1,721,002 research outputs found
Mycena lamprocephala, a new luminescent species from the Brazilian Amazon
No full textSoares, Célia C.B., Cabral, Tiara S., Vargas-Isla, Ruby, Cardoso, Juli S., Rodrigues, Doriane P., Ishikawa, Noemia K., Oliveira, Jadson J.S. (2024): Mycena lamprocephala, a new luminescent species from the Brazilian Amazon. Phytotaxa 634 (3): 187-203, DOI: 10.11646/phytotaxa.634.3.1, URL: https://phytotaxa.mapress.com/pt/article/download/phytotaxa.634.3.1/5146
Triagem de Macrofungos de Ocorrência na Amazônia Produtores de Compostos Antimicrobianos
Full text linkO Efeito da Temperatura No Crescimento Micelial e Atividade Antimicrobiana de Panus Cf. Strigellus
Full text linkEfeito da Exclusão de Vitaminas do Meio Completo de Pontecorvo (mc) No Crescimento Micelial e Produção de Metabólitos Antimicrobianos por Flammulina Velutipes
Full text linkCurva de Crescimento Micelial e Atividade Antimicrobiana de Panus Strigellus, Um Cogumelo Comestível
Full text linkResíduos Regionais na Elaboração de Meios para Crescimento Micelial de Cogumelos Amazônicos
Full text linkCultivo micelial in vitro e elaboração de “semente-inóculo” de Lentinus strigosus, um cogumelo comestível isolado na Amazônia
Full text linkThe Amazonas State presents favorable scenery for the development of thefungiculture, because gathers the native diversity of species of edible mushrooms and
abundantly substrates lignocellulosics. However, the protocols of cultivation are usually
described for species of temperate climate habitat, being necessary the development
of protocols for species of tropical climate. The specie Lentinus strigosus (Schwein.) Fr.
(=Panus rudis Fr.) has a wide world distribution presenting several ecotypes. The
edibility of this specie has been reported in ethnomycology studies of indigenous
groups in the Amazon. However, your potential production in commercial scale has still
been a little explored. In this study, reported the optimum conditions in vitro of mycelial
growth of L. strigosus. The isolated presented characteristics of thermophile
filamentous mushroom, with growth in temperatures from 25 to 45°C, being the
optimum growth temperature, 35°C. This temperature is an important advantage for the
development of the fungiculture in the tropics, since it is a common temperature for the
region. In relation to the substrates for spawn preparation, in a first phase, the mycelial
growth of L. strigosus was evaluated in based on sawdust formulations of 11 forestry
regional species: Hymenolobium petraeum Ducke (Angelim pedra), Hura crepitans L.
(Assacu), Bertholletia excelsa H.B.K. (Castanheira), Cedrela odorata L. (Cedro),
Bombacopsis quinata (Jacq.) Dugand. (Cedro doce), Hymenaea courbaril L. (Jatobá),
Ocotea cymbarum Kunth (Louro canela), Simarouba amara Aubl. (Marupá), Astronium
lecointei Ducke (Muiracatiara), Aniba rosaeodora Ducke (Pau rosa) and Caryocar sp.
(Piquiarana) and Eucalyptus sp. in comparison, main substratum used in the
fungiculture of the South and Southeast of Brazil and Quercus acutissima Carr., very
used in Asia. The sawdusts were supplemented with 20% (w/w) of rice bran. The
substrates formulated with sawdust of B. quinata and S. amara they promoted higher
mycelial growth (p<0.05). In the second phase, was evaluated the mycelial growth in
sawdust of S. amara supplemented with seven different nitrogen sources (20% w/w):
rice bran, soy extract, beer yeast, passion fruit shell flour, soy fiber, wheat fiber and
wheat germ. As control was utilized pure sawdust. All the supplements favored in
different levels the mycelial growth of L. strigosus. Bags and flasks of polypropylene
were tested for spawn production and utilizing sawdust of S. amara, H. petraeum and
A. lecointei supplemented with rice bran, after 25 days of inoculation the substrates
were totally colonized by L. strigosus in all the packings tested. For choice of the
packing other criteria should be considered aspects as costs of the packings; time of
colonization; transport viability and feasibility of mycelial inoculation on the substratum.
