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Characterization of soil low-molecular-weight organic acids in the Karst rocky desertification region

Xiaoliang LI, Xiaomin CHEN, Xia LIU, Lianchuan ZHOU, Xinqiang YANG

Frontiers of Environmental Science & Engineering 2012, Volume 6, Issue 2,   Pages 195-203 doi: 10.1007/s11783-012-0391-1

Abstract: Soil low-molecular-weight (LMW) organic acids play important roles in the soil-forming process and theIn this study, we quantified the contents of LMW organic acids (including lactate, acetate, formate,The concentration of total LMW organic acids in topsoil solution ranged from 0.358 to 1.823 μmol·g ,The concentrations of the LMW organic acids were significantly positive correlated each other.Significant positive correlations were also observed among individual LMW organic acids in soil solution

Keywords： Karst rocky desertification     low-molecular-weight (LMW) organic acids     distribution characteristics     soil    

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Effects of a dynamic membrane formed with polyethylene glycol on the ultrafiltration of natural organic

Boksoon KWON, Noeon PARK, Jaeweon CHO,

Frontiers of Environmental Science & Engineering 2010, Volume 4, Issue 2,   Pages 172-182 doi: 10.1007/s11783-010-0002-y

Abstract: The formation of a dynamic membrane (DM) was investigated using polyethylene glycol (PEG) (molecularweight of 35000 g/mol, concentration of 1 g/L).Two natural organic matters (NOM), Dongbok Lake NOM (DLNOM) and Suwannee River NOM (SRNOM) were usedweight cut off ( MWCO) were determined.ultrafiltration membrane pores by increasing the retention coefficient of NOM in UF membranes, and (2) low

Keywords： dynamic membrane     natural organic matters     ultrafiltration membrane performance     effective PSD     effectivemolecular weight cutoff    

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Effects of organic acids on Cd adsorption and desorption by two anthropic soils

Jingui WANG, Jialong LV, Yaolong FU

Frontiers of Environmental Science & Engineering 2013, Volume 7, Issue 1,   Pages 19-30 doi: 10.1007/s11783-012-0424-9

Abstract: Cadmium adsorption and desorption were studied under a range of temperatures (25°C, 30°C, 35°C, 40°C), organicHowever, different concentrations of organic acids showed various influences on the two soils.Although the types of organic acids and soil properties were different, the effects of the organic acidsThe adsorption percentage of Cd generally decreased as organic acid concentrations increased.In contrast, the desorption percentage of Cd increased with increasing concentrations of organic acids

Keywords： adsorption     desorption     cadmium     organic acids     temperature     anthropic soil    

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Factors controlling

Chengkun WANG, Xiaojian ZHANG, Chao CHEN, Jun WANG

Frontiers of Environmental Science & Engineering 2013, Volume 7, Issue 2,   Pages 151-157 doi: 10.1007/s11783-013-0482-7

Abstract: Dissolved organic matter from the transported Luan River water as water source of Tianjin was fractionatedwith different XAD resins and a series of ultra-filtration membranes with molecular weight (MW) cut-offsNDMA formation increased as the dissolved organic carbon (DOC) to dissolved organic nitrogen (DON) ratio

Keywords： N-nitrosodimethylamine (NDMA)     disinfection by-product     dissolved organic nitrogen (DOC)     hydrophilic     molecular weight (MW)     specific ultraviolet absorbance at 254 nm (SUVA254)    

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Characterization of the dissolved organic matter in sewage effluent of sequence batch reactor: the impact

Jin GUO, Feng SHENG, Jianhua GUO, Xiong YANG, Mintao MA, Yongzhen PENG

Frontiers of Environmental Science & Engineering 2012, Volume 6, Issue 2,   Pages 280-287 doi: 10.1007/s11783-011-0336-0

Abstract: Dissolved organic matter (DOM) transformation in sequence batch reactor (SBR) fed with carbon sourcesDuring the biologic degradation process, the low molecular weight (MW) fraction (<1 kDa) gradually decreasedfed with sodium acetate or glucose, while the EPS from SBR fed with slowly biodegradable dissolved organicOrganic carbon with MW>1 kDa as well as the hydrophobic fraction in DOM gradually increased with the

Keywords： effluent organic matter (EfOM)     extracellular polymeric substance (EPS)     molecular weight distribution    

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Anaerobic digestion of sludge by different pretreatments: Changes of amino acids and microbial community

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 2, doi: 10.1007/s11783-021-1458-7

Abstract:

•Tryptophan protein, and aromatic protein I/II were the key identified proteins.

