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https://www.readbyqxmd.com/read/28222257/an-iron-ii-ylide-complex-as-a-masked-open-shell-iron-alkylidene-species-in-its-alkylidene-transfer-reactions-with-alkenes
#1
Jian Liu, Lianrui Hu, Lei Wang, Hui Chen, Liang Deng
Transition-metal alkylidenes are important reactive organometallic intermediates, and our current knowledge on them has been mainly restricted to those with closed-shell electronic configurations. In this study, we present the exploration on open-shell iron alkylidenes with a weak-field tripodal amido-phosphine-amido ligand. We found that a high-spin (amido-phosphine-amido)iron(II) complex can react with (p-tolyl)2CN2 to afford a high-spin (amido-ylide-amido)iron(II) complex, 2, which could transfer its alkylidene moiety to a variety of alkenes, either the electron-rich or electron-deficient ones, to form cyclopropane derivatives...
February 21, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28222107/transcriptional-response-to-131i-exposure-of-rat-thyroid-gland
#2
Nils Rudqvist, Johan Spetz, Emil Schüler, Toshima Z Parris, Britta Langen, Khalil Helou, Eva Forssell-Aronsson
Humans are exposed to 131I in medical diagnostics and treatment but also from nuclear accidents, and better knowledge of the molecular response in thyroid is needed. The aim of the study was to examine the transcriptional response in thyroid tissue 24 h after 131I administration in rats. The exposure levels were chosen to simulate both the clinical situation and the case of nuclear fallout. Thirty-six male rats were i.v. injected with 0-4700 kBq 131I, and killed at 24 h after injection (Dthyroid = 0.0058-3...
2017: PloS One
https://www.readbyqxmd.com/read/28221777/rhenium-complexes-based-on-2-pyridyl-1-2-3-triazole-ligands-a-new-class-of-co2-reduction-catalysts
#3
H Y Vincent Ching, Xia Wang, Menglan He, Noemi Perujo Holland, Régis Guillot, Cyrine Slim, Sophie Griveau, Hélène C Bertrand, Clotilde Policar, Fethi Bedioui, Marc Fontecave
A series of [Re(N^N)(CO)3(X)] (N^N = diimine and X = halide) complexes based on 4-(2-pyridyl)-1,2,3-triazole (pyta) and 1-(2-pyridyl)-1,2,3-triazole (tapy) diimine ligands have been prepared and electrochemically characterized. The first ligand-based reduction process is shown to be highly sensitive to the nature of the isomer as well as to the substituents on the pyridyl ring, with the peak potential changing by up to 700 mV. The abilities of this class of complexes to catalyze the electroreduction and photoreduction of CO2 were assessed for the first time...
February 21, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28221034/regioselective-1-4-conjugate-addition-of-grignard-reagents-to-%C3%AE-%C3%AE-%C3%AE-%C3%AE-dienones-and-%C3%AE-%C3%AE-%C3%AE-%C3%AE-dienyl-thiol-esters
#4
Emmanuel Amoah, R Karl Dieter
Alkyl Grignard reagents (Et, nBu, iPr, cyclohexyl), with the exception of tBuMgCl, undergo exclusive or exceptionally highly regioselective 1,4-addition reactions to α,β-γ,δ-unsaturated ketones, while aryl and heteroaryl Grignard reagents give mixed results ranging from exclusive 1,4-addition (1-naphthyl, 2-N-methylpyrrolyl) to regioselective 1,2-addition (2-furyl, 2:1). All alkyl, aryl, and heteroaryl Grignard reagents examined gave exclusive 1,4-addition reactions with α,β-γ,δ-unsaturated thiol esters, with the exception of tBuMgCl which gave an 80:20 mixture of 1,4-:1,6-addition products...
February 21, 2017: Journal of Organic Chemistry
https://www.readbyqxmd.com/read/28220862/induction-of-hair-follicle-dermal-papilla-cell-properties-in-human-induced-pluripotent-stem-cell-derived-multipotent-lngfr-thy-1-mesenchymal-cells
#5
Ophelia Veraitch, Yo Mabuchi, Yumi Matsuzaki, Takashi Sasaki, Hironobu Okuno, Aki Tsukashima, Masayuki Amagai, Hideyuki Okano, Manabu Ohyama
The dermal papilla (DP) is a specialised mesenchymal component of the hair follicle (HF) that plays key roles in HF morphogenesis and regeneration. Current technical difficulties in preparing trichogenic human DP cells could be overcome by the use of highly proliferative and plastic human induced pluripotent stem cells (hiPSCs). In this study, hiPSCs were differentiated into induced mesenchymal cells (iMCs) with a bone marrow stromal cell phenotype. A highly proliferative and plastic LNGFR(+)THY-1(+) subset of iMCs was subsequently programmed using retinoic acid and DP cell activating culture medium to acquire DP properties...
