Ethylene can alter plant morphology due to its effect on cell expansion. The most widely documented example of ethylene-mediated cell expansion is promotion of the "triple response" of seedlings grown in the dark in ethylene. Roots and hypocotyls become shorter and thickened compared with controls due to a reorientation of cell expansion, and curvature of the apical hook is more pronounced. The...

Purpose: We seek improved image quality from accelerated EPI data, particularly at ultra-high field. Certain artifacts in EPI reconstructions can be attributed to nonlinear phase differences between data acquired using frequency encoding gradients of alternating polarity. These errors appear near regions of local susceptibility gradients, and typically cannot be corrected with conventional Nyqu...

BACKGROUND This study aimed to compare the imaging quality, apparent diffusion coefficient (ADC) values, and application values between reduced field-of-view diffusion-weighted imaging (rFOV DWI) and single-shot echo-planar-imaging diffusion-weighted imaging (SS-EPI DWI) of breast tissue. PATIENTS AND METHODS For 87 cases (75 with normal breast tissue, 12 with mammary cancer), breasts were sc...

Weber, Jean-Michel, and Deena S. Shanghavi. Regulation of glucose production in rainbow trout: role of epinephrine in vivo and in isolated hepatocytes. Am J Physiol Regulatory Integrative Comp Physiol 278: R956–R963, 2000.— The rate of hepatic glucose production (Ra glucose) of rainbow trout (Oncorhynchus mykiss) was measured in vivo by continuous infusion of [6-3H]glucose and in vitro on isola...

RATIONALE AND OBJECTIVES Both single-shot diffusion-weighted echo-planar imaging (EPI) and line scan diffusion imaging (LSDI) can be used to obtain magnetic resonance diffusion tensor data and to calculate directionally invariant diffusion anisotropy indices, ie, indirect measures of the organization and coherence of white matter fibers in the brain. To date, there has been no comparison of EPI...

Recently, attention has been focused on comparing left ventricular (LV) endocardial (ENDO) with epicardial (EPI) pacing for cardiac resynchronization therapy. However, the effects of ENDO and EPI lead placement at multiple sites have not been studied in failing hearts. We hypothesized that differences in the improvement of ventricular function due to ENDO vs. EPI pacing in dyssynchronous (DYSS)...

BACKGROUND Exocrine pancreatic insufficiency (EPI) is characterized by a deficiency of exocrine pancreatic enzymes, resulting in malabsorption. Numerous conditions account for the etiology of EPI, with the most common being diseases of the pancreatic parenchyma including chronic pancreatitis, cystic fibrosis, and a history of extensive necrotizing acute pancreatitis. Treatment for EPI includes ...

OBJECTIVE In our previous in vitro study mid-myocardial relative to epicardial pacing decreased transmural dispersion of depolarization (TDR) and prevented ventricular arrhythmia. We therefore hypothesized that in vivo mid-myocardial pacing in canines has a similar effect. METHODS AND RESULTS Using custom-made electrodes, monophasic action potentials were simultaneously recorded in vivo from ...

AIMS In exocrine pancreatic insufficiency (EPI), the quantity and/or activity of pancreatic digestive enzymes are below the levels required for normal digestion, leading to maldigestion and malabsorption. Diagnosis of EPI is often challenging because the characteristic signs and symptoms overlap with those of other gastrointestinal conditions. Additionally, there is no single convenient, or spe...

Purpose: Diffusion-weighted Imaging (DWI) using readout-segmented EPI (rs-EPI) with 2D navigator correction [1] is an alternative to standard single-shot EPI (ss-EPI) that improves image quality by reducing susceptibility artifacts and allowing a higher spatial resolution. This improved image quality raises the possibility that the low b-value image could be used to replace a separate T2-weight...