Tìm thấy 12+ kết quả cho từ khóa "Ethanol concentration"
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EFFECT OF ETHANOL TREATMENT ON MORPHOLOGICAL AND TECHNICAL PROPERTIES OF CORN STARCH. Ethanol concentration is one of the important influencing factors to form porous pores from the surface to inside starch granules. In this study, the effect of ethanol concentration on technical properties of starch treated by solvents were investigated.. Corn starch was treated by solvent at 8% concentration.
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However, when the amounts of ethanol concentration were 70 and 80% (v/v), the total polyphenol content declined rapidly.. Figure 1: Influences of ethanol concentration. Effect of solvent-material ratio on the polyphenol content. Solvent – material ratio effect to the extraction of polyphenol in green tea leaves was given in Fig.2 when ethanol concentration, extraction temperature and time were 60% v/v, 50 o C and 30 minutes, respectively.
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Sensor response value increases with the increment of ethanol concentration. Figure 8d shows sensor response of samples against different relative humidity concentrations at 200 °C. WT-1 sample exhibited the highest sensor response at every concentration of relative humidity.. The investigation of concentration dependence of sensor response demonstrate that all sensors are most sensitive against ethanol molecules at optimal operation temperature.
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The effect of ethanol concentration in reagent solutions on nanodimensional MnO 2 formation. EP 1 : Percentage concentration of ethanol in MnSO 4 solution and. EP 2 : Percentage concentration of ethanol in KMnO 4 solution. There were two areas where effect of nanodimensional MnO 2. TEM image of nanodimensional MnO 2. Nanodimensional MnO 2 adsorbent. Figure 2 and 3 described the surface of denaturated laterite before and after coating of MnO 2 particles..
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Figure 3A to 3F showed the effects by the pair of factor: extraction time – solvent /solid ratio, extraction time – pH, extraction time – ethanol concentration, solvent /solid ratio– pH, solvent /solid ratio – ethanol concentration, pH - ethanol concentration on content of crude total phytoestrogens extract.
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(b) ethanol concentration and extraction. (c) ethanol concentration and solvent/material ratio. Design-Expert® Software Factor Coding: Actual Total polyphenol content. X1 = A: Ethanol concentration X2 = B: Sonication time Actual Factors C: Extraction temperature = 45 D: Material size = 0.75 E: Solvent/material ratio = 4.5. Total polyphenol content. A: Ethanol concentration. B: Sonication time (min). 40 Total polyphenol content. X1: A: Ethanol concentration. X2: B: Sonication time (min) 25.
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micrograph (SEM) of TiO2 nanowires at 7500C and ethanol concentration of 25sccm 60 Figure 3.8 Scanning electron micrograph (SEM) of TiO2 nanowires at 7500C and ethanol concentration of 30sccm 61 Figure 3.9 Scanning electron micrograph (SEM) of TiO2 nanowires at 8500C and ethanol concentration of 20sccm 62 Figure 3.10 Scanning electron micrograph (SEM) of TiO2 nanowires at 8500C and ethanol concentration of 50sccm 63 Figure 3.11 Scanning electron micrograph (SEM) of TiO2 nanowires at 8500C and ethanol
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It was due to the low concentration of substrates and high concentration of some toxic metabolites (ethanol and other higher alcohols) produced by yeast in the medium. It can be confirmed that the chosen moment – the 108 th fermenting hour for fresh wort supplementation was reasonable.. In the fed-batch cultures, fresh wort supplementation increased the nutrient contents and decreased ethanol concentration in the fermenting medium.
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Figure 3: Contour and 3D surface plots showing the effect of extraction time, ethanol concentration, and extraction temperature on the total flavonoids content (TFC) from Houttuynia cordata Thunb. The red dots at the middle of the plots indicate center points.. Table 5: MS data of six flavonoids identified in fish mint extract.
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The basis of the study was investigation of the effects of important parameters such as extraction temperature, extraction time, solvent concentration (ethanol in water), and solvent-to-solid ratio on extraction of marigold. The ethanol concentration was the most significant operating factor in the MAE of antioxidants from marigold.
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Effect of ethanol extraction concentration on the apparent piceatannol content of passion fruit seeds. The effects of ethanol concentration in the extraction medium on phenolic compounds (in general) and on piceatannol (in particular) yields have been observed in various studies.. Lai et al.
