LEADER 05419nam 2200733 a 450 001 9910139559903321 005 20230802004253.0 010 $a1-283-33302-3 010 $a9786613333025 010 $a1-118-24497-4 010 $a1-118-24498-2 035 $a(CKB)2550000000064070 035 $a(EBL)818250 035 $a(OCoLC)768082706 035 $a(SSID)ssj0000904864 035 $a(PQKBManifestationID)12460432 035 $a(PQKBTitleCode)TC0000904864 035 $a(PQKBWorkID)10925030 035 $a(PQKB)10166721 035 $a(SSID)ssj0000539775 035 $a(PQKBManifestationID)12244136 035 $a(PQKBTitleCode)TC0000539775 035 $a(PQKBWorkID)10579906 035 $a(PQKB)10614068 035 $a(MiAaPQ)EBC818250 035 $a(Au-PeEL)EBL818250 035 $a(CaPaEBR)ebr10512953 035 $a(CaONFJC)MIL333302 035 $a(EXLCZ)992550000000064070 100 $a20110701d2012 uy 0 101 0 $aeng 135 $aur|n|---||||| 181 $ctxt 182 $cc 183 $acr 200 10$aOrganic production and food quality$b[electronic resource] $ea down to earth analysis /$fRobert Blair 210 $aAmes, Iowa $cWiley-Blackwell$d2012 215 $a1 online resource (298 p.) 225 1 $aFood science and technology 300 $aDescription based upon print version of record. 311 $a0-8138-1217-8 320 $aIncludes bibliographical references and index. 327 $aOrganic Production and Food Quality: A Down to Earth Analysis; Contents; Foreword; 1 The Shift to Organic Food; Background; Organic regulations; Consumer perceptions; Analysis of the topic; References; 2 Consumer Concerns About Food; The concerns; Consumer concerns and attitudes; Food regulations; Justification for consumer attitudes about the safety of organic and conventional foods; Range of organic foods; References; 3 Vegetable Produce; Pest and disease control; Documented findings on pesticide residues; Other chemical contaminants; Other toxic and antinutritional compounds in produce 327 $aHormonesCan organic produce cause food poisoning?; Nutrient concentrations; Organoleptic quality; Identification of organic produce; Food from afar; Finally: watch which salad veg you eat; Conclusions; References; 4 Fruit; Pesticide residues; Other risks with fruit; Chemical residues; Microbial problems; Mycotoxins; Cloning and gene-modified fruit; Nutrient concentrations; Appearance and organoleptic qualities; Preserves; Conclusions; References; 5 Cereal Grains; Pesticide residues; Chemical residues; Other issues relating to grains; Mycotoxins: are organic grains less safe? 327 $aGene-modified cropsNutritional and organoleptic qualities; Wheat; Oats; Barley; Conclusions; References; 6 Meat; Chemical and pesticide residues; Organic meat; Hormones; Hormone residue levels in meats. Do government agencies monitor for these?; Developing countries; Antibiotics; Bacterial contamination of meat; Cloning; Mad-cow disease; Contaminated beef products implicated; Gene modification; Nutritional and organoleptic qualities; Beef; Pork; Poultry; Fish; Conclusions; References; 7 Milk and Milk Products 163; The hormone issue; Raw milk; Antibiotic residues 327 $aPesticide and chemical residuesNutritional and organoleptic qualities; Research findings; Consumer findings; Conclusions; References; 8 Eggs; Cholesterol; Salmonella and food-poisoning; Contamination with residues; Antibiotics; Chemical residues; Egg quality; Research findings; Consumer findings; Conclusions; References; 9 Is Organic Food Safer?; Residues; Vegetable produce; Fruit; Cereal grains; Meat; Milk; Eggs; Food poisoning; Mycotoxins; Other anti-nutrients; Nitrate; Significance of the findings in relation to health; Other