network. Different types of carrageenan had different effects on the hardness and tenderness of the gel, which may be attributed to their interaction with myosin.
JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE
(2023)
Article
Chemistry, Multidisciplinary
Ermides Chavez-Baldovino, Carlos A. Malca-Reyes, Roberto Masso, Peter Feng, Adrian Camacho, Janeth Sarmiento, Justin I. Borrero Negron, Yomaira J. Pagan-Torres, Liz M. Diaz-Vazquez
Summary: In this study, carrageenan membranes with different concentrations of titanium dioxide nanoparticles (TiO2 NPs) and Ni/CeO2 were used to prepare a novel fuel cell electrode for the oxidation of ethanol. The physicochemical properties of each membrane were characterized, and the carrageenan nanocomposite with 5 wt % TiO2 NPs showed the highest ionic conductivity (2.08 x 10(-4) S/cm). The CR5% membrane was mixed with Ni/CeO2 to prepare the working electrode, and cyclic voltammetry measurements showed peak current density values of 9.52 and 12.22 mA/cm(2) for the oxidation of ethanol over CR5% + Ni/CeO2 at forward and reverse scan voltages, respectively. The CR5% + Ni/CeO2 membrane was found to be more efficient in the oxidation of ethanol compared with commercially available Nafion membranes containing Ni/CeO2.
Article
Multidisciplinary Sciences
Uma Jingxin Tay, Megan Goh, Jeralyn Ching Wen Hui, Prakash Arumugam
Summary: This paper presents a simple, economical, and miniaturized assay called the Floating Sphere Assay for detecting novel proteins with gelling attributes, accurately estimating the Minimum Gelling Concentrations (MGCs), and accelerating the discovery of gelatin substitutes.
Article
Multidisciplinary Sciences
Uma Jingxin Tay, Megan Goh, Jeralyn Ching Wen Hui, Prakash Arumugam
Summary: The study introduces a simple and economical 'Floating Sphere Assay' method for detecting minimum gelling concentration and high-throughput screening of gelling proteins.
Article
Food Science & Technology
Anna Vincova, Kristyna Santova, Vendula Kurova, Alena Kratochvilova, Veronika Halamkova, Marketa Suchankova, Eva Lorencova, Daniela Sumczynski, Richardos Nikolaos Salek
Summary: The study aimed to evaluate the effects of different algal hydrocolloids (κ-carrageenan, η-carrageenan, furcellaran, and sodium alginate) at three concentrations (0.50%, 0.75%, and 1.00%) on the physicochemical, viscoelastic, textural, and organoleptic properties of model cream cheese. The samples with κ-carrageenan showed the highest viscoelastic moduli and hardness values. Increasing the concentrations of the tested hydrocolloids resulted in higher viscoelastic moduli and hardness values. It is recommended to use 0.50%-0.75% (w/w) κ-carrageenan for softer-consistency cream cheese or 1.00% (w/w) furcellaran and sodium alginate. A higher concentration of κ-carrageenan (>0.75% w/w) is recommended for a more rigid consistency.
Article
Polymer Science
Yoga W. Wardhana, Nuur Aanisah, Iyan Sopyan, Rini Hendriani, Anis Y. Chaerunisaa
Summary: The physicochemical properties of ester forms derived from different fatty-acid saturations were characterized and compared with native kappa-carrageenan. The results showed changes in viscosity, hardness, and syneresis, but the ester forms still had a similar swelling ability as kappa-carrageenan.
Article
Chemistry, Physical
Nataliya Kochkina, Maria Nikitina, Mikhail Agafonov, Ekaterina Delyagina, Irina Terekhova
Summary: In this study, a topical hydrogel based on iota-carrageenan, methotrexate, and cyclodextrin was developed to reduce the side effects of systemic drug administration. It was found that complexation with β-cyclodextrin affects the release rate and mechanism of methotrexate, as well as the permeability of the drug through the skin. The prepared hydrogel can be proposed as a topical drug delivery system for the treatment of skin cancer and autoimmune diseases.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Food Science & Technology
Myat NOE. Khin, Shabbir Ahammed, Fang Zhong
Summary: This study explored the potential use of DTAF for labeling polysaccharides with different functional groups, especially anionic functional groups, without affecting their physio-chemical properties. The results showed that DTAF labeling did not impact the gelation properties and stability of polysaccharides, while maintaining their mechanical strength and visibility.
Article
Polymer Science
Yuqing Lei, Hui Ouyang, Wu Peng, Xiongwei Yu, Long Jin, Shugang Li
Summary: In this study, a certain concentration of Na+ was found to significantly improve the properties and texture of the walnut protein isolate-kappa-carrageenan composite gel, providing technical support for the high-value utilization and quality control of walnut protein.
Review
Chemistry, Physical
Hileia K. S. Souza, Wala Kraiem, Amine Ben Yahia, Adel Aschi, Loic Hilliou
Summary: Hybrid carrageenans, also known as kappa-2 (K2) or weak kappa, are sulfated polysaccharides extracted from specific species of red seaweeds. They have thermo-reversible gelling properties and are gaining interest in industry due to their intermediate texturizing properties. However, further research is needed to fully understand their chemical structure and how it affects their gel formation and rheological properties.
