Physical characteristics

物理特性
  • 文章类型: Journal Article
    面包生产中的原料和工艺参数可以调节血糖指数,这本身与提供更好的饥饿满意度和保持更好的饱腹感有关。这项研究的目的是调查是否使用未精制的小麦粉或在配方中添加完整的谷物或交替烘烤时间会对物理特性产生影响,感官质量,小麦酸面团面包中的血糖指数和食欲感觉。在研究中,三种类型的商业部分烘焙冷冻酸面团面包,使用两次不同的时间(长烘烤时间和短烘烤时间)烘烤至最终烘烤。对10名健康成年人进行了随机对照交叉试验,他们食用了足够量的面包以摄取50克可用碳水化合物。参与者自我报告食欲感觉(想吃东西,饥饿,丰满度,满意,食欲)在180分钟的时间内使用10厘米的视觉模拟量表(VAS)量表。此外,面包产品具有整体可接受性,并在JAR“大约正确”的量表上检查了不同的感官属性。不同的面包配方(精制面粉,未精制的小麦粉,谷物粉或完整谷物)和不同长度的烘烤时间显着影响(p<0.005)物理,产品的质地和感官特征。上述参数的改变降低了血糖指数,但不显著(p>0.005)。低GI之间没有发现相关性,饱腹感和饱腹感。饱腹感和饱腹感的喜欢评分和曲线下面积(iAUC)的增量计算为添加谷物的酸面团面包中最高。
    Raw materials and process parameters in bread production can modulate the glycemic index, which on itself has been linked with provision of better hunger satisfaction and maintaining better satiation. The objective of this research was to investigate if using unrefined wheat flour or the addition of intact cereals in formulation or alternating the baking time would have an effect on physical characteristics, sensory quality, glycaemic index and appetite sensations in wheat sourdough bread. In the study, three types of commercial part-baked frozen sourdough bread, baked to the final baking for two different times (long and short baking time) were used. A randomized controlled crossover trial was performed with 10 healthy adults who consumed sufficient quantity of bread to ingest 50 g available carbohydrates. Participants self-reported appetite sensations (desire to eat, hunger, fullness, satisfaction, appetite) on a 10 cm visual analog scale (VAS) scale in a course of 180 min. In addition, bread products were subjected to overall acceptability and different sensory attributes were examined on JAR \"just about right\" scale. Different bread formulations (refined flour, unrefined wheat flour, cereal flour or intact cereals) and different length of baking time significantly influenced (p < 0.005) physical, textural and sensory features of products. The alternation of aforementioned parameters decreased the glycemic index, but not significantly (p > 0.005). No correlation was found between lower GI, satiety and satiation. Liking score and incremental area under the curve (iAUC) of satiety and satiation were calculated as highest in sourdough bread with added cereals.
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  • 文章类型: Journal Article
    分层回填造成的分层结构面会降低回填的强度。缓速器的引入将弥补这一缺陷。三个减速器,三聚磷酸钠,柠檬酸和蔗糖,被介绍。在确定缓凝剂的最佳用量后,将它们以1:6的石灰与沙子的比例和75%的质量浓度添加到填充浆料中。基于水泥水化反应机理和损伤力学理论,进行了凝结时间试验和单轴抗压强度试验。借助扫描电子显微镜和X射线衍射,研究了缓凝剂对层状胶结充填体物理特性的影响机理。主要研究内容和成果如下:.结果表明,3种缓凝剂均能延缓水泥充填浆液的凝结时间,缓凝效果为蔗糖>柠檬酸>三磷酸钠。缓凝剂的加入可以提高分层固结回填土的单轴抗压强度和完整性。最佳填充间隔时间(FIT)为12h。适当添加缓凝剂将增加水泥水化产物的量,使水化产物的结构更致密,减少分层结构面的形成,并有助于提高层状胶结回填土的强度。
    The stratified structural plane caused by stratified backfill will reduce the strength of backfill, and the introduction of retarder will make up for the defect. Three retarders, sodium tripoly-phosphate, citric acid and sucrose, were introduced. After determining the optimal dosage of retarder, they were added into the filling slurry with a ratio of lime to sand of 1:6 and a mass concentration of 75%. Based on the hydration reaction mechanism and damage mechanics theory of cement, the setting time test and uniaxial compressive strength test were carried out. With the help of scanning electron microscopy and X-ray diffraction, the influence mechanism of retarder on the physical characteristics of stratified cemented filling was investigated.The main research contents and achievements are as follows:. The results showed that the three retarding agents can delay the setting time of the cement filling slurry, and the retarding effect is sucrose > citric acid > sodium tripolyphosphate. The addition of retarder can improve the uniaxial compressive strength and integrity of stratified consolidated backfill, and the best filling interval time (FIT) is 12 h. Appropriate addition of retarder will increase the amount of cement hydration products, make the structure of hydration products more dense, reduce the formation of stratified structural plane, and help to improve the strength of stratified cemented backfill.
