Article
Agricultural Engineering
Litao Zhang, Chunhui Zhang, Ran Xu, Wenjie Yu, Jianguo Liu
Summary: By inhibiting the alternative oxidase (AOX) respiratory pathway, the production processes of fatty acids and astaxanthin in Haematococcus pluvialis were enhanced, leading to increased efficiency in synthesizing fatty acids and astaxanthin. The study demonstrated a significant increase in the contents of fatty acids and astaxanthin under conditions where the AOX pathway was inhibited.
BIORESOURCE TECHNOLOGY
(2022)
Article
Plant Sciences
Danielle Yvonne Young, Na Pang, Yair Shachar-Hill
Summary: Isotopic labeling research reveals that a major chloroplast membrane lipid in Chlamydomonas cells contributes glyceryl backbones and fatty acids for oil accumulation through the removal of its headgroup. This finding is significant for the potential utilization of microalgae lipids as feedstocks for biofuels, nutraceuticals, and other high-value compounds.
Article
Ecology
Sebastien Le Guellec, Elodie Leroy, Damien Courtine, Anne Godfroy, Erwan G. Roussel
Summary: This study focuses on a group of microorganisms, including 12 strains of Thermococcales, which can grow without sulfur while depending on H-2 and producing formate. The ability to tolerate H-2 is associated with specific gene clusters that code for enzymes and transport proteins related to formate production. Through thermodynamic equilibrium and experimental data, it has been shown that H-2-dependent CO2 reduction to formate can occur at a wide range of temperatures in different hydrothermal systems.
Article
Agriculture, Multidisciplinary
Jiao Wang, Lingyu Ouyang, Li Wei
Summary: The study reveals that the protein expression and lactylation of Nannochloropsis oceanica undergo changes under nitrogen stress. Using the 4D label-free proteome method, it was found that there are 868 lactylation sites in the proteins, which are linked to biological activities such as lipid metabolism and photosynthesis. This study provides a foundation for future epigenetic enhancement of microalgal cells by providing the first dataset of lactylome in Nannochloropsis.
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
(2023)
Article
Plant Sciences
Yevhen Maltsev, Irina Maltseva, Svetlana Maltseva, John Patrick Kociolek, Maxim Kulikovskiy
Summary: A new species of freshwater plankton, Nephrochlamys yushanlensis sp. nov., was described and found to belong to a new lineage within the genus Nephrochlamys based on morphology, gene sequences, and fatty acid profiles. Experiments demonstrated significant increases in biomass and lipid content under phosphate and nitrate deprivation conditions, suggesting potential for biodiesel production.
JOURNAL OF PHYCOLOGY
(2021)
Article
Plant Sciences
Rui Wang, Xiaoling Miao
Summary: This study uncovers the effect of nitrogen deprivation on fatty acid desaturation and its regulatory mechanism. Early nitrogen deprivation reduces fatty acid desaturation without increasing lipid content. Lipidomic analysis reveals the transfer of unsaturated fatty acids from phospholipids and glycolipids to triacylglycerols. Functional characterization identifies certain transcription factors playing important roles in promoting total fatty acid accumulation and reducing fatty acid desaturation.
FRONTIERS IN PLANT SCIENCE
(2022)
Article
Biochemistry & Molecular Biology
Xianjin Qin, Wenqian Wang, Weihua Chu
Summary: The study found that rutin reduces fat storage by regulating the expression of genes related to lipid metabolism, thereby affecting the biosynthesis of unsaturated fatty acids.
Article
Chemistry, Applied
Keqian Hong, Quansheng Yao, John B. Golding, Penta Pristijiono, Xiumei Zhang, Xiaowan Hou, Debao Yuan, Yongxin Li, Li Chen, Kanghua Song, Jiao Chen
Summary: This study aimed to uncover the effect of membrane lipid metabolism on internal browning tolerance in winter pineapple under low temperature storage conditions. The results showed that low temperature storage (10℃) led to reduced internal browning in fruit, which was associated with higher levels of phosphatidylcholine, phosphatidylglycerol, phosphatidylinositol, phosphatidylserine, and phosphatidylethanolamine, and lower levels of phosphatidic acid. Additionally, low temperature storage down-regulated the expression levels of phospholipase As and resulted in a higher ratio of unsaturated fatty acid to saturated fatty acid and an index of unsaturated fatty acid level in the fruit.
Article
Biochemistry & Molecular Biology
Fakai Bai, Xuexi Wang, Xingjian Niu, Guiping Shen, Jidan Ye
Summary: The study conducted a lipidomic analysis to investigate the changes in liver lipid molecular profiles of juvenile orange-spotted groupers in response to different dietary lipid and taurine levels. The results showed that dietary taurine can reduce lipid accumulation by regulating phospholipids and triglycerides, and enhance the anti-inflammatory capacity of groupers. This study provides new insights into the role of taurine in farmed fish.
