keyword
MENU ▼
Read by QxMD icon Read
search

sami

keyword
https://www.readbyqxmd.com/read/28103042/mechanistic-investigations-of-reactions-of-the-frustrated-lewis-pairs-triarylphosphines-b-c6f5-3-with-michael-acceptors
#1
Jonathan Dupré, Annie-Claude Gaumont, Sami Lakhdar
Frustrated Lewis pair (FLP)-catalyzed reduction of Michael acceptors is a challenging reaction that proceeds with specific FLP structures. Kinetics and equilibrium of the reactions of two phosphines (Ar3P), namely tri(1-naphthyl)phosphine and tri(o-tolyl)phosphine, are reported with reference electrophiles. The reason for the failure of the FLPs (Ar3P/B(C6F5)3) to reduce activated alkenes under H2 pressure is shown to be a hydrophosphination process that inhibits the reduction reaction. Kinetic and thermodynamic factors controlling both pathways are discussed in light of Mayr's free linear energy relationships...
January 19, 2017: Organic Letters
https://www.readbyqxmd.com/read/28102635/characterization-of-an-emirati-tmem138-mutation-leading-to-joubert-syndrome
#2
Sami Bizzari, Abdul Rezzak Hamzeh, Pratibha Nair, Madiha Mohamed, Fatma Bastaki
No abstract text is available yet for this article.
January 2017: Pediatrics International: Official Journal of the Japan Pediatric Society
https://www.readbyqxmd.com/read/28100643/fluid-shear-stress-increases-transepithelial-transport-of-ca2-in-ciliated-distal-convoluted-and-connecting-tubule-cells
#3
Sami G Mohammed, Francisco J Arjona, Femke Latta, René J M Bindels, Ronald Roepman, Joost G J Hoenderop
In kidney, transcellular transport of Ca(2+) is mediated by transient receptor potential vanilloid 5 and Na(+)-Ca(2+) exchanger 1 proteins in distal convoluted and connecting tubules (DCT and CNT, respectively). It is not yet understood how DCT/CNT cells can adapt to differences in tubular flow rate and, consequently, Ca(2+) load. This study aims to elucidate the molecular mechanisms by which DCT/CNT cells sense fluid dynamics to control transepithelial Ca(2+) reabsorption and whether their primary cilia play an active role in this process...
January 18, 2017: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://www.readbyqxmd.com/read/28100024/evaluation-of-cast-re-orientation-on-a-dental-surveyor-using-three-tripod-techniques-a-survey-and-in-vitro-study
#4
Mohammed E Sayed, Idris A Busaily, Rana J Nahari, Ruaa O Hakami, Sami M Maashi, Naveen R Ramireddy
PURPOSE: To survey different educational levels (i.e., students, interns, technicians, and prosthodontic faculty) with regard to their opinions, attitudes, and adoption of three selected tripod techniques. The study will also investigate the accuracy of these techniques to reposition casts on the dental surveyor in anterio-posterior (AP) and lateral directions at both technique and educational levels. MATERIALS AND METHODS: Tripod points, scored lines, and cemented post tripod techniques were used in this study...
January 18, 2017: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/28099846/cell-of-origin-links-histotype-spectrum-to-immune-microenvironment-diversity-in-non-small-cell-lung-cancer-driven-by-mutant-kras-and-loss-of-lkb1
#5
Ashwini S Nagaraj, Jenni Lahtela, Annabrita Hemmes, Teijo Pellinen, Sami Blom, Jennifer R Devlin, Kaisa Salmenkivi, Olli Kallioniemi, Mikko I Mäyränpää, Katja Närhi, Emmy W Verschuren
Lung cancers exhibit pronounced functional heterogeneity, confounding precision medicine. We studied how the cell of origin contributes to phenotypic heterogeneity following conditional expression of Kras(G12D) and loss of Lkb1 (Kras;Lkb1). Using progenitor cell-type-restricted adenoviral Cre to target cells expressing surfactant protein C (SPC) or club cell antigen 10 (CC10), we show that Ad5-CC10-Cre-infected mice exhibit a shorter latency compared with Ad5-SPC-Cre cohorts. We further demonstrate that CC10(+) cells are the predominant progenitors of adenosquamous carcinoma (ASC) tumors and give rise to a wider spectrum of histotypes that includes mucinous and acinar adenocarcinomas...
