keyword
MENU ▼
Read by QxMD icon Read
search

vcd

keyword
https://www.readbyqxmd.com/read/28338625/-r-aloesaponol-iii-8-methyl-ether-from-eremurus-persicus-a-novel-compound-against-leishmaniosis
#1
Daniela Rossi, Karzan Mahmood Ahmed, Raffaella Gaggeri, Serena Della Volpe, Lauretta Maggi, Giuseppe Mazzeo, Giovanna Longhi, Sergio Abbate, Federica Corana, Emanuela Martino, Marisa Machado, Raquel Varandas, Maria do Céu Sousa, Simona Collina
Leishmaniosis is a neglected tropical disease which affects several millions of people worldwide. The current drug therapies are expensive and often lack efficacy, mainly due to the development of parasite resistance. Hence, there is an urgent need for new drugs effective against Leishmania infections. As a part of our ongoing study on the phytochemical characterization and biological investigation of plants used in the traditional medicine of western and central Asia, in the present study, we focused on Eremurus persicus root extract in order to evaluate its potential in the treatment of leishmaniosis...
March 24, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28335899/percutaneous-plug-based-arteriotomy-closure-device-for-large-bore-access-a-multicenter-prospective-study
#2
Nicolas M Van Mieghem, Azeem Latib, Jan van der Heyden, Lennart van Gils, Joost Daemen, Todd Sorzano, Jurgen Ligthart, Karin Witberg, Thom de Kroon, Nathaniel Maor, Antonio Mangieri, Matteo Montorfano, Peter P de Jaegere, Antonio Colombo, Gary Roubin
OBJECTIVES: The authors sought to study the safety and efficacy of the MANTA Vascular Closure Device (VCD), a novel collagen-based technology dedicated to closure of large-bore arteriotomies. BACKGROUND: Novel transfemoral therapeutic interventions requiring large-bore catheters have become valid minimally invasive options but have inherent access management challenges. To date, no dedicated vascular closure devices exist for large arteriotomies. METHODS: A prospective, single-arm clinical investigation enrolling patients who underwent elective percutaneous interventions with large-bore catheters and planned percutaneous arteriotomy closure in 3 European institutions...
March 27, 2017: JACC. Cardiovascular Interventions
https://www.readbyqxmd.com/read/28315381/alfa-helix-to-beta-sheet-transition-in-long-chain-poly-l-lysine-formation-of-alfa-helical-fibrils-by-poly-l-lysine
#3
Katarzyna Cieślik-Boczula
The temperature-induced α-helix to β-sheet transition in long-chain poly-l-lysine (PLL), accompanied by the gauche-to-trans isomerization of CH2 groups in the hydrocarbon side chains of Lys amino acid residues, and formation of β-sheet as well as α-helix fibrillar aggregates of PLL have been studied using Fourier-transform infrared (FT-IR) and vibrational circular dichroism (VCD) spectroscopy, and transmission electron microscopy (TEM). In a low-temperature alkaline water solution or in a methanol-rich water mixture, the secondary structure of PLL is represented by α-helical conformations with unordered and gauche-rich hydrocarbon side chains...
March 14, 2017: Biochimie
https://www.readbyqxmd.com/read/28296143/targeting-the-safe-zone
#4
Andrea Mignatti, Patricia Friedmann, David Paul Slovut
OBJECTIVE: The aim of this study was to assess the effectiveness of a quality improvement (QI) program in reducing vascular complications during cardiac catheterization. BACKGROUND: Vascular access complications during cardiac catheterization are associated with higher morbidity and mortality. We implemented a QI program focused on using micropuncture techniques and targeting the "safe zone," an area below the inferior border of the inferior epigastric artery and above the inferior border of the femoral head, for femoral artery puncture...
March 15, 2017: Catheterization and Cardiovascular Interventions
https://www.readbyqxmd.com/read/28294053/absolute-configuration-determination-by-quantum-mechanical-calculation-of-chiroptical-spectra-basics-and-applications-to-fungal-metabolites
#5
Stefano Superchi, Patrizia Scafato, Marcin Górecki, Gennaro Pescitelli
The application of quantum mechanical simulation of chiroptical properties, i.e. electronic circular dichroism (ECD), optical rotation (OR), and vibrational circular dichroism (VCD), to the assignment of the absolute configuration of chiral naturally occurring metabolites of fungal origin, is reviewed. The fundamentals of such chiroptical spectroscopies as well as the specific experimental and computational issues allied to the application of their ab initio calculation is reported. Some examples, related to the use of the ECD, VCD, and OR techniques and highlighting the practical application of the methods, are also described...
