• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 353
  • 205
  • 60
  • 27
  • 16
  • 13
  • 8
  • 7
  • 6
  • 5
  • 4
  • 4
  • 4
  • 4
  • 4
  • Tagged with
  • 851
  • 186
  • 116
  • 100
  • 82
  • 73
  • 62
  • 57
  • 49
  • 47
  • 44
  • 39
  • 34
  • 34
  • 31
  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
391

Pre-exercise carbohydrate supplementation effects on intermittent critical velocity, anaerobic running capacity, and critical rest intervals

Bialecki, Adam 29 August 2017 (has links)
No description available.
392

Development of synthetic carbohydrates for capturing toxins

Lewallen, Daniel M. January 2010 (has links)
No description available.
393

Slowly Digesting Starch Attenuates Oxidative Stress in a First Meal but Has No Effect on a Standardized Second Meal

Knutson, Michael J. 11 September 2012 (has links)
No description available.
394

Experimental and Theoretical Studies of: Methyl 4a-carba-D-arabinofuranosides and 2,3-Anydrosugars in Glycoside Bond Synthesis

Callam, Christopher Stephen 31 March 2003 (has links)
No description available.
395

DNA-binding carbohydrates for coordination to a photoactive dirhodium complex and molecular dynamics studies of methyl furanosides: evaluation of available force fields

Rhoad, Jonathan S. January 2004 (has links)
No description available.
396

Effects of aerobic exercise and weight reduction on carbohydrate metabolism during submaximal exercise in sedentary, overweight women

Toepfer, Janine M. January 1984 (has links)
Hormonal and metabolic responses to submaximal exercise were studied in 11 sedentary, overweight women who participated in an 8 week aerobic exercise program (80% VO2 max) while consuming a hypocaloric diet. A maximal and submaximal treadmill exercise test were performed before and after the program. During the submaximal exercise test, a graded portion (mean time 6.4 min) preceded the submaximal phase during which subjects worked at 80% VO2 max until exhaustion (mean time l2 min). Blood was sampled before and after the work via venipuncture. Whole blood was immediately analyzed for lactate accumulation. The remaining blood was centrifuged, separated, and frozen for subsequent serum glucose, cortisol, and insulin measurement. There was a significant increase in oxygen uptake (ml/kg/min), and a decrease in body weight, ( 6.7%), and body fat (14%). Resting heart rate was significantly lower post-training (5.4%), as were exercise RQ (VCO2/VO2) ratios. Pretraining serum glucose and blood lactate significantly increased while nonsignificant decreases were noted in insulin and cortisol as a result of the submaximal exercise bout. The significant increases in glucose and lactate during exercise were blunted after the training program. However, only the post-training response of lactate was significantly different from the pretraining response. The insulin and cortisol response was not significantly different from that during the pretraining exercise test. A correlation was observed between RPE and lactate at the end of exercise both pretraining and post-training. In summary, the combined exercise and weight loss program resulted in exercise being less stressful, both metabolically and subjectively. This improvement enables greater exercise intensity to be performed prior to the significant accumulation of lactate and perception of fatigue which may inspire the sedentary, overweight female to establish and/or continue a regular exercise program. / Master of Science
397

