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https://www.readbyqxmd.com/read/28941414/synthesis-spectral-and-luminescence-study-crystal-structure-determination-and-dft-calculation-of-binuclear-palladium-ii-complexes
#1
S Seyfi, R Alizadeh, M Darvish Ganji, V Amani
Binuclear palladium(II) complexes with metal-metal (d(8)-d(8)) bonding interaction were synthesized by reactions of the 1-methyl-1H-1,2,3,4-tetrazole-5-thiol (Hmtzt) or a mixture of Hmtzt and 1,3-propanediamine (1,3-pda) ligands. Complex [Pd2(μ-mtzt)4]·2CH3CN (1) was synthesized by the reaction of Pd(OAc)2 with Hmtzt dissolved in acetonitrile and complex [Pd2(μ-mtzt)2(mtzt)2(1,3-pda)] (2) was synthesized by reaction of a mixture of Hmtzt and 1,3-propanediamine (dissolved in methanol) with PdCl2 (dissolved in acetonitrile) and were identified through elemental analysis, IR, UV-Vis, (1)H NMR, luminescence spectroscopy as well as single-crystal X-ray diffraction method...
September 14, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/28941402/copper-ii-ions-interactions-in-the-systems-with-triamines-and-atp-potentiometric-and-spectroscopic-studies
#2
S K Hoffmann, J Goslar, R Bregier-Jarzebowska, A Gasowska, A Zalewska, L Lomozik
The mode of interaction and thermodynamic stability of complexes formed in binary and ternary Cu(II)/ATP/triamines systems were studied using potentiometric and spectroscopic (NMR, EPR, UV-Vis) methods. It was found that in binary metal-free systems ATP/HxPA species are formed (PA: Spd=spermidine or 3,3-tri=1,7-diamino-4-azaheptane) where the phosphate groups from nucleotides are preferred negative centers and protonated amine groups of amines are positive centers of reaction. In the ternary systems Cu/ATP/Hx(PA) as well as Cu/(ATP)(PA) species are formed...
September 9, 2017: Journal of Inorganic Biochemistry
https://www.readbyqxmd.com/read/28938749/the-testicular-transcriptome-associated-with-spermatogonia-differentiation-initiated-by-gonadotrophin-stimulation-in-the-juvenile-rhesus-monkey-macaca-mulatta
#3
Suresh Ramaswamy, William H Walker, Paula Aliberti, Rahil Sethi, Gary R Marshall, Alyxzandria Smith, Seyedmehdi Nourashrafeddin, Alicia Belgorosky, Uma R Chandran, Mark P Hedger, Tony M Plant
STUDY QUESTION: What is the genetic landscape within the testis of the juvenile rhesus monkey (Macaca mulatta) that underlies the decision of undifferentiated spermatogonia to commit to a pathway of differentiation when puberty is induced prematurely by exogenous LH and FSH stimulation? SUMMARY ANSWER: Forty-eight hours of gonadotrophin stimulation of the juvenile monkey testis resulted in the appearance of differentiating B spermatogonia and the emergence of 1362 up-regulated and 225 down-regulated testicular mRNAs encoding a complex network of proteins ranging from enzymes regulating Leydig cell steroidogenesis to membrane receptors, and from juxtacrine and paracrine factors to transcriptional factors governing spermatogonial stem cell fate...