February 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28220518/describing-student-performance-a-comparison-among-clinical-preceptors-across-cultural-contexts
#6
Kerry Wilbur, Noha Hassaballa, Omaima S Mahmood, Emily K Black
CONTEXT: Health professional student evaluation during experiential training is notably subjective and assessor judgements may be affected by socio-cultural influences. OBJECTIVES: This study sought to explore how clinical preceptors in pharmacy conceptualise varying levels of student performance and to identify any contextual differences that may exist across different countries. METHODS: The qualitative research design employed semi-structured interviews...
February 20, 2017: Medical Education
https://www.readbyqxmd.com/read/28220255/phenological-patterns-of-flowering-across-biogeographical-regions-of-europe
#7
Barbara Templ, Matthias Templ, Peter Filzmoser, Annamária Lehoczky, Eugenija Bakšienè, Stefan Fleck, Hilppa Gregow, Sabina Hodzic, Gunta Kalvane, Eero Kubin, Vello Palm, Danuta Romanovskaja, Višnja Vucˇetic, Ana Žust, Bálint Czúcz
Long-term changes of plant phenological phases determined by complex interactions of environmental factors are in the focus of recent climate impact research. There is a lack of studies on the comparison of biogeographical regions in Europe in terms of plant responses to climate. We examined the flowering phenology of plant species to identify the spatio-temporal patterns in their responses to environmental variables over the period 1970-2010. Data were collected from 12 countries along a 3000-km-long, North-South transect from northern to eastern Central Europe...
February 20, 2017: International Journal of Biometeorology
https://www.readbyqxmd.com/read/28220053/simulation-study-on-effects-of-order-and-step-size-of-runge-kutta-methods-that-solve-contagious-disease-and-tumor-models
#8
Wang Z, Wang Q, Klinke Dj
Biological processes such as contagious disease spread patterns and tumor growth dynamics are modelled using a set of coupled differential equations. Experimental data is usually used to calibrate models so they can be used to make future predictions. In this study, numerical methods were implemented to approximate solutions to mathematical models that were not solvable analytically, such as a SARS model. More complex models such as a tumor growth model involve high-dimensional parameter spaces; efficient numerical simulation techniques were used to search for optimal or close-to-optimal parameter values in the equations...
September 2016: Journal of Computer Science and Systems Biology
https://www.readbyqxmd.com/read/28219911/triple-negative-breast-cancer-with-brain-metastasis-in-a-pregnant-woman
#9
Francisco Trinca, Mariana Inácio, Teresa Timóteo, Rui Dinis
A woman aged 35 years was diagnosed with triple-negative breast cancer in October 2012. During the investigation, it was discovered that she was pregnant, the patient decided to have an abortion. She was submitted to a radical modified mastectomy and adjuvant chemotherapy followed by adjuvant breast radiotherapy of the left breast. 2 months after the adjuvant treatment, she began to have headaches and dizziness. The cranial MRI (head MRI) showed brain metastasis. She was then treated with whole brain radiotherapy, stereotactic radiosurgery and concomitant temozolomide which resulted in complete response...
February 20, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28219250/luminometric-nanoparticle-based-assay-for-high-sensitivity-detection-of-%C3%AE-amyloid-aggregation
#10
Sari Pihlasalo, Takahiro Deguchi, Maria Virtamo, Jenna Jacobino, Karthik Chary, Francisco R López-Picón, Gerda Brunhofer-Bolzer, Roope Huttunen, Adyary Fallarero, Pia Vuorela, Harri Härmä
A nanoparticle-based assay utilizing time-resolved luminescence resonance energy transfer (TR-LRET) was developed for the detection of β-amyloid aggregation. The assay is based on the competitive adsorption of the sample and the acceptor-labeled protein to donor europium(III) polystyrene nanoparticles. The performance of the assay was demonstrated by following the fibrillization of β-amyloid peptide 1-42 (Aβ42) as a function of time and by comparing to the reference methods atomic force microscopy (AFM) and thioflavin T (ThT) assay...