Article
Construction & Building Technology
Asma Boukhatem, Kamal Bouarab, Ammar Yahia
Summary: The effect of kappa-iota carrageenan on the rheological behavior, hydration kinetics, and strength development of cement-based materials was investigated. The results showed that the addition of kappa-iota carrageenan increased the flowability and structural stability of cement suspensions. However, when combined with high-range water reducer (HRWR), the effect of kappa-iota carrageenan was reduced. Furthermore, the addition of kappa-iota carrageenan delayed the hardening time of cement suspensions, but had no significant impact on early-age compressive strength development.
ACI MATERIALS JOURNAL
(2022)
Article
Materials Science, Multidisciplinary
Panchami Patel, Kratika Mujmer, Vinod Kumar Aswal, Sharad Gupta, Prachi Thareja
Summary: In this study, the printing limitation of κ-carrageenan gel ink was overcome by optimizing the ink formulation. It was found that the addition of 25 mM KCl or CaCl2 significantly improved the printability of the gel ink, resulting in thin and continuous filaments. Furthermore, the gel ink showed excellent biocompatibility.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Biochemistry & Molecular Biology
O. Peleg-Evron, M. Davidovich-Pinhas, H. Bianco-Peled
Summary: The aim of this research was to create a polymer-nanogel hydrogel that is both mechanically stable and easily dissolvable by utilizing hydrogen bonds between two polysaccharides. The resulting hydrogel exhibited self healing and shear-thinning properties due to weak physical interactions. Changes in temperature, nanogel concentration, or the addition of potassium ions affected the swelling and dissolution rates. Furthermore, the addition of KCl increased the compression and tensile moduli and strength of the hydrogel. This new formulation has potential as a sacrificial material for various applications due to its mechanical stability and rapid dissolution in physiological conditions.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Polymer Science
Lester C. Geonzon, Kei Hashimoto, Tatsuro Oda, Shingo Matsukawa, Koichi Mayumi
Summary: This study investigated the viscoelastic properties and temperature-dependent hierarchical structure of carrageenan gels using various methods, and found that different gels exhibited different responses and structural characteristics.
Review
Energy & Fuels
Bin Pan, Teng Ni, Weiyao Zhu, Yongfei Yang, Yang Ju, Lijie Zhang, Shengnan Chen, Jianwei Gu, Yajun Li, Stefan Iglauer
Summary: This article provides a critical review of the key parameter of wettability in the methane-liquid-rock system, discussing its influence from experimental and theoretical perspectives, including pressure and temperature conditions, fluid properties, and rock surface characteristics. The article identifies current research gaps, provides future outlook, and draws several conclusions. The mini review contributes to the fundamental understanding of wettability in the methane-liquid-rock system under in situ reservoir conditions and offers useful guidance for shale gas/coalbed methane recovery and natural gas geo-storage.
Correction
Energy & Fuels
Mirhasan Hosseini, Jalal Fahimpour, Muhammad Ali, Alireza Keshavarz, Stefan Iglauer
Article
Energy & Fuels
Mirhasan Hosseini, Jalal Fahimpour, Muhammad Ali, Alireza Keshavarz, Stefan Iglauer
Summary: In this study, the H2 wettabilities of different shales and one evaporite under various conditions were measured, and their effects on the capillary sealing efficiency were analyzed. The results showed that the sealing efficiency of caprocks decreased with varying parameters, except for oil shales which increased with temperature. Additionally, small pore sizes and evaporites were found to have the most efficient sealing conditions.
Article
Geosciences, Multidisciplinary
Stefan Iglauer, Hamed Akhondzadeh, Hussein Abid, Adriana Paluszny, Alireza Keshavarz, Muhammad Ali, Ausama Giwelli, Lionel Esteban, Joel Sarout, Maxim Lebedev
Summary: The study shows that geo-storage of H-2 in coal seams is feasible, which can contribute to the large-scale implementation of a hydrogen economy.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Geosciences, Multidisciplinary
Rossen Sedev, Hamed Akhondzadeh, Mujahid Ali, Alireza Keshavarz, Stefan Iglauer
Summary: Rock wettability is a key factor in the storage of hydrogen, affecting its capacity and safety. The study found that under realistic storage conditions, the surface of bituminous coal exhibited weak water-wettability. The pressure of hydrogen increased the contact angles of brine on the coal surface at 25 degrees C but had no impact at higher temperatures. A thermodynamic model was proposed to describe the observed behavior, supporting the development of large-scale geostorage technologies for hydrogen.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Geosciences, Multidisciplinary
Miftah Hidayat, Mohammad Sarmadivaleh, Jos Derksen, David Vega-Maza, Stefan Iglauer, Jan Vinogradov
Summary: The zeta potential of clayey sandstone saturated with NaCl solutions at supercritical CO2 conditions differs significantly from measurements conducted under ambient conditions or with clean sandstones, mainly due to the presence and exposure of clays and feldspars.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Energy & Fuels
Mehran Mirzavandi, Jagar A. Ali, Abbas Khaksar Manshad, Barham Majeed, Barham Sabir Mahmood, Amir H. Mohammadi, Stefan Iglauer, Alireza Keshavarz
Summary: Nanomaterials, specifically silica-graphene quantum dots (Si-GQDs), have been synthesized and dispersed in water to form nanofluids. These nanofluids exhibit significant reduction in interfacial tension and wettability alteration, leading to enhanced oil recovery from carbonate reservoirs. The experimental results show that the nanofluids formulated with 1000 ppm Si-GQDs in distilled water enable an additional 14.4% oil recovery due to the reduction in interfacial tension and contact angle.