October 1, 2017: Human Reproduction
https://www.readbyqxmd.com/read/28938642/facile-total-synthesis-of-lysicamine-and-the-anticancer-activities-of-the-ru-ii-rh-iii-mn-ii-and-zn-ii-complexes-of-lysicamine
#4
Jiao-Lan Qin, Ting Meng, Zhen-Feng Chen, Xiao-Li Xie, Qi-Pin Qin, Xiao-Ju He, Ke-Bin Huang, Hong Liang
Lysicamine is a natural oxoaporphine alkaloid, which isolated from traditional Chinese medicine (TCM) herbs and has been shown to possess cytotoxicity to hepatocarcinoma cell lines. Reports on its antitumor activity are scarce because lysicamine occurs in plants at a low content. In this work, we demonstrate a facile concise total synthesis of lysicamine from simple raw materials under mild reaction conditions, and the preparation of the Ru(II), Rh(III), Mn(II) and Zn(II) complexes 1-4 of lysicamine (LY). All the compounds were fully characterized by elemental analysis, IR, ESI-MS, (1)H and (13)C NMR, as well as single-crystal X-ray diffraction analysis...
August 29, 2017: Oncotarget
https://www.readbyqxmd.com/read/28938401/n-glycomic-profiling-of-pheochromocytomas-and-paragangliomas-separates-metastatic-and-non-metastatic-disease
#5
Helena Leijon, Tuomas Kaprio, Annamari Heiskanen, Tero Satomaa, Jukka O Hiltunen, Markku M Miettinen, Johanna Arola, Caj Haglund
Context: No effective methods for separating primary pheochromocytomas and paragangliomas with metastatic potential are currently available. The identification of specific asparagine-linked glycan (N-glycan) structures, which are associated with metastasized pheochromocytomas and paragangliomas, may serve as a new diagnostic tool. Objective: To identify differences in N-glycomic profiles of primary metastasized and non-metastasized pheochromocytomas and paragangliomas...
August 17, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28938250/listening-effort-how-the-cognitive-consequences-of-acoustic-challenge-are-reflected-in-brain-and-behavior
#6
Jonathan E Peelle
Everyday conversation frequently includes challenges to the clarity of the acoustic speech signal, including hearing impairment, background noise, and foreign accents. Although an obvious problem is the increased risk of making word identification errors, extracting meaning from a degraded acoustic signal is also cognitively demanding, which contributes to increased listening effort. The concepts of cognitive demand and listening effort are critical in understanding the challenges listeners face in comprehension, which are not fully predicted by audiometric measures...
September 21, 2017: Ear and Hearing
https://www.readbyqxmd.com/read/28938124/the-kinetochore-receptor-for-the-cohesin-loading-complex
#7
Stephen M Hinshaw, Vasso Makrantoni, Stephen C Harrison, Adèle L Marston
The ring-shaped cohesin complex brings together distant DNA domains to maintain, express, and segregate the genome. Establishing specific chromosomal linkages depends on cohesin recruitment to defined loci. One such locus is the budding yeast centromere, which is a paradigm for targeted cohesin loading. The kinetochore, a multiprotein complex that connects centromeres to microtubules, drives the recruitment of high levels of cohesin to link sister chromatids together. We have exploited this system to determine the mechanism of specific cohesin recruitment...
September 21, 2017: Cell
https://www.readbyqxmd.com/read/28938102/self-management-support-at-the-end-of-life-patients-carers-and-professionals-perspectives-on-managing-medicines
#8
N Campling, A Richardson, M Mulvey, M Bennett, B Johnston, S Latter
BACKGROUND: Pain is a frequently reported symptom by patients approaching the end of life and well-established that patients and carers hold fears relating to opioids, and experience side effects related to their use. The management of medicines is intrinsic to achieving effective pain relief. The concept of self-management support whilst well characterised in the context of chronic illness has not been elaborated with respect to end of life care. AIM: To identify patient, carer and professional views on the concept of self-management support at end of life, specifically in relation to analgesia and related medicines (for side-effect management) in order to describe, characterise and explain self-management support in this context...
