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| Registros recuperados: 8.909 | |
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| Rocha,H.A.O.; Franco,C.R.C.; Trindade,E.S.; Carvalho,L.C.M.; Veiga,S.S.; Leite,E.L.; Dietrich,C.P.; Nader,H.B.. |
| Fucans, a family of sulfated polysaccharides present in brown seaweed, have several biological activities. Their use as drugs would offer the advantage of no potential risk of contamination with viruses or particles such as prions. A fucan prepared from Spatoglossum schröederi was tested as a possible inhibitor of cell-matrix interactions using wild-type Chinese hamster ovary cells (CHO-K1) and the mutant type deficient in xylosyltransferase (CHO-745). The effect of this polymer on adhesion properties with specific extracellular matrix components was studied using several matrix proteins as substrates for cell attachment. Treatment with the polymer inhibited the adhesion of fibronectin to both CHO-K1 (2 x 10(5))()and CHO-745 (2 x 10(5) and 5 x 10(5))... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: CHO cells; Extracellular matrix proteins; Fucan; Glycosaminoglycans; Cell adhesion; Brown algae. |
| Ano: 2001 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2001000500009 |
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| Fontana, Marzia; Wobst, Peter. |
| This working paper documents the construction of a 1993-94 Social Accounting Matrix (SAM) for Bangladesh. 1 The SAM distinguishes 10 agricultural sectors—including two different kinds of rice technology—and 19 manufacturing sectors, out of 43 sectors in total. It also differentiates between twelve socio-economic groups, allowing detailed analysis of household welfare and poverty. The SAM has ten factors of production: one type of capital, one type of land and eight different types of labor which are disaggregated by both level of education and gender. The innovative feature of the SAM is that it separates out female and male labor value-added for each educational level and in each sector of the economy, providing a base for gender-sensitive analyses of... |
| Tipo: Working or Discussion Paper |
Palavras-chave: International Development. |
| Ano: 2001 |
URL: http://purl.umn.edu/16285 |
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| Dornelas,Marcelo C.; Rodriguez,Adriana P.M.. |
| In sugarcane (Saccharum sp) as with other species of grass, at a certain moment of its life cycle the vegetative meristem is converted into an inflorescence meristem which has at least two distinct inflorescence branching steps before the spikelet meristem terminates in the production of a flower (floret). In model dicotyledonous species such successive conversions of meristem identities and the concentric arrangement of floral organs in specific whorls have both been shown to be genetically controlled. Using data from the Sugarcane Expressed Sequence Tag (EST) Project (SUCEST) database, we have identified all sugarcane proteins and genes putatively involved in reproductive meristem and flower development. Sequence comparisons of known flower-related genes... |
| Tipo: Info:eu-repo/semantics/article |
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| Ano: 2001 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572001000100011 |
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| Diao, Xinshen; Somwaru, Agapi; Roe, Terry L.. |
| The effect on production, trade and well-being from the granting of market access, removing export subsidies, and eliminating trade-distorting forms of direct support to farmers in WTO member countries is analyzed from a world-wide general equilibrium perspective using the most recently available data. The results suggest that removing trade barriers, subsidies and support will cause aggregate world prices of agricultural commodities to rise by over 11 percent relative to an index of all other prices. Agricultural support and protection in the developed countries is found to be the major cause of low agricultural prices, and implicitly, a tax on net agricultural exporters in developing countries. Livestock product prices are likely to increase the most... |
| Tipo: Working or Discussion Paper |
Palavras-chave: International Relations/Trade. |
| Ano: 2001 |
URL: http://purl.umn.edu/12984 |
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| Runge, C. Ford. |
| This paper traces the evolution of the debate over a GEO, and analyzes its problems and opportunities in the world trading system. It first considers the genesis of proposals for a GEO, and provides a short historical account. Second, it offers one view of what a GEO might entail. The next two sections offer a brief summary of some of the main arguments for and against such a body. The fifth section discusses issues of implementation, and the relationship between a GEO and existing institutions with environmental or trade responsibilities, such as UNEP and the WTO. It also considers whether a GEO should be built up incrementally, or whether a 'grand stroke' would be more effective in establishing it. The sixth section takes up three related issues: the... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Environmental Economics and Policy; International Relations/Trade. |
| Ano: 2001 |
URL: http://purl.umn.edu/14448 |
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| Sohngen, Brent; Mendelsohn, Robert; Sedjo, Roger A.. |
| Several papers have now estimated the impact of climate change on national timber markets, but few studies have measured impacts globally. Further, the literature on impacts has focused heavily on changes in productivity and has not integrated movements of biomes as well. Here, a dynamic model of ecological change and economic change is developed to capture the impact of climate change on world timber markets. Climate change is predicted to increase global timber production as producers in low-mid latitude forests react quickly with more productive short-rotation plantations, driving down timber prices. Producers in mid-high latitude forests, in contrast, are likely to be hurt by the lower prices, dieback, and slower productivity increases because of... |
| Tipo: Journal Article |
Palavras-chave: Resource /Energy Economics and Policy. |
| Ano: 2001 |
URL: http://purl.umn.edu/31044 |
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| Brockmeier, Martina. |