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  • 文章类型: Journal Article
    目标:随着老年人口规模的逐渐增加,肌肉骨骼疾病,比如肌肉减少症,正在增加。诊断技术,如X射线,计算机断层扫描,磁共振成像用于预测和诊断肌肉减少症,和使用机器学习的方法正在逐渐增加。这项研究旨在创建一个模型,可以使用身体特征和活动相关变量来预测肌肉减少症,而无需医疗诊断设备。例如成像设备,适用于60岁或以上的老年人。
    方法:使用从韩国国家健康和营养检查调查获得的公开数据构建了肌少症预测模型。使用Logistic回归建立模型,支持向量机(SVM)XGBoost,LightGBM,RandomForest,和多层感知器神经网络(MLP)算法,以及用算法训练的模型的特征重要性,除了SVM和MLP,被分析。
    结果:用LightGBM算法构建的肌少症预测模型取得了最高的检验精度,0.848在构建LightGBM模型时,身体特征变量,如体重指数,体重,腰围显示出很高的重要性,和活动相关变量也被用于构建模型。
    结论:肌少症预测模型,只包括身体特征和活动相关因素,表现出优异的性能。该模型有可能帮助老年人早期发现肌肉减少症,特别是在获得医疗资源或设施有限的社区。GeriatrGerontolInt2024;••:••-•。
    OBJECTIVE: As the size of the elderly population gradually increases, musculoskeletal disorders, such as sarcopenia, are increasing. Diagnostic techniques such as X-rays, computed tomography, and magnetic resonance imaging are used to predict and diagnose sarcopenia, and methods using machine learning are gradually increasing. This study aimed to create a model that can predict sarcopenia using physical characteristics and activity-related variables without medical diagnostic equipment, such as imaging equipment, for the elderly aged 60 years or older.
    METHODS: A sarcopenia prediction model was constructed using public data obtained from the Korea National Health and Nutrition Examination Survey. Models were built using Logistic Regression, Support Vector Machine (SVM), XGBoost, LightGBM, RandomForest, and Multi-layer Perceptron Neural Network (MLP) algorithms, and the feature importance of the models trained with the algorithms, except for SVM and MLP, was analyzed.
    RESULTS: The sarcopenia prediction model built with the LightGBM algorithm achieved the highest test accuracy, of 0.848. In constructing the LightGBM model, physical characteristic variables such as body mass index, weight, and waist circumference showed high importance, and activity-related variables were also used in constructing the model.
    CONCLUSIONS: The sarcopenia prediction model, which consisted of only physical characteristics and activity-related factors, showed excellent performance. This model has the potential to assist in the early detection of sarcopenia in the elderly, especially in communities with limited access to medical resources or facilities. Geriatr Gerontol Int 2024; 24: 595-602.
