advances in the analysis of pharmaceuticals in the aquatic environment
Fate of Pharmaceuticals in the Environment and in Water Treatment Systems - Chapter 4 potx
... degraders in the aquatic environment, thus lowering the exposure with introduced contaminants Furthermore, some of the microorganisms (bluegreen algae) also represent the trophic level of producers The ... within 10 days The degradation of the reference substances fulfilled the quality criteria set by the guidelines (i.e., the inoculum was viable and active) The elimination of organic carbon in the ... effects of contaminants on the aquatic environment, a battery of selected organisms, each representing a specific level of the aquatic ecosystem (see Figure 4.1), is investigated Furthermore, in order...
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Báo cáo hóa học: " Carbon-coated iron oxide nanoparticles as contrast agents in magnetic resonance imaging" potx
... the nuclear spins of the protons in the water molecules in the area of interest Under a given external magnetic field (B), the nuclear spins of the protons align with the field, giving rise to ... and put them into microfuge tubes for imaging One example of the MR images is shown in Figure In MRI, the signal recorded during the scan is related to the magnetic relaxation processes of the nuclear ... along the B direction, and the spin-spin relaxation process (T2), i.e., the loss of signal in the perpendicular plane The presence of nanoparticles in the area of interest creates an additional...
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Formulation of superparamagnetic iron oxides by nanoparticles of biodegradable polymer for magnetic resonance imaging (MRI)
... and the diffusion of the water molecules in the surrounding medium Depending on the rate of diffusion of the water molecules and the size of IOs, they can be operating in the MAR or SDR MAR In the ... direction of the spins rather than flipping them over to the other side of the XY plane Gradient refocusing of the spins takes considerably less time than 180 o RF pulse refocusing The disadvantage of ... [10] Two main factors that influence the relaxation rates are the magnetization of the IOs and the diffusion of the water molecules in the surrounding medium The magnetization of the IOs is directly...
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Báo cáo y học: "Voxel-based structural magnetic resonance imaging (MRI) study of patients with early onset schizophrenia" potx
... symptom rating scale in the early onset schizophrenia group The left side of the figure represents the right side of the brain; the z coordinate for each axial slice in the standard space of Talairach ... showing dysregulation of dopaminergic transmission in the midbrain in schizophrenia [48] In our sample of EOS patients, the brain region that was found to be associated with the severity of the ... denote areas of grey matter deficits in the early onset schizophrenia group relative to the control group The left side of the figure represents the right side of the brain; the z coordinate for...
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Báo cáo y học: "Cartilage markers and their association with cartilage loss on magnetic resonance imaging in knee osteoarthritis: the Boston Osteoarthritis Knee Study" doc
... progression MRI of the knee has the advantage of covering the whole joint in one examination, meaning that the cartilage defects in the joint can be visualized directly, regardless of their location ... study sponsor was not involved in the study design; in the collection, analysis, and interpretation of data; in the writing of the report; or in the decision to submit the paper for publication ... relation of levels of each logarithmic transformed biomarker to the risk of cartilage loss in any plate Cartilage loss in a knee was defined as an increase in cartilage score in any of the 14 subregions...
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Magnetic resonance imaging techniques for contrast enhanced cellular and molecular imaging
... owing to the unique cellular composition and structure of the pancreas The pancreas consists of the endocrine and exocrine glands, consisting of the islets of Langerhans and the pancreatic acini, ... based on the interaction of nuclear spins with an external field The dominant nucleus in MRI is the proton in hydrogen and its interaction with the external field results in precession of the proton ... optimize the use of biomarkers in the development and evaluation of novel therapies (55) Since biomarkers are usually the intermittent or end products of a pathological signaling pathway, they are often...
