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Effects of different sediment fractions on sorption of galaxolide

Lixia JIN, Mengchang HE, Jinghuan ZHANG

Frontiers of Environmental Science & Engineering 2012, Volume 6, Issue 1,   Pages 59-65 doi: 10.1007/s11783-010-0259-1

Abstract: isotherms of galaxolide (HHCB) of different fractions from two sediments with different mineral and organic carbonThe dissolved organic carbon (DOC) removed, NaOH extracted, and 375°C heating fractions showed more nonlinearCompared to the original sediments, the 375°C heating fractions had higher carbon-normalized distributioncoefficient ( ) values, indicating a higher sorption affinity for HHCB.

Keywords： galaxolide (HHCB)     sorption     organic carbon     sediment     carbon-normalized distribution coefficient (<italic>Kitalic>oc)    

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Application of

Weifang SHI, Weihua ZENG

Frontiers of Environmental Science & Engineering 2014, Volume 8, Issue 1,   Pages 117-127 doi: 10.1007/s11783-013-0581-5

Abstract: We obtain the optimal clustering number with the largest average silhouette coefficient by calculating

Keywords： environmental risk zoning     <italic>kitalic>-means clustering     silhouette coefficient     chemical industrial    

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Developing the QSPR model for predicting the storage lipid/water distribution coefficient of organic

Miao Li, Jian Li, Yuchen Lu, Cenyang Han, Xiaoxuan Wei, Guangcai Ma, Haiying Yu

Frontiers of Environmental Science & Engineering 2021, Volume 15, Issue 2, doi: 10.1007/s11783-020-1316-z

Abstract: Abstract • A predictive model for storage lipid/water distribution coefficient was developed. • TheThe distribution of organic compounds in stored lipids affects their migration, transformation, bioaccumulationThe storage lipid/water distribution coefficient (log Klip/w) of organic chemicals, which quantitativelydetermines such distribution, has become a key parameter to assist their ecological security and healthQuantum chemical descriptors and n-octanol/water partitioning coefficient were employed to characterize

Keywords： Storage lipid/water distribution coefficient     log Klip/w     Organic compounds     QSPR     Quantum    

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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: promising microalgal strain isolated from fresh water, which can grow both autotrophically on inorganic carbonunder lighting and heterotrophically on organic carbon without lighting, was identified as sp.USTB-01 for the fixation of carbon dioxide (CO ). It showed that the autotrophic growth of sp.

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

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Detecting

Chengkun WANG, Xiaojian ZHANG, Jun WANG, Chao CHEN

Frontiers of Environmental Science & Engineering 2012, Volume 6, Issue 6,   Pages 770-777 doi: 10.1007/s11783-012-0412-0

Abstract: preparation was developed to study the occurrence of nitrosamines in several water treatment plants and distributionother nitrosamines were found at fairly high concentrations in several water treatment plants and distributionHigher concentrations of nitrosamines were detected in distribution systems that were further away from

Keywords： <italic>N-italic>nitrosamines     water treatment plant     distribution system     ultra-performance liquid chromatography-tandem    

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Data-driven distribution network topology identification considering correlated generation power of distributed

Frontiers in Energy 2022, Volume 16, Issue 1,   Pages 121-129 doi: 10.1007/s11708-021-0780-x

Abstract: This paper proposes a data-driven topology identification method for distribution systems with distributedSecond, a maximal information coefficient-based maximum spanning tree algorithm is developed to obtainThe proposed method is tested on different distribution networks and the simulation results are compared

Keywords： power distribution network     data-driven     topology identification     distributed energy resource     maximalinformation coefficient    

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A model of

Jingyu WANG,Hongwei FANG,Guojian HE,Lei HUANG

Frontiers of Environmental Science & Engineering 2014, Volume 8, Issue 6,   Pages 845-853 doi: 10.1007/s11783-014-0708-3

Abstract: liquid interfaces and a surface micromorphology model of sediments, a theoretical expression of the distributioncoefficient is derived.This coefficient has significant effects on the distribution of radionuclide in seawater, suspended sediment

Keywords： distribution coefficient     Daya Bay     hydrodynamic     sediment transport     radionuclide transport    

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Improvement in growth yield of single-walled carbon nanotubes with narrow chirality distribution by pulse

Bin Xu, Toshiro Kaneko, Toshiaki Kato

Frontiers of Chemical Science and Engineering 2019, Volume 13, Issue 3,   Pages 485-492 doi: 10.1007/s11705-019-1831-2

Abstract: chemical vapor deposition (CVD) technique was developed for improving the growth yield of single-walled carbonnanotubes (SWNTs) with a narrow chirality distribution.improved by repetitive short duration pulse plasma CVD, while maintaining the initial narrow chirality distributionThe growth of SWNTs with a narrow chirality distribution could be controlled by the difference in the

Keywords： single-walled carbon nanotubes     chirality-controlled synthesis     pulse plasma chemical vapor deposition    

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Impact of total organic carbon and chlorine to ammonia ratio on nitrification in a bench-scale drinkingwater distribution system

Yongji ZHANG, Lingling ZHOU, Guo ZENG, Huiping DENG, Guibai LI

Frontiers of Environmental Science & Engineering 2010, Volume 4, Issue 4,   Pages 430-437 doi: 10.1007/s11783-010-0247-5

Abstract: The aim of this study was to investigate the impact of total organic carbon and chlorine to ammonia ratioon nitrification potential in a simulated drinking water distribution system as during chloraminationfour rotating annular bioreactors (RAB) with different chlorine to ammonia ratios and total organic carbon

