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https://www.readbyqxmd.com/read/27908496/mixed-mode-acrylamide-based-continuous-beds-bearing-tert-butyl-groups-for-capillary-electrochromatography-synthesized-via-complexation-of-n-tert-butylacrylamide-with-a-water-soluble-cyclodextrin-part-i-retention-properties
#1
Ayat Allah Al-Massaedh, Ute Pyell
With the aim to improve the understanding of morphology and efficiency properties, we investigate in this series the impact of the complex formation constant of the hydrophobic monomer with respect to statistically methylated-β-cyclodextrin (Me-β-CD) on the electrochromatographic properties of highly crosslinked amphiphilic mixed-mode acrylamide-based monolithic stationary phases. Based on our previous work on amphiphilic mixed-mode monolithic stationary phases for capillary electrochromatography (CEC) using N-(1-adamantyl)acrylamide (Ad-AAm) as hydrophobic monomer that forms an extremely strong water-soluble inclusion complex with Me-β-CD, we now selected N-tert-butylacrylamide (NTBA) as hydrophobic monomer forming an inclusion complex with Me-β-CD with a much lower value of the formation constant...
November 21, 2016: Journal of Chromatography. A
https://www.readbyqxmd.com/read/27882369/regio-and-stereo-selective-polymerization-of-1-3-butadiene-catalyzed-by-phosphorus-nitrogen-pn-3-pincer-cobalt-ii-complexes
#2
Dirong Gong, Xuequan Zhang, Kuo-Wei Huang
A new family of cobalt complexes (CoCl2-H, CoCl2-Me, CoCl2-iPr, CoBr2-H, CoBr2-Me, CoBr2-iPr, CoI2-H, CoI2-Me, and CoI2-iPr) supported by a PN(3) ligand (6-(N,N'-di-t-butylphosphino)-2-pyrazol-yl-aminopyridine) have been prepared and fully characterized by FT-IR, elemental analysis, and X-ray analysis. The X-ray analysis reveals a trigonal bipyramidal conformation in the solid state for all representative complexes, CoCl2-H, CoBr2-H, CoBr2-iPr and CoI2-Me. The cobalt center is chelated by the PN(3) ligand through the pyridinyl nitrogen, the pyrazol nitrogen and the phosphorus donor, with a long Co-P bond distance indicating a labile character...
November 24, 2016: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/27792841/reactions-of-trimethylaluminium-modelling-the-chemical-degradation-of-synthetic-lubricants
#3
Andrew Wheatley, Jonathan Slaughter, Andrew Peel
In investigating and seeking to mimic the reactivity of trimethylaluminium (TMA) with synthetic, ester-based luricating oils the reaction of methyl propionate 1 was explored with 1, 2 and 3 eq. the organoaluminium reagent. Spectroscopic analysis points to the formation of the adduct 1(TMA) accompanied only by the low level 1:1 production of Me2AlOCEtMe2 2 and Me2AlOMe 3 when an equimolar amount of TMA is applied. The deployment of excess TMA favours reaction to give 2 and 3 over 1(TMA) adduct formation and spectroscopy reveals that in hydrocarbon solution substitution product 2 traps unreacted TMA to yield 2(TMA)...
October 28, 2016: Chemistry: a European Journal
https://www.readbyqxmd.com/read/27786290/mechanisms-on-the-morphology-variation-of-hematite-crystals-by-al-substitution-the-modification-of-fe-and-o-reticular-densities
#4
Wei Li, Xiaoliang Liang, Pengfei An, Xionghan Feng, Wenfeng Tan, Guohong Qiu, Hui Yin, Fan Liu
Al substitution in hematite is ubiquitous in soils. With the increase of Al amount, the hematite morphology changes from rhombohedral crystals to disk-shaped ones, but the underlying mechanism is poorly understood. Herein, a series of Al-substituted hematite were synthesized and characterized by synchrotron X-ray diffraction (SXRD), field emission scanning electron microscopy (FESEM), high resolution electron transmission microscopy (HRTEM) and extended X-ray absorption fine structure (EXAFS) spectroscopy, to investigate the effects of Al(3+) substitution on the hematite structure and morphology...