| This paper offers a graphical exposition of the GTAP model of global trade. Particular emphasis is placed on the accounting, or equilibrium, relationships in the model. It begins with a treatment of the a one region version of GTAP, thereafter adding a rest of world region to highlight the treatment of trade flows in the model. The implementation of policy instruments in GTAP is also explored, using simple supply-demand graphics. The material provided in this paper was first developed as an introduction to GTAP for participants taking the annual short course. Based on its success in that venue, this paper has been placed on the "highly recommended" reading list for individuals seeking an introduction and overview of the GTAP framework. This paper offers... |
| Tipo: Working or Discussion Paper |
Palavras-chave: International Relations/Trade. |
| Ano: 2001 |
URL: http://purl.umn.edu/28706 |
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| Falk,Torsten; Strazdas,Lori A.; Borders,Rebecca S.; Kilani,Ramsey K.; Yool,Andrea J.; Sherman,Scott J.. |
| High-density cultures of mammalian neurons offer a model system for studies of brain development, but the morphological features of individual neurons is difficult to ascertain. We show that a herpes virus vector expressing a bioluminescent protein allows detailed morphometric analyses of living neurons in complex culture environments. Expression of enhanced green fluorescent protein (eGFP) was constitutively driven in neurons using the herpes simplex virus amplicon system. This system allowed us to make novel observations regarding development in high-density cultures from rat hippocampus and cerebellum. After the phase of initial neurite outgrowth, maturing neurons continue to show rapid remodeling of the neurite branches (0.79 ± 0.11 mum/h per neurite;... |
| Tipo: Journal article |
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| Ano: 2001 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582001000100004 |
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| Renault, Tristan; Lipart, Cecile; Arzul, Isabelle. |
| Sporadic high mortalities were reported in June 1997 among hatchery-reared larval Manila clam Ruditapes philippinarum in a French commercial hatchery. Cellular abnormalities were observed in semi-thin sections in affected animals. Transmission electron microscopy revealed the presence of herpes-like virus particles in larvae. This is the first description of a herpes-like virus infection in larval R. philippinarum, a non-ostreid bivalve species. Virus particles were similar to other herpes-like viruses described from different oyster species with respect to ultrastructure and morphogenesis. Electron microscopic examination also demonstrated cells with condensed chromatin and extensive perinuclear fragmentation of chromatin. Like viruses infecting oysters,... |
| Tipo: Text |
Palavras-chave: Apoptosis; Virus replication; Mortality; Ruditapes philippinarum; Manila clam; Herpes like virus. |
| Ano: 2001 |
URL: http://archimer.ifremer.fr/doc/2001/publication-816.pdf |
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| Bezerra,R.M.N.; Ueno,M.; Silva,M.S.; Tavares,D.Q.; Carvalho,C.R.O.; Saad,M.J.A.; Gontijo,J.A.R.. |
| Rats fed a high-fructose diet represent an animal model for insulin resistance and hypertension. We recently showed that a high-fructose diet containing vegetable oil but a normal sodium/potassium ratio induced mild insulin resistance with decreased insulin receptor substrate-1 tyrosine phosphorylation in the liver and muscle of normal rats. In the present study, we examined the mean blood pressure, serum lipid levels and insulin sensitivity by estimating in vivo insulin activity using the 15-min intravenous insulin tolerance test (ITT, 0.5 ml of 6 µg insulin, iv) followed by calculation of the rate constant for plasma glucose disappearance (Kitt) in male Wistar-Hannover rats (110-130 g) randomly divided into four diet groups: control, 1:3 sodium/potassium... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: High-fructose diet; Insulin resistance; Blood pressure; Hypertriglyceridemia; Plasma cholesterol. |
| Ano: 2001 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2001000900008 |
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| Wentz,Ivo; Bortolozzo,Fernando Pandolfo; Brandt,Guilherme; Heck,Augusto; Bennemann,Paulo Eduardo; Guidoni,Antonio Lourenço; Uemoto,Daniela Aparecida. |
| O objetivo deste estudo foi avaliar o efeito da hipertermia no dia da inseminação artificial (IA) até o 13º dia de gestação, sobre o desempenho reprodutivo de leitoas e porcas. No experimento 1, as 488 fêmeas foram divididas em dois grupos de acordo com a temperatura retal no dia da primeira inseminação artificial (IA), respectivamente, G1 = £39,5ºC (normotermia) e G2 = >39,5ºC (hipertermia). As fêmeas com hipertermia apresentaram taxas de retorno ao estro (TRE) maiores e taxas de parto (TP) e tamanho de leitegada (TL) menores (p<0,05), quando comparadas às fêmeas com normotermia. No experimento 2, as 764 fêmeas foram classificadas em quatro grupos, respectivamente, G1 = hipertermia no dia da IA; G2 = hipertermia em um dos primeiros 4 dias após a IA;... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Suínos; Temperatura corporal; Eficiência reprodutiva. |
| Ano: 2001 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782001000400015 |
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| Sundquist, W. Burt. |
| Contents: Agricultural and Applied Economics at Minnesota in 1979; Rekindling the International Focus: 1979-84; An Increase in State and Local Focus, 1984-1990; Changing Faculty and Programs, 1990-1998; Applied Economics at the Turn of the Century (1998-2000); University of Minnesota Faculty in Agricultural and Applied Economics (1979-2000); New Faculty Appointments in Agricultural and Applied Economics (1979-2000); Faculty Resignations and Retirements in Agricultural and Applied Economics (1979-2000); Recipients of Graduate Degrees with Majors in Agricultural and Applied Economics and in Applied Economics, University of Minnesota, 1980-2000; Course Offerings in Agricultural and Applied Economics, 1979-1981; Course Offerings in Agricultural and Applied... |
| Tipo: Report |
Palavras-chave: Teaching/Communication/Extension/Profession. |
| Ano: 2001 |
URL: http://purl.umn.edu/13007 |
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| Registros recuperados: 8.909 | |
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