排序方式： 共有92条查询结果，搜索用时 15 毫秒
71.
通过对近几年大樱桃发展的观察思考,认为早熟大樱桃品种是临沂的发展趋势,并根据各品种的表现,提出了适合临沂大力发展的6个早熟品种,并给出了与之相适应的栽培技术措施． 相似文献
72.
Meghan A. Brown Emma J. Stevenson Glyn Howatson 《European Journal of Sport Science》2019,19(1):95-102
AbstractTart Montmorency cherry concentrate (MC) has been reported to attenuate the symptoms of exercise-induced muscle damage (EIMD) and to accelerate exercise recovery, which has been attributed to its high anti-inflammatory and antioxidant properties. Although these data are promising, there are no data regarding exclusively female populations. Therefore, the aim of this investigation was to examine the efficacy of MC on recovery following EIMD in females. In a randomised, double-blind, placebo-controlled study, twenty physically active females (mean?±?SD age 19?±?1?y; stature 167?±?6?cm; body mass 61.4?±?5.7?kg) consumed MC or a placebo (PL) for eight days (30?mL twice per day). Following four days of supplementation, participants completed a repeated-sprint protocol and measures of muscle soreness (DOMS), pain pressure threshold (PPT), limb girth, flexibility, muscle function, and systemic indices of muscle damage and inflammation were collected pre, immediately post (0?h) and 24, 48 and 72?h post-exercise. Time effects were observed for all dependent variables (p?<?0.05) except limb girth and high sensitivity C-reactive protein. Recovery of countermovement jump height was improved in the MC group compared to PL (p?=?0.016). There was also a trend for lower DOMS (p?=?0.070) and for higher PPT at the rectus femoris (p?=?0.071) in the MC group. The data demonstrate that MC supplementation may be a practical nutritional intervention to help attenuate the symptoms of muscle damage and improve recovery on subsequent days in females. 相似文献
73.
BackgroundCitrulline is one of the non-essential amino acids that is thought to improve exercise performance and reduce post-exercise muscle soreness. We conducted a systematic review and meta-analysis to determine the effect of citrulline supplements on the post-exercise rating of perceived exertion (RPE), muscle soreness, and blood lactate levels.MethodsA random effects model was used to calculate the effect sizes due to the high variability in the study design and study populations of the articles included. A systematic search of PubMed, Web of Science, and ClinicalTrials.gov was performed. Eligibility for study inclusion was limited to studies that were randomized controlled trials involving healthy individuals and that investigated the acute effect of citrulline supplements on RPE, muscle soreness, and blood lactate levels. The supplementation time frame was limited to 2 h before exercise. The types and number of participants, types of exercise tests performed, supplementation protocols for L-citrulline or citrulline malate, and primary (RPE and muscle soreness) and secondary (blood lactate level) study outcomes were extracted from the identified studies.ResultsThe analysis included 13 eligible articles including a total of 206 participants. The most frequent dosage used in the studies was 8 g of citrulline malate. Citrulline supplementation significantly reduced RPE (n = 7, p = 0.03) and muscle soreness 24-h and 48-h after post-exercise (n = 7, p = 0.04; n = 6, p = 0.25, respectively). However, citrulline supplementation did not significantly reduce muscle soreness 72-h post-exercise (n = 4, p = 0.62) or lower blood lactate levels (n = 8, p = 0.17).ConclusionCitrulline supplements significantly reduced post-exercise RPE and muscle soreness without affecting blood lactate levels. 相似文献
74.
为了避免杨梅因加工不当而导致花色苷的降解,研究了pH值、温度、金属离子、光照条件对杨梅汁中花色苷稳定性的影响。结果表明,在加工过程中杨梅果汁与Fe3+的接触、高温长时间处理和长时间光照均会使花色苷降解。以花色苷含量和红度为指标,分别研究柠檬酸、β-环状糊精和NaCl对杨梅汁的护色效果,采用L9(34)正交试验,通过极差和方差分析,发现影响杨梅汁护色效果的主次因素为:柠檬酸>NaCl>β-环状糊精,且柠檬酸和NaCl的影响均达到了极显著水平,β-环状糊精的影响达到了显著水平;最佳护色剂配比为:0.25mg/g的柠檬酸、0.20mg/g的β-环状糊精、0.25mg/g的NaCl。 相似文献
75.
徐辉艳 《陕西教育学院学报》2013,(2):55-59
为探讨温度和时间对红枣汁化学成分变化的影响,本试验将红枣汁在50-100℃温度下连续进行12小时处理,每隔2小时测定红枣汁中的5-HMF、总糖、氨基酸态氮、总酚、和Vc指标的变化。结果表明:随着加热温度的升高,时间的延长,红枣汁中的5-HMF含量逐渐增加,总糖、氨基酸态氮、总酚和Vc含量逐渐减少。 相似文献
76.
77.
采用电化学沉积将铂纳米颗粒固定到碳纤维微电极上,制备了一种新型铂纳米颗粒修饰微电极.将铂纳米颗粒修饰微电极与毛细管电泳联用,对抗坏血酸进行了检测.探讨了铂的电沉积时间、电位,氯铂酸的浓度,缓冲溶液pH、浓度,检测电势和分离电压等对该电极的影响.实验结果表明,该电极对抗坏血酸的线性范围为1.0×10-6～8.0×10-6 mol/L和8.0×10-6～1.0×10-3 mol/L,相关系数分别为0.998 1和0.999 2,信噪比为3时,检出限为8.0×10-7 mol/L.利用该电极实现了果汁中抗坏血酸的定量检测. 相似文献
78.
Near-infrared (NIR) transmittance spectroscopy combined with least-squares support vector machine (LS-SVM) was investigated to study the quality change of tomato juice during the storage. A total of 100 tomato juice samples were used. The spectrum of each tomato juice was collected twice: the first measurement was taken when the tomato juice was fresh and had not undergone any changes, and the second measurement was taken after a month. Principal component analysis (PCA) was used to examine a potential capability of separating juice before and after the storage. The soluble solid content (SSC) and pH of the juice samples were determined. The results show that changes in certain compounds between tomato juice before and after the storage period were obvious. An excellent precision was achieved by LS-SVM model compared with discriminant partial least-squares (DPLS), soft independent modeling of class analogy (SIMCA), and discriminant analysis (DA) models, with 100% of a total accuracy. It can be found that N1R spectroscopy coupled with LS-SVM, DPLS, SIMCA, and DA can be used to control the quality change of tomato juice during the storage. 相似文献
79.
80.
采用天然再生剂大蒜汁并结合开炼、密炼等再生方法对废溴化丁基橡胶的再生情况进行探讨。结果表明：开炼温度、开炼时间、密炼温度、密炼时间及再生剂用量对再生效果均有影响,且在这些因素中,再生剂为主导因素。在开炼温度为55℃、开炼时间为10min、加入再生剂用量为6%时再生效果最佳;密炼温度为125℃、密炼时间10min、再生剂用为6%时取得最佳再生效果。 相似文献