Factors Influencing Sugar Feeding in Invasive Mosquitoes

Upshur, Irving Forde 08 June 2020 (has links)
Phytophagy (i.e., feeding on plant-derived materials) is an essential component of mosquito biology. Yet, it has been historically neglected as most research effort has been concentrated on host-seeking behavior and pathogen transmission. As mosquitoes are the deadliest animals on earth and because challenges, such as the rise of insecticide resistance, arise, there is an urgent need for developing effective and ecologically friendly disease vector control strategies. It is therefore important to deepen our understanding of mosquito phytophagy and, consequently, its potential to develop novel vector control methods. Particular major disease vectors are Ae. aegypti and Ae. albopictus, which are spreading rapidly through the US, in part due to climate change. Herein, we first examine the effect of temperature on Ae. aegypti sugar-feeding behavior as well as overall locomotive activity and survival, using total carbohydrate assays and actometer experiments. An optimum temperature range for mosquito activity is proposed and discussed in the context of global warming. We then observe the tentative benefit provided by city-planted ornamental flowers to Ae. aegypti and Ae. albopictus living in heavily-populated, urban areas. Mosquito sugar-feeding activity and, subsequently, sugar consumption were tested for eleven commonly-planted ornamentals. Additionally, scents were collected from the headspace of each ornamental, and volatile composition was analyzed and discussed as potential cues that could mediate mosquito-plant interactions. / Master of Science in Life Sciences / Sugar-feeding is an important, but generally neglected, aspect of mosquito biology, affecting, for example, their survival, metabolism, and ability to lay eggs. While females need blood to mature their eggs, males feed exclusively on sugar, further highlighting the importance of this food source. Mosquitoes use several cues to locate flowers to feed on, including the plant scent. Aedes aegypti and Aedes albopictus are two urban species that are invasive to the US and are the vectors of several deadly pathogens including dengue, Zika and chikungunya. It is thus to study any aspect of their biology that could lead to the development of new tools to limit their propagation. Because of the nutrients provided to mosquitoes by flowering plant species, considering the dynamic ecological relationship between human, plant, and mosquito in urban, heavily populated areas is critical. Additionally, how temperature is mediating each of these interactions is important to understand and keep in consideration. Here, we first examine the effect of temperature on sugar-feeding, activity and survival in Ae. aegypti, and discuss our results in the context of potential changes in temperature caused by climate change. We also provide some insights on the role that ornamental flower species play in urban areas in the ability of these mosquito species to thrive, by attracting mosquitoes to areas where they will have access to a high number of human blood meals.
398

Respiration rates and Factors which Influence the levels of Carbohydrates and Lipids in Honey Bee Eggs (<I>Apis mellifera </I>Linnaeus)

Mackasmiel, Lucas Aloyse Mugah 21 May 1999 (has links)
Respiration rates and changes in the amount of nutrients in queen-laid and worker-laid eggs of the honey bee, <I>Apis mellifera</I> L., were determined for the 3 days of embryonic development. Respiration was quantified by measuring the amount of CO₂ produced during 13 hr of artificial incubation at four temperature treatments: 28°C, 31°C, 34°C, 36°C (± 0.5°C). The amounts of lipids and carbohydrates were also quantified in the eggs of queens and laying workers on day 1, 2 and 3 using high performance thin layer chromatography. The mean respiration rate for fertilized and unfertilized eggs from queens was 0.1 ± 0.0 µL CO₂/hr/egg, the same as the mean respiration rate obtained for unfertilized eggs from laying workers. The results of carbohydrate analysis showed a total of 2.4 ± 0.6 µg/egg total sugars in the fertilized eggs of queens, an equivalent of 8.3% on a dry weight basis, while unfertilized eggs contained a total of 1.4 ± 0.4 µg/egg total sugars, equivalent of 6.3% on a dry weight basis. Total lipids, excluding fatty acids, were 10.7 ± 6.1 µg/egg (37.4%) for fertilized eggs and 8.4 ± 1.3 µg/egg (40.8%) for unfertilized eggs. The respiration rate at 34°C was 0.17 ± 0.01 µL CO<sub>2</sub>/hr/egg on day 1, the same as day 1 at 36°C. Day 2 respiration rates were 0.13 ± 0.04 µL CO₂/hr/egg and 0.15 ± 0.01 µL CO₂/hr/egg, respectively. On day three, 0.22 ± 0.01 µL CO₂/hr/egg was recorded at 34°C and 0.24 0.01 µL CO₂/hr/egg at 36°C. At low temperatures of 28°C and 31°C, a respiration rate of 0.12 ± 0.01 µL CO₂/hr/egg was recorded on day 1, for eggs held at both temperatures. Day 2 results were 0.07 ± 0.01 µL CO₂/hr/egg at 28°C and 0.11 ± 0.01 µL CO₂/hr/egg at 31°C, while 0.07 ± 0.01 and 0.12 ± 0.01 µL CO₂/hr/egg, respectively, were measured on day 3. Mortality results, as indicated by pre-emergence embryos, showed that 75% developed at 34°C compared to 37.5% at 36°C. Low temperatures of 28°C had 12.5% developing to pre-emergence stage while 50% developed at 31°C. Respiratory results showed significant differences (p=0.05) between the different days of incubation and temperature treatments, respectively. No significant difference was observed between the fertilized eggs and unfertilized eggs from queens at the same temperature treatment. The comparison of unfertilized eggs from queens and those from laying workers also showed no significant difference. The regression (R²=0.65) was significant (P=0.05) when CO₂ output on all the days and temperature treatments were compared. The amount of nutrients in the eggs of queens and those of laying workers, were significantly different (P=0.05) depending on egg type and age. No significant difference was observed between the colonies headed by queens or those of laying workers. Although the queen-laid eggs showed a relatively higher mean value for carbohydrates than worker-laid eggs, the reverse was the case for lipids. On comparing the amount of nutrients per unit weight for queen-laid and worker-laid eggs, no significant differences were observed. From the results obtained, inferences were made about the natural differences between the eggs from queens, and those produced by laying workers. / Master of Science
399

