Effects of Laccase on the Properties of Hemp Fabric

2013 ◽  
Vol 690-693 ◽  
pp. 999-1002 ◽  
Author(s):  
Xiao Li Zhang ◽  
Yin Di He
Keyword(s):  
Loss Rate ◽  
Ph Value ◽  
Flexural Stiffness ◽  
Capillary Effect ◽  
Optimal Process ◽  
Weight Loss Rate ◽  
Fabric Weight ◽  
Hemp Fabric ◽  
Temperature Time ◽  
Linen Fabric

Laccase was selected totreat linen fabric. Such properties of linenfabric were analyzed as weight loss rate, whiteness, breakagestrength, capillary effect, flexural stiffness. The orthogonal test was designedabout pH value, temperature, time and concentration. The factorswere discussed on hemp fabric performance. The optimal process of laccase treatment on hemp fabricis: 50°C, pH4, 25ml/300ml, 50min. Underthe best conditions, hemp fabric weight lossrate 1.87%, breakingstrength 674.7N, whiteness 60.7,flexural stiffness 703.7, capillary effect 8.08cm,wrinkle recovery angle174 º. And the hempfiber’s microstructure changed.

Study on the Factors and Degradation of Cellulose Degradation Bacteria

2013 ◽  
Vol 864-867 ◽  
pp. 40-43
Author(s):  
Song Liu
Keyword(s):  
Filter Paper ◽  
Loss Rate ◽  
Incubation Temperature ◽  
Ph Value ◽  
Cellulose Degradation ◽  
Weight Loss Rate ◽  
High Efficient ◽  
Initial Ph ◽  
Congo Red Staining ◽  
Single Factor Experiment

This study obtained 12 microbial degradation of cellulose from perennial accumulation of cellulose waste soil, through Congo red staining, isolated high efficient bacteria N4 degradation of cellulose. The N4 strain degradation single factor experiment showed that: carbon concentration, incubation temperature and initial pH value influence on the degradation of filter paper. Through the orthogonal experimental study obtained: when the concentration of filter paper is 0.5%, culture temperature is 30 °C, initial pH is 8, N4 strain filter paper degradation rate reached optimal, filter paper weight loss rate of 68.92%.

scholarly journals Effect of pH on the Corrosion and Repassivation Behavior of TA2 in Simulated Seawater

Materials ◽  
2021 ◽  
Vol 14 (22) ◽  
pp. 6764
Author(s):  
Yingxiao Zhang ◽  
Tingting Yan ◽  
Lin Fan ◽  
Zhiyong Liu ◽  
Longfei Song ◽  
...  
Keyword(s):  
Passive Film ◽  
Loss Rate ◽  
Ph Value ◽  
Weight Loss Rate ◽  
Time Curve ◽  
Topology Analysis ◽  
Effect Of Ph ◽  
Electrochemical Tests ◽  
Seawater Ph ◽  
Simulated Seawater

The effect of pH on the corrosion and repassivation behavior of TA2 in simulated seawater was studied using electrochemical tests, immersion experiments, and surface morphology topology analysis. The results show that Ecorr and Rf increased while ipass and weight loss rate decreased as the pH of simulated seawater increased. The TA2 passive film was determined to be mainly composed of a large amount of TiO2 and a small amount of TiO. The repassivation function of TA2 can be expressed as E = −0.1375 + 0.0532ln(t − 1.241) for a simulated seawater pH of 8.2. The parameter b, which represents the slope of the potential–time curve during the friction electrode test, was used to evaluate the repassivation behavior of TA2. The increase in pH value was observed to promote the repassivation speed of the passive film, which is beneficial to the corrosion resistance of TA2.

