期刊文献+
共找到1,189,966篇文章
< 1 2 250 >
每页显示 20 50 100
尼莫地平与羚角钩藤汤在治疗急性缺血性脑卒中的疗效观察 认领
1
作者 郑本端 郑丽阳 郑劲松 《亚洲急诊医学病例研究》 2014年第1期1-3,共3页
目的:回顾性总结2012 年泉州市中医院内一科收治的急性缺血性脑卒中患者30 例。方法:回顾性分析2012.01~2012.12 全年泉州市中医院内一科收治的急性缺血性脑卒中患者30 例,总结治疗方法。结果:本文观察的30 例患者经采用尼莫地平配合羚... 目的:回顾性总结2012 年泉州市中医院内一科收治的急性缺血性脑卒中患者30 例。方法:回顾性分析2012.01~2012.12 全年泉州市中医院内一科收治的急性缺血性脑卒中患者30 例,总结治疗方法。结果:本文观察的30 例患者经采用尼莫地平配合羚角钩藤汤治疗治疗后基本痊愈20 例,显著进步8 例,进步1 例,自动出院1 例。结论:采用尼莫地平配合羚角钩藤汤治疗急性缺血性脑卒中痰热内闭证患者可取得良好疗效。 展开更多
关键词 急性缺血性脑卒中 尼莫地平 羚角钩藤汤 痰热内闭证
在线阅读 下载PDF
与肺癌相关的基因共表达网络的构建与分析 认领
2
作者 翟媛媛 陈颖丽 薛济先 《计算生物学》 2016年第2期33-40,共8页
肺癌是目前世界范围内发病率和死亡率最高的恶性肿瘤,它是一种复杂的分子网络疾病。为了进一步了解肺癌致病的分子机制,我们使用加权基因共表达网络分析(WGCNA)方法,对肺癌组织与其癌旁正常组织的差异表达基因进行分析,进而对差异表达... 肺癌是目前世界范围内发病率和死亡率最高的恶性肿瘤,它是一种复杂的分子网络疾病。为了进一步了解肺癌致病的分子机制,我们使用加权基因共表达网络分析(WGCNA)方法,对肺癌组织与其癌旁正常组织的差异表达基因进行分析,进而对差异表达基因进行模块的划分以及枢纽基因(hub gene)的识别,共得到了八个模块。通过计算每个模块特征向量基因(module eigengene)与样本特征的皮尔森相关系数,最终得到一个与肺癌高关联的模块(blue模块),发现blue模块的枢纽基因为碳酸酐酶4 (carbonic anhydrase 4, CA4),这一枢纽基因在模块中起着重要的作用。使用在线工具DAVID (Database for Annotation, Visualization and Integrated Discovery)对blue模块进行GO功能富集及KEGG通路分析。GO分析显示blue模块具有Rho 蛋白的信号转导调控、生物粘附、糖结合等生物功能;KEGG分析显示blue模块参与了轴突导向和O 型聚糖的生物合成通路。这些分析结果表明,文中识别的肺癌高关联模块和枢纽基因在肺癌的发生发展过程中起着潜在的重要作用。 展开更多
关键词 肺癌 基因共表达网络 枢纽基因 WGCNA
在线阅读 下载PDF
分子靶向药物与肿瘤 认领
3
作者 夏君燕 朱平 伍学强 《世界肿瘤研究》 2015年第4期65-73,共9页
依据已知肿瘤发生中涉及的异常分子或基因,设计针对这些特定分子和基因靶点的药物,选择性杀伤肿瘤细胞,这种治疗方法称为肿瘤的分子靶向治疗。目前分子靶向药物用于治疗乳腺癌、非小细胞肺癌、结直肠癌以及淋巴瘤、白血病等恶性肿瘤已... 依据已知肿瘤发生中涉及的异常分子或基因,设计针对这些特定分子和基因靶点的药物,选择性杀伤肿瘤细胞,这种治疗方法称为肿瘤的分子靶向治疗。目前分子靶向药物用于治疗乳腺癌、非小细胞肺癌、结直肠癌以及淋巴瘤、白血病等恶性肿瘤已取得令人瞩目的疗效。针对现有的治疗恶性肿瘤的分子靶向药物的作一综述。 展开更多
关键词 乳腺癌 非小细胞肺癌 结直肠癌 血液肿瘤 靶向治疗
在线阅读 下载PDF
成功介入溶栓治疗胃癌并发上肢深静脉血栓形成一例 认领
4
作者 任闽山 盖东和 《亚洲肿瘤科病例研究》 2013年第2期3-5,共3页
病人男性,58岁,因“胃癌化疗后1年半,左上肢肿胀2天”入院。查体:双侧颈部未及肿大淋巴结,左颈部肿胀,左上肢肿胀,左肘上8 cm周径32 cm,左肘下8 cm周径31 cm,右肘上、下周径28 cm。左上肢无触痛,血运良好。辅助检查:血常规:白细胞:4.8 &... 病人男性,58岁,因“胃癌化疗后1年半,左上肢肿胀2天”入院。查体:双侧颈部未及肿大淋巴结,左颈部肿胀,左上肢肿胀,左肘上8 cm周径32 cm,左肘下8 cm周径31 cm,右肘上、下周径28 cm。左上肢无触痛,血运良好。辅助检查:血常规:白细胞:4.8 &#215;109/l,血小板:113 &#215;109/l,凝血四项均在正常范围,B超显示左颈内静脉和左锁骨下静脉血栓形成。入院后在手术室局麻下于左肘部切开一3 cm皮肤切口,找到贵要静脉,穿刺置入中心静脉导管,注入造影剂证实左侧自腋静脉开始有血栓形成,置入1.5米超滑导丝至上腔静脉,然后带入多功能导管,分别于锁骨下静脉和颈内静脉内注入稀释后的重组人组织型纤溶酶原衍生物18 mg,于血栓远心端造影示左锁内下静脉和左颈内静脉已通畅,撤走导管,缝合贵要静脉穿刺孔,溶栓结束,回病房后给予抗凝、祛聚,2天后病人左上肢肿胀明显减轻。 展开更多
关键词 静脉血栓 溶栓
在线阅读 下载PDF
The Research of Voltage Sag and Power Frequency Overvoltage on 110kV Resistance Grounding System 认领
5
作者 Guo Zeng Guangliang Feng +1 位作者 Yanping Lv Shan Sun 《能源与动力工程(英文)》 2013年第4期873-876,共4页
This paper researches the voltage transfer characteristics when one-phase ground fault occurred in the resistance grounding system, by using the theory of the asymmetric variable characteristics and the sequence netwo... This paper researches the voltage transfer characteristics when one-phase ground fault occurred in the resistance grounding system, by using the theory of the asymmetric variable characteristics and the sequence network analysis of the -11 transformer, and concludes the scope of voltage sag and swell and the degree of power frequency overvoltage and their influencing factors in the 110 kV resistance grounding system. Accordingly this paper puts forward the resistance choosing principle: the resistance grounding coefficient must be equal to or greater than 10. So it can not only wipe out the voltage sag and voltage swell but also make sure the overvoltage is limited to electrical equipment allowing range. The method mentioned above is verified by simulation results of a 110 kV power system in ATP. 展开更多
关键词 NEUTRAL GROUNDING System by RESISTANCE One-phase GROUNDING FAULT Power Frequency OVERVOLTAGE
在线阅读 免费下载
Analysis on the Transfer Characteristics of Rogowski-coil Current Transformer and Its Influence on Protective Relaying 认领
6
作者 Yi Wang Jiaman Li +3 位作者 Yulan Hu Ranran An Zexiang Cai Ruiwen He 《能源与动力工程(英文)》 2013年第4期1324-1329,共6页