Diabetes mellitus typ 1: Vuxnas skattningar och upplevelser av livskvalitet vid kolhydraträkning : En litteraturstudie

Lind, Ann-Marie, Sundlöf, Sofia January 2016 (has links)
Background: Type 1 Diabetes is a disease that is present in all ages. A treatment with carbohydrate counting and flexible insulin dosing provides a freer diet and is used today in much of the world. Carbohydrate counting with flexible insulin dosing can improve the quality of life in people with diabetes. With support and training the nurse has an important role to support people in their self-care. Aim: To describe how adults with type 1 diabetes mellitus rated and felt their quality of life when using carbohydrate calculated insulin dose and to describe included studies' data collection methods. Method: Descriptive literature review of 13 articles. Literature searches were made in the databases PubMed and CINAHL. Main results: After participating in a structured training regarding carbohydrate counting with flexible insulin dosing rated and experienced the adults with type 1 diabetes, an increased quality of life with greater freedom to customize their diet according to their life situation. Their knowledge of diabetes increased, which gave them a better self-control and self-esteem leading to better self-care. The number of severe hypoglycemia and the fear of them decreased with a carbohydrate calculated insulin dose. Articles used validated questionnaires as data collection methods. Conclusion: Adults with type 1 diabetes, who participated in a structured education in carbohydrate counting with flexible insulin dosing increased their quality of life in both the short and long term and got a better understanding of the disease that gave better self-control and self-esteem leading to better self-care. / Bakgrund: Diabetes mellitus typ 1 är en sjukdom som finns i alla åldrar. En behandlingsmetod med kolhydraträkning och flexibel insulindosering ger en friare kosthållning och används idag i en stor del av världen. Kolhydraträkning med flexibel insulindosering kan förbättra livskvaliteten hos personer med diabetes. Med stöd och utbildning inom området har sjuksköterskan en viktig uppgift att stötta personerna i deras egenvård. Syfte: Att beskriva hur vuxna med diabetes mellitus typ 1 skattade och upplevde sin livskvalitet vid kolhydratberäknad insulindosering samt att beskriva inkluderade studiers datainsamlingsmetoder. Metod: Deskriptiv litteraturstudie av 13 artiklar. Litteratursökningar gjordes i databaserna PubMed och Cinahl. Huvudresultat: Efter deltagande i en strukturerad utbildning i kolhydraträkning med flexibel insulindosering skattade och upplevde vuxna med diabetes mellitus typ 1 en ökad livskvalitet med en ökad frihet att anpassa sin kost efter sin livssituation. Deras kunskaper om diabetessjukdomen ökade vilket gav dem en bättre självkontroll och självkänsla vilket ledde till bättre egenvård. Antalet svåra hypoglykemier och rädslan för dessa minskade med en kolhydratberäknad insulindosering. Artiklarna använde validerade frågeformulär som datainsamlingsmetod. Slutsats: Vuxna med diabetes mellitus typ 1 som deltagit i en strukturerad utbildning i kolhydraträkning med flexibel insulindosering ökade sin livskvalitet både på kort och lång sikt samt fick bättre kunskap om sjukdomen som gav bättre självkontroll och självkänsla vilket ledde till bättre egenvård.
400