January 17, 2017: Cell Reports
https://www.readbyqxmd.com/read/28098917/tanning-equipment-use-2014-canadian-community-health-survey
#6
Sami Q Qutob, Michelle O'Brien, Katya Feder, James McNamee, Mireille Guay, John Than
BACKGROUND: Tanning equipment use is related to the early onset of cancer, with the risk increasing as the duration and repetition of exposure increase. In 2009, the International Agency for Research on Cancer classified tanning equipment use as carcinogenic to humans, and according to the World Health Organization, the risk of skin melanoma increases significantly when use begins before age 35. DATA AND METHODS: The rapid response component of the 2014 Canadian Community Health Survey collected data on the use of tanning equipment in the previous 12 months, including reasons for use, frequency/duration of use, precautions taken, and adverse reactions or injuries...
January 18, 2017: Health Reports
https://www.readbyqxmd.com/read/28098525/genetic-diversity-and-new-lineages-of-dengue-virus-serotypes-3-and-4-in-returning-travelers-germany-2006-2015
#7
Sami Shihada, Petra Emmerich, Corinna Thomé-Bolduan, Stephanie Jansen, Stephan Günther, Christina Frank, Jonas Schmidt-Chanasit, Daniel Cadar
During 2006-2015, we analyzed 70 dengue virus (DENV) strains isolated from febrile travelers returning to Germany. High genetic diversity, including multiple co-circulating DENV lineages and emerging new lineages of DENV-3 and DENV-4, was demonstrated. Our passive surveillance system based on returning travelers yielded substantial information on DENV diversity.
February 2017: Emerging Infectious Diseases
https://www.readbyqxmd.com/read/28097733/optimized-amplitude-modulated-multiband-rf-pulse-design
#8
Samy Abo Seada, Anthony N Price, Joseph V Hajnal, Shaihan J Malik
PURPOSE: Multiband pulses are characterized by highly temporally modulated waveforms. Rapid phase or frequency modulation can be extremely demanding on the performance of radiofrequency (RF) pulse generation, which can lead to errors that can be avoided if pulses are restricted to amplitude modulation (AM) only. In this work, three existing multiband pulse design techniques are modified to produce AM waveforms. THEORY AND METHODS: Multiband refocusing pulses were designed using phase optimization, time shifting, and root flipping...
January 17, 2017: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/28096928/spontaneous-uretero-sigmoid-fistula-secondary-to-calculus
#9
Ines Marzouk, Makram Moussa, Lotfi Saadallah, Sami Bouchoucha, Lotfi Hendaoui
A 25-year-old man was referred to the urology department after a subacute history of left back pain, burning micturition associated with pneumaturia and fecaluria. Ultrasonography was performed showing hydronephrosis, and plain film radiography demonstrated a long vertical left pelvic calculi. Uro-computed tomography (CT) combined with a water enema CT showed a 10 cm long calculus with the cranial extremity fistulating the sigmoidal wall. Surgical treatment included left nephroureterectomy and sigmoidectomy with a colorectal anastomosis...
November 2016: Canadian Urological Association Journal, Journal de L'Association des Urologues du Canada
https://www.readbyqxmd.com/read/28095435/evaluation-of-a-silver-embedded-ceramic-tablet-as-a-primary-and-secondary-point-of-use-water-purification-technology-in-limpopo-province-s-africa
#10
Beeta Ehdaie, Chloe T Rento, Veronica Son, Sydney S Turner, Amidou Samie, Rebecca A Dillingham, James A Smith
The World Health Organization (WHO) recognizes point-of-use water treatment (PoUWT) technologies as effective means to improve water quality. This paper investigates long-term performance and social acceptance of a novel PoUWT technology, a silver-infused ceramic tablet, in Limpopo Province, South Africa. When placed in a water storage container, the silver-embedded ceramic tablet releases silver ions into water, thereby disinfecting microbial pathogens and leaving the water safe for human consumption. As a result of its simplicity and efficiency, the silver-embedded ceramic tablet can serve as a stand-alone PoUWT method and as a secondary PoUWT to improve exisitng PoUWT methods, such as ceramic water filters...