March 10, 2017: Current Medicinal Chemistry
https://www.readbyqxmd.com/read/28290589/vibrational-circular-dichroism-and-single-crystal-x-ray-diffraction-analyses-of-ir-bzq-2-phen-bzq-benzo-h-quinoline-phen-1-10-phenanthroline-absolute-configuration-and-role-of-ch-%C3%AF-interaction-in-molecular-packing
#6
Kazuyoshi Takimoto, Yutaka Watanabe, Shigeki Mori, Hisako Sato
Vibrational circular dichroism (VCD) spectra are measured for dichloromethane solutions of the resolved enantiomers of [Ir(bzq)2(phen)](+) (bzqH = benzo[h]quinoline; phen = 1,10-phenanthroline). The absolute configuration of each enantiomer is determined by comparing the experimental and theoretical spectra. The result is in accord with the results of the X-ray single crystallographic analysis on the enantiomeric crystal. Moreover, the importance of the CH-π interaction is derived between phen and a hydrogen atom in bzq in the molecular packing of both the enantiomeric and racemic crystals...
March 14, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28289447/vocal-cord-dysfunction-a-functional-cause-of-respiratory-distress
#7
REVIEW
Miles Weinberger, Devang Doshi
VCD has several clinical and physiological phenotypes, which should be individually identifiedhttp://ow.ly/orfb309fMxh.
March 2017: Breathe
https://www.readbyqxmd.com/read/28257188/homochiral-evolution-in-self-assembled-chiral-polymers-and-block-copolymers
#8
Tao Wen, Hsiao-Fang Wang, Ming-Chia Li, Rong-Ming Ho
The significance of chirality transfer is not only involved in biological systems, such as the origin of homochiral structures in life but also in man-made chemicals and materials. How the chiral bias transfers from molecular level (molecular chirality) to helical chain (conformational chirality) and then to helical superstructure or phase (hierarchical chirality) from self-assembly is vital for the chemical and biological processes in nature, such as communication, replication, and enzyme catalysis. In this Account, we summarize the methodologies for the examination of homochiral evolution at different length scales based on our recent studies with respect to the self-assembly of chiral polymers and chiral block copolymers (BCPs*)...
March 3, 2017: Accounts of Chemical Research
https://www.readbyqxmd.com/read/28256432/phase-ii-study-of-dose-attenuated-bortezomib-cyclophosphamide-and-dexamethasone-vcd-lite-in-very-old-or-otherwise-toxicity-vulnerable-adults-with-newly-diagnosed-multiple-myeloma
#9
Sascha A Tuchman, Joseph O Moore, Carlos D DeCastro, Zhiguo Li, Emily Sellars, Yubin Kang, Gwynn Long, Cristina G Gasparetto
OBJECTIVES: Multiple myeloma (MM) primarily strikes older adults, but full-dose chemotherapy such as bortezomib (Velcade), cyclophosphamide and dexamethasone (VCD) is often excessively toxic to very old or frail adults and those with substantial comorbidities. We piloted dose-attenuated VCD ("VCD-Lite") in such vulnerable adults with newly diagnosed MM (NDMM). MATERIALS AND METHODS: Subjects with NDMM and a high risk of therapy-related toxicity due to factors above received bortezomib 1...
February 27, 2017: Journal of Geriatric Oncology
https://www.readbyqxmd.com/read/28252625/-light-chain-deposition-disease-is-a-hematologic-problem
#10
I G Rekhtina, L P Mendeleeva, L S Biryukova
AIM: To analyze clinical and laboratory data and treatment results in patients with light-chain deposition disease (LCDD). SUBJECTS AND METHODS: Nine patients with LCDD and kidney injury were examined. The diagnosis was based on the results of light and immunofluorescence microscopy of renal biopsy specimens. All the patients received bortezomib, cyclophosphamide, and dexamethasone (VCD) induction therapy. RESULTS: Six patients were diagnosed with multiple myeloma; in 3 patients LCDD was considered within monoclonal gammopathy manly involving the kidney...
2017: Terapevticheskiĭ Arkhiv
https://www.readbyqxmd.com/read/28225179/frozen-chirality-of-tertiary-aromatic-amides-access-to-enantioenriched-tertiary-%C3%AE-amino-acid-or-amino-alcohol-without-any-chiral-reagent
#11
Thi Thoa Mai, Baby Viswambharan, Didier Gori, Régis Guillot, Jean-Valère Naubron, Cyrille Kouklovsky, Valérie Alezra
One of the fundamental and intriguing aspects of life is the homochirality of the essential molecules. In this field, the absolute asymmetric synthesis of α-amino acids is a major challenge. Herein we report access, by chemical means, to tertiary α-amino acids derivatives in up to 96% ee without using any chiral reagent. In our strategy, the dynamic axial chirality of tertiary aromatic amides is frozen in a crystal and is responsible for the stereoselectivity of the subsequent steps. Furthermore, we are able to control the configuration of the final product by carefully sorting out the initial crystals...
