Relevant bibliographies by topics / HFHC

Academic literature on the topic 'HFHC'

Author: Grafiati
Published: 10 December 2022
Last updated: 28 January 2023

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Journal articles on the topic "HFHC"

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Hammoud, Rola, Emanuela Pannia, Chih-Sheng Liao, Ruslan Kubant, Erland Arning, Teodoro Bottiglieri, Zdenka Pausova, and G. Harvey Anderson. "Choline Supplementation Mitigates the Adverse Effects of a High Folic Acid Maternal Diet on Food Intake Regulation in the Offspring." Current Developments in Nutrition 4, Supplement_2 (May 29, 2020): 1806. http://dx.doi.org/10.1093/cdn/nzaa067_033.

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Abstract Objectives Folic acid (FA) intake by many women in North America is exceeding recommendations. We have shown that high maternal FA induces methylation-dependent programming of energy regulation associated with an obesogenic phenotype in adult rat offspring. However, it is unclear if this is a direct effect of high FA or due to an imbalance between FA and other methyl-nutrients (i.e., choline) in the 1-carbon cycle. Unlike FA, choline intake by women is below recommendations and is absent from most prenatal supplements, potentially affecting fetal development. The objective of this study was to examine the mechanisms and effects of choline content in high FA maternal diets on in-utero programming of energy regulation and later-life offspring phenotype. Methods Pregnant Wistar rats were fed an AIN-93 G diet with recommended FA and choline (1X, RFRC, control), or 5X-FA diet with choline at 0.5X-(HFLC), 1X-(HFRC), or 2.5X- (HFHC). In pups at birth, brain and liver 1-carbon metabolites, hypothalamic DNA methyltransferase (DNMT) activity and global DNA methylation (5-mC%) were measured. At weaning, one male pup/dam was fed the control diet and weekly weight-gain and food intake were recorded for 20 weeks. Results Offspring born to dams on the HFLC and HFRC, but not HFHC diet, had higher food intake (P < 0.05) and weight-gain (P < 0.01) than controls. In liver at birth, free choline was lower in HFHC than in HFLC pups, but betaine was unaffected. In contrast, in brains, betaine but not free choline concentrations, directly reflected the maternal choline diets. These results suggest that choline may modulate central food intake pathways via the methyl-donor betaine, warranting further investigation. Hypothalamic DNMT activity was highest (P < 0.05) in HFLC pups but global methylation was not affected. Thus, gene expression by RNA sequencing and gene-specific methylation in the hypothalamus is in progress to elucidate the mechanisms underlying the observed phenotype. Conclusions Increased maternal choline mitigates the high FA diet induced increase in body weight and food intake in the adult offspring and results in tissue-specific changes in 1-carbon metabolism at birth. These findings have potential application to human health, providing support to optimize choline and FA intakes by women of childbearing age. Funding Sources CIHR-INMD.
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Valdes, J., A. Armas, J. Gagné Sansfaçon, V. Reyes-Nicolas, N. Rivard, G. Marrero, N. Perreault, and A. Menendez. "A259 HIGH-FAT/HIGH-CHOLESTEROL DIETS PREDISPOSE THE HOST TO EXACERBATED ENTERIC INFECTIONS." Journal of the Canadian Association of Gastroenterology 3, Supplement_1 (February 2020): 136–37. http://dx.doi.org/10.1093/jcag/gwz047.258.

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Abstract Background High-fat/high-cholesterol diets are a well established risk factor for cardiovascular and metabolic diseases, given their propensity to trigger perturbations ranging from altering whole body lipid profile to the induction of intestinal dysbiosis. However much less is known about their effects on the host’s susceptibility to enteric infections. Aims To determine the effects of high-fat/high-cholesterol diets over the host’s susceptibility to enteric bacterial infections and identify the underlying molecular mechanisms. Methods C57BL/6 mice were given two different high-fat/high-cholesterol diets; HFHC (40% kcal fat, 1.25% cholesterol) or HFHCC (40% kcal fat, 1.25% cholesterol, 0.5% sodium cholate) and a control, normal diet (ND, 10% kcal fat, 0% cholesterol, 0% sodium cholate). After four weeks of administration, animals were euthanized and colonic tissue samples taken for histology, immunofluorescence, gene expression analyses, total protein lysates and microbiome sequencing (16S). A separated group of animals was gavaged with FITC-dextran to measure intestinal permeability. Mice fed with the diets for three weeks were infected with ~5x108 cfu of Citrobacter rodentium DBS100/StrpR by oral gavage, and kept on the corresponding diets after the infections. Bacterial shedding in the feces was followed for up to 30 days after infection. Results Administration of the HFHC and HFHCC diets caused an increase in intestinal permeability. Colonic sections stained with H&E and alcian blue evidenced a decreased in the number of mucin-filled goblet cells and a thinner mucus layer, suggesting a defect in the assembly and/or stability of the mucus layer. Expression analyses revealed a drop in the mRNA levels of Muc1 and Muc2, suggesting reduced mucin production. The concentration of IgA was slightly reduced in colon lysates and the transcript levels of the antimicrobial peptide genes Ang4, Leap2 and Cramp were also significantly reduced. Immunofluorescent microscopy showed that goblet cell granules of HFHC- and HFHCC-fed mice were devoid of Relmβ and Tff3, indicating defective production of those two factors critical for intestinal epithelial defense and homeostasis. Collectively, our results suggest that HFHC and HFHCC diets induce differentiation and functional defects in goblet cells. Fecal shedding of C. rodentium showed an increased bacterial burden in HFHC- and HFHCC-fed animals, indicating a more aggressive bacterial infection, accompanied by increased epithelial damage. Conclusions Consumption of high-fat/high cholesterol diets perturb the colonic homeostasis and alter intestinal defenses and the integrity of the intestinal barrier, predisposing the host to a higher susceptibility to enteric infections. Funding Agencies CIHRNSERC
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Kamada, Yoshihiro, Shinichi Kiso, Yuichi Yoshida, Norihiro Chatani, Takashi Kizu, Mina Hamano, Mayumi Tsubakio, et al. "Estrogen deficiency worsens steatohepatitis in mice fed high-fat and high-cholesterol diet." American Journal of Physiology-Gastrointestinal and Liver Physiology 301, no. 6 (December 2011): G1031—G1043. http://dx.doi.org/10.1152/ajpgi.00211.2011.

