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1.
BackgroundWith the increased popularity of foam rolling (FR), it is important to establish the exact manner in which the practice is useful.PurposeThe purpose of this study was to examine the impact of FR the iliotibial (IT) band on hip adduction range of motion (ROM) and the short-term time course of any ROM changes that may occur.MethodIn a within-subject design, 34 subjects (21 female, 13 male) (female mean age 24.67 ± 8.6 yrs, height 161.4 ± 9.8 cm, mass 67.3 ± 12.3 kg; male mean age 22 ± 2.5 yrs, height 170.2 ± 8.2 cm, mass 76.3 ± 21.9 kg) underwent a baseline Ober’s test to measure hip adduction ROM prior to the FR and control conditions. Subjects rolled the lateral portion of each thigh for 3 bouts of 20 seconds. A tempo of 3 seconds down and 3 seconds up the leg was maintained across FR bouts. A 5-minute walk served as the control condition. The Ober’s test was repeated at less than 1 minute, 3 minutes, 10 minutes, 15 minutes, and 20 minutes following the FR bouts and the control to assess changes in hip adduction ROM over time. A blinded clinician conducted the Ober’s test. A two-way analysis of variance was used to assess differences by condition and time.ResultsNo differences in hip adduction ROM were found at baseline between FR and CON within subjects (27.9 cm ± 7.5 vs. 27.7 cm ± 6.6, p > .05). Ober’s test ROM was significantly greater in FR compared to CON immediately post-treatment (24.2 cm ± 6.3 vs. 28.2 cm ± 6.3, p = .00, d = .59), and 3 minutes post (24.6 cm ± 7.6 vs. 28.3 cm ± 5.9, p = .00, d = .56). No differences were observed 10 minutes post, 15 minutes post, or 20 minutes post FR or CON (p > .05).DiscussionCompared to walking, FR the IT band significantly increased hip adduction ROM as measured by the Ober’s test. These increases appear to dissipate between 3 and 10 minutes post-FR.ConclusionAn acute bout of 3 sets of 20 seconds of FR may be effective for transiently increasing ROM. Whether these short-term increases have implications for chronic flexibility changes is unclear.Level of evidence2  相似文献   
2.
 目的 比较黄金微针射频与超脉冲CO2点阵激光治疗不同类型面部凹陷性痤疮瘢痕的临床疗效及安全性。方法 选取我院门诊2019年8月—2021年8月诊治的80例凹陷性痤疮瘢痕患者为研究对象,采用随机数字表法分为治疗组和对照组,每组各40例。治疗组采用黄金微针射频治疗;对照组采用超脉冲CO2 点阵激光治疗。比较两组疗效,并按临床亚型(V型、U型和M型)对患者进行分类和评价。结果 两组患者治疗后痤疮瘢痕临床评分量表(ECCA)权重评分均降低,但差异无统计学意义(t=0.46, P=0.644)。 两组患者总体有效率比较差异无统计学意义(X2=1.89,P=0.176)。两组瘢痕亚型比较,治疗组M型瘢痕疗效较好(t=2.34, P<0.05),对照组V型瘢痕疗效较好(t=-2.36, P<0.05),而两组U型瘢痕疗效无明显差异(t=0.24, P>0.05)。治疗组患者术中疼痛程度、术后红肿期程度评分均低于对照组,痂皮脱落愈合时间短于对照组,差异均有统计学意义(均P<0.05)。结论 黄金微针射频与CO2点阵激光均能有效地改善面部凹陷性痤疮瘢痕,其中前者对M型瘢痕疗效显著,后者对V型瘢痕疗效显著。提示临床工作中可对痤疮瘢痕进行亚型分析,进而选择性治疗,必要时可联合治疗,起到协同作用。  相似文献   
3.
Fordyce spots are ectopic sebaceous glands which typically present as asymptomatic, multiple whitish, or yellowish 1–3‐mm sized papules on the lips. Several therapeutic approaches have been proposed such as laser, electrical or chemical ablation, and micropunch excision. However, these modalities pose the risk of scarring from inevitable surface damage. In this report, we present a case of Fordyce spots which was successfully treated with intralesional electrocoagulation using a proximally insulated microneedle and monopolar radiofrequency device, resulting in marked cosmetic improvements without surface damage.  相似文献   
4.
Introduction: Fractional lasers and microneedling devices are increasingly used with topical drugs to treat various conditions, including alopecia, as they grant access to dermal structures such as hair follicles and cutaneous vasculature.

Objective: To perform a comprehensive review on transcutaneous drug delivery for the management of alopecia.

Methods: PubMed, Embase, and Ovid Medline databases were searched using terms including: alopecia, microneedling, lasers, androgenetic alopecia (AGA), alopecia areata (AA), drug delivery. Articles were examined for inclusion criteria: diagnosis of alopecia regardless of type, use of fractional laser or microneedling devices, and subsequent administration of topical medication.