Application of Ultrasonic Technology in the Enzyme Pretreatment of PLA Fabric

2013 ◽  
Vol 821-822 ◽  
pp. 378-381 ◽  
Author(s):  
Zhong Jun Fu ◽  
Hao Fei Huang ◽  
Lu Shan Yu ◽  
Yun Fei Sun
Keyword(s):  
Weight Loss ◽  
Ultrasonic Treatment ◽  
Loss Rate ◽  
Ultrasonic Method ◽  
Weight Loss Rate ◽  
Time Saving ◽  
Enzyme Pretreatment ◽  
Ultrasonic Technology ◽  
Fabric Weight

In this paper, compared with the traditional desizing process, the ultrasonic technology was applied to the pretreatment of PLA fabric combined with enzyme. The results showed that the fabric weight loss rate and the whiteness of the fabric increased 15% and 20% respectively after the ultrasonic treatment. Besides, the efficiency of the ultrasonic method also increased by 20% time saving.

Synthesis and properties of a benzoxazine monomer containing maleimide and biphenyl groups

2021 ◽  
pp. 095400832199674
Author(s):  
Tao Guo ◽  
Yang Fan ◽  
Chang Bo ◽  
Zhang Qi ◽  
Han Tao ◽  
...  
Keyword(s):  
Weight Loss ◽  
Loss Rate ◽  
Proton Nuclear Magnetic Resonance ◽  
Significant Weight Loss ◽  
Scanning Calorimetry ◽  
Weight Loss Rate ◽  
Reaction Heat ◽  
H Nmr ◽  
Curing Reaction ◽  
Dsc Curves

Benzoxazine resin exhibits excellent properties and is widely used in many fields. Herein, the synthesis of a novel compound, the bis(2,4-dihydro-2 H-3-(4- N-maleimido)phenyl-1,3-benzoxazinyl)biphenyl (BMIPBB), has been reported, which was synthesized by reacting N-(4-aminophenyl)maleimide (APMI), formaldehyde, and 4,4’-dihydroxybiphenyl. 1,3,5-three(4-(maleimido)phenyl)-1,3,5-triazine (TMIPT) was formed as an intermediate during the reaction. The proton nuclear magnetic resonance (1H-NMR) and Fourier transform-infrared (FTIR) spectroscopy experiments were conducted to determine the structure of BMIPBB. BMIPBB was obtained as a reddish-brown solid in 40.1% yield. The thermal properties of BMIPBB were investigated using differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) techniques. Analysis of the DSC curves revealed that the broad peak representing the release of curing reaction heat appeared in the temperature range of 140–330°C. The peak temperature was 242.59°C and the heat of the reaction was 393.82 J/g, indicating that the rate of the curing reaction was low and the heat of the reaction was high. Analysis of the TGA results revealed that the weight loss rate was 5% at 110°C. The monomer exhibited a significant weight loss in the range of 320–500°C. The compound lost 50% of its weight at a temperature of 427°C.

scholarly journals Equilibrium modeling of mono and binary sorption of Cu(II) and Zn(II) onto chitosan gel beads

2016 ◽  
Vol 37 (4) ◽  
pp. 485-501 ◽  
Author(s):  
Józef Nastaj ◽  
Małgorzata Tuligłowicz ◽  
Konrad Witkiewicz
Keyword(s):  
Metal Ion ◽  
Ph Value ◽  
Experimental Studies ◽  
Process Conditions ◽  
Optimal Process ◽  
Sorption Data ◽  
Gel Beads ◽  
Two Component ◽  
Equilibrium Data ◽  
Chitosan Gel

Abstract The objective of the work are in-depth experimental studies of Cu(II) and Zn(II) ion removal on chitosan gel beads from both one- and two-component water solutions at the temperature of 303 K. The optimal process conditions such as: pH value, dose of sorbent and contact time were determined. Based on the optimal process conditions, equilibrium and kinetic studies were carried out. The maximum sorption capacities equaled: 191.25 mg/g and 142.88 mg/g for Cu(II) and Zn(II) ions respectively, when the sorbent dose was 10 g/L and the pH of a solution was 5.0 for both heavy metal ions. One-component sorption equilibrium data were successfully presented for six of the most useful three-parameter equilibrium models: Langmuir-Freundlich, Redlich-Peterson, Sips, Koble-Corrigan, Hill and Toth. Extended forms of Langmuir-Freundlich, Koble-Corrigan and Sips models were also well fitted to the two-component equilibrium data obtained for different ratios of concentrations of Cu(II) and Zn(II) ions (1:1, 1:2, 2:1). Experimental sorption data were described by two kinetic models of the pseudo-first and pseudo-second order. Furthermore, an attempt to explain the mechanisms of the divalent metal ion sorption process on chitosan gel beads was undertaken.

