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Statistical modeling and optimization for enhanced hyaluronic acid production by batch culture of Sreptococcus zooepidemicus via the supplement of uracil

Long LIU, Haiquan YANG, Guocheng DU, Miao WANG, Jian CHEN,

Frontiers of Chemical Science and Engineering 2009, Volume 3, Issue 4,   Pages 351-356 doi: 10.1007/s11705-009-0248-8

Abstract: This work is aimed to achieve the optimal hyaluronic acid (HA) production by batch culture of via theFirst, the influence of nucleotide bases (adenine, guanine, cytosine, thymine, and uracil) on microbialHA production was investigated using fractional factorial design (FFD).By a 2 FFD, uracil was found to be the most significant factor for cell growth and HA production, whilethe other nucleotide bases were shown to have no significant effects on cell growth and HA production

Keywords： control     microbial HA     thymine     influence     culture    

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A thermodynamic study of the removal of HCl and H

Joseph LEE, Bo FENG

Frontiers of Chemical Science and Engineering 2012, Volume 6, Issue 1,   Pages 67-83 doi: 10.1007/s11705-011-1162-4

Abstract: Advanced integrated-gasification combined-cycle (IGCC) and integrated-gasification fuel cell (IFGC) systems require high-temperature sorbents that are capable of removing hydrogen chloride and hydrogen sulfide from coal derived gases to very low levels. HCl and H S are highly reactive, corrosive, and toxic gases that must be removed to meet stringent environmental regulations, to protect power generation equipment and to control the emissions of contaminants. The thermodynamic behavior of 13 sorbents for the removal of HCl and H S under various conditions including: initial toxic gas concentration (1–10000 ppm), operating pressure (0.1–11 Mpa), temperature (300 K–1500 K), and the presence of H O were investigated. The correlation between HCl and H S was also examined. Thermodynamic calculations were carried out for the reactions of the 13 sorbents using a FactSage 5.2 software package based on free energy minimization. The sorbents, Na CO , NaHCO , K CO , and CaO are capable of completely removing chlorine at high temperatures (up to ~1240 K) and at high pressures. Water vapor did not have any significant effects on the dechlorination capability of the sorbents. Nine of the sorbents namely; Cu O, Na CO , NaHCO , K CO , CaO, ZnO, MnO, FeO, and PbO, were determined to have great potential as desulfurization sorbents. Cu O and ZnO had the best performance in terms of the optimum operating temperature. The addition of water vapor to the reactant gas produces a slightly detrimental effect on most of the sorbents, but FeO exhibited the worst performance with a reduction in the maximum operating temperature of about 428 K. The dechlorination performance of the alkali sorbents was not affected by the presence of H S in the reactions. However, the desulfurization capability of some sorbents was greatly affected by the presence of HCl. Particularly, the performance of Cu O was significantly reduced when HCl was present, but the performance of FeO improved remarkably. The thermodynamic results gathered are valuable for the developments of better sorbents.

Keywords： syngas cleaning     sorbent     desulfurization     dechlorination    

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Responses of microbial interactions to elevated salinity in activated sludge microbial community

Frontiers of Environmental Science & Engineering 2023, Volume 17, Issue 5, doi: 10.1007/s11783-023-1660-x

Abstract:

● Salinity led to the elevation of NAR over 99.72%.

Keywords： Elevated salinity     Activated sludge system     Pollution removal     Microbial interactions     Competitive relationship    

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Histogram equalization using a reduced feature set of background speakers’ utterances for speaker recognition Article

Myung-jae KIM, Il-ho YANG, Min-seok KIM, Ha-jin YU

Frontiers of Information Technology & Electronic Engineering 2017, Volume 18, Issue 5,   Pages 738-750 doi: 10.1631/FITEE.1500380

Abstract: We propose a method for histogram equalization using supplement sets to improve the performance of speaker recognition when the training and test utterances are very short. The supplement sets are derived using outputs of selection or clustering algorithms from the background speakers’ utterances. The proposed approach is used as a feature normalization method for building histograms when there are insufficient input utterance samples. In addition, the proposed method is used as an i-vector normalization method in an i-vector-based probabilistic linear discriminant analysis (PLDA) system, which is the current state-of-the-art for speaker verification. The ranks of sample values for histogram equalization are estimated in ascending order from both the input utterances and the supplement set. New ranks are obtained by computing the sum of different kinds of ranks. Subsequently, the proposed method determines the cumulative distribution function of the test utterance using the newly defined ranks. The proposed method is compared with conventional feature normalization methods, such as cepstral mean normalization (CMN), cepstral mean and variance normalization (MVN), histogram equalization (HEQ), and the European Telecommunications Standards Institute (ETSI) advanced front-end methods. In addition, performance is compared for a case in which the greedy selection algorithm is used with fuzzy -means and -means algorithms. The YOHO and Electronics and Telecommunications Research Institute (ETRI) databases are used in an evaluation in the feature space. The test sets are simulated by the Opus VoIP codec. We also use the 2008 National Institute of Standards and Technology (NIST) speaker recognition evaluation (SRE) corpus for the i-vector system. The results of the experimental evaluation demonstrate that the average system performance is improved when the proposed method is used, compared to the conventional feature normalization methods.

