Liquid crystallization of glassy guar gum with water

2004 ◽  
Vol 416 (1-2) ◽  
pp. 121-127 ◽  
Author(s):  
Tatsuko Hatakeyama ◽  
Sunao Naoi ◽  
Hyoe Hatakeyama
Keyword(s):  
Guar Gum ◽  
Liquid Crystallization

Increased dryness after pressing and wet web strength by utilizing foam application technology

TAPPI Journal ◽  
2016 ◽  
Vol 15 (11) ◽  
pp. 731-738 ◽  
Author(s):  
KARITA KINNUNEN-RAUDASKOSKI ◽  
KRISTIAN SALMINEN ◽  
JANI LEHMONEN ◽  
TUOMO HJELT
Keyword(s):  
Tensile Strength ◽  
Guar Gum ◽  
Paper Industry ◽  
Reference Sample ◽  
Strength Properties ◽  
Cellulose Microfibrils ◽  
Application Technology ◽  
Ethylene Vinyl Alcohol ◽  
Wet Pressing ◽  
Web Strength

Production cost savings by lowering basis weight has been a trend in papermaking. The strategy has been to decrease the amount of softwood kraft pulp and increase use of fillers and recycled fibers. These changes have a tendency to lower strength properties of both the wet and dry web. To compensate for the strength loss in the paper, a greater quantity of strength additives is often required, either dosed at the wet end or applied to the wet web by spray. In this pilot-scale study, it was shown how strength additives can be effectively applied with foam-based application technology. The technology can simultaneously increase dryness after wet pressing and enhance dry and wet web strength properties. Foam application of polyvinyl alcohol (PVA), ethylene vinyl alcohol (EVOH), carboxymethyl cellulose (CMC), guar gum, starch, and cellulose microfibrils (CMF) increased web dryness after wet pressing up to 5.2%-units compared to the reference sample. The enhanced dewatering with starch, guar gum, and CMF was detected with a bulk increase. Additionally, a significant increase in z-directional tensile strength of dry web and and in-plane tensile strength properties of wet web was obtained. Based on the results, foam application technology can be a very useful technology for several applications in the paper industry.

Formulation and Evaluation of Microbially- triggered tablets of Valdecoxib

2010 ◽  
Vol 2 (1) ◽  
Author(s):  
Surender Verma ◽  
S. Singh ◽  
D. Mishra ◽  
Atul Gupta ◽  
Rakesh Sharma
Keyword(s):  
Phosphate Buffer ◽  
Guar Gum ◽  
Oral Route ◽  
Matrix Tablets ◽  
In Vitro Dissolution ◽  
Wet Granulation ◽  
Dissolution Study ◽  
Caecal Content ◽  
Model Drug

The objective of present study was to develop colon targeted drug delivery using bacterially triggered approach through oral route. Valdecoxib (COX-2 inhibitor) was chosen as a model drug in order to target it to colon which may prove useful in inflammatory bowel disease and related disorders. Matrix tablets of Valdecoxib were prepared by wet granulation technique utilizing different ratio of Guar gum and Sodium starch glycholate. The prepared matrix tablets were evaluated for uniformity of weight, uniformity of content, hardness and in vitro dissolution study in simulated gastric and intestinal fluid (Phosphate Buffer pH-1.2, pH-6.8 and pH-7.4), followed by Dissolution study in bio-relevant dissolution media Phosphate Buffer (pH-6.8) containing rat caecal content. The results revealed that the formulated batch had released lesser quantity of drug at pH 1.2 and pH 7.4 in 2 hors whereas in biorelevent dissolution media containing rat caecal content it released significantly higher amount of drug which was also significantly higher than the dissolution media of same pH without caecal content (microflora) and it was concluded that guar gum can be used as a potential carrier for targeting drugs to colon.

pH Dependent Release Potential of Natural Polymers in Sustained Release of Ornidazole From Colon Targeted Delivery System)

2019 ◽  
Vol 9 (02) ◽  
Author(s):  
Sharma Pankaj ◽  
Tailang Mukul
Keyword(s):  
Drug Release ◽  
Delivery System ◽  
Targeted Delivery ◽  
Guar Gum ◽  
Acidic Environment ◽  
Natural Polymers ◽  
Weight Variation ◽  
Curve Determination ◽  
Preformulation Studies

