keyword
https://read.qxmd.com/read/38535914/adsorption-and-desorption-behavior-and-mechanism-of-ruthenium-in-nitrite-nitric-acid-system
#1
JOURNAL ARTICLE
Cong Li, Chao Xie, Tianjiao Jiang, Lifeng Chen, Shunyan Ning, Caiwu Luo, Qi Zheng, Ji Wang, Yuezhou Wei
Ruthenium is required to separate from high-level liquid waste (HLLW) because Ru is a valuable resource and is negatively influential on the vitrification process of HLLW. However, the separation of Ru is very challenging due to its complicated complexation properties. In this study, the adsorption and desorption characteristics of ruthenium on a synthesized SiPyR-N3 (weak-base anion exchange resin with pyridine functional groups) composite were investigated in nitric acid and nitrite-nitric acid systems, respectively, and the adsorption mechanism was explored...
February 27, 2024: Toxics
https://read.qxmd.com/read/38535571/porcine-monocyte-dna-traps-formed-during-infection-with-pathogenic-clostridioides-difficile-strains
#2
JOURNAL ARTICLE
Jade Lawrence, Paul Barrow, Neil Foster
Clostridioides ( Clostridium ) difficile is an enteric pathogen of several mammalian species including man, frequently involving nosocomial resurgence, following oral administration of broad-spectrum antibiotics, but also with human-to-human infection occurring, and neonatal pigs with zoonotic transmission. To date, the immune response to C . difficile has mostly focused on neutrophils and cytokine/chemokines, particularly in human infection. The neonatal pig is now recognized as a valuable model for human infection...
March 5, 2024: Pathogens
https://read.qxmd.com/read/38528411/expression-of-concern-accumulation-of-nitrite-after-reclaimed-water-recharge-due-to-the-disinfection-byproduct-chlorite-chemosphere-volume-321-april-2023-138119
#3
JOURNAL ARTICLE
(no author information available yet)
No abstract text is available yet for this article.
April 2024: Chemosphere
https://read.qxmd.com/read/38527552/competitive-bio-augmentation-overcoming-unusual-direct-inhibitor-inefficacy-in-mainstream-nitrite-oxidizing-bacteria-suppression-unveiling-the-underpinnings-in-microbial-and-nitrogen-metabolism-aspects
#4
JOURNAL ARTICLE
Yanxiao Wei, Min Ye, Yujie Chen, Yu-You Li
The long-stabilized mainstream partial nitritation/Anammox (PN/A) process continues to encounter significant challenges from nitrite-oxidizing bacteria (NOB). Therefore, this study aimed to determine an efficient, rapid, and easily implementable strategy for inhibiting NOB. A laboratory-scale reactor was operated continuously for 325 days, experiencing NOB outbreak in mainstream and recovery with simulated sidestream support. The results show that direct inhibitory strategies including intermittent aeration and approximately 35 mg/L free ammonia had unusual weak inhibitory effects on NOB activity...
March 23, 2024: Science of the Total Environment
https://read.qxmd.com/read/38525081/from-acidophilic-to-ornithogenic-microbial-community-dynamics-in-moss-banks-altered-by-gentoo-penguins
#5
JOURNAL ARTICLE
Yevheniia Prekrasna-Kviatkovska, Ivan Parnikoza, Anna Yerkhova, Olesia Stelmakh, Mariia Pavlovska, Marta Dzyndra, Oleksandr Yarovyi, Evgen Dykyi
INTRODUCTION: The study explores the indirect impact of climate change driven by gentoo's penguin colonization pressure on the microbial communities of moss banks formed by Tall moss turf subformation in central maritime Antarctica. METHODS: Microbial communities and chemical composition of the differently affected moss banks (Unaffected, Impacted and Desolated) located on Galindez Island and Сape Tuxen on the mainland of Kyiv Peninsula were analyzed. RESULTS: The native microbiota of the moss banks' peat was analyzed for the first time, revealing a predominant presence of Acidobacteria (32...
2024: Frontiers in Microbiology
https://read.qxmd.com/read/38524764/-methylomonadaceae-was-the-active-and-dominant-methanotroph-in-tibet-lake-sediments
#6
JOURNAL ARTICLE
Yongcui Deng, Chulin Liang, Xiaomeng Zhu, Xinshu Zhu, Lei Chen, Hongan Pan, Fan Xun, Ye Tao, Peng Xing
Methane (CH4 ), an important greenhouse gas, significantly impacts the local and global climate. Our study focused on the composition and activity of methanotrophs residing in the lakes on the Tibetan Plateau, a hotspot for climate change research. Based on the field survey, the family Methylomonadaceae had a much higher relative abundance in freshwater lakes than in brackish and saline lakes, accounting for ~92% of total aerobic methanotrophs. Using the microcosm sediment incubation with 13 CH4 followed by high throughput sequencing and metagenomic analysis, we further demonstrated that the family Methylomonadaceae was actively oxidizing CH4 ...
