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https://www.readbyqxmd.com/read/29778082/a-review-of-the-impacts-of-tobacco-heating-system-on-indoor-air-quality-versus-conventional-pollution-sources
#1
REVIEW
Violeta Kaunelienė, Marija Meišutovič-Akhtarieva, Dainius Martuzevičius
With the introduction of novel and potentially less polluting nicotine containing products to the market, the impacts of their usage to indoor air quality as opposed to conventional pollution sources must be reviewed and considered. This review study aimed to comparatively analyse changes in indoor air quality as the consequence of tobacco heating system (THS) generated pollution against general indoor air quality in various micro-environments, especially with combustion-based pollution sources present. Indoor concentrations of formaldehyde, acetaldehyde, benzene, toluene, nicotine and PM2...
May 8, 2018: Chemosphere
https://www.readbyqxmd.com/read/29778072/nmr-at-pressures-up-to-90-gpa
#2
Thomas Meier, Saiana Khandarkhaeva, Sylvain Petitgirard, Thomas Körber, Alexander Lauerer, Ernst Rössler, Leonid Dubrovinsky
The past 15 years have seen an astonishing increase in Nuclear Magnetic Resonance (NMR) sensitivity and accessible pressure range in high-pressure NMR experiments, owing to a series of new developments of NMR spectroscopy applied to the diamond anvil cell (DAC). Recently, with the application of electro-magnetic lenses, so-called Lenz lenses, in toroidal diamond indenter cells, pressures of up to 72 GPa with NMR spin sensitivities of about 1012  spin/Hz1/2 has been achieved. Here, we describe the implementation of a refined NMR resonator structure using a pair of double stage Lenz lenses driven by a Helmholtz coil within a standard DAC, allowing to measure sample volumes as small as 100 pl prior to compression...
May 14, 2018: Journal of Magnetic Resonance
https://www.readbyqxmd.com/read/29777889/endovascular-management-of-a-ruptured-basilar-perforator-artery-aneurysm-associated-with-a-pontine-arteriovenous-malformation-a-case-report-and-review-of-the-literature
#3
Joseph Lockwood, Tyler Scullen, Mansour Mathkour, Ascher Kaufmann, Ricky Medel, Aaron S Dumont, Peter S Amenta
BACKGROUND: Arteriovenous malformation (AVM)-associated aneurysms are common, being reported in 15% of cases. In regards to ruptured posterior fossa AVMs, associated aneurysms are present in 48% of cases and are the etiology of the bleed in 37%. We present a 75 year-old female who presented with a subarachnoid hemorrhage (SAH) secondary to a ruptured aneurysm arising from a flow-related basilar perforator artery feeder of an anterior pontine AVM. We report the successful treatment of the aneurysm with coil embolization...
May 16, 2018: World Neurosurgery
https://www.readbyqxmd.com/read/29777888/primary-intracranial-rhabdomyosarcoma-in-the-cerebellopontine-angle-resected-after-preoperative-embolization
#4
Keisuke Yoshida, Tomoru Miwa, Takenori Akiyama, Masaaki Nishimoto, Dai Kamamoto, Kazunari Yoshida
BACKGROUND: Primary intracranial rhabdomyosarcoma is a very rare malignant tumor. Due to moderately vascular and firm characteristics of the tumor, complete removal without complications is often difficult. Moreover, in pediatric patients, the volume of total blood is less than adults and minimal intraoperative hemorrhage is desirable. CASE DESCRIPTION: A 6-year-old boy presented with ataxia and was found to have a large cerebellopontine angle tumor and hydrocephalus...
May 16, 2018: World Neurosurgery
https://www.readbyqxmd.com/read/29776934/coiling-of-ruptured-wide-necked-basilar-tip-aneurysm-using-double-comaneci-technique
#5
Stanimir S Sirakov, Alexander Sirakov, Hristo Hristov, Radoslav Raychev
In this report, we present a novel technique of successful coil embolisation using temporary deployment of two Comaneci devices placed in Y configuration across a wide-neck ruptured basilar tip aneurysm. The placement of two devices across the wide aneurysm neck allowed optimal coverage for safe coil delivery, while maintaining parent vessel patency. This case highlights the unique and safe applicability of two crossed Comaneci devices in a ruptured aneurysm with unfavourable anatomy, ultimately resulting in complete aneurysm obliteration...
