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Enhanced disinfection of <em>Escherichia coliem> and bacteriophage

Guiying RAO, Kristen S. BRASTAD, Qianyi ZHANG, Rebecca ROBINSON, Zhen HE, Ying LI

Frontiers of Environmental Science & Engineering 2016, Volume 10, Issue 4, doi: 10.1007/s11783-016-0854-x

Abstract: A novel photocatalytic Ag-Cu-TiO nanowire membrane was fabricated. Bacteria and virus disinfection was improved by co-depositing Ag and Cu onto membrane. Synergetic photocatalytic effects and free metal ions of Ag and Cu contribute to disinfection. 7.68 log removal of and 4.02 log removal of bacteriophage MS2 were achieved. Titanium dioxide (TiO ) is a widely used photocatalyst that has been demonstrated for microorganism disinfection in drinking water. In this study, a new material with a novel structure, silver and copper loaded TiO nanowire membrane (Cu-Ag-TiO ) was prepared and evaluated for its efficiency to inactivate and bacteriophage MS2. Enhanced photo-activated bactericidal and virucidal activities were obtained by the Cu-Ag-TiO membrane than by the TiO , Ag-TiO and Cu-TiO membranes under both dark and UV light illumination. The better performance was attributed to the synergies of enhanced membrane photoactivity by loading silver and copper on the membrane and the synergistic effect between the free silver and copper ions in water. At the end of a 30 min test of dead-end filtration under 254 nm UV irradiation, the Cu-Ag-TiO membrane was able to obtain an removal of 7.68 log and bacteriophage MS2 removal of 4.02 log, which have met the US EPA standard. The free metal ions coming off the membrane have concentrations of less than 10 ppb in the water effluent, far below the US EPA maximum contaminant level for silver and copper ions in drinking water. Therefore, the photo-activated disinfection by the Cu-Ag-TiO membrane is a viable technique for meeting drinking water treatment standards of microbiological water purifiers.

Keywords： Photo-activated disinfection     Titanium dioxide     Nanowire membrane     Silver     Copper    

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Flow cytometric assessment of the effects of chlorine, chloramine, and UV on bacteria by using nucleic acid stains and 5-cyano-2,3-ditolyltetrazolium chloride

Xuebiao Nie, Wenjun Liu, Mo Chen, Minmin Liu, Lu Ao

Frontiers of Environmental Science & Engineering 2016, Volume 10, Issue 6, doi: 10.1007/s11783-016-0884-4

Abstract: Flow cytometry based on nucleic acid stains and CTC was established and optimized. Membrane of is more resistant to chlorine/chloramine than . The metabolic activity of bacteria persisted after the cytomembranewas damaged. showed more resistance to UV irradiation than by FCM. MP-UV was a stronger inhibitor of metabolic activity than LP-UV. Flow cytometry (FCM) has been widely used in multi-parametric assessment of cells in various research fields, especially in environmental sciences. This study detected the metabolic activity of and by using an FCM method based on 5-cyano-2,3-ditolyltetrazolium chloride (CTC); the accuracy of this method was enhanced by adding SYTO 9 and 10% R2A broth. The disinfection effects of chlorine, chloramine, and UV were subsequently evaluated by FCM methods. Chlorine demonstrated stronger and faster destructive effects on cytomembrane than chloramine, and nucleic acids decomposed afterwards. The metabolic activity of the bacteria persisted after the cytomembranewas damaged as detected using CTC. Low-pressure (LP) UV or medium-pressure (MP) UV treatments exerted no significant effects on membrane permeability. The metabolic activity of the bacteria decreased with increasing UV dosage, and MP-UV was a stronger inhibitor of metabolic activity than LP-UV. Furthermore, the membrane of Gram-positive was more resistant to chlorine/chloramine than that of Gram-negative . In addition, showed higher resistance to UV irradiation than .

Keywords： Flow cytometry     <em>Escherichia coliem>     <em>Staphylococcusaureusem>     UV     CTC     SYTO 9    

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Serum <em>Nem>-Glycan Markers for Diagnosing Significant Liver Fibrosis and Cirrhosis in Chronic Hepatitis Article

Lin Wang, Yiqi Liu, Qixin Gu, Chi Zhang, Lei Xu, Lei Wang, Cuiying Chen, Xueen Liu, Hong Zhao, Hui Zhuang

Engineering 2023, Volume 26, Issue 7,   Pages 151-158 doi: 10.1016/j.eng.2023.03.008

Abstract:

The aim of this study was to explore the role of serum <em>Nem>-glycomic-derived models in diagnosingSerum <em>Nem>-glycan profiles were tested using DNA sequencer-assisted fluorophore-assisted carbohydrateA total of nine <em>Nem>-glycan peaks were identified in serum samples for each subject.In distinguishing significant liver fibrosis, the diagnostic efficiency of the serum <em>Nem>-glycanIn distinguishing liver cirrhosis, the diagnostic AUROC curve of the serum <em>Nem>-glycan RF model

Keywords： Liver fibrosis     Chronic hepatitis B     Serum <em>Nem>-glycan     <em>Nem>-glycan model     Alanine aminotransferase    

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Temporal and spatial stability of the EM/PM molecular subtypes in adult diffuse glioma

Frontiers of Medicine 2023, Volume 17, Issue 2,   Pages 240-262 doi: 10.1007/s11684-022-0936-z

Abstract: After identifying conserved gene modules co-expressed with EGFR or PDGFRA (EM or PM), we recently proposedan EM/PM classification scheme for adult gliomas in a histological subtype- and grade-independent mannerRNA-seq samples, and clinical samples, we here demonstrate the temporal and spatial stability of the EMThe EM and PM subtypes, which progress in a subtype-specific mode, are robustly maintained in pairedWithin individual gliomas, the EM/PM subtype was preserved across regions and single cells.

Keywords： glioma progression     molecular classification     EM/PM subtyping     intratumor heterogeneity    

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Profound Diversity of the <em>Nem>-Glycome from Microdissected Regions of Colorectal Cancer, Stroma Article

Di Wang, Katarina Madunić , Tao Zhang, Guinevere S.M. Lageveen-Kammeijer, Manfred Wuhrer

Engineering 2023, Volume 26, Issue 7,   Pages 32-43 doi: 10.1016/j.eng.2022.08.016

Abstract: While the <em>Nem>-glycosylation of cell lines and serum has been widely examined, the analysis ofcancer-associated <em>Nem>-glycans from tissues has been hampered by the heterogeneity of tumors andthe complexity of <em>Nem>-glycan structures.In total, 116 <em>Nem>-glycans were identified that showed profound differences in expression among>Nem>-glycans, as well as a decrease in bisected <em>Nem>-glycans.

Keywords： Colorectal cancer     Tumor     Porous graphitized carbon liquid chromatography mass spectrometry     N-glycomics     Antibody response    

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Detection of Escherichia coli in wastewater based on enzyme immunoassay

XI Haiyan, CAI Qiang, HE Miao, SHI Hanchang

Frontiers of Environmental Science & Engineering 2007, Volume 1, Issue 3,   Pages 381-384 doi: 10.1007/s11783-007-0065-6

Abstract: This research describes a fast detection method on the basis of enzyme-linked immunosorbent assay (ELISA) for in drainage of wastewater treatment plants. Optimized conditions such as the reaction format (sandwich or direct), the concentrations of diluted horse radish peroxidase (HRP)- conjugate, and anti-HPR antibody and pretreatment of were studied. Those results showed that the linear range of detection for was 10 cfu/mL– 6 × 10 cfu/mL. Compared with conventional methods, it is a convenient and sensitive detection method with low cost.

Keywords： conventional     sandwich     pretreatment     enzyme-linked immunosorbent     detection    

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italic>rpoS deficiency suppresses acetate accumulation in glucose-enriched culture of Escherichiacoli under an aerobic condition

Prayoga SURYADARMA, Yoshihiro OJIMA, Yuto FUKUDA, Naohiro AKAMATSU, Masahito TAYA

Frontiers of Chemical Science and Engineering 2012, Volume 6, Issue 2,   Pages 152-157 doi: 10.1007/s11705-012-1287-0

Abstract: The role of on the central carbon metabolism was investigated through analyzing the deficiency of this regulon gene under aerobic and glucose-enriched culture conditions. The experimental results showed that while the wild type cells exhibited an overflow metabolism effect, the -deleting mutation alleviated this effect with the significant suppression of acetate accumulation under a high glucose condition. This gene deletion also induced the twofold upregulation of and one-tenth downregulation of , respectively. The overflow metabolism effect was confirmed to be recovered by re-introducing gene into the mutant. These results demonstrated changed the central carbon metabolism toward acetate overflow through dehydrogenation of pyruvate and reduction of TCA cycle activity.

