Увійти

Готові списки джерел за темами / Guar gum solution rheology / Статті в журналах

Статті в журналах з теми "Guar gum solution rheology"

Щоб переглянути інші типи публікацій з цієї теми, перейдіть за посиланням: Guar gum solution rheology.

Автор: Grafiati

Опубліковано: 14 березня 2023

Оформте джерело за APA, MLA, Chicago, Harvard та іншими стилями

Оберіть тип джерела:

Ознайомтеся з топ-50 статей у журналах для дослідження на тему "Guar gum solution rheology".

Біля кожної праці в переліку літератури доступна кнопка «Додати до бібліографії». Скористайтеся нею – і ми автоматично оформимо бібліографічне посилання на обрану працю в потрібному вам стилі цитування: APA, MLA, «Гарвард», «Чикаго», «Ванкувер» тощо.

Також ви можете завантажити повний текст наукової публікації у форматі «.pdf» та прочитати онлайн анотацію до роботи, якщо відповідні параметри наявні в метаданих.

Переглядайте статті в журналах для різних дисциплін та оформлюйте правильно вашу бібліографію.

1

Su, Ying, Yi Ding Shen, Xiao Juan Lai, and Xiao Rong Wang. "Preparation and Property of Hydrophobic Modified Guar Gum Thickener." Advanced Materials Research 631-632 (January 2013): 260–64. http://dx.doi.org/10.4028/www.scientific.net/amr.631-632.260.

Повний текст джерела

Анотація:

The modified guar gum was synthesized with guar gum as material and bromododecane as etherifying agent by suspension polymerization method. The solution and gel of the modified guar gum were also prepared. The structure and the property of the modified guar gum were analysized by Fourier transform infrared spectrum (FT-IR), X-ray diffraction (XRD) and thermogravimetric analysis (TGA). The heat resistance and the viscoelasticity modulus of the gel were also researched by rheometer. The results of FT-IR and XRD show that the hydrophobic long chain has been introduced into the guar gum successfully. TGA indicates that the modified guar gum has higher thermal stability. The rheology tests reflect that with different temperature conditions, the shear viscosity, the viscoelasticity modulus of the gel and the heat resistance of the modified guar gum are both better than that of the unmodified guar gum. The modified guar gum can be used as thickener of fracturing fluid, and it can reduce its amount.

Стилі APA, Harvard, Vancouver, ISO та ін.

2

Wientjes, Roland H. W., Michel H. G. Duits, Rob J. J. Jongschaap, and Jorrit Mellema. "Linear Rheology of Guar Gum Solutions." Macromolecules 33, no. 26 (December 2000): 9594–605. http://dx.doi.org/10.1021/ma001065p.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

3

Clinckspoor, Karl Jan, Vitor Hugo de Sousa Ferreira, and Rosangela Barros Zanoni Lopes Moreno. "Bulk rheology characterization of biopolymer solutions and discussions of their potential for enhanced oil recovery applications." CT&F - Ciencia, Tecnología y Futuro 11, no. 1 (June 30, 2021): 123–35. http://dx.doi.org/10.29047/01225383.367.

Повний текст джерела

Анотація:

Enhanced oil recovery (EOR) techniques are essential to improve oil production, and polymer flooding has become one of the promising technologies for the Brazilian Pre-Salt scenario. Biopolymers offer a range of advantages considering the Pre-Salt conditions compared to synthetic polymers, such as resistance to high salinity, high temperature, and mechanical degradation. In that sense, bulk rheology is the first step in a workflow for performance analysis. This paper presents a rheological analysis of four biopolymers (Schizophyllan, Scleroglucan, Guar Gum, and Xanthan Gum) in concentrations from 10 to 2,300 ppm, generally suitable for EOR applications, in temperature levels of 25, 40, 50, 60 and 70°C and two brines of 30,100 ppm and 69,100 ppm total dissolved solids, which aim to model seawater and the mixture between injected seawater and reservoir water typical in Pre-Salt conditions. The pseudoplastic behavior, the overlap concentration, and the activation energy were determined for each polymer solution. The structural differences in the polymers resulted in different rheological behaviors. Schizophyllan is the most promising, as its viscosifying power is higher than synthetic polymers comparable to Xanthan Gum. Its resistance at high temperatures is higher than that of synthetic polymers. Scleroglucan behaved similarly to Xanthan Gum, with the added advantage of being nonionic. Guar Gum had the lowest viscosities, highest overlap concentrations, and most pronounced viscosity decay among the tested polymers. To the author’s knowledge, rheological studies of the biopolymers presented here, considering the viscosities and the overlap concentration and activation energy, in the Pre-salt conditions, are not available in the literature and this will benefit future works that depend on this information

Стилі APA, Harvard, Vancouver, ISO та ін.

4

Torres, M. D., B. Hallmark, and D. I. Wilson. "Effect of concentration on shear and extensional rheology of guar gum solutions." Food Hydrocolloids 40 (October 2014): 85–95. http://dx.doi.org/10.1016/j.foodhyd.2014.02.011.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

5

Gastone, Francesca, Tiziana Tosco, and Rajandrea Sethi. "Guar gum solutions for improved delivery of iron particles in porous media (Part 1): Porous medium rheology and guar gum-induced clogging." Journal of Contaminant Hydrology 166 (October 2014): 23–33. http://dx.doi.org/10.1016/j.jconhyd.2014.06.013.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

6

Amundarain, J. L., L. J. Castro, M. R. Rojas, S. Siquier, N. Ramírez, A. J. Müller, and A. E. Sáez. "Solutions of xanthan gum/guar gum mixtures: shear rheology, porous media flow, and solids transport in annular flow." Rheologica Acta 48, no. 5 (December 9, 2008): 491–98. http://dx.doi.org/10.1007/s00397-008-0337-5.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

7

Martín-Alfonso, J. E., A. A. Cuadri, M. Berta, and M. Stading. "Relation between concentration and shear-extensional rheology properties of xanthan and guar gum solutions." Carbohydrate Polymers 181 (February 2018): 63–70. http://dx.doi.org/10.1016/j.carbpol.2017.10.057.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

8

Torres, M. D., F. Gadala-Maria, and D. I. Wilson. "Comparison of the rheology of bubbly liquids prepared by whisking air into a viscous liquid (honey) and a shear-thinning liquid (guar gum solutions)." Journal of Food Engineering 118, no. 2 (September 2013): 213–28. http://dx.doi.org/10.1016/j.jfoodeng.2013.04.002.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

9

Lapasin, Romano, Sabrina Pricl, and Paolo Tracanelli. "Rheology of hydroxyethyl guar gum derivatives." Carbohydrate Polymers 14, no. 4 (January 1991): 411–27. http://dx.doi.org/10.1016/0144-8617(91)90006-x.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

10

Sciarini, Lorena S., Pablo M. Palavecino, Pablo D. Ribotta, and Gabriela N. Barrera. "Gleditsia triacanthos Galactomannans in Gluten-Free Formulation: Batter Rheology and Bread Quality." Foods 12, no. 4 (February 9, 2023): 756. http://dx.doi.org/10.3390/foods12040756.