scholarly journals Thermogravimetric analysis of empty fruit bunch

2018 ◽  
Vol 225 ◽  
pp. 02002 ◽  
Author(s):  
Girma T. Chala ◽  
Ying P. Lim ◽  
Shaharin A. Sulaiman ◽  
Chin L. Liew
Keyword(s):  
Thermogravimetric Analysis ◽  
Heat Flow ◽  
Loss Rate ◽  
Renewable Energy Sources ◽  
Thermal Reaction ◽  
Maximum Temperature ◽  
Empty Fruit Bunch ◽  
Weight Loss Rate ◽  
Minimum Heat ◽  
Maximum Weight Loss

This paper presents the characteristics of empty fruit bunch (EFB) using thermogravimetric analysis (TGA) and shows its potential as a renewable energy sources. A set of data were collected from the thermal reaction and plotted in mass or percentage of the initial mass against either temperature or time, respectively. In the thermogravimetric analysis, mass, temperature and time were considered as base measurements and important data for derivative thermogravimetric (DTG) curve were analysed while many additional measures could be derived from these three base measurements. It was observed that heating rate of 8.5°C/min and air flow rate of 85mL/min provided a maximum weight loss rate of 0.209%/°C at the temperature of 313.5°C and the derivative weight peak of -0.1895mg/°C at 292°C. The time taken to reach the maximum temperature of 899.9°C was 46.74 minutes, and ΔT endo-up reflected minimum point of -0.2°C at 15.82 minutes and maximum ΔT endo-up of 888°C at 42 minutes. Heat flow endo-up also showed that the minimum heat flow was 15.39mW at 15.85 minutes and reaching the peak heat flow endo-up of 47.73mW at 43.27 minutes.

scholarly journals Study on Aqueous Enzymatic Extraction Process of Common Pistache Oil

2021 ◽  
Vol 251 ◽  
pp. 02058
Author(s):  
Feng Xuehua ◽  
Tao Ali ◽  
Song Zurong ◽  
Gong Panpan
Keyword(s):  
Ph Value ◽  
Orthogonal Experiment ◽  
Extraction Process ◽  
Optimal Time ◽  
Process Conditions ◽  
Optimal Process ◽  
Enzymatic Extraction ◽  
Hydrolysis Time ◽  
Aqueous Enzymatic Extraction ◽  
The Common

The aqueous enzymatic method was applied to extract the common pistache oil and the optimal extraction process conditions were identified. By observing the effect of enzymatic hydrolysis time, pH value, temperature on aqueous enzymatic extraction process and performing the orthogonal experiment based on the single factor test, the optimal process parameters were obtained, namely, the optimal time, temperature, and pH value were respectively 3 h, 50℃, and 7 with a final extraction rate of 25.38 %.

scholarly journals Factors Affecting Post-surgical Body Weight Loss Rate of Patients with Colorectal Cancer

2018 ◽  
Vol 33 (4) ◽  
pp. 605-609
Author(s):  
Hiroki YABE ◽  
Mizuki TSUKAMOTO ◽  
Shihomi TAKEUCHI ◽  
Sayaka ITO ◽  
Kan OMI ◽  
...  
Keyword(s):  
Colorectal Cancer ◽  
Weight Loss ◽  
Body Weight ◽  
Loss Rate ◽  
Body Weight Loss ◽  
Weight Loss Rate ◽  
Factors Affecting