The aim of present work was to prepare colon specific delivery system of Ornidazole using different ratio of shellac, zein and guar gum. From study of various literature it revealed that shellac, zein and guar gum released drug from dosage form at the pH of 6.9, 11.5, 7-9 respectively. The main problem associated with colon targeted drug delivery system is degradation of drug in the acidic environment of stomach to circumvent the present problem different combinations of shellac, zein and guar gum were employed in the formulation of colon targeted tablet. Several preformulation parameters were determined such as melting point, FTIR spectroscopy, preparation of calibration curve, determination of λmax and partition coefficient. After the preformulation studies, next steps were preparation of core tablets, evaluation of core of tablets and coating of tablets. The data obtained from preformulation study seven formulations were developed and evaluated for various parameters. Based on evaluated parameter such as weight variation, friability, dissolution study, invitro drug release etc. the F7 formulation show better results colon targeted tablets. Drug content in F7 formulation was 95% and drug release after 6 hrs was 96%. Formulation containing combination of shellac, zein and guar gum released least amount of drug in the acidic environment of stomach and released most of the drug in colon. It is evide

Colon targeting oral matrix tablets of mesalamine: Design, development and invitro evaluation

2020 ◽  
Vol 10 (1) ◽  
pp. 18-27
Author(s):  
Audinarayana N ◽  
Anala Srinivasulu ◽  
Vellore Sruthikumari ◽  
Likitha ◽  
Ananda Deepak V
Keyword(s):  
Drug Release ◽  
Guar Gum ◽  
Stability Study ◽  
Matrix Tablets ◽  
Drug Dissolution ◽  
Matrix Tablet ◽  
Cellulose Acetate Phthalate ◽  
Design Development ◽  
Release Pattern ◽  
The Matrix

The principle in this present research is to formulate Mesalamine containing colon targeted tablets by using different polymers and evaluate the effect of different polymers in drug release pattern. The matrix tablets of Mesalamine are formulated by polysaccharides based polymers like Cellulose acetate phthalate (CAP), Ethyl cellulose (EC), Guar gum (GG) and Xanthan gum (XG) which protects the drug to release in Stomach and Small Intestine. The invitro drug dissolution investigation of F2 (GG and XG) Matrix tablet was controlled by swelling into a viscous gel in colonic pH, which have been accomplished as the best tablet. The optimized tablet F2 was found to be stable in stability study (short term) with reproducible evaluation data, which also shows the highest swelling index, increased viscosity in colonic pH. The drug release pattern from the F2 formulation follows swelling and erosion behavior. From the data it show that F2 tablets suitable for providing colon targeted drug delivery.

PERILAKU DISOLUSI KETOPROFEN DAN INDOMETASIN FARNESIL TERSALUT GEL KITOSAN-GOM GUAR

2012 ◽  
Vol 12 (1) ◽  
Author(s):  
Purwantiningsih Sugita ◽  
Bambang Srijanto ◽  
Budi Arifin ◽  
Fithri Amelia ◽  
Mahdi Mubarok
Keyword(s):  
Room Temperature ◽  
Guar Gum ◽  
Tween 80 ◽  
Chitosan Solution ◽  
In Vitro Dissolution ◽  
Dissolution Profile ◽  
Magnetic Stirrer ◽  
Dissolution Behaviour ◽  
Shrimp Shell Waste