Keywords： Escherichia coli     rpoS     aerobic and glucose-enriched culture     overflow    

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VITHM1 mediated green synthesis of silver nanoparticles: Mechanism and biological applications

Mani Abirami, Krishnan Kannabiran

Frontiers of Chemical Science and Engineering 2016, Volume 10, Issue 4,   Pages 542-551 doi: 10.1007/s11705-016-1599-6

Abstract: We present the microbial green synthesis of silver nanoparticles (NPs) by VITHM1 strain (MTCC No. 12465). The secondary metabolites in the cell free supernatant of this bacterium when incubated with 1 mmol/L AgNO , mediated the biological synthesis of AgNPs. The synthesized AgNPs were characterized by UV-visible spectrum, X-ray diffraction (XRD), atomic force microscope, scanning electron microscopy equipped with energy dispersive spectroscopy, transmission electron microscopy, FT-IR spectroscopy, dynamic light scattering and zeta potential. They were highly stable and, spherical in shape with the average size of 30?50 nm. The secondary metabolites involved in the formation of AgNPs were identified gas chromatography-mass spectrography. The 3D structure of the unit cell of the synthesized AgNPs was determined using XRD data base. The synthesized AgNPs exhibited significant antibacterial activity against tested bacterial pathogens, and did not show haemolysis on human red blood cells. This green synthesis could provide a new platform to explore and use AgNPs as antibacterial therapeutic agents.

Keywords： <em>Streptomyces ghanaensisem> VITHM1     nanoparticles     3D structure     antibacterial activity    

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Removable Dyes—The Missing Link for In-Depth <em>Nem>-Glycan Analysis via Multi-Method Approaches Article

Samanta Cajic, René Hennig, Valerian Grote, Udo Reichl, Erdmann Rapp

Engineering 2023, Volume 26, Issue 7,   Pages 132-150 doi: https://doi.org/10.1016/j.eng.2023.02.016

Abstract: Through the detailed structural analysis of selected, dauntingly complex <em>Nem>-glycans from chickenMoreover, this approach "visualizes" <em>Nem>-glycans that have been difficult to identify

Keywords： Glycoproteins     N-glycans     Reversible labeling     Hydrophilic interaction liquid chromatography     Capillary gel electrophoresis     Mass spectrometry    

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Novel Insight into the Etiology of Haff Disease by Mapping the <em>Nem>-Glycome with Orthogonal Mass Article

Si Liu, Yuanyuan Liu, Jiajing Lin, Bi-Feng Liu, Zhenyu He, Xiaomin Wu, Xin Liu

Engineering 2023, Volume 26, Issue 7,   Pages 63-73 doi: 10.1016/j.eng.2022.09.012

Abstract: Profiling of the <em>Nem>-glycome in HD would assist in deciphering the underlying molecular mechanism<em>Nem>-glycome profiles of both serum and serum-derived immunoglobulin G (IgG) in HD were characterized

Keywords： Haff disease     Serum     Immunoglobulin G     Glycosylation     Disease pathogenesis    

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Isolation and application of predatory

Ran Yu, Shiwen Zhang, Zhoukai Chen, Chuanyang Li

Frontiers of Environmental Science & Engineering 2017, Volume 11, Issue 1, doi: 10.1007/s11783-017-0900-3

Abstract: Indigenous predatory BALO strains were successfully isolated from activated sludge. Sludge SRF and CST were significantly reduced by BALOs induced biolysis process. The increase of BALO input dosage promoted the sludge biolysis efficiency. Sludge biolysis disintegrated flocs and lysed cells for internal water release. The optimal sludge biolysis time was 24 h and no pH adjustment was needed. -and-like organisms (BALOs) are a group of ubiquitous and obligate predatory bacteria and commonly used as biocontrol agents. In this study, an efficient, environmental-friendly, and convenient BALOs encouraged municipal waste sludge biolysis pretreatment technique was developed and investigated for dewaterability enhancement of excess waste sludge. The indigenous predatory BALOs were successfully isolated from the sludge for biolysis treatment. Without any chemical addition or pH adjustment, the sludge specific resistance (SRF) and capillary suction time (CST) were significantly reduced by as high as 53.4% and 23.8%, respectively within 24 h’s treatment, which would further be lowered with the increase of BALOs input dosage. However, the continuous extension of reaction time would worsen the sludge dewaterability. The decreases of SRF and CST accompanied with the increases of sludge disintegration degree and soluble chemical oxygen demand, nitrogen, and phosphorus concentrations all emphasized the contributions of BALOs’ predation activities to sludge disturbance, cell lysis, and consequently the release of sludge intracellular water to finally effectively improve the sludge dewaterability and disposal efficiency.