January 2024: ISME Commun
https://read.qxmd.com/read/38523057/do-oral-and-gut-microbiota-communicate-through-redox-pathways-a-novel-asset-of-the-nitrate-nitrite-no-pathway
#7
REVIEW
Beatriz Paiva, João Laranjinha, Bárbara S Rocha
Nitrate may act as a regulator of • NO bioavailability via sequential reduction along the nitrate-nitrite-NO pathway with widespread health benefits, including a eubiotic effect on the oral and gut microbiota. Here, we discuss the molecular mechanisms of microbiota-host communication through redox pathways, via the production of • NO and oxidants by the family of NADPH oxidases, namely hydrogen peroxide (via Duox2), superoxide radical (via Nox1 and Nox2) and peroxynitrite, which leads to downstream activation of stress responses (Nrf2 and NFkB pathways) in the host mucosa...
March 24, 2024: FEBS Letters
https://read.qxmd.com/read/38522528/stable-continuous-flow-candan-process-transitioning-from-anammox-uasb-reactor-by-facilitating-indigenous-nitrite-producing-denitrification-community
#8
JOURNAL ARTICLE
Rui Du, Meihui Tang, Qingtao Liu, Shenbin Cao, Yongzhen Peng
The emerging nitrogen removal process known as CANDAN (Complete Ammonium and Nitrate removal via Denitratation-Anammox over Nitrite) has been developed in Sequencing Batch Reactors (SBRs). Yet, starting up and maintaining stability in continuous-flow reactors remain challenging. This study explores the feasibility of transitioning the CANDAN process from an anammox-dominated process by introducing appropriate external organics to facilitate indigenous nitrite-producing denitrification community in an Upflow Anaerobic Sludge Blanket (UASB) reactor...
March 22, 2024: Science of the Total Environment
https://read.qxmd.com/read/38521782/potential-use-of-sludge-from-el-ferrol-bay-chimbote-peru-for-the-production-of-lipids-in-the-culture-of-scenedesmus-acutus-meyen-1829
#9
JOURNAL ARTICLE
Fernando Merino, Sorayda Mendoza, Juan Carhuapoma-Garay, Luis Campoverde-Vigo, Yolanda P Huamancondor-Paz, Yudith Choque-Quispe, Dianeth Buleje Campos, David Choque-Quispe, Liliana Rodriguez-Cardenas, Guillermo B Saldaña-Rojas, Rómulo E Loayza-Aguilar, Gustavo E Olivos-Ramirez
Despite the extensive development of microalgae biotechnology, it still requires new methodologies to lower production costs, especially in the field of biofuel production. Therefore, innovative methods that facilitate operations and enable cost-effective production are important in driving this industry. In this study, we propose a new low-cost and easy-to-use procedure, addressed to the generation of a culture medium for Scenedesmus acutus. The medium was obtained by thermal reduction of a sludge sample from El Ferrol Bay (Chimbote, Peru), whereby we obtained an aqueous medium...
March 23, 2024: Scientific Reports
https://read.qxmd.com/read/38521727/revisiting-methane-dependent-denitrification
#10
JOURNAL ARTICLE
Mengxiong Wu, Tao Liu, Jianhua Guo
Methane-dependent denitrification links the global nitrogen and methane cycles. Since its initial discovery in 2006, this process has been understood to involve a division of labor between an archaeal group and a bacterial group, which sequentially perform nitrate and nitrite reduction, respectively. Yao et al. have now revised this paradigm by identifying a Methylomirabilis bacterium capable of performing methane-dependent complete denitrification on its own.
March 22, 2024: Trends in Microbiology
https://read.qxmd.com/read/38521307/nitric-oxide-releasing-thiolated-starch-nanoparticles-embedded-in-gelatin-sponges-for-wound-dressing-applications
#11
JOURNAL ARTICLE
Niyousha Davari, Jhamak Nourmohammadi, Javad Mohammadi
This study introduces a novel wound dressing by combining nitric oxide-releasing thiolated starch nanoparticles (NO-TS NPs) with gelatin. First, starch was thiolated (TS), and then its nanoparticles were prepared (TS NPs). Subsequently, NPs were covalently bonded to sodium nitrite to obtain NO-releasing TS NPs (NO-TS-NPs) that were incorporated into gelatin sponges at various concentrations. The resulting spherical TS NPs had a mean size of 85.42 ± 5.23 nm, which rose to 100.73 ± 7...
