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Responses of bacterial strains isolated from drinking water environments to N-acyl-L-homoserine lactones

Zhuoying WU, Qing WANG, Feng GUO, Shenghua ZHANG, Qipei JIANG, Xin YU

Frontiers of Environmental Science & Engineering 2014, Volume 8, Issue 2,   Pages 205-214 doi: 10.1007/s11783-013-0492-5

Abstract: properties of the strains were investigated: bacterial biofilm formation capacity, QS signal molecule N-acyl-L-homoserinelactones (AHLs) production ability, and responses to AHLs and AHL analogs, 3-chloro-4-(dichloromethylFour AHLs were added to developed biofilms at dosages ranging from 0.1?nmol·L to 100 nmol·L .Further, the biofilm biomasses were closely associated with respective AHLs concentrations.Meanwhile, two AHLs analogs demonstrated unexpectedly minimal negative effects on biofilm formation.

Keywords： drinking water distribution systems (DWDS)     biofilm     quorum sensing (QS)     N-acyl-L-homoserine lactones (AHLs)     (dichloromethyl)-5-hydroxy-2(5H)-furanone (MX)     2(5H)-furanone    

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Effects of exogenous acylated homoserine lactones on biofilms in biofilters for gaseous toluene treatment

Frontiers of Environmental Science & Engineering 2023, Volume 17, Issue 2, doi: 10.1007/s11783-023-1617-0

Abstract:

● Biofilm formation was enhanced by exogenous AHLs.

Keywords： Quorum sensing     AHLs     Biofilter     Biofilm formation    

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Best operating conditions to produce hydroxyapatite nanoparticles by means of a spinning disc reactor

D’ Intino,B. de Caprariis,M.L. Santarelli,N. Verdone,A. Chianese

Frontiers of Chemical Science and Engineering 2014, Volume 8, Issue 2,   Pages 156-160 doi: 10.1007/s11705-014-1427-9

Abstract: In this work, Mg doped hydroxyapatite (Mg-HAP) nanoparticles were produced by a reaction-precipitation process by using a spinning disc reactor (SDR) at high rotational speed. The production process of these nanoparticles consisted of the neutralization reaction between two aqueous solutions of calcium chloride and ammonia orthophosphate at room temperature. By operating at pH= 10, a high purity Mg-HAP nanoparticles were obtained. In particular, they were 51 nm in average size when the two reagents were fed over the disc symmetrically at 3 cm from the disc center and a rotational speed of the disc reactor equal to 1400 r/min was adopted.

Keywords： hydroxyapatite     nanoparticles     spinning disc reactor    

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Antifungal and antibacterial functions of medicinal leech recombinant destabilase-lysozyme and its heated-up derivative

YUDINA, Danyang GUO, N. F. PISKUNKOVA, I. B. PAVLOVA, L. L. ZAVALOVA, I. P. BASKOVA

Frontiers of Chemical Science and Engineering 2012, Volume 6, Issue 2,   Pages 203-209 doi: 10.1007/s11705-012-1277-2

Abstract: Antifungal activity of recombinant medicinal leech destabilase-lysozyme (rec.Dest-Lys) was investigated by using fungi: , and , including yeasts and . Its antibacterial activity was investigated on gram-negative bacteria . These activities were assessed by radial agar diffusion assay, and scanning and transmission electron microscopy. Therefore, destabilase-lysozyme not only is endo-isopeptidase and lysozyme, but also has antifungal and antibacterial activities. Muramidase activity of rec.Dest-Lys disappeared after heat-treating at 90°C for 50 min without the loss of its antimicrobial activity. Furthermore we showed for the first time that the heated-up derivative of rec.Dest-Lys exhibited more potent activities against the above enumerated fungi and gram-negative bacteria than original protein.

