Article
Biochemistry & Molecular Biology
Dilara Yalmanci, Enes Dertli, Zeynep Hazal Tekin-Cakmak, Salih Karasu
Summary: This study aimed to investigate the potential usage of exopolysaccharide (EPS) produced by Leuconostoc lactis GW-6 species as an emulsifier in a low-fat mayonnaise by the formation of a complex with whey protein isolate (WPI) to improve rheological properties, emulsion, and oxidative stability. The results showed that the EPS and WPI interaction can significantly affect the rheological properties, emulsion, and oxidative stability of mayonnaise samples.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Biotechnology & Applied Microbiology
Ola M. Gomaa, Hussein Abd El Kareem, Nabila Selim
Summary: The nitrate reducing bacteria Bacillus subtillis sp. DN can be used for simultaneous removal of nitrate and azo dye from wastewater. It possesses membrane-bound nitrate reductase capable of direct electron transfer and exhibits different biofilm formation under different nitric concentrations.
BIOTECHNOLOGY LETTERS
(2021)
Article
Biotechnology & Applied Microbiology
K. Rajitha, Y. Nancharaiah, V. P. Venugopalan
Summary: The study investigated the impact of temperature rise on biofilm formation and EPS production in Bacillus species in an operating power plant's cooling water system. Results showed that biofilm formation significantly increased at 37-45°C, with corresponding enhanced EPS production. At 45°C, biofilm growth and EPS production increased by 47% and 62% respectively compared to 30°C.
INTERNATIONAL BIODETERIORATION & BIODEGRADATION
(2021)
Article
Agricultural Engineering
Yi Sun, Amjad Ali, Zhijie Zheng, Junfeng Su, Shuai Zhang, Yitian Min, Yu Liu
Summary: This study successfully integrated spores and magnetite to form magnetic mycelium pellets as bio-carriers immobilized with denitrifying bacteria in a bioreactor. The results showed that under specific carbon-to-nitrogen ratio and hydraulic retention time conditions, the bioreactor had high nitrate removal efficiency and microbial activity.
BIORESOURCE TECHNOLOGY
(2022)
Article
Engineering, Environmental
Rui Lu, Qianqian Zhang, Yuhua Chen, Heng An, Liping Zhang, Zhenbin Wu, Enrong Xiao
Summary: The hybrid system of microbial fuel cell and constructed wetlands based on iron sulphides substrates has been shown to effectively treat low C/N wastewater through nitrate reduction and electrogenesis. Pyrrhotite-based and pyrite-based systems demonstrated increased electron involvement in nitrate reduction compared to activated carbon-based system. Thauera was identified as a key functional genus, and sulfate and C/N were found to be important environmental factors. The structural equation model analysis revealed a larger allocation of electrons to nitrate reduction in pyrrhotite and pyrite systems, while a significant portion of inorganic electrons participated in dissimilatory nitrate reduction to ammonium process in the pyrite system. These findings provide valuable insights for practical applications of pyrite and pyrrhotite-based constructed wetlands or MFC-CWs.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Chemistry, Multidisciplinary
Zi-Chao Wang, Pei-Pei Xie, Youjun Xu, Xin Hong, Shi-Liang Shi
Summary: The use of a bulky yet flexible chiral N-heterocyclic carbene (NHC) ligand in low-temperature Ni-catalyzed C-N cross-coupling has achieved high enantioselectivity with low barriers. Computational studies show that the rotations of multiple sigma-bonds on the chiral ligand can adapt to the changing needs of catalytic processes, making this design widely applicable to diverse transition states for challenging metal-catalyzed asymmetric cross-coupling reactions.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Engineering, Environmental
Xiaochuan Ran, Xinyi Zhang, Bin Zhao, Qiang An
Summary: This study investigates the dual effect of nitrate on AGS granulation and finds that nitrate feeding can initially promote granulation, but it inhibits granulation in the long-term. The study also provides evidence for the role of microbial factors related to denitrification and EPS production in the dual effect of nitrate. This research highlights the potential effects of nitrate on aerobic granulation, providing references for its utilization in nitrate-containing wastewater.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Agricultural Engineering
Li Wang, Chen Chen, Yueqin Tang, Baicang Liu
Summary: In this study, a novel hypothermic strain Pseudomonas reactans WL20-3 was found to exhibit excellent aerobic nitrate removal ability at 4°C. It showed high capabilities for the removal of nitrate, total dissolved nitrogen (TDN), and dissolved organic carbon (DOC), achieving impressive removal efficiencies. Transcriptome analysis revealed gene up-regulation in the nitrate removal pathway, as well as the up-regulation of ABC transporter genes and down-regulation of respiratory chain genes, which contributed to the strain's resistance mechanism at low temperature. In actual sewage, the inoculated strain WL20-3 achieved a nitrate removal efficiency of 70.70%.