By these results, the spawn of L. strigosus was elaborated with success, being used
sawdust of S. amara supplemented with 20% (w/w) of rice bran, at 35°C during 25
days, in the dark, in three packings with different characteristics.O Estado do Amazonas apresenta um cenário favorável para o
desenvolvimento da fungicultura, pois reúne a diversidade nativa de espécies de
cogumelos comestíveis e substratos lignocelulósicos em abundância. Entretanto, os
protocolos de cultivo geralmente são descritos para espécies de clima temperado,
sendo necessário o desenvolvimento de protocolos para as espécies de clima tropical.
A espécie Lentinus strigosus (Schwein.) Fr. (=Panus rudis Fr.) tem uma ampla
distribuição mundial apresentando vários ecotipos. A comestibilidade desta espécie
tem sido reportada em estudos etnomicológicos de povos indígenas da Amazônia. No
entanto, o seu potencial para a produção em escala comercial ainda tem sido pouco
explorada. Neste trabalho, reportam-se as condições ótimas de crescimento micelial,
in vitro, de L. strigosus. O isolado apresentou características de fungo filamentoso
termófilo, com crescimento em temperaturas de 25 a 45ºC, sendo a temperatura de
crescimento ótimo, 35ºC. Esta temperatura é uma importante vantagem para o
desenvolvimento da fungicultura nos trópicos, uma vez que é uma temperatura comum
na região. Quanto aos substratos para elaboração de “semente-inóculo”, em uma
primeira etapa, avaliou-se o crescimento micelial de L. strigosus em formulações a
base de serragens de 11 espécies florestais regionais: Hymenolobium petraeum
Ducke (Angelim pedra), Hura crepitans L. (Assacu), Bertholletia excelsa H.B.K.
(Castanheira), Cedrela odorata L. (Cedro), Bombacopsis quinata (Jacq.) Dugand.
(Cedro doce), Hymenaea courbaril L. (Jatobá), Ocotea cymbarum Kunth (Louro
canela), Simarouba amara Aubl. (Marupá), Astronium lecointei Ducke (Muiracatiara),
Aniba rosaeodora Ducke (Pau rosa) e Caryocar sp. (Piquiarana) em comparação com
Eucalyptus sp., principal substrato utilizado na fungicultura do Sul e Sudeste do Brasil
e Quercus acutissima Carr., muito utilizado na Ásia. As serragens foram
suplementadas com 20% (w/w) de farelo de arroz. Os substratos a base de serragem
de B. quinata e S. amara promoveram maiores crescimentos miceliais (p<0,05). Em
uma segunda etapa, avaliou-se o crescimento micelial em serragem de S. amara
suplementada com sete diferentes fontes de nitrogênio (20% w/w): farelo de arroz,
extrato de soja, levedura de cerveja, farinha da casca de maracujá, fibra de soja, fibra
de trigo e gérmen de trigo. Como controle utilizou-se, serragem pura. Todas as
suplementações favoreceram em diferentes níveis o crescimento micelial de L.
strigosus. Para a produção de “semente-inóculo” foram testados sacos e frascos de
polipropileno utilizando serragens de S. amara, H. petraeum e A. lecointei
suplementadas com farelo de arroz, após 25 dias de inoculação os substratos estavam
totalmente colonizados por L. strigosus em todas as embalagens testadas, para a
escolha da embalagem foram considerados aspectos como custos das embalagens;
tempo de colonização; viabilidade de transporte e praticidade de inoculação do micélio
no substrato. Mediante estes resultados, a “semente-inóculo” de L. strigosus foi
elaborada com sucesso, utilizando-se serragem de S. amara suplementado com 20%
(w/w) de farelo de arroz, a 35ºC por 25 dias, no escuro, em três embalagens com
características diferentes
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
- …