FRONTIERS IN MOLECULAR BIOSCIENCES
(2021)
Article
Plant Sciences
Chu Zhong, Shao-Fen Jian, Dong-Liang Chen, Xue-Jing Huang, Jian-Hua Miao
Summary: The form of nitrogen affects the secondary metabolites of medicinal plants, with organic nitrogen sources enhancing andrographolide biosynthesis. Plants grown with organic nitrogen sources showed higher photosynthetic rates and increased starch accumulation, while ammonium decreased leaf SPAD value but increased photosynthetic rate and soluble sugar content.
PLANT PHYSIOLOGY AND BIOCHEMISTRY
(2021)
Article
Biotechnology & Applied Microbiology
G. E. Lakatos, K. Ranglova, J. Camara Manoel, T. Grivalsky, J. Masojidek
Summary: Chlorophyll fluorescence and oxygen evolution are rapid and non-invasive monitoring techniques that can provide information about photosynthesis performance in microalgae cultures. By using these techniques in a nitrogen-limited culture of Synechocystis sp. PCC 6803, the study examined the correlation between changes in photosynthetic activities, growth, and glycogen accumulation to determine the optimal harvesting time for biomass rich in glycogen. The results showed that monitoring photosynthetic activities can effectively indicate the physiological changes leading to high glycogen accumulation in the culture.
ALGAL RESEARCH-BIOMASS BIOFUELS AND BIOPRODUCTS
(2021)
Article
Biotechnology & Applied Microbiology
Liang Ji, Shaohua Li, Cheng Chen, Haojie Jin, Haizhen Wu, Jianhua Fan
Summary: Porphyridium purpureum is a mesophilic, unicellular red alga rich in phycoerythrin, sulfate polysaccharides, and polyunsaturated fatty acids. Nitrogen deficiency inhibits its growth, resulting in cell yellowing and thickening of the extracellular viscous sheath. This study shows that under nitrogen stress, P. purpureum increases the content of total lipids and exopolysaccharides.
BIORESOURCES AND BIOPROCESSING
(2021)
Article
Energy & Fuels
Li-Gong Zou, Dan-Lin Zheng, Yi-Tong Yao, Fu-Fang Wen, Da-Wei Li, Yu-Feng Yang, Wei-Dong Yang, Srinivasan Balamurugan, Hang Fai Kwok, Hong-Ye Li
Summary: In this study, it was found that tannic acid, a cheap and natural polyphenol, could regulate the metabolic and physiological properties of the oleaginous microalga Phaeodactylum tricornutum to increase the production of biocompounds. Tannic acid enhanced algal biomass and lipids by regulating key metabolic pathways without affecting photosynthesis. It also facilitated the overproduction of polyunsaturated fatty acids (PUFAs), such as EPA and DHA. Transcriptomic analysis revealed that tannic acid upregulated the expression of genes involved in lipogenesis. These findings provide insights into the potential applications of polyphenols as chemical modulators.
Article
Environmental Sciences
Xiaowen Wang, Ajay Jain, Xu Huang, Xiaoxia Lan, Li Xu, Gengmao Zhao, Xin Cong, Zhantian Zhang, Xiaorong Fan, Feng Hu
Summary: This study investigated the impact of overexpressing OsNRT2.3b on the uptake and translocation of phenanthrene in transgenic rice. The results showed that overexpression of OsNRT2.3b significantly mitigated the toxicity of phenanthrene by reducing its acquisition in roots and translocation to the shoots.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Biotechnology & Applied Microbiology
Dongzhe Sun, Zhao Zhang
Summary: This study revealed that NADPH oxidase-derived ROS is the key regulator in astaxanthin and fatty acid accumulation in the green alga Zofingiensis under nitrogen starvation conditions.
JOURNAL OF APPLIED PHYCOLOGY
(2021)
Article
Agricultural Engineering
Yinping Xiang, Meiying Jia, Rui Xu, Jialu Xu, Lele He, Haihao Peng, Weimin Sun, Dongbo Wang, Weiping Xiong, Zhaohui Yang
Summary: This study investigated the impact of the non-antibiotic pharmaceutical carbamazepine on antibiotic resistance genes (ARGs) during anaerobic digestion. The results showed that carbamazepine induced the enrichment of ARGs and increased the abundance of bacteria carrying these genes. It also facilitated microbial aggregation and intercellular communication, leading to an increased frequency of ARGs transmission. Moreover, carbamazepine promoted the acquisition of ARGs by pathogens and elevated their overall abundance.
BIORESOURCE TECHNOLOGY
(2024)
Review
Agricultural Engineering
Weixin Zhao, Tianyi Hu, Hao Ma, Dan Li, Qingliang Zhao, Junqiu Jiang, Liangliang Wei
Summary: This review summarizes the effects and potential mechanisms of biochar on microbial behavior in AD systems. The addition of biochar has been found to promote microbial colonization, alleviate stress, provide nutrients, and enhance enzyme activity. Future research directions include targeted design of biochar, in-depth study of microbial mechanisms, and improved models.