Effects of protein in carbohydrate-electrolyte solutions on post-exercise rehydration / CUHK electronic theses & dissertations collection

January 2014 (has links)
This thesis aimed to, first, examine the effects of the addition of whey protein or casein protein to common carbohydrate-electrolyte (CE) solutions on post-exercise rehydration; second, examine the effects of various contents of whey protein in CE solutions on post-exercise rehydration; and third, investigate the mechanisms on the increased fluid retention after the ingestion of CE plus whey protein solutions. / The first study (Chapter 4) of this thesis examined the effects of CE solution added with a certain amount of whey or casein protein on post-exercise rehydration. Ten young healthy males (mean ± SEM, age: 20.7 ± 0.4 years; body weight (BW): 65.4 ± 2.0 kg; maximal oxygen uptake (VO₂ₘₐₓ): 60.7 ± 1.9 mL·kg⁻¹·min⁻¹) were recruited in this study. Three main experimental trials were conducted in a randomized single-blinded crossover design and separated by at least 7 days between any two of them. In each main trial, subjects ran for 60 min at 65% VO₂ₘₐₓ on a treadmill in a warm and humid environment (24 °C, 60% relative humidity (RH)), which was followed by a 4-hour recovery period. During recovery, the subjects were provided with either a common CE solution, or a CE with whey protein (CW) solution, or a CE with casein protein (CC) solution. The three solutions were matched for energy and electrolyte content and were provided in six equivalent volumes at 30 min intervals with a total volume equivalent to 150% of their BW loss. The nude BW, urine samples, and capillary blood samples were collected before and after exercise and at the end of each hour during recovery. After exercise, the subjects lost approximately 2.3% of their pre-exercise BW in all trials. Total urine volume after recovery was higher in the CE and CC trials than in the CW trial (CE vs. CW vs. CC: 1184 ± 120 mL vs. 1005 ± 68 mL vs. 1256 ± 130 mL, p < 0.05), which induced greater fluid retention in CW trial compared with both CE and CC trials (CE vs. CW vs. CC: 46.9 ± 5.2% vs. 54.9 ± 2.9% vs. 45.8 ± 5.5%, p < 0.05). By the end of recovery, the urine specific gravity (USG) was lower in the CE trial than in both CW and CC trials (CE vs. CW vs. CC: 1.002 ± 0.001 g·mL⁻¹ vs. 1.004 ± 0.001 g·mL⁻¹ vs. 1.004 ± 0.000 g·mL⁻¹, p < 0.05). In addition, the urine osmolality was lower in the CE trial than in both CW and CC trials after recovery (CE vs. CW vs. CC: 111 ± 18 mmol·kg⁻¹ vs. 181 ± 14 mmol·kg⁻¹ vs. 195 ± 23 mmol·kg⁻¹, p < 0.05). However, no difference was found in the changes of plasma volume among trials throughout recovery. These results suggested that during a 4-hour recovery after 60 min run which