Rheology of Barium Sulfate Suspensions and Pre-thickened Beverages Used in Diagnosis and Treatment of Dysphagia

Abstract Pre-thickened beverages and barium sulfate suspensions are used in the treatment and diagnosis of dysphagia. These liquids are labeled nectar consistency (NC), honey consistency (HC) etc. These labels are rather misleading and do not represent the actual rheological character of the liquids. We carefully investigated the rheology of these liquids to assist both in their formulation and use for dysphagic patients. Steady state flow properties, thixotropy, dynamic response, and creep recovery behavior were investigated for six beverages and two barium sulfate suspensions. All samples exhibited a shear-thinning behavior. The flow curves of all samples followed both Herschel-Bulkley and Casson models. HC barium sulfate suspension exhibited higher yield stress, σo, and higher storage modulus, G’, than their fluid food counterparts. In contrast, NC barium sulfate suspension had lower σo, and G’ than some of the liquid food counterparts. Frequency spectra of NC samples were similar to that of a macromolecular solution with both G’ and loss modulus, G’’, increasing with frequency; whereas those of HC samples were similar to that of a gel with a little dependency of G’ and G’’ over frequency. Stress sweep experiments showed that the linear viscoelastic region of fluid foods and barium sulfate suspensions extended up to 1 and 10 Pa, respectively. Thus, significant differences exist in the rheological properties of both pre-thickened and videofluoroscopy fluids currently used for diagnosis and treatment of dysphagia.

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Viscoelastic analysis of oat grain within linear viscoelastic region by using dynamic mechanical analyzer

International Journal of Food Engineering ◽

10.1515/ijfe-2018-0350 ◽

2020 ◽

Vol 16 (4) ◽

Author(s):

Nan Zhao ◽

Bo-wen Li ◽

Ying-dan Zhu ◽

Dong Li ◽

Li-jun Wang

Keyword(s):

Moisture Content ◽

Storage Modulus ◽

Heating Temperature ◽

Loss Modulus ◽

Creep Recovery ◽

Dynamic Mechanical Analyzer ◽

Frequency Sweep ◽

Dynamic Mechanical ◽

Linear Viscoelastic Region ◽

Linear Viscoelastic

AbstractThe stress relaxation, creep-recovery, temperature, and frequency sweep tests were performed within the linear viscoelastic region by using a dynamic mechanical analyzer to investigate the viscoelastic characteristic of oat grain. The result showed that 5-element Maxwell and Burgers model were able to describe viscoelastic behaviors better. The relaxation stress decreased with the increasing moisture content from 6.79 to 23.35%, while the creep strain increased as well as the final percentage recovery decreased from 58.61 to 32.50%. In frequency sweep, storage modulus increased with the increasing frequency. In temperature sweep, there was a clear turning point in storage modulus, loss modulus, and tan delta curves with increasing temperature. The turning value of 167.47, 147.44, 134.27, 132.41, 110.28, and 92.62 °C detected in the tan delta were regarded as the best glass transition temperatures. This temperature was found to be lower than gelatinization heating temperature and decrease with the increase of moisture content. The crystalline structure of oat exhibited a typical A-type pattern and corresponding crystallinity increased from 22.03 to 31.86% with increasing moisture content. The scanning electron microscopy (SEM) micrograph of oat section was found that the size and adhesive effect of starch granules increased due to hydration.

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An Insight into the Polymeric Nanoparticles Applications in Diabetes Diagnosis and Treatment

Mini-Reviews in Medicinal Chemistry ◽

10.2174/1389557521666211116123002 ◽

2021 ◽

Vol 21 ◽

Author(s):

Parisa Dehghani ◽

Monireh Esameili Rad ◽

Atefeh Zarepour ◽

Ponnurengam Malliappan Sivakumar ◽

Ali Zarrabi

Keyword(s):

Polymeric Nanoparticles ◽

Synthetic Polymers ◽

Diagnostic Methods ◽

Diagnosis And Treatment ◽

Diabetes Diagnosis ◽

Transport Mechanisms ◽

Different Types ◽

Treatment And Diagnosis ◽

Insight Into

: Diabetes mellitus (DM) is a type of chronic metabolic disease that has affected millions of people worldwide and is known with a defect in the amount of insulin secretion, insulin functions, or both. This deficiency leads to an increase in the amounts of glucose, which could be accompanied by long-term damages to other organs such as eyes, kidneys, heart, and nervous system. Thus, introducing an appropriate approach for diagnosis and treatment of different types of DM is the aim of several researches. By the emergence of nanotechnology and its application in medicine, new approaches were presented for these purposes. The object of this review article is to introduce different types of polymeric nanoparticles (PNPs), as one of the most important classes of nanoparticles, for diabetic management. To achieve this goal, at first, some of the conventional therapeutic and diagnostic methods of DM will be reviewed. Then, different types of PNPs, in two forms of natural and synthetic polymers with different properties, as a new method for DM treatment and diagnosis will be introduced. In the next section, the transport mechanisms of these types of nano-carriers across the epithelium, via paracellular and transcellular pathways will be explained. Finally, the clinical use of PNPs in the treatment and diagnosis of DM will be summarized. Based on the results of this literature review, PNPs could be considered one of the most promising methods for DM management.

