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You searched for: Subject term alkali treatment Remove constraint Subject term: alkali treatment Subject term absorbance Remove constraint Subject term: absorbance Text availability Citation in PubAg Remove constraint Text availability: Citation in PubAg
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1. A Unique Bacterial Pelletized Cultivation Platform in Rhodococcus opacus PD630 Enhanced Lipid Productivity and Simplified Harvest for Lignin Bioconversion

Author:
Bing Xu; Qiang Li; Yuanqiao Pu; Shangxian Xie; Arthur J. Ragauskas; Jorge Arreola-Vargas; Zhi-Hua Liu; Joshua S. Yuan
Source:
ACS sustainable chemistry & engineering 2022 v.10 no.3 pp. 1083-1092
ISSN:
2168-0485
Subject:
Rhodococcus opacus; absorbance; agitation; alkali treatment; bacteria; biomass; biotransformation; carbon; carbon nitrogen ratio; centrifugation; energy; fermentation; flocculants; green chemistry; lignin; lipid content; lipids; liquids; nitrogen content; pelleting; pellets; total soluble solids; viscosity
Abstract:
... Pelletized liquid cultivation has been widely explored because of its advantages in biomanufacturing, such as easier biomass harvesting, higher product yield, and lower medium viscosity and energy consumption. In this study, we discovered that the nonfilamentous bacterium Rhodococcus opacus PD630 could form pellets during the fermentation of alkaline pretreatment liquor containing lignin as a carb ...
DOI:
10.1021/acssuschemeng.1c05239

2. Continuous production of uniform chitosan beads as hemostatic dressings by a facile flow injection method

Author:
Boxuan Li; Juan Wang; Qin Gui; Hu Yang
Source:
Journal of materials chemistry B 2020 v.8 no.35 pp. 7941-7946
ISSN:
2050-7518
Subject:
absorbance; acetates; alkali treatment; blood coagulation; chitosan; crosslinking; cytotoxicity; ethanol; fibroblasts; freeze drying; hemostasis; ionic liquids; swine
Abstract:
... In this work, we developed a facile flow injection method to fabricate chitosan beads of uniform size in a continuous manner and assessed their properties as hemostatic dressings. Chitosan was dissolved into the ionic liquid 1-ethyl-3-methylimidazolium acetate (EMIM Ac) to form a solution, and then the chitosan/EMIM Ac solution was flow injected into ethanol to form beads of uniform size. The form ...
DOI:
10.1039/d0tb01462a

3. Deconstruction of Pine Wood (Pinus sylvestris) Recalcitrant Structure Using Alkali Treatment for Enhancing Enzymatic Saccharification Evaluated by Congo Red

Author:
Dhirendra Nath Barman; Md. Azizul Haque; Md. Murad Hossain; Shyamal Kumar Paul; Han Dae Yun
Source:
Waste and biomass valorization 2020 v.11 no.5 pp. 1755-1764
ISSN:
1877-2641
Subject:
Fourier transform infrared spectroscopy; Pinus sylvestris; X-ray diffraction; absorbance; adsorption; alkali treatment; cellulose; cellulosic fibers; endo-1,4-beta-glucanase; microstructure; reducing sugars; saccharification; scanning electron microscopy; sodium hydroxide; spectrophotometers; wood; wood anatomy; wood treatment
Abstract:
... PURPOSE: The changes of pine wood structure were evaluated based on Congo red (CR) adsorption in this study. Cellulose free –OH group act as electron acceptor and CR amino or azo group as electron donor that interacts each other to form H–bonds. This interaction of CR with cellulose is considered in this study to analyze the structural changes of pine wood. METHODS: Pine wood samples were treated ...
DOI:
10.1007/s12649-018-00547-z

4. Crystallization and alkaline hydrolysis of poly(3- hydroxybutyrate) films probed by thermal analysis and infrared spectroscopy

Author:
Asish Tapadiya; Nadarajah Vasanthan
Source:
International journal of biological macromolecules 2017 v.102 pp. 1130-1137
ISSN:
0141-8130
Subject:
3-hydroxybutyric acid; Fourier transform infrared spectroscopy; absorbance; alkali treatment; alkaline hydrolysis; crystal structure; crystallization; microstructure; nuclear magnetic resonance spectroscopy; polymers; temperature; thermal analysis; weight loss
Abstract:
... Poly(3-hydroxybutyrate) (PHB) is a microbially synthesized polymer, which is often purified by alkaline treatment. The effect of microstructure on alkaline hydrolysis has been studied by varying concentration of base and the temperature. The morphologies of PHB films before and after degradation were evaluated using DSC and FTIR spectroscopy. The hydrolytic degradation study by weight loss measure ...
DOI:
10.1016/j.ijbiomac.2017.04.095