Keywords： Sludge pretreatments     Dissolved organic nitrogen     Proteins     Amino acids     Structural equation model     Metagenomic    

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Uncovering the effect of poly(ethylene-co-vinyl alcohol) molecular weight and vinyl alcohol content on

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 10,   Pages 1484-1502 doi: 10.1007/s11705-023-2331-y

Abstract: Various hydrophilic poly(ethylene-co-vinyl alcohol) (EVOH) were used herein to precisely control the structure and hydrodynamic properties of polysulfone (PSF) membranes. Particularly, to prepare pristine PSF and PSF/EVOH blends with increasing vinyl alcohol (VOH: 73%, 68%, 56%), the non-solvent-induced phase separation (NIPS) technique was used. Polyethylene glycol was used as a compatibilizer and as a porogen in N,N-dimethylacetamide. Rheological and ultrasonic separation kinetic measurements were also carried out to develop an ultrafiltration membrane mechanism. The extracted membrane properties and filtration capabilities were systematically compared to the proposed mechanism. Accordingly, the addition of EVOH led to an increase in the rheology of the dopes. The resulting membranes exhibited a microporous structure, while the finger-like structures became more evident with increasing VOH content. The PSF/EVOH behavior was changed from immediate to delayed segregation due to a change in the hydrodynamic kinetics. Interestingly, the PSF/EVOH32 membranes showed high hydrophilicity and achieved a pure water permeability of 264 L·m–2·h–1·bar–1, which was higher than that of pure PSF membranes (171 L·m–2·h–1·bar–1). In addition, PSF/EVOH32 rejected bovine serum albumin at a high rate (> 90%) and achieved a significant restoration of permeability. Finally, from the thermodynamic and hydrodynamic results, valuable insights into the selection of hydrophilic copolymers were provided to tailor the membrane structure while improving both the permeability and antifouling performance.

Keywords： polysulfone     blend modification     ultrafiltration membrane     formation hydrodynamics     poly(ethylene-co-vinyl alcohol) copolymer    

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Validation of polarizable force field parameters for nucleic acids by inter-molecular interactions

Liaoran Cao,Hong Ren,Jing Miao,Wei Guo,Yan Li,Guohui Li

Frontiers of Chemical Science and Engineering 2016, Volume 10, Issue 2,   Pages 203-212 doi: 10.1007/s11705-016-1572-4

Abstract: Modeling structural and thermodynamic properties of nucleic acids has long been a challenge in the developmentproved to be reliable to model small molecules, polypeptides and proteins, but their use on nucleic acidsIn this article, the interactions between nucleic acids and a small molecule or ion were modeled by AMOEBAbio09

Keywords： nucleic acid     polarizable force field     AMOEBA    

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Perfluoroalkane acids in human milk under the global monitoring plan of the Stockholm Convention on PersistentOrganic Pollutants (2008–2019)

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 10, doi: 10.1007/s11783-022-1541-8

Abstract:

● Perfluorooctanesulfonic acid and perfluorooctanoic acid highest in human milk.

Keywords： Human biomonitoring     Human breast milk     LC-MS/MS analysis     Lifestyle parameters    

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Effects of molecular weight and concentration of carboxymethyl cellulose on morphology of hydroxyapatite

Ruiqiang LIU,Rattan LAL

Frontiers of Environmental Science & Engineering 2015, Volume 9, Issue 5,   Pages 804-812 doi: 10.1007/s11783-015-0785-y

Abstract: In this paper, two types of CMC, with respective molecular weights (MW) of ~120000 and ~240000 Dalton

Keywords： nanotechnology     nanoparticles     apatite     carboxymethyl cellulose (CMC)     particle size    

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Low-carbohydrate diets lead to greater weight loss and better glucose homeostasis than exercise: a randomized

Frontiers of Medicine 2021, Volume 15, Issue 3,   Pages 460-471 doi: 10.1007/s11684-021-0861-6

Abstract: This study enrolled adults with overweight or obesity to explore whether either low-carbohydrate dietAfter the interventions, LCD led to a larger weight loss than EX (−3.56±0.37 kg vs. −1.24±0.39 kg, low-density lipoprotein cholesterol increased inCompared with exercise, LCD might be more efficient for weight loss and glucose homeostasis in people

Keywords： low-carbohydrate diet     obesity     nonalcoholic fatty liver disease     continuous glucose monitoring     mean    

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Tetra-detector size exclusion chromatography characterization of molecular and solution properties of

Qingbin Guo,Sheng Chang

Frontiers of Environmental Science & Engineering 2017, Volume 11, Issue 2, doi: 10.1007/s11783-017-0922-x

Abstract: Tetra-detector HPSEC was evaluated for the SMP characterization Molecular weight and intrinsic viscosityIn this study, the distributions of the absolute molecular weight and intrinsic viscosity of SMP polysaccharideschromatography (HPSEC) that was coupled with the refractive index (RI), diode array UV (DAUV), right and lowcalibration relationship for the SMP polysaccharides was developed and the molecular conformations,average molecular weights, and hydrodynamic sizes of the SMP polysaccharides were also explored.