BIORESOURCE TECHNOLOGY
(2024)
Review
Agricultural Engineering
Christina Karmann, Anna Magrova, Pavel Jenicek, Jan Bartacek, Vojtech Kouba
Summary: This review assesses nitrogen removal technologies in reject water treatment, highlighting the differences in environmental impacts and economic benefits. Partial nitritation-anammox shows potential for economic benefits and positive environmental outcomes when operated and controlled properly.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Wei-Hao Huang, Ying-Ju Chang, Duu-Jong Lee
Summary: This study modified pinecone biochar with layered double hydroxide (LDH) to enhance its adsorption capacity for heavy metal and phosphate ions. The LDH-biochar showed significantly improved adsorption capacities for Pb2+ and phosphate, and a slight increase for Cu2+ and Co2+. The LDH layer enhanced the adsorption through various mechanisms.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Chao Song, Fanfan Cai, Shuang Yang, Ligong Wang, Guangqing Liu, Chang Chen
Summary: This paper developed a machine learning model to predict the biochemical methane potential during anaerobic digestion. Model analysis identified lignin content, organic loading, and nitrogen content as key attributes for methane production prediction. For feedstocks with high cellulose content, early methane production is lower but can be improved by prolonging digestion time. Moreover, lignin content exceeding a certain value significantly inhibits methane production.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Sang Min Lee, Ju Young Lee, Ji-Sook Hahn, Seung-Ho Baek
Summary: This study successfully developed an efficient platform strain using Yarrowia lipolytica for the bioconversion of renewable resources into adipic acid, achieving a remarkable increase in production level.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Sefkan Kendir, Matthias Franzreb
Summary: This study presents a novel approach using magnetic separation to efficiently harvest freshwater microalgae, Chlorella vulgaris. By combining pH-induced calcium phosphate precipitation with cheap natural magnetite microparticles, harvesting efficiencies up to 98% were achieved in the model medium.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Ishaq Kariim, Ji-Yeon Park, Wajahat Waheed Kazmi, Hulda Swai, In-Gu Lee, Thomas Kivevele
Summary: The impact of reaction temperature, residence time, and ethanol: acetone on the energy compositions and yield enhancement of biocrudes was investigated. The results showed that under appropriate conditions, biocrudes with high energy and low oxygen content can be obtained, indicating a high potential for utilization.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Xiyue Zhang, Xiyao Li, Liang Zhang, Yongzhen Peng
Summary: Intermittent aeration is an innovative approach to enhance nitrogen removal in low carbon-to-nitrogen ratio municipal sewage, providing an efficient strategy for the continuous plug-flow AOA process.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Xu Yang, Mahmoud Mazarji, Mengtong Li, Aohua Li, Ronghua Li, Zengqiang Zhang, Junting Pan
Summary: This study investigated the impact of magnetite on the nitrogen cycle of pig manure biostabilisation. The addition of magnetite increased N2O emissions and decreased NH3 emissions during composting. It also increased the total nitrogen content but should be considered for its significant increase in N2O emissions in engineering practice.
BIORESOURCE TECHNOLOGY
(2024)
Review
Agricultural Engineering
Ty Shitanaka, Haylee Fujioka, Muzammil Khan, Manpreet Kaur, Zhi-Yan Du, Samir Kumar Khanal
Summary: The market value of microalgae has exponentially increased in the past two decades, thanks to their applications in various industries. However, the supply of high-value microalgal bioproducts is limited due to several factors, and strategies are being explored to overcome these limitations and improve microalgae production, thus increasing the availability of algal-derived bioproducts in the market.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Martin Kerner, Thorsten Wolff, Torsten Brinkmann
Summary: The efficiency of using enriched CO2 from flue gas for large-scale production of green microalgae has been studied. The results show that the use of membrane devices and static mixers can effectively improve the CO2 recovery rate and maintain the suitable pH and temperature during cultivation, achieving a more economical and sustainable microalgae production.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Rui Ma, Ji Li, Rd Tyagi, Xiaolei Zhang
Summary: This review summarizes the microorganisms capable of using CO2 and CH4 to produce PHAs, illustrating the production process, factors influencing it, and discussing optimization techniques. It identifies the challenges and future prospects for developing economically viable PHAs production using GHGs as a carbon source.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Bing Wang, Peng Zhang, Xu Guo, Xu Bao, Junjie Tian, Guomin Li, Jian Zhang
Summary: The addition of zeolite in the co-composting of chicken manure and straw significantly reduced the emissions of ammonia and N2O, and increased the nitrate content. Zeolite also promoted the abundance of nitrification genes and inhibited the expression of denitrification genes.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Rohit Dey, Franziska Ortiz Tena, Song Wang, Josef Martin Messmann, Christian Steinweg, Claudia Thomsen, Clemens Posten, Stefan Leu, Matthias S. Ullrich, Laurenz Thomsen
Summary: This study investigated the operation of a 1000L microalgae-based membrane photobioreactor system for continuous secondary wastewater treatment. The research focused on a green microalgae strain called Desmodesmus sp. The study aimed to understand key trends and optimization strategies by conducting experiments in both summer and winter seasons. The findings showed that maintaining low cell concentrations during periods of light inhibition was beneficial for nutrient uptake rates. Effective strategies for enhancing algae-based wastewater treatment included cell mass recycling and adjusting dilution rates based on light availability.
BIORESOURCE TECHNOLOGY
(2024)