Article
Chemistry, Physical
Gul Muhammad, Jingjing Wang, Wenlong Xiong, Yongkun Lv, Shen Zhang, Anqi Zhao, Parisa Jahanbakhsh-Bonab, Alexei Solovchenko, Jingliang Xu, Md. Asraful Alam
Summary: The present study aimed to develop a green and sustainable extraction procedure to obtain lutein from microalgae. A novel pretreatment process was established using a series of acidic and polyol based deep eutectic solvents (DESs). The lutein yield was optimized using response surface methodology (RSM) and one-factor-at-a-time approach.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Agricultural Engineering
Yong Deng, Xiaoling Yang, Tianyi Yan, Weidong Xu, Jiaheng Li, Ruihao Niu, Runan Zhao, Han Wang, Hao Wang, Tingting Chen, Mingming Guo, Wenjun Wang, Donghong Liu
Summary: The use of ultrasound-assisted extraction (UAE) is effective in extracting Chlorella pyrenoidosa protein (CPP) and can contribute to its nutrient enrichment.
BIORESOURCE TECHNOLOGY
(2023)
Article
Engineering, Chemical
Kuan Shiong Khoo, Yen Mun Chong, Wen Sing Chang, Jie Min Yap, Su Chern Foo, Ianatul Khoiroh, Phei Li Lau, Kit Wayne Chew, Chien Wei Ooi, Pau Loke Show
Summary: CO2-based alkyl carbamate ILs were proposed as an alternative solvent for lutein extraction from Chlorella sorokiniana. Complete separation of lutein from ILs was achieved by distillation under mild conditions, and the recyclability of DPCARB was found to be satisfactory after multiple cycles of extraction. The potential of CO2-based alkyl carbamate ILs in lutein extraction is promising due to their recyclability, which helps reduce environmental impact and operating costs.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Multidisciplinary Sciences
Dingyi Li, Hong Dong, Xupeng Cao, Wangyin Wang, Can Li
Summary: This study reports the self-assembly of metal-organic frameworks (MOFs) on the surface of the green alga Chlorella pyrenoidosa, which greatly enhances photosynthetic carbon fixation. The chemical CO2 concentrating approach improves the apparent photo conversion efficiency to about 1.9 folds, reaching up to 9.8% in ambient air. The efficient carbon fixation lies in the conversion of captured CO2 to transportable HCO3- species.
NATURE COMMUNICATIONS
(2023)
Article
Biochemistry & Molecular Biology
Jialu Ni, Kuiyou Wang, Deyang Yu, Mingqian Tan
Summary: In this study, stable Pickering emulsions based on Chlorella pyrenoidosa protein-chitosan complex were prepared, and lutein was encapsulated into corn oil droplets to increase its stability and bioavailability in gastrointestinal digestion. The results showed that the emulsion droplet size decreased and the stability and viscosity increased significantly with the increase of chitosan concentration. The retention rate of lutein in Pickering emulsions stabilized by CP-CS complex was significantly higher than that in Pickering emulsions stabilized by CP only and corn oil, and the bioavailability of lutein encapsulated in Pickering emulsions stabilized by CP-CS complex reached 44.83% in simulated gastrointestinal digestion.
Article
Food Science & Technology
Alexandros Katsimichas, Ioulia Karveli, George Dimopoulos, Maria Giannakourou, Petros Taoukis
Summary: Protein extraction kinetics from microalga Chlorella pyrenoidosa using High Pressure Homogenization pretreatment was investigated. The study found that a four-pass treatment at 800 bar led to maximization of carbohydrate and protein recovery, with the highest protein recovery obtained after extraction at 40 degrees C for 24 hours. The protein characteristic extraction time significantly depended on pretreatment conditions and extraction temperature.
INNOVATIVE FOOD SCIENCE & EMERGING TECHNOLOGIES
(2023)
Article
Environmental Sciences
Jingmiao Zhang, Ao Xia, Huize Chen, Abdul-Sattar Nizami, Yun Huang, Xianqing Zhu, Xun Zhu, Qiang Liao
Summary: A green hydrothermal process was used to produce biobased nanomaterials carbon dots (CDs) using microalgae Chlorella pyrenoidosa (CP) and its main model compounds. The reaction pathway for the hydrothermal process to produce microalgae-based CDs was proposed. Interactions among carbohydrates and proteins were found to be vital intermediate reactions in the generation of CDs. The CDs emitted blue fluorescence and displayed high sensitivity in detecting Fe3+ in wastewater.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Food Science & Technology
Qiming Wu, Yuchen Ma, Lanxin Zhang, Jing Han, Yanan Lei, Yi Le, Caoxing Huang, Juntao Kan, Caili Fu
Summary: This review provides a comprehensive summary of the extraction methods, functions, and practical applications of Chlorella pyrenoidosa protein (CPP) and peptide. CPP has demonstrated antioxidant, anti-inflammatory, and bacteriostatic properties, and shows potential in immune regulation, cardiovascular disease prevention, and wastewater treatment. Additionally, CPP is being explored for its role in 3D printing applications.