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Recent studies indicate an accelerated progression of nonalcoholic steatohepatitis (NASH) in postmenopausal women. Hypercholesterolemia, an important risk factor for NASH progression, is often observed after menopause. This study examined the effects of estrogen on NASH in ovariectomized (OVX) mice fed a high-fat and high-cholesterol (HFHC) diet. To investigate the effects of estrogen deficiency, OVX mice and sham-operated (SO) mice were fed normal chow or HFHC diet for 6 wk. Next, to investigate the effects of exogenous estrogen replenishment, OVX mice fed with HFHC diet were treated with implanted hormone release pellets (containing 17β-estradiol or placebo vehicle) for 6 wk. OVX mice on the HFHC diet showed enhanced liver injury with increased liver macrophage infiltration and elevated serum cholesterol levels compared with SO-HFHC mice. Hepatocyte monocyte chemoattractant protein-1 (MCP1) protein expression in OVX-HFHC mice was also enhanced compared with SO-HFHC mice. In addition, hepatic inflammatory gene expressions, including monocytes chemokine (C-C motif) receptor 2 (CCR2), were significantly elevated in OVX-HFHC mice. Estrogen treatment improved serum cholesterol levels, liver injury, macrophage infiltration, and inflammatory gene expressions in OVX-HFHC mice. Moreover, the elevated expression of liver CCR2 and MCP1 were decreased by estrogen treatment in OVX-HFHC mice, whereas low-density lipoprotein dose dependently enhanced CCR2 expression in THP1 monocytes. Our study demonstrated that estrogen deficiency accelerated NASH progression in OVX mice fed HFHC diet and that this effect was improved by estrogen therapy. Hypercholesterolemia in postmenopausal women would be a potential risk factor for NASH progression.
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Zhuang, Zhen-Jie, Chao-Wen Shan, Bo Li, Min-Xia Pang, Han Wang, Yan Luo, Yin-lan Liu, et al. "Linarin Enriched Extract Attenuates Liver Injury and Inflammation Induced by High-Fat High-Cholesterol Diet in Rats." Evidence-Based Complementary and Alternative Medicine 2017 (2017): 1–9. http://dx.doi.org/10.1155/2017/4701570.

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The aim of this study was to explore the potential beneficial effects of linarin enriched Flos Chrysanthemi extract (Lin-extract) on nonalcoholic steatohepatitis (NASH) induced by high-fat high-cholesterol (HFHC) diet in rats. SD rats received normal diet, HFHC diet, or HFHC diet plus different doses of Lin-extract. The liver content of triglyceride and total cholesterol markedly increased in HFHC diet-fed model rats while middle and high dose of Lin-extract lowered liver cholesterol significantly. The expression of stearoyl-CoA desaturase (SCD1) was upregulated by HFHC diet and further elevated by high dose Lin-extract. High dose of Lin-extract also markedly lowered the serum alanine aminotransferase (ALT) and aspartate aminotransferase (AST) and inhibited the activation of c-Jun N-terminal kinase (JNK) induced by HFHC in livers. The HFHC-increased mRNA levels of hepatic inflammation cytokines, including monocyte chemotactic protein-1 (MCP-1), tumor necrosis factor-α(TNF-α), and chemokine (C-X-C motif) ligand 1 (CXCL1), were suppressed by Lin-extract dose-dependently. Furthermore, pathology evaluation showed that high dose Lin-extract greatly improved lobular inflammation. Our results suggest that Lin-extract could attenuate liver injury and inflammation induced by HFHC diet in rats. Its modulatory effect on lipid metabolism may partially contribute to this protective effect.
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Kim, Hye-Lin, You Mee Ahn, So Min Lee, Chang-Seob Seo, Seong-Hwan Park, Ok-Sun Bang, and Jeeyoun Jung. "Anti-Obesity Effects of Aqueous Extracts of Sunbanghwalmyung-Eum in High-Fat- and High-Cholesterol-Diet-Induced Obese C57BL/6J Mice." Nutrients 14, no. 14 (July 17, 2022): 2929. http://dx.doi.org/10.3390/nu14142929.

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Sunbanghwalmyung-eum (SBH) is a traditional herbal medicine that exhibits various pharmacological properties, such as antioxidant, anti-inflammatory, and anticancer activities. In this study, we investigated the systemic anti-obesity effects of an aqueous extract of SBH in the liver, adipose, and muscle tissue from high-fat and high-cholesterol diet (HFHCD)-induced obese C57BL/6J mice. After 6 weeks of an HFHCD, the mice were continuously fed HFHC with oral administration of SBH (100 mg/kg/day), Sim (simvastatin, 5 mg/kg/day, positive control), or water (HFHC only) for another 6 weeks. Our results showed that SBH attenuated the HFHCD-induced body weight gain and fat accumulation in the liver, and improved plasma lipid levels, such as those of triglycerides (TGs), blood total cholesterol (TC), and low-density lipoprotein (LDL-c). SBH and Sim inhibited the inflammation accompanied by obesity via decreasing inflammatory cytokine interleukin (IL)-1β, tumor necrosis factor α (TNFα), and monocyte chemoattractant protein 1 (MCP1). Moreover, SBH downregulated the expression of protein levels of adipogenic-related factors, including peroxisome proliferator-activated receptor γ (PPARγ) and CCAAT/enhancer-binding protein α (C/EBPα), in the liver, adipose, and muscle tissue. The SBH and Sim treatment also significantly upregulated the phosphorylation of AMP-activated protein kinase α (AMPKα) in the liver and hormone-sensitive lipase (HSL) in the adipose tissue. Overall, the effects of SBH on HFHCD-induced obesity were similar to or more potent than those of simvastatin. These results indicated that SBH has great potential as a therapeutic herbal medicine for obesity.
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Morin, Caroline, Eric Rousseau, Pierre U. Blier, and Samuel Fortin. "Effect of docosahexaenoic acid monoacylglyceride on systemic hypertension and cardiovascular dysfunction." American Journal of Physiology-Heart and Circulatory Physiology 309, no. 1 (July 1, 2015): H93—H102. http://dx.doi.org/10.1152/ajpheart.00823.2014.

