scholarly journals Hygrothermal and Acoustical Performance of Starch-Beet Pulp Composites for Building Thermal Insulation

Materials ◽  
2018 ◽  
Vol 11 (9) ◽  
pp. 1622 ◽  
Author(s):  
Hamzé Karaky ◽  
Chadi Maalouf ◽  
Christophe Bliard ◽  
Tala Moussa ◽  
Nadim El Wakil ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Potato Starch ◽  
Test Results ◽  
Optimal Composition ◽  
Green Composite ◽  
Co2 Gas ◽  
Acoustical Properties ◽  
Beet Pulp ◽  
Hygric Properties

This article deals with the elaboration and the characterization of an innovative 100% plant-based green composite made solely of beet pulp (BP) and potato starch (S). Using this type of material in insulation applications seems a good solution to reduce the CO2 gas emissions in building. The influence of the starch amount on composite characteristics was studied. Four mixtures were considered with different S/BP mass ratios (0.1, 0.2, 0.3 and 0.4). The physical properties of these materials were studied in terms of porosity, apparent and absolute densities, thermal conductivity, and hygric properties. The influence of humidity content on acoustical properties was studied as a function of frequency. Test results show a real impact of both starch and humidity contents on the hygrothermal and acoustical properties of the studied material due to the porosity. The composite with the lowest amount of starch (S/BP = 0.1) seems to be the optimal composition in terms of the hygrothermal and acoustical behaviors.

Hygrothermal performance of various Typha–clay composite

2018 ◽  
Vol 42 (3) ◽  
pp. 316-335 ◽  
Author(s):  
Ibrahim Niang ◽  
Chadi Maalouf ◽  
Tala Moussa ◽  
Christophe Bliard ◽  
Etienne Samin ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Optimal Composition ◽  
Volume Weight ◽  
Hygrothermal Behavior ◽  
Three Samples ◽  
Hygrothermal Performance ◽  
Absolute Density ◽  
Typha Australis ◽  
Hygric Properties ◽  
Made In

This article deals with the influence of both morphology and amount of Typha on hygrothermal behavior of a Typha–clay composite for building application. An agromaterial containing the fiber mix of Typha Australis and clay was made in three samples: three fiber mixtures were prepared with different amounts Typha and cut type (transversal or longitudinal). The physical properties of these materials were studied in terms of porosity, apparent and absolute density, thermal conductivity, and hygric properties. Results show a real impact of the Typha fraction type and its volume content on hygrothermal properties of the studied material due to the porosity. The transversal fraction of Typha (80% in volume weight) seems to be the optimal composition for a better hygrothermal behavior.

scholarly journals Mechanical and thermal characterization of a beet pulp-starch composite for building applications

2019 ◽  
Vol 85 ◽  
pp. 08005
Author(s):  
Hamzé Karpaky ◽  
Chadi Maalouf ◽  
Christophe Bliard ◽  
Alexandre Gacoin ◽  
Mohammed Lachi ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Sugar Beet ◽  
Building Materials ◽  
Potato Starch ◽  
Starch Content ◽  
Compressive Strain ◽  
Thermal Inertia ◽  
Thermal Characterization ◽  
Sugar Beet Pulp ◽  
Beet Pulp

This work shows the making of a new bio-based material for building insulation from sugar beet pulp and potato starch. The material is both lightweight and ecofriendly. The influence of starch/ sugar beet pulp ratio (S/BP) is studied. Four binder mass dosages are considered, 10, 20, 30 and 40% (relative to the beet pulp). Samples are characterized in terms of absolute and bulk density, compressive and flexural strength, as well as thermal properties (thermal conductivity and thermal inertia). The compressive strength increases linearly with the S/BP mass ratio to reach 0.52 MPa and the compressive strain is 30%. The thermal conductivity is to around 0.070 W/m. K. The results obtained shows that increasing starch amount tends to decrease composite porosity but increases thermal conductivity and mechanical properties. Depending on the starch content, beet pulp composites have a good thermal and can be used as building materials.

scholarly journals Characterization of beet-pulp fiber reinforced potato starch biopolymer composites for building applications

2019 ◽  
Vol 203 ◽  
pp. 711-721 ◽  
Author(s):  
Hamzé Karaky ◽  
Chadi Maalouf ◽  
Christophe Bliard ◽  
Alexandre Gacoin ◽  
Mohammed Lachi ◽  
...  
Keyword(s):  
Potato Starch ◽  
Pulp Fiber ◽  
Fiber Reinforced ◽  
Beet Pulp ◽  
Biopolymer Composites

