scholarly journals Optimization of Bromelain Treatment pH with Wool for Antifelting and Reduced Pilling Behaviour: Objective Assessment Approach

2015 ◽  
Vol 2015 ◽  
pp. 1-7 ◽  
Author(s):  
Amandeep Kaur ◽  
J. N. Chakraborty

Wool fabric possesses unique properties like resiliency, warmth, wide aesthetic qualities, and comfort. However, felting-shrinkage and pilling tendency of wool after wear and repeated launderings are its inherent limitations. Proteolytic enzymes are extensively used as biocatalysts for eco-friendly wool antifelting treatments. However, uncontrolled wool protein hydrolysis by protease may lead to excessive weight loss leading to weakening of fiber and reduction in its tensile value, which further have detrimental effect on the pilling propensity of protease treated wool during use of woolen textiles. Optimum selection of protease treatment parameters like concentration, pH, temperature, and so forth can help in controlled reaction to achieve the desired effect, which generally involves cumbersome sampling and analysis. Optimization for pH of bromelain (proteolytic enzyme having activity in acidic conditions) treatment with wool has been done while aiming at the desired areawise shrinkage value, minimum weight loss, and reduced pilling by using standard methods and objective fast Fourier transformation technique for pilling evaluation specifically.

2012 ◽  
Vol 441 ◽  
pp. 294-298
Author(s):  
Jiu Gang Yuan ◽  
Xue Rong Fan ◽  
Qiang Wang ◽  
Ping Wang

In the paper, wool samples were pretreated by [BmiCl ionic liquid, followed by protease. The effect of ionic liquid pretreatment on the enzymatic shrink-resistant finishing of wool fabrics was studied. The results showed that the epicuticle was damaged by pretreatment, and the wettability of wool fabric was improved. These changes of wool surface made a promotional effect on proteolytic reactions. They could remarkably improve the accessibility of protease and thus increasing the efficiency of protease treatment. The weight loss of the sample pretreated with ionic liquid was dramatically increased, and the encouraging shrink-resistance was also achieved after the combination of ionic liquid and protease treatments.


2012 ◽  
Vol 531-532 ◽  
pp. 8-12
Author(s):  
M.A. Sai Balaji ◽  
K. Kalaichelvan

Organic fibres (Kevlar/ Arbocel / Acrylic) have good thermal stability, higher surface area and bulk density. The optimization of organic fibres percentage for thermal behaviour is considered using TGA. The temperature raise during brake application will be between 150-4000 C and this temperature zone is very critical to determine the fade characteristics during friction testing. Hence, three different friction composites are developed with the same formulation varying only the Kevlar, Arbocel and Acrylic fibres which are compensated by the inert filler namely the barites and are designated as NA01, NA02 and NA03 respectively. After the fabrication, the TGA test reveals that the composite NA03 has minimum weight loss. The friction coefficient test rig is then used to test the friction material as per SAE J661a standards. The results prove that the brake pad with minimum weight loss during TGA has higher friction stability. Thus, we can correlate the thermal stability with the stability of friction.


2015 ◽  
Vol 12 (3) ◽  
pp. 26-30
Author(s):  
Valeriy Nikolaevich Egiev ◽  
Yuliya Borisovna Mayorova ◽  
Evgeniy Aleksandrovich Zorin ◽  
Anastasiya Vladimirovna Мелеshko ◽  
Ekaterina Sergeevna Orlovskaya

The results of surgical treatment of morbid obesity usually considers a variety of factors and the main attention is paid to the dynamics of body weight after surgery. It is generally accepted that in the absence of reducing excess body weight or with minimum weight loss (a few kilograms), the result is considered unsatisfactory. The aim of the work was to compare an objective assessment of gastric bypass (GBS) and gastric banding (GB) and the subjective evaluation of treatment effectiveness by patients themselves. The study included 457 (69.7%) patients that underwent GB and 198 (30.3%) patients after GBS. At the late postoperative period 243 patients (53.2%) were available after the GB and 112 (56.6%) patients after GBS. The frequency of matches between objective and subjective assessment of outcomes of surgery usually did not exceed 50%. Given this, there is a need for a comprehensive analysis of the results of bariatric surgery. Developed multicomponent scale allows to evaluate the effectiveness of any bariatric surgery.


