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Algae (

Xuesong Liu, Jianmin Wang

Frontiers of Environmental Science & Engineering 2020, Volume 14, Issue 6, doi: 10.1007/s11783-020-1276-3

Abstract: first examined the toxicity of MPs alone, and their effect on the toxicity of lead (Pb) on Ceriodaphnia dubia(C. dubia), a model aquatic organism for toxicity survey.Pb concentration and the intake of Pb-loaded MPs, both of which increased the accumulation of Pb in C.dubia.

Keywords： Microplastic     Lead     Toxicity     Algae     <i>C. dubiai>    

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Understanding the role of nano-TiO on the toxicity of Pb on through modeling–Is it additive or synergistic?

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 5, doi: 10.1007/s11783-021-1493-4

Abstract:

• A two-compartment model is able to quantify the effect of nano-TiO2 on Pb toxicity.

Keywords： Algae     <i>C. dubiai>     Lead     Nano-TiO2     Synergistic toxicity     Two-compartment toxicokinetic-toxicodynamic    

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Chemical poison and regeneration of SCR catalysts for NO<i>xi>

Junhua LI,Yue PENG,Huazhen CHANG,Xiang LI,John C. CRITTENDEN,Jiming HAO

Frontiers of Environmental Science & Engineering 2016, Volume 10, Issue 3,   Pages 413-427 doi: 10.1007/s11783-016-0832-3

Abstract: Selective catalytic reduction (SCR) of NO with NH is an effective technique to remove NO from stationary sources, such as coal-fired power plant and industrial boilers. Some of elements in the fly ash deactivate the catalyst due to strong chemisorptions on the active sites. The poisons may act by simply blocking active sites or alter the adsorption behaviors of reactants and products by an electronic interaction. This review is mainly focused on the chemical poisoning on V O -based catalysts, environmental-benign catalysts and low temperature catalysts. Several common poisons including alkali/alkaline earth metals, SO and heavy metals etc. are referred and their poisoning mechanisms on catalysts are discussed. The regeneration methods of poisoned catalysts and the development of poison-resistance catalysts are also compared and analyzed. Finally, future research directions in developing poisoning resistance catalysts and facile efficient regeneration methods for SCR catalysts are proposed.

Keywords： flue gas     DeNO<i>xi>     SCR catalyst     poison and regeneration    

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

Christine C. 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:

<i>P. aeruginosai> and <i>E. colii> are commonly

Keywords： Zinc     Cadmium     Copper     Lead     <i>E. colii>     <i>P. aeruginosai>    

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High <i>Sni>-2 Docosahexaenoic Acid Lipids for Brain Benefits, and Their Enzymatic Syntheses: A Review Review

Jun Jin, Qingzhe Jin, Xingguo Wang, Casimir C. Akoh

Engineering 2020, Volume 6, Issue 4,   Pages 424-431 doi: 10.1016/j.eng.2020.02.009

Abstract:

The normal development and maintenance of central neural functions are highly correlated with the amount of docosahexaenoic acid (DHA; ω-3 fatty acid) accumulated in the brain. DHA incorporated at the sn-2 position of lipids is well absorbed by intestinal mucosa and utilized efficiently in vivo. However, modern consumers have a reduced direct intake of DHA and increased intake of saturated fats or ω-6 fatty acid oils, resulting in behavioral and neurophysiological deficits. To provide an understanding of the integrated beneficial effects of DHA on the human brain, this review introduces the positional difference (sn-2 and sn-1,3 positions) of DHA on a glycerol skeleton in natural fats and oils, and further discusses the possible functional mechanism regarding DHA supplementation and the gut-brain axis. The multiple bidirectional routes in this axis offer a novel insight into the interaction between DHA supplementation, the gut microbiota, and brain health. To achieve high sn-2 DHA in diets, it is suggested that sn-2 DHA lipids be enzymatically produced in more efficient and economical ways by improving the specific activities of lipases and optimizing the purification procedures. These types of diets will benefit individuals with strong needs for sn-2 ω-3 lipids such as infants, children, and pregnant and lactating women.

