The Experts below are selected from a list of 49818 Experts worldwide ranked by ideXlab platform
Namtrung Nguyen - One of the best experts on this subject based on the ideXlab platform.
-
solvent free fabrication of biodegradable hot film flow sensor for noninvasive respiratory monitoring
Journal of Physics D, 2017Co-Authors: Toan Dinh, Hoangphuong Phan, Tuankhoa Nguyen, Peter Woodfield, Afzaal Qamar, Namtrung NguyenAbstract:In this Paper, we report on a low-cost, environment-friendly and wearable thermal flow sensor, which can be manufactured in-house using pencil graphite as a sensing hot film and biodegradable Printing Paper as a substrate, without using any toxic solvents or cleanroom facilities. The hot film flow sensor offers excellent performance such as high signal-to-noise ratio (40 for an air flow velocity of 1 m s−1), high sensitivity to airflow (53.7 mV(m s−1)−0.8) and outstanding long-term stability (almost no drift in 24 h). The sensor can be comfortably affixed to the philtrum of patients and measures human respiration in realtime. The results indicate that the wearable thermal flow sensors fabricated by this solvent-free and user-friendly method could be employed in human respiratory monitoring.
Toan Dinh - One of the best experts on this subject based on the ideXlab platform.
-
solvent free fabrication of biodegradable hot film flow sensor for noninvasive respiratory monitoring
Journal of Physics D, 2017Co-Authors: Toan Dinh, Hoangphuong Phan, Tuankhoa Nguyen, Peter Woodfield, Afzaal Qamar, Namtrung NguyenAbstract:In this Paper, we report on a low-cost, environment-friendly and wearable thermal flow sensor, which can be manufactured in-house using pencil graphite as a sensing hot film and biodegradable Printing Paper as a substrate, without using any toxic solvents or cleanroom facilities. The hot film flow sensor offers excellent performance such as high signal-to-noise ratio (40 for an air flow velocity of 1 m s−1), high sensitivity to airflow (53.7 mV(m s−1)−0.8) and outstanding long-term stability (almost no drift in 24 h). The sensor can be comfortably affixed to the philtrum of patients and measures human respiration in realtime. The results indicate that the wearable thermal flow sensors fabricated by this solvent-free and user-friendly method could be employed in human respiratory monitoring.
Ulrike W Tschirner - One of the best experts on this subject based on the ideXlab platform.
-
alkaline sulfite anthraquinone as aq pulping of wheat straw and totally chlorine free tcf bleaching of pulps
Industrial Crops and Products, 2009Co-Authors: Sahab Hedjazi, O Kordsachia, R Patt, Ahmad Jahan Latibari, Ulrike W TschirnerAbstract:Abstract Alkaline sulfite–anthraquinone (AS/AQ) pulping of wheat straw and totally chlorine free (TCF) bleaching of resulting pulps was investigated. Wheat straw was supplied by the Ferdosii University Experimental Station in Northeastern Iran, cleaned and chopped into about 3–5 cm long pieces. In the AS/AQ pulping experiments, the active alkali charge on oven dry wheat straw, heating time to maximum cooking temperature, AQ dose and liquor to straw ratio were kept constant at 16%, 60 min, 0.1% and 4/1, respectively. The alkali ratio, Na2SO3/NaOH, calculated as NaOH, was varied from 20/80 to 80/20. Cooking time at maximum temperature was varied from 30 to 90 min and maximum cooking temperature was adjusted between 152 and 160 °C. Reference soda and soda/AQ pulps were produced. AS/AQ and soda/AQ pulps with kappa numbers below 15 were produced easily. Cooking of corresponding soda pulps under comparable conditions stopped at a kappa number of 25. The characteristics of unbleached AS/AQ, soda/AQ and soda pulps were compared. AS/AQ and soda/AQ pulps had similar tensile strength but tear was in favor to AS/AQ. The latter had much higher yield and brightness. TCF bleaching of AS/AQ pulp was performed in O Q (OP) or O Q (OP) P sequences. Oxygen delignification (O) resulted in a delignification degree of approximately one third. Followed by a chelating treatment (Q) and a subsequent (OP) stage under drastic conditions a brightness of 82.7% ISO was achieved in an O Q (OP) sequence. The sequence O Q (OP) P, with 2% H2O2 in the final P stage, improved brightness from 77.2% ISO after the OP stage to 83.6% ISO. Bleaching led to only small losses in tensile and burst strength but enhanced tear strength. Short beating in a Jokro mill was sufficient to attain good pulp strength. The results of this study indicate that AS/AQ pulping and TCF bleaching is a convincing alternative to produce high-quality pulp from wheat straw for writing and Printing Paper.
