Behavior of biomaterials in relation to the conservation time and temperature: stability test of a bioproduct

With the rapid development of economic construction, styrene-butadiene-styrene (SBS)-modified asphalt is being more and more widely used in highway engineering, but there are still many deficiencies in the process of its use. In order to further improve its performance for use, nano-organic palygorskite (A-Pal) and star-shaped SBS were compounded to obtain modified asphalt in this study. The high-temperature stability of SBS-modified asphalt was enhanced after incorporation with A-Pal for the high-temperature stability test by a dynamic shear rheometer. The A-Pal should improve the surface free energy and adhesion of SBS-modified asphalt by the water stability test analysis. The aging test shows that A-Pal can reduce the thermal oxygen decomposition of SBS and improve the anti-aging performance and the fatigue resistance of SBS-modified asphalt. A-Pal has a certain improvement effect on the low temperature performance of SBS-modified asphalt as shown by a low temperature crack resistance test. A-Pal-compounded SBS-modified asphalt features good storage stability in normal temperatures with the lowest critical compatibility temperature.

Download Full-text

STABILITAS ANTOSIANIN DARI KULIT TERONG BELANDA MERAH (Solanum betaceum Cav.) TERHADAP PH DAN SUHU

Jurnal Katalisator ◽

10.22216/jk.v5i1.5023 ◽

2020 ◽

Vol 5 (1) ◽

pp. 64

Author(s):

Sandra Tri Juli Fendri ◽

Verawati Verawati ◽

Putri Saimi Nuras

Keyword(s):

Statistical Data ◽

Ornamental Plants ◽

Temperature Stability ◽

Extraction Process ◽

Stability Test ◽

Anthocyanin Pigment ◽

Liquid Extract ◽

Sample Extract ◽

Influence Of Ph ◽

Solanum Betaceum

There had been identification and stability test of anthocyanin liquid extract from skin of eggplant of Holland that red colored using UV-Vis spectrophotometer. Anthocyanin is a color compound that responsible mostly red, blue and purple in fruit, vegetables and ornamental plants and these anthocyanins belong to the flavonoid group. Eggplans of Holland is taken from Tabing market, Padang City. The extraction process was performed by maceration method using solvent of 96% ethanol: HCl 1% (9:1). The identification of the anthocyanin compound on the sample extract was done by color reaction with 2 M NaOH and 2 M HCl. Stability of the anthocyanin pigment was tested by both the pH and temperature difference treatments. The pH used was pH 1, 3, 5, 7 and 9, while the temperature used was 30oC, 40oC, 60oC, 80oC and 100oC. The parameters of stability are the color of solution, maximum wavelength (λmax) and absorbance. The anthocyanin pigments stability test Eggplant of Holland was performed by using one-way of statistical data of variances (ANOVA), the liquid leather extract was stated stable at the influence of pH to temperature (temperature 30, 40, 60 and 80oC), especially at pH 1-3 next pH 5 and pH 7.Keywords : Anthocyanin, identification, pH, temperature, stability test

Download Full-text

A comparison of aggregate stability test procedures in determining the stability of fine sandy soils in fife, Scotland

CATENA ◽

10.1016/s0341-8162(79)80009-0 ◽

1979 ◽

Vol 6 ◽

pp. 123-129 ◽

Cited By ~ 3

Author(s):

I GRIEVE

Keyword(s):

Aggregate Stability ◽

Sandy Soils ◽

Stability Test ◽

Test Procedures ◽

The Stability

Download Full-text

STABILITY TEST RESULT OF THE JAPANESE TEST COIL FOR THE LARGE COIL TASK AT THE DOMESTIC TEST

Le Journal de Physique Colloques ◽

10.1051/jphyscol:1984128 ◽

1984 ◽

Vol 45 (C1) ◽

pp. C1-131-C1-134 ◽

Cited By ~ 2

Author(s):

M. Nishi ◽

T. Ando ◽

T. Hiyama ◽

H. Tsuji ◽

Y. Takahashi ◽

...

Keyword(s):

Stability Test ◽

Test Result

Download Full-text

Tablet Formulation and Stability Test of Thai Traditional Remedy for Muscle Pain Treatment called Sahasthara

Planta Medica ◽

10.1055/s-0033-1352437 ◽

2013 ◽

Vol 79 (13) ◽

Cited By ~ 1

Author(s):

I Sakpakdeejaroen ◽

A Itharat

Keyword(s):

Muscle Pain ◽

Pain Treatment ◽

Tablet Formulation ◽

Stability Test ◽

Traditional Remedy

Download Full-text

Extraction and Partial Purification of Protease from Bilimbi (Averrhoa bilimbi L.)

Scientific Research Journal ◽

10.24191/srj.v10i2.9403 ◽

2013 ◽

Vol 10 (2) ◽

pp. 29

Author(s):

Normah Ismail ◽

Nur' Ain Mohamad Kharoe

Keyword(s):

Molecular Weight ◽

Protein Content ◽

Ammonium Sulfate ◽

Molecular Weight Distribution ◽

Weight Distribution ◽

Protease Activity ◽

Protein Concentration ◽

Temperature Stability ◽

Partial Purification ◽

Ammonium Sulfate Precipitation

Unripe and ripe bilimbi (Averrhoa bilimbi L.) were ground and the extracted juices were partially purified by ammonium sulfate precipitation at the concentrations of 40 and 60% (w/v). The collected proteases were analysed for pH, temperature stability, storage stability, molecular weight distribution, protein concentration and protein content. Protein content of bilimbi fruit was 0.89 g. Protease activity of both the unripe and ripe fruit were optimum at pH 4 and 40°C when the juice were purified at 40 and 60% ammonium sulfate precipitation. A decreased in protease activity was observed during the seven days of storage at 4°C. Molecular weight distribution indicated that the proteases protein bands fall between IO to 220 kDa. Protein bands were observed at 25, 50 and 160 kDa in both the unripe and ripe bilimbi proteases purified with 40% ammonium sulfate, however, the bands were more intense in those from unripe bilimbi. No protein bands were seen in proteases purified with 60% ammonium sulfate. Protein concentration was higher for proteases extracted with 40% ammonium sulfate at both ripening stages. Thus, purification using 40% ammonium sulfate precipitation could be a successful method to partially purify proteases from bilimbi especially from the unripe stage.

Download Full-text