Fungos filamentosos de interesse em agroenergia: avaliação de diferentes metodologias de preservação do fungo Aspergillus niger.

bitstream/item/84032/1/BPD37-2012.pd

Strong Ramsey Games in Unbounded Time

For two graphs $B$ and $H$ the strong Ramsey game $\mathcal{R}(B,H)$ on the board $B$ and with target $H$ is played as follows. Two players alternately claim edges of $B$. The first player to build a copy of $H$ wins. If none of the players win, the game is declared a draw. A notorious open question of Beck asks whether the first player has a winning strategy in $\mathcal{R}(K_n,K_k)$ in bounded time as $n\rightarrow\infty$. Surprisingly, in a recent paper Hefetz et al. constructed a $5$-uniform hypergraph $\mathcal{H}$ for which they proved that the first player does not have a winning strategy in $\mathcal{R}(K_n^{(5)},\mathcal{H})$ in bounded time. They naturally ask whether the same result holds for graphs. In this paper we make further progress in decreasing the rank. In our first result, we construct a graph $G$ (in fact $G=K_6\setminus K_4$) and prove that the first player does not have a winning strategy in $\mathcal{R}(K_n \sqcup K_n,G)$ in bounded time. As an application of this result we deduce our second result in which we construct a $4$-uniform hypergraph $G'$ and prove that the first player does not have a winning strategy in $\mathcal{R}(K_n^{(4)},G')$ in bounded time. This improves the result in the paper above. An equivalent formulation of our first result is that the game $\mathcal{R}(K_\omega\sqcup K_\omega,G)$ is a draw. Another reason for interest on the board $K_\omega\sqcup K_\omega$ is a folklore result that the disjoint union of two finite positional games both of which are first player wins is also a first player win. An amusing corollary of our first result is that at least one of the following two natural statements is false: (1) for every graph $H$, $\mathcal{R}(K_\omega,H)$ is a first player win; (2) for every graph $H$ if $\mathcal{R}(K_\omega,H)$ is a first player win, then $\mathcal{R}(K_\omega\sqcup K_\omega,H)$ is also a first player win.Comment: 18 pages, 46 figures; changes: fully reworked presentatio

Nitrogen allocation to offspring and milk production in a capital breeder

Nitrogen (N) is a limiting nutrient for many herbivores, especially when plant availability and N content are low during the period of maternal investment, which is common for arctic ungulates. We used natural abundance of N isotopes to quantify allocation of maternal nitrogen to neonatal calves and milk in wild migratory caribou (Rangifer tarandus). We contrasted female-calf pairs from two herds in northern Quebec/Labrador, Canada: Rivière-George herd (RG; low population size with heavy calves) and the Rivière-aux-Feuilles herd (RAF; high population size and small calves). We assessed whether females of both herds relied on body protein or dietary N to produce the neonatal calf and milk at calving and weaning. Female caribou of both herds relied mostly on body N for fetal development. RAF females allocated less body N to calves than did RG females (92% vs. 95% of calf N), which was consistent with the production of calves that were 8% smaller in RAF than in RG. Allocation of body N to milk was also high for both herds, similar at calving for RAF and RG females (88% vs. 91% of milk N, respectively), but lower in RAF than RG females (95% vs. 99% of milk N) at weaning, which was consistent with a small but significantly greater reliance on dietary N supplies to support milk production at weaning. Female caribou used body protein stores to ensure a constant supply of N for fetal growth and milk production that minimized the effects of trophic mismatches on reproduction. The combination of migration and capital investment may therefore allow females to produce calves and attenuate the effects of both temporal and spatial mismatches between vegetation green-up and calf growth, which ultimately would reduce trophic feedbacks on population growth. Our data suggest that small changes in maternal allocation of proteins over the long period of gestation produce significant changes in calf mass as females respond to changes in resources that accompany changes in the size and distribution of the population

Instruções para o cultivo da acerola.

bitstream/item/44461/1/CPATC-DOCUMENTOS-6-INSTRUCOES-PARA-O-CULTIVO-DA-ACEROLA-FL-13124.pd

Probing the time dependence of dark energy

A new method to investigate a possible time-dependence of the dark energy equation of state $w$ is proposed. We apply this methodology to two of the most recent data sets of type Ia supernova (Union2 and SDSS) and the baryon acoustic oscillation peak at $z = 0.35$. For some combinations of these data, we show that there is a clear departure from the standard $\Lambda$CDM model at intermediary redshifts, although a non-evolving dark energy component ($dw/dz = 0$) cannot be ruled out by these data. The approach developed here may be useful to probe a possible evolving dark energy component when applied to upcoming observational data.Comment: 6 pages, 3 figures, LaTe

Ocorrência de Sclerotium rolfsii em grão de bico e lentilha no Planalto Central do Brasil.

