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Fast kicker systems are required for the proposed upgrade of ALS to a diffraction-limited light source (ALS-U). The main approach is to have multiple stripline kicker magnets driven by inductive adders. The design details of the kicker structures and the inductive adder options will be discussed.
The Advanced Light Source (ALS) at Berkeley Lab has seen many upgrades over the years, keeping it one of the brightest sources for soft x-rays worldwide. Recent developments in magnet and vacuum technology, as well as lattice design (multi bend achromat lattices) appear to open the door for very large further increases in brightness [1]. This could be achieved by reducing the horizontal emittance,
An overview of the design of compact elliptically polar-izing undulator with small round magnetic gap to provide full polarization control of synchrotron radiation in a more cost effective manner and consuming less built in space than the state of the art devices. This type of undulator is meant as source for the potential future Soft X-ray (SXL) FEL beamline using the linear accelerator at MAX IV
This article extends the common correlated effects pooled (CCEP) estimator to homogenous dynamic panels. In this setting, CCEP suffers from a large bias when the time span (T) of the dataset is fixed. We develop a bias-corrected CCEP estimator that is consistent as the number of cross-sectional units (N) tends to infinity, for T fixed or growing large, provided that the specification is augmented
Cell-based therapies represent a new therapeutic approach for stroke. In 2007, investigators from academia, industry leaders, and members of the National Institutes of Health crafted recommendations to facilitate the translational development of cellular therapies as a novel, emerging modality for stroke from animal studies to clinical trials. This meeting was called Stem Cell Therapies as an Emer
Old age is associated with an enhanced susceptibility to stroke and poor recovery from brain injury, but the cellular processes underlying these phenomena are not well understood. Potential mechanism underlying functional recovery after brain ischemia in aged subjects include neuroinflammation, changes in brain plasticity-promoting factors, unregulated expression of neurotoxic factors, or differen
This unit describes two methods of in situ hybridization: one uses an 35S-labeled oligonucleotide probe and the other uses a digoxigenin-labeled oligonucleotide probe on frozen, cryostat-sectioned samples. These methods allow detection of the physical distribution and expression levels of target mRNA. Protocols are also included for labeling the probes and preparing the sample material.
Seizure activity regulates gene expression for glial cell line-derived neurotrophic factor (GDNF) and neurturin (NRTN), and their receptor components, the transmembrane c-Ret tyrosine kinase and the glycosylphosphatidylinositol-anchored GDNF family receptor (GFR) α1 and α2 in limbic structures. We demonstrate here that epileptogenesis, as assessed in the hippocampal kindling model, is markedly sup
Loss of function mutations in the gene encoding the cysteine protease inhibitor, cystatin B (CSTB), are responsible for the primary defect in human progressive myoclonus epilepsy (EPM1). CSTB inhibits the cathepsins B, H, L and S by tight reversible binding, but little is known regarding its localization and physiological function in the brain and the relation between the depletion of the CSTB pro
The levels of brain-derived neurotrophic factor (BDNF) vary between different forebrain areas and show region-specific changes after cerebral ischemia. The present study explores the possibility that the levels of endogenous BDNF determine the susceptibility to ischemic neuronal death. To block BDNF activity the authors used the TrkB-Fc fusion protein, which was infused intraventriculary in rats d
Expression of mRNAs for neuropeptide Y (NPY) and its receptor subtypes Y1 (Y1-R), Y2 (Y2-R) and Y5 (Y5-R) was studied in adult rat brain using in situ hybridization after 40 rapidly recurring seizures induced with 5-min interval by hippocampal kindling stimulations. At 2-4 h post-seizure, NPY mRNA levels were markedly elevated in dentate granule cells, CA1 and CA3 pyramidal layers, amygdala and pi
Neural stem cell lines represent a homogeneous source of cells for genetic, developmental, and gene transfer and repair studies in the nervous system. Since both gene transfer of neurotrophic factors and cell replacement strategies are of immediate interest for therapeutical purposes, we have generated BDNF-secreting neural stem cell lines and investigated to what extent different endogenous level
Cellular localization and tissue levels of BDNF protein were studied using immunocytochemistry and enzyme immunoassay, respectively, in the cortex and striatum at different reperfusion times (0-24 h) after 2 h of unilateral middle cerebral artery occlusion (MCAO) in rats. The distribution of neuronal injury was analyzed in NeuN-, cresyl violet-, and Fluoro-Jade-stained sections. At 2 h postischemi
Cajal-Retzius (CR) cells of the cerebral cortex express receptors for the neurotrophin brain-derived neurotrophic factor (BDNF) and downregulate expression of the extracellular matrix protein Reelin during early postnatal development, coincident with the onset of cortical BDNF expression. During this period, mice lacking BDNF have elevated levels of Reelin in CR cells. Acute BDNF stimulation of co
Expression of p75 neurotrophin receptor and survival of medium-sized spiny projection neurons and cholinergic interneurons in the rat striatum were studied using immunocytochemistry at different times after transient, unilateral middle cerebral artery occlusion. Thirty minutes of middle cerebral artery occlusion caused a major loss of projection neurons, identified by their immunoreactivity to dop
Preischemic hyperglycemia or superimposed hypercapnia exaggerates brain damage caused by transient forebrain ischemia. Because high regional levels of brain-derived neurotrophic factor (BDNF) protein correlate with resistance to ischemic damage, we studied the expression of BDNF mRNA using in sire hybridization in rats subjected to 10 minutes of forebrain ischemia under normoglycemic, hyperglycemi
The suspension of embryonic locus coeruleus (LC) was transplanted into outbred albino rat hippocampus after its preliminary 6-hydroxy-dopamine-induced denervation. Immunohistochemical and morphometric analysis revealed that 3 months after the transplantation, embryonic noradrenergic LC cells which have completed their histogenesis in recipient hippocampus, appear as differentiated multipolar and f
Brain-derived neurotrophic factor (BDNF), neurotrophin-3 (NT-3), and platelet-derived growth factor (PDGF) exert trophic effects on striatal neurons in vitro, which raises the possibility that these growth factors might also counteract neuronal death provoked by various insults. We have found that BDNF and NT-3, but neither PDGF-AA nor -BB, added 24 h before the insult ameliorated hypoglycemic neu
