Xem 1-13 trên 13 kết quả Temperature alkaline
  • Tham khảo sách 'steam generator systems: operational reliability and efficiency_1', kỹ thuật - công nghệ, năng lượng phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả

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  • The book is intended for practical engineers, researchers, students and other people dealing with the reviewed problems. We hope that the presented book will be beneficial to all readers and initiate further inquiry and development with aspiration for better future. The authors from different countries all over the world (Germany, France, Italy, Japan, Slovenia, Indonesia, Belgium, Romania, Lithuania, Russia, Spain, Sweden, Korea and Ukraine) prepared chapters for this book. Such a broad geography indicates a high significance of considered subjects....

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  • The chemical composition of bamboo is similar to that of wood. Table 2-2 shows the chemical composition of bamboo [Higuchi 1957]. The main constituents of bamboo culms are cellulose, hemi-cellulose and lignin, which amount to over 90% of the total mass. The minor constituents of bamboo are resins, tannins, waxes and inorganic salts. Compared with wood, however, bamboo has higher alkaline extractives, ash and silica contents [Tomalang et al. 1980; Chen et al. 1985]. Yusoff et al.

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  • Under a BAU scenario, the stock of greenhouse gases could more than treble by the end of the century, giving at least a 50% risk of exceeding 5°C global average temperature change during the following decades. This would take humans into unknown territory. An illustration of the scale of such an increase is that we are now only around 5°C warmer than in the last ice age. Such changes would transform the physical geography of the world. A radical change in the physical geography of the world must have powerful implications for the...

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  • in addition to investing in new maternal and neonatal health tools and technologies, we aim to adapt interventions used in referral-level facilities so they can be used in homes, communities, and first-level clinics. Misoprostol’s availability in a pill form that does not require injection or refrigeration makes it particularly promising for use by midwives and other frontline workers in home, community, and first-level clinic settings. oxytocin in Uniject™ is another treatment tool being investigated for postpartum hemorrhage.

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  • Introduction: Background The vast majority of research into solid-state polymer electrolytes for low-temperature (o200 1C) fuel cells has focused on proton-exchange membrane (PEM) fuel cells (PEMFCs). Recently, there has been interest in the application of the analogous anion-exchange membranes (AEMs), in alkaline forms, in low-temperature fuel cells (Figure 1).

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  • 13 Biodiesel Production Technologies and Substrates Arumugam Sakunthalai Ramadhas contents Abstract.................................................................................................................. 183 13.1 Introduction ................................................................................................ 184 13.2 Vegetable Oil Characterization .................................................................. 184 13.3 Alkaline Catalyst Transesterification ......................................................... 186 13.3.1 Alcohol to Oil Molar Ratio ..............

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  • High cooking temperature and thus high pressure is needed when alcohols are used as cooking chemicals. Methanol has been used as an additive in kraft, sulphite and soda pulping. However, the use of methanol may be hazardous, since methanol is a highly flammable and toxic chemical. Demonstration plants using the alkaline sulphite-anthraquinone-methanol process (ASAM) (Patt & Kordsachia 1986, Khristova et al. 2002, Patt et al. 1999) and the soda pulping method with methanol (Organocell) (Schroeter & Dahlmann 1991) have been built.

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  • The spring wheat straws used in the experiments were cultivated in Jokioinen, Finland, in summer 2006 (06Straw), 2007 (07Straw) and 2008 (08Straw). The wheat varieties were Kruunu in 2006, Marble in 2007 and Kruunu in 2008. The wheat was grown on a sandy clay field in Jokioinen, Finland (60°49'12"N, 23°28'12"E). The 06straw was used in the hot water treatment temperature optimisation and the 07straw in the mechanical refining experiments. 06Straw and 07Straw were used in the optimisation of alkaline peroxide bleaching.

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  • INEGAR, or dilute acetic acid, is produced by a process of fermentation from certain vegetable substances. After alcoholic fermentation has taken place there follows, under suitable conditions, a further decomposition, by means of which the alcohol is converted into a more highly oxidized body, acetic acid, with water as a byproduct.[1] [Pg 4] These conditions require that the liquid shall contain alcohol, nitrogenous matter, and alkaline salts in certain proportions, and that it shall be in contact with the air, at a suitable temperature, for a sufficient length of time. ...

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  • Combustion units (process furnaces, steam boilers and gas turbines) give rise to emissions of carbon dioxide, nitrogen oxides, sulphur dioxide and particulates. Nitrogen oxide emissions are most commonly reduced by combustion modifications that reduce temperatures and hence the formation of thermal NOx. The techniques include low NOx burners, flue gas recirculation, and reduced pre-heat. Nitrogen oxides can also be removed after they have formed by reduction to nitrogen using Selective Non Catalytic Reduction (SNCR) or Selective Catalytic Reduction (SCR). Water pollutant control.

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  • Effect of sodium nitrite on the carbon steel corrosion inhibition in the aerated neutral (pH 7) and alkaline (pH 11) water solutions at temperatures from 30o C to 140o C has been investigated by mass loss, potentiodynamic polarization and electrochemical impedance spectroscopy methods. Sodium nitrite was added in concentrations: 200, 350, 500, 750, 1000, 1500 and 2000 ppm by mass.

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  • (BQ) Part 2 book "The microbiology of anaerobic digesters" presents the following contents: Biogas, introduction to operational conditions, start up, sludge feed, retention times, temperature, nutrients, alkalinity and pH, upsets and unstable digesters, foam and scum production and accumulation, types of anaerobic digesters...

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