110 research outputs found

    Distribution of Nitrobacter and Nitrospira Communities in an Aerobic Activated Sludge Bioreactor and their Contributions to Nitrite Oxidation

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    ABSTRACT An analysis of nitrite-oxidizing bacteria in the activated sludge process of a full-scale partially nitrifying wastewater treatment plant revealed Nitrospira and Nitrobacter averaged 10 13 cells·L -1 and 10 12 cells·L -1 , respectively. Correlation coefficients linking shifts in NOB community to operational or environmental variables illustrated Nitrospira were negatively correlated to nitrite (r = -0.45, P<0.01), while Nitrobacter showed no significant relationship to nitrite (P=0.1017). Nitrospira was negative correlation to DO (r = -0.46, P<0.01) and positively correlated to temperature (r = 0.59, P<0.0001). However, Nitrobacter was positively correlated to DO (r = 0.38, P<0.01) and HRT (R = 0.33, P<0.05), as well as negatively correlated to temperature (r = -0.49, P<0.001) suggesting niche adaptations within the NOB community. The positive association between Nitrobacter and DO supports a selective advantage over Nitrospira in completely nitrifying plants. Given the operational schematic at this WWTP, Nitrospira contributed more to nitrification than Nitrobacter in this WWTP

    The Iowa Homemaker vol.21, no.7

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    Spreads, Marijean Feik, page 1 Exam Checks on Seniors, Ann Koebel, page 2 Home Demonstration Proves Its Worth, Marghetta Jebson, page 3 Knit and Save, Catherine Tidemanson, page 4 Skills Enter Free Lancing, Doris McCray, page 5 What’s New in Home Economics, Dorothy Olson, page 6 Midseason Sparkle for Sally, Pauline McMahon, page 8 Departmental Highlights, Lila Williamson, page 10 Visual Education Gains Scope, Betty Ann Iverson, page 12 Ingenuity Saves Cosmetics, Betty Roth, page 13 Across Alumnae Desks, Marjorie Thomas, page 14 Bookmarks, Julie Wendel, page 15 Women’s Day, Margaret Anne Clark, page 16 Alums in the News, Bette Simpson, page 1

    The Iowa Homemaker vol.33, no.7

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    It’s an Old Custom, Betty Holder, page 5 She Emphasizes Good Fun, Doris Jirsa, page 6 Celebrate, Plan a Buffet, Dorothy Will, page 7 Candle-Making, Jane Hammerly, page 8 Blue Ribbon Designs, Gwen Olson, page 10 Here’s An Idea, page 12 Laugh at Yourself, Len Green, page 14 Recipe for Perfume, Mary Jean Stoddard, page 15 Small Talk, Ruth Anderson, page 16 Translate That Menu, Joanne Ryals, page 17 Trends, Jane Montgomery, page 1

    The Iowa Homemaker vol.21, no.5

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    Candles Spread Christmas Cheer, Mary Ellen Sullivan, page 2 Milk Strengthens Defense, Betty Ann Iverson, page 3 American Wares Set Nation’s Tables, Ann Koebel, page 4 New World Harbours Refugees, Dorothy Ann Klein, page 5 Sally Anticipates a Gala Season, Mary Lou Springer, page 6 Applied Art Highlights, Lila Williamson, page 8 Bookmarks, Julie Wendel, page 9 What’s New in Home Economics, Dorothy Olson, page 10 For Holiday Shoppers, Betty Roth, page 12 Residence Halls Honor Women Leaders, Dorothy Gross, page 13 Express Ingenuity in Greetings, Doris Plagge, page 14 Alums in the News, Bette Simpson, page 15 Fruit Cakes for Holidays, Margaret Anne Clark, page 16 Across Alumnae Desks, Marjorie Thomas, page 18 Journalistic Spindles, Florence Byrnes, page 2

    The Iowa Homemaker vol.28, no.4

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    How’s Your Football I.Q.?, John Wood, page 2 Home Cookery Project on a One-burner Hot Plate, Margaret Leveson, page 4 Boost Your Bank Account, Virginia Myer, page 5 Introducing – Marjorie Garfield, Irene Nettleton, Barbara Allen, page 6 Housemothers Collect, Betty Fox, page 7 Food the European Way, Margaret Wallace, page 8 What’s New in Home Economics, Peggy Krenek, page 9 To You Who Dread Home Management, Nancy Baker, page 10 Victory for Vicky, Jo Ann Breckenridge, page 12 Here’s An Idea, Emogene Olson, page 14 A Farmwife’s Life For Me, Janet Sutherland, page 18 Keeping Up With Today, Mary West, page 20 Alums in the News, Patricia Close, page 2

    The Iowa Homemaker vol.21, no.3

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    Freshmen – Please Note, page 2 Hospital Research, Ann Koebel, page 3 Orchids to Pat, page 4 The Army Eats Well, Mary I. Barber, page 5 Making Things Grow, Betty Ann Iverson, page 6 Look Before You Snap, Kathryn Monson, page 7 Major Departments on Review, Elizabeth Murfield, page 8 Patriotic Sally, Patricia Hayes, page 10 What’s New in Home Economics, Dorothy Olson, page 12 Summer Job Holders Reap Experience, page 14 A List of Don’ts, Costume Design Class, page 15 We Salute Campus Leaders, Margaret Kirchner, page 16 Home Economics Looks to Future, M. L. Morton, page 17 Behind Bright Jackets, Julie Wendel, page 18 Alums in the News, Mary Elizabeth Sather, page 20 Nutrition for Defense, Dorothy Ann Roost, page 22 That Personal Touch, Margaret Ann Clarke, page 23 Journalistic Spindles, Elizabeth Hanson, page 2

    The Iowa Homemaker vol.21, no.8

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    We Want to Be Likeable, Mary Ellen Sullivan, page 2 Cotton hose Enlist Glamour, Elizabeth Ann Murfield, page 3 Memorial Union Plans Food for a Year, Pat Garberson, page 4 Government Drafts Textiles, Patricia Hayes, page 5 Gay Clothes Boost Sally’s Morale, Virginia Brainard, page 7 War Revamps Textile World, Betty Roth, page 8 Dehydrated Foods Gain New Victories, Janet Wilson, page 9 What’s New in Home Economics, Dorothy Olson, page 10 Departmental Highlights, Lila Williamson, page 12 War Rations British Homemaking, Marabeth Paddock, page 13 Across Alumnae Desks, Marjorie Thomas, page 14 Bookmarks, Julie Wendel, page 15 File That Information, Barbara Burbank, page 17 Alums in the News, Bette Simpson, page 18 For Victory, Margaret Ann Kirchner, page 20 Spindles, Trymby Calhoun, page 2
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