Development of technological process of cotton cellulose production and evaluation of experimental results

In the course of this study, the technology of bleaching of cotton pulp for various purposes has been improved, which can be used in the production of cotton pulp by "Khlopoprom-Cellulose" LLP and other enterprises to increase the production efficiency and competitiveness of the products obtained. The proposed development makes it possible to obtain cellulose with a high degree of polymerization and whiteness, as well as to solve the problem of stabilization and high decomposition rate of hydrogen peroxide in the technological cycle. The bleached cellulose meets the requirements of GOST (State Standard) 595-79 "Cotton cellulose" and has an average degree of whiteness of 90%, which is 5-6% higher than the samples of cotton cellulose bleached without the use of a hydrogen peroxide stabilizer.

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Use of Electrosprayed Agave Fructans as Nanoencapsulating Hydrocolloids for Bioactives

Nanomaterials ◽

10.3390/nano8110868 ◽

2018 ◽

Vol 8 (11) ◽

pp. 868 ◽

Cited By ~ 10

Author(s):

Jorge Ramos-Hernández ◽

Juan Ragazzo-Sánchez ◽

Montserrat Calderón-Santoyo ◽

Rosa Ortiz-Basurto ◽

Cristina Prieto ◽

...

Keyword(s):

Uv Light ◽

Particle Morphology ◽

Bioactive Compound ◽

Processing Parameters ◽

Degree Of Polymerization ◽

Spherical Particles ◽

Sem Images ◽

High Degree ◽

Thermal Stability Of ◽

Β Carotene

High degree of polymerization Agave fructans (HDPAF) are presented as a novel encapsulating material. Electrospraying coating (EC) was selected as the encapsulation technique and β-carotene as the model bioactive compound. For direct electrospraying, two encapsulation methodologies (solution and emulsion) were proposed to find the formulation which provided a suitable particle morphology and an adequate concentration of β-carotene encapsulated in the particles to provide a protective effect of β-carotene by the nanocapsules. Scanning electron microscopy (SEM) images showed spherical particles with sizes ranging from 440 nm to 880 nm depending on the concentration of HDPAF and processing parameters. FTIR analysis confirmed the interaction and encapsulation of β-carotene with HDPAF. The thermal stability of β-carotene encapsulated in HDPAF was evidenced by thermogravimetric analysis (TGA). The study showed that β-carotene encapsulated in HDPAF by the EC method remained stable for up to 50 h of exposure to ultraviolet (UV) light. Therefore, HDPAF is a viable option to formulate nanocapsules as a new encapsulating material. In addition, EC allowed for increases in the ratio of β-carotene:polymer, as well as its photostability.

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A comparison of atmospheric composition using the Carbon Bond and Regional Atmospheric Chemistry Mechanisms

Atmospheric Chemistry and Physics Discussions ◽

10.5194/acpd-13-6923-2013 ◽

2013 ◽

Vol 13 (3) ◽

pp. 6923-6969 ◽

Cited By ~ 2

Author(s):

G. Sarwar ◽

J. Godowitch ◽

B. Henderson ◽

K. Fahey ◽

G. Pouliot ◽

...

Keyword(s):

Hydrogen Peroxide ◽

Atmospheric Chemistry ◽

Production Efficiency ◽

Fine Particles ◽

Secondary Organic Aerosols ◽

Organic Aerosols ◽

Ozone Production ◽

Atmospheric Composition ◽

Organic Nitrate ◽

Carbon Bond

Abstract. We incorporate the recently developed Regional Atmospheric Chemistry Mechanism (version 2, RACM2) into the Community Multiscale Air Quality modeling system for comparison with the existing 2005 Carbon Bond mechanism with updated toluene chemistry (CB05TU). Compared to CB05TU, RACM2 enhances the domain-wide monthly mean hydroxyl radical concentrations by 46% and nitric acid by 26%. However, it reduces hydrogen peroxide by 2%, peroxyacetic acid by 94%, methyl hydrogen peroxide by 19%, peroxyacetyl nitrate by 40%, and organic nitrate by 41%. RACM2 predictions generally agree better with the observed data than the CB05TU predictions. RACM2 enhances ozone for all ambient levels leading to higher bias at low (< 60 ppbv) concentrations but improved performance at high (>70 ppbv) concentrations. The RACM2 ozone predictions are also supported by increased ozone production efficiency that agrees better with observations. Compared to CB05TU, RACM2 enhances the domain-wide monthly mean sulfate by 10%, nitrate by 6%, ammonium by 10%, anthropogenic secondary organic aerosols by 42%, biogenic secondary organic aerosols by 5%, and in-cloud secondary organic aerosols by 7%. Increased inorganic and organic aerosols with RACM2 agree better with observed data. While RACM2 enhances ozone and secondary aerosols by relatively large margins, control strategies developed for ozone or fine particles using the two mechanisms do not differ appreciably.