Keywords： recombinant destabilase-lysozyme (rec.Dest-Lys)     antimicrobial activity     antifungal activity     medicinal leech     heated-up derivative of rec.Dest-Lys (T-rec.Dest-Lys)    

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Simultaneous harvesting and cell disruption of microalgae using ozone bubbles: optimization and characterization study for biodiesel production

Wan N. A. Kadir, Man K. Lam, Yoshimitsu Uemura, Jun W. Lim, Peck L. Kiew, Steven Lim, Siti S.Wong, Pau L. Show, Keat T. Lee

Frontiers of Chemical Science and Engineering 2021, Volume 15, Issue 5,   Pages 1257-1268 doi: 10.1007/s11705-020-2015-9

Abstract: At the optimum ozonation conditions (6.14 g·h ozone concentration, 30 min ozonation time, 1 L·min of

Keywords： microalgae     biodiesel     ozonation     pre-treatment     lipid    

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Kinematic calibration of precise 6-DOF stewart platform-type positioning systems for radio telescope applications

HERNáNDEZ, Marco CECCARELLI, Carlos LóPEZ-CAJúN, Alejandro GARCíA

Frontiers of Mechanical Engineering 2013, Volume 8, Issue 3,   Pages 252-260 doi: 10.1007/s11465-013-0249-7

Abstract:

The pose accuracy of a parallel robot is a function of the mobile platform posture. Thus, there is no a single value of the robot’s accuracy. In this paper, two novel methods for estimating the accuracy of parallel robots are presented. In the first method, the pose accuracy estimation is calculated by considering the propagation of each error, i.e., error variations are considered as a function of the actuator’s stroke. In the second method, it is considered that each actuator has a constant error at any stroke. Both methods can predict pose accuracy of precise robots at design stages, and/or can reduce calibration time of existing robots. An example of a six degree-of-freedom parallel manipulator is included to show the application of the proposed methods.

Keywords： pose errors     error estimation     parallel robot     radio telescopes    

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Association between heavy metals and antibiotic-resistant human pathogens in environmental reservoirs: A review

Nguyen, Cody N. Hugie, Molly L. Kile, Tala Navab-Daneshmand

Frontiers of Environmental Science & Engineering 2019, Volume 13, Issue 3, doi: 10.1007/s11783-019-1129-0

Abstract:

Heavy metals can act as co-selecting agents and promote antibiotic resistance.

Most frequent resistances to heavy metals are observed for zinc and cadmium.

P. aeruginosa and E. coli are commonly resistant to heavy metals and antibiotics.

Heavy metals proliferate antibiotic resistance through co- and cross-resistance.

Heavy metal and antibiotic resistances are common near anthropogenic activities.

Keywords： Zinc     Cadmium     Copper     Lead     E. coli     P. aeruginosa    

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Wide gap active brazing of ceramic-to-metal-joints for high temperature applications

Bobzin,L. Zhao,N. Kopp,S. Samadian Anavar

Frontiers of Mechanical Engineering 2014, Volume 9, Issue 1,   Pages 71-74 doi: 10.1007/s11465-014-0291-0

Abstract:

Applications like solid oxide fuel cells and sensors increasingly demand the possibility to braze ceramics to metals with a good resistance to high temperatures and oxidative atmospheres. Commonly used silver based active filler metals cannot fulfill these requirements, if application temperatures higher than 600°C occur. Au and Pd based active fillers are too expensive for many fields of use. As one possible solution nickel based active fillers were developed. Due to the high brazing temperatures and the low ductility of nickel based filler metals, the modification of standard nickel based filler metals were necessary to meet the requirements of above mentioned applications. To reduce thermally induced stresses wide brazing gaps and the addition of Al2O3 and WC particles to the filler metal were applied. In this study, the microstructure of the brazed joints and the thermo-chemical reactions between filler metal, active elements and WC particles were analyzed to understand the mechanism of the so called wide gap active brazing process. With regard to the behavior in typical application oxidation and thermal cycle tests were conducted as well as tensile tests.

Keywords： wide gap     active brazing     nickel filler metals     high temperature application     WC     Al2O3    

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Experimental evaluation and simulation of volumetric shrinkage and warpage on polymeric composite short natural fibers reinforced injection molded

GARZÓN,Luis M. LÓPEZ

Frontiers of Mechanical Engineering 2015, Volume 10, Issue 3,   Pages 287-293 doi: 10.1007/s11465-015-0346-x

Abstract:

A polymeric natural fiber-reinforced composite is developed by extrusion and injection molding process. The shrinkage and warpage of high-density polyethylene reinforced with short natural fibers of Guadua angustifolia Kunth are analyzed by experimental measurements and computer simulations. Autodesk Moldflow® and Solid Works® are employed to simulate both volumetric shrinkage and warpage of injected parts at different configurations: 0 wt.%, 20 wt.%, 30 wt.% and 40 wt.% reinforcing on shrinkage and warpage behavior of polymer composite. Become evident the restrictive effect of reinforcing on the volumetric shrinkage and warpage of injected parts. The results indicate that volumetric shrinkage of natural composite is reduced up to 58% with fiber increasing, whereas the warpage shows a reduction form 79% to 86% with major fiber content. These results suggest that it is a highly beneficial use of natural fibers to improve the assembly properties of polymeric natural fiber-reinforced composites.