September 6, 2017: International Journal of Nursing Studies
https://www.readbyqxmd.com/read/28937963/ki67-and-lymphocytes-in-the-pretherapeutic-core-biopsy-of-primary-invasive-breast-cancer-positive-markers-of-therapy-response-prediction-and-superior-survival
#9
REVIEW
Claus M Schlotter, Lothar Tietze, Ulf Vogt, Carlos Villena Heinsen, Antje Hahn
Background Core needle biopsy plays a crucial role as diagnostic tool for BC. Both Ki67 and likely tumor-infiltrating lymphocytes (TILs) in the near future are determining the kind of systemic therapy. The role of TILs in BC is still an issue for clinical research, albeit preliminary results of neoadjuvant and adjuvant clinical studies already now highlight the crucial impact of TILs on therapy response and survival. Methods Evaluation of related publications (pubmed) and meeting abstracts (ASCO, SABCS). Results The monoclonal antibody Ki67 recognizing a nuclear antigene in proliferating cells is a positive marker of therapy response and superior survival...
September 22, 2017: Hormone Molecular Biology and Clinical Investigation
https://www.readbyqxmd.com/read/28937949/international-vision-care-issues-and-approaches
#10
Rohit C Khanna, Srinivas Marmamula, Gullapalli N Rao
Globally, 32.4 million individuals are blind and 191 million have moderate or severe visual impairment (MSVI); 80% of cases of blindness and MSVI are avoidable. However, great efforts are needed to tackle blindness and MSVI, as eye care in most places is delivered in isolation from and without significant integration with general health sectors. Success stories, including control of vitamin A deficiency, onchocerciasis, and trachoma, showed that global partnerships, multisectoral collaboration, public-private partnerships, corporate philanthropy, support from nongovernmental organizations-both local and international-and governments are responsible for the success of these programs...
September 15, 2017: Annual Review of Vision Science
https://www.readbyqxmd.com/read/28937790/the-doctor-of-philosophy-experience-of-athletic-trainers-facilitators-and-barriers-to-anticipatory-faculty-socialization
#11
Thomas Bowman, Joanne Klossner, Stephanie Mazerolle
CONTEXT:   It is important to understand the process whereby athletic trainers learn about their future roles, particularly when the roles can be complex and demanding. Little is known about the experiences of athletic training doctoral students, including facilitators and barriers to socialization as aspiring faculty members. OBJECTIVE:   To investigate factors influencing the anticipatory socialization of athletic training doctoral students into future faculty roles...
September 22, 2017: Journal of Athletic Training
https://www.readbyqxmd.com/read/28937773/probing-the-hiv-1-ncp7-nucleocapsid-protein-with-site-specific-gold-i-phosphine-complexes
#12
Raphael E F de Paiva, Zhifeng Du, Erica J Peterson, Pedro P Corbi, Nicholas P Farrell
In this work, we examined a series of thiophilic Au(I) compounds based on [Au(L)(PR3)] (L = Cl(-), 4-dimethylaminopyridine (dmap); R= ethyl (Et), cyclohexyl (Cy)) for chemoselective auration of the C-terminal HIV nucleocapsid protein NCp7 F2 and the "full" HIV NCp7 (NC, zinc finger (ZnF)) as probes of nucleocapsid topography. The choice of phosphine allowed electronic and steric effects to be considered. The use of the heterocycle "leaving group" allowed us to study the effect of possible π-stacking with the essential tryptophan residue of NC on the reactivity and selectivity, mimicking the naturally occurring interaction between the zinc finger and nucleic acids...
September 22, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28937759/copper-ii-chloro-complex-formation-thermodynamics-and-structure-in-ionic-liquid-1-butyl-3-methylimidazolium-trifluoromethanesulfonate
#13
Ryo Kanzaki, Shuma Uchida, Hitoshi Kodamatani, Takashi Tomiyasu
Metal ions in ionic liquids are laid under an unprecedented reaction field. In order to assess the reaction thermodynamics of metal ions in such a situation, Cu(2+)-chloro complex formation was examined with spectroscopic and calorimetric titrations in an ionic liquid, 1-buthyl-3-methylimidazolium trifluoromethanesulfonate (C4mimTfO). In addition, the effect of the structure of the solvated complexes on the complexation mechanism was investigated with the aid of DFT calculations. Chloro complexation successively proceeded and finally provided a [CuCl4](2‒) species, which is also the final product in conventional molecular solvents...