-
bagasse alkaline sulfite anthraquinone as aq pulping and totally chlorine free tcf bleaching
Holzforschung, 2008Co-Authors: Sahab Hedjazi, O Kordsachia, R Patt, Ahmad Jahan Latibari, Ulrike W TschirnerAbstract:Alkaline sulfite/anthraquinone (AS/AQ) pulping and totally chlorine free (TCF) bleaching of bagasse was investigated. Depithed and wet cleaned bagasse was collected from the Pars Paper Company in southern Iran, dried and then pulped. The active alkali charge was chosen between 16 and 20% on oven-dry bagasse and the alkali ratio, Na2SO3/NaOH, was varied from 30/70 to 70/30. The AQ dose was kept constant. While keeping a constant cooking time at maximum temperature for 60 min, the maximum temperature was varied between 155 and 165 degrees C. For bleaching, a pulp with a kappa number of 8.5 was produced under the following conditions: 18% active alkali, alkali ratio 30/70, 60 min cooking at 155 degrees C. TCF bleaching was performed with oxygen and hydrogen peroxide. Oxygen delignification (O) with an alkali charge of 2% NaOH resulted in 50% degree of delignification. A brightness of 80% ISO was achieved with a chelating treatment (Q) and a subsequent oxygen reinforced peroxide bleaching stage (OP) under drastic conditions (4% H2O2, 2.75% NaOH, 90 min at 98 degrees C). With an additional peroxide bleaching stage charging 2% H2O2, the brightness could be further improved to 83.5% ISO. Bleaching led to only small losses in tensile and burst strength at unchanged tear strength. Short beating in a Jokro mill successfully applied to bagasse to produce pulp for writing and Printing Paper.
Tianju Chen - One of the best experts on this subject based on the ideXlab platform.
-
tg ms analysis and kinetic study for thermal decomposition of six representative components of municipal solid waste under steam atmosphere
Waste Management, 2015Co-Authors: Jinzhi Zhang, Tianju ChenAbstract:Thermal decomposition of six representative components of municipal solid waste (MSW, including lignin, Printing Paper, cotton, rubber, polyvinyl chloride (PVC) and cabbage) was investigated by thermogravimetric-mass spectroscopy (TG-MS) under steam atmosphere. Compared with TG and derivative thermogravimetric (DTG) curves under N2 atmosphere, thermal decomposition of MSW components under steam atmosphere was divided into pyrolysis and gasification stages. In the pyrolysis stage, the shapes of TG and DTG curves under steam atmosphere were almost the same with those under N2 atmosphere. In the gasification stage, the presence of steam led to a greater mass loss because of the steam partial oxidation of char residue. The evolution profiles of H2, CH4, CO and CO2 were well consistent with DTG curves in terms of appearance of peaks and relevant stages in the whole temperature range, and the steam partial oxidation of char residue promoted the generation of more gas products in high temperature range. The multi-Gaussian distributed activation energy model (DAEM) was proved plausible to describe thermal decomposition behaviours of MSW components under steam atmosphere.
Hoangphuong Phan - One of the best experts on this subject based on the ideXlab platform.
-
solvent free fabrication of biodegradable hot film flow sensor for noninvasive respiratory monitoring
Journal of Physics D, 2017Co-Authors: Toan Dinh, Hoangphuong Phan, Tuankhoa Nguyen, Peter Woodfield, Afzaal Qamar, Namtrung NguyenAbstract:In this Paper, we report on a low-cost, environment-friendly and wearable thermal flow sensor, which can be manufactured in-house using pencil graphite as a sensing hot film and biodegradable Printing Paper as a substrate, without using any toxic solvents or cleanroom facilities. The hot film flow sensor offers excellent performance such as high signal-to-noise ratio (40 for an air flow velocity of 1 m s−1), high sensitivity to airflow (53.7 mV(m s−1)−0.8) and outstanding long-term stability (almost no drift in 24 h). The sensor can be comfortably affixed to the philtrum of patients and measures human respiration in realtime. The results indicate that the wearable thermal flow sensors fabricated by this solvent-free and user-friendly method could be employed in human respiratory monitoring.