October 27, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27772565/validity-of-the-center-for-epidemiological-studies-depression-scale-in-type-2-diabetes
#5
Jasmine Carter, Hugo Cogo-Moreira, Nathan Herrmann, Daniel Merino, Pearl Yang, Baiju R Shah, Alex Kiss, Jaan Reitav, Paul I Oh, Walter Swardfager
OBJECTIVE: Depressive symptoms are common among people with Type 2 diabetes mellitus (T2DM). This study aimed to validate the 3-factor structure of the 14-item Center for Epidemiological Studies Depression (CES-D) scale proposed by Carleton et al. (2013) in a T2DM population. METHODS: The CES-D was administered to consecutive patients with T2DM entering a rehabilitation program. Construct validity was assessed using confirmatory factor analysis. Subscale viability, differential item functioning, and associations with clinical characteristics were tested in bifactor models...
November 2016: Journal of Psychosomatic Research
https://www.readbyqxmd.com/read/27763715/insight-into-oxide-bridged-heterobimetallic-al-zr-olefin-polymerization-catalysts
#6
Cédric Boulho, Harmen S Zijlstra, Alexander Hofmann, Peter H M Budzelaar, Sjoerd Harder
Reaction of (TBBP)AlMe⋅THF with [Cp*2 Zr(Me)OH] gave [(TBBP)Al(THF)-O-Zr(Me)Cp*2 ] (TBBP=3,3',5,5'-tetra-tBu-2,2'-biphenolato). Reaction of [DIPPnacnacAl(Me)-O-Zr(Me)Cp2 ] with [PhMe2 NH](+) [B(C6 F5 )4 ](-) gave a cationic Al/Zr complex that could be structurally characterized as its THF adduct [(DIPPnacnac)Al(Me)-O-Zr(THF)Cp2 ](+) [B(C6 F5 )4 ](-) (DIPPnacnac=HC[(Me)C=N(2,6-iPr2 -C6 H3 )]2 ). The first complex polymerizes ethene in the presence of an alkylaluminum scavenger but in the absence of methylalumoxane (MAO)...
November 21, 2016: Chemistry: a European Journal
https://www.readbyqxmd.com/read/27753860/me-01-2-assessment-and-treatment-of-morning-hypertension-update
#7
Kazuomi Kario
The essential benefit of the management of hypertension is derived from the blood pressure (BP) lowering per se, indicating the importance of BP throughout 24 hours. Recent guidelines stressed the importance of home BP for the diagnosis and management of hypertension. It is well-known that cardiovascular events occur more frequently in the morning BP levels have been shown to increase during the period from night to early morning. Clinical research using ambulatory BP monitoring (ABPM) or home BP monitoring has clarified that morning BP and BP surge are more closely related to the cardiovascular risk than office BP (Kario et al...
September 2016: Journal of Hypertension
https://www.readbyqxmd.com/read/27683083/relaxation-and-contraction-rates-underestimated-parameters-of-vascular-contractility
#8
R Schubert
No abstract text is available yet for this article.
September 28, 2016: Acta Physiologica
https://www.readbyqxmd.com/read/27643097/me-01-2-assessment-and-treatment-of-morning-hypertension-update
#9
Kazuomi Kario
The essential benefit of the management of hypertension is derived from the blood pressure (BP) lowering per se, indicating the importance of BP throughout 24 hours. Recent guidelines stressed the importance of home BP for the diagnosis and management of hypertension. It is well-known that cardiovascular events occur more frequently in the morning BP levels have been shown to increase during the period from night to early morning. Clinical research using ambulatory BP monitoring (ABPM) or home BP monitoring has clarified that morning BP and BP surge are more closely related to the cardiovascular risk than office BP (Kario et al...
September 2016: Journal of Hypertension
https://www.readbyqxmd.com/read/27630061/from-ion-like-ethylzinc-aluminates-to-etzn-arene-2-al-or-f-4-salts
#10
Thies Olaf Petersen, Dustin Simone, Ingo Krossing
Attempts to prepare previously unknown simple and very Lewis acidic [RZn](+) [Al(OR(F) )4 ](-) salts from ZnR2 , AlR3 , and HO-R(F) delivered the ion-like RZn(Al(OR(F) )4 ) (R=Me, Et; R(F) =C(CF3 )3 ) with a coordinated counterion, but never the ionic compound. Increasing the steric bulk in RZn(+) to R=CH2 CMe3 , CH2 SiMe3 , or Cp*, thus attempting to induce ionization, failed and led only to reaction mixtures including anion decomposition. However, ionization of the ion-like EtZn(Al(OR(F) )4 ) compound with arenes yielded the [EtZn(arene)2 ](+) [Al(OR(F) )4 ](-) salts with arene=toluene, mesitylene, or o-difluorobenzene (o-DFB)/toluene...