2012 ◽  
Vol 441 ◽  
pp. 249-254 ◽  
Author(s):  
Edward Smith ◽  
Jin Song Shen

Wool was treated with cetyltrimethylammonium bromide (CTAB) under alkaline conditions to remove the lipid layer from the fibre surface. A reduction in lipid content of 88% could be achieved resulting in a very hydrophilic fibre. The efficiency of dyeing with reactive dyes was improved. When treated with proteolytic enzymes (protease) a loss of enzyme activity occurred due to residual CTAB on the fibre surface. Residual CTAB could be removed from the fibre using solvent or anionic surfactant in acid conditions ensuring enzyme activity. Hydrophilic wool could promote a more efficient proteolytic enzyme treatment process.


1995 ◽  
Vol 5 (4) ◽  
pp. 282
Author(s):  
G. L. Landry ◽  
R. A. Oppliger ◽  
S. W. Foster ◽  
A. C. Lambrecht

2011 ◽  
Vol 12 (6) ◽  
pp. 816-820 ◽  
Author(s):  
Asimananda Khandual ◽  
Ameersing Luximon ◽  
Ajit Kumar Pattanayak

2015 ◽  
Vol 39 (6) ◽  
pp. 847-855 ◽  
Author(s):  
Rafael A. Couto ◽  
Joshua T. Waltzman ◽  
Kashyap K. Tadisina ◽  
Steven Rueda ◽  
Bryson G. Richards ◽  
...  

Author(s):  
Hayder Jumaah Al-Kaabi

Barhi Dates are an important food and often consumed and sold in the market during the stage Khalal, when the colour is yellow and their taste is sweet with the disappearance of their astringent taste. During the Khalal stage, these dates become physiologically mature with gives the sweet taste. For this reason, they are sold and consumed in a short period of time before these fruits turn into Rutab, a stage at which they lose that distinguishing characteristic. The high moisture, rapid ripening, and delays in transportation or improper storage conditions quickly result in Rutab stage. Thus The Khalal stage lasts for a short time until the fruits get ripe. In the present study, Barhi Khalals were packaged in air (control) and by two types of modified atmosphere packaging: MAP A (5% O2+ 20% CO2 and 75% N2) and MAP B (40% O2+ 20% CO2 and 40% N2). Afterwards, all samples were stored at 5°C for 30 days. On days zero, 10, 20 and 30 of storage, the fruits were evaluated in terms of the changes in the quality indices of weight loss, colour, Total Soluble Solids (TSS), and firmness of the fruits and sensory features. The results showed that the minimum weight loss was 0.45% in modified atmosphere packaging, especially with MAP A and the minimum increase in the TSS was 37.35 Brix° after 30 days of the storage. On the other hand, the results for firmness, colour, and sensory evaluation were better with control packaging.


2021 ◽  
Author(s):  
Maialen Zelaia Amilibia ◽  
Camilo Cortes ◽  
Alvaro Bertelsen Simonetti ◽  
Alaitz Satrustegi ◽  
Miren Iturburu ◽  
...  

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Justyna Berniak-Woźny ◽  
Marek Szelągowski

PurposeThe purpose of this study is to give an in-depth understanding of the nature of business processes (BPs) from the perspective of their dynamism and knowledge intensity that will allow for their correct classification and provide practical and useful implications for their more relevant and effective management. A simple and low labor-intensive BP nature assessment approach is proposed that will allow for objective assessment and internal benchmarking of all BPs in a specific context of execution based on their nature.Design/methodology/approachThe research is divided into two parts. The first comprises a systematic literature review (SLR) based on the resources of the ProQuest, Springer Nature and ScienceDirect full-text databases and the second includes illustrative case studies.FindingsBuilding on the SLR, the authors identified and reviewed 3,385 articles and defined a set of criteria by which the nature of BPs can be assessed. Further, the authors proposed a BP nature assessment matrix together with complementary questionnaires for the evaluation of process dynamism and knowledge intensity. To demonstrate the logic of this approach, two illustrative case studies were presented.Originality/valueThe article contributes to the theoretical reflection on the nature of BPs in the knowledge economy. From the practical point of view, a novel approach to the assessment of the nature of BPs is offered. The approach is open and as experience is accumulated it will develop according to the data and recommendations collected.


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