induced about 2% BW loss, the CE plus whey protein solution was more effective in fluid retention compared with the isocaloric CE or CE plus casein protein solution. / The second study (Chapter 5) was conducted to examine the effects of various contents of whey protein in CE solutions on post-exercise rehydration; meanwhile, the mechanisms on the greater fluid retention after the ingestion of CE plus whey protein solutions were investigated as well. Ten young healthy males (mean ± SEM, age: 22.0 ± 0.7 years; BW: 64.5 ± 1.9 kg; VO₂ₘₐₓ: 59.8 ± 1.9 mL·kg⁻¹·min⁻¹) finished five main experimental trials in a randomized single-blinded crossover manner and separated by at least 7 days. After a 60-min run at 65% VO₂ₘₐₓ on a treadmill in each main trial, a 4-hour recovery period was carried out. During recovery, five solutions of 1) a CE solution with high CHO content (CE-H); 2) a CE solution with low CHO content (CE-L); 3) a CE solution with high content of whey protein (CW-H); 4) a CE solution with medium content of whey protein (CW-M); and 5) a CE solution with low content of whey protein (CW-L) were consumed by the subjects randomly. The electrolyte content was matched, whereas CE-H, CW-H, CW-M, and CW-L solutions were matched for energy density, CE-L and CW-H solutions were matched for CHO content. The total volume consumed by subjects was 150% of the BW loss, and the solutions were provided in six equal volumes at 30 min intervals during recovery. The nude BW, urine samples, and capillary and venous blood samples were obtained before and after exercise and at the end of each hour during recovery. The results showed that the subjects lost about 2.2% of BW after exercise. By the end of the recovery, the total urine volume was smaller in the CW-M trial than in the CE-H trial (CE-H vs. CW-M: 1295 ± 103 mL vs. 1049 ± 130 mL, p < 0.05), whereas the CW-H trial was smaller than the CE-H, CE-L, and CW-L trials (CE-H vs. CE-L vs. CW-L vs. CW-H: 1295 ± 1033 mL vs. 1284 ± 90 mL vs. 1141 ± 58 mL vs. 891 ± 73 mL, p < 0.01). The less urine production in the CW-M and CW-H trials resulted in a greater fluid retention compared with CE-H, CE-L, and CW-L trials (CE-H vs. CE-L vs. CW-L vs. CW-M vs. CW-H: 38.4 ± 5.2% vs. 36.1 ± 4.3% vs. 43.0 ± 3.8% vs. 51.0 ± 5.7% vs. 55.4 ± 3.8%, p < 0.05). The CE-H and CE-L trials showed lower USG and urine osmolality compared with the CW-L, CW-M, and CW-H trials at the end of recovery (p < 0.05). In addition, the plasma osmolality of the CE-L trial was lower than that of the CW-L, CW-M, and CW-H trials at the 1st hour of recovery (CE-L vs. CW-L vs. CW-M vs. CW-H: 274 ± 4 mmol·kg⁻¹ vs. 291 ± 4 mmol·kg⁻¹ vs. 301 ± 6 mmol·kg⁻¹ vs. 293 ± 6 mmol·kg⁻¹, p < 0.05). The plasma volume was lower in the CE-L trial than that