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Somsiri Decharat - One of the best experts on this subject based on the ideXlab platform.

  • Urinary Hippuric Acid and Toluene Levels in Workers of Printing Factories in Thailand
    International journal of occupational hygiene, 2016
    Co-Authors: Somsiri Decharat
    Abstract:

    The aims of this study were to determine Hippuric Acid and toluene in urine samples, airborne toluene levels, health effects, and to describe any correlation between specimen samples. Seventy-five printing workers exposed to toluene at work (exposed group), and 60 nonexposed people (control group) were studied. Study participants were selected from same factories in the different positions. Urine samples were collected at the end of a shift and analyzed for Hippuric Acid, toluene in urine, and airborne toluene by using Gas Chromatograph (GC). The median of the 75 airborne toluene levels was 11.16 ppm (range, 3.72-68.83 ppm). The median of the urinary Hippuric Acid level was 200 mg/g creatinine (range, 78-1870 mg/g creatinine), and toluene in urine was 13 µg/L (range, 11-58 µg/L). A statistically significant positive correlation was found among airborne toluene exposure, Hippuric Acid levels, and urinary toluene levels (r= 0.713, P

  • Hippuric Acid Levels in Paint Workers at Steel Furniture Manufacturers in Thailand
    Safety and health at work, 2014
    Co-Authors: Somsiri Decharat
    Abstract:

    Background: The aims of this study were to determine Hippuric Acid levels in urine samples, airborne toluene levels, acute and chronic neurological symptoms, and to describe any correlation between urinary Hippuric Acid and airborne toluene. Methods: The Hippuric Acid concentration in the urine of 87 paint workers exposed to toluene at work (exposed group), and 87 nonexposed people (control group) was studied. Study participants were selected from similar factories in the same region. Urine samples were collected at the end of a shift and analyzed for Hippuric Acid by high performance liquid chromatography. Air samples for the estimation of toluene exposure were collected with diffusive personal samplers and the toluene quantified using gaseliquid chromatography. The two groups were also interviewed and observed about their work practices and health. Results: The median of the 87 airborne toluene levels was 55 ppm (range, 12e198 ppm). The median urinary Hippuric Acid level was 800 mg/g creatinine (range, 90e2547 mg/g creatinine). A statistically significant positive correlation was found between airborne toluene exposure and urine Hippuric Acid levels (r ¼ 0.548, p < 0.01). Workers with acute symptoms had significantly higher Hippuric Acid levels than those who did not (p < 0.05). It was concluded that there was a significant correlation between toluene exposure, Hippuric Acid levels, and health (p < 0.001). Conclusion: There appears to be a significant correlation between workers exposure to toluene at work, their urine Hippuric Acid levels, and resulting symptoms of poor health. Improvements in working conditions and occupational health education are required at these workplaces. There was good correlation between urinary Hippuric Acid and airborne toluene levels.

Andrea Trevisan - One of the best experts on this subject based on the ideXlab platform.

  • Reliability of Urinary Excretion Rate Adjustment in Measurements of Hippuric Acid in Urine
    International Journal of Environmental Research and Public Health, 2014
    Co-Authors: Annamaria Nicolli, Giovanni Battista Bartolucci, Federica Chiara, Alberto Gambalunga, Mariella Carrieri, Andrea Trevisan
    Abstract:

    The urinary excretion rate is calculated based on short-term, defined time sample collections with a known sample mass, and this measurement can be used to remove the variability in urine concentrations due to urine dilution. Adjustment to the urinary excretion rate of Hippuric Acid was evaluated in 31 healthy volunteers (14 males and 17 females). Urine was collected as short-term or spot samples and tested for specific gravity, creatinine and Hippuric Acid. Hippuric Acid values were unadjusted or adjusted to measurements of specific gravity, creatinine or urinary excretion rate. Hippuric Acid levels were partially independent of urinary volume and urinary flow rate, in contrast to specific gravity and creatinine, which were both highly dependent on the Hippuric Acid level. Accordingly, Hippuric Acid was independent on urinary specific gravity and creatinine excretion. Unadjusted and adjusted values for specific gravity or creatinine were generally closely correlated, especially in spot samples. Values adjusted to the urinary excretion rate appeared well correlated to those unadjusted and adjusted to specific gravity or creatinine values. Thus, adjustment of crude Hippuric Acid values to the urinary excretion rate is a valid procedure but is difficult to apply in the field of occupational medicine and does not improve the information derived from values determined in spot urine samples, either unadjusted or adjusted to specific gravity and creatinine.

Ellen Kienzle - One of the best experts on this subject based on the ideXlab platform.