September 22, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/28937756/direct-comparison-of-c-h-bond-amination-efficacy-through-manipulation-of-nitrogen-valence-centered-redox-imido-versus-iminyl
#14
Matthew J T Wilding, Diana A Iovan, Alexandra T Wrobel, James T Lukens, Samantha N MacMillan, Kyle M Lancaster, Theodore A Betley
Reduction of previously reported iminyl radical (ArL)FeCl(•N(C6H4-p-tBu)) (2) with potassium graphite furnished the corresponding high-spin (S = 5/2) imido (ArL)Fe(N(C6H4-p-tBu)) (3) (ArL = 5-mesityl-1,9-(2,4,6-Ph3C6H2)dipyrrin). Oxidation of the three-coordinate imido (ArL)Fe(NAd) (5) with chlorotriphenylmethane afforded (ArL)FeCl(•NAd) (6) with concomitant expulsion of Ph3C(C6H5)CPh2. The respective alkyl/aryl imido/iminyl pairs (3, 2; 5, 6) have been characterized by EPR, zero-field 57Fe Mössbauer, magnetometry, single crystal X-ray diffraction, XAS, and EXAFS for 6...
September 22, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28937745/mononuclear-fe-ii-complexes-based-on-the-methylpyrazinyl-diamine-ligand-chemical-thermo-and-photocontrol-of-their-magnetic-switchability
#15
Xue Liu, Jian Zhou, Xin Bao, Zheng Yan, Guo Peng, Mathieu Rouzières, Corine Mathonière, Jun-Liang Liu, Rodolphe Clérac
Two new mononuclear Fe(II) complexes, [Fe((2Me)Lpz)(NCX)2] (L = N,N'-dimethyl-N,N'-bis((pyrazin-2-yl)methyl)-1,2-ethanediamine and X = S (1), BH3 (2)), have been synthesized and characterized by single-crystal X-ray diffraction, magnetic, optical reflectivity, and photomagnetic measurements. They have similar FeN6 coordination environments offered by the tetradentate ligand with a cis-α conformation and two NCX(-) coligands in cis positions. However, 1 and 2 have different molecular arrangements and crystal packings, and are isolated in orthorhombic Pbnb and monoclinic C2/c space groups, respectively...
September 22, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28937695/trinuclear-complexes-of-palladium-ii-with-chalcogenated-n-heterocyclic-carbenes-catalysis-of-selective-nitrile-primary-amide-interconversion-and-sonogashira-coupling
#16
Pooja Dubey, Sonu Gupta, Ajai K Singh
3-Methyl-1-(2-(phenylthio/seleno)ethyl)-1H-benzo[d]imidazol-3-ium iodide (L1/L2), a precursor of sulfated/selenated N-heterocyclic carbene, was synthesized by the reaction of benzimidazole with 1,2-dichloroethane followed by treatment with PhS/SeNa and MeI. The reaction of L1/L2 with Ag2O followed by treatment with [Pd(CH3CN)2Cl2] (metal to ligand ratio 3 : 2), i.e. transmetallation, resulted in trinuclear palladium(ii) complexes [Pd3(L1/L2-HI)2(CH3CN)Cl6] (1-2). The complexes were characterized with (1)H, (13)C{(1)H} and (77)Se{(1)H} NMR (2 only), elemental analyses, HR-MS and single-crystal X-ray diffraction...