May 18, 2018: BMJ Case Reports
https://www.readbyqxmd.com/read/29776642/blunt-splenic-injury-during-colonoscopy-is-it-as-rare-as-we-think
#6
Erin G Andrade, Olubode A Olufajo, Eleanor L Drew, Grant V Bochicchio, Laurie J Punch
BACKGROUND: Post colonoscopy blunt splenic injury (PCBSI) is a rarely reported and poorly recognized event. We analyzed cases of PCBSI managed at our hospital and compared them to existing literature. METHODS: We identified 5 patients admitted with PCBSI through chart review. RESULTS: There were 5 cases of PCBSI identified from April 2016-July 2017. Four of the patients were older than 65 years, three had prior surgeries, and all were women...
May 12, 2018: American Journal of Surgery
https://www.readbyqxmd.com/read/29776369/prevention-and-treatment-of-malaria-in-pregnancy-what-do-pregnant-women-and-health-care-workers-in-east-india-know-and-do-about-it
#7
Lora Sabin, Evan M S Hecht, Mohamad I Brooks, Mrigendra P Singh, Kojo Yeboah-Antwi, Abanish Rizal, Blair J Wylie, Philip A Bondzie, Matthew Banos, Jordan Tuchman, Neeru Singh, Davidson H Hamer
BACKGROUND: Limited qualitative research has been performed in India to investigate views and behaviours of pregnant women regarding malaria despite the threat of malaria-related adverse maternal and neonatal outcomes. To address this gap, a comprehensive study on malaria prevention and treatment attitudes, knowledge and behaviour among pregnant women in India was conducted. METHODS: Pregnant women and healthcare workers (HCWs), encompassing clinic-based providers, traditional birth attendants, and auxiliary nurse-midwives were enrolled for in-depth interviews (IDIs) at 7 hospital sites and nearby communities in Jharkhand and Chhattisgarh States...
May 18, 2018: Malaria Journal
https://www.readbyqxmd.com/read/29775839/veterinary-applications-of-pulsed-electromagnetic-field-therapy
#8
REVIEW
James S Gaynor, Sean Hagberg, Blake T Gurfein
Pulsed electromagnetic field (PEMF) therapy can non-invasively treat a variety of pathologies by delivering electric and magnetic fields to tissues via inductive coils. The electromagnetic fields generated by these devices have been found to affect a variety of biological processes and basic science understanding of the underlying mechanisms of action of PEMF treatment has accelerated in the last 10 years. Accumulating clinical evidence supports the use of PEMF therapy in both animals and humans for specific clinical indications including bone healing, wound healing, osteoarthritis and inflammation, and treatment of post-operative pain and edema...
May 7, 2018: Research in Veterinary Science
https://www.readbyqxmd.com/read/29775770/treatment-of-ruptured-vertebral-artery-dissection-and-abdominal-hemorrhage-associated-with-segmental-arterial-mediolysis-using-endovascular-coil-embolization-va-dissection-associated-with-sam
#9
Taiki Isaji, Tomotaka Ohshima, Sigeru Miyachi, Naoki Matsuo, Reo Kawaguchi, Masakazu Takayasu
BACKGROUND: Segmental arterial mediolysis is a rare disease characterized by idiopathic noninflammatory vasculopathy involving small to medium arteries. Here, we report a case of ruptured cerebral and abdominal aneurysms, which were successfully treated using emergency endovascular coil embolization. CASE DESCRIPTION: A 45-year-old male suffered subarachnoid hemorrhage caused by the rupture of the right vertebral artery dissecting aneurysm, which was treated using emergency endovascular coiling...
May 15, 2018: World Neurosurgery
https://www.readbyqxmd.com/read/29774173/role-of-interventional-radiology-in-the-management-of-peripheral-vascular-malformations-a-tertiary-care-center-experience
#10
Misbah Tahir, Muhammad Anees Mumtaz, Anum Sultan, Jawaid Iqbal, Raza Sayani
Peripheral vascular malformations (PVMs) represent a wide spectrum of vascular abnormalities occurring due to anomalous connections between arteries, veins, capillaries, and lymphatic channels at the microscopic level, in different combinations. They are rare and challenging to treat. Different operators may have different approaches based on their experience and expertise. Sclerotherapy either alone or in combination with embolization has been used as an independent method for the treatment of PVMs. Purpose The aim of this study is to assess the safety and efficacy of sclerotherapy and embolization, with or without surgery, for the treatment of peripheral vascular malformations, based on our approach...
