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| Registros recuperados: 18 | |
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| Ramalhosa, Elsa; Río-Segade, Susana. |
| Mercury is one of the hazardous contaminants that may be present in the environment. Moreover, its toxicological effects are strongly dependent on the chemical form of the element, being the organic species the most toxic. In spite of this, the determination of mercury compounds in environmental samples, such as water, soils, sediments and biological matrixes, is of great importance. This review examines the current state of the sample treatments that have been developed, during the last 18 years (1990-2007),previous to separation and detection of mercury compounds, namely acid lixiviation, distillation,alkaline digestion and supercritical fluid extraction, as well as of the chromatographic techniques (gas chromatography and high performance liquid... |
| Tipo: Article |
Palavras-chave: Mercury; Speciation; Analytical methods; Gas chromatography; Liquid chromatography. |
| Ano: 2008 |
URL: http://hdl.handle.net/10198/3605 |
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| CORRÊA, J. C.; ROSSETTI, A. G.. |
| Foram realizadas comparações entre o Método das Pesagens e o Método Gravimétrico Padrão utilizados para determinar a umidade dos solo. Para determinar a umidade foram tiradas dez amostras e feitas três dimensões nas profundidades de 0cm a 20cm em quatro tipos de solo. Os dados foram comparados através do coeficiente de correlação (r), encontrando-se r=0,9607 para Podzolico Vermelho Amarelo sob capoeira; r= 0,8988 para Podzolico Vermelho Amarelo sob mata sem uso; r= 0,8967 para Latossolo Amarelo sob mata sem uso; e r=0,9503 para Latossolo Amarelo sob mata com uso, todos positivos e significativos, indicando equivalência entre os dois métodos para esses solos. Recomenda-se o Método das Pesagens por ser mais simples, rápido e exigirem instrumentos mais simples. |
| Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E) |
Palavras-chave: Determinação; Brasil; Amazonas.; Método; Umidade.; Solo; Analytical methods; Humidity; Soil.. |
| Ano: 1984 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/665139 |
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| Foreword, Introduction, Integrated Database Management for Agricultural Planning and Research, by J.W.T. Bottema; Introduction to Relational Database Management Systems, by Gary Timoshenko; Access Relational Database Management System, by Terry van Druemel, Hasrat Madiadipura, Muhamad Arif and Gary Timoshenko; Geographic Information Systems: An Overview, by Mohammad A.T. Chowdhury; Geographical Information Systems: MapInfo, by Muhamad Arif, Siemon Hollema and Mohammad Chowdhury; Sets: An Approach to Decision-Making and Conceptualization, by J.W.T. Bottema and Mohammad A.T Chowdhury; Introduction to Spreadsheets, Gary Timoshenko; Elementary Statistical Methods for Agricultural Research, by Siemon Hollema; Linear Programming and Multiple Goal Linear... |
| Tipo: Report |
Palavras-chave: Databases; Information services; Analytical methods; Planning; Agricultural and Food Policy; International Development. |
| Ano: 2000 |
URL: http://purl.umn.edu/32732 |
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| Takahashi,Anita Akiko; Martins,Maristela Satou; Della Torre,Jussara Carvalho de Moura; Oliveira,Camila Cardoso de; Granato,Daniel. |
| AbstractThis study aimed to evaluate the effect of the distillation time and the sample mass on the total SO2 content in integral passion fruit juice (Passiflora sp). For the SO2 analysis, a modified version of the Monier-Williams method was used. In this experiment, the distillation time and the sample mass were reduced to half of the values proposed in the original method. The analyses were performed in triplicate for each distilling time x sample mass binomial, making a total of 12 tests, which were performed on the same day. The significance of the effects of the different distillation times and sample mass were evaluated by applying one-factor analysis of variance (ANOVA). For a 95% confidence limit, it was found that the proposed amendments to the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Sulfur dioxide; Analytical methods; Passion fruit juice; Sulfites; Design of experiments. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612015000300434 |
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| Bourgeois, Robin; Jesus, Franck. |
