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biosorption 4

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Biosorption of mercury and lead by aqueous

Pratibha SANJENBAM, Kumar SAURAV, Krishnan KANNABIRAN

Frontiers of Chemical Science and Engineering 2012, Volume 6, Issue 2,   Pages 198-202 doi: 10.1007/s11705-012-1285-2

Abstract: The maximum tolerance concentration (MTC) of sp. was determined by a well diffusion method and a brothphylogenetic analysis, the strain was classified as a new species of the genus and designated as VITSVK9sp.A blast search of the 16S rDNA sequence of the strain showed the most similarity (95%) with sp.

Keywords： mercury     lead     biosorption     maximum tolerance concentration     <italic>Streptomycesitalic> VITSVK9 sp.    

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Application of statistical design for the production of inulinase by

M. DILIPKUMAR, M. RAJASIMMAN, N. RAJAMOHAN

Frontiers of Chemical Science and Engineering 2011, Volume 5, Issue 4,   Pages 463-470 doi: 10.1007/s11705-011-1112-1

Abstract: Plackett-Burman design was employed for screening 18 nutrient components for the production of inulinase using sp.

Keywords： inulinase     pressmud     Response Surface Methodology (RSM)     <italic>streptomycesitalic> sp    

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In situ enhanced bioremediation of dichlorvos by a phyllosphere

Jiying NING, Gang GANG, Zhihui BAI, Qing HU, Hongyan QI, Anzhou MA, Xuliang ZHUAN, Guoqiang ZHUANG

Frontiers of Environmental Science & Engineering 2012, Volume 6, Issue 2,   Pages 231-237 doi: 10.1007/s11783-011-0316-4

Abstract: The strain was identified as sp., based on its phenotypic features and 16S rRNA gene sequence.

Keywords： enhanced bioremediation     organophosphorus pesticides     phyllosphere     <italic>Flavobacteriumitalic> sp.    

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Carbon dioxide fixation by

Xuan JIA, Hai YAN, Zijing WANG, Huanju HE, Qianqian XU, Haiou WANG, Chunhua YIN, Liqin LIU

Frontiers of Environmental Science & Engineering 2011, Volume 5, Issue 3,   Pages 402-408 doi: 10.1007/s11783-010-0223-0

Abstract: carbon under lighting and heterotrophically on organic carbon without lighting, was identified as sp.In the heterotrophic batch culture, more than 20.0 g·L of cell dry weight concentration (DWC) of sp.A novel fermentor-helical combined photobioreactor was established and used to cultivate sp.It showed that the autotrophic growth of sp.The highest CO fixation of 95% appeared on day 1 in the exponential growth phases of sp.

Keywords： <italic>Chlorellaitalic> sp. USTB-01     carbon dioxide fixation     combined photobioreactor    

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Mutagenesis and selective breeding of a high producing

Tian WANG, Shiru JIA, Zhilei TAN, Yujie DAI, Shuai SONG, Guoliang WANG

Frontiers of Chemical Science and Engineering 2012, Volume 6, Issue 2,   Pages 179-183 doi: 10.1007/s11705-012-1273-6

Abstract: Finally, one -PL-producing strain, L9, was selected.

Keywords： <italic>?italic>-poly-<italic>Litalic>-lysine     plasma     AHV     <italic>Streptomyces diastatochromogenesitalic>    

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EXTRACTION AND EVALUATION OF EDIBLE OIL FROM SCHIZOCHYTRIUM SP. USING AN AQUEOUS ENZYMATIC METHOD

Frontiers of Agricultural Science and Engineering 2021, Volume 8, Issue 4,   Pages 623-634 doi: 10.15302/J-FASE -2021400

Abstract:

Schizochytrium sp., a marine microalga, is a potential source of edible oil due to itsAn approach to isolate edible microalgal oil from Schizochytrium sp. using aqueous enzymaticindicate a potential application of AEE for extraction of oil from Schizochytrium sp.

