Raquel Rejane Bonato Negrelle

Anatomia foliar comparativa de nove espécies do gênero Piper (Piperaceae)

The species of Piper are of great medical interest. They, however, represent considerable taxonomic challenge, probably due to the small size of floral parts. Therefore, the external morphology of the leaf has been used as diagnostic features in the taxonomy of the group. However, there are few anatomical studies on species of this genus. In this study, the leaves of nine species were compared anatomically: Piper aduncum Vell., P. cernuum Vell., P. dilatatum Rich, P. gaudichaudianum Kunth, P. glabratum Kunth, P. hispidinervum C. DC., P. lindbergii C. DC., P. solmsianum C. DC. and P. umbellatum Jacq. The objective was to evaluate the potential of anatomical characters for species separation. Most species studied have the epidermis of the lamina consists of rectangular and rounded cells. Subepidermal layers occur on both sides of the lamina, except in P. aduncum, P. cernuum and P. hispidinervum. All species are hypostomatic, except P. hispidinervum. The mesophyll is dorsiventral in most species, while in P. solmsianum and P. umbellatum, the mesophyll is homogeneous. The number of layers of palisade and spongy tissue is variable. Also there are variations in the number and size of vascular bundles. In general, secreting cells, idioblasts, and glandular trichomes, lipids, phenolic compounds and starch are present. Cluster analysis identified three distinct groups of species based on anatomical features studied.

Aplicação de análogo de brassinosteroide (Biobras 16®) sobre a germinação e crescimento in vitro de embriões zigóticos e aclimatização de plântulas de bocaiuva

The results of an experimental research evaluating the in vitro growth of zygotic embryos and acclimatization of bocaiuva (Acrocomia aculeata) grown under different concentrations (0.00, 0.001, 0.005, 0.01, 0.05, 0.1, 0.5 and 1mg. L-1) of a brassinosteroid analogue (Biobras 16®) are presented. The objective was to determine whether the application of 16 Biobras ® positively affects the germination of zygotic embryos of Acrocomia aculeata and promotes the growth and development of seedlings and thereby affects the number of normal seedlings. The application of Biobras 16® did not promote an increase in the percentage of germination but stimulated the formation of normal seedlings. The positive effect of Biobras 16® was observed only in the first phase, not observed in other growth stages evaluated.

Armazenagem de chás no setor supermercadista

This paper presents the results of a survey conducted in the supermarket sector to evaluate the quality and adequacy of tea packaging and storage areas, considering the current legislation. In addition to providing a general view of tea storage practices, this survey aimed to generate a basic instrument to develop sanitary inspection in this market sector. The data were collected in April 2001 during visits to six supermarkets, when their dry goods department and attached warehouse were inspected. In addition, interviews were held with staff responsible for the aforementioned sectors to clarify and check the storage practices. The overall quality of tea storage was classified as good at four stores and excellent at the other two stores. The warehouses presented good (3) to regular (1) quality. A detailed analysis of the questionnaire indicated that the most frequent problem at the supermarkets and warehouses involved the lack of proper temperature and humidity control (none of the supermarkets had controlled environments). Another frequently mentioned problem had to do with the minimum spacing required. Less frequently reported problems were inadequate cleaning and lighting of storage areas, proximity to toxic products, and type and quality of stacking.

Attalea phalerata MART. EX SPRENG.: ASPECTOS BOTÂNICOS, ECOLÓGICOS, ETNOBOTÂNICOS E AGRONÔMICOS

Attalea phalerata is a neotropical species with distribution restricted to the west part of South America, found in Colombia, Peru, Bolivia, Brazil and Paraguay. This species isconsidered with high economic potential, due to the diversity of popular uses associated to it. In spite of not being used in all its potentiality, this palm tree represents substantial resource for the traditional communities distributed in its area of natural occurrence. Aiming to highlight the importance of Attalea phalerata as source of natural products, a review on botanical, ecological, ethnobotanical and agronomical aspects of this species is presented.

Effectiveness of Asteraceae extracts on Trichostrongylidae eggs development in sheep

Data on in vitro evaluation of extracts of three species of the Asteraceae family on the development of Trichostrongylidae eggs in sheep are presented. Egg hatchability was tested using herbal extracts prepared in a Soxhlet extractor, and using hydrolate prepared by means of hydrodistillation. The laboratory tests showed that the ethanol extract from flowers of the species Aster lanceolatus presented high activity against Trichostrongylidae eggs development in sheep, inhibiting larva formation by 91% within 48 hours, and maintaining similar rates after 72 hours.

The Impact of Traditional Silvopastoral System on the Mixed Ombrophilous Forest Remnants

The results of an evaluation of the impact of traditional silvopastoral system on floristic and phytosociology of the Mixed Ombrophilous Forest (MOF) remnants, named caívas, in the North Plateau of Santa Catarina, South of Brazil are shown here to contribute to a better understanding of the impact of human activities on natural environments,. There was significant heterogeneity in floristic and structural aspects among the remnants. They exhibited high floristic integrity, with the presence of species typically registered in MOF. On the other hand, the incidence of exotic species was inexpressive. The predominance of smaller plant individuals than expected for adults of the species, combined with the predominance of secondary and pioneer species indicate the occurrence of repeated disturbances over the years. It is urgent to identify technological alternatives to enable appropriate foraging and increase in livestock production, ensuring economic and social sustainability with less environmental impact.

Diagnóstico das Condições Higiênico-Sanitárias do Sistema de Beneficiamento Pós-Colheita do Gengibre “In Natura” no Litoral Paranaense, Brasil

Para subsidiar a oferta de produto de melhor qualidade ao mercado consumidor, avaliaram-se as condicoes higienico-sanitarias dos estabelecimentos produtores, do processo de beneficiamento pos-colheita (lavagem, limpeza, secagem e embalagem) e as condicoes de manipulacao do gengibre “in natura”, no litoral paranaense. Os resultados obtidos foram confrontados com a legislacao brasileira vigente. Em geral, as condicoes de higiene e limpeza foram consideradas precarias, determinando alta potencialidade de contaminacao do gengibre com agentes, que poderiam colocar em risco a saude do consumidor. Os problemas encontrados poderiam ser minimizados, por meio de sistematico controle de qualidade e programas de educacao sanitaria. Nesta perspectiva, algumas propostas e recomendacoes sao apresentadas.