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https://www.readbyqxmd.com/read/28742991/sexual-inactivity-and-occurrence-of-stis-in-relation-to-weight-status-in-women-two-large-population-based-studies
#1
Vibeke B Gunge, Kirsten E Juul, Adriaan Jc van den Brule, Thomas Iftner, Susanne K Kjær
The aim of this study was to examine sexual inactivity and occurrence of selected sexually transmitted infections in relation to body mass index. We used data from two large Danish population-based cross-sectional studies conducted in 1991-1995 (HPV-study: 6869 women, aged 22-32 years) and in 2004-2005 (Liva-study: 19,484 women, aged 18-45 years). Data were collected using a structured interview and measured weight, height, high-risk human papillomavirus DNA, Chlamydia DNA for the HPV-study and a structured questionnaire for the Liva-study...
July 25, 2017: Women & Health
https://www.readbyqxmd.com/read/28742964/conformational-flexibility-and-self-association-of-fibrinogen-in-concentrated-solutions
#2
Yuriy F Zuev, Rustem I Litvinov, Alexander E Sitnitsky, Bulat Z Idiyatullin, Dilyafruz R Bakirova, Dennis Galanakis, Artem Zhmurov, Valeri Barsegov, John W Weisel
We studied the hydrodynamic behavior of fibrinogen, a blood plasma protein involved in blood clotting, in a broad 0.3-60 mg/ml range of concentration and 5-42°C temperature using pulsed-field gradient 1H NMR-diffusometry. Arrhenius plots revealed the activation energy for fibrinogen diffusion Ed = 21.3 kJ/mol at 1.4 mg/ml and 28.4 kJ/mol at 38 mg/ml. We found a dramatic slowdown in fibrinogen self-diffusion with concentration beginning at 1.7-3.4 mg/ml, which deviated from the standard hard-particle behavior, suggesting a remarkable intermolecular entanglement...
July 25, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/28742961/solid-solid-phase-transitions-and-t-butyl-and-methyl-group-rotation-in-an-organic-solid-x-ray-diffractometry-differential-scanning-calorimetry-and-solid-state-1h-nuclear-spin-relaxation
#3
Peter A Beckmann, Andrew R McGhie, Arnold L Rheingold, Gilbert J Sloan, Steven T Szewczyk
Using solid state 1H nuclear magnetic resonance (NMR) spin-lattice relaxation experiments, we have investigated the effects of several solid-solid phase transitions on t-butyl group and methyl group rotation in solid 1,3,5-tri-t-butylbenzene. The goal is to relate the dynamics of the t-butyl groups and their constituent methyl groups to properties of the solid determined using single-crystal X-ray diffraction and differential scanning calorimetry (DSC). On cooling, the DSC experiments see a first-order, solid-solid phase transition at either 268 K or 155 K (but not both) depending on thermal history...
July 25, 2017: Journal of Physical Chemistry. A
https://www.readbyqxmd.com/read/28739804/role-of-the-disulfide-bond-in-stabilizing-and-folding-of-the-fimbrial-protein-drae-from-uropathogenic-escherichia-coli
#4
Justyna Pilipczuk, Beata Zalewska-Piątek, Piotr Bruździak, Jacek Czub, Milosz Wieczór, Marcin Olszewski, Marta Wanarska, Bogdan Nowicki, Danuta Augustin-Nowacka, Rafal Piątek
Dr fimbriae are homopolymeric adhesive organelles of uropathogenic Escherichia coli composed of DraE subunits, responsible for the attachment to host cells. These structures are characterized by enormously high stability resulting from the structural properties of an Ig-like fold of DraE. One feature of DraE and other fimbrial subunits that makes them peculiar among Ig-like domain-containing proteins is a conserved disulfide bond that joins their A and B strands. Here, we investigated how this disulfide bond affects the stability and folding/unfolding pathway of DraE...
July 24, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28738912/changes-in-dietary-intake-following-a-culturally-adapted-lifestyle-intervention-among-iraqi-immigrants-to-sweden-at-high-risk-of-type-2-diabetes-a-randomised-trial
#5
Faiza Siddiqui, Vicky Winther, Azra Kurbasic, Emily Sonestedt, Katarina Balcker Lundgren, Staffan Lindeberg, Peter M Nilsson, Louise Bennet
OBJECTIVE: To investigate the effectiveness of a culturally adapted lifestyle intervention for changing dietary intake, particularly energy, fat and fibre intakes, in the intervention group (IG) compared with the control group (CG). DESIGN: Randomised controlled trial. SETTING: IG (n 50) and CG (n 46). The IG was offered seven group sessions, including one cooking class, over a period of 4 months. The participants filled out 4 d food diaries at the start, mid and end of the study...