March 21, 2024: International Journal of Biological Macromolecules
https://read.qxmd.com/read/38520903/recent-advances-in-metal-oxide-nanozyme-based-optical-biosensors-for-food-safety-assays
#12
REVIEW
Jing Qin, Ningning Guo, Jia Yang, Jing Wei
Metal oxide nanozymes are emerging as promising materials for food safety detection, offering several advantages over natural enzymes, including superior stability, cost-effectiveness, large-scale production capability, customisable functionality, design options, and ease of modification. Optical biosensors based on metal oxide nanozymes have significantly accelerated the advancement of analytical research, facilitating the rapid, effortless, efficient, and precise detection and characterisation of contaminants in food...
March 13, 2024: Food Chemistry
https://read.qxmd.com/read/38520779/enhanced-nitrogen-removal-via-partial-nitrification-denitrification-coupled-anammox-using-three-stage-anoxic-oxic-biofilm-process-with-intermittent-aeration
#13
JOURNAL ARTICLE
Zhuang Zhang, Deyong Li, Changhui Zhou, Xiaoshan Huang, Yantong Chen, Shijie Wang, Guoqiang Liu
Pre-capturing organics in municipal wastewater for biogas production, combined with Anammox-based nitrogen removal process, improves the sustainability of sewage treatment. Thus, enhancing nitrogen removal via Anammox in mainstream wastewater treatment becomes very crucial. In present study, a three-stage anoxic/oxic (AO) biofilm process with intermittent aeration was designed to strengthen partial nitrification/denitrification coupling Anammox (PNA/PDA) in treatment of low C/N wastewater, which contained chemical oxygen demand (COD) of 79...
March 19, 2024: Water Research
https://read.qxmd.com/read/38519184/food-additives-impair-gut-microbiota-from-healthy-individuals-and-ibd-patients-in-a-colonic-in-vitro-fermentation-model
#14
JOURNAL ARTICLE
Irma Gonza, Elizabeth Goya-Jorge, Caroline Douny, Samiha Boutaleb, Bernard Taminiau, Georges Daube, Marie-Louise Scippo, Edouard Louis, Véronique Delcenserie
Intestinal fibrosis is a long-term complication of inflammatory bowel diseases (IBD). Changes in microbial populations have been linked with the onset of fibrosis and some food additives are known to promote intestinal inflammation facilitating fibrosis induction. In this study, we investigated how polysorbate 80, sucralose, titanium dioxide, sodium nitrite and maltodextrin affect the gut microbiota and the metabolic activity in healthy and IBD donors (patients in remission and with a flare of IBD). The Simulator of the Human Intestinal Microbial Ecosystem (SHIME®) with a static (batch) configuration was used to evaluate the effects of food additives on the human intestinal microbiota...
April 2024: Food Research International
https://read.qxmd.com/read/38518918/regulatory-of-salinity-on-assembly-of-activated-sludge-microbial-communities-and-nitrogen-transformation-potential-in-industrial-plants-of-the-lower-yangtze-river-basin
#15
JOURNAL ARTICLE
Yifan Jiang, Ding Ma, Wang Jin, Qingsheng Xu, Jintao Fang, Yue Zhengbo
This study aims to thoroughly investigate the impact mode of salinity carried by industrial wastewater on the anaerobic-anoxic-oxic (A2 O) sludge in wastewater treatment plants (WWTPs). Through comprehensive investigation of the A2 O stage activated sludge (AS) from 19 industrial WWTPs in the downstream area of the Yangtze River, China, A total of 38 samples of anaerobic sludge and oxic sludge were collected and analyzed. We found that salinity stress significantly inhibits the growth of the AS community, particularly evident in the anaerobic sludge community...
March 20, 2024: Environmental Research
https://read.qxmd.com/read/38518879/new-insights-into-nitrogen-removal-by-divalent-iron-enhanced-moving-bed-biofilm-reactor-performance-interfacial-interaction-and-co-occurrence-network
#16
JOURNAL ARTICLE
Mengcheng Sheng, Zhiqing Ye, Fang Zhu, Dandan Pan, Sicheng Shao, Xiangwei Wu
A divalent iron-mediated moving bed biofilm reactor with intermittent aeration was developed to enhance the nitrogen removal at low carbon-to-nitrogen ratios. The study demonstrated thatammonia removal increased from 51 ± 4 % to 79 ± 4 % and nitrate removal increased from 72 ± 5 % to 98 ± 4 % in phases I-IV, and 2-5 mg·L-1 of divalent iron significantly increased the anoxic denitrification process. Divalent iron stimulated the secretion of extracellular polymeric substances, which facilitated the formation of cross-linked network between microbial cells...