5. Effects of organic liquids on coking properties of a higher-inert Western Canadian coal

Author:
Maria E. Holuszko; W. Ross Leeder; Melanie Mackay; Louis Giroux; Tony MacPhee; Ka Wing Ng; Heather Dexter
Source:
Fuel processing technology 2017 v.155 pp. 225-231
ISSN:
0378-3820
Subject:
Fourier transform infrared spectroscopy; absorbance; alkali treatment; carbon; carbon dioxide; carbonization; coal; gasification; gravity; hardness; oxidation; rheology; specific gravity; storage time; tetrachloroethylene; transmittance; Canada
Abstract:
... The effect of organic liquids (white spirit, perchloroethylene and methylene bromide) typically used in float/sink gravity separations (specific gravity 1.4–1.8) on the fundamental properties of a higher-inert Western Canadian metallurgical coal of mvb rank (Romax 1.22) and its resultant coking ability were examined. Over a 6-month period, untreated (control) and treated coal were characterized us ...
DOI:
10.1016/j.fuproc.2016.06.021

6. Chemical and structural analysis of alkali pretreated pinewood for efficient ethanol production

Author:
Mahboubeh S. Noori; Keikhosro Karimi
Source:
RSC advances 2016 v.6 no.70 pp. 65683-65690
ISSN:
2046-2069
Subject:
Fourier transform infrared spectroscopy; absorbance; adsorption; alkali treatment; buffering capacity; cellulases; cellulose; crystal structure; enzymatic hydrolysis; ethanol; ethanol production; fermentation; glucose; lignin content; nonionic surfactants; pH; polysorbates; scanning electron microscopy; sodium hydroxide; softwood; temperature
Abstract:
... Improvement of enzymatic hydrolysis and ethanol production from softwood pine was conducted by pretreatment with 8% (w/v) NaOH at different temperatures of 0, 25, and 80 °C for 2 h. Compared with the untreated wood, the lowest temperature resulted in the highest improvement of 271.1 and 218.2% in glucose and ethanol production yields, respectively. In addition to the pretreatment, Tween-20 as a no ...
DOI:
10.1039/c6ra11486e

7. Comparison between solid-state and powder-state alkali pretreatment on saccharification and fermentation for bioethanol production from rice straw

Author:
Shabina Yeasmin; Chul-Hwan Kim; Shah Md. Asraful Islam; Ji-Young Lee
Source:
Preparative biochemistry & biotechnology 2016 v.46 no.3 pp. 229-237
ISSN:
1532-2297
Subject:
Fourier transform infrared spectroscopy; absorbance; alkali treatment; atomic force microscopy; biomass; ethanol; ethanol fermentation; ethanol production; glucose; hydrolysis; lignin; rice straw; saccharification; scanning electron microscopy; sodium hydroxide
Abstract:
... The efficacy of different concentrations of NaOH (0.25%, 0.50%, 0.75%, and 1.00%) for the pretreatment of rice straw in solid and powder state in enzymatic saccharification and fermentation for the production of bioethanol was evaluated. A greater amount of biomass was recovered through solid-state pretreatment (3.74 g) from 5 g of rice straw. The highest increase in the volume of rice straw powde ...
DOI:
10.1080/10826068.2015.1015563

8. Physicochemical and structural evaluation of alkali extracted chickpea starch as affected by γ-irradiation

Author:
Mudasir Bashir; Sundaramoorthy Haripriya
Source:
International journal of biological macromolecules 2016 v.89 pp. 279-286
ISSN:
0141-8130
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; absorbance; alkali treatment; amylose; chickpeas; correlation; cracking; crystal structure; gamma radiation; glycosides; irradiation; pasting properties; scanning electron microscopy; solubility; starch granules; swelling (materials); temperature; turbidity; viscosity
Abstract:
... In this study, starch isolated from chickpea was exposed to gamma-irradiation at 0, 4, 8 and 12kGy doses. The irradiated starches were evaluated for their physicochemical, morphological and pasting properties. The results revealed significant (p≤0.05) reduction in apparent amylose content, swelling power, turbidity, syneresis, L (lightness) value, and pasting parameters whereas solubility and b (y ...
DOI:
10.1016/j.ijbiomac.2016.04.080

