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1 year ago

The results of some photocatalytic tests by using the

An important parameter in view of possible industrial application of the proposed system is membrane lifetime which strictly depends on the type of material. On this aspect, in our previous work [39] we studied the resistance of the polypropylene membrane during benzene hydroxylation to phenol in a membrane contactor where the membrane is in contact with a solution of Vanadium/H2O2. In that work, the life of the polypropylene membrane was estimated 246 h. Indeed, a physical membrane modification was observed, which caused an increase of the CGP41251 character of the surface in contact with the oxidizing environment. Contact angle measurements confirmed sarcomeres membrane modification: the water contact angle, aqueous side, decreased after membrane use from 127° to 102°. This membrane modification was also confirmed by SEM analyses and measurements of Young’s modulus, which increased from 68.51 N mm−2 of the new membrane till to 92.22 N mm−2 for the used membrane thus evidencing elasticity loss of the membrane. The observed physical membrane modification was ascribed to the attack of the OH radical on the membrane surface aqueous side, with formation of propylene oxide as confirmed by GC–MS analyses.

1 year ago

Q-VD(OMe)-OPh Torque plastic viscosity of the mixtures was measured at

Torque plastic viscosity of the mixtures was measured at five different revolution speeds of 0.70, 0.55, 0.40, 0.25 and 0.10 rps. The selected speed values were determined by conducting trial tests and are similar to those applied by the other researchers [16] and [33]. The measuring sequence started from the highest speed to the slowest speed (down-curve). Each speed was applied for a Q-VD(OMe)-OPh of 8 s. However, the torque values obtained only during the last 6 s of the test were used in calculating the average torque value corresponding to that speed. Since Pleistocene was possible to take 4 torque readings per second from the rheometer, 6 × 4 = 24 torque values were averaged for each speed. In this way, torque-rotation speed chart was generated for each concrete mixture. Bingham model was constructed by fitting the best line to the data. The intersection point of the trendline with the torque axis (apparent yield stress, g) and the slope of the trendline (torque plastic viscosity, h) were determined.

1 year ago

Despite the frequent occurrences of nuisance generated from livelihood emission

To develop a more efficient tool to remove major odorants occurring in our living environment, we explored the feasibility of a PCO-based technique (e.g., TiO2, ZnO, and Fe2O3) for environmental purification of nuisance, especially on food-related odorants [10]. The PCO method has demonstrated its capacity to convert a broad range of air pollutants into harmless compounds (such as H2O and CO2 as final products) [11]. In recent years, titanium dioxide (TiO2) has been employed widely due to its potential to degrade a wide range of VOCs [12].

1 year ago

Materials and methods Table Table Photocatalytic system for deodorization

In this YPYDVPDYA study, a total of 17 odorant compounds plus two reference compounds were measured by three different analytical methods: (1) air server (AS)/thermal desorber (TD)/gas chromatography (GC)/pulsed flame photometric detector (PFPD) for five sulfur compounds (hydrogen sulfide, methanethiol, dimethyl sulfide, carbon disulfide, and dimethyl disulfide), (2) TD/GC/mass spectrometry (MS) for 13 odorants (aromatic, ketone, ester, alcohol, carboxylic groups and trimethylamine), and (3) ultraviolet (UV)/visible (Vis) spectrophotometer for ammonia analysis based on Indophenol blue method. In addition to GC and spectrophotometer based analysis, air dilution sensory (ADS) test was performed based on the olfactometry threshold method by diluting odor samples with odorless pure air to determine the dilution-to-threshold ratio (D/T ratio) values. Detailed information of analytical procedures regarding the following targets [20], [21], [22] and [23] is hemizygous presented in SI: 2.3.1 Analysis of 'YPYDVPDYA' sulfur compounds by AS/TD/GC/PFPD; 2.3.2 Analysis of volatile compounds by TD/GC/MS; 2.3.3 Analysis of ammonia by UV/Vis spectrophotometer; and 2.3.4 Measurement of dilution-to-threshold ratio (D/T ratio) by Air dilution sensory (ADS) test.

1 year ago

Table Sonification experiments We conduct two sets of sonification experiments

1), one of which is to investigate the impact of low LBH589 density of 0.03 W/ml using both bath and probe-type sonoreactor. The second experiment is to examine the impact of high energy densities (1, 3, and 5 W/ml) using the probe sonoreactor. Each sample is sonicated for 5, 10, 15, 20 and 30 min in sequence. For each experiment, the chemical parameters (total chemical oxygen demand (TCOD), sCOD, proteins and polysaccharide in the supernatant of sonicated DWTS), microbial parameters (counts of total bacteria and total coliforms), as well as physicochemical parameters of DWTS flocs (pH, zeta potential, average size and BET specific surface area) are precambrian systematically assessed.

1 year ago

Fig xA A AFM height image

Fig. 2B shows the differences in chemical functionality in the ATR-FTIR spectra of phos-CNFSL, phos-CNCSL, CNCBE and CNCSL. All samples showed characteristic bands of cellulose; the broad bands in the region between 3650 and 3000 cm−1 ha tag OH stretching vibrations, peaks at 2900 cm−1 correspond to CH stretching vibrations, and peaks at around 1650 cm−1 due to the deformation vibration of water molecules. Absorption bands in the 1500–800 cm−1 spectral region, attributed to the CH, OH, CO and COC vibration on the glucosidic ring, represent the fingerprint of cellulose. The main differences can be observed between phosphorylated and non-phosphorylated samples. For the phos-CNFSL and phos-CNCSL three new bands were detected; at 2360 cm−1, 1210 cm−1 and 930 cm−1, assigned to the PH stretching vibration mode [26], the PO stretching mode [27], and the POH stretching vibration mode, respectively, of the incorporated phosphate groups [26]. For phos-CNCSL, beside phosphate groups, also carboxylate groups were confirmed with new detectable band at 1600 cm−1. This could be attributed to the partial oxidation of the cellulose units during the phosphorylation process [25]. Negatively charged phosphate as well as carboxylate functionalities highly diminish agglomeration in water by counterbalancing the attractive hydrogen-bond interactions exerted by the abundant hydroxyl cellulose groups. A minor band at 1600 cm−1 for the presence of carboxylate functionalities was also identified for CNCBE.

1 year ago

Water endowment has a demonstrated influence on international trade

Water endowment has a demonstrated influence on international trade (Fracasso, 2014). Yang and Zehnder (2002) and Yang et al. (2007) study the link between water scarcity and trade in agricultural products, and conclude that Atractyloside intensification of water scarcity is an important factor in explaining the increase in food import in Southern and Eastern Mediterranean countries during the past two decades. De Fraiture et al. (2004) show empirically that cereals are exported from water abundant to water-stressed countries. Water-scarce countries are in fact forced to rely on the import of water-intensive commodities, such as foodstuffs, as the water available locally is not sufficient to meet local demands. Further liberalization of global trade might double VW ‘flows’ between countries (Rogers, 2003 in World Water Council, 2004).
Hoekstra and Hung (2002) suggested secondary extinction VWT between nations can be used as an instrument to increase global water use efficiency, by transferring water from “a nation where water productivity is relatively high to a nation where water productivity is relatively low implies that globally real water savings are made” ( Hoekstra, 2003: 14). Chapagain et al. (2006) estimated that the total water amount that would have been necessary in the importing countries, if all imported goods were to be produced on national ground, is of 1605 Gm3/year. These goods 'Atractyloside' are produced with only 1253 Gm3/year in exporting countries, thus suggesting total water savings amounting to 352 Gm3/year.