February 21, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28219157/-long-term-effect-of-iodine-deficiency-on-growth-and-food-utilization-rate-in-second-filial-generation-rats
#11
Ainiwaer Muyeseer, G X Zhang, J Wang, Y Liu, X H Meng, Q Liu
Objective: To study the effect of iodine deficiency on body weight, food consumption, and food utilization rate of second filial generation Wistar rats. Methods: According to the food pattern of a high-iodine deficient population, two types of low-iodine food have been produced using the main crops grown in this area (iodine levels of 50 and 20 μg/kg, respectively). Wistar rats were randomly divided into three groups, normal iodine group (NI group), low-iodine group one (LI group) and low-iodine group two (LII group), using the random number table method and fed diets containing 300, 50, and 20 μg/kg of iodine, respectively...
February 6, 2017: Zhonghua Yu Fang Yi Xue za Zhi [Chinese Journal of Preventive Medicine]
https://www.readbyqxmd.com/read/28218813/family-centered-care-for-infants-born-preterm-comparing-parents-and-physical-therapists-perceptions
#12
Saori Miyagishima, Nobuaki Himuro, Naoki Kozuka, Mitsuru Mori, Hiroyuki Tsutsumi
OBJECTIVES: The objective of this study was to compare perceptions between physical therapists and parents about family-centered care for preterm infants. METHODS: A translated version of The Measure of Processes of Care 20 (MPOC-20) and a Measures of Processes of Care for Service Providers (MPOC-SP) were used to evaluate the family-centered care for preterm infants. RESULTS: A total of 42 parents of 44 preterm infants and 9 physical therapists completed questionnaires...
February 20, 2017: Pediatrics International: Official Journal of the Japan Pediatric Society
https://www.readbyqxmd.com/read/28218632/clinical-case-of-the-month-group-g-streptococcal-bacteremia-secondary-to-a-burn-wound-infection
#13
Paige Deichmann, Amol Sura, Charles Sanders, Nisha Aravindakshan-Patel, Fred Lopez
A 61-year-old man presented to the emergency department with second degree burns along his right arm and hand. He reported that his knees suddenly gave out while holding a pot of soup resulting in the scalding liquid spilling over his arm. His medical history is significant for alcohol abuse, chronic obstructive pulmonary disease, atrial fibrillation, congestive heart failure with preserved ejection fraction, chronic knee instability, and degenerative joint disease of the spine.
January 2017: Journal of the Louisiana State Medical Society: Official Organ of the Louisiana State Medical Society
https://www.readbyqxmd.com/read/28218334/early-clinical-predictors-of-motor-function-in-the-upper-extremity-one-month-post-stroke
#14
Jenny Snickars, Hanna C Persson, Katharina S Sunnerhagen
OBJECTIVE: To investigate factors within 3 days post-stroke that could predict severe impairment in motor function in the upper extremity at one month post-stroke. METHODS: This cross-sectional study included 104 patients with first-ever stroke and impaired motor function in the upper extremity. Initial impairment in motor function, demographic data, type of stroke and stroke risk factors were chosen as possible predictors. Severe impairment in motor function was defined as ≤ 31p according to the Fugl-Meyer Assessment for Upper Extremity (FMA-UE)...
February 16, 2017: Journal of Rehabilitation Medicine
https://www.readbyqxmd.com/read/28217887/gastric-antral-vascular-ectasia-in-systemic-sclerosis-where-do-we-stand
#15
REVIEW
Hala El-Gendy, Kyrillus S Shohdy, Gehad G Maghraby, Kerolos Abadeer, Moustafa Mahmoud
Gastric antral vascular ectasia (GAVE) continues to be a challenge in both diagnosis and treatment. GAVE has a diverse group of associations and presumed causes, including cirrhosis, chronic renal failure and autoimmune connective tissue diseases. However, in most occasions, the management plan of GAVE itself is the same whatever the underlying disease by using Argon plasma coagulation (APC). Herein, we will discuss three cases of systemic sclerosis-associated GAVE presenting with either acute or chronic gastrointestinal bleeding showing variable responses to APC...