Повний текст джерела

Анотація:

Gluten-free batters, in general, require the incorporation of agents to control their rheology; this role is commonly played by hydrocolloids. New natural sources of hydrocolloids are under permanent research. In this regard, the functional properties of the galactomannan extracted from the seed of Gleditsia triacanthos (Gledi) have been studied. In this work, we evaluated the incorporation of this hydrocolloid, alone and in combination with Xanthan gum, in gluten-free batters and bread and compared it with Guar gum. The incorporation of hydrocolloids increased the viscoelastic profile of the batters. Gledi addition at 0.5% and 1.25% increased the elastic modulus (G′) by 200% and 1500%, respectively, and similar trends were observed when Gledi-Xanthan was used. These increases were more pronounced when Guar and Guar-Xanthan were used. The batters became firmer and more elastically resistant because of the addition of hydrocolloids; batters containing Gledi had lower values of these parameters than batters containing Gledi-Xanthan. The addition of Gledi at both doses significantly increased the volume of the bread compared to the control by about 12%, while when Xanthan gum was included, a decrease was observed, especially at higher doses (by about 12%). The increase in specific volume was accompanied by a decrease in initial crumb firmness and chewiness, and during storage, they were significantly reduced. Bread prepared with Guar gum and Guar-Xanthan gum combinations was also evaluated, and the trends observed were comparable to that of bread with Gledi gum and Gledi-Xanthan gum. The results showed that Gledi addition favors the production of bread of high technological quality.

Стилі APA, Harvard, Vancouver, ISO та ін.

11

Patel, S. P., G. Ranjan, and V. S. Patel. "Rheological properties of guar gum and hydroxyethyl guar gum in aqueous solution." International Journal of Biological Macromolecules 9, no. 6 (December 1987): 314–20. http://dx.doi.org/10.1016/0141-8130(87)90001-8.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

12

Chen, Feng, Xu Guang Wang, and Ren Shu Yang. "Preparation of Low Molecular Weight Guar Gum for Fracturing by Enzymatic Degradation." Advanced Materials Research 971-973 (June 2014): 127–30. http://dx.doi.org/10.4028/www.scientific.net/amr.971-973.127.

Повний текст джерела

Анотація:

Guar gum was subjected to degradation in high concentration aqueous solution by enzymatic treating to obtain high concentration low molecular weight guar gum for fracturing. The study indicates that the high concentration guar gum aqueous solution can be degraded effectively by enzymatic treating. The enzymatic treating conditions were investigated and the optical enzymatic treating pH, temperature and enzyme add amount are respectively 6, 50°C and 0.1g/L, and various of low molecular weight guar gum with different molecular weight can be obtained by controlling the enzymatic treating time.

Стилі APA, Harvard, Vancouver, ISO та ін.

13

Gao, Jie, and Brian P. Grady. "Reaction Kinetics and Subsequent Rheology of Carboxymethyl Guar Gum Produced from Guar Splits." Industrial & Engineering Chemistry Research 57, no. 22 (May 9, 2018): 7345–54. http://dx.doi.org/10.1021/acs.iecr.8b00782.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

14

Mousavi, Seyyed Mohammad Reza, Ali Rafe, and Samira Yeganehzad. "Structure-rheology relationships of composite gels: Alginate and Basil seed gum/guar gum." Carbohydrate Polymers 232 (March 2020): 115809. http://dx.doi.org/10.1016/j.carbpol.2019.115809.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

15

Katoch, Anjula, and Anirban Roy Choudhury. "Understanding the rheology of novel guar-gellan gum composite hydrogels." Materials Letters 263 (March 2020): 127234. http://dx.doi.org/10.1016/j.matlet.2019.127234.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

16

Ryou, Jae-Eun, and Jongwon Jung. "Characteristics of Biopolymer Guar Gum Solution Injection for Eco-Friendly Ground Reinforcement." Journal of the Korean Society of Hazard Mitigation 22, no. 1 (February 28, 2022): 201–7. http://dx.doi.org/10.9798/kosham.2022.22.1.201.

Повний текст джерела

Анотація:

Recently, research on the use of biopolymers for environmentally friendly soil improvement has been actively conducted. Biopolymer soil treatment has various effects, such as the enhancement of soil strength, reduction of hydraulic conductivity, and enhancement of vegetation. In this study, the flow and injection characteristics of guar gum solutions were analyzed to develop biopolymer-based injection materials. Viscosity measurements and micromodel experiments were conducted to analyze the flow and injection properties. Viscosity measurements indicated that the guar gum solution showed a tendency of shear-thinning, in which the viscosity decreased as the shear rate increased. By applying the Power-law, the consistency index tended to increase as the concentration of aqueous guar gum solution increased. However, no clear trend was observed for the behavior index. As a result of the micromodel experiment, the pore saturation tended to increase as the volumetric flow rate and concentration of the guar gum solution increased. This is because of an increase in the injection pressure and apparent viscosity. When applied to an actual field, the required injection pressure varies depending on the ground conditions. Therefore, the results of this study will be used as fundamental data for determining the concentration of aqueous guar gum solution suitable for ground conditions.

Стилі APA, Harvard, Vancouver, ISO та ін.

17

Bourriot, Sophie, Catherine Garnier, and Jean-Louis Doublier. "Phase separation, rheology and microstructure of micellar casein–guar gum mixtures." Food Hydrocolloids 13, no. 1 (January 1999): 43–49. http://dx.doi.org/10.1016/s0268-005x(98)00068-x.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

18

Chen, Feng, Xu Guang Wang, and Ren Shu Yang. "Synthesis and Characterization of Hydrophobic Modification Guar Gum." Advanced Materials Research 952 (May 2014): 121–24. http://dx.doi.org/10.4028/www.scientific.net/amr.952.121.

Повний текст джерела

Анотація:

The HMG GG-C14 was prepared by pre-swelling guar gum hydrophobic modification in alcohol-aqueous solution, the optical reactive condition was determined by studying the respective influence of each condition on the performance of the resultant product, and the final product possessed an apparent viscosity of 19957mPa·s (the apparent viscosity of parent guar gum is 11764mPa·s) and a substituting degree of 0.93%. The Ft-IR spectra of GG and GG-C14 indicate the hydrophobic long chain alkyl was successfully grafted onto guar gum.