CURRENT RESEARCH IN FOOD SCIENCE
(2023)
Article
Biotechnology & Applied Microbiology
Yali Zhu, Xin Li, Yujiao Wang, Lujing Ren, Quanyu Zhao
Summary: Lutein, a high-value pigment from microalgae, can be extracted more efficiently using ionic liquid-based methods, with the selection of suitable ionic liquid depending on the specific species of microalgae. Extraction from fresh microalgae showed higher efficiency and reached up to 97.73% under specific experimental conditions.
ALGAL RESEARCH-BIOMASS BIOFUELS AND BIOPRODUCTS
(2021)
Article
Chemistry, Multidisciplinary
Allan Morcelli, Eduardo Cassel, Rubem Vargas, Rosane Rech, Nilson Marcilio
Summary: This study investigated the effect of CO2+ethanol mixtures on carotenoid extraction, using both theoretical and experimental approaches. Factors such as extraction temperature, pressure, and solvent composition played crucial roles in extraction efficiency, with ethanol proving essential for efficient extraction. The combination of theoretical calculations and experiments provided important insights for the selection of supercritical solvents for carotenoid extraction from microalgae.
JOURNAL OF CO2 UTILIZATION
(2021)
Article
Biotechnology & Applied Microbiology
Chetan Paliwa, Mohammed Rehmanji, Kashif Mohd Shaikha, Saeed Uz Zafar, Pannaga Pavan Jutur
Summary: Billions of tonnes of waste are generated in the food industry annually. The use of ionic liquids to extract natural antioxidants and therapeutics from microalgae can improve process efficiency and reduce dependency on petroleum-based chemicals. A study found that Tetrabutyl phosphonium hydroxide is the best ionic liquid for extracting carotenoids, and optimizing extraction conditions can further increase lutein extraction.
ALGAL RESEARCH-BIOMASS BIOFUELS AND BIOPRODUCTS
(2022)
Article
Food Science & Technology
Kashif Ghafoor, Md. Zaidul Islam Sarker, Fahad Y. Al-Juhaimi, Elfadil E. Babiker, Mohammed S. Alkaltham, Abdullah K. Almubarak
Summary: Date (Phoenix dactylifera) seed can be a potential source of natural antioxidants. Innovative green and low temperature antioxidant recovery techniques, such as supercritical fluid (SFE) and subcritical (SubCO(2)) extractions using CO2 as a solvent, can improve the yields and quality of antioxidant extracts. This study compared SFE, SubCO(2), and Soxhlet techniques for enriching antioxidants in extracts from different date seed varieties. The results showed that SFE and SubCO(2) methods extracted significantly higher levels of phenolics, flavonoids, anthocyanins, and carotenoids compared to Soxhlet. In vitro evaluation also demonstrated that SFE and SubCO(2) extracts had promising antioxidant properties, making them potential candidates for functional and nutraceutical applications.
Article
Chemistry, Multidisciplinary
Mohammadreza Askari, Ahmad Jafari, Feridun Esmaeilzadeh, Mohammad Khorram, Amir H. Mohammadi
Summary: In this study, the kinetics of supercritical fluid extraction of lipid from Nannochloropsis oculata using supercritical CO2 were investigated. The effects of temperature, pressure, and the co-solvent n-hexane were studied. The results show that temperature and pressure have opposite effects on the kinetic constant of lipid extraction, while the addition of n-hexane improves both the yield and the rate of extraction.
Review
Energy & Fuels
Haiquan An, Zhen Liu, Xinhui Fang, Ziyang Feng, Xuelei Duan
Summary: This study investigated the CO2 gasification kinetics of direct coal liquefaction residue (ER), showing higher reactivity of ER char compared to coal char and an increase in reactivity with higher ER content in blends. The partial pressure of CO2 promoted the reactivity of all samples, and ER char exhibited larger BET surface area and pore volume compared to coal char. Activation energy and reaction order parameters for ER char, coal char, and their blend were also determined.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Chemistry, Multidisciplinary
Avinash Kumar Jha, Nandan Sit
Summary: Terminalia chebula fruit pulp was subjected to different pre-treatments, including microwave, ultrasound, and cellulase, and their combinations, followed by supercritical CO2 extraction of bioactive compounds. Ultrasound at 50% amplitude, microwave at 360 Watts, and enzyme with 400 Units resulted in the highest yield of bioactive compounds. The combined treatment of microwave-assisted ultrasound extraction showed the maximum extraction of bioactive compounds. The final extract had high levels of phenolic compounds, flavonoids, and antioxidant capacity.
SUSTAINABLE CHEMISTRY AND PHARMACY
(2023)