9. A novel method for rapid determination of alpha-cellulose content in dissolving pulps by visible spectroscopy

Author:
Liang He; Li-Ping Xin; Xin-Sheng Chai; Jing Li
Source:
Cellulose 2015 v.22 no.4 pp. 2149-2156
ISSN:
0969-0239
Subject:
Eucalyptus; absorbance; alkali treatment; cellulose; colloids; ethanol; filtrates; industrial applications; least squares; linear models; prediction; pulp; rapid methods; ultraviolet-visible spectroscopy
Abstract:
... A novel method has been developed for the rapid determination of the alpha-cellulose content in dissolving pulps. After alkaline treatment of the sample, the alkaline-soluble portion of the filtrate was transformed into colloids in a medium containing ethanol (80 %). The colloid solution was then measured by visible spectroscopy. The results showed a linear correlation between the root of absorban ...
DOI:
10.1007/s10570-015-0652-9

10. Comparative susceptibilities to alkali-treatment of A-, B- and C-type starches of Dioscorea zingiberensis, Dioscorea persimilis and Dioscorea opposita

Author:
Qianqian Jiang; Wenyuan Gao; Xia Li; Shuli Man; Yanpeng Shi; Yixi Yang; Luqi Huang; Changxiao Liu
Source:
Food hydrocolloids 2014 v.39 pp. 286-294
ISSN:
0268-005X
Subject:
Dioscorea oppositifolia; Dioscorea persimilis; Dioscorea zingiberensis; Fourier transform infrared spectroscopy; absorbance; adhesion; alkali treatment; amylose; crystal structure; hydrocolloids; in vitro digestibility; resistant starch; solubility; starch granules; swelling (materials)
Abstract:
... The effect of alkali-treatment for 0, 15, and 30 days at 35 °C on amylose content, morphological properties, crystalline properties, swelling power, solubility, absorbance spectra and in vitro digestibility of starches from Dioscorea zingiberensis, Dioscorea persimilis and Dioscorea opposita were investigated. The amylose content of all the three starches decreased after 15 days of alkaline treatm ...
DOI:
10.1016/j.foodhyd.2014.01.012

11. Alkali treatment of cotton yarns with ultrasonic bath

Author:
Ramin Khajavi; Aramesh Atlasi; Mohammad-Esmail Yazdanshenas
Source:
Textile research journal v.83 no.8 pp. 827-835
ISSN:
1746-7748
Subject:
absorbance; alkali treatment; cotton; crystal structure; fabrics; hydrogen bonding; mercerization; microstructure; sodium hydroxide; temperature; textile fibers; ultrasonics; yarns
Abstract:
... In this study, the effects of ultrasound on the conventional mercerization treatment of cotton yarns were investigated. The yarns were treated in slack and under tension conditions with sodium hydroxide at various times (5 and 10 min) and temperatures (0, 20, 40 and 60℃) with and without the presence of ultrasound waves. The microstructure of samples were analyzed under characteristic absorbance a ...
DOI:
10.1177/0040517512467077

12. Carrier mediated transport solvent bar microextraction for preconcentration and determination of dexamethasone sodium phosphate in biological fluids and bovine milk samples using response surface methodology

Author:
Katayoun Mahdavi Ara; Zahra Akhoondpouramiri; Farhad Raofie
Source:
Journal of Chromatography B 2013 v.931 pp. 148-156
ISSN:
1570-0232
Subject:
absorbance; active transport; alkali treatment; detection limit; dexamethasone; high performance liquid chromatography; humans; ionic strength; liquid-phase microextraction; milk; mixing; pH; response surface methodology; sodium phosphate; solvents; urine
Abstract:
... In the current study, a fast and simple preconcentration and sample clean up procedure was developed based on carrier mediated three phase solvent bar liquid phase microextraction (TPSB-LPME) method prior to high performance liquid chromatography (HPLC) equipped with an ultraviolet (UV) absorbance detector for simultaneous extraction and determination of trace amounts of dexamethasone sodium phosp ...
DOI:
10.1016/j.jchromb.2013.05.022