Стилі APA, Harvard, Vancouver, ISO та ін.

19

Panyoyai, Naksit. "A Physical and sensorial characteristics of avocado spread added with different types of food hydrocolloids." Indonesian Food Science & Technology Journal 1, no. 2 (July 31, 2018): 52–56. http://dx.doi.org/10.22437/ifstj.v1i2.6452.

Повний текст джерела

Анотація:

Avocado spread is an alternative condiment for a healthy consumption due to the abundance of unsaturated fatty acids in the avocado flesh. The avocado spread mixed with food hydrocolloids (guar gum, inulin, carboxymethyl cellulose) at 3% (w/w) was studied on rheology, texture, colour and sensory evaluation in comparison with no hydrocolloid addition. For the flow analysis, all spread formulations are the non-Newtonian shear thinning fluids. Addition of food hydrocolloids increased the viscosity, oscillation stability, and heat resistance. Inclusion guar gum with the fruit spread strongly affected the hardness and work of shear. The avocado spread added with inulin showed higher greenness than the other treatments. Among the spread samples containing 3% carboxymethyl cellulose secured the highest score for spreadability, colour, flavour, taste, and overall acceptability

Стилі APA, Harvard, Vancouver, ISO та ін.

20

Goycoolea, F. M., E. R. Morris, R. K. Richardson, and A. E. Bell. "Solution rheology of mesquite gum in comparison with gum arabic." Carbohydrate Polymers 27, no. 1 (January 1995): 37–45. http://dx.doi.org/10.1016/0144-8617(95)00031-2.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

21

Xiong, Yun, Xu Zhang, and Ming Zhu Liu. "Surface-Crosslinked Guar Gum-g-Sodium Polyacrylate Superabsorbents: Swelling Characteristics and Mechanics Performance." Applied Mechanics and Materials 729 (January 2015): 39–46. http://dx.doi.org/10.4028/www.scientific.net/amm.729.39.

Повний текст джерела

Анотація:

Guar gum grafted sodium polyacrylate have been prepared via aqueous solution graft polymerization. Furthermore, the polymers were then surface-crosslinked using trimethylolpropane triglycidyl ether (TMPTGE) to improve the properties of swollen hydrogel. Polymerization conditions were systematically optimized to achieve the optimum swelling capacity. FTIR and DSC spectra confirmed that sodium acrylate had been grafted onto guar gum chains. SEM observations showed morphology of the samples. The results confirmed that introducing guar gum into the superabsorbent could improve the swollen hydrogel mechanics performance, including hydrogel strength, resilience and dispersion, although making the water absorbency decreasing slightly. The good mechanics performance will make it feasible in hygiene application.

Стилі APA, Harvard, Vancouver, ISO та ін.

22

Ali Razavi, Seyed Mohammad, Ali Alghooneh, Fataneh Behrouzian, and Steve W. Cui. "Investigation of the interaction between sage seed gum and guar gum: Steady and dynamic shear rheology." Food Hydrocolloids 60 (October 2016): 67–76. http://dx.doi.org/10.1016/j.foodhyd.2016.03.022.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

23

Kollár, Mariann, Gabriella Zsoldos, Tamás Szabó, and Kornél Szóda. "Examination of Biodegradable Polymer Thin Films." Materials Science Forum 885 (February 2017): 123–28. http://dx.doi.org/10.4028/www.scientific.net/msf.885.123.

Повний текст джерела

Анотація:

Fourier Transformed Infrared Spectroscopy (FTIR) was used to study the effect of water immersion of guar gum, gelatin and pektin films. Animal-derived gelatin, citrus-derived pektin and natural guar gum made from guar seeds was used to manufacture thin films (using a 2% concentration starting solution) by casting. The biodegradable polymer films were immersed in distilled water before FTIR analysis to absorb water. The immersion time varied between 1 to 15 sec for not to make hydrocolloids, only observe swelling. After 20 sec the biofilms effectively dissolved in the distilled water.

Стилі APA, Harvard, Vancouver, ISO та ін.

24

Pravin, Suruse, Godbole Mangesh, Bhamre Kumudini, and Shivhare Umesh. "Formulation and Evaluation of Colon Targeted Drug Delivery System." Indo Global Journal of Pharmaceutical Sciences 12 (2022): 115–21. http://dx.doi.org/10.35652/igjps.2022.12011.

Повний текст джерела

Анотація:

Purpose:The objective of the present study was to develop colon targeted drug delivery system of Metronidazole using guar gum as the carrier.Methods:Matrix tablets containing various proportions of guar gum were prepared by direct compression technique. Rapidly disintegrating Metronidazole core tablets were prepared and compression coated with guar gum and 20% of microcrystalline cellulose. The tablets were evaluated for hardness, thickness, drug uniformity and subjected to in vitro drug release studies under conditions mimicking mouth to colon transit. Results and Conclusions: The FTIR study indicates no possible interaction between Metronidazole and carriers. The tablets were found within the permissible limits for various physiological parameters. In vitro drug release studies in pH 6.8 phosphate buffer solution containing rat cecal contents have demonstrated the susceptibility of guar gum to the colonic bacterial enzyme action with consequent drug release. The pretreatment of rats orally with 1 ml of 2% w/v aqueous dispersion of guar gum for 7 d induced enzyme specifically acting on guar gum thereby increasing drug release. Dissolution studies were performed in 0.1N HCl for 2 h, in pH 7.4 buffer for 3 h and pH 6.8 up to 24 h. The cumulative percentage of drug release of Metronidazole after 24 h in pH 6.8 phosphatebuffers was found to be 98.51±0.02, 86.69±0.02, 84.55±0.04, 39.31±0.02, 24.60±0.02, 18.85±0.02 for formulation F1, F2, F3, F4, F5 and F6. It can be concluded that formulation F1 is considered a potential formulation for targeting the drug to the colon. The results showed that guar gum protects the drug from being release completely in the physiological environment of stomach and small intestine.©2022iGlobal Research and PublishingFoundation. All rights reserved.

Стилі APA, Harvard, Vancouver, ISO та ін.

25

Liu, Yi, Jing Liu, Yunzi Li, Hui Yang, Fei Yan, Jiapeng Zheng, Jun Wu, et al. "Development and Field Application of a New Ultralow Guar Gum Concentration Weighted Fracturing Fluid in HPHT Reservoirs." Journal of Chemistry 2020 (November 11, 2020): 1–10. http://dx.doi.org/10.1155/2020/7846372.

