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https://www.readbyqxmd.com/read/29053892/ultra-fast-molecular-rotors-within-porous-organic-cages
#1
Ashlea R Hughes, Nick J Brownbill, Rachel C Lalek, Michael E Briggs, Anna G Slater, Andrew I Cooper, Frederic Blanc
Using variable temperature 2H static NMR spectra and 13C spin-lattice relaxation times (T1), we show that two different porous organic cages with tubular architectures are ultra-fast molecular rotors. The central para-phenylene rings that frame the 'windows' to the cage voids display very rapid rotational rates of the order of 1.2-8 x106 Hz at 230 K with low activation energy barriers in the 12-18 kJ mol-1 range. These cages act as hosts to iodine guest molecules, which dramatically slows down the rotational rates of the phenylene groups (5- 10 x104 Hz at 230 K), demonstrating potential use in applications that require molecular capture and release...
October 20, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/29053279/reduced-graphene-oxide-lii-composite-lithium-ion-battery-cathodes
#2
Sanghyeon Kim, Sung-Kon Kim, Pengcheng Sun, Nuri Oh, Paul V Braun
Li-iodine chemistry is of interest for electrochemical energy storage because it has been shown to provide both high power and high energy density. However, Li-iodine batteries are typically formed using Li metal and elemental iodine, which presents safety and fabrication challenges (e.g., the high vapor pressure of iodine). These disadvantages could be circumvented by using LiI as a starting cathode. Here, we present fabrication of a reduced graphene oxide (rGO)/LiI composite cathode, enabling for the first time the use of LiI as the Li-ion battery cathode...
October 20, 2017: Nano Letters
https://www.readbyqxmd.com/read/29052174/phagocytosis-deficiency-of-macrophages-in-nod-h-2-h4-mice-accelerates-the-severity-of-iodine-induced-autoimmune-thyroiditis
#3
Xue He, Chuhui Xiong, Aihua Liu, Wei Zhao, Xinghai Xia, Shiqiao Peng, Chenyan Li, Mi Zhou, Yushu Li, Xiaoguang Shi, Zhongyan Shan, Weiping Teng
Apoptosis occurs in many autoimmune diseases. Excess iodine induces thyrocyte apoptosis and increases the incidence and prevalence of autoimmune thyroiditis (AIT). However, the sequence of events between the appearance of thyrocyte apoptosis and the occurrence of thyroiditis remains uncharacterized. Furthermore, few studies have investigated the role of macrophage phagocytosis in the development of AIT. Therefore, we evaluated the relationship between apoptosis and inflammatory infiltration in NOD.H-2(h4) mouse thyroids by comparing the sequence of events in tissue samples...
October 20, 2017: Biological Trace Element Research
https://www.readbyqxmd.com/read/29052025/ultra-low-dose-ct-coronary-angiography-using-128-slice-dual-source-ct-with-low-concentration-contrast-agent-initial-experience
#4
Lei Zhao, Aishi Liu, Youmin Guo
PURPOSE: To optimize and evaluate an ultra-low-dose (ULD) technique for CT coronary angiography (CTCA). MATERIALS AND METHODS: Eighty-two patients were randomly divided into two groups. ULD and routine CTCA were performed in groups A and B. Image quality, radiation dose and contrast agent were evaluated. RESULTS: The effective dose (ED) was 0.20 ± 0.01 mSv for the ULD technique, a decrease of 87% (t = - 21.182, P < 0.001) compared with the control group...
October 19, 2017: Japanese Journal of Radiology
https://www.readbyqxmd.com/read/29052019/image-quality-improvements-using-adaptive-statistical-iterative-reconstruction-for-evaluating-chronic-myocardial-infarction-using-iodine-density-images-with-spectral-ct
#5
Junichi Kishimoto, Yasutoshi Ohta, Shinichiro Kitao, Tomomi Watanabe, Toshihide Ogawa
Single-source dual-energy CT (ssDECT) allows the reconstruction of iodine density images (IDIs) from projection based computing. We hypothesized that adding adaptive statistical iterative reconstruction (ASiR) could improve image quality. The aim of our study was to evaluate the effect and determine the optimal blend percentages of ASiR for IDI of myocardial late iodine enhancement (LIE) in the evaluation of chronic myocardial infarction using ssDECT. A total of 28 patients underwent cardiac LIE using a ssDECT scanner...