Keywords： <em>Bdellovibrioem>-and-like organisms (BALOs)     Biolysis     Activated sludge     Dewaterability     Predation    

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High-Throughput Profiling of Serological Immunoglobulin G <em>Nem>-Glycome as a Noninvasive Biomarker Article

Pengcheng Liu, Xiaobing Wang, Aishe Dun, Yutong Li, Houqiang Li, Lu Wang, Yichun Zhang, Cancan Li, Jinxia Zhang, Xiaoyu Zhang, Lixing Ma, Haifeng Hou

Engineering 2023, Volume 26, Issue 7,   Pages 44-53 doi: 10.1016/j.eng.2023.02.008

Abstract: ultra-performance liquid chromatography (HILIC-UPLC) was employed to analyze the composition of the plasma IgG <em>Nem>-glycome.In addition, the composition of IgG <em>Nem>-glycans was correlated with that of inflammatory cytokines(<em>rem> = 0.556).

Keywords： Gastrointestinal cancer     Glycosylation     Immunoglobulin G     Diagnostic biomarker    

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Mercury enrichment in

Chunhao Dai, Pufeng Qin, Zhangwei Wang, Jian Chen, Xianshan Zhang, Si Luo

Frontiers of Environmental Science & Engineering 2017, Volume 11, Issue 1, doi: 10.1007/s11783-017-0892-z

Abstract: Mercury enrichment in response to elevated atmospheric mercury concentrations in the organs of rape ( ) was investigated. Elevated soil mercury content had significant impact on mercury accumulation in rape stems, roots, seeds and seed coats. Leaf mercury in the leaves was mostly affected by atmospheric input while the stems were mostly affected by soil concentrations. Mercury in the aboveground plant tissue mainly derived from atmospheric absorption, and atmospheric mercury absorption in leaves was higher than that in the stems. Mercury enrichment in response to elevated atmospheric mercury concentrations in the organs of rape ( ) was investigated using an open top chamber fumigation experiment and a soil mercury enriched cultivation experiment. Results indicate that the mercury concentration in leaves and stems showed a significant variation under different concentrations of mercury in atmospheric and soil experiments while the concentration of mercury in roots, seeds and seed coats showed no significant variation under different atmospheric mercury concentrations. Using the function relation established by the experiment, results for atmospheric mercury sources in rape field biomass showed that atmospheric sources accounted for at least 81.81% of mercury in rape leaves and 32.29% of mercury in the stems. Therefore, mercury in the aboveground biomass predominantly derives from the absorption of atmospheric mercury.

Keywords： Open top chamber     Gaseous elemental mercury (GEM)     Soil Mercury     <em>Brassica napusem>    

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Mapping the structure-activity relationship of

Worawan PANPIPAT, Hasene KESKIN, Zheng GUO

Frontiers of Chemical Science and Engineering 2015, Volume 9, Issue 1,   Pages 105-113 doi: 10.1007/s11705-015-1502-x

Abstract: The phase behavior of twelve synthesized -sitosteryl fatty acid esters with acyl moieties with different chain lengths (C2:0-C18:0) and different degrees of unsaturation (C18:1-C18:3) were investigated in pure and mixed Langmuir monolayers with phospholipids. The surface-pressure isotherms showed that short chain -sitosteryl fatty acid esters gave smaller mean molecular areas and had decreased monolayer stability and the long chain steryl esters did not produce collapsed plateaus. All the steryl esters displayed strong condensing effects, but there was a pronounced structural dependency: medium chain esters (C8 and C10) were less efficient than short and long chain esters. Atomic force microscopy imaging demonstrated that monolayers mixed with dipalmitoyl phosphatidylcholine (DPPC) displayed both DPPC-rich and steryl lipid-rich domains. However, the height and area differences between the two phases and the roughness and morphologic patterns were very dependent on the steryl lipid concentrations as well as the length, the degree of unsaturation and the molecular conformations of the acyl segments. These findings not only provide a better understanding of the interactions between phytosteryl hydrophobic derivatives and biomembranes, but also may be of general use for the design and engineering of phytosterol structural derivations for specific food and pharmaceutical applications.

Keywords： <em>βem>-sitosteryl fatty acid esters     dipalmitoyl phosphatidylcholine     Langmuir monolayer     condensing    

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Promotion of transition metal oxides on the NH

Weiman Li, Haidi Liu, Yunfa Chen

Frontiers of Environmental Science & Engineering 2017, Volume 11, Issue 2, doi: 10.1007/s11783-017-0914-x