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ω-3 Fatty acid supplementation has been associated with lower blood pressure. Cardiovascular diseases are also known to be linked directly to an increase in ω-6 and a reduction in ω-3 fatty acid levels in blood circulation and tissues. To determine the effect of docosahexaenoic acid monoglycerides (MAG-DHA) on blood pressure, lipid profiles, and vascular remodeling in rats fed a high-fat/high-carbohydrate (HFHC) diet. Studies were performed in male rats subjected to 8 wk of HFHC diet supplemented or not with 3 g/day MAG-DHA. After 8 wk of daily MAG-DHA treatment, rats in the HFHC + MAG-DHA group had lower arterial blood pressure and heart rate compared with the HFHC group. Moreover, MAG-DHA prevented the increase aortic wall thickness, whereas lipid analysis of aortic tissues revealed an increase in DHA/AA ratio correlated with the production of resolvin D2 and D3 metabolites. Histological analysis revealed that MAG-DHA prevented the development of LVH in the HFHC group. Serum lipid profile analysis further showed a decrease in total cholesterol (TC) and LDL, including very low-density lipoprotein (VLDL) and triglyceride (TG) levels, together with an increase in HDL levels after 8 wk of MAG-DHA treatment compared with the HFHC group. Furthermore, daily MAG-DHA treatment resulted in reduced proinflammatory marker levels such as CRP, IL-6, TNFα, and IL-1β. Altogether, these findings revealed that per os administration of MAG-DHA prevents HFHC-diet induced hypertension and LVH in rats.
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Alake, Sanmi, Winyoo Chowanadisai, John Ice, Dingbo Lin, Edralin Lucas, Brenda Smith, and Karen Wozniak. "Wheatgerm Supplementation Reduces Gut Inflammation and Epithelial Barrier Dysfunction in IL-10 KO Mice Fed Atherogenic Diet." Current Developments in Nutrition 6, Supplement_1 (June 2022): 972. http://dx.doi.org/10.1093/cdn/nzac068.001.

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Abstract Objectives Wheat germ (WG) contains many bioactive compounds with the potential to maintain an anti-inflammatory gut environment. This study investigated the effects of WG supplementation on gut inflammation and integrity in high-fat fed interleukin (IL)-10 KO mice. Methods Eight-wk-old female B6.129P2-Il10tm1Cgn/J (IL-10KO) and C57BL/6 (WT) mice (n = 10/group) were randomly assigned to diets: WT fed a control diet (WTCO; AIN93-M) and IL-10 KO mice fed control (KOCO), high-fat with high-cholesterol (HFHC; 45% fat kcal, 1% cholesterol), or HFHC + 10% WG (HFWG) for 3 m. Disease activity indices (fecal blood, ruffled fur, stool softness, and rectal prolapse) were monitored twice a week. Fecal indole and short chain fatty acids (SCFAs) concentration were assessed at the beginning and end of study. Proinflammatory cytokines were assessed in the serum and ileum. Ileal and colonic protein expression of transcription factors (STAT3, p-STAT3, PPARg, FoxP3, and AhR), tight junction proteins (ZO-1, occludin), and tryptophan catabolizing enzyme (IDO-1) were assessed by immunoblotting. Relative ileal and colonic gene expression of IL-22 and antimicrobial peptides (Reg3b and Reg3g) were assessed using qRT-PCR. P < 0.05 was considered statistically significant. Results WG increased (P = 0.003) colon length compared to the HFHC group. Weight loss (12.2% in HFHC vs WTCO) was not prevented by WG, but disease activity indices were significantly reduced in the WG vs HFHC group. WG also increased fecal indole, total SCFAs and acetate accompanied by an increase in colonic protein expression of PPARg (P < 0.0001) and FoxP3 (P = 0.001). Ileal STAT3 phosphorylation was reduced (P = 0.0076) due to WG supplementation. An increased colon and ileal protein expression of IDO-1 in the HFHS group was reduced by WG, while also increasing the expression of AhR, ZO-1, and occludin. The relative gene expression of the antimicrobial peptides (Reg3b and Reg3g) was increased (P < 0.05) while serum and ileal tissue concentration of the proinflammatory cytokine, IL-17 was reduced (P = 0.0165 and p = 0.0248 respectively) by WG. Conclusions WG modulated changes that are associated with HF-feeding in IL-10 KO mice, and might be a promising regimen for ameliorating the effects of gut inflammation. Funding Sources Oklahoma Agriculture Experiment Station, Jim and Lynn Williams Professorship, and Barbara K. Pass Grant.
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Lim, Sangbin, Hyeran Won, Yeonghwan Kim, Miran Jang, K. R. Jyothi, Youngseol Kim, Paresh Dandona, Joohun Ha, and Sung Soo Kim. "Antioxidant enzymes induced by repeated intake of excess energy in the form of high-fat, high-carbohydrate meals are not sufficient to block oxidative stress in healthy lean individuals." British Journal of Nutrition 106, no. 10 (June 8, 2011): 1544–51. http://dx.doi.org/10.1017/s0007114511002091.

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It has been reported that high-fat, high-carbohydrate (HFHC) meals increase oxidative stress and inflammation. We examined whether repeated intake of excess energy in the form of HFHC meals alters reactive oxygen species (ROS) generation and the expression levels of antioxidant enzymes and mitochondrial proteins in mononuclear cells, and to determine whether this is associated with insulin resistance. We recruited healthy lean individuals (n 10). The individuals were divided into two groups: one group (n 5) ingested 10878·4 kJ/d (2600 kcal/d; 55–70 % carbohydrate, 9·5–16 % fat, 7–20 % protein) recommended by the Dietary Reference Intake for Koreans for 4 d and the other group (n 5) ingested a HFHC meal containing 14 644 kJ/d (3500 kcal/d). Then, measurements of blood insulin and glucose levels, together with suppressor of cytokine signalling-3 (SOCS-3) expression levels, were performed in both groups. Also, cellular and mitochondrial ROS levels as well as malondialdehyde (MDA) levels were measured. Expression levels of cytosolic and mitochondrial antioxidant enzymes, and mitochondrial complex proteins were analysed. Repeated intake of HFHC meals induced an increase in homeostasis model of assessment-insulin resistance (HOMA-IR), together with an increase in SOCS-3 expression levels. While a single intake of the HFHC meal increased cytosolic and mitochondrial ROS, repeated intake of HFHC meals reduced them and increased the levels of MDA, cytosolic and mitochondrial antioxidant enzymes, and several mitochondrial complex proteins. Repeated intake of HFHC meals induced cellular antioxidant mechanisms, which in turn increased lipid peroxidation (MDA) and SOCS-3 expression levels, induced hyperinsulinaemia and increased HOMA-IR, an index of insulin resistance. In conclusion, excess energy added to a diet can generate detrimental effects in a short period.
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Parra-Vargas, Marcela, Ana Sandoval-Rodriguez, Roberto Rodriguez-Echevarria, Jose Dominguez-Rosales, Arturo Santos-Garcia, and Juan Armendariz-Borunda. "Delphinidin Ameliorates Hepatic Triglyceride Accumulation in Human HepG2 Cells, but Not in Diet-Induced Obese Mice." Nutrients 10, no. 8 (August 10, 2018): 1060. http://dx.doi.org/10.3390/nu10081060.