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Barium Sulfate Suspension

10.31003/uspnf_m7135_01_01 ◽

2021 ◽

Keyword(s):

Barium Sulfate ◽

Barium Sulfate Suspension

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522. Garacteristics of Optimized Barium Sulfate Suspension in Upper Gastro-Intestinal Study (Part 4)

Japanese Journal of Radiological Technology ◽

10.6009/jjrt.kj00003324261 ◽

1991 ◽

Vol 47 (8) ◽

pp. 1552

Author(s):

Tadasi Satou ◽

Seiji Ebine ◽

Yosie Nagai

Keyword(s):

Barium Sulfate ◽

Barium Sulfate Suspension

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SYNTHESIS AND VISCOELASTIC BEHAVIORS OF POLY(ANILINE-CO-O-ETHOXYANILINE) PARTICLES SUSPENDED ELECTRORHEOLOGICAL FLUID

International Journal of Modern Physics B ◽

10.1142/s0217979201005118 ◽

2001 ◽

Vol 15 (06n07) ◽

pp. 649-656 ◽

Cited By ~ 10

Author(s):

H. J. CHOI ◽

J. W. KIM ◽

M. S. SUH ◽

M. J. SHIN ◽

K. TO

Keyword(s):

Particle Size ◽

Silicone Oil ◽

Loss Modulus ◽

Chemical Oxidation ◽

Steady Shear ◽

Rheological Parameters ◽

Linear Viscoelastic Region ◽

Linear Viscoelastic ◽

Er Fluids ◽

Poly Aniline

Copolyanilines are synthesized by a chemical oxidation of aniline and o-ethoxyaniline with various molar ratios in an acidic media, and then characteristics of these polymers such as chemical structure, particle size and the particle size distribution were examined by using FT-IR, SEM and particle size analyzer, respectively. Suspensions of copolyaniline containing ethoxy group, namely poly(aniline-co-o-ethoxyaniline), in silicone oil have been investigated as one of many potential candidates for dry-base electrorheological (ER) fluid systems. Rotational rheometer (Physica) equipped with a high voltage generator was used to characterize the rheological properties of ER fluids from both steady shear and dynamic tests. From the steady shear experiment, we obtained flow properties and found that ER fluids exhibited the yield phenomenon. On the other hand, viscoelastic property was also obtained from the dynamic experiment. Since viscoelastic properties for ER fluids are mainly dominated by the particle chain structure, the state at different time scale was analyzed from the rheological parameters such as storage modulus (G'), loss modulus (G'') and tan δ. We conducted a strain amplitude sweep at 1 Hz under an applied electric field to determine a linear viscoelastic region first. The G' and G'' were then measured by a frequency sweep from 0.1 to 100 Hz in the linear viscoelastic region.

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Characterization of viscoelastic properties of minced beef meat thawed by ohmic and conventional methods

Food Science and Technology International ◽

10.1177/1082013219888300 ◽

2019 ◽

Vol 26 (4) ◽

pp. 277-290 ◽

Cited By ~ 2

Author(s):

Mutlu Cevik ◽

Filiz Icier

Keyword(s):

Ambient Temperature ◽

Viscoelastic Properties ◽

Cold Water ◽

Complex Modulus ◽

Loss Modulus ◽

Complex Viscosity ◽

Creep Recovery ◽

Recoverable Compliance ◽

Meat Samples ◽

Minced Meat

Frozen minced meat samples having fat contents of 2%, 10% and 18% were thawed using different methods (refrigeration thawing at ambient temperature of +4 ℃, under running cold water (+4 ℃) thawing, ohmic thawing for 10, 13 and 16 V/cm). Viscoelastic properties were determined by using rheological tests (oscillation and creep/recovery tests). Storage modulus, loss modulus, complex modulus, loss tangent, dynamic viscosity and complex viscosity values of minced meat samples increased as fat content increased. As frequency value increased, the modulus values of meat samples increased but dynamic and complex viscosity values of the samples decreased. The minced meat samples thawed by different methods had recoverable compliance values. The compliance values of meat samples during creep region can be well characterized by Burgers model. Ohmic thawing can be used as an alternative thawing method since it resulted in similar rheological properties of minced meat samples compared to refrigeration thawing at ambient temperature of +4 ℃ and under running cold water (+4℃) thawing.