O objetivo deste trabalho foi determinar a etiologia de podridão de colo e raízes em plantas de grão de bico e lentilha recebidas no Laboratório de Fitopatologia da Embrapa Hortaliças para fins de diagnose.Resumo 1079

Changes in the circumscription of Deprea (Physalideae, Solanaceae): Thirty two new combinations

According to the latest phylogenetic and cytogenetic results, Larnax and Deprea should be merged in order to form a natural group. Consequently, we propose 32 combinations of Larnax species names under Deprea: D. abra-patriciae (S.Leiva & Barboza) S.Leiva & Deanna, comb. nov., D. altomayoensis (S.Leiva & Quip.) Barboza & Deanna, comb. nov., D. andersonii (N.W.Sawyer) Deanna & S.Leiva, comb. nov., D. bongaraensis (S.Leiva) Deanna & Barboza, comb. nov., D. chotanae (S.Leiva, Pereyra & Barboza) S.Leiva, comb. nov., D. darcyana (N.W.Sawyer) Barboza & S.Leiva, comb. nov., D. dilloniana (S.Leiva, Quip. & N.W.Sawyer) Barboza, comb. nov., D. grandiflora (N.W.Sawyer & S.Leiva) Deanna & Barboza, comb. nov., D. harlingiana (Hunz. & Barboza) S.Leiva & Deanna, comb nov., D. hawkesii (Hunz.) Deanna, comb. nov., D. kann-rasmussenii (S.Leiva & Quip.) S.Leiva & Barboza, comb. nov., D. longipedunculata (S.Leiva, E.Rodr. & J.Campos) Barboza, comb. nov., D. lutea (S.Leiva) Deanna, comb. nov., D. macasiana (Deanna, S.Leiva & Barboza) Barboza, comb. nov., D. maculatifolia (E.Rodr. & S.Leiva) S. Leiva, comb. nov., D. nieva (S.Leiva & N.W.Sawyer) Barboza & Deanna, comb. nov., D. parviflora (N.W.Sawyer & S.Leiva) S.Leiva, comb. nov., D. pedrazae (S.Leiva & Barboza) Deanna & S.Leiva, comb. nov., D. peruviana (Zahlbr.) S.Leiva & Barboza, comb. nov., D. pilosa (S.Leiva, E.Rodr. & J.Campos) Deanna, comb. nov., D. pomacochaensis (S.Leiva) Barboza, comb. nov., D. psilophyta (N.W.Sawyer) S.Leiva & Deanna, comb. nov., D. pumila (S.Leiva, Barboza & Deanna) S.Leiva, comb. nov., D. purpurea (S.Leiva) Barboza & S.Leiva, comb. nov., D. purpureocarpa (S.Leiva, Deanna & Barboza) Deanna, comb. nov., D. sachapapa (Hunz.) S.Leiva & Deanna, comb. nov., D. sagasteguii (S.Leiva, Quip. & N. W.Sawyer) Barboza, comb. nov., D. sawyeriana (S.Leiva, E.Rodr. & J.Campos) S.Leiva, comb. nov., D. schjellerupiae (S.Leiva & Quip.) Barboza & Deanna, comb. nov., D.  steyermarkii (Hunz.) S.Leiva & Barboza, comb. nov., D. toledoana (Barboza & S.Leiva) Barboza, comb. nov., and D. vasquezii (S.Leiva, E.Rodr. & J.Campos) Deanna, comb. nov.Fil: Deanna, Rocío. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto Multidisciplinario de Biología Vegetal. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Instituto Multidisciplinario de Biología Vegetal; ArgentinaFil: Leiva González, Segundo. Universidad Privada Atenor Orrego. Museo de Historia Natural; PerúFil: Barboza, Gloria Estela. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto Multidisciplinario de Biología Vegetal. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Instituto Multidisciplinario de Biología Vegetal; Argentin