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Journal articles on the topic 'Xanthangum'
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Ebrahiminezhad, Alireza, Marziyeh Zare, Sedigheh Kiyanpour, Aydin Berenjian, Seyyed Vahid Niknezhad, and Younes Ghasemi. "Biosynthesis of xanthangum‐coated INPs by using Xanthomonas campestris." IET Nanobiotechnology 12, no. 3 (2017): 254–58. http://dx.doi.org/10.1049/iet-nbt.2017.0199.
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Deshmukh, S. R., and R. P. Singh. "Drag reduction characteristics of graft copolymers of xanthangum and polyacrylamide." Journal of Applied Polymer Science 32, no. 8 (1986): 6163–76. http://dx.doi.org/10.1002/app.1986.070320803.
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Durgesh, R. Patil, B. Patil Chandani, N. Patil Amruta, and P. Pawar Dr.Sunil. "An Review of the Innovative Method used in Medicinal Gels." Journal of Advanced Research and Reviews in Virology & Microbiology 1, no. 2 (2024): 1–12. https://doi.org/10.5281/zenodo.11368052.
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<em>An overview of the innovative method used in medicinal gels describes gels and their groundbreaking creation as hydrogels. Gel is an intermediate state of matter made up of both solid and liquid constituents. The paper also includes a brief discussion on hydrogels, which are three-dimensional structures that have the ability to hold biological fluids and a significant amount of water without swelling. In-Situ gels are an innovative method in pharmaceutical gel. Hydrogels with a solution form that gel when in touch with bodily fluids or when their pH changes are known as in-situ gels. A number of polymers, including carbopol-934, HPMC, gellangum, xanthangum, carrageenan, xyloglucan, pectin, and chitosan, are utilized in in-situ gelling systems. The characterization, plan component, and utilizations of gel and hydrogels (In-Situ gel) as imaginative methodology frameworks in drugs are the primary subjects of this paper.</em>
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Mohammad, Abdul Saleem, Seema Farheen, and Nuha Rasheed. "Formulation and Evaluation of Trilayered Tablets of Zolmitriptan." International Journal of Pharmaceutical Sciences and Nanotechnology 9, no. 6 (2016): 3512–23. http://dx.doi.org/10.37285/ijpsn.2016.9.6.1.
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The present study outlines a systematic approach to formulate and evaluate trilayered tablets of zolmitriptan by geomatrix technology by using different concentrations of HPMC, xanthangum and ethyl cellulose by direct compression method for controlled release, which may produce the controlled drug release in the treatment of migraine disorder. The different release rates from these formulations were obtained from in vitro dissolution studies. From the results it was observed that the release rate was greatly influenced by the polymer concentration. In order to obtain a formulation which releases more than 90% of drug within 12-14hrs, sixteen formulation trials of the active layer have been prepared and the drug release follows first order kinetics. Hence, the formulation trial F14 showed about 99% drug release in 12 hrs, where the drug release was dependent on concentration of drug in tablets and showed various physiochemical evaluation parameters like hardness, thickness and also showed drug excipient compatibilities by DSC and FTIR studies.
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Toshimitsu, Masaki, Yukihiro Yonemoto, and Akimaro Kawahara. "Pressure Change for Single- and Two-Phase Non-Newtonian Flows through Sudden Contraction in Rectangular Microchannel." Fluids 6, no. 12 (2021): 440. http://dx.doi.org/10.3390/fluids6120440.
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The flow characteristics of the single-phase liquid and the gas–liquid two-phase flows including the Newtonian and non-Newtonian liquids were experimentally investigated in a horizontal rectangular micro-channel with a sudden contraction—specifically the pressure change across the contraction. The rectangular cross-sectional dimension has Wu × Hu (width × height) = 0.99 × 0.50 mm2 on the upstream side of the contraction and Wd × Hd = 0.49 × 0.50 mm2 on the downstream side. The resulting contraction ratio, σA (=Wd/Wu), was 0.5. Air was used as the test gas (in the case of the gas–liquid two-phase flow experiment), distilled water and three kinds of aqueous solution, i.e., glycerin 25 wt%, xanthangum 0.1 wt% and polyacrylamide 0.11 wt% were used as the test liquid. The pressure distribution in the flow direction upstream and downstream of the channel was measured. The pressure change and loss at the sudden contraction were determined from the pressure distribution. In addition, the pressure change data were compared with the calculation by several correlations proposed by various researchers as well as a newly developed correlation in this study. From the comparisons, it was found that calculations by the newly developed correlations agreed well with the measured values within the error of 30%.