  • renal energy excretion of horses depends on renal Hippuric Acid and nitrogen excretion
    Journal of Animal Physiology and Animal Nutrition, 2018
    Co-Authors: B Hipp, Karlheinz Sudekum, Annette Zeyner, G Goren, Ellen Kienzle
    Abstract:

    The prediction of renal energy excretion is crucial in a metabolizable energy system for horses. Phenolic Acids from forage cell walls may affect renal energy losses by increasing Hippuric Acid excretion. Therefore, the relationships were investigated between renal energy, nitrogen (N) and Hippuric Acid excretion of four adult ponies (230-384 kg body weight (BW)) consuming diets based on fresh grass, grass silage, grass cobs (heat-dried, finely chopped, pressed grass), alfalfa hay, straw, extruded straw and soybean meal. Feed intake was measured; urine and faeces were quantitatively collected for three days. Feed was analysed for crude nutrients, gross energy, amino Acids and neutral-detergent-insoluble crude protein (CP); faeces were analysed for crude nutrients and cross energy; urine was analysed for N, Hippuric Acid, creatinine and gross energy. Renal energy excretion (y; kJ/kg BW0.75 ) correlated with renal N excretion (x1 ; g/kg BW0.75 ) and renal Hippuric Acid excretion (x2 ; g/kg BW0.75 ): y = 14.4 + 30.2x1 +20.7x2 (r = .95; n = 30; p < .05). Renal Hippuric Acid excretion was highest after intake of fresh grass and lowest after intake of soybean meal. The ratio of Hippuric Acid to creatinine in urine and the excretion of Hippuric Acid per gram of dry matter intake was significantly higher for fresh grass than for all other rations. There was no relationship between aromatic amino Acid intake and renal Hippuric Acid excretion. The results of the present study and literature data suggest that feed can be categorized into four groups with regard to the energy losses per gram CP intake: (i) protein supplements (e.g., soybean meal): 4.2-4.9 kJ/g CP intake (ii) alfalfa hay, grains, dried sugar beet pulp: 6.4 kJ/g CP intake, (iii) hay, preserved grass products, straw: 5.2-12.3 kJ/g CP intake (mean 8) and (iv) fresh grass. For group (iii) a negative relationship was observed between renal energy losses per gram of CP and the content of CP or neutral-detergent-insoluble CP in dry matter.

  • Renal energy excretion of horses depends on renal Hippuric Acid and nitrogen excretion
    Journal of animal physiology and animal nutrition, 2017
    Co-Authors: B Hipp, Karlheinz Sudekum, Annette Zeyner, G Goren, Ellen Kienzle
    Abstract:

    The prediction of renal energy excretion is crucial in a metabolizable energy system for horses. Phenolic Acids from forage cell walls may affect renal energy losses by increasing Hippuric Acid excretion. Therefore, the relationships were investigated between renal energy, nitrogen (N) and Hippuric Acid excretion of four adult ponies (230-384 kg body weight (BW)) consuming diets based on fresh grass, grass silage, grass cobs (heat-dried, finely chopped, pressed grass), alfalfa hay, straw, extruded straw and soybean meal. Feed intake was measured; urine and faeces were quantitatively collected for three days. Feed was analysed for crude nutrients, gross energy, amino Acids and neutral-detergent-insoluble crude protein (CP); faeces were analysed for crude nutrients and cross energy; urine was analysed for N, Hippuric Acid, creatinine and gross energy. Renal energy excretion (y; kJ/kg BW0.75 ) correlated with renal N excretion (x1 ; g/kg BW0.75 ) and renal Hippuric Acid excretion (x2 ; g/kg BW0.75 ): y = 14.4 + 30.2x1 +20.7x2 (r = .95; n = 30; p 

Annamaria Nicolli - One of the best experts on this subject based on the ideXlab platform.

  • Reliability of Urinary Excretion Rate Adjustment in Measurements of Hippuric Acid in Urine
    International Journal of Environmental Research and Public Health, 2014
    Co-Authors: Annamaria Nicolli, Giovanni Battista Bartolucci, Federica Chiara, Alberto Gambalunga, Mariella Carrieri, Andrea Trevisan
    Abstract:

