RESUMO
Sorghum is a major cereal crop in the USA. However, sorghum has been underutilized as a renewable feedstock for bioenergy. The goal of this research was to improve the bioconversion efficiency for biofuels and biobased products from processed sorghum. The main focus was to understand the relationship among "genetics-structure-function-conversion" and the key factors impacting ethanol production, as well as to develop an energy life cycle analysis model (ELCAM) to quantify and prioritize the saving potential from factors identified in this research. Genetic lines with extremely high and low ethanol fermentation efficiency and some specific attributes that may be manipulated to improve the bioconversion rate of sorghum were identified. In general, ethanol yield increased as starch content increased. However, no linear relationship between starch content and fermentation efficiency was found. Key factors affecting the ethanol fermentation efficiency of sorghum include protein digestibility, level of extractable proteins, protein and starch interaction, mash viscosity, amount of phenolic compounds, ratio of amylose to amylopectin, and formation of amylose-lipid complexes in the mash. A platform ELCAM with a base case showed a positive net energy value (NEV) = 25,500 Btu/gal EtOH. ELCAM cases were used to identify factors that most impact sorghum use. For example, a yield increase of 40 bu/ac resulted in NEV increasing from 7 million to 12 million Btu/ac. An 8% increase in starch provided an incremental 1.2 million Btu/ac.
Assuntos
Ração Animal/análise , Fontes Geradoras de Energia , Etanol/metabolismo , Sorghum/metabolismo , Fontes de Energia Bioelétrica , Biotransformação , Fermentação , Hidrólise , Modelos Biológicos , Sorghum/química , Sorghum/citologia , Amido/química , Amido/metabolismo , ViscosidadeRESUMO
There are no reported education programs specifically focusing on the needs of rural health workers in the area of violence against women. The most commonly reported contact sought by women experiencing injuries and health problems associated with violence and abuse is with health workers. Women report a failure by health workers to make direct enquires, which may be due to their lack of education and confidence in responding to these issues. A convenience sample of 60 community-based rural health workers from a range of occupations and settings within the Wide Bay Health Region, Queensland, participated in the evaluation of a self-paced, distance education package on violence against women. The package contained seven modules. These included written and audio tape material, and activities that together formed a community development approach to addressing the needs in the participants' local community. Participants were given a mentor and teleconference support during the 8 weeks allocated to complete the package. A pre- and post-course evaluation, containing quantitative and qualitative data, was completed. Analysis of the quantitative data identified significant changes in participants' knowledge, and the qualitative data highlighted an increased sense of confidence in assisting women, forming support networks and using resources more effectively. Participants reported the most useful aspects of the package were: (i) modular- and user-friendly format; (ii) flexible, practical, health-focused content; and (iii) real world examples.