September 15, 2016: Chemistry: a European Journal
https://www.readbyqxmd.com/read/27573587/discovery-of-alkenones-with-variable-methylene-interrupted-double-bonds-implications-for-the-biosynthetic-pathway
#11
Yinsui Zheng, James T Dillon, Yifan Zhang, Yongsong Huang
Alkenones (C37 to C40 ) are highly specific biomarkers produced by certain haptophyte algae in ocean and lacustrine environments and have been widely used for paleoclimate studies. Unusual shorter-chain alkenones (e.g., C35 and C36 ) have been found in environmental and culture samples but the origin and structures of these compounds are much less understood. The marine alkenone producer, Emiliania huxleyi CCMP2758 strain was reported with abundant C35:2 Me (∆(12, 19) ) alkenone when cultured at 15°C (Prahl et al...
August 30, 2016: Journal of Phycology
https://www.readbyqxmd.com/read/27563222/protective-effects-of-silymarin-alone-or-in-combination-with-chlorogenic-acid-and-or-melatonin-against-carbon-tetrachloride-induced-hepatotoxicity
#12
Nouf Al-Rasheed, Laila Faddah, Nawal Al-Rasheed, Yieldez A Bassiouni, Iman H Hasan, Ayman M Mahmoud, Raeesa A Mohamad, Hazar I Yacoub
OBJECTIVE: The aim of this study was to evaluate the hepatoprotective effects of silymarin (SIL), alone and combined with chlorogenic acid (CA) and/or melatonin (ME), using a rat model of carbon tetrachloride (CCl4)-induced injury. MATERIALS AND METHODS: Hepatotoxicity was induced by a single dose of CCl4 (1 ml/kg, IP). One day after, rats were received SIL (200 mg/kg) alone or in combination with CA (60 mg/kg) and/or ME (20 mg/kg) for 21 days. RESULTS: SIL significantly decreased serum alanine aminotransferase, inflammatory cytokines, and vascular endothelial growth factor levels...
May 2016: Pharmacognosy Magazine
https://www.readbyqxmd.com/read/27541308/precision-assessment-of-public-attitudes-toward-genetic-testing
#13
Jun Shen
Public attitudes toward genetic testing are largely unknown. Furthermore, as medical practices vary widely among different regions around the world due to differences in cultural, sociopolitical, and economical environments, people from different regions may have drastically different attitudes. Even for the same individual, the attitude may vary depending on the purpose and type of genetic testing and the disorder to be tested for. It seems to me what is called for is a "precision" approach to gauging people's attitude toward genetic testing...
August 19, 2016: American Journal of Medical Genetics. Part A
https://www.readbyqxmd.com/read/27522462/dyslipidaemia-in-the-middle-east-current-status-and-a-call-for-action
#14
REVIEW
Khalid Al Rasadi, Wael Almahmeed, Khalid F AlHabib, Marianne Abifadel, Hasan Ali Farhan, Saud AlSifri, Selim Jambart, Mohammad Zubaid, Zuhier Awan, Khalid Al-Waili, Philip Barter
The increase in the cardiovascular disease (CVD)-associated mortality rate in the Middle East (ME) is among the highest in the world. The aim of this article is to review the current prevalence of dyslipidaemia and known gaps in its management in the ME region, and to propose initiatives to address the burden of dyslipidaemia. Published literature on the epidemiology of dyslipidaemia in the ME region was presented and discussed at an expert meeting that provided the basis of this review article. The high prevalence of metabolic syndrome, diabetes, familial hypercholesterolaemia (FH) and consanguineous marriages, in the ME region, results in a pattern of dyslipidaemia (low high-density lipoprotein cholesterol and high triglycerides) that is different from many other regions of the world...
September 2016: Atherosclerosis
https://www.readbyqxmd.com/read/27521121/pavkov-me-weil-ej-fufaa-gd-et%C3%A2-al-tumor-necrosis-factor-receptors-1-and-2-are-associated-with-early-glomerular-lesions-in-type-2-diabetes-kidney-int-2016-89-226-234
#15
(no author information available yet)
No abstract text is available yet for this article.