Keywords： antioxidant activity / aqueous enzymatic extraction / edible microalgal oil / fatty acid composition / physicochemical properties    

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Microcystin-LR biodegradation by

Chengbin XIAO, Hai YAN, Junfeng WANG, Wei WEI, Jun NING, Gang PAN

Frontiers of Environmental Science & Engineering 2011, Volume 5, Issue 4,   Pages 526-532 doi: 10.1007/s11783-010-0261-7

Abstract: The strain was identified as sp.USTB-05, which was the first isolated MCs-biodegrading sp. in China.The average biodegradation rate of MC-LR by sp.results indicated that MC-LR with the initial concentration of 4.0 mg·L in water was biodegraded by sp.while MC-LR with the initial concentration of 28.8 mg·L could be completely removed in 3 h by CE of sp.

Keywords： microcystin-LR(MC-LR)     biodegradation     <italic>Sphingopyxisitalic> sp     USTB-05     cell-free extract    

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The <italic>rpoSitalic> deficiency suppresses acetate accumulation in glucose-enriched culture of <italic>Escherichia coliitalic> 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： <italic>Escherichia coliitalic>     <italic>rpoSitalic>     aerobic and glucose-enriched culture     overflow    

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Nitrogen distribution in the products from the hydrothermal liquefaction of sp. and sp.

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 6,   Pages 985-995 doi: 10.1007/s11705-021-2126-y

Abstract: In the project, Chlorella sp. and Spirulina sp. were selected as raw materials to investigateFor example, nitrogen in basic amino acids of Spirulina sp. preferred to go into the aqueous phasecomparing with the nitrogen in neutral amino acids of Chlorella sp.

Keywords： microalgae     hydrothermal liquefaction     biocrude     nitrogen distribution    

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Effect of pH on biologic degradation of

Hongjing LI, Mengli HAO, Jingxian LIU, Chen CHEN, Zhengqiu FAN, Xiangrong WANG

Frontiers of Environmental Science & Engineering 2012, Volume 6, Issue 2,   Pages 224-230 doi: 10.1007/s11783-011-0314-6

Abstract: showed that the dominant alga-lysing bacteria in the SBBRs was strain HM-01, which was identified as sp.

Keywords： pH     biological degradation     alga-lysing bacteria     sequencing batch biofilm reactor (SBBR)     16S rRNA     <italic>Bacillusitalic> sp    

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Synthesis of depsipeptides from

Hongfei CAO, Yakai FENG, Heyun WANG, Li ZHANG, Musammir KHAN, Jintang GUO

Frontiers of Chemical Science and Engineering 2011, Volume 5, Issue 4,   Pages 409-415 doi: 10.1007/s11705-011-1141-9

Abstract: By using the corresponding -amino acid sodium as initiator, -caprolactone-depsipeptides CL-Ala and CL-Leu were prepared by the reactions of -caprolactone (CL) with -alanine and -leucine, respectively, and -dioxanone-depsipeptide (PDO-Leu) was prepared by the reaction of -dioxanone (PDO) with -leucine. Two poly( -caprolactone) oligomers (PCL-Ala and PCL-Leu) of different molecular weights with depsipeptide unit were synthesized by controlling the feed ratio of -amino acid sodium and CL. The presence of the depsipeptide structure in these obtained products was confirmed by H NMR spectra and the molecular weight of the poly( -caprolactone) oligomers was measured by gel permeation chromatography (GPC). These products contain a hydroxyl group and a carboxyl group in one molecule, which means they could act as bifunctional monomers for further polymerization to prepare high molecular weight polymers. By this way, the depsipeptide unit could be introduced into the polymers and the biodegradation rates of the novel polymers could be well controlled in vivo by the tailored molecular structures.