Повний текст джерела

Анотація:

A weighted fracturing fluid with superlow guar gum concentration was developed by synthesizing a polyboric acid cross-linker. The density of this fluid is 1.365 g/cm3 and can withstand very high temperature up to 175°C. In this study, a weighting agent was selected, and crosslinking ligands and boric acid were optimized. The crosslinking performance, base fluid viscosity, rheology, and gel-breaking performance of this fracturing fluid were studied. Compared with the conventional weighted fracturing fluid, the concentration of guar gum in the new weighted fracturing fluid can be reduced by 30% at the same temperature condition; moreover, crosslinking can be delayed by 2 minutes. The concentration of gel breaker used in this fluid can be significantly reduced to 0.005%∼0.01%. Two field tests were conducted in Jidong oil field, and both of them achieved great success.

Стилі APA, Harvard, Vancouver, ISO та ін.

26

Prajapat, Amrutlal L., Preeti B. Subhedar, and Parag R. Gogate. "Ultrasound assisted enzymatic depolymerization of aqueous guar gum solution." Ultrasonics Sonochemistry 29 (March 2016): 84–92. http://dx.doi.org/10.1016/j.ultsonch.2015.09.009.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

27

Lee, Donghyeon, Gyeongeon Min, Wooseok Roh, and Byoungseung Yoo. "Effect of Various Types of Sugar Binder on the Physical Properties of Gum Powders Prepared via Fluidized-Bed Agglomeration." Foods 10, no. 6 (June 16, 2021): 1387. http://dx.doi.org/10.3390/foods10061387.

Повний текст джерела

Анотація:

Particle agglomeration of fine gum powders to improve their physical and morphological characteristics is of crucial importance. Changes in the physical properties of guar gum, locust bean gum, and carboxymethyl cellulose powders subjected to fluidized-bed agglomeration with various sugar types as the binder were examined. The agglomerates with sugar binders had much larger particles (D50) and higher porosity (ε) than the corresponding fine gum powders, as confirmed by particle-size-distribution analysis and scanning electron microscopy. In particular, the carboxymethyl cellulose agglomerate exhibited much higher D50 and ε values than the original fine gum powder, with sorbitol as the binder resulting in the highest D50 and ε values. Except for guar gum with sorbitol as the binder, the guar gum and locust bean gum agglomerates with the other sugar binders showed lower Carr index and Hausner ratio values (thus exhibiting better flowability and lower cohesiveness) than the original powders, whereas those of the carboxymethyl cellulose agglomerates were higher. These findings indicate that the physical and structural properties of gum powders can be greatly improved according to the type of gum and sugar solution used in the agglomeration process.

Стилі APA, Harvard, Vancouver, ISO та ін.

28

Sharma, Kumkum, Rajat Pawar, Sunita Patidar, and P. K. Dubey. "Formulation and Evaluation of Organo-Transdermal Gel of Drug Ibuprofen." International Journal of Pharmaceutical Sciences and Medicine 7, no. 11 (November 30, 2022): 76–89. http://dx.doi.org/10.47760/ijpsm.2022.v07i11.006.

Повний текст джерела

Анотація:

The current research project is centered on the development and assessment of an Ibuprofen topical gel made with Guar gum as the polymer and Carbopol 940 as a penetration enhancer. [ Gels were made by dispersing the polymers in a solution of guar gum and isopropyl myristate, along with Carbopol 940, glycerol as aqueous agents, and potassium sorbate as preservative, and different concentrations of ibuprofen, all while maintaining magnetic stirring. Triethanolamine was then added to the dispersion to neutralize it and make it viscous. Ibuprofen - Guar gum gels were discovered to be homogeneous and to have adequate drug loading. All of the gel compositions' pH values fell within the range of neutral pH, which is suitable for skin. And it was discovered that the compositions' viscosity was suitable for topical use the drug content of the nine formulations was found in the range of 80% to 90% which shows efficient drug loading. The compatibility study showed that the major peaks in FTIR spectra of the pure drug were found to be intact in their physical mixture. Hence there is no interaction between the drug and Carbopol, drug and Guar Gum in their physical mixture. Guar gum can be effectively used as a polymer with Carbopol 940.

Стилі APA, Harvard, Vancouver, ISO та ін.

29

Jafry, Huma R., Matteo Pasquali, and Andrew R. Barron. "Effect of Functionalized Nanomaterials on the Rheology of Borate Cross-Linked Guar Gum." Industrial & Engineering Chemistry Research 50, no. 6 (March 16, 2011): 3259–64. http://dx.doi.org/10.1021/ie101836z.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

30

Alkarib, Suad Y., and Deina E. MohamedElhassan. "Evaluation of Acacia- Guar Gum Combination as Delayed Release Coating Former on Solid Placebo Tablets." Journal of Advanced Pharmaceutical Science And Technology 2, no. 4 (February 12, 2021): 1–10. http://dx.doi.org/10.14302/issn.2328-0182.japst-21-3700.

Повний текст джерела

Анотація:

Objectives The present study addresses evaluation of acacia-guar gum combination as an enteric former for tablet coating aiming to add knowledge on how develop the ability of enteric forming ability of acacia-guar combination. Methods Five formulations of enteric coating solution incorporating guar gum as delayed release polymers along with film coating material acacia gum followed by CMC and glycerin as plasticizer and coloring agents were prepared to coat placebo tablet cores. Different enteric coating formulations organized in different acacia : guar gum ratios as 1:1, 1:2, 1:3, 1:4 and 1:6 were sprayed on placebo tablets surface resulted different delayed coated tablets (F1,F2,F3,F4 &F5) respectively. General appearance and physical parameters were evaluated of each. Enteric coated tablets that revealed promising properties were subjected to accelerated stability study for 3 months to explore the influences of physical aging on tablet coat properties. Results Physical parameters of enteric coated tablets post coating within the range of pharmacopeia specification. The disintegration test was carried out in pH 1.2 and pH 6.8 at 37ºC. F1, F2 and F3 enteric tablets disintegrated immediately with no acid resistance compared F4 and F5 enteric tablets showed good acid resistance coat with smooth tablet surfaces and no coat defects. F5 formula contain acacia: guar gum as 1:6 ratio showed delayed release for 30min in pH 1.2 and 15min in phosphate buffer. The study statistically analyzed and concluded that, an efficient and stable acacia-guar enteric coat is achievable with no effect on tablets physical parameters. Guar gum at 60% as a delayed tablet coating material capable of protecting the tablets core from being released in acidic media and be release in the alkaline buffer as well as stable coat under accelerated storage for three months.