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Anthocyanin consumption is linked to benefits in obesity-related metabolic alterations and non-alcoholic fatty liver disease (NAFLD), though the functional role of delphinidin (Dp) is yet to be established. Therefore, this study examined the effects of Dp on metabolic alterations associated with NAFLD, and molecular mechanisms in HepG2 cells and diet-induced obese mice. Cells incubated with palmitate to induce lipid accumulation, concomitantly treated with Dp, reduced triglyceride accumulation by ~53%, and downregulated gene expression of CPT1A, SREBF1, and FASN without modifying AMP-activated protein kinase (AMPK) levels. C57BL/6Nhsd mice were fed a standard diet (control) or a high-fat/high-carbohydrate diet (HFHC) for 16 weeks. Mice in the HFHC group were subdivided and treated with Dp (HFHC-Dp, 15 mg/kg body weight/day) or a vehicle for four weeks. Dp did not affect body weight, energy intake, hyperglycemia, insulin resistance, or histological abnormalities elicited by the HFHC diet. Furthermore, the messenger RNA (mRNA) expressions of Acaca, and Fasn in hepatic or epididymal adipose tissue, and the hepatic sirtuin 1 (SIRT1)/liver kinase B1 (LKB1)/AMPK and proliferator-activated receptor alpha (PPARα) signaling axis did not significantly change due to the HFHC diet or Dp. In summary, Dp effectively reduced triglyceride accumulation in vitro through the modulation of lipid metabolic gene expression. However, a dose of Dp administrated in mice simulating the total daily anthocyanin intake in humans had no effect on either metabolic alterations or histological abnormalities associated with HFHC diets.
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Dandona, Paresh, Husam Ghanim, Sanaa Abuaysheh, Kelly Green, Manav Batra, Sandeep Dhindsa, Antoine Makdissi, Reema Patel, and Ajay Chaudhuri. "Decreased insulin secretion and incretin concentrations and increased glucagon concentrations after a high-fat meal when compared with a high-fruit and -fiber meal." American Journal of Physiology-Endocrinology and Metabolism 308, no. 3 (February 1, 2015): E185—E191. http://dx.doi.org/10.1152/ajpendo.00275.2014.

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This study was conducted to investigate whether a high-fat/high-carbohydrate (HFHC) meal induces an increase in plasma concentrations of glucagon, dipeptidyl peptidase-IV (DPP-IV), and CD26 expression in mononuclear cells (MNC) while reducing insulin, C-peptide, proinsulin, GIP, and GLP-1 concentrations. Ten healthy normal subjects were given either a 910-calorie HFHC meal or an American Heart Association (AHA) meal rich in fruit and fiber during the first visit and the other meal during the second visit in crossover design. Blood samples were collected at baseline and at 15, 30, 45, 60, 75, 90, 120, 180, and 300 min following the meal. There was a significantly greater increase in glucose concentrations and lower increase in postprandial insulin, C-peptide, and proinsulin concentrations and lower insulin/glucose ratios following the HFHC meal. HFHC meal intake induced marked increases in plasma glucagon and DPP-IV concentrations and an increase in CD26 mRNA expression in MNC compared with the AHA meal. In addition, the HFHC meal induced a reduction in GIP and peak GLP-1 secretion compared with the AHA meal. This was associated with a significantly greater increase in oxidative stress and proinflammatory mediators including, ROS generation, TNFα, and IL-1β mRNA expression and plasma concentrations of TBARS, FFA, and LPS. We conclude that the proinflammatory HFHC meals result in lower insulin, C-peptide, proinsulin, and GIP secretion in association with higher plasma glucagon and DPP-IV concentrations and CD26 expression in MNC compared with the AHA meal.
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Dissertations / Theses on the topic "HFHC"

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Fan, Haibo. "HfC structural foams synthesized from polymer precursors." Auburn, Ala., 2005. http://repo.lib.auburn.edu/2005%20Fall/Dissertation/FAN_HAIBO_30.pdf.

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Wheeler, Mark R. "The adsorption of HFC-134a onto zeolite Na-13X." Thesis, Brunel University, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.307487.

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Neilson, Martin M. "The bulk and surface properties of HFC replacement refrigerants." Thesis, University of Sheffield, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.312801.

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Арсеньєв, В`ячеслав Михайлович, Вячеслав Михайлович Арсеньев, Viacheslav Mykhailovych Arseniev, Валерій Миколайович Марченко, Валерий Николаевич Марченко, Valerii Mykolaiovych Marchenko, Михайло Ігорович Проценко, Михаил Игоревич Проценко, and Mykhailo Ihorovych Protsenko. "Энергоэффективность струйного понижающего термотрансформатора на рабочих веществах HFC - типа." Thesis, Изд-во СумГУ, 2009. http://essuir.sumdu.edu.ua/handle/123456789/6713.

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Narasimhan, Anirudhan. "Commercialization of HFAC Electronic Nerve Block Technology to Treat Chronic Post Surgical Pain." Case Western Reserve University School of Graduate Studies / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=case1290641992.

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Yan, Yu. "Performance optimisation of HFC refrigerants by experimental and mathematical methods." Thesis, University of Strathclyde, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.248796.

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Boisselier, Guilhaume. "Dépôt chimique en phase vapeur de carbures de chrome, de silicium et d'hafnium assisté par injection liquide pulsée." Thesis, Toulouse, INPT, 2013. http://www.theses.fr/2013INPT0064/document.