Keywords： Speaker recognition     Histogram equalization     i-vector    

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Using pyrosequencing and quantitative PCR to analyze microbial communities

Husen ZHANG

Frontiers of Environmental Science & Engineering 2011, Volume 5, Issue 1,   Pages 21-27 doi: 10.1007/s11783-011-0303-9

Abstract: New high-throughput technologies continue to emerge for studying complex microbial communities.In this review, the principles of these two methods and their complementary applications in studying microbialThree examples in which pyrosequencing and QPCR were used together to define and quantify members of microbialwhose sludge was made more bioavailable by a high-voltage pretreatment, and on the biofilm anode of a microbial

Keywords： polymerase chain reaction (PCR)     microbial communities     pyrosequencing     gut     microbial fuel cell     sludge    

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LINKING CROP WATER PRODUCTIVITY TO SOIL PHYSICAL, CHEMICAL AND MICROBIAL PROPERTIES

Frontiers of Agricultural Science and Engineering 2021, Volume 8, Issue 4,   Pages 545-558 doi: 10.15302/J-FASE -2020349

Abstract: This review examines the effects of soil physical, chemical, and microbial properties on crop water productivity

Keywords： crop water productivity     crop yield     soil chemical properties     soil microbial properties     soil physical    

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thermophilic anaerobic digestion of swine manure with sulfamethoxazole and norfloxacin: Dynamics of microbial

Frontiers of Environmental Science & Engineering 2021, Volume 15, Issue 5, doi: 10.1007/s11783-020-1342-x

Abstract:

• SMX addition had negative effect on acetoclastic methanogens in mesophilic AD.

Keywords： Pig manure     Antibiotics     Anaerobic digestion     Resistance genes     Microbial community    

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porphyrinic triazine-based frameworks with excellent biocompatibility for conversion of CO in H-mediated microbial

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 12,   Pages 1761-1771 doi: 10.1007/s11705-022-2195-6

Abstract: Microbial electrosynthesis is a promising alternative to directly convert CO2 into long-chainFinally, the microbial electrosynthesis system equipped with the electrocatalyst successfully convertedThis work drew up a novel strategy for enhancing the biocompatibility of electrocatalysts in microbial

Keywords： microbial electrosynthesis     hydrogen evolution reaction     metalloporphyrins     biocompatibility     CO    

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Microbial electrolysis cells with biocathodes and driven by microbial fuel cells for simultaneous enhanced

Jingya SHEN,Yuliang SUN,Liping HUANG,Jinhui YANG

Frontiers of Environmental Science & Engineering 2015, Volume 9, Issue 6,   Pages 1084-1095 doi: 10.1007/s11783-015-0805-y

Abstract: Previous tests have primarily examined Cu(II) and Co(II) removal in microbial electrolysis cells (MECs) with abiotic cathodes and driven by microbial fuel cell (MFCs).

Keywords： biocathode     microbial electrolysis cell     microbial fuel cell     Cu(II) removal     Co(II) removal    

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Current molecular biologic techniques for characterizing environmental microbial community

Dawen GAO, Yu TAO

Frontiers of Environmental Science & Engineering 2012, Volume 6, Issue 1,   Pages 82-97 doi: 10.1007/s11783-011-0306-6

Abstract: engineering more than a century ago, researchers desire for more and more information concerning the microbialFor the past 30 years, molecular biologic techniques explored for environmental microbial community (

Keywords： molecular biological technique     microbial community     denaturing gradient gel electrophoresis (DGGE)     terminal    

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Electrochemical oxidation of humic acid at the antimony- and nickel-doped tin oxide electrode

TANG Chengli,YAN Wei,ZHENG Chunli

Frontiers of Environmental Science & Engineering 2014, Volume 8, Issue 3,   Pages 337-344 doi: 10.1007/s11783-013-0545-9

Abstract: This work investigated the degradation of humic acid (HA) in aqueous solution by electrochemical oxidationInitial concentrations of HA ranged from 3 to 9 mg·L .Under such a concentration scope, the degradation of HA was a mass transfer controlled process.Degradation rate increased with the increase of HA initial concentration.Alkaly (pH= 12) and neutral (pH= 7) conditions were benefical to HA degradation.