research on food and health; Health of farmers and farm workers 327 $aOther approachesConclusions; References; 10 Is Organic Food More Nutritious and "Tasty"?; Reviews; Analysis by food group; Vegetable produce; Fruit; Cereal grains; Meat; Milk; Eggs; Taste; References; 11 Psychology of Organic Food Choice; The safety issue; Nutritional quality and taste; Environmental issues; Image; Conclusions; References; 12 Conclusions; Reference; Appendix; Index 330 $aThe internet is rife with biased and unsubstantiated claims from the organic industry, and the treatment of issues such as food safety and quality by the media (""if it bleeds, it leads"") tends to have a negative impact on consumer perceptions about conventional food. Until recently, more and more consumers in many countries were opting to buy organic food over conventional food, resulting in a radical shift in food retailing. This was due to concerns over chemical residues, food poisoning resulting in recalls, food scares such as ""mad-cow"" disease, issues like gene-modified (GM foods), ant 410 0$aFood science and technology. 606 $aNatural foods$xProcessing 606 $aFood$xQuality 606 $aConsumers$xAttitudes 615 0$aNatural foods$xProcessing. 615 0$aFood$xQuality. 615 0$aConsumers$xAttitudes. 676 $a363.19/29 700 $aBlair$b Robert$f1933-$0523367 801 0$bMiAaPQ 801 1$bMiAaPQ 801 2$bMiAaPQ 906 $aBOOK 912 $a9910139559903321 996 $aOrganic production and food quality$91977955 997 $aUNINA LEADER 01100nam0 22002891i 450 001 UON00286839 005 20231205103904.675 010 $a88-7975-241-3 100 $a20070122d2000 |0itac50 ba 101 $aspa 102 $aIT 105 $a|||| 1|||| 200 1 $aEvolución religiosa y sentimiento de la muerte en la poesía de Blas de Otero$fPietro Luigi Quarta 205 $a2a ed 210 $aRoma$cCISU$d200 215 $a133 p.$d21 cm. 606 $aOTERO BLAS DE$xCritica$3UONC061887$2FI 620 $aIT$dRoma$3UONL000004 676 $a861.64$cPoesia spagnola, 1945-$v21 700 1$aQUARTA$bPietro Luigi$3UONV165451$0467718 712 $aCISU$3UONV265953$4650 801 $aIT$bSOL$c20240220$gRICA 899 $aSIBA - SISTEMA BIBLIOTECARIO DI ATENEO$2UONSI 912 $aUON00286839 950 $aSIBA - SISTEMA BIBLIOTECARIO DI ATENEO$dSI SPA III 0685 $eSI LO 70027 5 0685 996 $aEvolución religiosa y sentimiento de la muerte en la poesía de Blas de Otero$91249513 997 $aUNIOR LEADER 05029nam 2200625 a 450 001 9910830727603321 005 20230828213315.0 010 $a1-280-28821-3 010 $a9786610288212 010 $a0-470-36177-8 010 $a0-471-76767-0 010 $a0-471-76766-2 035 $a(CKB)1000000000355350 035 $a(EBL)243684 035 $a(OCoLC)171257434 035 $a(SSID)ssj0000187115 035 $a(PQKBManifestationID)11939159 035 $a(PQKBTitleCode)TC0000187115 035 $a(PQKBWorkID)10253626 035 $a(PQKB)10376049 035 $a(MiAaPQ)EBC243684 035 $a(EXLCZ)991000000000355350 100 $a20050512d2006 uy 0 101 0 $aeng 135 $aur|n|---||||| 181 $ctxt 182 $cc 183 $acr 200 10$aKetenes II$b[electronic resource] /$fThomas T. Tidwell 205 $a2nd ed. 210 $aHoboken, N.J. $cWiley-Interscience$dc2006 215 $a1 online resource (672 p.) 300 $aDescription based upon print version of record. 311 $a0-471-69282-4 320 $aIncludes bibliographical references and index. 