2017: PloS One
https://www.readbyqxmd.com/read/28093788/north-american-population-based-validation-of-the-national-comprehensive-cancer-network-practice-guideline-recommendation-of-pelvic-lymphadenectomy-in-contemporary-prostate-cancer
#11
Sami-Ramzi Leyh-Bannurah, Lars Budäus, Raisa Pompe, Emanuele Zaffuto, Alberto Briganti, Firas Abdollah, Francesco Montorsi, Jonas Schiffmann, Mani Menon, Shahrokh F Shariat, Margit Fisch, Felix Chun, Hartwig Huland, Markus Graefen, Pierre I Karakiewicz
BACKGROUND: National Comprehensive Cancer Network (NCCN) guidelines recommend a pelvic lymph node dissection (PLND) in prostate cancer (PCa) patients treated with radical prostatectomy (RP) if a nomogram predicted risk of lymph node invasion (LNI) is ≥2%. We examined this and other thresholds, including nomogram validation. METHODS: We examined records of 26,713 patients treated with RP and PLND between 2010 and 2013, within the Surveillance, Epidemiology, and End Results database...
January 17, 2017: Prostate
https://www.readbyqxmd.com/read/28093324/synthesis-characterization-and-in-vitro-antitumor-activity-of-the-polyethylene-glycol-350-and-1000-succinate-derivatives-of-the-tocopherol-and-tocotrienol-isomers-of-vitamin-e
#12
Ahmed Abu-Fayyad, Sami Nazzal
Vitamin E refers to a group of saturated tocopherol (T) isomers and the biologically more active unsaturated tocotrienol (T3) isomers. PEGylated α-tocopherol, commercially known as Vitamin E TPGS, has been used as an emulsifier and therapeutic agent for children with vitamin E deficiency. Limited information, however, is available about the PEG conjugates of the tocotrienol isomers of vitamin E. The current work was therefore undertaken to synthesize and characterize the water soluble polyethylene glycol (PEG 350 and 1000) derivatives of T and T3...
January 13, 2017: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/28093302/aging-and-risky-decision-making-new-erp-evidence-from-the-iowa-gambling-task
#13
Elisa Di Rosa, Daniela Mapelli, Giorgio Arcara, Piero Amodio, Stefano Tamburin, Sami Schiff
Several pieces of evidence have highlighted the presence of an age-related decline in risky decision-making (DM), but the reason of this decline is still unclear. The aim of the present study was to investigate the neural correlates of feedback processing in risky DM. Twenty-one younger (age <50 years) and 15 older (age >50 years) adults were tested with the Iowa Gambling Task (IGT) during Event Related Potentials (ERP) recording. The analysis was focused on the feedback-related negativity (FRN) and P3, two ERP components that represent different stages of feedback processing...
January 13, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/28091387/prevalence-of-intestinal-parasites-in-cats-and-their-importance-in-terms-of-public-health
#14
Umut Fikret Korkmaz, Sami Gökpınar, Kader Yıldız
OBJECTIVE: This study aimed to detect the prevalence of intestinal parasites in cats by fecal examination. METHODS: A total of 100 fecal samples were collected from owned and stray cats in the Kırıkkale province. Epidemiological data on the sampled cats (e.g., age, race, and sex) were recorded. The samples were macroscopically investigated for the presence of cestode proglottids. The fecal smears were stained with Giemsa and Carbol fuchsin stains. The samples were prepared by centrifugal flotation with a saturated sugar solution...
December 2016: Türkiye Parazitolojii Dergisi
https://www.readbyqxmd.com/read/28089591/evaluation-of-incidence-of-cholelithiasis-after-bariatric-surgery-in-subjects-treated-or-not-treated-with-ursodeoxycholic-acid
#15
Muriel Coupaye, Daniela Calabrese, Ouidad Sami, Simon Msika, Séverine Ledoux
BACKGROUND: The use of ursodeoxycholic acid (UDCA) to prevent gallstone formation after gastric bypass (RYGB) is still debated. Furthermore, only 1 study has assessed the effectiveness of UDCA after sleeve gastrectomy (SG) with mitigated results. OBJECTIVES: To compare the incidence of cholelithiasis (CL) between patients treated or not treated with UDCA after RYGB and SG. SETTING: University hospital, France. METHODS: Since January 2008, a postoperative ultrasound monitoring was scheduled for all patients without previous cholecystectomy who underwent bariatric surgery in our institution...