This paper systematically analyzes the transfer characteristics of the Rogowski-coil Current Transformer and its effect on protective relaying through theoretical analysis, experiments and simulations. The frequency c... This paper systematically analyzes the transfer characteristics of the Rogowski-coil Current Transformer and its effect on protective relaying through theoretical analysis, experiments and simulations. The frequency characteristics and transient characteristics of Rogowski transducer and Rogowski-coil Current Transformer are deeply analyzed based on the physical structure of the transformer.?It is revealed that broad bandwidth of the transformer can improve the performance of protective relaying, and the bandwidth is determined mainly by the parameters of the Rogowski transducer and signal processing circuits. It is also discovered that the measurement errors of transient current mainly depend on the abilities for the current transformer to reproduce an accurate replica of the decaying dc components, which is mainly decided by the decay time constant of the aperiodic component of transient current and the parameters of the integral unit. Finally, some measures are proposed for the performance improvement of Rogowski-coil Current Transformer to meet the requirements of protective relaying system in terms of structural design and testing standards. 展开更多
关键词 CURRENT TRANSFORMER Rogowski-coil TRANSFER Characteristics Protective RELAYING
在线阅读 免费下载
Applications of Data Mining Theory in Electrical Engineering 认领
7
作者 Yagang ZHANG Jing MA +1 位作者 Jinfang ZHANG Zengping WANG 《工程(英文)(1947-3931)》 2009年第3期211-215,共5页
In this paper, we adopt a novel applied approach to fault analysis based on data mining theory. In our researches, global information will be introduced into the electric power system, we are using mainly cluster anal... In this paper, we adopt a novel applied approach to fault analysis based on data mining theory. In our researches, global information will be introduced into the electric power system, we are using mainly cluster analysis technology of data mining theory to resolve quickly and exactly detection of fault components and fault sections, and finally accomplish fault analysis. The main technical contributions and innovations in this paper include, introducing global information into electrical engineering, developing a new application to fault analysis in electrical engineering. Data mining theory is defined as the process of automatically extracting valid, novel, potentially useful and ultimately comprehensive information from large databases. It has been widely utilized in both academic and applied scientific researches in which the data sets are generated by experiments. Data mining theory will contribute a lot in the study of electrical engineering. 展开更多
关键词 FAULT Analysis Data MINING THEORY CLASSIFICATION Electrical ENGINEERING
在线阅读 免费下载
Research on FAHP Method Based on Highway Bridge Safety 认领
8
作者 Changmin Yang Quanle Wang +1 位作者 Ruining Wei Kuo Lu 《工程(英文)(1947-3931)》 2018年第6期336-344,共9页
Basing on highway bridge construction technique and management features, this paper conducts analysis and establishment to construction safety risk factor, index system, etc. of actual engineering, after using vague s... Basing on highway bridge construction technique and management features, this paper conducts analysis and establishment to construction safety risk factor, index system, etc. of actual engineering, after using vague synthetic judgment method, analytic hierarchy process, implement research via integrated evaluation method, makes out argument to different safety risk factors, establishes bridge safety risk factor collection via method of comprehensive assessment, confirms bridge safety risk incidence value, judges matrix by using MATLAB construction vagueness, finally calculates concrete risk gradation sort, and gets highway bridge construction safety risk grade. Through practice it has proved that the construction safety risk assessment method is based on the method of quantification, can find out biggest influence factors on the safety of Bridges in engineering, and can also reduce the misjudgment caused by subjective factors. The safety of the bridge has a positive practical significance. 展开更多