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Báo cáo y học: "Autologous chondrocyte implantation for cartilage repair: monitoring its success by magnetic resonance imaging and histology" ppt
... obviously influence the MRIs of that joint, often rendering their interpretation more difficult – for example, in defining the edge of the graft to assess the degree of overgrowth or incorporation The ... the integrity and contour of the articulating surface, the degree of metachromasia with safranin O staining, the extent of chondrocyte cluster formation, the presence of vascularisation or mineralisation ... intervals of 76 and 110 days On MRI, the thickness of the graft cartilage appeared the same as that of the adjacent cartilage in 68% of patients The surface of the articular cartilage was smooth in...
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báo cáo khoa học: " N-hexanoyl chitosan stabilized magnetic nanoparticles: Implication for cellular labeling and magnetic resonance imaging" pps
... pattern of MC-IOPs, which is in exact/or in good agreement with the XRD results The ring type SAD pattern consists of a cubic inverse spinal structure of magnetite and it indicates good crystalinity ... polymer of MC being a polycation gives different +ve ζpotential depending on the pH of the media The ζ-potential of the MC was decreased at pH 7.4 after incorporation of IOPs However, the ζ-potential ... showing a successful synthesis of magnetic MC-IOPs The results of dynamic light scattering (DLS) measurements showed a uni-model size distribution of the nanoparticles The average sizes of the...
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Báo cáo y học: "Cerebral misery perfusion diagnosed using hypercapnic blood-oxygenation-level-dependent contrast functional magnetic resonance imaging: a case report" potx
... are obtained during periods of normocapnia and hypercapnia (during inhalation of 10% CO2) Using these images, CVR maps are generated, where an increase in BOLD signal is used as a marker of cerebral ... institution The use of this technique has been validated in volunteers and, increasingly, in patients [6] The result of this scan showed a marked impairment in our patient’s CO2 reactivity in the hemisphere ... analyses evaluating the efficacy of the procedure in patients with radiologically confirmed CMP The data from STLCOS regarding the prognosis in misery perfusion and emerging imaging techniques...
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Báo cáo y học: "Diffusion-weighted magnetic resonance imaging for predicting the clinical outcome of comatose survivors after cardiac arrest: a cohort study" pptx
... imaging (MRI), is useful in assessing the extent of structural brain injury Yet, evaluating hypoxic ischemic brain injury with CT or conventional MRI often underestimates the actual extent of injury ... assessment of the severity of brain damage by means of measuring the apparent diffusion coefficient (ADC) [9-12] The patterns and extent of brain injury seen in DWI are associated with clinical outcomes ... nuclei injuries The ADC values were only obtained from 22 patients who were examined using the GE Signa Excite due to the use of two kinds of MR scanners On the workstation, the ADC value of each...
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Microgel iron oxide nanoparticles for tracking of stem cells through magnetic resonance imaging
... activity coincides with lengthening of telomeres by enzymes, thereby maintaining self-renewal of cells such as the ESC 30 Introduction 1.2.4 Homing and Migration There has been emerging evidence ... 2006) in the infarct periphery Given the therapeutic effects of early intravascular delivery and graft survival of late intracerebral injection, the optimal delivery timing or the effects of multiple ... deliveries remain to be determined 48 Introduction 1.3 Monitoring of Cell Therapy While the therapeutic capability of cell therapy is under investigation, knowledge of the whereabouts of transplanted...
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Tài liệu Magnetic resonance imaging and gynecological devices doc
... dislocation, torsion or overheating of these devices, which in turn can provoke injuries [8] Any complaint of pelvic pain should result in the immediate suspension of the exam The most common, though ... losses of signal in the initial part of the tubes and in the uterine cornu region [15] 3.2.3 Contraceptive implant The Implanon® (Organon USA Inc.) is a contraceptive implant approved by the FDA in ... interpretation of the collected images [8,10] IUDs are captured in MR images as no-signal zones inside the uterine cavity, assuming different structures according to the type of analyzed IUD and the cutting...
