Negussie megersa (19 risultati)

Condizione: New.

Condizione: New. pp. 84.

Condizione: New.

Condizione: New.

Condizione: New.

Condizione: New.

Condizione: Hervorragend. Zustand: Hervorragend | Sprache: Deutsch | Produktart: Bücher | Pflanzen sind nicht nur für essenzielle Nährstoffe vollkommen selektiv. Sie sind in der Lage, beträchtliche Mengen an Schadstoffen wie Schwermetallen aus der Umwelt (Boden, Wasser oder Luft) aufzunehmen. Infolgedessen können Menschen und Tiere, die solche Pflanzen nutzen, erhebliche Mengen an Schadstoffen in den verschiedenen Teilen ihres Gewebesystems anreichern. Aufgrund der möglichen Toxizität von Schadstoffen leiden die Verbraucher unter gesundheitlichen Problemen. Im Allgemeinen ist der Mensch den Schadstoffen über die Nahrungskette und durch zufällige Aufnahme ausgesetzt. Deshalb gilt: "Wenn wir uns um unsere Gesundheit sorgen, müssen wir uns auch um die Umwelt und die Stoffe, die wir verwenden, sorgen". …

Condizione: New. Print on Demand.

Condizione: New. PRINT ON DEMAND.

Taschenbuch. Condizione: Neu. nach der Bestellung gedruckt Neuware - Printed after ordering - The wide utilization of herbicides in the crop management has created a challenging problem in terms of residual herbicides. The major problems experienced are the contamination of soil, surface water, and possibly ground water with their residues. Therefore, systematic studies are needed to evaluate the toxicity of several substituted triazines and triazoles as well as their metal complexes in order to understand the role of substituents and metal complexation in modifying the activities of herbicidal compounds containing N-heterocyclic systems. This book describes the basic chemistry of derivatization and metal complexation of selected herbicide systems that can be used as a means for modifying their activities. Accordingly, Atrazine (ATZ), Simazine (SMZ), and Amitrole (ATA) were derivatized into HAATZ, HSMZ, and NSATA respectively. Co(II), Ni(II) and Cu(II) complexes of NASTA were synthesized. All the synthesized compounds were characterized on the basis of analytical, magnetic susceptibility, conductance, IR, NMR, UV-VIS spectral studies. An octahedral geometry for Co(II)-NSATA complex and square planar geometry for Ni(II)-NSATA and Cu(II)-NSTA complexes are proposed.…

Condizione: New. Dieser Artikel ist ein Print on Demand Artikel und wird nach Ihrer Bestellung fuer Sie gedruckt. Autor/Autorin: Boke AdugnaAdugna Boke (MSc.)Department of Chemistry Jimma University Oromia, EthiopiaPlants are not perfectly selective only to essential nutrients. They have ability to accumulate considerable quantities of con.…

Condizione: New. Print on Demand pp. 84 2:B&W 6 x 9 in or 229 x 152 mm Perfect Bound on Creme w/Gloss Lam.

Taschenbuch. Condizione: Neu. nach der Bestellung gedruckt Neuware - Printed after ordering - Plants are not perfectly selective only to essential nutrients. They have ability to accumulate considerable quantities of contaminants like heavy metals from the environment: soil, water or air. As the result, human being and animals uses such plants may accumulate significant quantities of contaminants in the various parts of their tissue systems. Because of the possible toxicity encountered from contaminants the consumers suffer by health problems. Generally human exposed to contaminant through food chain and incidental ingestion. Therefore, 'If we worry about our care we must worry about the environment and substance we use.'.…

Condizione: New. PRINT ON DEMAND pp. 84.

Condizione: New. Dieser Artikel ist ein Print on Demand Artikel und wird nach Ihrer Bestellung fuer Sie gedruckt. Autor/Autorin: Merdassa YaredHe is a lecturer in Jimma University, Department of Chemistry, Jimma, Ethiopia. Currently, he is pursuing his PhD in Addis Ababa University, Department of Chemistry, Addis Ababa, Ethiopia under supervision of Dr. Neguss.…

Taschenbuch. Condizione: Neu. This item is printed on demand - Print on Demand Titel. Neuware -The wide utilization of herbicides in the crop management has created a challenging problem in terms of residual herbicides. The major problems experienced are the contamination of soil, surface water, and possibly ground water with their residues. Therefore, systematic studies are needed to evaluate the toxicity of several substituted triazines and triazoles as well as their metal complexes in order to understand the role of substituents and metal complexation in modifying the activities of herbicidal compounds containing N-heterocyclic systems. This book describes the basic chemistry of derivatization and metal complexation of selected herbicide systems that can be used as a means for modifying their activities. Accordingly, Atrazine (ATZ), Simazine (SMZ), and Amitrole (ATA) were derivatized into HAATZ, HSMZ, and NSATA respectively. Co(II), Ni(II) and Cu(II) complexes of NASTA were synthesized. All the synthesized compounds were characterized on the basis of analytical, magnetic susceptibility, conductance, IR, NMR, UV-VIS spectral studies. An octahedral geometry for Co(II)-NSATA complex and square planar geometry for Ni(II)-NSATA and Cu(II)-NSTA complexes are proposed.OmniScriptum SRL, Str. Armeneasca 28/1, office 1, 2012 Chisinau 84 pp. Englisch.…

Taschenbuch. Condizione: Neu. nach der Bestellung gedruckt Neuware - Printed after ordering - Les plantes ne sont pas parfaitement sélectives aux seuls nutriments essentiels. Elles ont la capacité d'accumuler des quantités considérables de contaminants tels que les métaux lourds provenant de l'environnement : le sol, l'eau ou l'air. Par conséquent, les êtres humains et les animaux qui utilisent ces plantes peuvent accumuler des quantités significatives de contaminants dans les différentes parties de leurs systèmes tissulaires. En raison de la toxicité possible des contaminants, les consommateurs souffrent de problèmes de santé. En général, l'homme est exposé aux contaminants par le biais de la chaîne alimentaire et par ingestion accidentelle. Par conséquent, 'si nous nous préoccupons de nos soins, nous devons nous préoccuper de l'environnement et des substances que nous utilisons'.…

Taschenbuch. Condizione: Neu. nach der Bestellung gedruckt Neuware - Printed after ordering - Le piante non sono perfettamente selettive solo nei confronti dei nutrienti essenziali. Hanno la capacità di accumulare quantità considerevoli di contaminanti come i metalli pesanti provenienti dall'ambiente: suolo, acqua o aria. Di conseguenza, gli esseri umani e gli animali che utilizzano tali piante possono accumulare quantità significative di contaminanti nelle varie parti dei loro sistemi tissutali. A causa della possibile tossicità dei contaminanti, i consumatori soffrono di problemi di salute. Generalmente l'uomo è esposto ai contaminanti attraverso la catena alimentare e l'ingestione accidentale. Pertanto, 'se ci preoccupiamo della nostra salute, dobbiamo preoccuparci dell'ambiente e delle sostanze che usiamo'.…

Condizione: New. Dieser Artikel ist ein Print on Demand Artikel und wird nach Ihrer Bestellung fuer Sie gedruckt. Autor/Autorin: Boke AdugnaAdugna Boke (MSc.) Fachbereich Chemie Universitaet Jimma Oromia, Aethiopien.Pflanzen sind nicht nur fuer essenzielle Naehrstoffe vollkommen selektiv. Sie sind in der Lage, betraechtliche Mengen an Schadstoffen wie Schwer.…