Keywords： <italic>?italic>-caprolactone     <italic>pitalic>-dioxanone     <italic>Litalic>-alanine     <italic>Litalic>-leucine    

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Assessment of toxicity of two nitroaromatic compounds in the freshwater fish

Hongyan SHEN, Jixi GAO, Jinsheng WANG

Frontiers of Environmental Science & Engineering 2012, Volume 6, Issue 4,   Pages 518-523 doi: 10.1007/s11783-012-0427-6

Abstract: This study was conducted to evaluate the toxicological response of -nitrotoluene and -nitroaniline to the key fish species, . A freshwater fish bioassay based on the 96 h was used to estimate the single and joint toxicity of the two chemicals. The toxicity of -nitrotoluene was greater than that of -nitroaniline based on 96 h values of 40.74 mg·L and 48.99 mg·L , respectively. Both compounds had moderate toxicity toward , and this toxicity increased with the exposure duration and concentration. Binary mixtures of the compounds were more toxic than the individual compounds at 96 h, and they acted upon partial addition. When the exposure time was longer, the toxicity increased for mixtures of compounds with the same concentration or toxicity. The results of this study suggest that exposure to a combination of these chemicals would result in a higher environmental risk in aquatic systems than exposure to either compound alone. Further research is needed to investigate the combined effects and sublethal toxicity of -nitrotoluene and -nitroaniline, since they are both still used in China.

Keywords： joint toxicity     <italic>Cyprinus carpioitalic>     <italic>LCitalic>50     <italic>pitalic>-nitrotoluene     <italic>pitalic>-nitroaniline     toxic unit    

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Investigations on color variations of <italic>Morpho rhetenoritalic> butterfly wing scales

Guanglan LIAO, Haibo ZUO, Xuan JIANG, Xuefeng YANG, Tielin SHI

Frontiers of Mechanical Engineering 2012, Volume 7, Issue 4,   Pages 394-400 doi: 10.1007/s11465-012-0347-y

Abstract:

Experiments and simulations are carried out to investigate the optical properties of butterfly wing scales. The upper surface of a male butterfly wing presents a single-layer of scales, the microstructures of which are responsible for the brilliant blue color. The color varies from cyan blue to yellow green and soon afterwards returns back to cyan blue when some ethanol is dropped on the upper surface. At the start of the ethanol volatilization process, the reflection spectrum remains stable. As the ethanol further volatilizes, the peak reflectance decreases slightly, then increases dramatically. Meanwhile, the peak wavelength keeps approximately constant, then decreases, and keeps almost stable at the end of the process. Therefore, the optical properties depend strongly on the varying ambient conditions, including the refractive index and the thickness of the packing medium. Moreover, the possible causes for the scales in dark green region after several dropping ethanol experiments are clarified. This research benefits our understanding of the color variation mechanisms of the wing scales, and provides inspiration for further studies and applications.

Keywords： <italic>Morpho rhetenoritalic>     microstructures     color variations     ambient medium    

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Administration with

Qi RUI, Qin LU, Dayong WANG

Frontiers of Medicine 2009, Volume 3, Issue 1,   Pages 76-90 doi: 10.1007/s11684-009-0002-0

Abstract: During normal metabolism, oxidative byproducts will inevitably generate and damage molecules thereby impairing their biological functions, including the aging process. (补肾抗衰方, ) is a traditional Chinese medicine widely used for clinically treating premature ovarian failure. In the present study, administration at high concentrations significantly increased lifespan, slowed aging-related decline, and delayed accumulation of aging-related cellular damage in wild-type . administration could further largely alleviate the aging defects induced by UV and oxidative stresses, and administration at different concentrations could largely rescue the aging defects in mutant animals. The protective effects of administration on aging process were at least partially dependent on the Ins/IGF-like signaling pathway. Moreover, administration at different concentrations obviously altered the expression patterns of antioxidant genes and suppressed the severe stress responses induced by UV and oxidative stresses, suggesting that -induced tolerance to UV or oxidative stress might result from reactive oxygen species scavenging. administration during development was not necessarily a requirement for UV and oxidative stress resistance, and the concentrations of administrated examined were not toxic for nematodes. Therefore, administration could effectively retrieve the aging defects induced by UV irradiation and oxidative stress in .