Results: 8 studies, 6 prospective clinical trials and 2 case series, examining either AA or AGA were identified. For AA, five studies examined microneedling together with topical triamcinolone in three of these, while two studies used photodynamic therapy. Regarding AGA, two studies used topical minoxidil plus microneedling, and one examined topical finasteride with fractional erbium glass laser. Improvement was seen in 6 of the 8 studies.

Discussion: Transcutaneous drug delivery via fractional laser and microneedling is a promising modality with preliminary evidence for increased hair regrowth over topical therapy alone. Further studies are needed to elucidate treatment parameters and appropriate device selection for drug delivery.  相似文献   

5.
以球面滚子轴承为研究对象,运用切片法,综合考虑了滚子 滚道凸度以及轴承内圈倾斜角的影响,建立了滚子并排和滚子错排的球面滚子轴承滚子载荷的计算模型。数值计算了内圈倾斜角、径向游隙、滚子错排角、以及外载荷等参数对球面滚子轴承滚子载荷和轴承内圈径向位移量的影响。计算结果表明,在一定的外载荷作用下,轴承内圈倾斜角度与滚子最大载荷呈线性变化规律;错排滚子的球面滚子轴承最大滚子载荷比并排略小,内圈径向位移量也略小。  相似文献   
6.
目的:探讨穴位放血疗法联合微针配合米诺地尔治疗进展期雄激素性秃发的疗效。方法:将2016年1月-2018年1月笔者科室门诊收治的85例男性进展期雄激素性秃发患者随机分成两组,联合组(放血疗法联合微针配合米诺地尔)43例和对照组(微针配合米诺地尔)42例。比较两组患者治疗3个月、6个月后的疗效、毛发密度及血清睾酮(T)、双氢睾酮(DHT)、性激素结合球蛋白(SHBG)及游离睾酮(FT)水平,比较两组患者停药后的复发情况及治疗期间出现的不良反应。结果:治疗3个月、6个月后,联合组患者总有效率均明显高于对照组,终毛密度与总毛发密度均明显高于对照组(P<0.05),毳毛密度与对照组患者相比,差异无统计学意义(P>0.05);治疗3个月、6个月后,联合组患者DHT、FT水平比对照组明显降低,SHBG水平比对照组明显升高(P<0.05);T水平与对照组相比,差异无统计学意义(P>0.05);停药12个月后,联合组患者的总复发率低于对照组患者(P<0.05),联合组患者治疗期间不良反应发生率低于对照组患者(P<0.05)。结论:穴位放血疗法联合微针配合米诺地尔治疗进展期雄激素性秃发患者疗效确切,不仅可以明显增加患者头发密度、降低复发率,还可以平衡患者的性激素,且安全性高。  相似文献   
7.
8.
Transdermal patches are effective treatment modalities which have variety of advantages. Active ingredient in these systems are absorbed from skin and reach to blood circulation via capillaries. Bypassing hepatic metabolism, providing constant plasma levels of drug for long time, and fewer drug interactions are the main advantages of this method. It is also practical to use. Nowadays transdermal patches are used by dermatologist for variety of indications.  相似文献   
9.
This paper defines the wear process of rollers made of 20Cr4. Rollers with a diameter of 1000 mm were installed in a roller press used for the production of drop-shaped briquettes and the copper concentrate was briquetted for 1100 h. Three-dimensional (3D) geometry analysis, metallographic analysis, macroscopy, scanning electron microscopy, as well as hardness measurements were performed. It was observed that the working surface was non-uniformly worn. The smallest wear affects the molding cavities situated on the outermost edges of the ring. The wear increases as the center of the ring is approximated, and it reaches its maximum at the middle of the ring. The molding cavities also wear asymmetrically. For the shape considered in this study, the lower part of a cavity is subject to a higher wear rate. We found that the material of the working ring was carburized, but its hardness was significantly lower than required. The roller ring microstructure changes depended on the distance from the cavity’s face. An investigation of the wear mechanisms showed different types of abrasive wear, corrosive processes, and plastic deformation. The exact type and course of wear were described, depending on the location on the working surface.  相似文献   
10.
Karmen Cheung 《Drug delivery》2016,23(7):2338-2354
In recent years, there has been a surge in the research and development of microneedles (MNs), a transdermal delivery system that combines the technology of transdermal patches and hypodermic needles. The needles are in the hundreds of micron length range and therefore allow relatively little or no pain. For example, biodegradable MNs have been researched in the literature and have several advantages compared with solid or hollow MNs, as they produce non-sharp waste and can be designed to allow rapid or slow release of drugs. However, they also pose a disadvantage as successful insertion into the stratum corneum layer of the skin relies on sufficient mechanical strength of the biodegradable material. This review looks at the various technologies developed in MN research and shows the rapidly growing numbers of research papers and patent publications since the first invention of MNs (using time series statistical analysis). This provides the research and industry communities a valuable synopsis of the trends and progress being made in this field.  相似文献   
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