Keywords： nitrification     drinking water     ammonia- oxidizing bacteria (AOB)     chloramines     organic carbon     heterotrophic    

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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 thisThese results demonstrated changed the central carbon metabolism toward acetate overflow through dehydrogenation

Keywords： <italic>Escherichia coliitalic>     <italic>rpoSitalic>     aerobic and glucose-enriched culture     overflow    

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Distribution and temporal variability of the solar resource at a site in south-east Norway

Muyiwa S. ADARAMOLA

Frontiers in Energy 2016, Volume 10, Issue 4,   Pages 375-381 doi: 10.1007/s11708-016-0426-6

Abstract: This paper investigated the distribution and variability of solar radiation using the a 10-year (2006In addition, it is found that the inter-annual coefficient of variation of the global solar radiation

Keywords： coefficient of variation     global solar radiation     diffuse ratio     albedo     PV energy systems    

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Unnormalized and normalized forms of gefura measures in directed and undirected networks

Raf GUNS,Ronald ROUSSEAU

Frontiers of Information Technology & Electronic Engineering 2015, Volume 16, Issue 4,   Pages 311-320 doi: 10.1631/FITEE.1400425

Abstract: In some networks nodes belong to predefined groups (e.g., authors belong to institutions). Common network centrality measures do not take this structure into account. Gefura measures are designed as indicators of a node’s brokerage role between such groups. They are defined as variants of betweenness centrality and consider to what extent a node belongs to shortest paths between nodes from different groups. In this article we make the following new contributions to their study: (1) We systematically study unnormalized gefura measures and show that, next to the ‘structural’ normalization that has hitherto been applied, a ‘basic’ normalization procedure is possible. While the former normalizes at the level of groups, the latter normalizes at the level of nodes. (2) Treating undirected networks as equivalent to symmetric directed networks, we expand the definition of gefura measures to the directed case. (3) It is shown how Brandes’ algorithm for betweenness centrality can be adjusted to cover these cases.

Keywords： Networks subdivided in groups     Partitions     Gefura measures     Q-measures     Brokerage role     Directed and undirected networks     Brandes’     algorithm    

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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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Comparisons in subcellular and biochemical behaviors of cadmium between low-Cd and high-Cd accumulation cultivars of pakchoi (

Meng XUE, Yihui ZHOU, Zhongyi YANG, Biyun LIN, Jiangang YUAN, Shanshan WU

Frontiers of Environmental Science & Engineering 2014, Volume 8, Issue 2,   Pages 226-238 doi: 10.1007/s11783-013-0582-4

Abstract: Subcellular distributions and chemical forms of cadmium (Cd) in the leaves, stems and roots were investigated in low-Cd accumulation cultivars and high-Cd accumulation cultivars of pakchoi ( L.). Root cell wall played a key role in limiting soil Cd from entering the protoplast, especially in the low-Cd cultivars. The high-Cd cultivars had significantly higher leaf and stem Cd concentrations than the low-Cd cultivars in cell wall fraction, chloroplast/trophoplast fraction, organelle fraction and soluble fraction. In low-Cd cultivars, which were more sensitive and thus had greater physiological needs of Cd detoxification than high-Cd cultivars, leaf vacuole sequestrated higher proportions of Cd. Cd in the form of pectate/protein complexes (extracted by 1 mol·L NaCl) played a decisive role in Cd translocation from root to shoot, which might be one of the mechanisms that led to the differences in shoot Cd accumulation between the two types of cultivars. Furthermore, the formation of Cd-phosphate complexes (extracted by 2% HAc) was also involved in Cd detoxification within the roots of pakchoi under high Cd stress, suggesting that the mechanisms of Cd detoxification might be different between low- and high-Cd cultivars.

Keywords： cadmium (Cd)     low-Cd cultivar     pakchoi (<italic>Brassica chinensisitalic> L.)     subcellular distribution     chemical forms    

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Title Author Date Type Operation

Effects of different sediment fractions on sorption of galaxolide

Lixia JIN, Mengchang HE, Jinghuan ZHANG

Journal Article

Application of

Weifang SHI, Weihua ZENG

Journal Article

Developing the QSPR model for predicting the storage lipid/water distribution coefficient of organic

Miao Li, Jian Li, Yuchen Lu, Cenyang Han, Xiaoxuan Wei, Guangcai Ma, Haiying Yu

Journal Article

Carbon dioxide fixation by

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

Journal Article

Detecting

Chengkun WANG, Xiaojian ZHANG, Jun WANG, Chao CHEN

Journal Article

Data-driven distribution network topology identification considering correlated generation power of distributed

Journal Article

A model of

Jingyu WANG,Hongwei FANG,Guojian HE,Lei HUANG

Journal Article

Improvement in growth yield of single-walled carbon nanotubes with narrow chirality distribution by pulse

Bin Xu, Toshiro Kaneko, Toshiaki Kato

Journal Article

Impact of total organic carbon and chlorine to ammonia ratio on nitrification in a bench-scale drinkingwater distribution system

Yongji ZHANG, Lingling ZHOU, Guo ZENG, Huiping DENG, Guibai LI

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

Distribution and temporal variability of the solar resource at a site in south-east Norway

Muyiwa S. ADARAMOLA

Journal Article

Unnormalized and normalized forms of gefura measures in directed and undirected networks

Raf GUNS,Ronald ROUSSEAU

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

Comparisons in subcellular and biochemical behaviors of cadmium between low-Cd and high-Cd accumulation cultivars of pakchoi (

Meng XUE, Yihui ZHOU, Zhongyi YANG, Biyun LIN, Jiangang YUAN, Shanshan WU

Journal Article