Keywords： biocomposite     natural fiber     shrinkage     simulation     warpage    

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Seismic performance of composite moment-resisting frames achieved with sustainable CFST members

JIANG,L. MACEDO,J. M. CASTRO,R. MONTEIRO,N. SILVESTRE

Frontiers of Structural and Civil Engineering 2016, Volume 10, Issue 3,   Pages 312-332 doi: 10.1007/s11709-016-0345-y

Abstract: The main objective of the research presented in this paper is to study the bending behaviour of Concrete Filled Steel Tube (CFST) columns made with Rubberized Concrete (RuC), and to assess the seismic performance of moment-resisting frames with these structural members. The paper describes an experimental campaign where a total of 36 specimens were tested, resorting to a novel testing setup, aimed at reducing both the preparation time and cost of the test specimens. Different geometrical and material parameters were considered, namely cross-section type, cross-section slenderness, aggregate replacement ratio, axial load level and lateral loading type. The members were tested under both monotonic and cyclic lateral loading, with different levels of applied axial loading. The test results show that the bending behaviour of CFST elements is highly dependent on the steel tube properties and that the type of infill does not have a significant influence on the flexural behaviour of the member. It is also found that Eurocode 4 is conservative in predicting the flexural capacity of the tested specimens. Additionally, it was found that the seismic design of composite moment-resisting frames with CFST columns, according to Eurocode 8, not only leads to lighter design solutions but also to enhanced seismic performance in comparison to steel frames.

Keywords： concrete filled steel tubes     rubberized concrete     composite frames     seismic performance assessment    

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Synthesis of a cardanol-amine derivative using an ionic liquid catalyst

Trevisan, Roseane L. E. da Silva, Roselayne F. Furtado, Zengshe Liu, H. N. Cheng

Frontiers of Chemical Science and Engineering 2016, Volume 10, Issue 3,   Pages 425-431 doi: 10.1007/s11705-016-1581-3

Abstract: Cardanol is a biobased raw material derived from cashew nut shell liquid. In order to extend its utility, new derivatives and additional applications are useful. In this work cardanol was first epoxidized, and a novel aniline derivative prepared from it under mild reaction conditions with the help of an ionic liquid catalyst. The reaction chemistry was studied by using nuclear magnetic resonance. The resulting aminohydrin adduct showed antioxidant property and should also be a useful synthon for further reactions. As an example, the aminohydrin was shown to undergo a condensation reaction with formaldehyde to form a prepolymer, which could be further reacted to form thermosetting resins.

Keywords： cardanol     epoxidation     aminohydrin     aniline     ionic liquid     aniline-formaldehyde    

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Application of StrucGP in medical immunology: site-specific -glycoproteomic analysis of macrophages

Frontiers of Medicine 2023, Volume 17, Issue 2,   Pages 304-316 doi: 10.1007/s11684-022-0964-8

Abstract: The structure of N-glycans on specific proteins can regulate innate and adaptive immunity viaIn this work, we used THP-1-derived macrophages as examples to show the vast potential of a N-glycan structural interpretation tool StrucGP in N-glycoproteomic analysis.In addition, a high level of glycosylated PD-L1 was observed in M1 macrophages, and the LacNAc moietywas detected at Asn-192 and Asn-200 of PD-L1, and Asn-200 contained Lewis epitopes.

Keywords： macrophage     glycoproteome     glycopeptides     N-glycan structures     PD-L1    

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N

Hao Wang, Zhi-yuan Wang, Ben-dong Wang, Zhong-he Jin, John L. Crassidis,roger@zju.edu.cn

Frontiers of Information Technology & Electronic Engineering 2021, Volume 22, Issue 2,   Pages 141-286 doi: 10.1631/FITEE.1900358

Abstract: s are widely used in attitude-determination and control systems of satellites. The main deficiency of static s is the requirement of a small field of view (FOV). A typical FOV for a static is about 20° to 30°, which may not be sufficient for low-Earth-orbiting s. A novel compact with an FOV of nearly 180° is developed here. The Earth sensor comprises a panoramic annular lens (PAL) and an off-the-shelf camera with an uncooled complementary-metal-oxide-semiconductor (CMOS) infrared sensor. PAL is used to augment FOV so as to obtain a complete infrared image of the Earth from low-Earth-orbit. An algorithm is developed to compensate for the distortion caused by PAL and to calculate the vector of the Earth. The new is compact with low power consumption and high precision. Simulated images and on-orbit infrared images obtained via the ZDPS-2 are used to assess the performance of the new . Experiments show that the accuracy of the Earth sensor is about 0.032°.

