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| 1 | Pathogenicity of bacterium, Xenorhabdus nematophila isolated from entomopathogenic nematode (Steinernema carpocapsae) and its secretion against Galleria mellonella larvae显示文摘The entomopathogenic bacterium, Xenorhabdus nematophila was isolated from the hemolymph of Galleria mel- lonella infected with Steinernema carpocapsae. The bacterial cells and its metabolic secretions have been found lethal to the Galleria larvae. Toxic secretion in broth caused 95% mortality within 4 d of application whereas the bacterial cells caused 93% mortality after 6 d. When filter and sand substrates were compared, the later one was observed as appropriate. Similarly, bacterial cells and secretion in broth were more effective at 14% moisture and 25 °C temperature treatments. Maximum insect mortality (100%) was observed when bacterial concentration of 4×106 cells/ml was used. Similarly, maximum bacterial cells in broth (95%) were penetrated into the insect body within 2 h of their application. However, when stored bacterial toxic secretion was applied to the insects its efficacy declined. On the other hand, when the same toxic secretion was dried and then dissolved either in broth or water was proved to be effective. The present study showed that the bacterium, X. nematophila or its toxic secretion can be used as an important component of integrated pest management against Galleria. | MAHAR Ali Nawaz MUNIR Muhammad ELAWAD Sami GOWEN Simon Richard HAGUE Nigel Graham Meckenzi | 2005 | Journal of Zhejiang University-Science B(Biomedicine & Biotechnology)2005，6，6： | 2 |
| 2 | Disposal of water treatment wastes containing arsenic — A review显示文摘 | Colin Sullivan Mark Tyrer Christopher R. Cheeseman Nigel J.D. Graham | 2009 | Science of the Total Environment2009，，8： | 2 |
| 3 | The Significance of Algae as Trihalomethane precursors显示文摘 | Graham Nigel J D | 1998 | Water Science and Technology1998，37，2： | 1 |
| 4 | Precursors of nitrogenous disinfection by-products in drinking water-a critical review and analysis 显示文摘 | Tom Bond Michael R Templeton Nigel Graham | 2012 | Journal of Hazardous Materials2012，，： | 1 |
| 5 | Comparisonof FeCl3 and alum pre-treatment on UF membrane fouling 显示文摘 | Wen-zheng Yu Nigel Graham Hui-juan Liu | 2013 | Chemical Engineering Journal2013，234，： | 1 |
| 6 | Occurrence and control of nitrogenous disinfection by-products in drinking water – A review显示文摘 | Tom Bond Jin Huang Michael R. Templeton Nigel Graham | 2011 | Water Research2011，，15： | 1 |
| 7 | Removal of humic substances by oxidation' biofilt tation processes a review 显示文摘 | Nigel J D Graham | 1999 | Wat Sci Tech1999，，9： | 1 |
| 8 | The significance of algae as trihalomethane precursors显示文摘 | Nigel J D Graham Valerie E Wardlaw Roger Perry Jia-qian Jiang | 1998 | Water Science and Technology1998，37，2： | 1 |
| 9 | Degradation of atrazine by manganese catalyzed ozonation: Influence of radical scavengers显示文摘 | Jun M Nigel J D Graham | 2000 | Water Research2000，34，15： | 1 |
| 10 | 显示文摘 | Nigel Graham Jiang Chengchun Li Xiangzhong | 2004 | Chemosphere2004，56，： | 1 |
| 11 | Degradation of atrazine by managanese-catalyzed ozonation - influence of radical scavengers显示文摘 | Jun Ma Nigel J D Graham | 2000 | Water Research2000，34，15： | 1 |
| 12 | Degradation of Atrazine by Manganese-Catalyzed Ozonation: Influence of Humic Substances显示文摘 | Ma Jun Graham Nigel J D | 1999 | Water Research1999，33，3： | 1 |
| 13 | Degradation of atrazine by manganese-catalyzed ozonation: influence of humic substances 显示文摘 | Ma Jun Graham Nigel J D | 1999 | Water Research1999，33，3： | 1 |
| 14 | Marketing negotiations in France, Germany, the United Kingdom, and the United States显示文摘 | Nigel C G Campbell Graham L John Alain Jolibert | 1988 | Journal of Marketing1988，52，4： | 1 |
| 15 | Pre-polymerised inorganic coagulants and phosphorus removal by coagulation- A re- view显示文摘 | Jiang J Q Graham Nigel J D | 1998 | Water SA1998，24，3： | 1 |
| 16 | The influen- ce ofpH on the degradation of phenol and chlorophenols by potassium fen-ate显示文摘 | Nigel Graham Cheng-chun Jiang Xiang-Zhong Li | 2004 | Chemosphere2004，56，10： | 1 |
| 17 | The influence of pH on thedegradation of phenol and chlorophenols by potassium fer-rate 显示文摘 | Nigel Graham Cheng - chun Jiang Xiang - Zhong Li Jia - Qian Jiang Jun Ma | 2004 | Chemosphere2004，56，10： | 1 |
| 18 | Removal of humic substances by oxidation/biofiltration pmcesses-a review显示文摘 | | 1999 | Wat Sci Tech1999，40，9： | 1 |
| 19 | Removal of Humic Substances by Oxidation/Biofiltration Processes 显示文摘 | Nigel JD Graham | 1999 | A Review War Sci Tech1999，40，9： | 1 |
| 20 | Unraveling Membrane Fouling Induced by Chlorinated Water Versus Surface Water:Biofouling Properties and Microbiological Investigation显示文摘Chlorine is usually applied in the urban water treatment process to deactivate pathogens and prevent waterborne diseases.As a pre-treatment,it remains unclear whether chlorinated water can effectively alleviate membrane fouling during ultrafiltration(UF).In this study,tap water was investigated for its effect on biofilm formation and biofouling in a gravity-driven membrane(GDM)filtration system.For comparison,biofilm/biofouling with untreated surface(lake)water was studied in parallel.It was found that more severe membrane fouling occurred with the filtration of tap water than lake water,and larger quantities of polysaccharide and extracellular DNA(eDNA)were present in the tap-water biofilm than in the lake-water biofilm.The tap-water biofilm had a densely compact morphology.In contrast,a porous,spider-like structure was observed for the lake-water biofilm,which was assumed to be associated with the bacteria in the biofilm.This hypothesis was verified by 16S ribosomal RNA(rRNA)sequencing,which demonstrated that Xanthobacter was the dominant taxon in the tap-water biofilm.Additionally,membrane hydrophobicity/hydrophilicity played a minor role in affecting the membrane fouling properties and microbial community.This study revealed the significant role of chlorine-resistant bacteria in biofouling formation and provides a deeper understanding of membrane fouling,which can potentially aid in searching for effective ways of controlling membrane fouling. | Li Zhang Lei Xu Nigel Graham Wenzheng Yu | 2022 | Engineering2022，8，8： | 1 |
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