DNA molecules stretching and deformation in hydrodynamic flow field has been investigated for many years with various experimental and theoretical methods. This research was performed experimentally in hybridized microchannels made of poly(dimethylsiloxane)(PDMS) and glass. We will directly measure the hydrodynamic stretching DNA molecules in elongation flow by CLSM (Confocal Laser Scanning Microscope). The deformation of YOYO-labeled lambda phage DNA molecules in flows was visualized with CLSM. The relation between DNA contour length and relaxation time in different models of stretching flows was also be presented. Furthermore, the distribution of stretching DNA molecules in microchannels was derived to analyze and compared with the DNA migration velocity and stress relaxation modulus.

Thesis (M.S.)--University of Wyoming, 2007. / Title from PDF title page (viewed on Nov. 25, 2008). Includes bibliographical references.

Thesis (M.S.)--Oregon State University, 2009. / Printout. Includes bibliographical references (leaves 71-76). Also available on the World Wide Web.

Thesis (M.S.)--Oregon State University, 1996. / Includes mounted photographs. Typescript (photocopy). Includes bibliographical references. Also available on the World Wide Web.

Thesis (D.PT.)--Sage Colleges, 2010. / "May 2010." "A Capstone project for PTY 768 presented to the faculty of The Department of Physical Therapy Sage Graduate School in partial fulfillment of the requirements for the degree of Doctor of Physical Therapy." Includes bibliographical references.

The purpose of this study was to compare effects of static and dynamic stretching on explosive agility movements, and to examine the effect of the interaction of dynamic and static stretching prior to explosive agility movements. Fourteen men and 10 women performed the different warm-up protocols, including no warm-up (NWU), static stretching (SS), dynamic stretching (DS), and dynamic stretching with static stretching (DS+SS). The T-Drill was used to assess agility. The results indicated no difference between the NWU and SS conditions (effect size = 0.40, p = 0.06), as well as no significant difference between the NWU and DS+SS conditions (effect size = 0.01, p = 0.48), and the SS and DS+SS conditions (effect size = 0.40, p = 0.06). Statistically significant differences were found between the NWU and DS conditions (effect size = 0.45, p = 0.03), the SS and DS conditions (effect size = 0.85, p < 0.001), and the DS and DS+SS conditions (effect size = 0.40, p = 0.03). Agility test times, in order from fastest to slowest, were (a) dynamic stretching (10.87 ± 1.07 s), (b) dynamic stretching + static stretching (11.41 ± 1.26 s), (c) no warm-up (11.42 ± 1.21 s), (d) static stretching (11.90 ±1.35 s). Dynamic stretching resulted in the fastest agility test time. Static stretching resulted in the slowest agility times. The benefits of dynamic stretching may have been diluted when followed by Static Stretching, and the agility test time was the same as if no form of stretching was completed. Static stretching prior to agility is not recommended as it has a negative effect on the stretch shortening cycle, and agility. The results support the use of dynamic stretching prior to agility performance.

Thesis (DHSc) -- AUT University, 2008. / Includes bibliographical references. Also held in print (xvii, 177 leaves : ill. (some col.) ; 30 cm.) in the Archive at the City Campus (T 616.7223062 REI)

Stretching is commonly used by many athletes in different sports. Although acute stretching, as part of a warm-up, can enhance range of motion, it may also reduce performance. Acute stretching can reduce peak force, rate of force production, and power output. Chronic stretching may enhance performance, although the mechanism is unclear. Acute stretching has little effect on injury. However, chronic stretching (not part of warm-up) may have some injury reduction potential.

No description available.

Dissertation submitted to the Faculty of Health Services in partial compliance with the requirements for the Master's Degree in Technology: Chiropractic, at Technikon Natal, 2001. / This study aims to provide insight into the relative effectiveness of two different approaches in the treatment of sacro - iliac syndrome. Until recently, the sacro - iliac joints were not commonly considered to be mobile enough to suffer from detectable restriction of motion (Panzer and Gatterman 1995:453). Kirkaldy - Willis et al. (1992:126) however, states that sacro - iliac syndrome is a well defined and common type of dysfunction. Frymoyer et al. (1991 :2114) also reports sacro - iliac syndrome to be common, although it is frequently overlooked as a source of low back pain. This study will attempt to determine whether manipulation of the sacro - iliac joints together with Proprioceptive Neuromuscular Facilitation (P.N.F.) stretching of the piriformis muscles is a more effective treatment for sacro - iliac syndrome, than manipulation alone. This will be accomplished by determining which approach yields the best patient response in terms of subjective and objective clinical findings. The study conducted was a randomised clinical trial consisting of two groups of 30 patients each. The patients were randomly allocated into the two groups. All patients received four treatments over a two - week period. Group one received manipulation of the sacro - iliac joints alone, while Group two received manipulation of the sacro - iliac joints together with P.N.F. stretching of the piriformis muscles. Only the sacro - iliac joint on the side of the sacro - iliac syndrome was manipulated, and only the piriformis muscle on the side of the sacro - iliac syndrome was stretched. If any patients became asymptomatic within the treatment period, then the treatment was terminated. The patients were however required to return for all the remaining consultations for observational purposes. The results of the Numerical Pain Rating Scale, Oswestry Low Back Disability Index questionnaire, inclinometer and algometer readings, as well as the sacro - iliac orthopaedic tests, were recorded before the first and second treatments, and immediately following the fourth (final) treatment. / M