March 20, 2024: Bioresource Technology
https://read.qxmd.com/read/38518702/evaluation-of-ecological-impacts-with-ferrous-iron-addition-in-constructed-wetland-under-perfluorooctanoic-acid-stress
#17
JOURNAL ARTICLE
Xiuwen Qian, Juan Huang, Chunni Yan, Jun Xiao, Chong Cao, Yufeng Wu, Luming Wang
In this study, ferrous ion (Fe(II)) had the potential to promote ecological functions in constructed wetlands (CWs) under perfluorooctanoic acid (PFOA) stress. Concretely, Fe(II) at 30 mg/L and 20-30 mg/L even led to 11.37% increase of urease and 93.15-243.61% increase of nitrite oxidoreductase respectively compared to the control. Fe(II) promotion was also observed on Nitrosomonas, Nitrospira, Azospira, and Zoogloea by 1.00-6.50 folds, which might result from higher expression of nitrogen fixation and nitrite redox genes...
March 19, 2024: Journal of Hazardous Materials
https://read.qxmd.com/read/38518621/nano-palladium-decorated-bismuth-sulfide-microspheres-on-a-disposable-electrode-integrated-with-smartphone-based-electrochemical-detection-of-nitrite-in-food-samples
#18
JOURNAL ARTICLE
Kiattisak Promsuwan, Jenjira Saichanapan, Asamee Soleh, Kasrin Saisahas, Kritsada Samoson, Sangay Wangchuk, Proespichaya Kanatharana, Panote Thavarungkul, Warakorn Limbut
Nitrite (NO2 - ) is widely used as an additive to extend the shelf life of food products. Excessive nitrite intake not only causes blood-related diseases but also has the potential risk of causing cancers. A disposable screen-printed electrode was modified with nano‑palladium decorated bismuth sulfide microspheres (nanoPd@Bi2 S3 MS/SPE), and integrated with a smartphone-interfaced potentiostat to develop a portable, electrochemical nitrite sensor. NanoPd@Bi2 S3 MS was prepared by the hydrothermal reduction of a Bi2 S3 MS and Pd2+ dispersion and drop cast on the SPE...
March 13, 2024: Food Chemistry
https://read.qxmd.com/read/38518501/promoting-nitrogen-conversion-in-aerobic-biotransformation-of-swine-slurry-with-the-co-application-of-manganese-sulfate-and-biochar
#19
JOURNAL ARTICLE
Xuan Wu, Xinyu Zhao, Guorong Yi, Wanqiang Zhang, Runyu Gao, Daniel Kuok Ho Tang, Ran Xiao, Zengqiang Zhang, Yiqing Yao, Ronghua Li
This study aimed to explore the co-application of MnSO4 (Mn) and biochar (BC) in nitrogen conversion during the composting process. A 70-day aerobic composting was conducted using swine slurry, supplemented with different levels of Mn (0, 0.25%, and 0.5%) and 5% BC. The results demonstrated that the treatment with 0.5MnBC had the highest levels of NH4 + -N (3.07 g kg-1 ), TKN (29.90 g kg-1 ), and NO3 - -N (1.94 g kg-1 ) among all treatments. Additionally, the 0.5MnBC treatment demonstrated higher urease, protease, nitrate reductase, and nitrite reductase activities than the other treatments, with the peak values of 18...
March 21, 2024: Journal of Environmental Management
https://read.qxmd.com/read/38518228/influence-of-pallet-rich-plasma-quercetin-and-their-combination-on-activity-of-nitric-oxide-cycle-enzymes-in-nasal-mucosa-of-patients-with-atrophic-rhinitis
#20
JOURNAL ARTICLE
Ruslan V Bondarenko, Sergey B Bezshapochnyy, Mychailo I Bezega, Valerii V Loburets, Vitilii O Kostenko, Oleh Ye Akimov, Alevtyna M Bilous
OBJECTIVE: Aim: To study the general activity of NO synthases (gNOS), the activity of inducible and constitutive isoforms of NO synthase, the activity of arginases, and the concentration of nitrites in the nasal mucosa under the conditions of local treatment of chronic atrophic rhinitis (AR) with quercetin and platelet-rich plasma (PRP therapy).. PATIENTS AND METHODS: Materials and Methods: The study was conducted on 118 patients divided into two groups: control (n=20) and experimental (patients with AR, n=98)...
2024: Polski Merkuriusz Lekarski: Organ Polskiego Towarzystwa Lekarskiego
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