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Qiang, Yan, Liejiang Wei, Xiaomei Luo, Hongchao Jian, Wenan Wang, and Fenfen Li. "Heat Transfer and Flow Structures of Laminar Confined Slot Impingement Jet with Power-Law Non-Newtonian Fluid." Entropy 20, no. 10 (2018): 800. http://dx.doi.org/10.3390/e20100800.
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Heat transfer performances and flow structures of laminar impinging slot jets with power-law non-Newtonian fluids and corresponding typical industrial fluids (Carboxyl Methyl Cellulose (CMC) solutions and Xanthangum (XG) solutions) have been studied in this work. Investigations are performed for Reynolds number Re less than 200, power-law index n ranging from 0.5 to 1.5 and consistency index K varying from 0.001 to 0.5 to explore heat transfer and flow structure of shear-thinning fluid and shear-thickening fluid. Results indicate that with the increase of n, K for a given Re, wall Nusselt number increases mainly attributing to the increase of inlet velocity U. For a given inlet velocity, wall Nusselt number decreases with the increase of n and K, which mainly attributes to the increase of apparent viscosity and the reduction of momentum diffusion. For the same Re, U and Pr, wall Nusselt number decreases with the increase of n. Among the study of industrial power-law shear-thinning fluid, CMC solution with 100 ppm shows the best heat transfer performance at a given velocity. Moreover, new correlation of Nusselt number about industrial fluid is proposed. In general, for the heat transfer of laminar confined impinging jet, it is best to use the working fluid with low viscosity.
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Vijayalakshmi, V., S. Sathish, and R. Umarani. "Effect of Xanthan gum seed coating on seed germination and seedling vigour of finger millet (Eleusine coracana L.)." Environment Conservation Journal 25, no. 1 (2024): 206–10. http://dx.doi.org/10.36953/ecj.24342669.
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Six Hydrophilic polymers Xanthan Gum, Iota Carrageenan, Kappa Carrageenan, Agar Agar, Food grade Agar and Gellan Gum were studied for polymerization potential and water holding capacities. Among the six polymers, Xanthan gum and Iota Carageenan recorded the maximum values for water holding capacities of 38.27 ml/g and 34.17 ml/g and were forwarded for the Seed coating experiment. Coating experiments consist of twodosages of polymer powders (10g, and 20g /kg) and two concentrations of sticking agent (water 5ml and 10 ml). Coated seeds exposed to seed germination studies against untreated seeds. Results revealed that Finger millet seeds coated with 20 g Xanthan gum + 10 ml water as sticker recorded the maximum values for seed germination (87%), seedling length (26.23cm), dry matter production (12.47mg 10 seedlings-1)and Vigour Index I (2282) and II (1084).The % increase over the control was 7 for seed germination, 56 for seedling length (cm), 21 for dry matter production (mg) ,69 for seedling vigour index I and 31for seedling vigour index II. From the studies it could be concluded that Finger millet seeds coated with the Xanthangum @20 g can be recommended as pre sowing seed treatment for improving the Seed Germination and seedling vigour.
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G., Mahesh *. "FORMULATION DEVELOPMENT AND EVALUATION OF MATRIX TABLETS OF PROPRANOLOL HCL BY USING RELEASE RETARDING AGENTS." Journal of Pharma Research 7, no. 3 (2018): 31–36. https://doi.org/10.5281/zenodo.1209341.