Chitosan, a modification of shrimp-shell waste, has been utilized as microcapsule. However, it’s fragile gel property needs to be strengthened by adding glutaraldehyde (glu) and natural hydrocolloid guar gum (gg). This research’s purposes were to study dissolution behaviour of ketoprofen and infar through optimum chitosan-guar gum microcapsule. Into 228.6 mL of 1.75% (w/v) chitosan solution in 1% (v/v) acetic acid,38.1 mL of gg solution was added with concentration variation of 0.35, 0.55, and 0.75% (w/v) for ketoprofen microcapsules and 0.05, 0.19, and 0.33% (w/v) for infar microcapsules, and stirred with magnetic stirrer until homogenous. Afterwards, 7.62mL of glu was added slowly under stirring, with concentrations varied: 3, 3.5, and 4% (v/v) for ketoprofen microcapsules, and 4, 4.5, and 5% (v/v) for infar microcapsules. All mixtures were shaked for 20 minutes for homogenization. All mixtures wereshaked for 20 minutes for homogenization. Into each  microcapsule mixture for ketoprofen, a solution of 2 g of ketoprofen in 250 mL of 96% ethanol was added, whereas solution of 100 mg of in 250 mL of 96% ethanol was added into each microcapsule mixture for infar. Every mixture was then added with 5 mL of 2% Tween-80 and stirred with magnetic stirrer for an hour at room temperature. Everymixture 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. The data of [gg], [glu], and medicine’s content from each microcapsule were treated with Minitab 14 software to obtain optimum [gg] and [glu] for microencapsulation. The dissolution behaviour of optimum ketoprofen and infar microcapsules were investigated. The result of optimization by using Minitab Release 14 software showed that among the microcapsule compositions of [gg] and [glu] were 0.35% (w/v) and 3.75% (v/v), respectively, optimum to coat ketoprofen, whereas [gg] and [glu] of 0.05% (w/v) and4.00% (v/v), respectively, optimum to coat infar, at constant chitosan concentration (1.75% [w/v]). In vitro dissolution profile showed that chitosan-guar gum gel microcapsule was more resistant in intestinal pH condition (rather basic) compared with that in gastric pH (very acidic).

Effect of adding guar gum to yogurt free fat and studying some of its properties

2020 ◽  
Vol 23 (13) ◽  
Author(s):  
Shaymaa Rifaat Khairi ◽  
Shaymaa Saady Lafta ◽  
Ebtisam F. Mousa
Keyword(s):  
Guar Gum

A Comparative Study of Matrix Tablets Designed by Different Methods

2017 ◽  
Vol 10 (2) ◽  
pp. 3645-3652
Author(s):  
Tulsi Bisht ◽  
Rishishwar Poonam
Keyword(s):  
Drug Release ◽  
Comparative Study ◽  
Guar Gum ◽  
Matrix Tablets ◽  
Wet Granulation ◽  
Matrix Tablet ◽  
Once Daily ◽  
Gum Acacia ◽  
Weight Variation ◽  
Evaluation Parameters

The aim of present work was to develop once daily sustained release matrix tablet of aceclofenac by wet granulation technique using natural gums i.e.: gum acacia, guar gum and Xanthan gum. In this present study matrix tablets were prepared using three different methods and a comparative study was done. Aceclofenac sodium being the newer derivative of diclofenac having short biological half life (4hrs.), so it requires more than one dose per day to maintain therapeutic dose. The prepared tablets were evaluated for various parameters like weight variation, hardness, swelling index, friability, percent drug release and various release profile like zero order, first order, Higuchi's, and Koshemeyrs-peppa. All the evaluation parameters met pharmacopoeial specifications and through dissolution studies it was matrix tablets prepared with method 2 shows heighest percent drug release and matrix tablet prepared by method 3 showed lowest percent drug release at the end of 8 hrs. (Shown in fig. 8, comparative release study of all three formulations). Matrix tablet of aceclofenac were successfully prepared and evaluated and it can be concluded that matrix tablet prepared with natural gums showed release rate for a prolonged time and can be of great importance for “once daily” tablet to reduce side effects and toxicity related with NSAIDs.  

Formulation of Oral Mucoadhesive Tablets using Mucilage Isolated from Buchanania lanzan spreng Seeds

2014 ◽  
Vol 7 (2) ◽  
pp. 2494-2503
Author(s):  
Sudarshan Singh ◽  
Ayaz Ahmad ◽  
Sunil Bothara B
Keyword(s):  
Drug Delivery ◽  
Guar Gum ◽  
Physical Property ◽  
Flow Property ◽  
Relative Effect ◽  
Losartan Potassium ◽  
In Vitro Dissolution ◽  
Wet Granulation ◽  
Microbial Count