Article
Energy & Fuels
Ali Aref Ali Alzanam, Ali S. Muhsan, Hesham Abdulelah, Diab Mohamed, Stefan Iglauer
Summary: In this study, a novel approach of resin-based nanocomposite coated proppants was developed to control scale deposition in tight formations. The coated proppants showed high adsorption capacity, slow desorption rate, and improved stress resistance, making them a promising multifunctional proppant in the oil and gas industry.
Article
Energy & Fuels
Auby Baban, Mujahid Ali, Muhammad Arif, Alireza Keshavarz, Robert Amin, Stefan Iglauer
Summary: This study used NMR technology to analyze the wettability and CO2 trapping behavior of rocks, and found that organic acids have a significant impact on the wettability and CO2 trapping behavior of rocks. The results showed that organic acids reduce the amount of CO2 trapping, and CO2 mainly traps in meso- and micropores. This study is of great significance for the implementation of large-scale underground gas storage and enhanced oil recovery projects in carbonate reservoirs.
Article
Energy & Fuels
Fatemah Alhamad, Rossen Sedev, Mujahid Ali, Muhammad Ali, Hussein Hoteit, Stefan Iglauer, Alireza Keshavarz
Summary: Hydrogen is expected to be a significant clean energy carrier, but the development of a hydrogen economy requires large-scale hydrogen storage. Different underground formations can be used for hydrogen storage, and wettability is an important factor in determining the containment security and storage capacity. This study investigates the use of a toxic dye, methyl orange, to alter the wettability of reservoirs for hydrogen geo-storage.
Article
Energy & Fuels
Hussein Rasool Abid, Aamir Hanif, Alireza Keshavarz, Jin Shang, Stefan Iglauer
Summary: This study compares the performance of Cu-metal-organic framework (MOF) HKUST-1 synthesized using conventional hydrothermal synthesis with its modified analogues HKUST-N and HKUST-Ca for CO2, CH4, and H2 adsorption. The results show that different synthesis strategies significantly impact the morphology and adsorption performance of the materials.
Article
Energy & Fuels
Bin Pan, Christopher R. R. Clarkson, Amin Ghanizadeh, Chengyao Song, Adnan Younis, Weiyao Zhu, Stefan Iglauer
Summary: This study aims to develop a rapid and simple approach to determine the permeability of liquid (brine or oil) in tight siltstones/shales. The proposed method combines one-dimensional vacuum imbibition experiments and a modified Lucas-Washburn model. The results show that the liquid permeability (98-608 nD) of the analyzed samples from the Montney and Yanchang formations can be determined within 44-116 hours, and the obtained brine permeability is 28.3-28.5% lower than the slip-corrected nitrogen permeability derived from pulse-decay tests. This study provides a promising technique for fast characterization of the ultratight formation permeability of around 100 nD.
Article
Energy & Fuels
Mirhasan Hosseini, Muhammad Ali, Jalal Fahimpour, Alireza Keshavarz, Stefan Iglauer
Summary: Underground hydrogen storage (UHS) and CO2 geological storage (CGS) are essential for meeting energy demand and reducing greenhouse gases (GHGs). The calcite-fluid interfacial tension (Ycalcite-fluid) is crucial for gas storage in carbonate formations, but there is a lack of Ycalcite-fluid data in the literature. We theoretically calculated Ycalcite-fluid for calcite/H2/water and calcite/CO2/water systems, considering geological parameters like temperature, pressure, organic acid concentration, and salinity. The results showed that Ycalcite-gas decreased with pressure, salinity, and organic acid concentration but increased with temperature. Ycalcite-water slightly increased with organic acid concentration and salinity. Furthermore, Ycalcite-fluid values were higher for the H2/brine system compared to the CO2/brine system. This study provides a better understanding of wetting characteristics and enables further research on H2/CO2 storage in carbonate formations.
Correction
Energy & Fuels
Fatemah Alhammad, Rossen Sedev, Mujahid Ali, Muhammad Ali, Hussein Hoteit, Stefan Iglauer, Alireza Keshavarz
Article
Chemistry, Multidisciplinary
Ali Ahmadi, Abbas Khaksar Manshad, Jagar A. Ali, Stefan Iglauer, S. Mohammad Sajadi, Alireza Keshavarz, Amir H. Mohammadi
Summary: This study confirms the effectiveness of KCl/SiO2/Xanthan NCs in EOR applications, which can significantly alter the wettability of reservoir rocks and increase oil production.