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  • 文章类型: Journal Article
    [目的]对参加Kayoi-no-ba计划的不同年龄段的社区居住老年人的身体特征和功能进行分类和比较。[参与者和方法]本研究共招募了居住在新泻县六个城镇的176名社区老年人,他们在2018年至2020年期间参加了Kayoi-no-ba计划。物理特性,比如力量,balance,和流动性,被评估。[结果]在参加Kayoi-no-ba计划的老年女性和男性中,那些>80岁的人身高较短,重量更轻,和较低的身体肌肉质量比其他年龄组。力量,balance,和移动功能,包括握力,坐到站的测试,单腿支架试验,并定时进行测试,显著下降,尤其是年龄>80岁的患者。[结论]在参与Kayoi-no-ba计划的社区居住老年人中,身体特征和功能受到衰老的影响,显着下降,特别是在年龄>80岁的人群中。这些发现表明,早期干预对于维持肌肉质量是必要的,力量,balance,和老年人的流动性。
    [Purpose] To classify and compare the physical characteristics and functions of community-dwelling elderly individuals of various age groups participating in the Kayoi-no-ba program. [Participants and Methods] A total of 176 community-dwelling elderly individuals living in six cities and towns in the Niigata Prefecture who participated in the Kayoi-no-ba program between 2018 and 2020 were recruited in this study. Physical characteristics, such as strength, balance, and mobility, were assessed. [Results] Among elderly females and males who participated in the Kayoi-no-ba program, those >80 years of age showed shorter height, lighter weight, and lower body muscle mass than the other age groups. Strength, balance, and mobility functions, including grip strength, sit-to-stand test, single-leg-stand test, and timed up-and-go test, were significantly decreased, especially in patients aged >80 years. [Conclusion] Among community-dwelling elderly individuals participating in the Kayoi-no-ba program, physical characteristics and functions were affected by aging, with significant decline particularly in those aged >80 years old. These findings suggest that early intervention is necessary to maintain muscle mass, strength, balance, and mobility in the elderly.
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  • 文章类型: Journal Article
    背景:使用NaCl的酸洗过程是猪肉保存的重要步骤。本研究旨在研究不同超声强度的三频同步超声(TSIU)酸洗对猪肉(背背肌)NaCl含量和品质的影响。酸洗30分钟后,NaCl含量,水分含量,酸洗产量,烹饪损失,纹理属性,颜色,pH值,对猪肉的水分迁移和分布以及微观结构进行了评估。
    结果:结果表明,在所有超声处理强度(85-150W/L)中,以101.3W/L的强度酸洗的样品的NaCl含量高于其他强度。TSIU101.3W/L显示出比对照样品高59.95%的NaCl含量。此外,经101.3W/L的TSIU处理的样品具有更高的酸洗产率和水分含量,更好的猪肉质构特性(包括硬度和咀嚼性),减少烹饪损失。低场核磁共振(LF-NMR)结果表明,与对照组相比,超声辅助酸洗样品的T21弛豫时间增加,而T22(A22)减少的比例为175.0%至379.9%。微观结构指定超声处理可以促进肉质地的变化。
    结论:不同强度的超声腌制促进了NaCl的扩散,影响了猪里脊蛋白的品质。101.3W/L的TSIU可以更好地促进NaCl在肉上的运输和均匀分布,从而提高样品质量。本文受版权保护。保留所有权利。
    BACKGROUND: The pickling process with NaCl is an essential step for pork preservation. This study aimed to investigate the effect of different ultrasonic intensities of tri-frequency simultaneous ultrasound (TSIU) pickling on the NaCl content and quality of pork (longissimus dorsi). After 30 min pickling, the NaCl content, moisture content, pickling yield, cooking loss, textural properties, color, pH, moisture migration and distribution as well as microstructure of pork were assessed.
    RESULTS: Results showed that among all the ultrasonic treatment intensities (85-150 W L-1), the NaCl content of the sample pickled by an intensity of 101.3 W L-1 was higher than that of other intensities. TSIU 101.3 W L-1 showed 59.95% higher NaCl content than the control sample. In addition, the sample treated with TSIU of 101.3 W L-1 had higher pickling yield and moisture content, better textural properties of pork (including hardness and chewiness), and less cooking loss. The results of the low-field nuclear magnetic resonance showed that, compared with the control group, the relaxation time T21 of the ultrasound-assisted pickling samples increased, while the proportion of T22 (A22) reduction ranged from 175.0% to 379.9%. The microstructure designated that the ultrasonic treatment could facilitate changes in meat texture.