关键词 HIGHWAY BRIDGE FAHP Method Safety RISK Assessment WEIGHT SORTING
在线阅读 免费下载
Test and Evaluation of Stiffness of a Pin Turning Device for Large Marine Engine Crankshafts 认领
9
作者 Y. H. Choi G. B. Ha +1 位作者 D. H. Kim H. S. An 《电力能源(英文)》 2013年第7期14-19,共6页
In order to prevent unwanted excited vibrations and to secure better machining precision in large size heavy duty machine tools dynamic stiffness is one of the most desirable and critical properties. In the past decad... In order to prevent unwanted excited vibrations and to secure better machining precision in large size heavy duty machine tools dynamic stiffness is one of the most desirable and critical properties. In the past decades, many researches on machine tool stiffness test and evaluation methodology have been made. However any methodology for a Pin Turning Device (PTD), which is a special kind of turning lathe for machining big size crankshaft pins, is rarely found among them. This study proposes a test and evaluation process of stiffness of a PTD by measuring frequency response function at the tool center point (TCP). For conformance proving for the proposed methodology, stiffness of a PTD obtained by the proposed method with impact hammer test (IHT) has been compared with that determined by FEM. 展开更多
关键词 PIN TURNING Device (PTD) Machine Tool STIFFNESS COMPLIANCE Response Function Impact HAMMER Test
在线阅读 免费下载
Congestion Management Strategies of Real-Time Market 认领
10
作者 Qi Wang Chunyu Zhang Yi Ding 《电力能源(英文)》 2014年第4期227-232,共6页
The high penetration of distributed energy resources (DERs) will significantly challenge the power system operation and control due to their stochastic, intermittent, and fluctuation characteristics. This enhances the... The high penetration of distributed energy resources (DERs) will significantly challenge the power system operation and control due to their stochastic, intermittent, and fluctuation characteristics. This enhances the difficulty of congestion management of power systems in cross-border electricity market among different regions. For handling this, the Real-Time Market is proposed for balancing capacity trading against congestions. Several strategies for Real-Time Market dealing with congestions are proposed. The strategy of two-stage crossborder markets in Day-ahead, Intra-day and Real Time Market are introduced with the congestion constraints complied. Pre-Contingency strategy is proposed as the advance preparation for the future congestion, and In-Day redispatch is used for regulation. Accordingly, the requirements on facilities considering telemetry and remote control in a fast manner are discussed at last. 展开更多
关键词 CONGESTION Management ELECTRICITY MARKET REAL-TIME MARKET DISTRIBUTED Energy Resources(DERs)
在线阅读 免费下载
Effect of Some Environmental Factors on Incidence and Severity of Angular Leaf Spot of Cotton in Yola and Mubi, Adamawa State, Nigeria 认领
11
作者 N. Z. Tuti H. Nahunnaro K. Ayuba 《世界工程和技术(英文)》 2015年第3期19-25,共7页
