Duyệt
Những tài liệu tải lên gần đây
Đang hiển thị 1 - 5 của tổng số 270 kết quả
- CHEMICAL CONSTITUENTS AND PHYSICAL PROPERTIES OF DIFFERENT PRIMING OF SEVEN GENOTYPES OF ORIENTAL TOBACCO(2021) Hevi Rahim KarimThis investigation was carried out at Zrguez Tobacco Station in Sulaimani governorate during the summer season of 2010, to estimate the chemical constituents and some physical properties of seven oriental tobacco genotypes (Nicotiana tabacum L.). The seven oriental tobacco genotypes, namely; Gullsur, Gullspi, Madara, Pazarjik, Bulgari, Line 10 and Line 18 which were grown in Zrguez Tobacco Station. The product sun cured and stored in the warehouse for a long time to induce natural fermentation and aging. The leaves from three primings were used to determine chemical constituents, which were (the percentage of reducing sugar, nicotine content, total nitrogen, C/N ratio, total ash, volatile oil, potassium content and chloride content), and estimating of some physical properties which were (leaf area, leaf thickness, weight/unit area and strip yield). The factorial experiment was laid out according to Completely Randomized Design (CRD), with three replicates. Tobacco leaves from lower, middle and upper primings were prepared to study the differences between genotypes, primings, and their combinations in some chemical constituents and physical properties.
- Characteristics of Burley Tobacco Farms(1988) Annette L. ClausonBurley tobacco farms surveyed produced an average of 2.3 acres of tobacco in 1984, the most recent data available, on an average of 122 acres of farmland operated. A labor-intensive crop, burley tobacco (a cigarette tobacco) required an average of 240 hours of labor per acre or 13 hours per 100 pounds to produce the 1984 crop. Most farms relied on nonfarm sources to supplement their income. Net worth for burley tobacco producers averaged $130,715 in 1984, substantially below the $322,732 for all U.S. farm producers. Their average farm debt was about a third less than for all U.S. farm producers. The data analyzed in this report are from the U.S. Department of Agriculture's 1984 Farm Costs and Returns Survey.
- A Review of the Literature on Catalytic Biomass Tar Destruction(2002-12) D. DaytonBiomass thermochemical conversion for the production of fuels, chemicals, and combined heat and power has a number of realizable social, political, and economic benefits. In the biorefinery concept, it is possible to utilize biomass to generate a number of product and revenue streams that could revitalize rural economies, increase national security by reducing the dependence on foreign oil imports, and improve the global environment by reducing fossil fuel emissions, including greenhouse gases and oxides of nitrogen and sulfur. Biomass gasification is a developing technology that can be used to achieve an increased use of biomass by generating a product gas rich in H2 and CO. Integrated biomass gasification combined cycles can then be used to generate electricity in a gas turbine or a fuel cell at higher efficiencies than direct biomass combustion. Conditioning and upgrading the biomass gasification product gas can make it a suitable feed for methanol or Fischer-Tropsch liquid synthesis. Additional conditioning can produce an essentially pure hydrogen product gas for transportation, chemical production, or electricity generation in fuel cells.