in the CW-H trial at the 2nd and 3rd hour, and the CE-L trial reached the lowest plasma volume than the other four trials by the end of recovery (p < 0.05). The aldosterone concentration was lower in both CE-H and CE-L trials compared with the CW-M and CW-H trials after recovery (CE-H vs. CE-L vs. CW-M vs. CW-H: 228 ± 100 pg·mL⁻¹ vs. 211 ± 51 pg·mL⁻¹ vs. 336 ± 85 pg·mL⁻¹ vs. 333 ± 70 pg·mL⁻¹, p < 0.05). The antidiuretic hormone (ADH) concentration was also found to be lower in the CE-L trial than in the CW-H trial at the 1st and 2nd hour of recovery (p < 0.05). However, no difference was found in plasma albumin concentrations among trials throughout recovery. The results indicated that the CE solutions with higher whey protein content retained more fluid compared with CE solutions with lower whey protein content or CE solution alone. The greater fluid retention was partly caused by the elevated aldosterone concentrations in the situations of current study. / In summary, the experimental results of this thesis found that the consumption of common CE solution plus whey protein can retain more fluid in body than isocaloric CE or CE plus casein protein solution during post-exercise recovery. CE solutions with relative higher whey protein content were more effective in fluid retention than CE solutions with lower whey protein content. Furthermore, the additive effects on fluid retention caused by whey protein supplementation were induced by the increased concentrations of plasma aldosterone. The elevated plasma osmolality and ADH concentrations maybe also played a role in the greater fluid retention. However, further studies are needed to clarify this issue. The current findings provided more evidences in this research topic and suggested some recommendations to athletes and sports enthusiasts to reach rehydration rapidly and effectively after exercise. / 本論文的研究目的包括:首先,研究在普通的碳水化合物-電解質(CE)飲料中添加乳清蛋白或酪蛋白對運動後復水的影響;其次,研究CE飲料中添加不同劑量的乳清蛋白對運動後復水的影響;再次,闡述飲用CE加乳清蛋白飲料後更能有效的將水分保留在人體內的機制。 / 實驗一(第四章)研究了在CE飲料中加入一定劑量的乳清蛋白或酪蛋白對運動後復水的影響。十位年輕、健康男性受試者(平均值 ± 標準誤,年齡: 20.7 ± 0.4 歲;體重: 65.4 ± 2.0 千克;最大攝氧量: 60.7 ± 1.9 mL·kg⁻¹·min⁻¹)自願參加本項測試。按照隨機單肓交叉設計,他們完成了三次主測試,期中任何兩次測試時間都相隔七天以上。在每一次主測試中,受試者首先在跑臺上以65%最大攝氧量的運動強度完成了60分鐘的跑步運動(運動環境控制在24攝氏度,60%相對濕度),隨後開始4小時的運動後恢復階段。在恢復過程中,受試者會分別飲用三種不同飲料中的一種。三種飲料包括:(1)普通CE飲料(CE組);(2)普通CE飲料中添加乳清蛋白(CW 組);(3)普通CE飲料中添加酪蛋白(CC 組)。三種飲料含有相同的能量密度及電解質濃度。受試者在每次主測試中飲用的總飲料體積為1.5倍的體重減少量,這些飲料分為6等份并每隔30分鐘由受試者飲用一份。運動前、後及在恢復階段每隔一小時收集受試者的體重(裸重)、尿液樣本、及血液樣本(指尖取血)。在三次主測試中,受試者在運動結束後減少的體重量約為運動前體重的2.3%。在4小時的恢復階段中,CE組和CC組受試者排出的尿液總體積大於CW組(CE vs. CW vs. CC: 1184 ± 120 mL vs. 1005 ± 68 mL vs. 1256 ± 130 mL, p < 0.05)。所以,恢復結束後,CW組的水分保持比例高於CE組及CC組(CE vs. CW vs. CC:46.9 ± 5.2% vs. 54.9 ± 2.9% vs. 45.8 ± 5.5%, p < 0.05)。