    CONCLUSIONS: Ultrasound marination of different intensities promoted the diffusion of NaCl and affected the quality of pork tenderloins. The TSIU at 101.3 W L-1 could better accelerate NaCl transport and homogeneous distribution on meat, thereby improving the sample quality. © 2024 Society of Chemical Industry.
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  • 文章类型: Journal Article
    对瑜伽的实证研究表明,定期练习可以对心血管疾病的危险因素产生有益的影响;它可以减轻体重,身体脂肪和增加肌肉质量。还报告了对平衡和灵活性的积极影响。这项研究评估了为期3个月的复杂瑜伽计划的影响,包括体育锻炼,教育,社会支持,在中年社区样本中进行准随机设计。干预组由46名参与者组成,而被动对照组为29名参与者。干预组显示核心肌肉力量和腿筋柔韧性显着增加,体内脂肪减少。未发现心血管疾病危险因素的显著变化,体重,肌肉质量,平衡能力,和饮食习惯。3个月的瑜伽干预不会对中年人的心血管系统和体重控制产生实质性影响。
    Empirical studies on yoga have shown that regular practice can have a beneficial effect on risk factors of cardiovascular diseases; also, it can decrease body weight, body fat and increase muscle mass. Positive effects on balance and flexibility were also reported. This study evaluated the impact of a 3-month complex yoga-based program, including physical exercises, education, and social support, with a quasi-randomized design in a middle-aged community sample. The intervention group consisted of 46 participants while the passive control group was 29 participants. The intervention group showed a significant increase in core muscle strength and hamstring flexibility and a decrease in body  fat. No significant changes were found concerning risk factors of cardiovascular diseases, body weight, muscle mass, balancing ability, and dietary habits. A 3-month yoga intervention cannot substantially impact the cardiovascular system and body weight control in middle-aged adults.
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  • 文章类型: Journal Article
    目的:这项研究的目的是辨别在足球队中占据不同位置的女运动员的有氧能力的差异。并了解运动员在不同位置的身体特征。重要的是要了解球员的身体要求取决于他们在球场上的位置,一个极大影响他们训练和游戏玩法的因素。
    方法:这项研究对25名女性足球运动员进行了抽样,平均年龄22.72岁(±2.69标准差),他们都是中国女超的积极参与者。样本分布在几个游戏位置,包括前锋,中场,和捍卫者。为了收集有关摄氧量的相关数据,在跑步机上进行了渐进式负荷测试,再加上气体分析仪来收集呼吸指数(JAEGER,德国)。
    结果:研究表明,不同位置的球员之间的最大摄氧量存在显着差异。中场球员表现出最高的VO2最大值,为63.24±7.04ml/kg/min,其次是平均为58.92±7.70ml/kg/min的前锋,最后记录最小平均值为55.73±4.40ml/kg/min的防御者。
    结论:这项研究的结果表明,球员在团队中的位置作用与他们的有氧能力相关。因此,位置需求显著塑造了玩家的身体特征,影响他们的训练和游戏。这种理解对于足球运动中不同位置的运动员的最佳状态至关重要。
    OBJECTIVE: The aim of the study was to discern the disparities in the aerobic capacity of female athletes occupying various positions within a soccer team, and to understand the physical characteristics of the athletes in different positions. It is critical to understand that the physical demands for players vary depending on their positions on the field, a factor that greatly influences their training and gameplay.
    METHODS: The study engaged a sample of 25 female soccer players, average age of 22.72 (±2.69 SD), all of whom were active participants in the Chinese Women\'s Super League. The sample was distributed across several playing positions, including forwards, midfielders, and defenders. To gather pertinent data on oxygen uptake, a progressive load test was administered on a treadmill, coupled with a gas analyzer to amass respiratory indices (JAEGER, Germany).
    RESULTS: The study revealed that there was a notable variance in the maximum oxygen uptake among players in different positions. The midfielders exhibited the highest VO2 max at 63.24±7.04 ml/kg/min, followed by the forwards who averaged at 58.92±7.70 ml/kg/min, and finally the defenders who recorded the smallest average at 55.73±4.40 ml/kg/min.