Environmental factors such as relative humidity and rainfall generally have been found to increase the incidence, rate of spread and severity of diseases thereby reducing yield of crops. Study was conducted on five co... Environmental factors such as relative humidity and rainfall generally have been found to increase the incidence, rate of spread and severity of diseases thereby reducing yield of crops. Study was conducted on five cotton varieties, which were artificially inoculated with bacterial blight pathogen to determine the effects of rainfall and relative humidity on incidence and severity of angular leaf spot (ALS) and yield of seed cotton in Yola and Mubi. Results showed that the severity of ALS was higher in Yola (58.65%) at 13 WAS assumed to be due to higher relative humidity range of 76% - 87% and low rainfall of 2 - 40.6 mm. This is assumed to have favoured disease development as against that of Mubi location which recorded lower severity (51.11%) due to lower relative humidity (42% - 55%) and rainfall (37 - 73 mm). Results further revealed that at 13 WAS, SAMCOT-8 had low incidence (66%) and severity (39%) in Yola. This was against the much higher corresponding incidence and severity of 82% and 42% respectively that was observed in Mubi during the same period. SAMCOT-10 and SAMCOT-9 varieties were found to be highly susceptible to the disease at the same period. SAMCOT-8 recorded the highest yield of 390.00 kg?ha?1 in Yola and 868.09 kg?ha?1 in Mubi while the lowest yields of 227.17 kg?ha?1 was observed on SAMCOT-10 in Yola while 461.61 kg?ha?1 was obtained on SAMCOT-9 in Mubi. The variation in yield among these varieties might be due to the differences in their reactions to the disease. There is a need to conduct further trials in these locations to confirm the level of resistance or other aspects of these varieties to the disease. 展开更多
关键词 ANGULAR Leaf Spot COTTON Rainfall Relative Humidity DISEASE INCIDENCE and DISEASE SEVERITY
在线阅读 免费下载
Production and Utilization of L-Arabinose in China 认领
12
作者 Biao Hu Haiyang Li +5 位作者 Qingfu Wang Yicong Tan Ruirong Chen Jingrong Li Wenting Ban Lei Liang 《世界工程和技术(英文)》 2018年第3期24-36,共13页
L-arabinose is a newly developed low-caloric monosaccharide, which has many biomedical and health effects, especially intestinal sucrase inhibition effect. L-arabinose is mainly produced by chemical or enzymatic hydro... L-arabinose is a newly developed low-caloric monosaccharide, which has many biomedical and health effects, especially intestinal sucrase inhibition effect. L-arabinose is mainly produced by chemical or enzymatic hydrolysis of hemicellulose. The taste of L-arabinose is quite similar to that of sucrose, with approximately 50% of the sweetness. As a functional additive, L-arabinose can be used in medical and pharmaceutical applications for the treatment of diseases such as diabetes, chronic constipation, mineral absorption disorder and secondary bile acid formation disorder. However, L-arabinose has not been widely used in functional foods due to high price and lack of publicity and guidance. A comprehensive review of L-arabinose physicochemical properties, production, applications field, market statue and development direction is presented in this paper. 展开更多
关键词 L-ARABINOSE Application FIELDS MARKET STATUE Development Direction
在线阅读 免费下载
A 180-Day Subchronic Oral Toxicity Study of Total Flavones of <i>E. leptorrhizum</i>Stearn in Rats 认领
13
作者 Ting Liu Lianqiang Hui +5 位作者 Chunyu Cao Ran Hao Shuangrong Gao Rong He Baoqiang Dai Lifang Wang 《中医(英文)》 2015年第1期34-53,共20页