Keywords： Docosahexaenoic acid， Sn-2 docosahexaenoic acid，Monoacylglycerol，Brain，Gut-brain axis，Structured lipid    

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Lipase-Catalyzed Synthesis of <i>Sni>-2 Palmitate: A Review Review

Wei Wei, Cong Sun, Xiaosan Wang, Qingzhe Jin, Xuebing Xu, Casimir C. Akoh, Xingguo Wang

Engineering 2020, Volume 6, Issue 4,   Pages 406-414 doi: 10.1016/j.eng.2020.02.008

Abstract:

Human milk fat (HMF) is an important source of nutrients and energy for infants. Triacylglycerols (TAGs) account for about 98% of HMF and have a unique molecular structure. HMF is highly enriched in palmitic acid (PA) at the sn-2 position of the glycerol backbone (more than 70%) and in unsaturated fatty acids at the sn-1,3 position. The specific TAG structure in HMF plays a valuable function in infant growth. Sn-2 palmitate (mainly 1,3-dioleoyl-2-palmitoyl-glycerol) is one of the structured TAGs that is commonly supplemented into infant formula in order to enable it to present a similar structure to HMF. In this review, the development of the lipase-catalyzed synthesis of sn-2 palmitate over the last 25 years are summarized, with a focus on reaction schemes in a laboratory setting. Particular attention is also paid to the commercialized sn-1,3 regioselective lipases that are used in structured TAGs synthesis, to general methods of TAG analysis, and to successfully developed sn-2 palmitate products on the market. Prospects for the lipase-catalyzed synthesis of sn-2 palmitate are discussed.

Keywords： Structured triacylglycerols，Palmitic acid，Human milk fat substitutes，Lipase-catalyzed reaction，<i>Sni> palmitate，Quantitative analysis    

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Assessment of oxidative and UV-C treatments for inactivating bacterial biofilms from groundwater wells

MURRAY,Erin I. Manitou-ALVAREZ,Enos C. INNISS,Frank G. HEALY,Adria A. BODOUR

Frontiers of Environmental Science & Engineering 2015, Volume 9, Issue 1,   Pages 39-49 doi: 10.1007/s11783-014-0699-0

Abstract: Ultraviolet-C (UV-C) and oxidative treatments including hydrogen peroxide (H O ), ozone (O ) and mixed

Keywords： well rehabilitation     aquifer     biofouling     hydrogen peroxide     sustainability    

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Non-thermal plasma for exhaust gases treatment

,Arturo COLÍN C.,Víctor SÁNCHEZ-MENDIETA,Ricardo VALDIVIA B.,Alfredo SANTANA D.,José HUERTAS C.

Frontiers of Mechanical Engineering 2015, Volume 10, Issue 3,   Pages 301-305 doi: 10.1007/s11465-015-0344-z

Abstract:

This article describes a study on a non-thermal plasma device to treat exhaust gases in an internal combustion engine. Several tests using a plasma device to treat exhaust gases are conducted on a Honda GX200-196 cm3 engine at different rotational speeds. A plasma reactor could be efficient in degrading nitrogen oxides and particulate matter. Monoxide and carbon dioxide treatment is minimal. However, achieving 1%–3% degradation may be interesting to reduce the emission of greenhouse gases.

Keywords： plasma treatment     NO<i>xi>     CO     CO2     particulate matter     vehicle    

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Dual enzyme activated fluorescein based fluorescent probe

Gardiner, Adam C. Sedgwick, Xiao-Peng He, Steven D. Bull, Tony D. James

Frontiers of Chemical Science and Engineering 2020, Volume 14, Issue 1,   Pages 117-121 doi: 10.1007/s11705-018-1785-9

Abstract: A simple dual analyte fluorescein-based probe ( ) was synthesised containing -glucosidase ( -glc) and hydrogen peroxide (H O ) trigger units. The presence of -glc, resulted in fragmentation of the parent molecule releasing glucose and the slightly fluorescent mono-boronate fluorescein ( ). Subsequently, in the presence of glucose oxidase (GOx), the released glucose was catalytically converted to D-glucono- -lactone, which produced H O as a by-product. The GOx-produced H O resulted in classic H O -mediated boronate oxidation and the release of the highly emissive fluorophore, fluorescein. This unique cascade reaction lead to an 80-fold increase in fluorescence intensity.

