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Relevant bibliographies by topics / Nutrition. Digestion. Gastric juice

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Academic literature on the topic 'Nutrition. Digestion. Gastric juice'

Author: Grafiati

Published: 4 June 2021

Last updated: 3 February 2022

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Journal articles on the topic "Nutrition. Digestion. Gastric juice"

1

BEAUMONT, WILLIAM. "EXPERIMENTS AND OBSERVATIONS ON THE GASTRIC JUICE AND THE PHYSIOLOGY OF DIGESTION." Nutrition Reviews 35, no. 6 (2009): 144–45. http://dx.doi.org/10.1111/j.1753-4887.1977.tb06570.x.

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2

Sullivan, Louise M., Joseph J. Kehoe, Lillian Barry та ін. "Gastric digestion of α-lactalbumin in adult human subjects using capsule endoscopy and nasogastric tube sampling". British Journal of Nutrition 112, № 4 (2014): 638–46. http://dx.doi.org/10.1017/s0007114514001196.

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In the present study, structural changes in the milk protein α-lactalbumin (α-LA) and its proteolysis were investigated for the potential formation of protein–fatty acid complexes during in vivo gastric digestion. Capsule endoscopy allowed visualisation of the digestion of the test drinks, with nasogastric tubes allowing sampling of the gastric contents. A total of ten healthy volunteers had nasogastric tubes inserted into the stomach and ingested test drinks containing 50 g/l of sucrose and 25 g/l of α-LA with and without 4 g/l of oleic acid (OA). The samples of gastric contents were collected for analysis at 3 min intervals. The results revealed a rapid decrease in the pH of the stomach of the subjects. The fasting pH of 2·31 (sd 1·19) increased to a pH maxima of pH 6·54 (sd 0·29) after ingestion, with a subsequent decrease to pH 2·22 (sd 1·91) after 21 min (n 8). Fluorescence spectroscopy and Fourier transform IR spectroscopy revealed partial protein unfolding, coinciding with the decrease in pH below the isoelectric point of α-LA. The activity of pepsin in the fasting state was found to be 39 (sd 12) units/ml of gastric juice. Rapid digestion of the protein occurred: after 15 min, no native protein was detected using SDS–PAGE; HPLC revealed the presence of small amounts of native protein after 24 min of gastric digestion. Mirocam® capsule endoscopy imaging and video clips (see the online supplementary material) revealed that gastric peristalsis resulted in a heterogeneous mixture during gastric digestion. Unfolding of α-LA was observed during gastric transit; however, there was no evidence of a cytotoxic complex being formed between α-LA and OA.

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3

Almaas, Hilde, Ellen Eriksen, Camilla Sekse, et al. "Antibacterial peptides derived from caprine whey proteins, by digestion with human gastrointestinal juice." British Journal of Nutrition 106, no. 6 (2011): 896–905. http://dx.doi.org/10.1017/s0007114511001085.

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Peptides in caprine whey were identified afterin vitrodigestion with human gastrointestinal enzymes in order to determine their antibacterial effect. The digestion was performed in two continuing steps using human gastric juice (pH 2·5) and human duodenal juice (pH 8) at 37°C. After digestion the hydrolysate was fractionated and 106 peptides were identified. From these results, twenty-two peptides, located in the protein molecules, were synthesised and antibacterial activity examined. Strong activity of the hydrolysates was detected againstEscherichia coliK12,Bacillus cereusRT INF01 andListeria monocytogenes, less activity againstStaphylococcus aureusATCC 25 923 and no effect onLactobacillus rhamnosusGG. The pure peptides showed less antibacterial effect than the hydrolysates. When comparing the peptide sequences from human gastrointestinal enzymes with previously identified peptides from non-human enzymes, only two peptides, β-lactoglobulin f(92–100) and β-casein f(191–205) matched. No peptides corresponded to the antibacterial caprine lactoferricin f(14–42) or lactoferrampin C f(268–284). Human gastrointestinal enzymes seem to be more complex and have different cleavage points in their protein chains compared with purified non-human enzymes. Multiple sequence alignment of nineteen peptides showed proline-rich sequences, neighbouring leucines, resulting in a consensus sequence LTPVPELK. In such a way proline and leucine may restrict further proteolytic processing. The present study showed that human gastrointestinal enzymes generated different peptides from caprine whey compared with non-human enzymes and a stronger antibacterial effect of the hydrolysates than the pure peptides was shown. Antimicrobial activity against pathogens but not against probiotics indicate a possible host-protective activity of whey.