Characterization of Interconnect Defects Using Scanning Thermal Conductivity Microscopy

2004 ◽  
Author(s):  
H.W. Ho ◽  
J.C.H. Phang ◽  
A. Altes ◽  
L.J. Balk
Keyword(s):  
Thermal Conductivity ◽  
Integrated Circuits ◽  
Large Scale

Abstract In this paper, scanning thermal conductivity microscopy is used to characterize interconnect defects due to electromigration. Similar features are observed both in the temperature and thermal conductivity micrographs. The key advantage of the thermal conductivity mode is that specimen bias is not required. This is an important advantage for the characterization of defects in large scale integrated circuits. The thermal conductivity micrographs of extrusion, exposed and subsurface voids are presented and compared with the corresponding topography and temperature micrographs.

scholarly journals 231 Impact of Brachyspira hyodysentariae on intestinal function and integrity

2020 ◽  
Vol 98 (Supplement_3) ◽  
pp. 116-116
Author(s):  
Emma T Helm ◽  
Susanne J Lin ◽  
Nicholas Gabler ◽  
Eric R Burrough
Keyword(s):  
Ex Vivo ◽  
Potato Starch ◽  
Nutrient Digestibility ◽  
High Morbidity ◽  
Post Inoculation ◽  
Intestinal Function ◽  
Treatment Groups ◽  
Intestinal Integrity ◽  
Beet Pulp ◽  
The Impact

Abstract Swine dysentery (SD) induced by Brachyspira hyodysentariae (Bhyo) causes colitis and mucohemorrhagic diarrhea in grow-finish pigs, however little is known about the physiological changes that occur to the gastrointestinal tract during Bhyo infection. Thus, the objective of this study was to evaluate the impact of a Bhyo challenge on intestinal function and integrity of pigs fed two divergent diets. A total of 36 Bhyo negative gilts (24.3 ± 3.6 kg BW) were selected and assigned to one of three treatment groups (n=12 pigs/trt): 1) Bhyo negative, 20% DDGS diet (CON), 2) Bhyo challenged, 20% DDGS diet (DDGS), and 3) Bhyo challenged, 10% DDGS, 5% beet pulp and 5% resistant potato starch diet (RS). Pigs were fed diets 21 days prior to challenge and on days post inoculation (dpi) 0 and 1, pigs were inoculated with Bhyo or sham. Fecal samples were collected for ATTD and pigs were euthanized for colon collection within 72 hours of initial observation of clinical SD, or at the end of the study (dpi 10-16). Tissues were assessed for ex vivo measures of intestinal integrity and mitochondrial function. The challenge resulted in high morbidity, with 88% of DDGS and RS pigs developing clinical SD. Colon transepithelial resistance was increased in DDGS pigs compared with CON and RS pigs (P=0.005), and colon macromolecule permeability was reduced in both DDGS and RS pigs compared with CON pigs (P=0.006), likely due to mucoid discharge. Colonic mitochondrial oxygen consumption was not impacted by treatment (P >0.10). Further, ATTD of DM, OM, N, and GE were reduced in DDGS pigs compared with CON pigs (P< 0.001), whilst nutrient digestibility was not reduced in RS pigs. Taken together, these data show Bhyo does not appear to reduce ex vivo colonic integrity. Further, the RS diet may reduce severity of a Bhyo challenge.

Optimization and characterization of flavonoids extracted from Cannabis sativa fibers

2021 ◽  
pp. 004051752110277
Author(s):  
Qilu Cui ◽  
Jiawei Li ◽  
Chongwen Yu
Keyword(s):  
Chemical Structure ◽  
Cannabis Sativa ◽  
Ethanol Concentration ◽  
Extraction Process ◽  
Test Results ◽  
Hemp Fiber ◽  
Hemp Fibers ◽  
Structure Surface ◽  
Degumming Process

In this paper, the extraction process of flavonoids from hemp fibers was studied. Response surface methodology (RSM) analysis of the extraction parameters indicated that optimized results would be ethanol concentration 76 vol.%, bath ratio 1:50, and reaction time 139 min; therefore, an optimal extraction rate of flavonoids of 0.2275% can be obtained. The chemical structure, surface morphology and element composition of flavonoid extracts were analyzed. The test results indicated that hemp extract contains flavonoids, which can be used to extract flavonoids from hemp fiber, so as to comprehensively develop hemp fiber and reduce the discharge of waste liquid in the traditional degumming process.

scholarly journals Design and Experimental Characterization of L-CADEL v2, an Assistive Device for Elbow Motion