October 19, 2017: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/29051792/papillary-thyroid-cancer-recurrence-43%C3%A2-years-following-total-thyroidectomy-and-radioactive-iodine-ablation-a-case-report
#6
Yaw Amoako-Tuffour, M Elise Graham, Martin Bullock, Matthew H Rigby, Jonathan Trites, S Mark Taylor, Robert D Hart
BACKGROUND: Recurrent papillary thyroid carcinoma (PTC) beyond the first two decades of definitive treatment (i.e. total thyroidectomy and radioactive iodine ablation) is a rare occurrence. CASE PRESENTATION: We present a case of a 71-year old Caucasian female with a distant history of PTC treated with total thyroidectomy and radioactive iodine ablation who experienced recurrence of her disease 43 years following initial diagnosis and definitive treatment. She presented with palpable left-sided neck mass and subsequently underwent a level II, III, neck dissection and adjuvant iodine ablation...
2017: Thyroid Research
https://www.readbyqxmd.com/read/29051477/low-kv-and-low-concentration-contrast-agent-with-iterative-reconstruction-of-computed-tomography-ct-coronary-angiography-a-preliminary-study
#7
Hong Zhang, Yanhe Ma, Jun Lyu, Yapeng Yang, Wei Yuan, Zhenchun Song
BACKGROUND The aim of this study was to evaluate the image quality and radiation dose of CT coronary angiography (CTCA) with low kV, low concentration contrast agent, and iterative reconstruction. MATERIAL AND METHODS Ninety cases were randomly divided into 3 groups according to contrast agent concentration: group A 270 mg/ml (100 kV), group B 350 mg/ml (120 kV), and group C 370 mg/ml (120 kV), with 30 cases per group. Tube current was 200-250 mAs. Collimator width was 128×0.6 mm. Rotation speed was 0.27 s...
October 20, 2017: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/29051343/iodinated-contrast-agents-perturb-iodide-uptake-by-the-thyroid-independently-of-free-iodide
#8
Georges Vassaux, Colette Zwarthoed, Laurie Signetti, Julien Guglielmi, Catherine Compin, Jean-Marie Guigonis, Thierry Juhel, Olivier Humbert, Danielle Benisvy, Thierry Pourcher, Beatrice Cambien
The perturbation of thyroid iodide uptake is a well-documented side effect of the utilization of iodinated contrast media (ICM) administrated intravenously. This side effect is thought to be mediated by free iodide in ICM formulations but this hypothesis has never been formally demonstrated. The aim of the present paper is to assess the validity of this hypothesis. Methods: We used mass spectrometry analysis to quantify free-iodide contamination in ICM. Established cell lines expressing the Na/I symporter (NIS) were used to quantify the effect of ICM on iodide uptake...
October 19, 2017: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
https://www.readbyqxmd.com/read/29051093/purification-and-analysis-of-the-composition-and-antioxidant-activity-of-polysaccharides-from-helicteres-angustifolia-l
#9
Qianwei Liu, Xiaodong Ge, Ligen Chen, Delin Cheng, Zhi Yun, Wei Xu, Rong Shao
The antioxidant activity of polysaccharides has attracted tremendous research interest in recent years. In this study, we aimed to investigate the antioxidant properties of Helicteres angustifolia L. polysaccharides (HALP) that was acquired by water extraction and alcohol precipitation using ultrasound-assisted method with decolorization and protein removal. The polysaccharides were then successively purified using chromatography on DEAE-cellulose and Sephadex S-300 columns with two major fractions: HALPs1-1 and HALPs2-1...
October 16, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29050705/iodine-nutritional-status-in-asturian-schoolchildren
#10
María Riestra Fernández, Edelmiro Menéndez Torre, Francisco Díaz Cadórniga, Juan Carlos Fernández Fernández, Elías Delgado Álvarez
INTRODUCTION: Iodine deficiency is a public health problem, and iodine nutritional status should therefore be regularly measured. OBJECTIVE: To ascertain iodine nutritional status in Asturias and its relation to use of iodized salt and to other sociodemographic and nutritional parameters. MATERIAL AND METHODS: A descriptive, observational study was conducted in a random sample of schoolchildren aged 5 to 14 years, in whom urinary iodine levels were measured by high-performance liquid chromatography...