Hydrochloric Acid Corrosion Behavior of Nb2O5-Al2O3 Ceramics Prepared by Microwave Sintering

2011 ◽  
Vol 418-420 ◽  
pp. 55-58 ◽  
Author(s):  
Yun Long Ai ◽  
Fei He ◽  
Bing Liang Liang ◽  
Wen He ◽  
Li Liu
Keyword(s):  
Hydrochloric Acid ◽  
Loss Rate ◽  
Sintering Temperature ◽  
Acid Corrosion ◽  
Microwave Sintering ◽  
Kelvin Probe ◽  
Weight Loss Rate ◽  
Sintering Time ◽  
Ceramic Samples ◽  
Corrosion Behaviors

The influences of Nb2O5on the phase, microstructure and hydrochloric acid corrosion behaviors of Nb2O5-Al2O3ceramics sintered with 2.45 GHz microwave energy were investigated. The results showed that Nb2O5 reacted completely with Al2O3to form AlNbO4and densified the pure Al2O3at a lower sintering temperature and in a short sintering time. Nb2O5-Al2O3ceramic samples were corroded in diverse concentration hydrochloric acid for different time. Weight loss rate of Nb2O5-Al2O3ceramic rose dramatically when the corrosion time was not longer than 4 h, and it increased slowly beyond 24 h. After Nb2O5-Al2O3ceramic samples were corroded for 1 h, pitting corrosion was observed by scanning electric microscope, which was consistent with the analysis results of the scanning Kelvin Probe.

scholarly journals Biocontrol of Pear Postharvest Decay by Kombucha

2019 ◽  
Vol 47 (3) ◽  
Author(s):  
Junping TAN ◽  
Xian ZHOU ◽  
Shuiyuan CHENG ◽  
Zexiong CHEN ◽  
Yuanyuan GOU ◽  
...  
Keyword(s):  
Weight Loss ◽  
Electric Conductivity ◽  
Room Temperature ◽  
Loss Rate ◽  
Economic Benefits ◽  
Control Group ◽  
Pear Fruit ◽  
Weight Loss Rate ◽  
Post Harvest ◽  
Mda Content

Kombucha is sweetened, slightly alcoholic, and lightly effervescent tea drink. Its acidity inhibits the growth of harmful bacteria. Here, we studied effect of kombucha on post-harvest preservation of pear. The Hosui pears were soaked with the kombucha for 15 minutes, and in distilled water as the control, respectively. Superoxide dismutase (SOD), peroxidase (POD), malondialdehyde (MDA), hydrogen peroxide (H2O2), proline content, electric conductivity, weight loss rate and good fruit rate in pear were measured during storage at room temperature. The results showed that the kombucha could effectively prolong the storage time of pear fruit. The fruit quality of the treated group was 1.5 times higher than that of the control pear fruit when stored at room temperature for 18 days. The weight loss rate, MDA content and electric conductivity of the treatment group were lower than those of the control group during the whole storage period, indicating that kombucha can inhibit the transformation of polysaccharides such as starch and pectin, and delay the degradation of nutrients in the fruit, resulting in a decrease in weight loss rate, inhibition of membrane lipid peroxidation, reducing MDA content, electric conductivity, maintaining cell membrane stability, delaying pear fruit senescence. Kombucha can inhibit the content of H2O2 and proline, increase the activity of POD and SOD increase the storage stability of fruits. The purpose of this study was to elucidate the physiological mechanism of post-harvest preservation of pear by kombucha. The use of kombucha can prolong the supply period of pear, increase economic benefits and expand the market of pear.   ********* In press - Online First. Article has been peer reviewed, accepted for publication and published online without pagination. It will receive pagination when the issue will be ready for publishing as a complete number (Volume 47, Issue 3, 2019). The article is searchable and citable by Digital Object Identifier (DOI). DOI link will become active after the article will be included in the complete issue. *********

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