13. Penicillium sp. strain that efficiently adsorbs lignosulfonate in the presence of sulfate ion

Author:
Akihisa Aoyama; Ryuichiro Kurane; Kazuo Nagai
Source:
Journal of bioscience and bioengineering 2013 v.115 pp. 279-283
ISSN:
1389-1723
Subject:
Penicillium; absorbance; alkali treatment; culture media; decolorization; lignin; lignosulfonates; physical properties; sediments; solubilization; spores; sulfates
Abstract:
... Lignin is one of the major water insoluble substances that support the physical properties of plants and can be solubilized by sulfite or alkaline treatment in accordance with pulpification. The lignin derivatives produced by both the sulfite and the kraft processes are called lignosulfonate (LS) and kraft lignin (KL), respectively, and both derivatives show a broad spectrum of optical absorbance ...
DOI:
10.1016/j.jbiosc.2012.09.019

14. Streptomyces griseorubens mediated delignification of paddy straw for improved enzymatic saccharification yields

Author:
M. Saritha; Anju Arora; Surender Singh; Lata Nain
Source:
Bioresource technology 2013 v.135 pp. 12-17
ISSN:
0960-8524
Subject:
Streptomyces griseorubens; absorbance; alkali treatment; biomass; carbohydrate content; cellulose; delignification; enzymatic hydrolysis; lignin; paddies; saccharification; solid state fermentation; straw; sugars; white-rot fungi
Abstract:
... Biological pretreatment of paddy straw was carried out using an actinomycete isolate, identified as Streptomyces griseorubens ssr38, for delignification under solid state fermentation and enhanced sugar recovery by enzymatic saccharification. After 10days incubation, the inoculated paddy straw was extracted with mild alkali and high absorbance at 205nm was shown by the extracts indicating the abil ...
DOI:
10.1016/j.biortech.2012.11.040
PubMed:
23265820

15. Accurate quantification of astaxanthin from Haematococcus crude extract spectrophotometrically

Author:
Yeguang Li; Fengping Miao; Yahong Geng; Dayan Lu; Chengwu Zhang; Mingtao Zeng
Source:
Chinese journal of oceanology and limnology 2012 v.30 no.4 pp. 627-637
ISSN:
0254-4059
Subject:
Haematococcus; absorbance; absorption; alkali treatment; astaxanthin; chlorophyll; dimethyl sulfoxide; spectrophotometers; wavelengths
Abstract:
... The influence of alkali on astaxanthin and the optimal working wave length for measurement of astaxanthin from Haematococcus crude extract were investigated, and a spectrophotometric method for precise quantification of the astaxanthin based on the method of Boussiba et al. was established. According to Boussiba’s method, alkali treatment destroys chlorophyll. However, we found that: 1) caroteno ...
DOI:
10.1007/s00343-012-1217-5

16. Modified Lignification in the Cell Walls of Cad Depressed Poplars

Author:
A. Yoshinaga; M. Wada; M. Fujital; B. Chabbert; G. Pilate
Source:
IAWA journal v.28 no.4 pp. 457-471
ISSN:
0928-1541
Subject:
Populus; absorbance; aldehydes; alkali treatment; cell walls; cinnamyl alcohol dehydrogenase; lignification; lignin; moieties; sodium borohydride; spectroscopy; transgenic plants; trees; wood anatomy; wood fibers; xylem vessels
Abstract:
... Ultraviolet microscopic spectrophotometry was used to investigate lignification in the secondary cell walls of wood fibers and vessel elements from either wild type or transgenic poplars with depressed activity of cinnamyl alcohol dehydrogenase (CAD). A distinct shoulder at 330 nm was characteristic of the transgenic poplar. Measurements performed after 1) a mild alkali treatment or 2) areduction ...
DOI:
10.1163/22941932-90001655

17. Absorbent polymers from starch and flour through graft polymerization of acrylonitrile and comonomer mixtures

Author:
Fanta, G.F.; Burr, R.C.; Doane, W.M.; Russell, C.R.
Source:
Stärke = 1978 v.30 no.7 pp. 237-242
ISSN:
0038-9056
Subject:
corn flour; wheat flour; polymers; polymerization; corn starch; absorbents; nitriles; saponification; drying; absorbance; alkali treatment; corn meal; wheat starch
Handle:
10113/26595