November 2017: Endocrinología, diabetes y nutrición
https://www.readbyqxmd.com/read/29050668/microbial-transformation-of-iodine-from-radioisotopes-to-iodine-deficiency
#11
Chris M Yeager, Seigo Amachi, Russell Grandbois, Daniel I Kaplan, Chen Xu, Kathy A Schwehr, Peter H Santschi
Iodine is a biophilic element that is important for human health, both as an essential component of several thyroid hormones and, on the other hand, as a potential carcinogen in the form of radioiodine generated by anthropogenic nuclear activity. Iodine exists in multiple oxidation states (-1, 0, +1, +3, +5, and +7), primarily as molecular iodine (I2), iodide (I(-)), iodate [Formula: see text] , or organic iodine (org-I). The mobility of iodine in the environment is dependent on its speciation and a series of redox, complexation, sorption, precipitation, and microbial reactions...
2017: Advances in Applied Microbiology
https://www.readbyqxmd.com/read/29050248/low-dose-of-bisphenol-a-enhance-the-susceptibility-of-thyroid-carcinoma-stimulated-by-dhpn-and-iodine-excess-in-f344-rats
#12
Jing Zhang, Xiaochen Zhang, Yanan Li, Zhenzhen Zhou, Chuanlong Wu, Zhiyan Liu, Lanxiang Hao, Shanshan Fan, Fang Jiang, Yan Xie, Ling Jiang
Thyroid carcinoma (TC) is the most common endocrine neoplasm. The risk of TC as a second primary malignancy (SPM) of breast cancer is significantly increased. Bisphenol A (BPA) is a widely contacted xenoestrogen and increases susceptibility to breast cancer through binding to estrogen receptor alpha (ERα). However, the effect of BPA on thyroid carcinogenesis has not been fully demonstrated. This present study aimed to characterize the effects of BPA on the development of TC using a Fischer 344 (F344) rat model...
September 19, 2017: Oncotarget
https://www.readbyqxmd.com/read/29049252/prognostic-role-of-fdg-pet-ct-in-patients-with-differentiated-thyroid-cancer-treated-with-131-iodine-empiric-therapy
#13
Barbara Salvatore, Michele Klain, Emanuele Nicolai, Domenico D'Amico, Gianluca De Matteis, Marco Raddi, Rosa Fonti, Teresa Pellegrino, Giovanni Storto, Alberto Cuocolo, Leonardo Pace
BACKGROUND: To assess the long-term prognostic value of F-fluorodeoxyglucose (FDG) positron emission tomography/computed tomography (PET/CT) in patients with differentiated thyroid carcinoma (DTC) undergoing empiric radioiodine (RAI) therapy due to raising values of thyroglobulin (Tg). METHODS: Forty-nine patients with histological diagnosis of DTC (31 with papillary and 18 with follicular carcinoma) follow-up for a mean period of 7.9 ± 5 years after empiric RAI therapy were retrospectively analyzed...
October 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29049170/case-report-of-a-congenital-duodenal-transverse-septum-causing-partial-obstruction
#14
Xingjun Guo, Yahong Yu, Min Wang, Renyi Qin
INTRODUCTION: Duodenal obstructions caused by congenital anatomic abnormalities are rare in adults. Several patients in whom the duodenal obstruction was caused by a congenital duodenal diaphragm have been described. The duodenal obstruction in the patient presented herein was caused by a transverse septum, which has not been previously reported. A transverse septum is usually observed in the vagina; those involving the digestive tract have been rarely observed. CASE PRESENTATION: We herein report a case involving a 69-year-old woman with a congenital duodenal transverse septum causing partial obstruction...
October 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29048237/lenvatinib-for-the-treatment-of-radio-iodine-refractory-thyroid-cancer-in-real-life-practice
#15
Amandine Berdelou, Isabelle Borget, Yann Godbert, Thierry Nguyen, Marie-Eve Garcia, Cecile N Chougnet, Aurélie Ferru, Camille Buffet, Olivier Chabre, Olivier Huillard, Sophie Leboulleux, Martin Schlumberger
BACKGROUND: In the SELECT phase III trial in advanced radio-iodine refractory differentiated thyroid cancer (rDTC), lenvatinib improved median progression free survival (PFS) over placebo by almost 15 months and induces an objective response rate of 64.8%, but adverse events occurred in almost all patients. The present study evaluates the efficacy and toxicity of lenvatinib treatment in real-life practice. METHODS: Clinical charts of 88 consecutive patients treated with lenvatinib from July 2015 to June 2016 in 27 French centers were retrospectively reviewed...