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<strong><em>ABSTRACT</em></strong> <strong><em>T</em></strong><em>he main aim of the present work is to formulate and develop matrix tablets of Propranolol HCl. Selected suitable method for preparation process of Direct compression method for matrix tablets of Propranolol HCl by using varying concentrations of HPMC K4M, HPMC K100M, sodium alginate and Xanthan gum as a release retarding agents, dibasic calcium phosphate, Microcrystalline cellulose as diluents, talc and magnesium stearate as glidant and lubricant. Excipients compatibility studies were carried out by Stability studies and FT-IR studies between API and selected excipients. All the matrix tablets of Propranolol HCl formulations were evaluated for Pre-compression and post-compression parameters. All the formulations were evaluated for the hardness, friability, thickness, weight variation, drug content uniformity, and in-vitro drug release studies. Based on in-vitro drug release the polymer Xanthan gum showed better dissolution control compared to the other polymers like HPMC K4M and HPMC K100M and sodium alginate. Release of Propranolol HCl from the tablets formulated by employing 25mg of Xanthan gum and 77 mg dibasic calcium phosphate showed that more drug release So, the formulation F- 10 was the optimized formula.</em> <strong><em>KEYWORDS</em></strong><em>: Propranolol HCl, HPMC, Sodium Alginate, Xanthangum, Dibasic Calcium Phosphate, Release Retarding agents, Diluents, Glidant, Release Kinetics.</em>
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V. Vijayalakshmi, S. Sathish, and K. Sivasubramaniam. "Hydrophilic polymer seed coating on drought Mitigation in Black Gram Var. VBN 8 (Vigna mungo L.)." Ecology, Environment and Conservation 29, no. 02 (2023): 676–80. http://dx.doi.org/10.53550/eec.2023.v29i02.020.
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An investigation was carried out to standardize the suitable hydrophilic polymer seed coating technique to withstand drought in rainfed Black gram cv. VBN 8. Seven organic hydrophilic polymers namely, Ethyl cellulose, Methyl Cellulose, Carboxyl Methyl Cellulose, Agar Agar, Xanthan Gum, Carrageenan and Gum Arabic were taken and their gel formation and water holding capacities were studied. Among all the polymers Xanthan Gum, Carrageenan, Agar Agar, Carboxy methyl cellulose and Gum Arabic showed higher potential in terms of gel formation and water holding capacity and were used for seed coating studies in three different concentrations (1, 2 and 3%) with two different dosages (20 ml and 40 ml /kg of seeds) and subjected to germination test under 60 % WHC of sand. Results revealed that seeds coated with 2 % carrageenan @ 40 ml /kg of seeds performed better in terms of all seed quality parameters under water stress which was on par with 2% Xanthangum@ 40 ml /kg coated seeds. Further the five identified polymers were tried in combinations. Each polymer were blended with other polymers in the ratio of 1:1 and 3:1 and studied for their stress avoidance potential under 60 % water holding capacity of sand. The results revealed that Blackgram seeds coated with 2 % Agar blended Carrageenan in the ratio of 3:1 @ 40 ml / kg performed better in terms of seed quality parameters and expressed promising effect in drought mitigation.
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Kazachenko, Aleksandr S., Natalya Yu Vasilieva, Valentina S. Borovkova, et al. "Food Xanthan Polysaccharide Sulfation Process with Sulfamic Acid." Foods 10, no. 11 (2021): 2571. http://dx.doi.org/10.3390/foods10112571.
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Xanthan is an important polysaccharide with many beneficial properties. Sulfated xanthan derivatives have anticoagulant and antithrombotic activity. This work proposes a new method for the synthesis of xanthan sulfates using sulfamic acid. Various N-substituted ureas have been investigated as process activators. It was found that urea has the greatest activating ability. BBD of xanthan sulfation process with sulfamic acid in 1,4-dioxane has been carried out. It was shown that the optimal conditions for the sulfation of xanthan (13.1 wt% sulfur content) are: the amount of sulfating complex per 1 g of xanthan is 3.5 mmol, temperature 90 °C, duration 2.3 h. Sulfated xanthan with the maximum sulfur content was analyzed by physicochemical methods. Thus, in the FTIR spectrum of xanthan sulfate, in comparison with the initial xanthanum, absorption bands appear at 1247 cm−1, which corresponds to the vibrations of the sulfate group. It was shown by GPC chromatography that the starting xanthan gum has a bimodal molecular weight distribution of particles, including a high molecular weight fraction with Mw > 1000 kDa and an LMW fraction with Mw < 600 kDa. It was found that the Mw of sulfated xanthan gum has a lower value (~612 kDa) in comparison with the original xanthan gum, and a narrower molecular weight distribution and is characterized by lower PD values. It was shown by thermal analysis that the main decomposition of xanthan sulfate, in contrast to the initial xanthan, occurs in two stages. The DTG curve has two pronounced peaks, with maxima at 226 and 286 °C.