    CONCLUSIONS: The outcomes of this study indicate that the positional role of a player in a team correlates with their aerobic capacity. Therefore, the positional demands significantly shape the player\'s physical characteristics, influencing their training and gameplay. This understanding is vital for the optimal conditioning of athletes in different positions in the sport of soccer.
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  • 文章类型: Journal Article
    鸡蛋是世界上最有营养的食物之一,由于其功能属性,如发泡,在许多食品应用中的多功能成分,乳化,和着色剂。在过去的十年中,由于蛋黄的营养和健康益处,许多研究已经报道了蛋黄的分馏和表征,尤其是蛋黄颗粒。这导致了新的食品和包装材料的开发。然而,加工过程中它们的物理特性的影响显着影响蛋黄颗粒的功能。在本概述中,蛋黄,颗粒部分的分离,分馏,组件,并首次提出了分子蛋白质结构。其次,讨论了过去十年发表的关于蛋黄颗粒的最新研究。此外,讨论了颗粒在不同行业的应用以及当前的具体科学挑战。最后,它简化了不同处理方法过程中颗粒物理特性的变化以及对食品中所得产品功能的影响(乳化剂,可食用薄膜),Pharmaceutical,和卫生(封装系统和生物传感器)部门。
    Eggs are among the most nutritious foods in the world, a versatile ingredient in many food applications due to their functional attributes such as foaming, emulsifying, and coloring agents. Many studies have been reported on egg yolk fractionation and characterization in the last decade because of its nutritional and health benefits, especially egg yolk granules. This has led to the development of new food products and packaging materials. However, the influence of their physical characteristics during processing significantly impacts the functionality of yolk granules. In this overview, the egg yolk, the granule fraction\'s separation, fractionation, components, and molecular protein structure are first presented. Secondly, recent studies on egg yolk granules published over the past decade are discussed. Furthermore, the application of the granules in different industries and current specific scientific challenges are discussed. Finally, it simplifies the changes in the physical characteristics of the granules during different treatment methods and the impact on the functionalities of the resulting products in the food (emulsifiers, edible films), pharmaceutical, and health (encapsulation systems and biosensors) sectors.
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  • 文章类型: Journal Article
    由于鱼类养殖的加剧以及抗生素耐药性在动物和人类之间的相关传播,有必要在疾病的治疗和预防中发现新的替代方法。益生菌似乎是有希望的候选者,因为它们能够刺激免疫反应并抑制病原体的生长。
    本研究的目的是制备各种组成的鱼饲料混合物,根据它们的物理特性(球形,流量,密度,硬度,脆性,和干燥损失),选择最适合用选定的益生菌菌株植物乳杆菌R2Biocenol™CCM8674(新编号。植物乳杆菌)。通过序列分析检查益生菌菌株是否存在植物植物蛋白相关基因。将基于具有胶态二氧化硅的干涂层然后是含有植物乳杆菌的淀粉水凝胶的本发明的涂层技术应用于颗粒,并在不同温度(4°C和22°C)下在11个月期间测试益生菌的活力。还确定了益生菌在人工胃液和水(pH=2和pH=7)中的释放动力学。进行了化学和营养分析,以比较对照和包衣颗粒的质量。
    结果显示益生菌在24小时内逐渐充分释放,在这两种环境下,从10英里处的104CFU到测量结束时的106CFU。在4°C(108)的整个储存期间,活的益生菌的数量是稳定的,并且没有观察到活的益生菌的显著减少。Sanger测序显示存在植物乳杆菌素A和植物乳杆菌素EF。化学分析显示,与未包衣的核心相比,多种营养素增加。这些发现公开了本发明的用选择的益生菌菌株的包衣方法改善了营养组成并且没有恶化丸粒的任何物理特性。应用的益生菌也逐渐释放到环境中,并且在4°C下长时间储存时具有很高的存活率。这项研究的结果证实了制备和测试的益生菌鱼混合物的潜力,将来可用于体内实验和养鱼场以预防传染病。
    UNASSIGNED: Due to the intensification of fish farming and the associated spread of antimicrobial resistance among animals and humans, it is necessary to discover new alternatives in the therapy and prophylaxis of diseases. Probiotics appear to be promising candidates because of their ability to stimulate immune responses and suppress the growth of pathogens.