July 25, 2017: Public Health Nutrition
https://www.readbyqxmd.com/read/28737915/extended-study-on-crystal-growth-and-viscosity-in-ge-sb-se-bulk-glasses-and-thin-films
#6
Simona Martinkova, Jaroslav Barták, Petr Koštál, Jiri Malek, Hiroyo Segawa
Crystal growth rates in Ge18Sb28Se54 bulk glass and thin film were measured using optical and scanning electron microscopy under isothermal conditions. The studied temperature region was 255 - 346 °C and 254 - 286 °C for bulk glass and thin film, respectively. The compact crystalline layer growing from the surface into the amorphous core was formed in bulk glasses and no bulk crystallization was observed. In the case of thin films, needle-shape crystals were formed. The crystalline layer and needle-shape crystals grew linearly with time that corresponds to crystal growth controlled by the crystal-liquid interface kinetics...
July 24, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/28737804/modulation-of-in-out-and-out-out-conformations-in-x-x-x-phosphatranes-by-lewis-acids
#7
Goar Sánchez-Sanz, Cristina Trujillo, Ibon Alkorta, José Elguero
A theoretical study of [X.X'.X'']phosphatrane:Lewis acid complexes has been carried out in order to analyze how the in:out and out:out conformations can be modulated by the interaction with Lewis acids (LA). It has been found that in:out structures are more stable in larger systems i.e. in [4.4.3]:LA and [4.4.4]:LA than in [3.3.3]:LA and [4.3.3]:LA. The results obtained for the relative energies in conjunction with electron density properties showed that upon complexation, in:out conformers become more stable with the increasing acidity of the corresponding Lewis acid...
July 24, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28737095/impact-of-body-mass-index-on-complications-and-survival-after-surgery-for-esophageal-and-gastro-esophageal-junction-cancer
#8
I Kruhlikava, J Kirkegård, F V Mortensen, D W Kjær
BACKGROUND AND AIMS: The impact of body mass index on complications and survival in patients undergoing esophagectomy has been extensively studied with conflicting results. In this study, we assess the impact of body mass index on complications and survival following surgery for esophageal and gastro-esophageal-junction cancer in a Danish population. MATERIAL AND METHODS: We identified 285 consecutive patients, who underwent curative-intended treatment for esophageal and gastro-esophageal-junction cancer in the period 2003-2010...
March 1, 2017: Scandinavian Journal of Surgery: SJS
https://www.readbyqxmd.com/read/28736891/heat-induced-native-dimerization-prevents-amyloid-formation-by-variable-domain-from-immunoglobulin-light-chain-rei
#9
Marina Nawata, Hirotaka Tsutsumi, Yuta Kobayashi, Satoru Unzai, Shouhei Mine, Tsutomu Nakamura, Koichi Uegaki, Hironari Kamikubo, Mikio Kataoka, Daizo Hamada
Amyloid light chain (AL) amyloidosis is a protein-misfolding disease characterized by accumulation of immunoglobulin light chains (LCs) into amyloid fibrils. Dimerization of full length or variable domain (VL ) of LC serves to stabilize the native state and prevent the formation of amyloid fibrils. We here analyzed the thermodynamic properties of dimerization and unfolding reactions by nonamyloidogenic VL from REI LC or its monomeric Y96K mutant using sedimentation velocity and circular dichroism. The data indicate that the equilibrium shifts to native dimerization for wild type REI VL by elevating temperature due to the negative enthalpy change for dimer dissociation (-81...
July 24, 2017: FEBS Journal
https://www.readbyqxmd.com/read/28735599/effectiveness-of-the-metslim-lifestyle-intervention-targeting-individuals-of-low-socio-economic-status-and-different-ethnic-origins-with-elevated-waist-to-height-ratio
#10
Andrea J Bukman, Dorit Teuscher, Agnes Meershoek, Reint Jan Renes, Marleen A van Baak, Edith Jm Feskens
OBJECTIVE: To evaluate whether the lifestyle intervention MetSLIM targeting individuals of low socio-economic status of Turkish, Moroccan and Dutch origin was successful in improving waist circumference and other cardiometabolic risk factors, lifestyle behaviour and quality of life. DESIGN: A quasi-experimental intervention study (Netherlands Trial Register NTR3721). The intervention group participated in a 12-month combined dietary and physical activity programme...
July 24, 2017: Public Health Nutrition
https://www.readbyqxmd.com/read/28735530/low-temperature-oxygen-storages-of-cr-iv-cr-v-mixed-valence-ycr1-xpxo4-%C3%AE-driven-by-local-condensation-around-oxygen-deficient-orthochromite
#11
Yoshitaka Aoki, Kosuke Kuroda, Satoshi Hinokuma, Chiharu Kura, Chunyu Zhu, Etsushi Tsuji, Aiko Nakao, Makoto Wakeshima, Yukio Hinatsu, Hiroki Habazaki
The oxygen storage capability and related defect structure of tetrahedral orthochromite(V) compound YCr1-xPxO4-δ (x = 0, 0.3, 0.5 and 0.7)were investigated by employing thermal gravimetry and in situ X-tay spectrosocpy for reversible oxygen store/release by temperature cycles in the range from 50(○)C to 600(○)C. YCr1-xPxO4 started releasing oxygen as heated from 50(○)C under ambient atmosphere, with the reduction of Cr(V) to Cr(IV), while the reduced YCr1-xPxO4-δ phase was significantly reoxidized via absorbing oxygen by cooled down to 50(○)C, recovering to the original stoichiometric phase...