Keywords： Infrared Earth sensor     Micro-satellite     Attitude determination system    

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ACSL5, a prognostic factor in acute myeloid leukemia, modulates the activity of Wnt/-catenin signaling by palmitoylation modification

Frontiers of Medicine 2023, Volume 17, Issue 4,   Pages 685-698 doi: 10.1007/s11684-022-0942-1

Abstract: Acyl-CoA synthetase long chain family member 5 (ACSL5), is a member of the acyl-CoA synthetases (ACSs) family that activates long chain fatty acids by catalyzing the synthesis of fatty acyl-CoAs.

Keywords： acute myeloid leukemia     acyl-CoA synthetase long chain family member 5     Wnt3a     palmitoylation     ABT-199    

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Comments on the special issue on forestry of

John L. INNES

Frontiers of Agricultural Science and Engineering 2017, Volume 4, Issue 4,   Pages 502-503 doi: 10.15302/J-FASE-2017189

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Title Author Date Type Operation

Responses of bacterial strains isolated from drinking water environments to N-acyl-L-homoserine lactones

Zhuoying WU, Qing WANG, Feng GUO, Shenghua ZHANG, Qipei JIANG, Xin YU

Journal Article

Effects of exogenous acylated homoserine lactones on biofilms in biofilters for gaseous toluene treatment

Journal Article

Best operating conditions to produce hydroxyapatite nanoparticles by means of a spinning disc reactor

D’ Intino,B. de Caprariis,M.L. Santarelli,N. Verdone,A. Chianese

Journal Article

Antifungal and antibacterial functions of medicinal leech recombinant destabilase-lysozyme and its heated-up derivative

YUDINA, Danyang GUO, N. F. PISKUNKOVA, I. B. PAVLOVA, L. L. ZAVALOVA, I. P. BASKOVA

Journal Article

Simultaneous harvesting and cell disruption of microalgae using ozone bubbles: optimization and characterization study for biodiesel production

Wan N. A. Kadir, Man K. Lam, Yoshimitsu Uemura, Jun W. Lim, Peck L. Kiew, Steven Lim, Siti S.Wong, Pau L. Show, Keat T. Lee

Journal Article

Kinematic calibration of precise 6-DOF stewart platform-type positioning systems for radio telescope applications

HERNáNDEZ, Marco CECCARELLI, Carlos LóPEZ-CAJúN, Alejandro GARCíA

Journal Article

Association between heavy metals and antibiotic-resistant human pathogens in environmental reservoirs: A review

Nguyen, Cody N. Hugie, Molly L. Kile, Tala Navab-Daneshmand

Journal Article

Wide gap active brazing of ceramic-to-metal-joints for high temperature applications

Bobzin,L. Zhao,N. Kopp,S. Samadian Anavar

Journal Article

Experimental evaluation and simulation of volumetric shrinkage and warpage on polymeric composite short natural fibers reinforced injection molded

GARZÓN,Luis M. LÓPEZ

Journal Article

Seismic performance of composite moment-resisting frames achieved with sustainable CFST members

JIANG,L. MACEDO,J. M. CASTRO,R. MONTEIRO,N. SILVESTRE

Journal Article

Synthesis of a cardanol-amine derivative using an ionic liquid catalyst

Trevisan, Roseane L. E. da Silva, Roselayne F. Furtado, Zengshe Liu, H. N. Cheng

Journal Article

Application of StrucGP in medical immunology: site-specific -glycoproteomic analysis of macrophages

Journal Article

N

Hao Wang, Zhi-yuan Wang, Ben-dong Wang, Zhong-he Jin, John L. Crassidis,roger@zju.edu.cn

Journal Article

ACSL5, a prognostic factor in acute myeloid leukemia, modulates the activity of Wnt/-catenin signaling by palmitoylation modification

Journal Article

Comments on the special issue on forestry of

John L. INNES

Journal Article