Стилі APA, Harvard, Vancouver, ISO та ін.

31

Musa, Tagwa A., Ahmed F. Ibrahim, Hisham A. Nasr-El-Din, and Anas M. Hassan. "New insights into guar gum as environmentally friendly polymer for enhanced oil recovery in high-salinity and high-temperature sandstone reservoirs." Journal of Petroleum Exploration and Production Technology 11, no. 4 (February 1, 2021): 1905–13. http://dx.doi.org/10.1007/s13202-020-01080-3.

Повний текст джерела

Анотація:

AbstractChemical enhanced oil recovery (EOR) processes are usually used as additives for hydrocarbon production due to its simplicity and relatively reasonable additional production costs. Polymer flooding uses polymer solutions to increase oil recovery by decreasing the water/oil mobility ratio by increasing the viscosity of the displacing water. The commonly used synthetic water-soluble polymer in EOR application is partially hydrolyzed polyacrylamide (HPAM). However, synthetic polymers in general are not attractive because of high cost, environmental concerns, limitation in high temperature, and high-salinity environment. Guar gum is an environmentally friendly natural water-soluble polymer available in large quantities in many countries and widely used in various applications in the oil and gas industry especially in drilling fluids and hydraulic fracturing operations; however, very limited studies investigated on guar as a polymer for EOR and no any study investigated on its uses in high-temperature and high -salinity reservoirs. The objective of this study is to confirm the use of guar gum as a natural polymer for EOR applications in sandstone reservoirs and investigate its applicability for high-temperature and high-salinity reservoirs. The study experimentally investigated rheological characteristics of a natural polymer obtained from guar gum with consideration of high temperature (up to 210 °F) and high salinity (up to 20% NaCl) and tested the guar solution as EOR polymer. The results of this study show that the guar solution can be used as an environmentally friendly polymer to enhance oil recovery. Based on the results, it can be concluded that guar gum shows shear-thinning behavior and strongly susceptible to microbial degradation but also shows a very good properties stability in high temperature and salinity, where in low shear rate case, about 100 cp viscosity can be achieved at 210 °F for polymer prepared in deionized water. Guar polymer shows good viscosity in the presence of 20% NaCl where the viscosity is acceptable for temperature less than 190 °F. Also, the flooding experiment shows that the recovery factor can be increased by 16%.

Стилі APA, Harvard, Vancouver, ISO та ін.

32

Swamy, N. G. N., T. S. Dharmarajan, K. L. K. Paranjothi, and Z. Abbas. "A REVIEW ON DERIVATIZATION OF GUAR AND STUDY OF PHARMACEUTICAL APPLICATIONS OF GUAR DERIVATIVES." INDIAN DRUGS 51, no. 01 (January 28, 2014): 5–17. http://dx.doi.org/10.53879/id.51.01.p0005.

Повний текст джерела

Анотація:

Guar gum is a naturally occurring alternating co-polymer derived from the seeds of Cyamopsis tetragonoloba. Guar has high intrinsic viscosity but very poor interaction coefficient. Guar dispersions lose viscosity upon standing. Guar has been derivatized to hydroxyalkyl, alkali carboxyalkyl and quaternary ammonium guar. Derivatization of guar enhances solution stability, clarity of dispersion and resistance to microbial attack. Derivatives of guar have immense pharmaceutical and cosmetic applications. The present review focuses on the various methodologies available for effecting derivatization of guar and also covers the specific application case studies in pharmaceutical and cosmeceutical fields. The authors opine that guar derivatives such as hydroxypropyl guar, sodium carboxymethyl guar and cationic guar are the prominent ones and shall be accorded an official status.

Стилі APA, Harvard, Vancouver, ISO та ін.

33

Picout, David R., Simon B. Ross-Murphy, Neil Errington, and Stephen E. Harding. "Pressure Cell Assisted Solution Characterization of Polysaccharides. 1. Guar Gum." Biomacromolecules 2, no. 4 (December 2001): 1301–9. http://dx.doi.org/10.1021/bm010118n.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

34

Atieno, Loreto, Willis Owino, Elijah M. Ateka, and Jane Ambuko. "Influence of Coating Application Methods on the Postharvest Quality of Cassava." International Journal of Food Science 2019 (February 4, 2019): 1–16. http://dx.doi.org/10.1155/2019/2148914.

Повний текст джерела

Анотація:

Various modes of edible coating application vary in their coat dispersion and film formation, hence the need to determine the most effective mode of application for cassava. Edible surface coatings have been found to be effective in preserving the quality of various food products. However, there are variations in effectiveness among the different coating solutions, hence the need for optimization of the concentrations of the gums used. This study aimed at determining the most efficient coating application method on the cassava postharvest quality. Physiologically mature cassava (variety KME 1) was harvested and divided into seven portions. The various portions were coated using 1.5% xanthan gum, 1.5% xanthan/guar gum, and 2% xanthan/guar gum by both dipping and spraying method. There was no significant difference on the colour, total cyanide, ethylene production, and total phenolic content between the two application methods. The 2% xanthan/guar gum coating showed a significant difference on the dry matter content while the 1.5% xanthan gum coating had a significant difference on the respiration rate and weight loss. The 1.5 xanthan treated roots had a final dry matter content of 72.5% for the sprayed samples and 75.98% for the dipped sample while the 2% xanthan/guar gum treated roots had a final dry matter content of 64.6% and 74.1% for the dipped and sprayed root samples, respectively. The 1.5% xanthan and 2% xanthan/guar gum treated roots showed no significant difference in their action on dry matter content. The 1.5% xanthan/guar dipped and sprayed samples differed significantly on their effect on flesh firmness with final values of 35.4N and 46.1N, respectively, at 20 days after harvest. This study suggested that based on the coating solution and the parameters being observed, there generally was no varying effect of dipping and spraying methods of coating application. The choice of the efficient mode of application to use will depend on other factors such as the easiness of application.

Стилі APA, Harvard, Vancouver, ISO та ін.

35

Cahalan, Mark, David Moskal, Cimon Song, and Jianhan Wu. "Optimization of reverse osmosis flowback water treatment using halotolerant microbes naturally enriched in fractured shales." University of Ottawa Science Undergraduate Research Journal 1 (August 23, 2018): 60. http://dx.doi.org/10.18192/osurj.v1i1.3720.