Keywords： chemosensors     dual-activation     GOx     fluorescence     <i>βi>-glucosidase     molecular logic    

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Tracking of safety hazards and real-time-prediction model of safety risks on construction sites

I. LAM,Li Qiming,Michael C. H. YAM,David A. S. CHEW

Strategic Study of CAE 2010, Volume 12, Issue 3,   Pages 68-72

Abstract:

This paper aims to explore the tracking approach of safety hazards and real-time-prediction methods of safety risks on construction sites. A literature review of safety issues on construction sites is first conducted. Consequently, a schematic model of tracking safety hazards and real-time prediction of safety risks is formulated and the corresponding methodologies are summarized. This study would provide a possible research approach on method for tracking safety hazards and real-time prediction of safety risks, while serving as a foundation for further study by drawing researchers' attention to the precursor signals of safety hazards on construction sites.

Keywords： construction sites     safety risks     real-time prediction     precursor signals     signal detection theory    

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Transcriptomic basis of neutrophil ratio variation induced by poly I:C stimulation in porcine peripheral

Haiyan WANG, Qiaoxia ZHANG, Lilin YIN, Xiangdong LIU, Shuhong ZHAO, Mengjin ZHU, Changchun LI

Frontiers of Agricultural Science and Engineering 2017, Volume 4, Issue 3,   Pages 342-352 doi: 10.15302/J-FASE-2017162

Abstract: Neutrophils are vital components of defense mechanisms against invading pathogens and are closely linked with the individual antiviral capacity of pigs and other mammals. Neutrophilia is a well-known clinical characteristic of viral and bacterial infections. Using Affymetrix porcine genome microarrays, we investigated the gene expression profiles associated with neutrophil variation in porcine peripheral blood before and after polyriboinosinic-polyribocytidylic acid stimulation. Transcriptomic analysis showed 796 differentially expressed genes (DEGs) in extreme response (ER) pigs and 192 DEGs in moderate response (MR) pigs. Most DEGs were related to immune responses, included , , , , , , , and . Gene ontology analysis indicated that the DEGs of both ER and MR pigs were involved in common biological processes, such as cell proliferation, growth regulation, immune response, inflammatory response and cell activation. The ER and MR groups also showed differences in DEGs involved in biological processes. DEGs involved in cell division and cell cycle were specifically found in the ER pigs, whereas DEGs involved in cell migration were specifically found in the MR pigs. The study provides a basic understanding of the molecular basis for the antiviral capacity of pigs and other mammals.

Keywords： neutrophil     peripheral blood     pig     poly I:C     transcriptome    

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Development of an H reduction and moderate oxidation method for 3,5-dimethylpyridine hydrogenation in trickle bed reactor

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 12,   Pages 1807-1817 doi: 10.1007/s11705-022-2243-2

Abstract: i> reduced Ru/C-n catalyst was higher than that of the <i>in-situi> reduced Ru/C-y catalyst.the highest 3,5-dimethylpyridine conversion was obtained for the Ru/C-i1 catalyst prepared by <i>in-situi> H2 reduction and moderate oxidation (oxidized at 100 °C).Excessive oxidation (200 °C) resulted in a significant decrease in the Ru/RuO<i>xi> ratioof the <i>in-situi> H2 reduction and moderate oxidized Ru/C-i2 catalyst, the interaction

Keywords： Ru/C catalyst     <i>in-situi> H2 reduction and moderate oxidation     <i>in-situi> reduction     non-<i>in-situi> reduction     hydrogenation of 3     5-dimethylpyridine    

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Atomistic simulations of plasma catalytic processes

Erik C. Neyts

Frontiers of Chemical Science and Engineering 2018, Volume 12, Issue 1,   Pages 145-154 doi: 10.1007/s11705-017-1674-7

Abstract: There is currently a growing interest in the realisation and optimization of hybrid plasma/catalyst systems for a multitude of applications, ranging from nanotechnology to environmental chemistry. In spite of this interest, there is, however, a lack in fundamental understanding of the underlying processes in such systems. While a lot of experimental research is already being carried out to gain this understanding, only recently the first simulations have appeared in the literature. In this contribution, an overview is presented on atomic scale simulations of plasma catalytic processes as carried out in our group. In particular, this contribution focusses on plasma-assisted catalyzed carbon nanostructure growth, and plasma catalysis for greenhouse gas conversion. Attention is paid to what can routinely be done, and where challenges persist.