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Maimunah, Siti, Paul J. A. Kessler, Sapto Indrioko, Muhammad Naiem, and J. H. Samek. "Study of the Genetic Diversity in an Effort to Protect the Genus Dacrydium Lamb. In Central Kalimantan, Indonesia." IOP Conference Series: Earth and Environmental Science 1447, no. 1 (2025): 012001. https://doi.org/10.1088/1755-1315/1447/1/012001.
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Abstract The tropical coniferous genus Dacrydium is widespread in Kalimantan, Indonesia. Four species can still be found in Borneo. Locally known as Alau, this genus thrives in a range of habitats from heath to deep-peat forests especially in Central Kalimantan. This genus is currently threatened by logging, fires and forest conversion forto other uses. The objectives of this study wereas to unravel the genetic diversity of Dacrydium in the study area which is a large unified diverse landscape. Our research was conducted in heath forests located within PT Taiyoung Engreen logging company area in the Gunung Mas District, and PT Dasa Intiga in the Kapuas District and in deep-peat swamp forest located in Sebangau National Park in the Palangkaraya District. The four species that are suspected to exist in Kalimantan, namely Dacrydium beccarii Parl., Dacrydium pectinatum de Laub., Dacrydium elatum (Roxb.)Wall. ex Hook. and Dacrydium xanthandrum Pilg. were met in various abundances. Genetic data were tested by isoenzyme analysis with 20 samples of each species of D. beccarii and D. pectinatum from each site. The results showed that D. beccarii and D. pectinatum have a large number of missing alleles, rare alleles, and individual alleles, which are found in different species in the three research sites, all show their own genetic peculiarities. That makes it necessary to develop a strategy to protect the genus Alau quite locally, especially D. pectinatum is of high concern as it is quite threatened. Genetic diversity values of D. beccarii and D. pectinatum have genetic diversity in population 0.478 and 0,447, interpopulation diversity 0.208 and 0,253, roportion of genetic diversity between populations to total genetic diversity 0.289 and 0,350 with fixation index values (-0.021) and 0,187 (≈0) it has a tendency to random mating. Itis necessary to implement a strategy for saving Dacrydium. This can be implemented from our research site. Actions will include the translocating of individual seedlings between research sites where each has a private allele with different advantages to be planted in all original habitat to increase genetic variation, and establish demonstration plots to safeguard genetic variation and diversity, and additionally carry out genetic enrichment planting, especially for D pectinatum.
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"Xanthan Gum as Sustainable Biopolymer Additive for Soil Treatment." International Journal of Recent Technology and Engineering 8, no. 4 (2019): 10487–92. http://dx.doi.org/10.35940/ijrte.d4234.118419.
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Ground improvement procedures give a solid common stage to development exercises and spare time for planning progressively safe structures which would not have been conceivable on powerless and extremely poor soils. Soil treatment in development building plans to improve the dirt properties, for example, total security, quality and disintegration opposition. Customary soil treatment materials have a few inadequacies, particularly from the natural perspective. In this way, there is a requirement for an appropriate eco-accommodating material to supplant the customary materials. In this examination, Xanthan gum is utilized as soil improvement material. Xanthan gum (XG) is a microbial exopolysaccharide created by the action of gramnegative bacterium Xanthitalics Campestris through maturing sucrose, glucose or other sources of sugar. This biopolymer is associated in the sustenance, restorative, pharmaceutical and petrochemical organizations and in various fragments as a thickener, stabilizer, or emulsifier and when united with various gums it can go about as gelling operator. At the point when added to soils, it frames cation connect between the particles, with fine particles it upgrades quality by means of hydrogen holding and goes about as a cementation folio between coarse particles. The fundamental precept of this study is to strengthen the soil by performing California bearing ratio test (CBR) and unconfinedcompression test (UCC) at varying percentages of Xanthangum.