A subchronic oral toxicity was conducted to evaluate the safety of total flavones of E. leptorrhizum Stearn in Sprague-Dawley rats. The test article was administered once daily by gavage in male and female rats at dos... A subchronic oral toxicity was conducted to evaluate the safety of total flavones of E. leptorrhizum Stearn in Sprague-Dawley rats. The test article was administered once daily by gavage in male and female rats at dose levels of 24, 48, and 96 mg/kg body weight/day for 180 days. 90 and 180 days after administration, ten and tweedy animals (each half of male and female) of each group were tested. 28 days after withdrawal, five male and female rats were tested. There were no significant toxicological changes shown in daily clinical signs, body weight, food consumption, hematology parameters, blood biochemistry, organ weights and histopathological examination except leukocyte differential count. It was concluded that the no-observed-effect level (NOEL) for total flavones of E. leptorrhizum Stearn was >96 mg/kg in SD rats. 展开更多
关键词 TOTAL Flavones of E. leptorrhizum Stearn Safety SUBCHRONIC TOXICITY
在线阅读 免费下载
Comparative study of breast cancer in Mexican and Mexican-American women 认领
14
作者 María Elena Martínez Luis Enrique Gutiérrez-Millan +36 位作者 Melissa Bondy Adrian Daneri-Navarro María Mercedes Meza-Montenegro Ivan Anduro-Corona Ma Isabel Aramburo-Rubio Luz María Adriana Balderas-Pe?a José Adelfo Barragan-Ruiz Abenaa Brewster Graciela Caire-Juvera Juan Manuel Castro-Cervantes Mario Alberto Chávez Zamudio Giovanna Cruz Alicia Del Toro-Arreola Mary E. Edgerton María Rosa Flores-Marquez Ramon Antonio Franco-Topete Helga Garcia Susan Andrea Gutierrez-Rubio Karin Hahn Luz Margarita Jimenez-Perez Ian K. Komenaka Zoila Arelí López Bujanda Dihui Lu Gilberto Morgan-Villela James L. Murray Jesse N. Nodora Antonio Oceguera-Villanueva Miguel Angel Ortiz Martínez Laura Pérez Michel Antonio Quintero-Ramos Aysegul Sahin Jeong Yun Shim Maureen Stewart Gonzalo Vazquez-Camacho Betsy Wertheim Rachel Zenuk Patricia Thompson 《健康(英文)》 2010年第9期1040-1048,共9页
Breast cancer is the number one cause of can- cer deaths among Hispanic women in the United States, and in Mexico, it recently became the primary cause of cancer deaths. This malign- nancy represents a poorly understo... Breast cancer is the number one cause of can- cer deaths among Hispanic women in the United States, and in Mexico, it recently became the primary cause of cancer deaths. This malign- nancy represents a poorly understood and un- derstudied disease in Hispanic women. The ELLA Binational Breast Cancer Study was es- tablished in 2006 as a multi-center study to as- sess patterns of breast tumor markers, clinical characteristics, and their risk factors in women of Mexican descent. We describe the design and implementation of the ELLA Study and provide a risk factor comparison between women in the U.S. and those in Mexico based on a sample of 765 patients (364 in the U.S. and 401 in Mexico). Compared to women in Mexico, U.S. women had significantly (p < 0.05) lower parity (3.2 vs. 3.9 mean live births) and breastfeeding rates (57.5% vs. 80.5%), higher use of oral contraceptives (60.7% vs. 50.1%) and hormone replacement therapy (23.3% vs. 7.6%), and higher family history of breast cancer (15.7% vs. 9.0%). Re- sults show that differences in breast cancer risk factor patterns exist between Mexico and U.S. women. We provide lessons learned from the conduct of our study. Binational studies are an important step in understanding disease pat- terns and etiology for women in both countries. 展开更多
关键词 Binational Study BREAST Cancer Hispanics Mexico UNITED STATES
在线阅读 免费下载
Combined Training in the Treatment of Type 2 Diabetes Mellitus: A Review 认领
15
作者 Cláudia Gomes Bracht Rodrigo Sudatti Delevatti Luiz Fernando Martins Kruel 《健康(英文)》 2017年第12期1605-1617,共13页