327 $aKETENES II; Contents; Preface; Introduction; References; 1 Structure, Bonding, and Thermochemistry of Ketenes; 1.1 Theoretical and Computational Studies of Ketenes; 1.1.1 Molecular and Electronic Structure and Energy; References; 1.1.2 Theoretical and Computational Studies of Ketene Reactions; References; 1.1.3 Substituent Effects on Ketenes; References; 1.2 Molecular Structure Determinations; References; 1.3 Thermochemistry of Ketenes; References; 2 Spectroscopy and Physical Properties of Ketenes; 2.1 Nuclear Magnetic Resonance Spectroscopy; References 327 $a2.2 Ultraviolet Spectra, Photoelectron Spectra, and Chiroptical PropertiesReferences; 2.3 Infrared Spectra and Raman Spectra; References; 2.4 Dipole Moments; References; 2.5 Mass Spectrometry and Gas Phase Ion Chemistry; References; 3 Preparation of Ketenes; 3.1 Ketenes from Ketene Dimers; References; 3.2 Ketenes from Carboxylic Acids and their Derivatives; 3.2.1 Ketenes from Carboxylic Acids and Anhydrides; 3.2.1.1 Ketenes from Carboxylic Acids; References; 3.2.1.2 Ketenes from Acid Anhydrides; References; 3.2.2 Ketenes from Acyl Halides and Activated Acids; References 327 $a3.2.3 Ketenes from Esters3.2.3.1 Ketenes from Ester Enolates; 3.2.3.2 Ketenes by Ester Pyrolysis; References; 3.2.4 Ketenes by Dehalogenation of a-Halo Carboxylic Acid Derivatives; References; 3.3 Ketenes from Diazo Ketones (Wolff Rearrangements); 3.3.1 Thermal Wolff Rearrangement; 3.3.2 Catalyzed Wolff Rearrangement; 3.3.3 Photochemical Wolff Rearrangement; 3.3.4 Other Routes to Ketocarbene Rearrangements; References; 3.4 Ketenes by Photochemical and Thermolytic Methods; 3.4.1 Ketenes from Cyclobutanones and Cyclobutenones; References 327 $a3.4.2 Ketenes from Photolysis of Cycloalkanones and EnonesReferences; 3.4.3 Ketenes from Cyclohexadienones and other Cycloalkenones; References; 3.4.4 Ketenes from Dioxinones; References; 3.4.5 Ketenes by Thermolysis of Alkynyl Ethers; References; 3.4.6 Ketenes from other Thermolytic and Photochemical Routes; References; 3.5 Ketenes from Metal Carbene Complexes; References; 3.6 Ketene Formation from Cations and Free Radicals; References; 3.7 Ketenes from Oxidation of Alkynes; References; 3.8 Other Routes to Ketenes; References; 4 Types of Ketenes; 4.1 Carbon-Substituted Ketenes 327 $a4.1.1 AlkylketenesReferences; 4.1.2 Alkenylketenes; References; 4.1.3 Alkynyl- and Cyanoketenes; References; 4.1.4 Aryl- and Heteroarylketenes; References; 4.1.5 Cyclopropyl-, Cyclopropenyl-, and Oxiranylketenes; References; 4.1.6 Acylketenes; References; 4.1.7 Imidoylketenes; References; 4.1.8 Cumulene-Substituted Ketenes; References; 4.1.9 Ketenes with Charged, Radical, or Carbenic Side Chains; References; 4.1.10 Fulvenones and Cumulenones; 4.1.10.1 Triafulvenones; 4.1.10.2 Pentafulvenones; References; 4.1.11 Oxoquinone Methides, Oxoxylylenes, and Related Species; References 327 $a4.2 Nitrogen-Substituted Ketenes 330 $aThe most up-to-date single reference on ketene chemistry for the practicing researcherKetenes are valued by both practicing organic synthetic chemists and pharmaceutical researchers for their ease of preparation, high reactivity, and versatility of use.Ketenes, Second Edition is an updated version of the premier resource on this important class of compounds, and features a comprehensive, self-contained guide to all aspects of ketene chemistry, including:* Types of ketenes* Theoretical studies* Thermochemistry* Ketene preparation* Reactions, including mechani 606 $aKetenes 615 0$aKetenes. 676 $a547.036 676 $a547.436 676 $a547/.436 700 $aTidwell$b Thomas T.