| Part I The Participatory Prospective Analysis (PPA) Method The philosophy of the PPA method Methodological components Presentation of the method Definition of the system's limits Identification of variables Selection and definition of key variables Mutual influence analysis Interpretation of influence/dependence links Definition of the states of variables Building scenarios Using scenarios Implementing the PPA Equipment and resources Organizing group work The question of experts and expertise Part II The PPA Method at Work: The Case of Secondary Crop Research and Development Prospects in Asia and the Pacific Context Organization of the PPA System identification Creation of a working group and workshop organization Process and results... |
| Tipo: Report |
Palavras-chave: Decision making; Analytical methods; Tools; Research and Development/Tech Change/Emerging Technologies. |
| Ano: 2004 |
URL: http://purl.umn.edu/32731 |
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| Silva,Sandra Jussara Nunes da; Schuch,Paula Zilles; Bernardi,Carmem Ronise; Vainstein,Marilene Henning; Jablonski,André; Bender,Renar João. |
| Patulin is a mycotoxin produced by several fungal species of the genera Penicillium and Aspergillus, found on several fruit species and, remarkably, in apples and apple products. Patulin has a broad spectrum of toxicity, including carcinogenicity and teratogenicity in animals. Due to the stability of the molecule, considerable amounts of patulin still remain in apple products after processing. This paper reviews different analytical methods for patulin determination and methods to reduce levels of patulin in apple products as well. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Micotoxins; Analytical methods; Apple. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452007000200043 |
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| Jesus, Franck; Bourgeois, Robin. |
| To attain sustainable development in the 21st century, the world's population still has to overcome many challenges; hunger, poverty, environmental degradation and depletion. Policy design in such a context is and will remain a complex task. On one hand, policy makers often lack information on stakeholders' strategies and constraints as well as on potential options for improvement. On the other hand, stakeholders do not always adhere to policies for lack of understanding of the pursued goals. It is not unusual to observe that often, real policy effects are not those initially expected. Furthermore, existing decision-making mechanisms for public intervention are increasingly questioned due to pressure for market liberalization, decentralization processes... |
| Tipo: Report |
Palavras-chave: Analytical methods; Tools; Decision making; Agricultural policies; Agricultural and Food Policy. |
| Ano: 2003 |
URL: http://purl.umn.edu/32737 |
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| Muszyński,S; Tomaszewska,E; Kwiecień,M; Dobrowolski,P; Świetlicka,I; Tanaś,W; Sołowiej,B; Ejtel,M; Szcześniak,E; Tomczyk-Warunek,T. |
| ABSTRACT In this study, the effect of replacement of soybean meal with raw chickpea seeds as a primary protein source in the diet of broiler chicks on physical properties of drumstick muscle (m. gastrocnemius) was examined. One-day-old Ross 308 broilers (n=160) were fed soybean meal (n=80) or raw chickpea seeds (n=80) as a primary protein source for 42 days. Drumstick muscles, after dissection and storage for 24 h at 5°C, were subjected to texture profile analysis to determine changes in the structural and material integrity, and the thermal stability of muscle proteins were assessed on the basis of differential scanning calorimetry measurements. Light meromyosin, heavy meromyosin and sarcoplasmic proteins in the meat samples of broilers fed raw chickpea... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Analytical methods; Dietary protein; Muscle structure; Physical properties. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2019000200302 |
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| WOELFL,STEFAN; VILLALOBOS,LORENA; PARRA,ÓSCAR. |
| Lake Riñihue is the last in a chain of glacially derived oligotrophic lakes in southern Chile and was the subject of limnological research by Dr. Hugo Campos and co-workers at the Universidad Austral de Chile, Valdivia, Chile, since the 1970's. Prof. Campos died in the field in 1998, and this paper now presents a review of these data with comments on methodology relevant to trophic parameters of this lake. Data are presented on inorganic nutrients, chlorophyll a, phytoplankton biomass, primary production and Secchi depth obtained over a period of 21 years between 1978 and 1997 in order to evaluate potential changes in these parameters over time. Non-parametric Wilcoxon rank sum tests were applied to determine temporal trends and revealed: (1) total... |
| Tipo: Journal article |
Palavras-chave: Eutrophication; North Patagonian lake; Nutrients; Trophy; Analytical methods. |
| Ano: 2003 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2003000300010 |
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| Registros recuperados: 18 | |
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