December 2, 2016: Surgery for Obesity and related Diseases: Official Journal of the American Society for Bariatric Surgery
https://www.readbyqxmd.com/read/28089094/postprandial-clearance-of-oxidized-low-density-lipoprotein-in-patients-with-stroke-due-to-atherosclerosis
#16
Sami Al Kasab, Christy Cassarly, Ngoc-Anh Le, Renee Martin, Julia Brinley, Marc I Chimowitz, Tanya N Turan
BACKGROUND: Oxidized low-density lipoprotein (OxLDL) is a contributor to atherosclerosis development. OxLDL formation increases in the postprandial state due to oxidative stress in subjects with coronary artery disease (CAD) and diabetes, but has not been studied in patients with atherosclerotic stroke. We aimed to determine differences in postprandial OxLDL in patients with atherosclerotic stroke compared to stroke from other causes. METHODS: Patients with ischemic stroke but no history of CAD (n = 42) were enrolled and categorized by stroke subtype as extracranial atherosclerosis (EC), n = 12; intracranial atherosclerosis (IC), n = 16; or other cause, n = 14...
January 6, 2017: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
https://www.readbyqxmd.com/read/28087354/effect-of-piroxicam-on-lipid-membranes-drug-encapsulation-and-gastric-toxicity-aspects
#17
Natalia Wilkosz, Sami Rissanen, Małgorzata Cyza, Renata Szybka, Maria Nowakowska, Alex Bunker, Tomasz Róg, Mariusz Kepczynski
Uptake of piroxicam, a non-steroidal anti-inflammatory drug, from the intestines after oral intake is limited due to its low solubility and its wide use is associated with several side effects related to the gastrointestinal tract. In this study, all-atom molecular dynamics (MD) simulations and fluorescent spectroscopy were employed to investigate the interaction of piroxicam in neutral, zwitterionic, and cationic forms with lipid bilayers composed of phosphatidylcholine, cholesterol, and PEGylated lipids. Our study was aimed to assess the potential for encapsulation of piroxicam in liposomal carriers and to shed more light on the process of gastrointestinal tract injury by the drug...
January 10, 2017: European Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28086790/rna-sequencing-for-global-gene-expression-associated-with-muscle-growth-in-a-single-male-modern-broiler-line-compared-to-a-foundational-barred-plymouth-rock-chicken-line
#18
Byung-Whi Kong, Nicholas Hudson, Dongwon Seo, Seok Lee, Bhuwan Khatri, Kentu Lassiter, Devin Cook, Alissa Piekarski, Sami Dridi, Nicholas Anthony, Walter Bottje
BACKGROUND: Modern broiler chickens exhibit very rapid growth and high feed efficiency compared to unselected chicken breeds. The improved production efficiency in modern broiler chickens was achieved by the intensive genetic selection for meat production. This study was designed to investigate the genetic alterations accumulated in modern broiler breeder lines during selective breeding conducted over several decades. METHODS: To identify genes important in determining muscle growth and feed efficiency in broilers, RNA sequencing (RNAseq) was conducted with breast muscle in modern pedigree male (PeM) broilers (n = 6 per group), and with an unselected foundation broiler line (Barred Plymouth Rock; BPR)...
January 13, 2017: BMC Genomics
https://www.readbyqxmd.com/read/28081345/growing-oxa-23-type-strains-among-carbapenem-resistant-acinetobacter-baumannii-and-tigecycline-as-an-alternate-combination-therapy
#19
Şerife Altun, Zeliha Koçak Tufan, Belgin Altun, Ufuk Önde, Sami Kınıklı, Ali Pekcan Demiröz
BACKGROUND/AIM: The increasing prevalence and global spread of difficult-to-treat carbapenem-resistant Acinetobacter baumannii has become a serious problem. The aim of this study is to investigate the resistance patterns and tigecycline sensitivity of carbapenem-resistant A. baumannii strains. MATERIALS AND METHODS: Acinetobacter strains that were carbapenem-resistant and collected mainly from intensive care units were included into this study. The antibiotic sensitivity/resistance of the strains to other antibiotics and tigecycline were noted...
December 20, 2016: Turkish Journal of Medical Sciences
https://www.readbyqxmd.com/read/28079945/systematic-review-of-site-distribution-of-bone-metastases-in-differentiated-thyroid-cancer
#20
REVIEW
Marcela Osorio, Sami P Moubayed, Henry Su, Mark L Urken
BACKGROUND: Thyroid cancer is the fastest growing cancer in the United States. A small portion of differentiated thyroid cancers (DTCs; 2% to 13%) develop bone metastases, which can decrease a patient's survival rate by more than 60%. METHODS: A systematic literature search of studies, including patients with DTC with bone metastases, was conducted by following Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. A case series of patients with DTC diagnosed with bone metastases seen at our institution was also included...
January 11, 2017: Head & Neck
keyword
keyword
90786
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"