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Des revêtements céramiques sont obtenus par un procédé de dépôt chimique en phase vapeur assisté par injection liquide pulsée (DLICVD) de précurseurs organométalliques. Des dépôts de carbure de chrome (CrCx) sont élaborés dans un réacteur tubulaire à paroi chaude à partir d’une solution de bis(benzène) chrome dans du toluène pour des températures de 475 °C et sous pression partielle d’azote (pression totale 50 Torr). Une couche d’accroche pouvant être nécessaire pour revêtir des pièces métalliques, tels des aciers et alliages, par un revêtement céramique non-oxyde de type CrCx, des couches de chrome métallique (Cr) et des carbures mixtes Cr-Si-C ont également été élaborées par ce procédé DLICVD. Ainsi, l’ajout d’un additif à base de chlore ou de soufre (par exemple l’hexachlorobenzène ou le thiophénol) dans la solution BBC/toluène permet la déposition de films de chrome métallique (Cr) à 475 °C. De plus, l’utilisation d’une solution de précurseur contenant simultanément du Si et du Cr tel que le tetrakis(trimethylsilylmethyl)chromium dans du toluène mène au dépôt d’un carbure mixte Cr-Si-C pouvant jouer le rôle d’interphase dans des assemblage céramique-métal. Des films de carbure de silicium (SiC) sont obtenus à partir de deux précurseurs (1,3 disilabutane et polysilyléthylène) injectés purs ou en solution également dans du toluène. Les dépôts sont faits dans une gamme de température comprise entre 700 et 800 °C, sous pression partielle d’azote (pression totale 50 Torr). Les films obtenus sont des films amorphes de SiC contenant une faible quantité d’hydrogène (provenant du mécanisme de décomposition des précurseurs) : a-SiC:H. Les films sont stœchiométriques dans le cas de l’injection de précurseur pur, et quasi stœchiométrique lorsque les précurseurs sont dilués dans du toluène. Les films amorphes tels que déposés deviennent nanocristallins en présentant la structure cubique du SiC après recuit sous vide à 1000 °C. L’influence du solvant (toluène) sur la composition, la morphologie et la vitesse de croissance des dépôts est discutée en fonction des systèmes chimiques étudiés et des conditions expérimentales, en particulier les conditions locales dans le réacteur DLICVD telles que les gradients de température et de concentration. Des films de carbure de hafnium (HfC) sont également élaborés par le même procédé à partir d’une solution de bis(cyclopentadiényl)diméthyl hafnium dans du toluène après avoir testé plusieurs précurseurs. Une température de 750 °C est utilisée et l’utilité d’une pression partielle de dihydrogène dans le gaz vecteur azote est démontrée (pression totale 50 Torr, 423 sccm de N2 et 77 sccm de H2). Tels que déposés, ces films sont riches en carbone (C-rich HfCx) et ont une structure quasi-amorphe. Ils deviennent nanocristallins après recuit sous vide à 1000 °C. Enfin, la mise en œuvre de films multicouches céramiques par DLICVD à paroi chaude est mise en évidence par l’élaboration de revêtements multicouches HfC/SiC à 750 °C, sous pression partielle d’un mélange de gaz vecteur N2/H2. Le contrôle du procédé permet une nano structuration de ces revêtements multicouches jusqu’à une bi-période de 100 nm (empilement de 100 couches d’environ 50 nm chacune). La stabilité thermique de ces architectures et des tests préliminaires de résistance à l’oxydation à haute température des films de SiC et HfC/SiC sont discutés
Ceramic coatings are made from metalorganic precursors by a chemical vapour deposition process assisted by pulsed liquid injection (DLICVD). Chromium carbide (CrCx) films are grown in a tubular hot wall reactor from a solution of bis(benzene)chromium in toluene under partial pressure of nitrogen at 475 °C (total pressure set at 50 Torr). Bonding layers are useful on metallic components, such as steels and alloys, with non-oxide ceramic films such as CrCx, to that purpose metallic chromium (Cr) and mixed carbides Cr-Si-C have been made by DLICVD. Furthermore, adding a chlorinated or sulfur based additive (e.g. hexachlorobenzene or thiophenol) in the BBC/toluene solution allows depositing metallic chromium (Cr) at 475 °C. Moreover, using a precursor containing Si and Cr as tetrakis(trimethylsilylmethyl)-chromium in toluene leads to the deposition of Cr-Si-C mixed carbide. Silicon carbide films are made from two precursors (1,3-disilabutane and polysilylethylene) that have been injected either pure or diluted in toluene. A temperature range of 700 to 800 °C has been used under a partial pressure of nitrogen (total pressure of 50 Torr). SiC films are amorphous and contain a small quantity of hydrogen (hydrogen comes from precursor pyrolysis mechanism): a-SiC:H. Films are stoichiometric when pure precursors are injected, and quasi stoichiometric when precursors are diluted in toluene. As deposited coatings are amorphous and become nanocristalline (cubic SiC structure) after annealing at 1000 °C under vacuum. The influences of the solvent (toluene) on the composition, morphology and growth rate are discussed as a function of the chemical system and experimental conditions, in particular reactor gradient conditions such as temperature and precursors concentration in gas phase. Hafnium carbide films are also made using a solution of bis(cyclopentadiényl)diméthyl hafnium in toluene by the same process. Temperature is set to 750 °C and hydrogen partial pressure has been shown useful (total pressure of 50 Torr, 423 sccm of N2 and 77 sccm of H2). As-deposited films are C-rich HfCx and quasi amorphous. They become nanocristalline after annealing at 1000 °C under vacuum. Finally, ceramics multilayer HfC/SiC coatings were deposited by DLICVD at 750 °C under a partial pressure of a mixture of N2/H2. The process allows a good control of the multilayer nanostructure. Thermal stability and high temperature oxidation preliminary tests on SiC and HfC/SiC films are discussed
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Loan, Nguyen Kim, and n/a. "Listening comprehension tests for intermediate students at Hanoi Foreign Languages College." University of Canberra. Education, 1989. http://erl.canberra.edu.au./public/adt-AUC20060818.141820.

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In Vietnam today there is an urgent demand for well-designed tests of listening comprehension. Little attention has been given to this problem. This field study is intended to provide guidance on the design of listening comprehension tests and in particular for intermediate level students at the Hanoi Foreign Language College (HFLC). The Field Study Report consists of six chapters. Chapter One gives a brief introduction which covers the problem, aims, subjects (testees) and the background of the Field Study Report. Chapter Two deals with the purposes of testing in some detail, setting this in the framework of the teaching-testing link, teachers and testing, and students and testing. Test characteristics are considered and the problem of sampling for test content is addressed. Chapter Three concerns test items for listening comprehension. The chapter begins with a short description of listening comprehension and is followed by a survey of theorists on listening comprehension together with the test items for listening that they suggest. Some commonly-used standardised tests and their listening items are discussed. The chapter ends with a checklist of selected listening items suitable for students at HFLC in Vietnam. Chapter Four discusses the designing and trialling of test items for listening comprehension, such as multiple choice, completion of a taped talk, matching pictures with statements etc. The chapter presents the results of the trialling of sample items and also deals with correlations between the sample tests used. Chapter Five deals with test design and development in general. It clarifies the bases for test design and provides a checklist of steps in the development of tests. In addition, the chapter includes a resources inventory for listening test items. Chapter Six presents the conclusions of the Field Study Report.
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Bruna, Paez Eduardo Andrés. "Modelo preventivo de morosidad temprana de clientes HFC mediante clasificación bayesiana." Tesis, Universidad de Chile, 2012. http://www.repositorio.uchile.cl/handle/2250/112522.