Sensors ◽  
2021 ◽  
Vol 21 (15) ◽  
pp. 5149
Author(s):  
Marco Ceccarelli ◽  
Mykhailo Riabtsev ◽  
Axel Fort ◽  
Matteo Russo ◽  
Med Amine Laribi ◽  
...  
Keyword(s):  
Elderly People ◽  
Operating Performance ◽  
Assistive Device ◽  
Test Results ◽  
Experimental Characterization ◽  
Elbow Motion ◽  
Laboratory Prototype

An experimental characterization is presented for an improved version of a wearable assistive device for elbow motion. The design is revised with respect to requirements for elbow motion assistance, looking at applications both in rehabilitation therapies and exercising of elderly people. A laboratory prototype is built with lightweight, portable, easy-to-use features that are verified with test results, whose discussion is also provided as a characterization of operating performance.

scholarly journals PSIX-1 Altering dietary fiber components mitigates severity of Brachyspira hyodysentariae challenge

2020 ◽  
Vol 98 (Supplement_3) ◽  
pp. 190-191
Author(s):  
Emma T Helm ◽  
Nicholas Gabler ◽  
Eric R Burrough
Keyword(s):  
Dietary Fiber ◽  
Potato Starch ◽  
Dietary Treatment ◽  
Mitigation Strategies ◽  
Post Inoculation ◽  
Insoluble Dietary Fiber ◽  
Beet Pulp ◽  
Pig Performance ◽  
Swine Herds ◽  
And Control

Abstract Swine dysentery (SD) induced by Brachyspira hyodysentariae (Bhyo) has recently become more prevalent in swine herds, renewing research interest regarding dietary mitigation strategies. It has been reported that insoluble dietary fiber such as DDGS influences Bhyo colonization leading to more rapid disease development. Therefore, the objective of this study was to determine if replacement of insoluble (20% DDGS) with soluble and highly fermentable [sugar beet pulp (BP) and resistant potato starch (RS)] fiber would reduce Bhyo disease expression. At total of 38 pigs (40.9 ± 5.0 kg BW) were selected, confirmed negative for Bhyo, and allocated to dietary treatment groups (13 pigs/trt): 1) Control consisting of 20% DDGS, no BP or RS (0%), 2) 10% DDGS, 5% BP and 5% RS (5%), or 3) 0% DDGS, 10% BP, 10% RS (10%). All diets were formulated to be isocaloric and isonitrogenous. Diets were fed for 14 days pre-challenge and on days post inoculation (dpi) 0, all pigs were inoculated with Bhyo. Pigs and feeders were weighed weekly for 28 dpi. Overall, ADG was greater in both 5% (0.85 kg/d) and 10% (1.18 kg/d) pigs compared with 0% pigs (0.63 kg/d; P=0.004). The 10% pigs (2.46 kg/d) had greater ADFI compared with the 0% pigs (1.84 kg/d; P=0.024), 5% pigs being intermediate (2.20 kg/d). The 10% pigs also had greater G:F compared with both the 0% and 5% pigs (P< 0.001). In terms of clinical disease presentation, 11/13 0% pigs developed clinical SD compared with 6/13 5% pigs and only 2/13 10% pigs (P=0.002). In conclusion, while not completely protective, reducing insoluble dietary fiber via replacement with soluble and fermentable BP and RS reduced clinical SD and improved pig performance during a 28-day Bhyo challenge. These data suggest such dietary manipulation may reduce usage of antibiotics in SD treatment and control.

Characterization of an Improved dc Plasma Excitation Source

1980 ◽  
Vol 34 (1) ◽  
pp. 24-30 ◽  
Author(s):  
G. N. Coleman ◽  
W. P. Braun ◽  
A. M. Allen
Keyword(s):  
Thermal Conductivity ◽  
Direct Current ◽  
Direct Evidence ◽  
Plasma Jet ◽  
Sample Introduction ◽  
Direct Current Plasma ◽  
Actual Mechanism ◽  
Improved Stability ◽  
Plasma Excitation

Several modifications of the direct current plasma jet have resulted in significantly enhanced analysis capabilities. Reducing the electrode angle, decreasing the aerosol chimney size, and operating in a diffuse mode with helium have provided improved stability, sensitivity, freedom from interferences, and detection limits. While the actual mechanism of the helium enhancement is not clear, no direct evidence was found which supports participation in the excitation step. Rather, improved desolvation, vaporization and possibly sample introduction result from the thermal conductivity of helium being much greater than that of argon.

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