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Tài liệu Functional Magnetic Resonance Imaging – Advanced Neuroimaging Applications Edited by Rakesh Sharma doc
... eye, forming the optic nerve and synapse in the midbrain Since the diameter of the optic nerve and the number of the ganglion cell axons it contains are limited by the structure of the skull, ... up in a "retinotopic" fashion; meaning that the order of points on the retina (proximal stimulus) are preserved In this mapping, the points that are further away from each other on the retina ... physics in order to appreciate the complexities and intricacies of the process This in turn would help minimize errors and confounds in the results The main limitations of interpretation lies in the...
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Báo cáo hóa học: " Adenoviruses with an avb integrin targeting moiety in the fiber shaft or the HI-loop increase tumor specificity without compromising antitumor efficacy in magnetic resonance imaging of colorectal cancer metastases" pdf
... HI loop of the fiber knob (Ad5lucRGD) or into the fiber shaft KKTK domain (AdTLRGDK) increased the expression of transgene in all tested cell lines in comparison with AdTL Interestingly, the optimal ... transcriptional targeting) to increase tumor specificity of these viruses before testing these constructs in humans In this study, the feasibility of using MRI analysis for following tumor growth ... forming unit incision Tumors were established by intrasplenic injection of × 10e6 HCT116 cells suspended in 50 μl of serum-free growth media using a 27-gauge needle The injection site of the...
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báo cáo hóa học:" Dynamic magnetic resonance imaging in assessing lung function in adolescent idiopathic scoliosis: a pilot study of comparison before and after posterior spinal fusion" doc
... carried out the analysis of data and wrote the manuscript; AML and TPL contributed to the editing of the manuscript, clinical recruitment and assessment; WWML participated in the editing of the manuscript; ... highlight the air in green (lung) (b) The total lung volume is calculated by summating the volume of all coronal sections of the lungs from the front to the back of the body Surgical procedures in all ... Chicago, Illinois) was used in the analysis Results The spatial resolution of the reformatted axial and coronal images of the chest was considered to be of diagnostic quality in all subjects The fast...
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Báo cáo hóa học: "Research Article Independent Component Analysis for Magnetic Resonance Image Analysis" pot
... only the GM and WM were considered and the CSF was not included for analysis in [18] The difficulty of analyzing the CSF in [18] may have resulted from the inability of UC-ICA in dealing with insufficient ... of the decision surface specified by the hyperplane On the other hand, if ξ i > 1, the ith data sample vector x i falls on the wrong side of its decision surface In light of the mathematical interpretation, ... inevitable phenomenon is caused by the use of random initial projection vectors by the ICA and the lack of ICs resulting from the inherent nature in the OC-ICA In order to resolve this dilemma,...
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Pocket Atlas of Sectional Anatomy Computed Tomography and Magnetic Resonance Imaging - Volume II Thorax, Heart, Abdomen, and Pelvis (Part 1 ) pptx
... subject to terms and conditions of license 84 132 150 162 164 166 168 Contents VIII Pelvis MRI MRI MRI MRI MRI MRI MRI of of of of of of of the the the the the the the Female Pelvis—Axial ... imaging (MRI) have attained a recognized value in the diagnosis of the heart, which is continuing to increase For this reason, we have now provided a separate chapter on diagnostic imaging of the ... accordance with the state of knowledge at the time of production of the book Nevertheless, this does not involve, imply, or express any guarantee or responsibility on the part of the publishers in respect...
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Pocket Atlas of Sectional Anatomy Computed Tomography and Magnetic Resonance Imaging - Volume II Thorax, Heart, Abdomen, and Pelvis (Part 2 ) doc
... hepatic vein Left branch of portal vein Right branch of portal vein Left hepatic vein Intermediate hepatic vein Splenic vein Portal vein Superior mesenteric vein Jejunal and ileal veins Moeller, ... Stomach Transverse colon Small intestine External abdominal oblique muscle Transversus abdominis muscle Descending colon Internal abdominal oblique muscle Iliac spine Iliacus muscle Lung Latissimus ... (T10) Spinous process Hepatic portal vein Inferior vena cava Inferior mesenteric artery Anterior longitudinal ligament Thoracolumbar fascia Intervertebral disk (L1−L2) Cauda equina Spinal dura...
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