Keywords： <italic>Bushenkangshuai Tangitalic>     UV irradiation     oxidative stress     tissue senescence     lifespan     <italic>Caenorhabditis elegansitalic>    

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Biosorption of Cd

Fengyu ZAN, Shouliang HUO, Beidou XI, Xiulan ZHAO

Frontiers of Environmental Science & Engineering 2012, Volume 6, Issue 1,   Pages 51-58 doi: 10.1007/s11783-011-0206-9

Abstract: The biosorption of Cd and Cu onto the immobilized ( ) was investigated in this study. Adsorption kinetics, isotherms and the effect of pH were studied. The results indicated that the biosorption of Cd and Cu on the immobilized was fast at initial stage and then became slow. The maximum biosorption of heavy metal ions on immobilized were observed at pH 4 for Cd and Cu . by the pseudo-second-order model described the sorption kinetic data well according to the high correlation coefficient ( ) obtained. The biosorption isotherm was fitted well by the Langmuir model, indicating possible mono-layer biosorption of Cd and Cu on the immobilized . Moreover, the immobilized after the sorption of Cd and Cu could be regenerated and reused.

Keywords： <italic>Saccharomyces cerevisiaeitalic> (<italic>S. cerevisiaeitalic>)     biosorption     heavy metals     immobilization    

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Title Author Date Type Operation

Biosorption of mercury and lead by aqueous

Pratibha SANJENBAM, Kumar SAURAV, Krishnan KANNABIRAN

Journal Article

Application of statistical design for the production of inulinase by

M. DILIPKUMAR, M. RAJASIMMAN, N. RAJAMOHAN

Journal Article

In situ enhanced bioremediation of dichlorvos by a phyllosphere

Jiying NING, Gang GANG, Zhihui BAI, Qing HU, Hongyan QI, Anzhou MA, Xuliang ZHUAN, Guoqiang ZHUANG

Journal Article

Carbon dioxide fixation by

Xuan JIA, Hai YAN, Zijing WANG, Huanju HE, Qianqian XU, Haiou WANG, Chunhua YIN, Liqin LIU

Journal Article

Mutagenesis and selective breeding of a high producing

Tian WANG, Shiru JIA, Zhilei TAN, Yujie DAI, Shuai SONG, Guoliang WANG

Journal Article

EXTRACTION AND EVALUATION OF EDIBLE OIL FROM SCHIZOCHYTRIUM SP. USING AN AQUEOUS ENZYMATIC METHOD

Journal Article

Microcystin-LR biodegradation by

Chengbin XIAO, Hai YAN, Junfeng WANG, Wei WEI, Jun NING, Gang PAN

Journal Article

The <italic>rpoSitalic> deficiency suppresses acetate accumulation in glucose-enriched culture of <italic>Escherichia coliitalic> under an aerobic condition

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

Journal Article

Nitrogen distribution in the products from the hydrothermal liquefaction of sp. and sp.

Journal Article

Effect of pH on biologic degradation of

Hongjing LI, Mengli HAO, Jingxian LIU, Chen CHEN, Zhengqiu FAN, Xiangrong WANG

Journal Article

Synthesis of depsipeptides from

Hongfei CAO, Yakai FENG, Heyun WANG, Li ZHANG, Musammir KHAN, Jintang GUO

Journal Article

Assessment of toxicity of two nitroaromatic compounds in the freshwater fish

Hongyan SHEN, Jixi GAO, Jinsheng WANG

Journal Article

Investigations on color variations of <italic>Morpho rhetenoritalic> butterfly wing scales

Guanglan LIAO, Haibo ZUO, Xuan JIANG, Xuefeng YANG, Tielin SHI

Journal Article

Administration with

Qi RUI, Qin LU, Dayong WANG

Journal Article

Biosorption of Cd

Fengyu ZAN, Shouliang HUO, Beidou XI, Xiulan ZHAO

Journal Article