Abstract: Manganese and chromium oxides promote the NH -SCR activity of Zr-Ce mixed oxide. Cr-Zr-Ce mixed oxide exhibited>80% NO conversion at a wide temperature window. More acid sites and higher reducibility may responsible for the high SCR ability. Chromium oxide and manganese oxide promoted ZrO -CeO catalysts were prepared by a homogeneous precipitation method for the selective catalytic reduction of NO with NH . A series of characterization including X-ray diffraction (XRD), high-resolution transmission electron microscope (HR-TEM), Brunauer–Emmett–Teller (BET) surface area analysis, H temperature-programmed reduction (H -TPR), and X-ray photoelectron spectroscopy (XPS) were used to evaluate the influence of the physicochemical properties on NH -SCR activity. Cr-Zr-Ce and Mn-Zr-Ce catalysts are much more active than ZrO -CeO binary oxide for the low temperature NH -SCR, mainly because of the high specific surface area, more surface oxygen species, improved reducibility derived from synergistic effect among different elements. Mn-Zr-Ce catalyst exhibited high tolerance to SO and H O. Cr-Zr-Ce mixed oxide exhibited>80% NO conversion at a wide temperature window of 100°C–300°C. DRIFT studies showed that the addition of Cr is beneficial to the formation of Bronsted acid sites and prevents the formation of stable nitrate species because of the presence of Cr . The present mixed oxide can be a candidate for the low temperature abatement of NO .

Keywords： NH3-selective catalytic reduction     NO<em>xem>     Low temperature     Cr-Zr-Ce    

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Title Author Date Type Operation

Enhanced disinfection of <em>Escherichia coliem> and bacteriophage

Guiying RAO, Kristen S. BRASTAD, Qianyi ZHANG, Rebecca ROBINSON, Zhen HE, Ying LI

Journal Article

Flow cytometric assessment of the effects of chlorine, chloramine, and UV on bacteria by using nucleic acid stains and 5-cyano-2,3-ditolyltetrazolium chloride

Xuebiao Nie, Wenjun Liu, Mo Chen, Minmin Liu, Lu Ao

Journal Article

Serum <em>Nem>-Glycan Markers for Diagnosing Significant Liver Fibrosis and Cirrhosis in Chronic Hepatitis

Lin Wang, Yiqi Liu, Qixin Gu, Chi Zhang, Lei Xu, Lei Wang, Cuiying Chen, Xueen Liu, Hong Zhao, Hui Zhuang

Journal Article

Temporal and spatial stability of the EM/PM molecular subtypes in adult diffuse glioma

Journal Article

Profound Diversity of the <em>Nem>-Glycome from Microdissected Regions of Colorectal Cancer, Stroma

Di Wang, Katarina Madunić , Tao Zhang, Guinevere S.M. Lageveen-Kammeijer, Manfred Wuhrer

Journal Article

Detection of Escherichia coli in wastewater based on enzyme immunoassay

XI Haiyan, CAI Qiang, HE Miao, SHI Hanchang

Journal Article

italic>rpoS deficiency suppresses acetate accumulation in glucose-enriched culture of Escherichiacoli under an aerobic condition

Prayoga SURYADARMA, Yoshihiro OJIMA, Yuto FUKUDA, Naohiro AKAMATSU, Masahito TAYA

Journal Article

VITHM1 mediated green synthesis of silver nanoparticles: Mechanism and biological applications

Mani Abirami, Krishnan Kannabiran

Journal Article

Removable Dyes—The Missing Link for In-Depth <em>Nem>-Glycan Analysis via Multi-Method Approaches

Samanta Cajic, René Hennig, Valerian Grote, Udo Reichl, Erdmann Rapp

Journal Article

Novel Insight into the Etiology of Haff Disease by Mapping the <em>Nem>-Glycome with Orthogonal Mass

Si Liu, Yuanyuan Liu, Jiajing Lin, Bi-Feng Liu, Zhenyu He, Xiaomin Wu, Xin Liu

Journal Article

Isolation and application of predatory

Ran Yu, Shiwen Zhang, Zhoukai Chen, Chuanyang Li

Journal Article

High-Throughput Profiling of Serological Immunoglobulin G <em>Nem>-Glycome as a Noninvasive Biomarker

Pengcheng Liu, Xiaobing Wang, Aishe Dun, Yutong Li, Houqiang Li, Lu Wang, Yichun Zhang, Cancan Li, Jinxia Zhang, Xiaoyu Zhang, Lixing Ma, Haifeng Hou

Journal Article

Mercury enrichment in

Chunhao Dai, Pufeng Qin, Zhangwei Wang, Jian Chen, Xianshan Zhang, Si Luo

Journal Article

Mapping the structure-activity relationship of

Worawan PANPIPAT, Hasene KESKIN, Zheng GUO

Journal Article

Promotion of transition metal oxides on the NH

Weiman Li, Haidi Liu, Yunfa Chen

Journal Article