March 16, 2018: Curēus
https://www.readbyqxmd.com/read/29773714/the-bendy-basilar-progressive-aneurysm-tilting-and-arterial-deformation-can-be-a-delayed-outcome-after-coiling-of-large-basilar-apex-aneurysms
#11
Ansaar T Rai, Abdul R Tarabishy, SoHyun Boo, Jeffrey S Carpenter, Sanjay Bhattia
BACKGROUND: Morphological changes in the basilar artery and the artery-aneurysm relationship following coiling of large basilar apex aneurysms may induce morbidity. METHODS: The basilar artery radius-of-curvature was measured along its center line on volumetrically reconstructed images formatted along the plane of curvature. The aneurysm-tilt-angle was measured between the distal basilar and the vertical long axis of the aneurysm. The measurements were compared between small (<10 mm) and large (≥10 mm) aneurysms on baseline and follow-up studies...
May 17, 2018: Journal of Neurointerventional Surgery
https://www.readbyqxmd.com/read/29771510/relevance-of-the-speed-and-direction-of-pulling-in-simple-modular-proteins
#12
Carlos A Plata, Zackary N Scholl, Piotr E Marszalek, Antonio Prados
A theoretical framework capable of predicting the first unit that unfolds in pulled modular proteins has been recently introduced, for "fast enough" pulling velocities. Within this picture, we investigate the unfolding pathway in a chain of identical units and predict that the module closest to the pulled end opens first. Steered molecular dynamics of a simple construct, specifically a chain composed of two coiled-coil motives, shows that this is indeed the case. Notwithstanding, the unfolding behavior strongly depends on the terminus (C or N) from which this homopolyprotein is pulled...
May 17, 2018: Journal of Chemical Theory and Computation
https://www.readbyqxmd.com/read/29771498/structure-and-function-of-the-transmembrane-domain-of-nsas-an-antibiotic-sensing-histidine-kinase-in-s-aureus
#13
Manasi P Bhate, Thomas Lemmin, Georg Kuenze, Bruk Mensa, Soumya Ganguly, Jason Peters, Nathan Schmidt, Jeffrey G Pelton, Carol Gross, Jens Meiler, William F DeGrado
NsaS is one of four intramembrane histidine kinases (HKs) in Staphylococcus aureus that mediate the pathogen's response to membrane active antimicrobials and human innate immunity. We describe the first integrative structural study of NsaS using a combination of solution state NMR spectroscopy, chemical-crosslinking, molecular modeling and dynamics. Three key structural features emerge: First, NsaS has a short N-terminal amphiphilic helix that anchors its transmembrane (TM) bundle into the inner leaflet of the membrane such that it might sense neighboring proteins or membrane deformations...
May 17, 2018: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/29771238/on-the-direct-acquisition-of-beam-s-eye-view-images-in-mri-for-integration-with-external-beam-radiotherapy
#14
Keith Wachowicz, Brad Murray, B Gino Fallone
The recent interest in the integration of external beam radiotherapy with a magnetic resonance (MR) imaging unit offers the potential for real-time adaptive tumour tracking during radiation treatment. The tracking of large tumours which follow a rapid trajectory may best be served by the generation of a projection image from the perspective of the beam source, or "beam's eye view" (BEV). This type of image projection represents the path of the radiation beam, thus enabling rapid compensations for target translations, rotations and deformations, as well time-dependent critical structure avoidance...
May 17, 2018: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/29770991/probing-the-interaction-of-l-captopril-with-metallo-%C3%AE-lactamase-ccra-by-fluorescence-spectra-and-molecular-dynamic-simulation
#15
Penghui Shi, Yan Zhang, Yuhua Li, Liujiao Bian
Both the molecular recognition and interaction of metallo-β-lactamase CcrA with l-captopril were studied by the combined use of fluorescence spectra and molecular dynamic simulation. The results showed that the binding constant was 8.89 × 104  L mol-1 at 296 K. Both Zn1 and Zn2 displayed tetrahedral coordination geometries in the CcrA-Lcap complex, the S atom in l-captopril displaced the nucleophilic hydroxide in apo CcrA and occupied the fourth coordination site for each ion, resulting in a competitively inhibited CcrA enzyme...