    The urinary excretion rate is calculated based on short-term, defined time sample collections with a known sample mass, and this measurement can be used to remove the variability in urine concentrations due to urine dilution. Adjustment to the urinary excretion rate of Hippuric Acid was evaluated in 31 healthy volunteers (14 males and 17 females). Urine was collected as short-term or spot samples and tested for specific gravity, creatinine and Hippuric Acid. Hippuric Acid values were unadjusted or adjusted to measurements of specific gravity, creatinine or urinary excretion rate. Hippuric Acid levels were partially independent of urinary volume and urinary flow rate, in contrast to specific gravity and creatinine, which were both highly dependent on the Hippuric Acid level. Accordingly, Hippuric Acid was independent on urinary specific gravity and creatinine excretion. Unadjusted and adjusted values for specific gravity or creatinine were generally closely correlated, especially in spot samples. Values adjusted to the urinary excretion rate appeared well correlated to those unadjusted and adjusted to specific gravity or creatinine values. Thus, adjustment of crude Hippuric Acid values to the urinary excretion rate is a valid procedure but is difficult to apply in the field of occupational medicine and does not improve the information derived from values determined in spot urine samples, either unadjusted or adjusted to specific gravity and creatinine.

B Hipp - One of the best experts on this subject based on the ideXlab platform.

  • renal energy excretion of horses depends on renal Hippuric Acid and nitrogen excretion
    Journal of Animal Physiology and Animal Nutrition, 2018
    Co-Authors: B Hipp, Karlheinz Sudekum, Annette Zeyner, G Goren, Ellen Kienzle
    Abstract:

    The prediction of renal energy excretion is crucial in a metabolizable energy system for horses. Phenolic Acids from forage cell walls may affect renal energy losses by increasing Hippuric Acid excretion. Therefore, the relationships were investigated between renal energy, nitrogen (N) and Hippuric Acid excretion of four adult ponies (230-384 kg body weight (BW)) consuming diets based on fresh grass, grass silage, grass cobs (heat-dried, finely chopped, pressed grass), alfalfa hay, straw, extruded straw and soybean meal. Feed intake was measured; urine and faeces were quantitatively collected for three days. Feed was analysed for crude nutrients, gross energy, amino Acids and neutral-detergent-insoluble crude protein (CP); faeces were analysed for crude nutrients and cross energy; urine was analysed for N, Hippuric Acid, creatinine and gross energy. Renal energy excretion (y; kJ/kg BW0.75 ) correlated with renal N excretion (x1 ; g/kg BW0.75 ) and renal Hippuric Acid excretion (x2 ; g/kg BW0.75 ): y = 14.4 + 30.2x1 +20.7x2 (r = .95; n = 30; p < .05). Renal Hippuric Acid excretion was highest after intake of fresh grass and lowest after intake of soybean meal. The ratio of Hippuric Acid to creatinine in urine and the excretion of Hippuric Acid per gram of dry matter intake was significantly higher for fresh grass than for all other rations. There was no relationship between aromatic amino Acid intake and renal Hippuric Acid excretion. The results of the present study and literature data suggest that feed can be categorized into four groups with regard to the energy losses per gram CP intake: (i) protein supplements (e.g., soybean meal): 4.2-4.9 kJ/g CP intake (ii) alfalfa hay, grains, dried sugar beet pulp: 6.4 kJ/g CP intake, (iii) hay, preserved grass products, straw: 5.2-12.3 kJ/g CP intake (mean 8) and (iv) fresh grass. For group (iii) a negative relationship was observed between renal energy losses per gram of CP and the content of CP or neutral-detergent-insoluble CP in dry matter.

  • Renal energy excretion of horses depends on renal Hippuric Acid and nitrogen excretion
    Journal of animal physiology and animal nutrition, 2017
    Co-Authors: B Hipp, Karlheinz Sudekum, Annette Zeyner, G Goren, Ellen Kienzle
    Abstract:

    The prediction of renal energy excretion is crucial in a metabolizable energy system for horses. Phenolic Acids from forage cell walls may affect renal energy losses by increasing Hippuric Acid excretion. Therefore, the relationships were investigated between renal energy, nitrogen (N) and Hippuric Acid excretion of four adult ponies (230-384 kg body weight (BW)) consuming diets based on fresh grass, grass silage, grass cobs (heat-dried, finely chopped, pressed grass), alfalfa hay, straw, extruded straw and soybean meal. Feed intake was measured; urine and faeces were quantitatively collected for three days. Feed was analysed for crude nutrients, gross energy, amino Acids and neutral-detergent-insoluble crude protein (CP); faeces were analysed for crude nutrients and cross energy; urine was analysed for N, Hippuric Acid, creatinine and gross energy. Renal energy excretion (y; kJ/kg BW0.75 ) correlated with renal N excretion (x1 ; g/kg BW0.75 ) and renal Hippuric Acid excretion (x2 ; g/kg BW0.75 ): y = 14.4 + 30.2x1 +20.7x2 (r = .95; n = 30; p