Повний текст джерела

Анотація:

Flowback water recovered after hydraulic fracturing operations poses a serious environmental concern due to the sheer quantity produced and its toxic chemical composition. Traditional methods of wastewater treatment cannot be used for flowback water treatment due to its high concentration of non-biodegradable dissolved solids. Consequently, alternative technology has been developed to address this problem. Reverse osmosis (RO) treatment is one such example. However, guar gum gelling agents found in flowback water impede membrane permeability and water flux rate of RO, consequently decreasing the efficiency and practicality of this desirable, environment-friendly technology. Previously, a biological solution using activated sludge to degrade guar gum prior to RO treatment was attempted with limited success due to the inhibitory effects of hypersalinity (characterized by high total dissolved solids content) on microbial activity. To solve this problem, several recently discovered strains of bacteria and archaea found to be naturally enriched in fractured shales may be utilized through genetic modification to degrade guar gum under hypersaline conditions. These microbes are naturally halotolerant and thrive under hypersaline conditions, making them prime targets for genetic modification targeting various chemical additives in flowback water. Here, we provide a proof of concept model using these microbes to selectively target guar gum degradation to improve the efficiency of RO treatment.

Стилі APA, Harvard, Vancouver, ISO та ін.

36

Sui, Chun Xia, Guo Ping Yu, Lian Zhou Jiang, Yi Hong Bao, De Jun Mei, Shu Wang, and Zhi Hui Zhang. "Research on Soluble Protein Surface Hydrophobicity of Biomaterial Solution from Soy Protein Isolate - Polysaccharide System." Advanced Materials Research 183-185 (January 2011): 1094–99. http://dx.doi.org/10.4028/www.scientific.net/amr.183-185.1094.

Повний текст джерела

Анотація:

The work attempts to study the surface hydrophobicity (S0) of soy protein isolate（SPI）-guar gum(GG) systems for biomaterial. Effect of four factors on the S0 values of the mixtures were studied. A response surface analysis was carried out using the Box-Behnken Design (BBD)method in order to determine the effects and interactions of pH (6.0, 8.0, 10.0), salt(0.05, 0.15, 0.25M), guar gum(0.10, 0.30, 0.50% w/v) and SPI concentrations (3, 4, 5% w/v) on the S0 values of mixtures. The datas were fitted into second order quadratic model. Salt concentration, pH and SPI concentration, interactions between pH and salt concentration, pH and GG concentration, pH and SPI concentration, GG and SPI concentrations were significant(P<0.05).

Стилі APA, Harvard, Vancouver, ISO та ін.

37

Wang, Jin, Bingbing Bai, Yan Wei, Qingchen Wang, Qiang Deng, Tingting Kong, Chengtun Qu, and Ying Tang. "Catalytic Oxidation of Polymers Remained in Oilfield by Transition Metal-Ethylenediamine Complex." Journal of Biobased Materials and Bioenergy 16, no. 5 (October 1, 2022): 765–69. http://dx.doi.org/10.1166/jbmb.2022.2233.

Повний текст джерела

Анотація:

This work is intended to seek for an efficient Fe-based Fenton reagent for clean oxidation of waste fracturing fluid containing hydroxypropyl guar gum (HGG) and other polymers in wide pH range. A series of complex was prepared with transition metal and ethylenediamine (L) by the coordination. The catalytic performance of the complexes were evaluated in the degradation of HGG, and the reaction conditions were optimized. The kinetics of HGG degradation was evaluated by means of the chemical oxygen demand (COD) and the viscosity. The results show that Fe(II)L exhibits high catalytic performance for the degradation of hydroxypropyl guar gum in a wide pH range of 7.0–11.0, the COD removal can reach to 86.4%. Under the optimum experimental conditions, the relative viscosity of hydroxypropyl guar gum solution can be reduced effectively to 7.99 from 247 with 10.0% H2O2 in presence of 5.0% Fe(II)L. Besides, under the optimized condition, three typical polymers used in oilfield can be degradated effectively.

Стилі APA, Harvard, Vancouver, ISO та ін.

38

J. Meena, S. K. Verma, R. Rameshwari, and D. K. Verma. "POLYANILINE/CARBOXYMETHYL GUAR GUM NANOCOMPOSITES: AS BIODEGRADABLE, CONDUCTIVE FILM." RASAYAN Journal of Chemistry 15, no. 02 (2022): 1021–27. http://dx.doi.org/10.31788/rjc.2022.1526820.

Повний текст джерела

Анотація:

Biomaterial-based nanocomposites have been increased in demand in industries for a purpose of packaging and sensing because of their low cost and environmentally friendly nature. But less work has been done on conductive, biodegradable film preparations. This article is devoted to the preparation of Polyaniline/ Carboxymethyl guar gum nanocomposites film and their applications. Controlled synthesis of polyaniline in the presence of carboxymethyl guar gum solution has been carried out for the synthesis of these nanocomposites. Then nanocomposite films have been obtained by solution casting method in one step. The object of this research work was to prepare a conductive, biodegradable, flexible film. Such made nanocomposites film has been further tested for FTIR, SEM, UTM, Conductivity, Swelling behavior and biodegradability. The results have been concluded that by this method a fine flexible, conductive, biodegradable film may be prepared that can be applied in different fields for further study.

Стилі APA, Harvard, Vancouver, ISO та ін.

39

Ma, Guoyan, Le Wang, Chao Hao, Chunbao Du, and Hongfei Ma. "Thermal and Rheological Performances Evaluation of a Modified Biopolymer for Fracturing Fluid System." Molecules 27, no. 22 (November 11, 2022): 7776. http://dx.doi.org/10.3390/molecules27227776.

Повний текст джерела

Анотація:

Developing an efficient fracturing fluid system is an enduring hot topic in the petrochemical industries, especially regarding the exploitation of limited oil. Biopolymers, especially polysaccharides (e.g., konjac gum, guar gum), are widely applied as fracturing fluids in fracturing as a result of their advantages. Herein, we propose an easy method of modifying konjac gum (KGM) using isopropanol, sodium hydroxide, and chloroacetic acid to obtain modified konjac glum (MKGM). The MKGM and KGM gels were also obtained by using the self-prepared organic titanium high-temperature stabilizer and organic borate cross-linker. The prepared MKGM was characterized by multiscale techniques, including attenuated total reflection Fourier transform infrared (ATR-FTIR), X-ray diffraction (XRD), thermal gravimetric analysis (TGA), differential scanning calorimetry (DSC), and rheology properties. The ATR-FTIR results showed that the etherification modification reaction occurred as designed. The XRD results showed that the regularity of KGM was destroyed after modification. The TGA and DSC results showed that the thermal stability improved. Rheology measurements illustrated that the temperature and shear resistance of MKGM were better than those of KGM. The MKGM gel could be applied in fracturing fluid systems at a lower frequency through viscoelastic measurements.