May 17, 2018: Luminescence: the Journal of Biological and Chemical Luminescence
https://www.readbyqxmd.com/read/29769457/3d-cones-acquisition-of-human-extremity-imaging-using-a-1-5t-superconducting-magnet-and-an-unshielded-gradient-coil-set
#16
Ayana Setoi, Katsumi Kose
We developed ultrashort echo-time (UTE) imaging sequences with 3D Cones trajectories for a home-built compact MRI system using a 1.5T superconducting magnet and an unshielded gradient coil set. We achieved less than 7 min imaging time and obtained clear in vivo images of a human forearm with a TE of 0.4 ms. We concluded that UTE imaging using 3D Cones acquisition was successfully implemented in our 1.5T MRI system.
May 16, 2018: Magnetic Resonance in Medical Sciences: MRMS
https://www.readbyqxmd.com/read/29769011/evolving-strategies-for-the-treatment-of-t-cell-lymphoma-a-systematic-review-and-recent-patents
#17
Kamel Laribi, Mustapha Alani, Catherine Truong, Alix Baugier de Materre
OBJECTIVE: Mature T-cell lymphomas are a heterogeneous group of T-cell malignancies with a poor outcome. The discovery of new molecular biomarkers has led to the emergence of new drugs in recent years that target various signaling pathways. METHOD: We examined all pertinent published patents through 2015 that analyzed novel methods for the diagnosis and treatment of T cell lymphoma, as well as related published and unpublished studies. Selection criteria were established before data collection...
May 16, 2018: Recent Patents on Anti-cancer Drug Discovery
https://www.readbyqxmd.com/read/29768963/the-woven-endobridge-web-as-primary-treatment-for-unruptured-intracranial-aneurysms
#18
Sanne Bt van Rooij, Willem Jan van Rooij, Jo P Peluso, Menno Sluzewski
Purpose The intrasaccular flow disruptor Woven EndoBridge (WEB) device is developed for the treatment of wide-necked aneurysms without supportive devices. We used the WEB as primary treatment for unruptured aneurysms suitable for the device, regardless of neck size. Methods Between February 2015 and June 2017, 59 aneurysms in 51 patients were selectively treated with the WEB. There were 15 men and 36 women with a mean age of 59 years. Mean aneurysm size was 7.0 mm (range 3-22 mm). Of 59 aneurysms, 45 (76%) had a wide neck defined as ≥4 mm or dome-neck ratio ≤1...
January 1, 2018: Interventional Neuroradiology
https://www.readbyqxmd.com/read/29766010/single-stage-endovascular-treatment-of-a-penetrating-aortic-ulcer-with-a-concomitant-isolated-iliac-aneurysm
#19
Haidi Hu, Jianming Guo, Hualong Bai, Alan Dardik
Penetrating aortic ulcer (PAU) is an acute aortic syndrome that can proceed to life-threatening aortic dissection or even aortic rupture. Isolated iliac aneurysms are relatively rare and often asymptomatic due to their deep pelvic location but are frequently associated with high mortality with rupture. We report a case of a 68-year-old man with a symptomatic penetrating ulcer in the descending aorta and an asymptomatic right iliac aneurysm involving the common and internal iliac arteries. The patient was successfully treated by endovascular repair in a single-stage manner using stent grafts in the descending aorta and right common iliac artery after coil embolization of the right internal iliac artery...
December 2017: Aorta (Stamford, Conn.)
https://www.readbyqxmd.com/read/29766009/persistent-buttock-claudication-after-endovascular-abdominal-aortic-aneurysm-repair
#20
Alessandro Robaldo, Stefano Pagliari, Filippo Piaggio, Patrizio Colotto
We describe the successful surgical treatment of a 71-year-old man affected by right buttock claudication after a right internal iliac artery (IIA) coil embolization as an adjunct to endovascular iliac artery aneurysm repair. Computed tomography angiography revealed extensive aortoiliac calcifications and thrombus in the vessel walls. Despite patency of the contralateral IIA and preservation of right distal collateral flow through ipsilateral hypogastric branches, the symptom was persistent and disabling. The high-risk patient underwent an "open" repair of the infrarenal abdominal aneurysm with removal of the entire stent-graft and concomitant revascularization of the right IIA...
December 2017: Aorta (Stamford, Conn.)
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