$f1939-$01606478 801 0$bMiAaPQ 801 1$bMiAaPQ 801 2$bMiAaPQ 906 $aBOOK 912 $a9910830727603321 996 $aKetenes II$93932283 997 $aUNINA LEADER 04086nam 2200481 450 001 9910820844203321 005 20230817184424.0 010 $a3-95987-108-2 035 $a(CKB)4100000011371408 035 $a(MiAaPQ)EBC6274247 035 $a(Au-PeEL)EBL6274247 035 $a(OCoLC)1182870700 035 $a62160ac7-d720-4904-9e7e-1780b0dd2d03 035 $a(EXLCZ)994100000011371408 100 $a20220525d2019 uy 0 101 0 $ager 135 $aurcnu|||||||| 181 $ctxt$2rdacontent 182 $cc$2rdamedia 183 $acr$2rdacarrier 200 10$aMathtrails in der Sekundarstufe I $eDer Einsatz von MathCityMap bei Zylinderproblemen in der neunten Klasse /$fJoerg Zender 205 $a1st ed. 210 1$aMu?nster :$cWTM Verlag fu?r wissenschaftliche Texte und Medien,$d[2019] 210 4$d©2019 215 $a1 online resource (166 pages) 225 0 $aHochschulschriften zur Mathematik-Didaktik ;$vBand 9 300 $aPublicationDate: 20190531 311 $a3-95987-107-4 320 $aIncludes bibliographical references. 327 $aIntro -- Inhaltsverzeichnis -- 1. Einleitung -- 2. Theorie -- 2.1. Die Geschichte der Mathtrails -- 2.2. Kategorisierung von Mathtrails -- 2.3. Didaktisch-methodische Aspekte von Mathtrails -- 2.4. Das MathCityMap Projekt -- 2.5. Forschungsstand zu Mathtrails und Forschungsfrage -- 3. Methode -- 3.1. Studiendesign -- 3.2. Ablauf der Studie -- 3.3. Eingruppierungstest -- 3.4. Nachverfolgbarkeit der Ergebnisse durch einen Code -- 3.5. Schulbuchanalyse -- 3.6. Aufgaben der Mathtrails -- 3.7. Ablauf des Treatments -- 3.8. Nachverfolgung und Log Daten -- 3.9. Vergleichstest -- 3.10. Diskussion der verwendeten Materialien -- 4. Ergebnisse und Diskussion -- 4.1. Ergebnisse -- 4.2. Diskussion -- 4.3. Parallelstudie zur Motivation von Iwan Gurjanow -- 5. Fazit und Ausblick -- Abbildungsverzeichnis -- Tabellenverzeichnis -- Literaturverzeichnis -- A. Schu?lerbrief -- B. Elternbrief. 330 $aLong description: Mathematische Wanderpfade (sogenannte Mathtrails) entstanden in den 1980ern in Anlehnung an die Naturlehrpfade der 60er und 70er Jahre. Die Idee ist einfach: Bewegung an der frischen Luft kombiniert mit Lerninhalten an den einzelnen Stationen soll motivieren und das Lernen nachhaltig fördern. Was erst einmal einleuchtend klingt und auch durch die bestehende (mathematik-)didaktische Theorie untermauert wird, ist allerdings seitdem wenig untersucht worden. Die vorliegende Arbeit möchte hier eine Lücke schließen und liefert empirische Ergebnisse zu der Frage, ob so ein Mathtrail tatsächlich zu besseren Ergebnissen im schuli-schen Bereich führt und wie es um die Nachhaltigkeit eines solchen Lernangebots bestellt ist. Dazu wurde eine Studie im Rhein-Main-Gebiet durchge-führt. Im ersten Schritt wurde das Thema auf Zylinder eingegrenzt, Stoff der Mittelstufe und an vielen Objekten draußen einsetzbar. Danach folgte eine Analyse aktueller Schulbücher, welche Typen von Textaufgaben zu Zylindern gestellt werden. Nachdem die Typisierung abgeschlossen war, konnten draußen ent-sprechende Aufgaben angelegt und zu einem Mathtrail kombiniert werden. Insgesamt 25 Schulklassen der neunten Jahrgangsstufe an Gymnasien und Realschulen konnten für eine Teilnahme an der Studie gewonnen werden. In einem klassischen Studiendesign wurden mit einem Teil der Klassen anstelle normalen Unterrichts zwei Mathtrails abgelaufen. Im Anschluss schrieben alle Klassen einen Test mit Textaufgaben zu Zylindern, dieser Test wurde ein halbes Jahr später wie-derholt. 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