Keywords： atomic scale simulation     plasma-catalyst    

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Recent advances in special morphologic photocatalysts for NO removal

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 11, doi: 10.1007/s11783-022-1573-0

Abstract: List>

● Systematic information of recent progress in photocatalytic NO <i>x i> removal is provided.

Keywords： NO<i>xi> removal     Photocatalyst     Graphene     C3N4     Bi-based compounds    

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A simple, azulene-based colorimetric probe for the detection of nitrite in water

Lloyd C. Murfin, Carlos M. López-Alled, Adam C. Sedgwick, Jannis Wenk, Tony D. James, Simon E. Lewis

Frontiers of Chemical Science and Engineering 2020, Volume 14, Issue 1,   Pages 90-96 doi: 10.1007/s11705-019-1790-7

Abstract: We describe the synthesis and evaluation of an azulene-based chemodosimeter for nitrite. The probe was found to undergo two distinct color changes upon introduction aqueous nitrite ion. A near-instant formation of a grey color provides a qualitative indication of the presence of nitrite, followed by the formation of a deep-yellow/orange color, the endpoint from which quantitative data can be derived. The azulene probe exhibits 1:1 stoichiometry of reaction with nitrite in water, and is selective for nitrite over other anions. The azulene probe was applied to determine nitrite content in cured meat, and compared with the British Standard testing procedure (Griess test). The value obtained from the azulene-based probe agreed closely with the standard test. Our procedure only requires the preparation of one standard solution, instead of the three required for the standard Griess test.

Keywords： azulene     nitrite     diazoquinone    

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Title Author Date Type Operation

Algae (

Xuesong Liu, Jianmin Wang

Journal Article

Understanding the role of nano-TiO on the toxicity of Pb on through modeling–Is it additive or synergistic?

Journal Article

Chemical poison and regeneration of SCR catalysts for NO<i>xi>

Junhua LI,Yue PENG,Huazhen CHANG,Xiang LI,John C. CRITTENDEN,Jiming HAO

Journal Article

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

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

Journal Article

High <i>Sni>-2 Docosahexaenoic Acid Lipids for Brain Benefits, and Their Enzymatic Syntheses: A Review

Jun Jin, Qingzhe Jin, Xingguo Wang, Casimir C. Akoh

Journal Article

Lipase-Catalyzed Synthesis of <i>Sni>-2 Palmitate: A Review

Wei Wei, Cong Sun, Xiaosan Wang, Qingzhe Jin, Xuebing Xu, Casimir C. Akoh, Xingguo Wang

Journal Article

Assessment of oxidative and UV-C treatments for inactivating bacterial biofilms from groundwater wells

MURRAY,Erin I. Manitou-ALVAREZ,Enos C. INNISS,Frank G. HEALY,Adria A. BODOUR

Journal Article

Non-thermal plasma for exhaust gases treatment

,Arturo COLÍN C.,Víctor SÁNCHEZ-MENDIETA,Ricardo VALDIVIA B.,Alfredo SANTANA D.,José HUERTAS C.

Journal Article

Dual enzyme activated fluorescein based fluorescent probe

Gardiner, Adam C. Sedgwick, Xiao-Peng He, Steven D. Bull, Tony D. James

Journal Article

Tracking of safety hazards and real-time-prediction model of safety risks on construction sites

I. LAM,Li Qiming,Michael C. H. YAM,David A. S. CHEW

Journal Article

Transcriptomic basis of neutrophil ratio variation induced by poly I:C stimulation in porcine peripheral

Haiyan WANG, Qiaoxia ZHANG, Lilin YIN, Xiangdong LIU, Shuhong ZHAO, Mengjin ZHU, Changchun LI

Journal Article

Development of an H reduction and moderate oxidation method for 3,5-dimethylpyridine hydrogenation in trickle bed reactor

Journal Article

Atomistic simulations of plasma catalytic processes

Erik C. Neyts

Journal Article

Recent advances in special morphologic photocatalysts for NO removal

Journal Article

A simple, azulene-based colorimetric probe for the detection of nitrite in water

Lloyd C. Murfin, Carlos M. López-Alled, Adam C. Sedgwick, Jannis Wenk, Tony D. James, Simon E. Lewis

Journal Article