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4

Shui-Zhong, Luo, Wu Xiang-Zhi, Xu Pei-Lin, et al. "Enzyme-Resistant Dextrin from Chinese Yam Starch for Potential Application in Beverage Industry: Preparation, Physicochemical Properties and In Vitro Digestion." Current Topics in Nutraceutical Research 17, no. 2 (2018): 140–47. http://dx.doi.org/10.37290/ctnr2641-452x.17:140-147.

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Preparation conditions, physicochemical properties and in vitro digestibility of enzyme-resistant dextrin from Chinese yam starches, which are native, easily accessible and cheap raw materials in China, were investigated in the current study. The results showed that the enzyme-resistant fraction content in enzyme-resistant dextrin increased and the whiteness of the enzyme-resistant dextrin decreased with the increasing concentrations of hydrochloric and citric acids and the rising heating temperatures, and the prolonged heating times. Considering the manufacturing cost and the beneficial usage, the enzyme-resistant dextrin produced by heating of Chinese yam starch in the presence of hydrochloric (0.11% dsb) and citric (0.2% dsb) acids at 150°C for 60min was selected. Enzyme-resistant dextrin had a low molecular weight of about 6800 Da and rich “non-digestible” α-1,2 glycosidic bond and was well-soluble in water, stable at pH 3.0–7.0 or after heating at 85°C for 0.5 h showed, high thermal stability and high resistant to the artificial gastric juice and small intestinal fluids. These characteristics make the selected enzyme-resistant dextrin suitable for use in the soft drink industry as the soluble dietary fibres and prebiotics in the beverages. This would provide an excellent opportunity to reduce the caloric value of the beverages and exert a beneficial effect on the intestinal microflora of people consuming beverages enriched with enzyme-resistant dextrins.

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5

Nilsson, Urban, and Inger Björck. "Availability of Cereal Fructans and Inulin in the Rat Intestinal Tract." Journal of Nutrition 118, no. 12 (1988): 1482–86. http://dx.doi.org/10.1093/jn/118.12.1482.

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Abstract The fate of cereal fructans and inulin in the gastrointestinal tract was investigated by using a rat model. Male Wistar rats received diets containing 5.0% of a preparation of cereal fructans or 4.7 or 9.4% inulin. Each diet was tested with or without Nebactin, an antibiotic drug given to suppress the intestinal microflora. The availability of fructans in the upper gastrointestinal tract was calculated from the recovery in feces in Nebacitin-treated rats. Animals receiving cereal fructans developed diarrhea, which made it impossible to measure the bioavailability of this substrate. With inulin, the extent of digestion and absorption appeared to be 18–26%. This might, at least to some degree, be explained by hydrolysis by gastric juice in the stomach. Thus, in an in vitro assay, mild acid hydrolysis (0.05 M HCl, 37°C, 120 min) converted about 8% of inulin to free fructose. The apparent digestibility of the fructans was calculated from its recovery in feces from untreated rats. Only minute amounts of fructans could be detected, hence, cereal fructans as well as inulin reaching the hindgut appeared to be almost completely fermentable.

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6

Di, Tong, Guijie Chen, Yi Sun, Shiyi Ou, Xiaoxiong Zeng, and Hong Ye. "In vitro digestion by saliva, simulated gastric and small intestinal juices and fermentation by human fecal microbiota of sulfated polysaccharides from Gracilaria rubra." Journal of Functional Foods 40 (January 2018): 18–27. http://dx.doi.org/10.1016/j.jff.2017.10.040.

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7

de Haan, Pim, Margaryta A. Ianovska, Klaus Mathwig, et al. "Digestion-on-a-chip: a continuous-flow modular microsystem recreating enzymatic digestion in the gastrointestinal tract." Lab on a Chip 19, no. 9 (2019): 1599–609. http://dx.doi.org/10.1039/c8lc01080c.

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8

Shpug, G. M. ""Conveyor machine" for collecting gastric juice." Kazan medical journal 32, no. 2-3 (2021): 231–33. http://dx.doi.org/10.17816/kazmj80747.