February 22, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28209184/arterial-access-site-complications-after-use-of-a-vascular-closure-device-related-to-puncture-height
#12
Benjamin Sartorius, Michael Behnes, Melike Ünsal, Ursula Hoffmann, Siegfried Lang, Kambis Mashayekhi, Martin Borggrefe, Ibrahim Akin
BACKGROUND: To analyze differences of access-site complications related to the height of femoral arterial puncture and the use of a vascular closure device (VCD) following percutaneous coronary intervention (PCI). METHODS: A subgroup of the FERARI study being treated by femoral arterial access and valuable inguinal angiography before implantation of a VCD were included. Inguinal angiographies were systematically reviewed by two independent cardiologists to determine the correct height of femoral arterial puncture...
February 16, 2017: BMC Cardiovascular Disorders
https://www.readbyqxmd.com/read/28208728/parabens-accelerate-ovarian-dysfunction-in-a-4-vinylcyclohexene-diepoxide-induced-ovarian-failure-model
#13
Jae-Hwan Lee, Myeongho Lee, Changhwan Ahn, Hee Young Kang, Dinh Nam Tran, Eui-Bae Jeung
Parabens are widely used preservatives in basic necessities such as cosmetic and pharmaceutical products. In previous studies, xenoestrogenic actions of parabens were reported in an immature rat model and a rat pituitary cell line (GH3 cells). The relationship between parabens and ovarian failure has not been described. In the present study, the influence of parabens on ovarian folliculogenesis and steroidogenesis was investigated. A disruptor of ovarian small pre-antral follicles, 4-vinylcyclohexene diepoxide (VCD, 40 mg/kg), was used to induce premature ovarian failure (POF)...
February 8, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28190935/reassignment-of-the-absolute-configuration-of-plakinidone-from-the-sponge-consortium-plakortis-halichondrioides-xestospongia-deweerdtae-using-a-combination-of-synthesis-and-a-chiroptical-approach
#14
Carlos Jiménez-Romero, Joanna E Rode, Abimael D Rodríguez
Recent work by Wu et al. in connection with the first synthesis of the marine natural product plakinidone revealed that the most salient feature of its purported structure, a six-membered perlactone moiety, was in fact a five-membered lactone, i.e. a 3-methyl-4-hydroxy-2(5H)-furanone or tetronic acid ring. With the planar structure of plakinidone confidently revised, we undertook a new investigation to unambiguously establish its absolute configuration. Upon preparing two stable derivatives 1 and 5 from a sample of naturally occurring plakinidone extracted from the sponge association Plakortis halichondriodes-Xetospongia deweerdtae, the absolute configuration was assigned by synthesis and vibrational and electronic circular dichroism (VCD and ECD) measurements in combination with density functional theory calculations at the B3LYP/aug-cc-pVDZ/PCM(CH3CN) level of theory...
June 2016: Tetrahedron, Asymmetry
https://www.readbyqxmd.com/read/28178845/vibrational-circular-dichroism-spectra-for-large-molecules-and-molecules-with-heavy-elements
#15
Kevin Reiter, Michael Kühn, Florian Weigend
We present an implementation of vibrational circular dichroism (VCD) spectra in TURBOMOLE. We mainly followed the route proposed by Cheeseman [Chem. Phys. Lett. 252, 211 (1996)] and extended the modules for calculating the magnetic response and vibrational frequencies accordingly. The implementation allows for gauge origin invariant employment of effective core potentials, as demonstrated for Co(ppy)3, ppy = 2-Phenylpyridine. In this way, scalar relativistic effects are covered and heavy elements can be treated...
February 7, 2017: Journal of Chemical Physics
https://www.readbyqxmd.com/read/28138511/strokog-stroke-and-cognition-consortium-an-international-consortium-to-examine-the-epidemiology-diagnosis-and-treatment-of-neurocognitive-disorders-in-relation-to-cerebrovascular-disease
#16
Perminder S Sachdev, Jessica W Lo, John D Crawford, Lisa Mellon, Anne Hickey, David Williams, Régis Bordet, Anne-Marie Mendyk, Patrick Gelé, Dominique Deplanque, Hee-Joon Bae, Jae-Sung Lim, Amy Brodtmann, Emilio Werden, Toby Cumming, Sebastian Köhler, Frans R J Verhey, Yan-Hong Dong, Hui Hui Tan, Christopher Chen, Xu Xin, Raj N Kalaria, Louise M Allan, Rufus O Akinyemi, Adesola Ogunniyi, Aleksandra Klimkowicz-Mrowiec, Martin Dichgans, Frank A Wollenweber, Vera Zietemann, Michael Hoffmann, David W Desmond, Thomas Linden, Christian Blomstrand, Björn Fagerberg, Ingmar Skoog, Olivier Godefroy, Mélanie Barbay, Martine Roussel, Byung-Chul Lee, Kyung-Ho Yu, Joanna Wardlaw, Stephen J Makin, Fergus N Doubal, Francesca M Chappell, Velandai K Srikanth, Amanda G Thrift, Geoffrey A Donnan, Nagaendran Kandiah, Russell J Chander, Xuling Lin, Charlotte Cordonnier, Solene Moulin, Costanza Rossi, Behnam Sabayan, David J Stott, J Wouter Jukema, Susanna Melkas, Hanna Jokinen, Timo Erkinjuntti, Vincent C T Mok, Adrian Wong, Bonnie Y K Lam, Didier Leys, Hilde Hénon, Stéphanie Bombois, Darren M Lipnicki, Nicole A Kochan
INTRODUCTION: The Stroke and Cognition consortium (STROKOG) aims to facilitate a better understanding of the determinants of vascular contributions to cognitive disorders and help improve the diagnosis and treatment of vascular cognitive disorders (VCD). METHODS: Longitudinal studies with ≥75 participants who had suffered or were at risk of stroke or TIA and which evaluated cognitive function were invited to join STROKOG. The consortium will facilitate projects investigating rates and patterns of cognitive decline, risk factors for VCD, and biomarkers of vascular dementia...