October 19, 2017: Thyroid: Official Journal of the American Thyroid Association
https://www.readbyqxmd.com/read/29048088/synthesis-characterization-and-biological-activity-of-new-cyclometallated-platinum-iv-iodido-complexes
#16
Emma Bauer, Xavier Domingo, Cristina Balcells, Ibrahim H Polat, Margarita Crespo, Josefina Quirante, Josefa Badía, Laura Baldomà, Mercè Font-Bardia, Marta Cascante
The synthesis of six novel cyclometallated platinum(iv) iodido complexes is accomplished by intermolecular oxidative addition of methyl iodide (compounds 2a-2c) or iodine (compounds 3a-3c) upon cyclometallated platinum(ii) compounds [PtX{(CH3)2N(CH2)3NCH(4-ClC6H3)}] (1a-1c: X = Cl, CH3 or I). The X-ray molecular structures of platinum(ii) compound 1c and platinum(iv) compounds 3b and 3a' (an isomer of 3a) are reported. The cytotoxic activity against a panel of human adenocarcinoma cell lines (A-549 lung, MDA-MB-231 and MCF-7 breast, and HCT-116 colon), DNA interaction, topoisomerase I, IIα, and cathepsin B inhibition, and cell cycle arrest, apoptosis and ROS generation of the investigated complexes are presented...
October 19, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/29047253/percutaneous-drainage-and-povidone-iodine-sclerotherapy-of-cervical-lymphatic-malformation
#17
Seung Hyoung Kim, Mu Sook Lee, Gil Chai Lim, Chan Il Song
Lymphatic malformations in cases with macrocystic lesions can be treated with surgical excision or sclerotherapy using alcohol, bleomycin, doxycycline, or OK-432. We report a case of a 24-year-old woman who underwent percutaneous drainage and povidone-iodine sclerotherapy as primary treatment for cervical lymphatic malformation. The patient underwent povidone-iodine sclerotherapy for 3 consecutive days. After 8 months, ultrasonography of the lesion in the neck revealed complete resolution of the cervical lymphatic malformation without any complication...
November 2017: Yonsei Medical Journal
https://www.readbyqxmd.com/read/29047175/new-generation-agent-defeat-weapons-energetic-n-n-ethylene-bridged-polyiodoazoles
#18
Jean'ne M Shreeve, Gang Zhao, Dheeraj Kumar, Chunlin He, Joseph P Hooper, Gregory H Imler, Damon A Parrish
Sodium salts of iodine-rich pyrazole and imidazole with 1-(2-bromoethyl)-5-aminotetrazole are useful precursors for energetic N,N'-ethylene-bridged polyiodoazoles. Compounds 1 ̶ 3 were characterized with IR, and 1H and 13C NMR spectroscopy as well as elemental analyses. The molecular structures of 1 and 2 were confirmed by using single crystal X-ray diffraction. Heats of formation were calculated using Gaussian 03 and detonation properties and biocidal efficiency were calculated with CHEETAH 7. The decomposition products of 1 ̶ 3 destroy microbes more effectively than some previously reported biocides since the thermal decomposition occurs at below 400 oC without addition of oxidizer or combustion adjuvant...
October 18, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/29045934/a-comparison-of-genotoxicity-change-in-reclaimed-wastewater-from-different-disinfection-processes
#19
Qiwan Chai, Allen Hu, Yukun Qian, Xiuwei Ao, Wenjun Liu, Hongwei Yang, Yuefeng F Xie
Effluents before disinfection from four wastewater reclamation plants were treated with chlorine (Cl2), ozone (O3), chlorine dioxide (ClO2), medium-pressure ultraviolet (MPUV) and four different combinations of the above, to evaluate the effect of disinfection processes on the genotoxicity removal by the SOS/umu test. Results showed that the genotoxicity increased after MPUV irradiation (10-100 mJ/cm(2)), but declined when adopting other disinfection processes. The effectiveness of genotoxicity reduction by five chemical disinfectants was identified as: O3 > pre-ozonation with Cl2 ≈ ClO2 > combination of ClO2 and Cl2 > Cl2...
October 4, 2017: Chemosphere
https://www.readbyqxmd.com/read/29045790/three-step-synthesis-of-chiral-spirocyclic-oxaphospholenes
#20
Jan K E T Berton, Hadi Salemi, Jean-Luc Pirat, David Virieux, Christian Victor Stevens
Chiral spirocylic oxaphospholenes were prepared in a three-step sequence from chiral pool ketoterpenes. After addition of a metal acetylide, the resulting propargyl alcohols were converted stereoselectively into their allenylphosphonate counterparts. In a last step they were conveniently cyclized into spirooxaphospholenes with one equivalent of iodine without purification. When starting from sterically hindered terpenes, allenylphosphonates were also easily obtained but showed to be unreactive or rearranged under these cyclization conditions...
October 18, 2017: Journal of Organic Chemistry
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