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The study of gastric digestion has a long history. Since the time of the first researchers who had to kill animals (Tiedemann and Gmelin) in order to get 7-10 kb. see gastric contents, the development of the method of obtaining gastric juice goes through a number of stages.

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9

Dubois, A. "Diet and gastric digestion." American Journal of Clinical Nutrition 42, no. 5 (1985): 1003–5. http://dx.doi.org/10.1093/ajcn/42.5.1003.

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10

Perman, J. A. "Digestion and Absorption of Fruit Juice Carbohydrates." Journal of the American College of Nutrition 15, sup5 (1996): 12S—17S. http://dx.doi.org/10.1080/07315724.1996.10720469.

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Dissertations / Theses on the topic "Nutrition. Digestion. Gastric juice"

1

Sandin, Andreas. "Studies of gastrin and gastric secretion in the horse /." Uppsala : Swedish Univ. of Agricultural Sciences (Sveriges lantbruksuniv.), 1999. http://epsilon.slu.se/avh/1999/91-576-5908-7.pdf.

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2

Bartlett, Ellis Rebecca J. "In vitro comparison of gastric aspirate methods and feeding tube properties on the quantity and reliability of obtained aspirate volume." Thesis, 2013. http://hdl.handle.net/1805/3690.

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Indiana University-Purdue University Indianapolis (IUPUI)<br>Gastric residual volume (GRV) is a clinical assessment to evaluate gastric emptying and enteral feeding tolerance. Factors such as the tube size, tube material, tube port configuration, placement of the tube in the gastric fluid, the amount of fluid and person completing the assessment may influence the accuracy of residual volume assessment. Little attention has been paid to assessing the accuracy of GRV measurement when the actual volume being aspirated is known, and no studies have compared the accuracy in obtaining RV using the three different techniques reported in the literature that are used to obtain aspirate in practice (syringe, suction, and gravity drainage). This in vitro study evaluated three different methods for aspirating feeding formula through two different tube sizes (10 Fr [small] and 18 Fr [large]), tube materials (polyvinyl chloride and polyurethane), using four levels of nursing experience (student, novice, experienced and expert) blinded to the five fixed fluid volumes of feeding formula in a simulated stomach, to determine if the RV can be accurately obtained. The study design consisted of a 3x2x2x4x5 completely randomized factorial ANOVA (with a total of 240 cells) and 479 RV assessments were made by the four nurse participants. All three methods (syringe, suction and gravity) used to aspirate RV did not perform substantially well in aspirating fluid, and on average, the methods were able to aspirate about 50% of the volume available. The syringe and suction techniques were comparable and produced higher proportions of RVs, although the interrater reliability of RV assessment was better with the syringe method. The gravity technique generally performed poorly. Overall, the polyvinyl chloride material and smaller tubes were associated with higher RV assessments. RV assessment is a variable assessment and the three methods did not perform well in this in vitro study. These findings should be further explored and confirmed using larger samples. This knowledge will be important in establishing the best technique for assessing RV to maximize EN delivery in practice and will contribute to future research to test strategies to optimize EN intake in critically ill patients.

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Books on the topic "Nutrition. Digestion. Gastric juice"

1

Beaumont, William. Experiments and observations on the gastric juice and the physiology of digestion: William Beaumont. Together with a biographical essay, "William Beaumont : a pioneer American physiologist / by Sir William Osler. Dover, 1996.

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2

Myer, Jesse S. Life And Letters Of Dr. William Beaumont: Including Hitherto Unpublished Data Concerning The Case of Alexis St. Martin. Kessinger Publishing, LLC, 2007.

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3

Myer, Jesse S. Life And Letters Of Dr. William Beaumont: Including Hitherto Unpublished Data Concerning The Case of Alexis St. Martin. Kessinger Publishing, LLC, 2007.

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4

Experiments and Observations on the Gastric Juice and the Physiology of Digestion. Kessinger Publishing, 2003.

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Book chapters on the topic "Nutrition. Digestion. Gastric juice"

1

Mathur, KC. "Stomach: Gastric Juice and Digestion." In Short Textbook of Physiology. Jaypee Brothers Medical Publishers (P) Ltd., 2006. http://dx.doi.org/10.5005/jp/books/10766_99.

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