2017: Alzheimer's & Dementia: Diagnosis, Assessment & Disease Monitoring
https://www.readbyqxmd.com/read/28121978/a-vibrating-cold-device-to-reduce-pain-in-the-pediatric-emergency-department-a-randomized-clinical-trial
#17
Debra Ann Potts, Katherine Finn Davis, Okan U Elci, Joel A Fein
OBJECTIVE: Pain of intravenous (IV) catheter insertion can be mitigated with appropriate analgesia, thereby avoiding unnecessary distress. Our objective was to compare the self-reported pain of IV catheter insertion in children when using a vibrating cold device (VCD) versus standard of care 4% topical lidocaine cream (TL). METHODS: This was a 2-arm randomized controlled noninferiority trial with a convenience sample of 4- to 18-year-olds requiring nonemergent IV catheter insertion...
January 24, 2017: Pediatric Emergency Care
https://www.readbyqxmd.com/read/28118957/the-role-of-chirality-in-a-set-of-key-intermediates-of-pharmaceutical-interest-3-aryl-substituted-%C3%AE-butyrolactones-evidenced-by-chiral-hplc-separation-and-by-chiroptical-spectroscopies
#18
Daniela Rossi, Rita Nasti, Simona Collina, Giuseppe Mazzeo, Simone Ghidinelli, Giovanna Longhi, Maurizio Memo, Sergio Abbate
The enantiomers of four chiral 3-aryl-substituted-γ-butyrolactones, key intermediates for the preparation of compounds of pharmaceutical interest, were successfully isolated by enantioselective chromatography, employing the Chiralpak AD-H chiral stationary phase. For all compounds the same elution order was observed, as monitored by a full set of chiroptical methods that we employed, namely ORD (optical rotatory dispersion), ECD (electronic circular dichroism, or CD in the UV range), and VCD (vibrational circular dichroism, or CD in the IR range)...
January 5, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28103752/mynxgrip-for-closure-of-antegrade-puncture-after-peripheral-interventions-with-same-day-discharge
#19
Maciej J Pruski, Aleksandra M Blachut, Magda Konkolewska, Adam Janas, Eugeniusz Hrycek, Piotr P Buszman, Radoslaw S Kiesz
BACKGROUND: This was the first prospective study to assess the safety and efficiency of MynxGrip vascular closure device (VCD) in peripheral interventions with antegrade access. METHODS AND RESULTS: We enrolled 66 consecutive patients from 1 center. All patients were discharged home on the day of procedure and were observed for adverse events at 1 and 30 days of follow-up. No major complications were observed. The rate of minor complications (conversion to manual or mechanical compression) was 7...
February 2017: Vascular and Endovascular Surgery
https://www.readbyqxmd.com/read/28079923/vibrational-circular-dichroism-of-a-2-5-diketopiperazine-dkp-peptide-evidence-for-dimer-formation-in-cyclo-ll-or-ld-diphenylalanine-in-the-solid-state
#20
Ariel Pérez-Mellor, Anne Zehnacker
The diastereomer diketopiperazine (DKP) peptides built on phenylalanine, namely, cyclo diphenylalanine LPhe-LPhe and LPhe-DPhe, were studied in the solid phase by vibrational circular dichroism (VCD) coupled to quantum chemical calculations. The unit structure of cyclo LPhe-LPhe in KBr pellets is a dimer bridged by two strong NH…O hydrogen bonds. The intense bisignate signature in the CO stretch region is interpreted in terms of two contributions arising from the free COs of the dimer and the antisymmetrical combination of the bound COs...
January 12, 2017: Chirality
keyword
keyword
66110
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"