Resgate e cultivo in vitro de embriões imaturos de tangerineira ?Cleópatra? (Citrus reshni Hort.).

A poliembrionia, um fenômeno comum a muitas espécies cítricas, limita bastante a obtenção de maior número de híbridos em programas de melhoramento genético de citros. Caracteriza-se pela presença de mais de um embrião numa mesma semente, sendo que a maioria desses embriões é de origem nucelar e dificulta a sobrevivência do indivíduo zigótico, devido à competição que ocorre entre eles.PDF. 090_11

Use of thermogravimetry analysis to quantify total volatile fraction in pine resin.

Pinus species exhibit fast growth and are good producers of wood, cellulose and resin. Brazil is the second largest producer of resin. The People?s Republic of China is the main producer with approximately 90% world?s resin production. Turpentine, volatile fraction, and rosin, solid fraction, are two major fractions or resin. The distillation process continues up to 170° C can be extracted about 95% of the total gum turpentine resin, preserving its constituents. There is little research using thermal analysis to study pine resin properties. This work involved evaporating volatile fraction of resins in an oven at 170 ºC consisted of 20 different samples from Pinus caribaea var. hondurensis and was compared with results obtained in thermal analysis to quantify the same fraction for each one. The volatile fraction in the oven (170 ºC) was from 14.69% to 24.05%. This fraction obtained through thermogravimetric analysis (TGA) was from 13.37% to 23.64%. The results demonstrate that the TGA technique is capable of accurately determining the volatile and non-volatile fractions of the resin and this technical proved to be suitable for further analyses.CBRATEC

Monitoramento agroambiental do setor sucroenergético: contribuições do sensoriamento remoto orbital para a certificação ambiental do cultivo da cana-de-açúcar.

The potential for Brazilian sugarcane ethanol production and exportation is linked, among others, to environmental sustainability and certification. The objective of this work was to present the major activities carried out within the context of the Canasat Project that can contribute to the compliance of some certification guidelines for sustainable sugarcane ethanol production. The microregion of Auriflama in the State of São Paulo, Brazil was selected as study area. Remote sensing images from TM, AWiFS, CCD and HRC sensors were used to: 1) map sugarcane crop for crop year 2009/10; 2) map sugarcane harvest practice (with and without straw burning) during crop year 2009/10; 3) sugarcane cultivation in permanent protected areas (APP) by law; 4) land use and land cover change in remanescents of native vegetation (RVN), and 5) land use and land cover change due to sugarcane expansion. The municipalities of General Salgado, Magda and São João de Iracema presented the largest amount of cultivated sugarcane in the study area. It was also observed that pasture released the largest amount of land (80%) for sugarcane expansion. The municipalities of Guzolândia, Gastão Vidigal, Floreal, Magda and Auriflama presented the highest percentages of sugarcane harvested without the practice of straw burning surpassing the goal established by the Agri-environmental Protocolo for the year of 2009. The municipalities of General Salgado and Auriflama presented the largest amount of cultivated sugarcane in APP with 1.1% and 0.4%, respectively. The municipalities of Nova Castilho and Gastão Vidigal had, respectively, 68.7 ha (8.3%), 16.1 ha (4.5%) of RVN suppressed. The applied method and the integrated analyses allowed to, preliminary, evaluate the adherence of sugarcane producers to a sustainable ethanol production, in the microregion of Auriflama, based on some proposed directives for the certification of ethanol production

Técnica do Inseto Estéril (TIE): nova tecnologia para o controle de moscas-das-frutas no Brasil; Projeto Piloto Livramento de Nossa Senhora.

Neste trabalho, relatam-se os resultados do “Projeto Piloto para Uso de Moscamed Estéril em Livramento de Nossa Senhora”, no Sudoeste da Bahia. O projeto teve como objetivo testar a efi ciência da linhagem “Viena 8” de C. capitata, nas condições do semi-árido do Nordeste do Brasil, bem como a logística de transporte e de liberação massal em campo, como uma ação pró-ativa às atividades da Bio-fábrica Moscamed Brasil