This study aimed to review combined training (CT) effects on HbA1c levels in patients with T2DM. Searches were conducted in PubMed via MEDLINE and Google Scholar. Of the 14 selected studies, 11 found reductions in HbA... This study aimed to review combined training (CT) effects on HbA1c levels in patients with T2DM. Searches were conducted in PubMed via MEDLINE and Google Scholar. Of the 14 selected studies, 11 found reductions in HbA1c levels. The interventions that performed both aerobic and resistance training in the same sessions were highlighted. In aerobic training, the best results were in the interventions between 30 and 45 minutes per session, with intensities between 60 and 80% of maximal parameters. In resistance training, the interventions with sets from 8 to 12 repetitions with intensities of 80% and 60% of 1RM respectively, or prescribed by maximal repetitions, were highlighted. We conclude that CT can result in better glycaemic control than AT and RT conducted alone. 展开更多
关键词 DIABETES COMBINED TRAINING Glycaemic Control HBA1C
在线阅读 免费下载
Hip External Rotator Strength and Compensatory Movement in Three Different Positions 认领
16
作者 Sun-Hee Ahn Ui-Jae Hwang +3 位作者 Sung-Hoon Jung Hyun-A Kim Jun-Hee Kim Oh-Yun Kwon 《健康(英文)》 2018年第1期132-144,共13页
Measuring intrinsic hip external rotator strength (ER) without compensatory pelvic motion and activation of the sartorius is important for preventing or rehabilitating lower extremity injuries. However, the optimal me... Measuring intrinsic hip external rotator strength (ER) without compensatory pelvic motion and activation of the sartorius is important for preventing or rehabilitating lower extremity injuries. However, the optimal method for measuring intrinsic hip ER muscle strength while minimizing compensatory pelvic motions and activation of the sartorius is unclear. The purpose of this study is to compare measurements of hip ER strength, compensatory pelvic motion, and sartorius activation in the sitting, prone, and sidelying positions. Thirty-one healthy subjects (16 males and 15 females) were recruited for this study. Hip ER strength, pelvic kinematics, and sartorius muscle activation were measured during maximal isometric contraction of the hip ER in the sitting, prone, and sidelying positions. Hip ER strength was measured using a load-cell-type strength-measurement sensor. Pelvic kinematics was measured using an electromagnetic motion-tracking sensor. Electromyography was used to measure sartorius muscle activity. Data were analyzed using one-way repeated-measures analysis of variance. The result showed that hip ER strength and sartorius muscle activation were significantly lower in the sidelying compared with the sitting and prone positions (p < 0.01). Pelvic anteroposterior tilting was significantly greater in the sitting compared with the prone and sidelying positions (p < 0.01). Pelvic rotation differed significantly among positions (p < 0.01). Pelvic lateral tilting was significantly greater in the prone compared with the sitting position (p < 0.017). Compensatory pelvic motion and sartorius muscle activation were lower when hip ER strength measurements were made in the sidelying position. Therefore, the sidelying position is effective for measuring selective intrinsic hip ER strength. 展开更多
关键词 COMPENSATORY PELVIC Motion HIP EXTERNAL ROTATOR Measurement Position SARTORIUS
在线阅读 免费下载
Recovery Slope of Heart Rate Variability as an Indicator of Internal Training Load 认领
17
作者 José Naranjo Orellana Claudio Nieto-Jiménez José F. Ruso-álvarez 《健康(英文)》 2019年第2期211-221,共11页