February 20, 2017: International Journal of Rheumatic Diseases
https://www.readbyqxmd.com/read/28217132/effects-of-environmental-conditions-on-the-fitness-penalty-in-herbicide-resistant-brachypodium-hybridum
#16
Eyal Frenkel, Maor Matzrafi, Baruch Rubin, Zvi Peleg
Herbicide-resistance mutations may impose a fitness penalty in herbicide-free environments. Moreover, the fitness penalty associated with herbicide resistance is not a stable parameter and can be influenced by ecological factors. Here, we used two Brachypodium hybridum accessions collected from the same planted forest, sensitive (S) and target-site resistance (TSR) to photosystem II (PSII) inhibitors, to study the effect of agro-ecological parameters on fitness penalty. Both accessions were collected in the same habitat, thus, we can assume that the genetic variance between them is relatively low...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28216842/case-based-learning-a-study-to-ascertain-the-effectiveness-in-enhancing-the-knowledge-among-interns-of-an-indian-dental-institute
#17
Kamal Shigli, Y B Aswini, Deepti Fulari, Banashree Sankeshwari, Dayanand Huddar, M Vikneshan
OBJECTIVE: Time and again, it has been shown that active learning promotes critical thinking, and this environment has to be fostered in dental education too. Therefore, the present study was carried out with an aim to know the effectiveness of case-based learning (CBL) in enhancing the knowledge of dental interns of a dental institute in India. MATERIALS AND METHODS: This pre-post single-blinded, experimental study was conducted in two sessions on a purposive sample of 45 dental interns who gave informed consent...
January 2017: Journal of Indian Prosthodontic Society
https://www.readbyqxmd.com/read/28216511/global-kinetoplastea-phylogeny-inferred-from-a-large-scale-multigene-alignment-including-parasitic-species-for-better-understanding-transitions-from-a-free-living-to-a-parasitic-lifestyle
#18
Euki Yazaki, Sohta A Ishikawa, Keitaro Kume, Akira Kumagai, Takashi Kamaishi, Goro Tanifuji, Tetsuo Hashimoto, Yuji Inagaki
All members of the order Trypanosomatida known to date are parasites that are most likely descendants of a free-living ancestor. Trypanosomatids are an excellent model to assess the transition from a free-living to a parasitic lifestyle, because a large amount of experimental data has been accumulated for well-studied members that are harmful to humans and livestock (Trypanosoma spp. and Leishmania spp.). However, recent advances in our understanding of the diversity of trypanosomatids and their close relatives (i...
February 20, 2017: Genes & Genetic Systems
https://www.readbyqxmd.com/read/28216406/the-relationship-between-maternal-corticosteroid-use-and-orofacial-clefts-a-meta-analysis
#19
Wen-Lin Xiao, Xiao-Ya Liu, Yan-Shan Liu, Dai-Zun Zhang, Ling-Fa Xue
The aim was to evaluate the relationship between maternal corticosteroid use during first trimester of pregnancy and risk of orofacial clefts (OC). The overall findings showed a certain association between maternal corticosteroid use and occurrence of OC, compared with non-users (OR=1.16 [95% CI: 1.01-1.33]). When study type was considered this association was significant only for case-control studies (OR=1.22 [95% CI: 1.02-1.47]), and not for cohort studies (OR=1.09 [95% CI: 0.88-1.34]) when there are many confounders (dose, route of application, disease etc...
February 12, 2017: Reproductive Toxicology
https://www.readbyqxmd.com/read/28216308/craniofacial-implants-at-a-single-centre-2005-2015-retrospective-review-of-451-implants
#20
R Elledge, J Chaggar, N Knapp, T Martin, N White, D Evriviades, S Edmondson, S Parmar
Craniofacial endosseous implants are regularly used to support prostheses in the rehabilitation of complex defects, but reported success rates vary. To review our own clinical practice over 10 years, and particularly to examine the impact of radiotherapy and the timing of placement on the survival of implants, we retrospectively audited the records for all patients who had endosseous implants for prosthetic rehabilitation in our unit between 2005 and 2015. We reviewed 167 records, which gave 451 implants, of which, 222 (49%) were auricular, 98 (22%) nasal, and 131 (29%) orbital...
February 16, 2017: British Journal of Oral & Maxillofacial Surgery
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