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Our conclusion from this finding was as follows: Ethanol at concentration of below 50% did not have significant effect on the degradation and stability of vit. however, ethanol concentration above 50% hindered the yellow color development, and no accurate measurement of vit. D 2 retention at different pH and thermal treatment at 75 ℃ incubated at different time points in the dark.. In the present study, we investigated the role of bioflavanol quercetin in stabilizing vit.
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Concentration of ethanol (mM). Concentration of ethanol (mM) Figure 8. The calibration curve of the ethanol biosensor. ranging between 1.0 µ M and 10.0 µ M ethanol (at 0.1 M, pH 7.0 phosphate buffer, 25 ◦ C).. The calibration curve of the ethanol biosensor ranging between 0.01 mM and 0.1 mM ethanol (at 0.1 M, pH 7.0 phosphate buffer, 25 ◦ C).. Operational stability and storage stability of the ethanol biosensor.
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The dose of ethanol and the duration of administration were chosen to achieve a target concentration of blood ethanol of 100–150 mg/dL to limit any major metabolic and hemodynamic changes during infusion and to achieve elimination of blood ethanol within 10 – 12 h..
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In order to obtain a large quantity of pure ethanol, the quantity of maize cobs and groundnut shells were increased using the same ratio (3:1). Acid hydrolysis of maize cobs and groundnut shells at different acid concentrations and at ambient temperatures showed an increase in glucose concentration with time (Tables 1 and 2). The concentration of glucose was higher for both biomass when the concentration of 4.5M H 2 SO 4 was used..
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The results in figure 2 showed that the saponin content obtained was the lowest (3.96 mg/g) when the concentration of ethanol is 50%.. When the concentration of ethanol increases, the saponin content also increases and at the 70% concentration of ethanol the saponin content is the highest (reached 12.58 mg/g).. ethanol is the most suitable concentration for extraction of saponins from Celastrus hindsii Benth.. Cheng et al.
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Theoretical stress-concentration factor Nominal normal stress. Similarly, we can also estimate the highly localized amplification of shear stress in the vicinity of a geometric stress concentration,. Theoretical stress-concentration factor for shear Nominal shear stress. The nominal stress of the above equations is typically derived from the elementary strength of materials equations, using either a net or a gross cross section.. Characteristics of Stress-Concentration Factors.
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Balat (2011) mentioned the following advantages of the acid hydrolysis of lignocellulosic compounds (1) produce syrup of monomeric sugars, (2) remove hemicelluloses, part of the lignin, and heavy metals. process, (3) effective and inexpensive treatment when the sulfu- ric acid concentration was less than 4% (Kumar et al., 2009)..
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K ế t qu ả cân b ằng năng lượ ng s ả n xu ấ t ethanol t ừ cây mía ở. Zimbabwe đã chỉ ra r ằ ng t ỷ l ệ năng lượ ng là 1,52 n ế u t ấ t c ả các đầ u ra xem xét và 1.15 n ếu ethanol đượ c coi là đầ u ra. Giá tr ị báo cáo v ề t ỷ l ệ năng lượ ng thu ầ n s ả n xu ấ t ethanol t ừ cây mía ở Brazil [92] là 2,41 và ở Louisiana, Hoa K ỳ [94], nó là 1,85.T ỷ l ệ th ấ p ở.
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S ả n xu ấ t ethanol sinh h ọ c t ừ lõi b ắ p s ử d ụ ng Aspergillus niger và saccharomyces cerevisae b ằ ng ph ươ ng pháp k ế t h ợ p đườ ng hóa và lên men đồ ng th ờ i 2. Các ch ế ph ẩ m enzyme th ủ y phân lõi b ắ p và s ả n xu ấ t ethanol t ừ cellulose th ủ y phân 3. S ả n xu ấ t ethanol b ằ ng cách th ủ y phân lõi b ắ p nh ờ Escherichia coli KO11 4. So sánh s ự khác nhau gi ữ a hai ph ươ ng pháp th ủ y phân lõi b ắ p s ả n xu ấ t ethanol b ằ ng Pichia stipitis v ớ i Candida shehatae .