Keywords： electrochemical oxidation     humic acid (HA)     natural water     Ni-Sb-SnO2/Ti electrode    

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Comparison of the removal of monovalent and divalent cations in the microbial desalination cell

Shanshan CHEN,Haiping LUO,Yanping HOU,Guangli LIU,Renduo ZHANG,Bangyu QIN

Frontiers of Environmental Science & Engineering 2015, Volume 9, Issue 2,   Pages 317-323 doi: 10.1007/s11783-013-0596-y

Abstract: Microbial desalination cell (MDC) is a promising technology to desalinate water and generate electrical

Keywords： divalent ion     electrodialysis     ion characteristic     microbial desalination cell     monovalent ion    

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Salmonella-Delivered COBRA-HA1 Antigen Derived from H1N1 Hemagglutinin Sequences Elicits Broad-Spectrum Article

Ram Prasad Aganja, Amal Senevirathne, Chandran Sivasankar, John Hwa Lee

Engineering 2024, Volume 32, Issue 1,   Pages 42-57 doi: 10.1016/j.eng.2023.08.001

Abstract: antigen (COBRA) was used to generate a consensus sequence of the hemagglutinin globular head portion (HA1Constructs carrying different HA1 regions were delivered into eukaryotic cells by Salmonelladiscovery revolutionizes influenza vaccine design and delivery; Salmonella-mediated COBRA-HA1

Keywords： COBRA     Influenza A     Salmonella     Vaccine     Broad spectral protection    

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Water-dispersible nano-pollutions reshape microbial metabolism in type-specific manners: A metabolic

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 9, doi: 10.1007/s11783-022-1548-1

Abstract:

• Water-dispersible nano-pollutions exhibit type-specific toxic effects on E. coli.

Keywords： Nano-toxicity     Nano-plastics     Quantum dots     Microbial metabolite     Metabolic dysregulation    

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Repeated batch fermentation with water recycling and cell separation for microbial lipid production

Yumei WANG, Wei LIU, Jie BAO

Frontiers of Chemical Science and Engineering 2012, Volume 6, Issue 4,   Pages 453-460 doi: 10.1007/s11705-012-1210-8

Abstract: Large waste water disposal was the major problem in microbial lipid fermentation because of low yieldOur method provided a practical option for reducing the waste water generated from microbial lipid fermentation

Keywords： batch fermentation     microbial lipid     Trichosporon cutaneum CX1     flocculation     waste water    

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Title Author Date Type Operation

Statistical modeling and optimization for enhanced hyaluronic acid production by batch culture of Sreptococcus zooepidemicus via the supplement of uracil

Long LIU, Haiquan YANG, Guocheng DU, Miao WANG, Jian CHEN,

Journal Article

A thermodynamic study of the removal of HCl and H

Joseph LEE, Bo FENG

Journal Article

Responses of microbial interactions to elevated salinity in activated sludge microbial community

Journal Article

Histogram equalization using a reduced feature set of background speakers’ utterances for speaker recognition

Myung-jae KIM, Il-ho YANG, Min-seok KIM, Ha-jin YU

Journal Article

Using pyrosequencing and quantitative PCR to analyze microbial communities

Husen ZHANG

Journal Article

LINKING CROP WATER PRODUCTIVITY TO SOIL PHYSICAL, CHEMICAL AND MICROBIAL PROPERTIES

Journal Article

thermophilic anaerobic digestion of swine manure with sulfamethoxazole and norfloxacin: Dynamics of microbial

Journal Article

porphyrinic triazine-based frameworks with excellent biocompatibility for conversion of CO in H-mediated microbial

Journal Article

Microbial electrolysis cells with biocathodes and driven by microbial fuel cells for simultaneous enhanced

Jingya SHEN,Yuliang SUN,Liping HUANG,Jinhui YANG

Journal Article

Current molecular biologic techniques for characterizing environmental microbial community

Dawen GAO, Yu TAO

Journal Article

Electrochemical oxidation of humic acid at the antimony- and nickel-doped tin oxide electrode

TANG Chengli,YAN Wei,ZHENG Chunli

Journal Article

Comparison of the removal of monovalent and divalent cations in the microbial desalination cell

Shanshan CHEN,Haiping LUO,Yanping HOU,Guangli LIU,Renduo ZHANG,Bangyu QIN

Journal Article

Salmonella-Delivered COBRA-HA1 Antigen Derived from H1N1 Hemagglutinin Sequences Elicits Broad-Spectrum

Ram Prasad Aganja, Amal Senevirathne, Chandran Sivasankar, John Hwa Lee

Journal Article

Water-dispersible nano-pollutions reshape microbial metabolism in type-specific manners: A metabolic

Journal Article

Repeated batch fermentation with water recycling and cell separation for microbial lipid production

Yumei WANG, Wei LIU, Jie BAO

Journal Article