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Viscosities reproductive patterns for use in videofluoroscopy and rehabilitation therapy of dysphagic patients

Arquivos de Gastroenterologia ◽

10.1590/s0004-28032007000400004 ◽

2007 ◽

Vol 44 (4) ◽

pp. 297-303 ◽

Cited By ~ 6

Author(s):

Milton M. B. Costa ◽

Juliana T. de Almeida ◽

Eliane Sant'Anna ◽

Gláucia M. Pinheiro

Keyword(s):

Barium Sulfate ◽

Rotation Speed ◽

Sulfate Solution ◽

Distilled Water ◽

Nutritional Rehabilitation ◽

Infrared Thermometer ◽

Rehabilitation Therapy ◽

Reproductive Patterns ◽

Dysphagic Patients ◽

Oral Diet

BACKGROUND: Usually the suitable consistence identified and indicated as safe by videofluoroscopic method has been empirically obtained by association of barium sulfate solution with meals. However, it has been evidenced to be very difficult to reproduce this consistence in nutritional rehabilitation therapy from subjective information. AIM: To build two reproductive similar crescent viscosities series of solutions, with and without barium sulfate, to be used, the first, as radiological contrasted mean and the second, as base to reproduce the defined safer consistence, in the oral diet rehabilitation of dysphagic patients. METHODS: Two viscosity solutions series were obtained from starch and distilled water with and without 100% barium sulfate solution. The viscosity levels were defined step by step with digital viscosimeter (Brookfield, model LVTD-II) and with infrared thermometer Icel TD - 960. The fluids viscosity was register in centipoises, with their inferior and superior values followed by complimentary information about spindle kind, rotation speed and temperature. RESULTS: The two series of solutions, with and without barium sulfate, could be defined as aqueous (>1-143,5 cP), fine liquid (428 - 551 cP), thick liquid (4.284 -7.346,5 cP)), pasty (7.346,4 - 13.035 cP), pasty thick (19.260 - 34.320 cP) and creamy (163.500 - 255.300 cP). CONCLUSION: The study could offer reproductive formulas, with and without contrast mean, to be follow for obtaining the desirable viscosity to be used, each of them, in radiological evaluation and in nutritional diet minimizing the gaps fails between evaluation and therapy.

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Preparation of Octadecyl Amine Grafted over Waste Rubber Powder (ODA-WRP) and Properties of Its Incorporation in SBS-Modified Asphalt

Polymers ◽

10.3390/polym11040665 ◽

2019 ◽

Vol 11 (4) ◽

pp. 665 ◽

Cited By ~ 7

Author(s):

Meizhao Han ◽

Xiang Zeng ◽

Yaseen Muhammad ◽

Jing Li ◽

Jing Yang ◽

...

Keyword(s):

Loss Modulus ◽

Creep Recovery ◽

Rubber Powder ◽

Modified Asphalt ◽

Grafting Reaction ◽

Waste Rubber ◽

Covalent Grafting ◽

Waste Rubber Powder ◽

Sbs Modified Asphalt ◽

Octadecyl Amine

Through a covalent grafting reaction, octadecyl amine (ODA) was grafted on the surface of waste rubber powder (WRP) to obtain an ODA-WRP modifier, which was in turn compounded with a styrene-butadiene-styrene block copolymer (SBS) to prepare ODA-WRP/SBS-modified asphalt. The three major indicators (i.e., dynamic shear rheometer (DSR), multi-stress creep recovery (MSCR), and separation tests) showed that 1-ODA-WRP effectively improved the complex shear modulus (G*), elastic Modulus (G′), and loss modulus (G″) by 36.47%, 40.57%, and 34.77% (64 °C and 10 Hz), respectively, as compared to pristine SBS-modified asphalt. Fluorescence microscopy (FM) results concluded that the enhancement in mechanical properties was accredited to the better compatibility of various components in asphalt and establishment of network structure between ODA-WRP and SBS in ODA-WRP/SBS-modified asphalt. Fourier infrared spectroscopy (FT-IR) and scanning electron microscope (SEM) analyses confirmed the successful synthesis of ODA-WRP. This study could be of great help in synthesizing ODA-WRP asphalt modified with SBS for highways and construction applications.

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