September 22, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28937669/in-situ-solid-state-nmr-and-xrd-studies-of-the-ador-process-and-the-unusual-structure-of-zeolite-ipc-6
#17
Samuel A Morris, Giulia P M Bignami, Yuyang Tian, Marta Navarro, Daniel S Firth, Jiří Čejka, Paul S Wheatley, Daniel M Dawson, Wojciech A Slawinski, David S Wragg, Russell E Morris, Sharon E Ashbrook
The assembly-disassembly-organization-reassembly (ADOR) mechanism is a recent method for preparing inorganic framework materials and, in particular, zeolites. This flexible approach has enabled the synthesis of isoreticular families of zeolites with unprecedented continuous control over porosity, and the design and preparation of materials that would have been difficult-or even impossible-to obtain using traditional hydrothermal techniques. Applying the ADOR process to a parent zeolite with the UTL framework topology, for example, has led to six previously unknown zeolites (named IPC-n, where n = 2, 4, 6, 7, 9 and 10)...
October 2017: Nature Chemistry
https://www.readbyqxmd.com/read/28937409/development-and-feasibility-of-self-management-application-in-left-ventricular-assist-devices
#18
Jesus M Casida, James E Aikens, Heidi Craddock, Matthew W Aldrich, Francis D Pagani
Despite major advancements in mechanical circulatory support, the self-management (SM) for patients with a left-ventricular assist device (LVAD) remains complex and challenging for patients and their caregivers. We have developed a mobile phone application (VAD Care App) to organize and simplify the LVAD SM process. This article describes the development and feasibility study of the app as an SM tool for LVAD patients and caregivers requiring support from ventricular assist device (VAD) coordinators. The specific aim was to evaluate the app's acceptability and usability and the users' competency...
September 20, 2017: ASAIO Journal: a Peer-reviewed Journal of the American Society for Artificial Internal Organs
https://www.readbyqxmd.com/read/28937175/chiral-six-coordinate-dy-iii-and-tb-iii-complexes-of-an-achiral-ligand-structure-fluorescence-and-magnetism
#19
Mei-Jiao Liu, Juan Yuan, Yi-Quan Zhang, Hao-Ling Sun, Cai-Ming Liu, Hui-Zhong Kou
Two new chiral six-coordinate lanthanide complexes (1 for Dy and 2 for Tb) have been synthesized using the achiral flexible ligand H2L (2,2'-[1,2-ethanediylbis[(methylimino)methylene]]bis[4,5-dimethylphenol]). Both complexes crystallize in the chiral P1 group space, and the enantiomers [Zn(L)Cl]3Dy·MeOH·0.5H2O (Λ-1), [Zn(L)Cl]3Dy·1.5H2O (Δ-1), [Zn(L)Cl]3Tb·1.5H2O (Λ-2) and [Zn(L)Cl]3Tb·H2O (Δ-2) are isolated in the reaction. Three [Zn(L)Cl](-) anions coordinate to the central lanthanide ion using two phenoxo oxygen atoms of L(2-), and the lanthanide ion has the coordination geometry of D3...
September 22, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28937174/tantallacyclopentadiene-as-a-unique-metal-containing-diene-ligand-coordinated-to-nickel-for-preparing-tantalum-nickel-heterobimetallic-complexes
#20
Payel Laskar, Keishi Yamamoto, Anga Srinivas, Alexis Mifleur, Haruki Nagae, Hayato Tsurugi, Kazushi Mashima
A mononuclear tantallacyclopentadiene complex, TaCl3(C4H2tBu2) (3), serves as a unique ligand to nickel: the addition of Ni(COD)2 to 3 selectively afforded heterobimetallic Ta-Ni complex 4. The cyclooctadiene ligand bound to the nickel center in complex 4 was readily substituted by monodentate and bidentate phosphine ligands, such as dimethylphenylphosphine, 1,2-bis(diphenylphosphino)ethane, and 1,2-bis(diethylphosphino)ethane, to give the corresponding phosphine complexes 5, 6a, and 6b. We also examined a ligand substitution reaction with 1,3-bis(2,6-diisopropylphenyl)imidazol-2-ylidene (IPr) to produce the corresponding Ta-Ni complex 7...
September 22, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
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