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"Dacrydium xanthandrum." CABI Compendium CABI Compendium (January 7, 2022). http://dx.doi.org/10.1079/cabicompendium.17651.
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Vijayalakshmi, V., S. Sathish, K. Sivasubramaniam, et al. "Role of Hydrophilic Biopolymers Concoction Seed Coating on Seed Germination and Field Performance of Blackgram (Vigna mungo L.)." LEGUME RESEARCH - AN INTERNATIONAL JOURNAL, Of (December 27, 2023). http://dx.doi.org/10.18805/lr-5189.
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Background: Blackgrm is one of the most important pulse crops majorly cultivated in rainfed conditions of India. Soil moisture deficit,low and erratic rainfall, use of poor quality seeds,poor crop stand and improper crop managementresulting in lower productivity in rainfed ecosuystem . Reduced crop stand alone leads to 30% deficit in production combined.Availability of technology to overcome drought stress is one of the way to expand blackgram cultivation in dry tracks. Hydrophilic polymers may have great potential in restoration and reclamation, when used the polymers correctly and an ideal situations will have atleast 95 % of their stores water available for plant absorption. There are N number of inorganic polymers available in the market, that can be applied in the farm of soil application. Studies on Hydrophilic bio polymer seed coating to mitigate water stress is very megar or nil. Hence, the present study was formulated in blackgram as hydrophilic bio polymer seed coating on seed germination and field emergence. Method: Seed coating experiment consists of seven hydrophilic biopolymers (Ethyl cellulose, Methyl cellulose, Carboxyl methyl cellulose, Agar, Gum Arabic, Xanthangum and Carrageenan); two coating methods (dry and dry powder concoction). The germination test conducted in sand media with 60 % Water Holding Capacity of sand and PEG induced water stress and evaluated for seed quality parameters against uncoated seeds. Field experiments conducted with water stress periods of 10 days, 20 days and 25 days after life irrigation and observed for biometric and yield parameters. Results: Results revealed that blackgram seeds coated with bio polymer concoction of xanthan gum : carrageenan : agar agar (4:1:1) @ 20 g / kg performed better in terms of all seed quality parameters and withstand water stress upto 20 days after life irrigation with the yield increase of 53% over stressed control (skipping irrigation for 20 days after life irrigation) and can be recommended as a pre sowing treatment for drought mitigation in blackgram.
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Ronaldo, Andre, Harri Prayogo, and Muflihati. "IDENTIFIKASI JENIS POHON FAMILI PODOCARPACEAE PADA HUTAN PEGUNUNGAN ATAS DI GUNUNG BAWANG KABUPATEN BENGKAYANG KALIMANTAN BARAT." JURNAL HUTAN LESTARI 7, no. 1 (2019). http://dx.doi.org/10.26418/jhl.v7i1.31000.
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Mount Bawang is one of the protected forest areas in Bengkayang Regency, West Kalimantan with an altitude reaching 1.471 masl. Mount Bawang belongs to the type of tropical rain forest which is overgrown by various species of plants with high species diversity. The forest in Gunung Bawang has a zone of upper mountain forest vegetation which is a habitat for tree species from the family Podocarpaceae. Podocarpaceae family tree species can grow in humid forest conditions, dominating the upper mountain forests, mountainous scrublands, and some in the swamp and scorch forest. The purpose of this study was to identify and describe the morphology of tree species from the Podocarpaceae family on Mount Bawang. The method used in this study is an exploration method that is carried out by exploring the ridge at an altitude of 1.100-1.400 masl, then taking samples of the herbarium. Based on the results of the study found 5 species of trees from the family Podocarpaceae. These species are Dacrydium xanthandrum, Falcatifolium falciforme, Podocarpus borneensis, Podocarpus neriifolius, and Phylocladus hyphophyllus. The morphological characteristics of the Podocarpaceae family are generally needle-leafed, leafy mesophyll, thick, upright stems sometimes bent, and have seed-bearing organs in the form of conifers.Keyword: Bengkayang Regency, Mount Bawang, Podocarpaceae, Upper Mountain Forest.