The present study was taken to formulate and evaluate mucilage obtained from Buchanania lanzan spreng seeds (BL) belonging to family anacardiacea for oral mucoadhesive drug delivery system containing losartan potassium. Physiochemical characteristics of mucilage, such as swelling index, microbial count, viscosity, hydration capacity, flow property, and pH were studied. The mucilage was evaluated for its mucoadhesive properties in compressed tablet, containing losartan potassium. Granules were prepared by wet granulation process using polyvinylpyrrolidone as binding agent. Mucilage was used in four different concentrations i.e., 21, 42 and 55% w/w. The tablet were prepared and evaluated for its physical property. Further, in vitro dissolution and swelling index was determined. The property of bioadhesive strength of isolated mucilage was compared with Guar gum and HPMC E5LV, which was used as standard mucoadhesive agent concentration. Bioadhesive strength of the tablet was measured on the modified physical balance. Result revealed that tablets had good physiochemical properties, and drug release was retarded as concentration of mucilage was increased. The force of adhesion was obtained 0.1238N, 0.2822N, 0.5175N, 0.8679N and 0.3983N respectively for F1, F2, F3, F4 and F5. Formulations were subjected for study the effect of agitation at different rpm. Formulation showed relative effect on release of drug from formulation. All the formulations were subjected to stability studies for three months, all formulations showed stability with respect to release pattern. In conclusions, these results indicate that the seed mucilage of BL can be a suitable excipient for oral mucoadhesive drug delivery systems.  

Formulation and Evaluation of Sustained Release Dosage Forms of Norfloxacin

2018 ◽  
Vol 11 (6) ◽  
pp. 4331-4337
Author(s):  
C Suja ◽  
Sismy C
Keyword(s):  
Sustained Release ◽  
Guar Gum ◽  
In Vitro Release ◽  
Angle Of Repose ◽  
Prolonged Release ◽  
Weight Variation ◽  
Sustained Release Tablets ◽  
Release Study ◽  
Vitro Release

The goal of this study was to formulate and evaluate norfloxacin sustained release tablets. Norfloxacin sustained release tablets were prepared by wet granulation method using two polymers such as HPMC K 100 M (hydrophilic polymer) and guar gum (natural polymer) and with three polymer ratios (0.5, 1.0 and 1.5). The prepared granules were evaluated to preformulation studies such as angle of repose, bulk density, tapped density, bulkiness, compressibility index and Hauser’s ratio. All the parameters shows that the granules having good flow properties. Then the formulated tablets were taken to evaluation studies such as hardness, weight variation, friability, drug content and thickness. All the parameters were within the acceptable limits. IR spectral analysis showed that there was no interaction between the drug and polymers. The in vitro release study was performed in phosphate buffer pH 7.4 at 293 nm. The in vitro release study showed that if the polymer ratio is increased, then the release of the drug is prolonged. HPMC K 100M shows a prolonged release when compared to guar gum.

Advancement Of Changed Pulsincap Medicate Conveyance Arrangement Of Metronidazole For Tranquilize Focusing

2020 ◽  
Vol 2 (05) ◽  
pp. I-IV
Author(s):  
Roshni Jha ◽  
Anjali Minj
Keyword(s):  
Acetic Acid ◽  
Sodium Alginate ◽  
Guar Gum

A changed Pulsincap measurements type of metronidazole was created to target tranquilize discharge in the colon. Groups of hard gelatin cases were treated with formaldehyde keeping the tops in that capacity. Metronidazole pellets arranged by expulsion spheronization technique were consolidated into these particular container shells and stopped with polymers guar gum, hydroxypropylmethylcellulose 10K, carboxymethylcellulose sodium and sodium alginate independently at fixations 20 mg, 30 mg and 40 mg. The filled cases were totally covered with 5% cellulose acetic acid derivation phthalate to forestall variable gastric purging. All the definitions were tested to decide sedate substance and the capacity of the adjusted Pulsincap to give colon-explicit medication conveyance was surveyed by in vitro tranquilize discharge concentrates in cushion pH 1.2 for 2 h, pH 7.4 (reproduced intestinal liquid) for 3 h and pH 6.8 (animated colonic liquid) for 7 h. The outcomes showed that critical medication discharge happened simply after 5 h from the beginning of analysis.

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