The way in which the Root Mean Square of the Successive Differences between adjacent RR intervals (RMSSD) recovers immediately after exercise could be a good indicator of internal training load (ITL). The aim of this ... The way in which the Root Mean Square of the Successive Differences between adjacent RR intervals (RMSSD) recovers immediately after exercise could be a good indicator of internal training load (ITL). The aim of this study is to design a recovery index based on RMSSD. Forteen healthy men took part in this study. The experiment lasted 2 weeks, with 4 separate (48 - 72 h) sessions. First session was an incremental treadmill test to determine ventilatory thresholds (VT1 and VT2) and maximal aerobic speed (MAS). Each subject ran at VT1 speed (second day), VT2 speed (third day) and a time-to-exhaustion test at MAS (fourth day). The duration of VT1 and VT2 loads was selected in such a way that the product intensity-duration (training load) was the same. HRV was measured from 10’ prior to test (Rest) to 30’ after completed (Recovery). Recovery slopes were calculated from RMSSD values at 10 and 30 minutes. Borg scale was recorded at the end of every test and the Training Impulse (TRIMP) values were calculated using Banister equations. The RMSSD values dropped substantially regardless of the intensity and the duration of exercise (average 4 ms). The RMSSD recovery was linear during the 30 min and different depending on the intensity of exercise. To propose a recovery index, we calculated the slope of RMSDD over the 30 minutes (slope-30) and also the first 10 minutes (slope-10). Given that the slopes presented an exponential behavior in relation with effort intensity, three curves were obtained (average values, plus SD and minus SD) defining a nomogram. For practical application, we propose: 1) to measure RMSSD the last 5 minutes of exercise and any period of 5 minutes during the first 30 minutes recovery;2) to calculate the slope of RMSSD between exercise and recovery;3) to compare with the nomogram. 展开更多
关键词 TRAINING LOAD RECOVERY HRV Rmssd PARASYMPATHETIC
在线阅读 免费下载
Incidence of Incidental Thyroid Nodules on Computed Tomography (CT) Scan of the Chest Performed for Reasons other than Thyroid Disease 认领
18
作者 Kurt Scherer Seth Means +2 位作者 Collins Chijioke Paul Karmin Mukta Panda 《临床医学国际期刊(英文)》 2011年第3期264-268,共5页
Previous studies demonstrate an approximately 16% incidence of incidental thyroid nodules (ITNs) on Computed To-mography (CT) of the head/neck and thorax combined. Malignant disease is present in many cases. No study ... Previous studies demonstrate an approximately 16% incidence of incidental thyroid nodules (ITNs) on Computed To-mography (CT) of the head/neck and thorax combined. Malignant disease is present in many cases. No study to date has quantified ITNs on CT of the thorax alone, an examination performed more frequently than head/neck CT. Our objective was to determine the prevalence and significance of ITNs with further stratification based on size criteria of non-dominant (10 mm) on CT imaging of the chest performed for indications other than thyroid disease and to assess if these were further evaluated. A retrospective analysisof 500 patients (257 men and 243 women;mean age, 58.3 +/– 16.7 years) with thoracic CT scans performed at Erlanger Health System from October 2007 to October 2008 was performed. ITNs were noted in 61 (12.2%) of patients. Nodules were solitary in 43 patients (70.5%) and multiple in 18 (29.5%). Thirty-three patients (6.6%) were found to have a dominant nodule >10 mm. Sixteen of the 33 patients with dominant nodules received further workup showing benign pathology in 50%. More than 50% of the 33 dominant nodules received no follow-up at all. Chest CT demonstrates many ITNs. The incidence in this study was 12.2% with 6.6% being potentially malignant dominant thyroid nodules. Partial thyroid glands were visualized in 58.2% exams, implying an incidence of 12.2% ITNs is an underestimate. It may be beneficial for routine chest CT to be extended 2cm superiorly in order to ensure full visualization of the thyroid gland and related pathology. 展开更多
关键词 THYROID NODULE Detection
在线阅读 免费下载
Barriers to Placement of Spirometers in Clinics Affiliated with an Academic Medical Center 认领
19