Стилі APA, Harvard, Vancouver, ISO та ін.

40

Sugita, Purwantiningsih, Bambang Srijanto, Budi Arifin, and Ellin Vina Setyowati. "STABILITY OF KETOPROFEN COATED BY CHITOSAN-GUAR GUM GEL." Indonesian Journal of Chemistry 9, no. 3 (June 24, 2010): 391–97. http://dx.doi.org/10.22146/ijc.21504.

Повний текст джерела

Анотація:

The coating stability of ketoprofen by chitosan-guar gum gel has been studied. Into 228.6 mL of 1.75% (w/v) chitosan solution in 1% (v/v) acetic acid, 38.1 mL of guar gum (gg) solution was added with concentration variation of 0.35, 0.55, and 0.75% (w/v) for ketoprofen microcapsules, and stirred with magnetic stirrer until homogenous. Afterwards, 7.62 mL of glutaraldehyde (glu) was added slowly under stirring, with concentrations varied: 3, 3.5, and 4% (v/v). All mixtures were shaked for 20 min for homogenization. Into each microcapsule mixture for ketoprofen, a solution of 2 g of ketoprofen in 250 mL of 96% ethanol was added. Every mixture was then added with 5 mL of 2% Tween-80 and stirred with magnetic stirrer for an hour at room temperature. Conversion of suspension into fine powders/granules (microcapsules) was done by using spray dryer. Every microcapsule formula was packed into capsules, as much as 100 g per capsule. The capsules were contained in 100-mL dark bottles and the bottles were kept in climatic chamber at (40 ± 2) °C and RH (75 ± 5) % for 3 months. The microcapsule stabilities were tested chemically and physically. The result showed that formulation of ketoprofen preparation composed of 1.75% (w/v) chitosan, 0.35% (w/v) gg, and 3.50% (v/v) glu, was relatively the best, with ketoprofen percentage left in microcapsule after 3 months, degradation rate constant, and shelf life of 80.33%, 0.0351 % week-1, and 18.92 months, respectively. Reaction kinetic model for this formula followed Prout-Tompkins equation and the degradation of ketoprofen was seem to follow autocatalytic reaction mechanism controlled by the formation and growth of reaction core. Keywords: Ketoprofen, chitosan-guar gum gel

Стилі APA, Harvard, Vancouver, ISO та ін.

41

Chen, Feng, Xu Guang Wang, Ren Shu Yang, Man Lin Yu, and Qiang Wang. "Synthesis and Property Analysis of Hydrophobic Modification Guar Gum." Advanced Materials Research 1046 (October 2014): 22–25. http://dx.doi.org/10.4028/www.scientific.net/amr.1046.22.

Повний текст джерела

Анотація:

The experiments were conducted to study the property of HMG GG-C14 which was prepared by pre-swelling guar gum hydrophobic modification in alcohol-aqueous solution, and the experiments results show the better viscosifying property of this hydrophobic modification product, and indicate that the novel hydrophobic modification method has better modification effect.

Стилі APA, Harvard, Vancouver, ISO та ін.

42

Cheng, Shaoling, Yapei Zhang, Ruitao Cha, Jinliang Yang, and Xingyu Jiang. "Water-soluble nanocrystalline cellulose films with highly transparent and oxygen barrier properties." Nanoscale 8, no. 2 (2016): 973–78. http://dx.doi.org/10.1039/c5nr07647a.

Повний текст джерела

Анотація:

By mixing a guar gum (GG) solution with a nanocrystalline cellulose (NCC) dispersion using a novel circular casting technology, we manufactured biodegradable films as packaging materials with improved optical and mechanical properties.

Стилі APA, Harvard, Vancouver, ISO та ін.

43

Haładyn, Kamil, Karolina Tkacz, Aneta Wojdyło та Paulina Nowicka. "The Types of Polysaccharide Coatings and Their Mixtures as a Factor Affecting the Stability of Bioactive Compounds and Health-Promoting Properties Expressed as the Ability to Inhibit the α-Amylase and α-Glucosidase of Chokeberry Extracts in the Microencapsulation Process". Foods 10, № 9 (25 серпня 2021): 1994. http://dx.doi.org/10.3390/foods10091994.

Повний текст джерела

Анотація:

This study aimed to evaluate the feasibility of microencapsulating chokeberry extract by extrusion, and assess the effects of the selected carrier substance on the contents of polyphenolic compounds, antioxidant activity, color of microspheres, and ability of microspheres to inhibit α-amylase and α-glucosidase, after 14 and 28 days of storage. The results showed that appropriate selection of the polysaccharide coating is of great importance for the proper course of the microencapsulation process, the polyphenolic content of chokeberry capsules, and their antioxidant and antidiabetic properties. The addition of guar gum to a sodium alginate solution significantly increased the stability of polyphenolic compounds in microspheres during storage, whereas the addition of chitosan had a significantly negative effect on the stability of polyphenols. The coating variant composed of sodium alginate and guar gum was also found to be the most favorable for the preservation of the antioxidant activity of the capsules. On the other hand, capsules composed of sodium alginate, guar gum, and chitosan showed the best antidiabetic properties, which is related to these tricomponent microspheres having the best α-glucosidase inhibition.

Стилі APA, Harvard, Vancouver, ISO та ін.

44

Vashist, Ghosal, Vashist, Kaushik, Gupta, Nair, and Ahmad. "Impact of Nanoclay on the pH-Responsiveness and Biodegradable Behavior of Biopolymer-Based Nanocomposite Hydrogels." Gels 5, no. 4 (October 16, 2019): 44. http://dx.doi.org/10.3390/gels5040044.

Повний текст джерела

Анотація:

This research work deployed free radical polymerization for the development of pH-responsive hybrid nanocomposite hydrogels (NCHs) with the formation of improved interpenetrating networks (IPN). The crosslinked biopolymeric system was composed of (chitosan (CH)/guar gum (GG)/polyol) and a nanofiller (Cloisite 30B). The study was aimed to investigate the role of Cloisite 30B as a nanofiller and linseed oil-derived polyol to induce stable interpenetrating networks in chitosan‒guar gum-based hydrogels. FT-IR analysis confirmed the formation of crosslinked networks with the formation of hydrogen bonds in the synthesized NCHs. Thermogravimetric analysis and differential scanning calorimetry revealed high thermal stability of the NCHs. The hydrolytic and soil burial degradation tests confirmed the biodegradability of the synthesized NCHs. An extraordinarily high swelling capacity in a buffer solution of pH 4.0 and 7.4 demonstrated their pH-responsive behavior. It has been demonstrated that even the minimal addition of polyol to the guar gum-based hydrogels has influenced the stability and characteristic features such as high swelling capacity owing to the formation of interpenetrating networks and the biodegradability of the hydrogels.