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Magíster en Gestión de Operaciones
Este proyecto, formó parte del plan de mitigación de clientes morosos implementado por una empresa de telecomunicaciones en el año 2009, dónde una de las líneas de acción estaba enfocada en disminuir la morosidad de los nuevos clientes en su primera factura. Se propuso un modelo que clasifique a los nuevos clientes en pagadores y no pagadores, permitiendo con ello, reorientar recursos y realizar acciones preventivas de morosidad de manera más focalizada y efectiva, las cuales estaban siendo hasta ese momento aplicadas al universo total de nuevos clientes. El éxito de este proyecto requería el compromiso del área de cobranzas, usuaria del modelo, por esto, la elección del modelo consideró aspectos tanto teóricos como prácticos. La simpleza y la fácil ejecución del modelo, idealmente programable, eran variables deseables y decidoras del éxito de éste. Se ejecutó basado en Clasificación Bayesiana por su forma simple de utilizar y presentar una confiabilidad aceptable [17]. Los métodos de inducción bayesiana han demostrado ser una clase de algoritmos tan competitivos como los métodos árboles de decisión y redes neuronales [29], que permiten implementar algoritmos en Wolfram Mathematica 6.0 cuyas sentencias de programación son muy similares al lenguaje C++, permitiendo su programación posterior. El modelo se confeccionó con 42.087 clientes, contratantes entre el 15 de julio y el 15 de octubre del 2009, de estos, 40.087 formaron la base de aprendizaje para calibrar y realizar los cálculos de probabilidades, y 2.000 como base de testing. Los clientes a clasificar en pagadores y no pagadores correspondieron a 9.328, quienes ingresaron a la empresa entre el 16 de Octubre y el 15 de Noviembre del 2009. En base a establecer una probabilidad a priori, se plantea en valores estimados de corte probabilístico basado en la experiencia o un método de clasificación [19], por una probabilidad de corte de 0,4 para clasificar a un cliente pagador por la necesidad que enfrenta la empresa de mejorar el % de clientes morosos en su primera boleta y a la vez reducir los costos actuales involucrados en la cobranza. El modelo clasificó a 2.910 clientes como no pagadores, 2.179 de ellos efectivamente no cancelaron su boleta al vencimiento (75%). Este resultado es compatible con el esperado en el análisis teórico, debido a la eficiencia de los estimadores estimados, como también, el tamaño de los set de datos empleados que en forma teórica respalda los resultados obtenidos con un 80% de confiabilidad. Como trabajo futuro, resulta interesante evaluar el aporte del modelo en la reducción real del porcentaje de clientes morosos al permitir reorientar recursos y focalizarse en ciertos clientes, como a su vez, actualizar la base de aprendizaje de tal forma ir considerando la actualidad al modelo.
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Chen, De-Kang. "Flashing flow of refrigerant HFC-134a through a diabatic capillary tube." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/nq25924.pdf.

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Books on the topic "HFHC"

1

Anderson, James W. The HFC guide book. [Lexington, KY: HCF Diabetes Foundation], 1987.

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(Firm), ICF Macro, ed. Namibia health facility census (HFC), 2009. Windhoek, Namibia: Ministry of Health and Social Services, 2011.

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Large, David. Broadband cable access networks: The HFC plant. 3rd ed. Boston: Morgan Kaufmann, 2008.

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Residential broadband networks: XDSL, HFC, and fixed wireless access. Upper Saddle River, NJ: Prentice Hall, 1998.

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Moore, Christopher Mark. Fluorine atom reactions and the photo-oxidation of HFC-134a. Birmingham: University of Birmingham, 1996.

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Video dialtone technology: Digital video over ADSL, HFC, FTTC, and ATM. New York: McGraw-Hill, 1995.

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Eckels, Steven J. In-tube evaporation and condensation of HFC-134a and CFC-12 with various lubricant mixtures. Ann Arbor, Mich: UMI Dissertation Services, 2002.

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World, Administrative Radio Conference for the Planning of the HF Bands Allocated to the Broadcasting Service (1987 Geneva Switzerland). Final acts of the World Administrative Radio Conference for the Planning of the HF Bands Allocated to the Broadcasting Service (HFBC-87), Geneva, 1987. Geneva: International Telecommunication Union, 1987.

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Toshiyuki, Kanakubo. Strain Hardening Cement Composites: Structural Design and Performance: State-of-the-Art Report of the RILEM Technical Committee 208-HFC, SC3. Dordrecht: Springer Netherlands, 2013.

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Moran, David Gerard. An investigation of the effects of an ester-based lubricant on the performance of a CFC-12 refridgeration system utilizing HFC 134A. [S.l: The Author], 1994.

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Book chapters on the topic "HFHC"

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Fiorentino, Giuseppe, Maurizia Lanza, Anna Annunziata, and Pasquale Imitazione. "The Role of HFNC." In Covid-19 Airway Management and Ventilation Strategy for Critically Ill Older Patients, 159–65. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-55621-1_17.

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Chawla, Rajesh, and Subhash Todi. "High Flow Nasal Canula (HFNC)." In ICU Protocols, 35–43. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-0898-1_4.

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Ishkov, Alexey, and Vladimir Malikov. "High-Speed HFC-Boriding Kinetics." In XIV International Scientific Conference “INTERAGROMASH 2021”, 3–13. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-80946-1_1.

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Zapata, Daniel, David Wisa, Bushra Mina, and Maciej Walczyszyn. "NPPV vs. HFNC for Acute Respiratory Failure." In Noninvasive Ventilation in Sleep Medicine and Pulmonary Critical Care, 315–23. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-42998-0_32.

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Maginley, Ray. "Patient Care Issues in HFC Emissions Policy." In Non-CO2 Greenhouse Gases: Scientific Understanding, Control and Implementation, 477–83. Dordrecht: Springer Netherlands, 2000. http://dx.doi.org/10.1007/978-94-015-9343-4_73.

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Pikrammenos, Giannis, and Leligou Helen-Catherine. "Performance Evaluation of Diffserv Driven HFC System." In Next Generation Networks. Networks and Services for the Information Society, 137–46. Berlin, Heidelberg: Springer Berlin Heidelberg, 2000. http://dx.doi.org/10.1007/3-540-40019-2_12.

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Fan, Haibo, Nanda K. Ravala, Howard C. Wikle, and Bryan A. Chin. "HfC Structural Foams Synthesizing from Polymer Precursors." In Ceramic Transactions Series, 13–24. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2012. http://dx.doi.org/10.1002/9781118408391.ch2.

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Garcia, Manuel, Daniel F. Garcia, Victor G. Garcia, and Ricardo Bonis. "Traffic Model Characterization of an HFC Network." In Lecture Notes in Computer Science, 539–49. Berlin, Heidelberg: Springer Berlin Heidelberg, 2003. http://dx.doi.org/10.1007/978-3-540-45076-4_54.

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McNaughton, D., C. Evans, and E. G. Robertson. "FT-IR Spectroscopy of the CFC Replacements HFC-152a and HFC-227ea in a Supersonic Jet Expansion." In Progress in Fourier Transform Spectroscopy, 543–46. Vienna: Springer Vienna, 1997. http://dx.doi.org/10.1007/978-3-7091-6840-0_134.