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Acetylation of Bacterial Cellulose: Preparation of Cellulose Acetate Having a High Degree of Polymerization

Bioscience Biotechnology and Biochemistry ◽

10.1271/bbb.62.1451 ◽

1998 ◽

Vol 62 (7) ◽

pp. 1451-1454 ◽

Cited By ~ 13

Author(s):

Mari TABUCHI ◽

Kunihiko WATANABE ◽

Yasushi MORINAGA ◽

Fumihiro YOSHINAGA

Keyword(s):

Cellulose Acetate ◽

Bacterial Cellulose ◽

Degree Of Polymerization ◽

High Degree

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Comparison of anti-hyperglycemic activities between low- and high-degree of polymerization procyanidin fractions from cacao liquor extract

Journal of Food and Drug Analysis ◽

10.38212/2224-6614.2105 ◽

2020 ◽

Vol 20 (1) ◽

Author(s):

Y. Yamashita ◽

M. Okabe ◽

M. Natsume ◽

H. Ashida

Keyword(s):

Degree Of Polymerization ◽

High Degree

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Anatomy and fructan distribution in vegetative organs of Dimerostemma vestitum (Asteraceae) from the campos rupestres

Anais da Academia Brasileira de Ciências ◽

10.1590/0001-3765201520140214 ◽

2015 ◽

Vol 87 (2) ◽

pp. 797-812 ◽

Cited By ~ 8

Author(s):

Taiza M. Silva ◽

Divina A.A. Vilhalva ◽

Moemy G. Moraes ◽

Rita de Cássia L. Figueiredo-Ribeiro

Keyword(s):

Glandular Trichomes ◽

Polarized Light ◽

Degree Of Polymerization ◽

Campos Rupestres ◽

Water Restriction ◽

Secretory Structures ◽

Vegetative Organs ◽

Semi Arid Region ◽

Aerial Stem ◽

High Degree

Among the compounds stored by plants, several functions are assigned to fructans, such as source of energy and protection against drought and extreme temperatures. In the present study we analyzed the anatomy and distribution of fructans in vegetative organs of Dimerostemma vestitum (Asteraceae), an endemic species from the Brazilian campos rupestres. D. vestitum has amphistomatic and pubescent leaves, with both glandular and non-glandular trichomes. In the basal aerial stem the medulla has two types of parenchyma, which differ from the apical portion. The xylopodium has mixed anatomical origin. Interestingly, although inulin-type fructans with high degree of polymerization were found in all analyzed organs except the leaves, the highest amount and maximum degree of polymerization were detected in the xylopodium. Inulin sphero-crystals were visualized under polarized light in the medulla and in the vascular tissues mainly in the central region of the xylopodium, which has abundant xylem parenchyma. Secretory structures accumulating several compounds but not inulin were identified within all the vegetative organs. The presence of these compounds, in addition to inulin, might be related to the strategies of plants to survive adverse conditions in a semi-arid region, affected seasonally by water restriction and frequently by fire.

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Automated Multi-Sensor 3D Reconstruction for the Web

ISPRS International Journal of Geo-Information ◽

10.3390/ijgi8050221 ◽

2019 ◽

Vol 8 (5) ◽

pp. 221 ◽

Cited By ~ 8

Author(s):

Arttu Julin ◽

Kaisa Jaalama ◽

Juho-Pekka Virtanen ◽

Mikko Maksimainen ◽

Matti Kurkela ◽

...

Keyword(s):

Laser Scanning ◽

Production Efficiency ◽

State Of The Art ◽

Real Life ◽

3D Models ◽

Life Project ◽

Close Range ◽

High Degree ◽

The Web ◽

3D Content

The Internet has become a major dissemination and sharing platform for 3D content. The utilization of 3D measurement methods can drastically increase the production efficiency of 3D content in an increasing number of use cases where 3D documentation of real-life objects or environments is required. We demonstrated a developed, highly automated and integrated content creation process of providing reality-based photorealistic 3D models for the web. Close-range photogrammetry, terrestrial laser scanning (TLS) and their combination are compared using available state-of-the-art tools in a real-life project setting with real-life limitations. Integrating photogrammetry and TLS is a good compromise for both geometric and texture quality. Compared to approaches using only photogrammetry or TLS, it is slower and more resource-heavy but combines complementary advantages of each method, such as direct scale determination from TLS or superior image quality typically used in photogrammetry. The integration is not only beneficial, but clearly productionally possible using available state-of-the-art tools that have become increasingly available also for non-expert users. Despite the high degree of automation, some manual editing steps are still required in practice to achieve satisfactory results in terms of adequate visual quality. This is mainly due to the current limitations of WebGL technology.

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Evaluation of Horseradish Peroxidase for the Treatment of Estrogenic Alkylphenols

Water Quality Research Journal ◽

10.2166/wqrj.2005.017 ◽

2005 ◽

Vol 40 (2) ◽

pp. 145-154 ◽

Cited By ~ 11

Author(s):

Monika Wagner ◽

James A. Nicell

Keyword(s):

Hydrogen Peroxide ◽

Reaction Time ◽

Horseradish Peroxidase ◽

Estrogenic Activity ◽

Complete Disappearance ◽

Reaction Products ◽

Compound A ◽

New Approach ◽

Microtox Toxicity ◽

High Degree

Abstract The xenoestrogen alkylphenols 4-nonylphenol (3.4 mg/L) and octylphenol (6.0 mg/L) were oxidized by hydrogen peroxide using horseradish peroxidase (HRP) as a biocatalyst. Substrate transformation required about one mole of peroxide per mole of phenolic compound. A high degree of conversion of alkylphenol was achieved within a 3-h reaction time. In the case of 4-nonylphenol, HRP treatment led to complete disappearance of Microtox toxicity. Results of the yeast estrogen screen (YES) assay demonstrated that the reaction products of HRP-catalyzed 4-nonylphenol conversion lacked estrogenic activity. A new approach to the YES assay has been suggested based on observations made during this study.

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