Стилі APA, Harvard, Vancouver, ISO та ін.

45

Shi, Jingjing, and Enlong Yang. "Post-electrospinning crosslinking of guar/polyvinyl alcohol membrane." Thermal Science 20, no. 1 (2016): 1–5. http://dx.doi.org/10.2298/tsci141225076s.

Повний текст джерела

Анотація:

College of Material and Textile Engineering, Jiaxing University, Jiaxing, China The present study reports post-electrospinning crosslinking of guar/polyvinyl alcohol (PVA)/citric acid nanofiber membranes by heat treatment. Porous, interconnected nonwoven nanofiber membranes (average diameter 194?23 nm) were electrospun from a homogeneous blend of 1wt% guar gum and 8wt% polyvinyl alcohol solution (3:7 weight ratio) containing 5 wt% (by the total weight of the solution) citric acid. The electrospun nanofiber membranes were then cured at 140 oC for 2 h. The crosslinked nanofiber membranes were insoluble in water, while the non-crosslinked membranes dissolved instantaneously. FT-IR spectrum investigates that crosslinking of guar/PVA occurred through esterfication reaction during heat treatment.

Стилі APA, Harvard, Vancouver, ISO та ін.

46

Singh, Vandana. "Cadmium (II) Removal From Aqueous Solution Using Guar Gum-Silica Nanocomposite." Advanced Materials Letters 6, no. 7 (July 1, 2015): 607–15. http://dx.doi.org/10.5185/amlett.2015.5873.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

47

Lashkari, Hannan, Asghar Khosrowshahi asl, Ashkan Madadlou, and Mohammad Alizadeh. "Chemical composition and rheology of low-fat Iranian white cheese incorporated with guar gum and gum arabic as fat replacers." Journal of Food Science and Technology 51, no. 10 (July 7, 2012): 2584–91. http://dx.doi.org/10.1007/s13197-012-0768-y.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

48

Wang, Shunwu, Ziwang Li, and Qinglong Yu. "Kinetic degradation of guar gum in oilfield wastewater by photo-Fenton process." Water Science and Technology 75, no. 1 (October 7, 2016): 11–19. http://dx.doi.org/10.2166/wst.2016.470.

Повний текст джерела

Анотація:

Guar gum is considered as a main component of oilfield wastewater. This work is intended to optimize the experimental conditions (H2O2 dosage, Fe2+ dosage, initial concentration of organics, initial pH and temperature) for the maximum oxidative degradation of guar gum by Fenton's reagent. The kinetics of guar gum removal were evaluated by means of the chemical oxygen demand (COD) and the absorbance measurements. The batch experiment results showed that the optimum conditions were: H2O2 dosage, 10,000 mg/L; Fe2+dosage, 2,000 mg/L; initial concentration of organics, 413 mg/L; pH, 3 and temperature, 35 °C, under which the COD removal could reach 61.07% and fairly good stability could be obtained. Under the optimum experimental conditions, using UV irradiation to treat the wastewater, the photo-Fenton systems can successfully eliminate COD from guar gum solution. The COD removal always obeyed a pseudo-first-order kinetics and the degradation rate (kapp) was increased by 25.7% in the photo-Fenton process compared to the Fenton process. The photo-Fenton system needed less time and consequently less quantity of H2O2 to obtain the same results as the Fenton process. The photo-Fenton process needs a dose of H2O2 20.46% lower than that used in the Fenton process to remove 79.54% of COD. The cost of the photo/Fenton process amounted to RMB9.43/m3, which was lower than that of the classic Fenton process alone (RMB10.58/m3) and the overall water quality of the final effluent could meet the class Ι national wastewater discharge standard for the petrochemical industry of China.

Стилі APA, Harvard, Vancouver, ISO та ін.

49

Wang, Lili, Xiancheng Wang, Yifeng Shen, Jianzhong Shao, and Fuyu Pei. "Synthesis and properties of s-triazine di-sulfanilic guar gum as a thickener in reactive printing." Textile Research Journal 88, no. 15 (May 15, 2017): 1766–75. http://dx.doi.org/10.1177/0040517517708541.

Повний текст джерела

Анотація:

S-triazine di-sulfanilic guar gum (TSG) was successfully prepared by monochlorotriazine di-sulfanilic (TS) and guar gum (GG) in order to improve the printing properties in reactive printing. The results showed that the optimized synthesis condition of TSG was at sodium carbonate solution 1.2 g/L at 90℃ for 75 min through the single-factor experiment. Compared to GG, TSG had better flowability, mainly viscous effects and higher viscosity recoverability, which was more appropriate as a thickener in reactive printing. In the cotton printing experiment, TSG had higher paste add-on, color yield, penetration and levelness than GG. Furthermore, the printing effects of TSG on cotton drew near to those of sodium alginate, which could obtain evenly colored large patterns and excellent outline sharpness.

Стилі APA, Harvard, Vancouver, ISO та ін.

50

Ren, Cheng Qiang, Xu Wang, Li Liu, and Lei Gao. "Design and Evaluation of Compound Chemical Scale Remover." Advanced Materials Research 236-238 (May 2011): 664–67. http://dx.doi.org/10.4028/www.scientific.net/amr.236-238.664.

Повний текст джерела

Анотація:

Scale deposition, including organic and inorganic substances, is always found in oil and gas field due to the changes of environmental factors in production. As a result, it is puzzled by the formation damage and wellbore plug. In fact, many wells face to complex scale, and even it is difficult to identify the type. In order to simplify treatment and promote efficiency, it is necessary to develop combining scale remover. A compound chemical scale remover is designed to relieve the complex scale comprised of calcium carbonate, guar gum and paraffin. Inorganic scale removing efficiency, paraffin removing rate and viscosity reduction ratio are used to determine the main agents respectively. Surfactants and lacquer solvent are added to develop an emulsion solution due to the incompatibility of water solution and organic solvent. This formula can dissolve 72.58% weight of calcium carbonate, reduce the viscosity of guar gum to 2.736mPa×s and remove the paraffin with a rate of 0.018 g/min.

Стилі APA, Harvard, Vancouver, ISO та ін.

Ми пропонуємо знижки на всі преміум-плани для авторів, чиї праці увійшли до тематичних добірок літератури. Зв'яжіться з нами, щоб отримати унікальний промокод!