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Macedo, M. M., M. S. Nunes, and H. Duarte-Ramos. "FATHOC — a rate control algorithm for HFC networks." In Broadband Communications, 395–406. Boston, MA: Springer US, 1998. http://dx.doi.org/10.1007/978-0-387-35378-4_31.

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Conference papers on the topic "HFHC"

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Göcebe, D., C. Jansakun, S. Tuma-Kellner, S. Staffer, U. Merle, and W. Chamulitrat. "Macrophage-specific Fatp4 deletion exacerbates HFHC-induced NASH via a shift towards M2 polarization." In 37. Jahrestagung der Deutschen Arbeitsgemeinschaft zum Studium der Leber. Georg Thieme Verlag KG, 2021. http://dx.doi.org/10.1055/s-0040-1722031.

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Solehah, Novia Zuriatun, Adi Prayitno, and Eti Poncorini Pamungkasari. "The Effects of High Fat High Carbohydrate (HFHC) Diet on Body Weight in Overweight Sprague Dawley Rats." In International Conference on Social Determinants of Health. SCITEPRESS - Science and Technology Publications, 2021. http://dx.doi.org/10.5220/0010760400003235.

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Nakayama, Masashi, Haruo Sato, Yutaka Sugita, Seiji Ito, Masashi Minamide, and Yoshito Kitagawa. "Low Alkaline Cement Used in the Construction of a Gallery in the Horonobe Underground Research Laboratory." In ASME 2010 13th International Conference on Environmental Remediation and Radioactive Waste Management. ASMEDC, 2010. http://dx.doi.org/10.1115/icem2010-40038.

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In Japan, any high level radioactive waste (HLW) repository is to be constructed at over 300 m depth below surface. Tunnel support is used for safety during the construction and operation, and shotcrete and concrete lining are used as the tunnel support. Concrete is a composite material comprised of aggregate, cement and various admixtures. Low alkaline cement has been developed for the long term stability of the barrier systems whose performance could be negatively affected by highly alkaline conditions arising due to cement used in a repository. Japan Atomic Energy Agency (JAEA) has developed a low alkaline cement, named as HFSC (Highly Fly-ash Contained Silicafume Cement), containing over 60 wt% of silica-fume (SF) and fly-ash (FA). HFSC was used experimentally as the shotcrete material in construction of part of the 140m deep gallery in the Horonobe Underground Research Laboratory (URL). The objective of this experiment was to assess the performance of HFSC shotcrete in terms of mechanics, workability, durability, and so on. HFSC used in this experiment is composed of 40 wt% OPC (Ordinary Portland Cement), 20 wt% SF, and 40 wt% FA. This composition was determined based on mechanical testing of various mixes of the above components. Because of the low OPC content, the strength of HFSC tends to be lower than that of OPC. The total length of tunnel using HFSC shotcrete is about 73 m and about 500 m3 of HFSC was used. The workability of HFSC shotcrete was confirmed in this experimental construction.
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Nilpueng, Kitti, and Somchai Wongwises. "Flashing Flow Mechanisms of HFC-134a and HFC-410a Through Short-Tube Orifices." In ASME/JSME 2011 8th Thermal Engineering Joint Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/ajtec2011-44258.

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In this study, the flow mechanisms of HFC-134a and HFC-410A, including flow pattern, pressure distribution, temperature distribution, and mass flow rate inside short-tube orifice are presented and compared under the same working temperature. The test runs are performed at condenser temperature ranging between 35 and 45°C, evaporator temperature ranging between 2 and 12°C, and degree of subcooling ranging between 1 and 12 °C. The results show that the temperature distribution along the short-tube orifice obtained from HFC-410A is slightly higher than that obtained from HFC-134a. On the other hand, the pressure distribution between both refrigerants shows the large difference. It is also found that the tendency of mass flow rate obtained from HFC-134a almost coincides with those obtained HFC-410A as the operating conditions and short-tube orifice size are varied. However, the average mass flow rate of HFC-134a is slightly lower than that of HFC-410A.
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"Short Course High Frequency Design For Communications." In Short Course High Frequency Design for Communications. IEEE, 1996. http://dx.doi.org/10.1109/hfdc.1996.864089.

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Larson, L. "DBS, VSAT, and the future." In Short Course High Frequency Design for Communications. IEEE, 1996. http://dx.doi.org/10.1109/hfdc.1996.864094.

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Karunathilaka, R. W. I. S., H. Mallawaarachchi, and R. M. D. I. M. Rathnayake. "HYDROFLUOROCARBON (HFC) MANAGEMENT FRAMEWORK FOR LOW CARBON INDUSTRIAL FACILITIES: MILK PROCESSING INDUSTRY IN SRI LANKA." In The 9th World Construction Symposium 2021. The Ceylon Institute of Builders - Sri Lanka, 2021. http://dx.doi.org/10.31705/wcs.2021.29.

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Milk processing industry consumes hydrofluorocarbon (HFC) at a great extent. Emission of HFC distresses the food security, water security and the future of healthy living beings. Thus, the purpose of this paper is to propose strategies to improve the HFC management practices in Sri Lankan milk processing industry. Case study method was involved under qualitative phenomenon. Thus, three case studies were selected based on the HFC handling process. Nine milk processing agencies representing three importers and distributors, three milk processors and three service providers were selected to collect the data. Case analysis technique was used for data analysis. Findings revealed that, lack of institutional and national level procedures, unstable governmental policies, and lack of technology have increased the unhealthy handling of HFC in milk processing industry in Sri Lanka. Initiating a national level mechanism for governing HFC importers and service providers, empowering inventers for creating sustainable applications over HFC use and improving awareness were identified as key strategies to eliminate the identified issues under organisational and national level. Accordingly, a framework was proposed, which provides a platform to investigate the status of HFC handling procedure of milk processing industry in Sri Lanka. Since there is a lack of national level concern on managing HFC use in milk processing industry, having a formal framework at national level to govern both national and institutional level procedures was determined as a vital step forward to be considered.
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Dalkilic¸, Ahmet Selim, and Somchai Wongwises. "Comparison of Various Alternative Refrigerants for Vapour Compression Refrigeration Systems." In ASME/JSME 2011 8th Thermal Engineering Joint Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/ajtec2011-44267.