September 2016: Kidney International
https://www.readbyqxmd.com/read/27492852/yttrium-siloxide-complexes-bearing-terminal-methyl-ligands-molecular-models-for-ln-ch3-terminated-silica-surfaces
#16
Nicole Dettenrieder, H Martin Dietrich, Cäcilia Maichle-Mössmer, Reiner Anwander
Surface organometallic chemistry (SOMC) on silica materials is a prominent approach for the generation of highly active heterogenized polymerization catalysts. Despite advanced methods of characterization, the elucidation of the catalytically active surface species remains a challenging task. Alkylated rare-earth metal siloxide complexes can be regarded as molecular models of respective covalently bonded alkylated surface species, primarily used for 1,3-diene polymerization. Here, we performed both salt metathesis reactions of [Y(MMe4 )3 ] (M = Al, Ga) with [K{OSi(OtBu)3 }] and alkylation reactions of [Y{OSi(OtBu)3 }3 ]2 with AlMe3 ...
September 5, 2016: Chemistry: a European Journal
https://www.readbyqxmd.com/read/27485729/mediating-pathways-between-parental-socio-economic-position-and-allostatic-load-in-mid-life-findings-from-the-1958-british-birth-cohort
#17
Cristina Barboza Solís, Romain Fantin, Raphaële Castagné, Thierry Lang, Cyrille Delpierre, Michelle Kelly-Irving
Understanding how human environments affect our health by "getting under the skin" and penetrating the cells, organs and physiological systems of our bodies is a key tenet in public health research. Here, we examine the idea that early life socioeconomic position (SEP) can be biologically embodied, potentially leading to the production of health inequalities across population groups. Allostatic load (AL), a composite measure of overall physiological wear-and-tear, could allow for a better understanding of the potential biological pathways playing a role in the construction of the social gradient in adult health...
September 2016: Social Science & Medicine
https://www.readbyqxmd.com/read/27461475/effect-of-partial-replacement-of-alfalfa-hay-with-moringa-species-leaves-on-milk-yield-and-composition-of-najdi-ewes
#18
Elfadıl E Babiker, Fahad Al Juhaimi, Kashif Ghafoor, H E Mohamed, Khalid A Abdoun
The present study was carried out to investigate changes in milk yield and composition of Najdi ewes fed 25 % Moringa oleifera (MOD) or Moringa peregrina (MPD) leaf diets as a supplement to alfalfa hay diet (AHD). Thirty ewes (average 55 kg, 2 years old) were randomly sorted into three experimental groups with 10 animals each and were fed for a 6-week period with these diets (AHD, MOD, or MPD). Diets dry matter, crude protein, and crude fiber were comparable, while fat, nitrogen-free extract (NFE), neutral detergent fiber (NDF), acid detergent fiber (ADF), metabolizable energy (ME), total phenolic, and antioxidant activity varied (p ≤ 0...
October 2016: Tropical Animal Health and Production
https://www.readbyqxmd.com/read/27458325/thermoreversible-and-injectable-abc-polypeptoid-hydrogels-controlling-the-hydrogel-properties-through-molecular-design
#19
Sunting Xuan, Chang-Uk Lee, Cong Chen, Andrew B Doyle, Yueheng Zhang, Li Guo, Vijay T John, Daniel Hayes, Donghui Zhang
A series of ABC triblock copolypeptoids [i.e., poly(N-allyl glycine)-b-poly(N-methyl glycine)-b-poly(N-decyl glycine) (AMD)] with well-defined structure and varying composition have been synthesized by sequential primary amine-initiated ring-opening polymerization of the corresponding N-substituted N-carboxyanhydride monomers (Al-NCA, Me-NCA, and De-NCA). The ABC block copolypeptoids undergo sol-to-gel transitions with increasing temperature in water and biological media at low concentrations (2.5-10 wt %)...
February 9, 2016: Chemistry of Materials: a Publication of the American Chemical Society
https://www.readbyqxmd.com/read/27396409/isoprene-polymerization-mediated-by-vanadium-onno-complexes
#20
Yupin Phuphuak, Fanny Bonnet, Laure Vendier, Christian Lorber, Philippe Zinck
A series of vanadium complexes bearing dianionic tetradentate amine-bisphenolate [ONNO] ligands, V([double bond, length as m-dash]O)X[ONNO(Me)] (X = Cl (1); O(i)Pr (2)), VCl2[ONNO(Me)] (3) and V(O(i)Pr)2[ONNO(R)] (R = Me (4), (t)Bu (5), Cl (6)), displaying various electronic and steric properties have been prepared. The molecular structures of two of these complexes, namely V[ONNO(R)](O(i)Pr)2 with R = (t)Bu (5) or Cl (6), are reported. Activated with dialkylmagnesium, all complexes lead to modest isoprene homo-polymerization activities at 50 °C...
July 26, 2016: Dalton Transactions: An International Journal of Inorganic Chemistry
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