作者 Victor O. Kolade 《临床医学国际期刊(英文)》 2012年第1期31-35,共5页
United States physician office visits for asthma have increased since 1989, and most of these visits are to primary care physicians. The National Institutes of Health has published guidelines for asthma diagnosis and ... United States physician office visits for asthma have increased since 1989, and most of these visits are to primary care physicians. The National Institutes of Health has published guidelines for asthma diagnosis and management, implementation of which is expected to result in improved care and reduced costs. Compliance with asthma guidelines has been suboptimal, especially with spirometry recommendations, and more so in primary care clinics than in specialist clinics. Noncompliance has largely been attributed to physician and patient factors. This paper describes an experience with navigation of health system barriers to implementation of spirometry encountered at three primary care clinics affiliated with an internal medicine residency program. Included are perspectives and priorities of key individuals, systems issues related to institutions, and technical issues pertaining to spirometers. Navigation of ACGME core competencies is discussed. 展开更多
关键词 SPIROMETRY MEDICAL EDUCATION ASTHMA Systems-Based Practice
在线阅读 免费下载
Low-Load Bench Press Training to Fatigue Results in Muscle Hypertrophy Similar to High-Load Bench Press Training 认领
20
作者 Riki Ogasawara Jeremy P. Loenneke +1 位作者 Robert S. Thiebaud Takashi Abe 《临床医学国际期刊(英文)》 2013年第2期114-121,共8页
The purpose of this study was to determine whether the training responses observed with low-load resistance exercise to volitional fatigue translates into significant muscle hypertrophy, and compare that response to h... The purpose of this study was to determine whether the training responses observed with low-load resistance exercise to volitional fatigue translates into significant muscle hypertrophy, and compare that response to high-load resistance training. Nine previously untrained men (aged 25 [SD 3] years at the beginning of the study, standing height 1.73 [SD 0.07] m, body mass 68.9 [SD 8.1] kg) completed 6-week of high load-resistance training (HL-RT) (75% of one repeti-tion maximal [1RM], 3-sets, 3x/wk) followed by 12 months of detraining. Following this, subjects completed 6 weeks of low load-resistance training (LL-RT) to volitional fatigue (30% 1 RM, 4 sets, 3x/wk). Increases (p 0.05) in magnetic resonance imaging-measured triceps brachii and pectorals major muscle cross-sectional areas were similar for both HL-RT (11.9% and 17.6%, respectively) and LL-RT (9.8% and 21.1%, respectively). In addition, both groups increased (p 0.05) 1RM and maximal elbow extension strength following training;however, the percent increases in 1RM (8.6% vs. 21.0%) and elbow extension strength (6.5% vs. 13.9%) were significantly (p 0.05) lower with LL-RT. Both protocols elicited similar increases in muscle cross-sectional area, however differences were observed in strength. An explanation of the smaller relative increases in strength may be due to the fact that detraining after HL-RT did not cause strength values to return to baseline levels thereby producing smaller changes in strength. In addition, the results may also suggest that the consistent practice of lifting a heavy load is necessary to maximize gains in muscular strength of the trained movement. These results demonstrate that significant muscle hypertrophy can occur without high-load resistance training and suggests that the focus on percentage of external load as the important deciding factor on muscle hypertrophy is too simplistic and inappropriate. 展开更多
关键词 BENCH PRESS TRAINING Intensity MUSCLE CSA MRI Strength
在线阅读 免费下载
上一页 1 2 250 下一页 到第
使用帮助 返回顶部 意见反馈