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Single-stage vapour compression refrigeration system was compared with an actual vapour compression cycle, single-stage process with internal heat exchanger, and a two-stage process with economiser using the refrigerants of HCFC-22, CFC-502 and their alternatives such as HFC-134a, HFC-32, HFC-152a, HFC-404A, HFC-407C, HFC-507, HFC-410A. A theoretical performance study on a cascade refrigeration system was performed using two refrigeration cycles connected through the heat exchanger in the middle working as the evaporator for the high pressurized cycle and condenser for the low pressurized cycle. Other performance study was performed using a two-stage cascade refrigeration system having low and high pressure compressors connected through the mixing chamber in the middle. The condensation temperatures were between 30 and 50 °C, evaporation temperatures were between −50 °C and 5 °C and heat exchanger and economiser temperatures were kept as constant for the comparisons. Some of the alternative refrigerants’ coefficients of performance values are found to be higher than their base traditional pure refrigerants. The effects of the main parameters of performance analysis such as refrigerant type, degree of subcooling, and superheating on the performance coefficient, refrigerant charge rate and volumetric refrigeration capacity are investigated for various operating conditions as case studies.
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Wielgat, Robert, Tomasz P. Zielinski, Tomasz Potempa, Agnieszka Lisowska-Lis, and Daniel Krol. "HFCC based recognition of bird species." In 2007 Signal Processing Algorithms, Architectures, Arrangements, and Applications (SPA 2007). IEEE, 2007. http://dx.doi.org/10.1109/spa.2007.5903313.

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Lee, K. A., Y. M. Jin, and J. H. Ahn. "Effect of Carbide Type on the Properties of Low Vacuum Plasma Sprayed W-Based Composite Coating Layer." In ITSC2010, edited by B. R. Marple, A. Agarwal, M. M. Hyland, Y. C. Lau, C. J. Li, R. S. Lima, and G. Montavon. DVS Media GmbH, 2010. http://dx.doi.org/10.31399/asm.cp.itsc2010p0895.

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Abstract The PAS method was used to produce W-ZrC and W-HfC composite powder, and the LVPS process technologies were used to create W composite coating layers. In addition, the mechanical properties, high-temperature resistance, and ablation characteristics of the W composite coatings were compared and analyzed for different types of carbides. For comparison and analysis, Vickers hardness, porosity, and adhesive strength were measured, and plasma torch tests were conducted. The use of the LVPS technologies led to successful production of W composite coatings (W-HfC; W-ZrC), approximately 1,000 μm or above in thickness. ZrC particles were observed in the layers of W-ZrC coating. The porosity was 3.59 % in W-HfC and 7.74 % in W-ZrC, indicating the W-HfC coating had a better pore quality than W-ZrC. Vickers hardness was approximately 120Hv higher in W-ZrC than in W-HfC due to the presence of ZrC particles in the W-ZrC coating. Adhesive strength was found to be nearly identical in both coatings. Results of the evaluation of high thermal resistance characteristics of the W composite coating materials showed that W-ZrC coating performed better in resisting high thermal conditions than W-HfC coating, due to the strengthening effects of ZrC particles in the layers and the generation of ZrO2 phase with high levels of stability in high temperatures.
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Reports on the topic "HFHC"

1

Gutierrez-Arias, Ruvistay, Gabriel Salgado-Maldonado, Viviana Vidal Ojeda, Paola Letelier Valdivia, Francisco Salinas-Barahona, Carmen Echeverría-Valdebenito, and Pamela Seron. Frequency and assessment of swallowing disorders in adults on high-flow nasal cannula in critical and non-critical care settings. A scoping review protocol. INPLASY - International Platform of Registered Systematic Review and Meta-analysis Protocols, November 2022. http://dx.doi.org/10.37766/inplasy2022.11.0078.

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Review question / Objective: i) What are the characteristics of the population undergoing high-flow nasal cannula (HFNC) in which swallowing disorders have been assessed? ii) What has been the programming used in HFNC when assessing swallowing disorders? iii) What assessment tools or scales have been used to assess swallowing disorders in adults undergoing HFNC? Background: HFNC has become a widely used respiratory support system, which has been shown to have positive effects in different populations. While facilitation of oral communication and feeding have been described as advantages, swallowing disorders have been postulated as potential complications.
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Sanguanwong, Natthawan, Nattawat Jantarangsi, Natthida Owattanapanich, and Vorakamol Phoophiboon. Effect of non-invasive ventilation and high flow nasal cannula on interstitial lung disease with acute respiratory failure: A systematic review and meta-analysis. INPLASY - International Platform of Registered Systematic Review and Meta-analysis Protocols, June 2022. http://dx.doi.org/10.37766/inplasy2022.6.0104.

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Review question / Objective: P: Interstitial lung disease patient who is suffering with acute respiratory failure. I: Non-invasive oxygen therapy either non-invasive ventilation (NIV) or high flow nasal cannula (HFNC). C: 1. Conventional oxygen therapy, 2. NIV vs HFNC. O: P/F ratio improvement, PaCO2 reduction, mortality, intubation rate. Condition being studied: The benefit of using either non-invasive ventilation or high flow nasal cannula on interstitial lung disease with acute respiratory failure.
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Haynes, W. M. Thermophysical properties of HFC-143a and HFC-152a. Quarterly report, 1 January--31 March 1994. Office of Scientific and Technical Information (OSTI), April 1994. http://dx.doi.org/10.2172/10147087.

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Haynes, W. M. Thermophysical properties of HFC-143a and HFC-152a. Quarterly report, 1 July 1993--30 September 1993. Office of Scientific and Technical Information (OSTI), October 1993. http://dx.doi.org/10.2172/10108097.

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Haynes, W. M. Thermophysical properties of HFC-143a and HFC-152a. Quarterly report, October 1, 1993--December 31, 1993. Office of Scientific and Technical Information (OSTI), January 1994. http://dx.doi.org/10.2172/10142930.

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Kayser, R. F. Thermophysical properties of HFC-143a and HFC-152a. Quarterly report, 1 April 1993--30 June 1993. Office of Scientific and Technical Information (OSTI), July 1993. http://dx.doi.org/10.2172/10143468.

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Haynes, W. M. Thermophysical properties of HFC-143a and HFC-152a. Final report, April 1, 1993--June 30, 1994. Office of Scientific and Technical Information (OSTI), July 1994. http://dx.doi.org/10.2172/10191933.

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Domanski, Piotr A., Mark O. McLinden, Ian H. Bell, and Gregory T. Linteris. Low-GWP alternative refrigerant blends for HFC-134a. Gaithersburg, MD: National Institute of Standards and Technology, September 2018. http://dx.doi.org/10.6028/nist.tn.2014.

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Goetzler, W., L. Bendixen, and P. Bartholomew. Risk assessment of HFC-32 and HFC-32/134a (30/70 wt.%) in split system residential heat pumps. Final report. Office of Scientific and Technical Information (OSTI), April 1998. http://dx.doi.org/10.2172/607494.

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Bennett, M. V., and J. M. Bennett. Aircraft Engine/APU Fire Extinguishing System Design Model (HFC-125). Fort Belvoir, VA: Defense Technical Information Center, May 1997. http://dx.doi.org/10.21236/ada373212.

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