在恢復結束時,CE組的尿比重低於CW組及CC組(CE vs. CW vs. CC: 1.002 ± 0.001 g·mL⁻¹ vs. 1.004 ± 0.001g·mL⁻¹ vs. 1.004 ± 0.000 g·mL⁻¹, p < 0.05)。另外,在恢復結束後,CE組尿滲透壓水平低於CW組及CC組(CE vs. CW vs. CC: 111 ± 18 mmol·kg⁻¹ vs. 181 ± 14mmol·kg⁻¹ vs. 195 ± 23 mmol·kg⁻¹, p < 0.05)。但是,在恢復階段,血漿容量的變化在三組中沒有顯著差異。本實驗的結果表明,完成60分鐘跑步後,受試者丟失掉約2%的體重,在之後4小時恢復階段中,飲用添加乳清蛋白的CE飲料比有相同能量密度的普通CE飲料或添加酪蛋白的CE飲料更能有效的將水分保留在體內。 / 實驗二(第五章)研究了在普通CE飲料中添加不同劑量的乳清蛋白對運動後復水的影響;同時,也研究了飲用CE加乳清蛋白飲料後更能有效的將水分保留在人體內的機制。十位年輕、健康男性受試者(平均值 ± 標準誤,年齡: 22.0 ± 0.7 歲;體重: 64.5 ± 1.9 千克;最大攝氧量: 59.8 ± 1.9 mL·kg⁻¹·min⁻¹)自願參加本項測試。按照隨機單肓交叉設計,他們完成了五次主測試,任何兩次測試的時間都相隔七天以上。在每一次主測試中,受試者首先在跑臺上以65%最大攝氧量的運動強度完成了60 分鐘的跑步運動,隨後開始4 小時的運動後恢復階段。在恢復過程中,受試者會飲用五種不同飲料中的一種。五種飲料包括:(1)普通CE飲料,含有較高的CHO濃度(CE-H組);(2)普通CE飲料,含有較低的CHO濃度(CE-L組);(3)普通CE飲料添加較高劑量的乳清蛋白(CW-H組);(4)普通CE飲料添加中等劑量的乳清蛋白(CW-M組);(5)普通CE飲料添加較低劑量的乳清蛋白(CW-L組)。五種飲料含有相同濃度的電解質,其中,CE-H,CW-H,CW-M,及CW-L組有相同的能量密度,CE-L 及CW-H 組有相同的CHO含量。在每次主測試的恢復階段,受試者飲用的飲料總體積為1.5倍的體重減少量,這些飲料分為6等份并每隔30分鐘由受試者飲用一份。運動前、後及在恢復階段每隔一小時收集受試者的體重(裸重)、尿液樣本、及血液樣本(指尖取血及靜脈取血)。運動結束後,受試者的體重減少量約為運動前體重的2.2%,五組測試中沒有顯著差異。在4小時的恢復階段後,CW-M 組受試者的尿液總體積小於CE-H組(CE-H vs. CW-M:1295 ± 103 mL vs. 1049 ± 130 mL, p < 0.05);同時,CW-H組的尿量低於CE-H,CE-L,及CW-L組(CE-H vs. CE-L vs. CW-L vs. CW-H: 1295 ± 103 mL vs. 1284 ± 90mL vs. 1141 ± 58 mL vs. 891 ± 73 mL, p < 0.01)。相對於CE-H,CE-L,及CW-L組,較少的尿液排出量使CW-M及CW-H組能將更多的水分保留在體內(CE-H vs.CE-L vs. CW-L vs. CW-M vs. CW-H: 38.4 ± 5.2% vs. 36.1 ± 4.3% vs. 43.0 ± 3.8% vs.51.0 ± 5.7% vs. 55.4 ± 3.8%, p < 0.05)。在恢復結束後,CE-H及CE-L組的尿比重水平及尿滲透壓水平低於CW-L,CW-M,及CW-H組(p < 0.05)。另外,在恢復階段的第1小時,CE-L組的血漿滲透壓水平低於CW-L,CW-M,及CW-H組(CE-L vs. CW-L vs. CW-M vs. CW-H: 274 ± 4 mmol·kg⁻¹ vs. 291 ± 4 mmol·kg⁻¹ vs. 301 ± 6 mmol·kg⁻¹ vs. 293 ± 6 mmol·kg⁻¹, p < 0.05)。在恢復階段的第2及3小時,CE-L組的血漿容量低於CW-H組;在恢復結束時,CE-L組的血漿容量低於其它四組(p <0.05)。對于兩種體液平衡調節激素,在恢復結束時,CE-H及CE-L組的醛固酮水平低於CW-M及CW-H組(CE-H vs. CE-L vs. CW-M vs. CW-H: 228 ± 100 pg·mL⁻¹ vs. 211 ± 51 pg·mL⁻¹ vs. 336 ± 85 pg·mL⁻¹ vs. 333 ± 70 pg·mL⁻¹, p < 0.05)。在恢復階段的第1及2小時,CE-L組的抗利尿激素水平低於CW-H組(p < 0.05)。然而,五組測試中,血漿白蛋白水平在恢復階段沒有顯著差異。本實驗的研究結果表明,普通CE飲料中加入較高劑量的乳清蛋白比較低劑量的乳清蛋白更能有效的將水分保留在人體內。這種較高水平的水分保留能力與醛固酮激素水平的升高有關。 / 綜上所述,本論文的研究結果發現,在運動後的恢復階段飲用添加乳清蛋白的CE飲料比有相同能量密度的普通CE飲料或添加酪蛋白的CE飲料更能有效的將水分保留在人體內。並且,在CE飲料中加入較高劑量的乳清蛋白比較低劑量的乳清蛋白對人體內水分的保留更加有效。另外,這種較高水平的水分保留能力是由醛固酮激素水平的升高引起的。同時,較高的血漿滲透壓及抗利尿激素水平可能對這種高效的水分保留能力也有一定的促進作用,但需要更多的研究來闡述這一觀點。本論文的研究結果為運動後復水的相關研究提供了更多的理論證據,並且對運動員及運動愛好者在運動結束後如何進行快速有效的復水提出了指導及建議。 / Li, Liang. / Thesis (Ph.D.)--Chinese University of Hong Kong, 2014. / Includes bibliographical references (leaves 131-149). / Abstracts also in Chinese; appendixes includes Chinese. / Title from PDF title page (viewed on 01, November, 2016). / Detailed summary in vernacular field only. / Detailed summary in vernacular field only. / Detailed summary in vernacular field only. / Detailed summary in vernacular field only.

Page generated in 0.0244 seconds