BIORESOURCE TECHNOLOGY
(2023)
Article
Polymer Science
Tae-Rim Choi, Ye-Lim Park, Hun-Suk Song, Sun Mi Lee, Sol Lee Park, Hye Soo Lee, Hyun-Joong Kim, Shashi Kant Bhatia, Ranjit Gurav, Kwon-Young Choi, Yoo Kyung Lee, Yung-Hun Yang
Summary: The Arctic bacteria Pseudomonas sp. B14-6 has been found to produce polyhydroxyalkanoate (PHA) from various carbon sources, with a high medium-chain-length content, low glass transition temperature, and low crystallinity, indicating potential use in medical applications.
Article
Chemistry, Applied
Tristan Rath, Broder Ruehmann, Jochen Schmid, Volker Sieber
Summary: The study focused on the production of exopolysaccharides (EPS) by Gluconacetobacter sp., with glycerol as a beneficial carbon source compared to glucose, and crude glycerol as a potential substitute. Optimal parameters resulted in a high EPS titer and productivity, with varying peptone concentrations leading to changes in monomer ratios and molecular size distribution. Multiple polysaccharides were identified, with the main one composed of glucose, galactose, mannose, and glucuronic acid, and a minor one of galactose, mannose, and ribose.
CARBOHYDRATE POLYMERS
(2022)
Article
Chemistry, Organic
Jiawen Yin, Xiao Zhang, Lulu Zhao, Mengqi Luo, Lin Guo, Chao Yang, Wujiong Xia
Summary: An electrochemically enabled C(sp(3))-C(sp) cross-coupling reaction is introduced for the synthesis of internal alkynes. This method is applicable to a diverse range of acetylenic sulfones and alkyl radical precursors. It can also be used for vinylation, thioetherification, selenation, and hydrogenation reactions. The reaction offers several significant advantages including mild conditions, broad functional group tolerance, simple operation, and easy purification and scale-up.
ORGANIC CHEMISTRY FRONTIERS
(2023)
Article
Plant Sciences
M. M. Aci, A. Lupini, A. Mauceri, F. Sunseri, M. R. Abenavoli
Summary: The study revealed that under short-term nitrate limiting supply, the genotype RO showed higher nitrate storage and remobilization abilities compared to UC82, while under long-term limiting conditions, the two genotypes exhibited differential gene expression levels related to nitrate assimilation and allocation. These results suggest that the Nitrogen Utilization Efficiency component plays a central role in enhancing Nitrogen Use Efficiency in tomato plants.
PLANT PHYSIOLOGY AND BIOCHEMISTRY
(2021)
Article
Plant Sciences
Thanh-Hau Huynh, Jayho Lee, Dong Hyun Moon, Thanh Quang Nguyen, Sangkeun Son, Sunghoon Hwang, Young Eun Du, Jinsheng Cui, Jae-Hyuk Jang, Sang-Jip Nam, Jongheon Shin, Jichan Jang, Sang Kook Lee, Ki-Bong Oh, Dong-Chan Oh
Summary: Single-strain cultivation of a mountain soil-derived Streptomyces sp. GA02 and its coculture with Pandoraea sp. GA02N produced two aromatic products, gwanakosides A and B, which displayed inhibitory and antiproliferative activities against pathogenic bacteria and human cancer cell lines, respectively. The chemical structures, absolute configurations, and bioactivities of these compounds were elucidated through spectroscopic analysis, quantum mechanics-based methods, and chemical derivatization followed by biological assays.
JOURNAL OF NATURAL PRODUCTS
(2022)
Article
Microbiology
Anastasia A. Ivanova, Olesya I. Sazonova, Anton N. Zvonarev, Yanina A. Delegan, Rostislav A. Streletskii, Lidia A. Shishkina, Alexander G. Bogun, Anna A. Vetrova
Summary: The complete genome of Pseudomonas sp. strain OVF7, a strain capable of degrading naphthalene and n-alkanes, was analyzed. The genes responsible for the degradation of naphthalene and n-alkanes were found on the chromosome. Based on genetic comparison with other fluorescent pseudomonads, the bacterium studied may belong to a new species. Additionally, the strain was able to form biofilms of different architectures when cultured in liquid mineral medium with different carbon sources, including naphthalene and n-dodecane.
Article
Environmental Sciences
Yi Zhang, Jing Zhang, Jun Li, Pengyuan Wei, Rong Luo, Hao Han
Summary: By adding enhanced ANAMMOX granules (LT-granules) into the inoculated denitrification sludge, the fast start-up of ANAMMOX biofilm processes at low temperatures (18 ± 3℃) was achieved in this study.
ENVIRONMENTAL RESEARCH
(2022)
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)