Data/hora: 23/06/2024 04:41:22

Biblioteca(s): 	Embrapa Solos.	
Data corrente: 	09/02/2009	
Data da última atualização: 	12/01/2022	
Autoria: 	HAYES, M. H. B.; NOVOTNY, E. H.; FLANAGAN, R.	
Afiliação: 	MICHAEL H. B. HAYES, UNIVERSITY OF LIMERICK; ETELVINO HENRIQUE NOVOTNY, CNPS; ROBERT FLANAGAN, UNIVERSITY OF LIMERICK.	
Título: 	Biochar and it's characterisations.	
Ano de publicação: 	2008	
Fonte/Imprenta: 	In: ANNUAL INTERNATIONAL MEETING OF THE INTERNATIONAL BIOCHAR INITIATIVE, 2., 2008, Newcastle. Biochar, sustainability and security in a changing climate. Newcastle: International Biochar Initiative, 2008. p. 16. Oral presentations.	
Idioma: 	Inglês	
Conteúdo: 	NMR provides a powerful tool for studies of compositions of Biochars. However, the usual NMR procedures used for humic and SOM studies do not meet specific requirements for Biochars because pyrogenic materials present strong local magnetic susceptibility heterogeneities. Our data show that uses of CSA-filter and TOSS techniques make the pulse sequences very sensitive to imperfections in the pulses. We will show how we have used Variable Amplitude CP - (VACP)/MAS spectra and composite pulses in the CSA-filter and TOSS pulse sequences. In that way the component functionalities in a humic acid (HA) from a Terra Preta soil were successfully determined. Other techniques will be discussed.	
Palavras-Chave: 	NMR; Terra preta de índio.	
Thesaurus Nal: 	Biochar; Soil organic matter.	
Categoria do assunto: 	P Recursos Naturais, Ciências Ambientais e da Terra	
URL: 	http://ainfo.cnptia.embrapa.br/digital/bitstream/item/230193/1/Biochar-and-its-characterisations-2008.pdf	
Registro original: 	Embrapa Solos (CNPS)	
Exemplares: 	CNPS - (13754-1) - UPC - RA - DD -  -  - 2009.00115 - DIS