    UNASSIGNED: The aim of this study was to prepare fish feed mixtures with various compositions and, based on their physical characteristics (sphericity, flow rate, density, hardness, friability, and loss on drying), choose the most suitable one for coating with the selected probiotic strain Lactobacillus plantarum R2 Biocenol™ CCM 8674 (new nom. Lactiplantibacillus plantarum). The probiotic strain was examined through sequence analysis for the presence of plantaricin- related genes. An invented coating technology based on a dry coating with colloidal silica followed by starch hydrogel containing L. plantarum was applied to pellets and tested for the viability of probiotics during an 11-month period at different temperatures (4°C and 22°C). The release kinetics of probiotics in artificial gastric juice and in water (pH = 2 and pH = 7) were also determined. Chemical and nutritional analyses were conducted for comparison of the quality of the control and coated pellets.
    UNASSIGNED: The results showed a gradual and sufficient release of probiotics for a 24-hour period, from 104 CFU at 10 mi up to 106 at the end of measurement in both environments. The number of living probiotic bacteria was stable during the whole storage period at 4°C (108), and no significant decrease in living probiotic bacteria was observed. Sanger sequencing revealed the presence of plantaricin A and plantaricin EF. Chemical analysis revealed an increase in multiple nutrients compared to the uncoated cores. These findings disclose that the invented coating method with a selected probiotic strain improved nutrient composition and did not worsen any of the physical characteristics of pellets. Applied probiotics are also gradually released into the environment and have a high survival rate when stored at 4°C for a long period of time. The outputs of this study confirm the potential of prepared and tested probiotic fish mixtures for future use in in vivo experiments and in fish farms for the prevention of infectious diseases.
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  • 文章类型: Journal Article
    洪水在全球范围内造成了社会经济和环境破坏,因此,需要研究。影响洪水事件的几个因素,比如极端降雨,物理特性,和当地的人为因素;因此,这些因素对于绘制洪水风险区域和采取减轻其造成的损害的措施至关重要。本研究旨在绘制和分析属于同一大西洋森林生物群落的三个不同研究区域中易受洪水风险影响的区域,洪水灾害反复发生。由于众多因素的存在,使用层次分析法进行了多指标分析。首先,地理空间数据库由高程层组成,斜坡,排水距离,土壤排水,土壤水文组,降水,救济,土地使用和覆盖。然后生成研究区域的洪水风险图,研究区域的模式得到了验证,连续几天的强降水影响最大,通道边缘的高程,具有较低的高度变化和平坦的组合,靠近主河两岸的密集建筑区域,和主要水道中富有表现力的水团。结果表明,这些特征共同表明了洪水事件的发生。
    Floods have caused socio-economic and environmental damage globally and, thus, require research. Several factors influence flooding events, such as extreme rainfall, physical characteristics, and local anthropogenic factors; therefore, such factors are essential for mapping flood risk areas and enabling measures that mitigate the damage they cause. This study aimed to map and analyze regions susceptible to flood risk in three different study areas belonging to the same Atlantic Forest biome, in which flood disasters are recurrent. Due to the presence of numerous factors, a multicriteria analysis using the Analytical Hierarchical Process was conducted. First, a geospatial database was composed of layers of elevation, slope, drainage distance, soil drainage, soil hydrological group, precipitation, relief, and land use and cover. Flood risk maps for the study area were then generated, and patterns in the study areas were verified, with the greatest influence being exerted by intense precipitation on consecutive days, elevation at the edges of the channel with low altimetric variation and a flat combination, densely built areas close to the banks of the main river, and an expressive water mass in the main watercourse. The results demonstrate that these characteristics together can indicate the occurrence of flooding events.
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