Keywords： Soluble microbial product     Extracellular polymeric substance     Membrane bioreactor     Membrane fouling     Molecularweight     Intrinsic viscosity    

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vanbaalenii PYR-1 endowed with an enhanced activity of dihydroxylation of high-molecular-weight

Yiquan Wu, Ying Xu, Ningyi Zhou

Frontiers of Environmental Science & Engineering 2020, Volume 14, Issue 1, doi: 10.1007/s11783-019-1193-5

Abstract: . • Both NidA3B3 and FNidA3B3 catalyze high-molecular-weight PAHs dihydroxylation. • NidA3B3 shows anNidA3B3 is a terminal dioxygenase whose favorable substrates are high-molecular-weight polyaromatic hydrocarbons

Keywords： Biodegradation     polyaromatic hydrocarbons     biotransformation     ring-hydroxylating dioxygenase system    

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oxidizing environment on digestate humification and identification of substances governing the dissolved organic

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 8, doi: 10.1007/s11783-022-1520-0

Abstract:

• Liquid digestate humification was investigated under different oxidizing environment.

Keywords： Liquid digestate     MnO2     Oxygen     DOM transformation     Humic-like acids    

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Bile acids and their effects on diabetes

Cynthia Rajani, Wei Jia

Frontiers of Medicine 2018, Volume 12, Issue 6,   Pages 608-623 doi: 10.1007/s11684-018-0644-x

Abstract: Diabetes is a widespread, rapidly increasing metabolic disease that is driven by hyperglycemia. Early glycemic control is of primary importance to avoid vascular complications including development of retinal disorders leading to blindness, end-stage renal disease, and accelerated atherosclerosis with a higher risk of myocardial infarction, stroke and limb amputations. Even after hyperglycemia has been brought under control, “metabolic memory,” a cluster of irreversible metabolic changes that allow diabetes to progress, may persist depending on the duration of hyperglycemia. Manipulation of bile acid (BA) receptors and the BA pool have been shown to be useful in establishing glycemic control in diabetes due to their ability to regulate energy metabolism by binding and activating nuclear transcription factors such as farnesoid X receptor (FXR) in liver and intestine as well as the G-protein coupled receptor, TGR5, in enteroendocrine cells and pancreatic -cells. The downstream targets of BA activated FXR, FGF15/21, are also important for glucose/insulin homeostasis. In this review we will discuss the effect of BAs on glucose and lipid metabolism and explore recent research on establishing glycemic control in diabetes through the manipulation of BAs and their receptors in the liver, intestine and pancreas, alteration of the enterohepatic circulation, bariatric surgery and alignment of circadian rhythms.

Keywords： bile acids     metabolic memory     diabetes     circadian rhythm     bariatric surgery    

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Title Author Date Type Operation

Characterization of soil low-molecular-weight organic acids in the Karst rocky desertification region

Xiaoliang LI, Xiaomin CHEN, Xia LIU, Lianchuan ZHOU, Xinqiang YANG

Journal Article

Effects of a dynamic membrane formed with polyethylene glycol on the ultrafiltration of natural organic

Boksoon KWON, Noeon PARK, Jaeweon CHO,

Journal Article

Effects of organic acids on Cd adsorption and desorption by two anthropic soils

Jingui WANG, Jialong LV, Yaolong FU

Journal Article

Factors controlling

Chengkun WANG, Xiaojian ZHANG, Chao CHEN, Jun WANG

Journal Article

Characterization of the dissolved organic matter in sewage effluent of sequence batch reactor: the impact

Jin GUO, Feng SHENG, Jianhua GUO, Xiong YANG, Mintao MA, Yongzhen PENG

Journal Article

Anaerobic digestion of sludge by different pretreatments: Changes of amino acids and microbial community

Journal Article

Uncovering the effect of poly(ethylene-co-vinyl alcohol) molecular weight and vinyl alcohol content on

Journal Article

Validation of polarizable force field parameters for nucleic acids by inter-molecular interactions

Liaoran Cao,Hong Ren,Jing Miao,Wei Guo,Yan Li,Guohui Li

Journal Article

Perfluoroalkane acids in human milk under the global monitoring plan of the Stockholm Convention on PersistentOrganic Pollutants (2008–2019)

Journal Article

Effects of molecular weight and concentration of carboxymethyl cellulose on morphology of hydroxyapatite

Ruiqiang LIU,Rattan LAL

Journal Article

Low-carbohydrate diets lead to greater weight loss and better glucose homeostasis than exercise: a randomized

Journal Article

Tetra-detector size exclusion chromatography characterization of molecular and solution properties of

Qingbin Guo,Sheng Chang

Journal Article

vanbaalenii PYR-1 endowed with an enhanced activity of dihydroxylation of high-molecular-weight

Yiquan Wu, Ying Xu, Ningyi Zhou

Journal Article

oxidizing environment on digestate humification and identification of substances governing the dissolved organic

Journal Article

Bile acids and their effects on diabetes

Cynthia Rajani, Wei Jia

Journal Article