July 23, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28735004/trna-conjugation-with-folic-acid-chitosan-conjugates
#12
P Chanphai, H A Tajmir-Riahi
The conjugation of tRNA with folic acid-chitosan conjugates was studied, using multiple spectroscopic methods and transmission electron microscopy (TEM). Thermodynamic analysis ΔH -14 to -10 (KJ. Mol(-1)) and ΔS 14 to -1 (J. Mol(-1), K(-1)) showed tRNA-folic acid-chitosan bindings occur via H-bonding, hydrophobic and van der Waals contacts. The loading efficacy and the stability of tRNA conjugates were enhanced as folic acid-chitosan size increased. TEM analysis showed major tRNA morphological changes, upon folic acid-chitosan conjugation...
July 19, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28733925/polypropelene-mesh-properties-and-type-of-anchoring-do-not-influence-strength-of-parietal-ingrowth
#13
S Harsløf, N Zinther, T Harsløf, C Danielsen, P Wara, H Friis-Andersen
PURPOSE: In laparoscopic ventral hernia repair, parietal ingrowth of the mesh is of crucial importance. Until significant ingrowth occurs integrity of the repair depends solely on mesh overlap and anchoring device. Relatively few studies have addressed the effect of mesh properties and anchoring device on long-term parietal ingrowth. METHODS: In 20 sheep, using laparoscopy, we inserted two different polypropylene-based meshes, Physiomesh™ and Ventralight™ ST, anchored with Protack™, SecureStrap™, or Glubran™...
July 21, 2017: Langenbeck's Archives of Surgery
https://www.readbyqxmd.com/read/28733626/activation-of-dinitrogen-as-a-dipolarophile-in-1-3-dipolar-cycloadditions-a-theoretical-study-using-nitrile-imines-as-octet-1-3-dipoles
#14
M Merced Montero-Campillo, Ibon Alkorta, José Elguero
Theoretical calculations at the G4MP2 level of theory demonstrate that it is possible to activate dinitrogen to make it react in dipolar cycloadditions using neutral beryllium derivatives and other neutral metallic compounds. For the particular case of beryllium, the barrier decreases more than 40 kJ·mol(-1) with respect to the non-catalysed reaction. The activation achieved is lower than using diazonium salts (models of protonated N2), but still in a range that can be experimentally attainable.
July 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28731640/are-products-sold-in-university-vending-machines-nutritionally-poor-a-food-environment-audit
#15
Amanda Grech, Lana Hebden, Rajshri Roy, Margaret Allman-Farinelli
AIM: (i) To audit the nutritional composition, promotion and cost of products available from vending machines available to young adults; and (ii) to examine the relationship between product availability and sales. METHODS: A cross-sectional analysis of snacks and beverages available and purchased at a large urban university was conducted between March and September 2014. Sales were electronically tracked for nine months. RESULTS: A total of 61 vending machines were identified; 95% (n = 864) of the available snacks and 49% of beverages (n = 455) were less-healthy items...
April 2017: Nutrition & Dietetics: the Journal of the Dietitians Association of Australia
https://www.readbyqxmd.com/read/28731606/feasibility-of-home-based-dietetic-intervention-to-improve-the-nutritional-status-of-older-adults-post-hospital-discharge
#16
Aliza Haslinda Hamirudin, Karen Walton, Karen Charlton, Amanda Carrie, Linda Tapsell, Marianna Milosavljevic, Glen Pang, Jan Potter
AIM: To determine if a model of home-based dietetic care improves dietary intake and weight status in a specific group of older adults post-hospitalisation. METHODS: The Department of Veterans' Affairs clients aged 65 years and over were recruited from hospitals in a regional area of New South Wales, Australia (n = 32 men, n = 36 women). Nutritional status was assessed at home at baseline (within two weeks post-discharge) and three months post-discharge using a diet history, a food frequency checklist and Mini Nutritional Assessment (MNA)...
July 2017: Nutrition & Dietetics: the Journal of the Dietitians Association of Australia
https://www.readbyqxmd.com/read/28731274/synthesis-and-characterization-of-2-2-dinitramino-5-5-bi-1-oxa-3-4-diazole-and-derivatives-as-economic-and-highly-dense-energetic-materials
#17
Tobias S Hermann, Konstantin Karaghiosoff, Thomas M Klapötke, Jörg Stierstorfer
2,2'-Dinitramino-5,5'-bi(1-oxa-3,4-diazole) (2) is a new highly energetic material with superior calculated detonation performance in comparison to cyclo-1,3,5-trimethylene-2,4,6-trinitramine (RDX) and penta-erythritoltetranitrate (PETN) and can be prepared by an economical and practical two-step synthesis. The starting material 2,2'-diamino-5,5'-bi(1-oxa-3,4-diazole) (1) is synthesized by the reaction of oxalyl dihydrazide with cyanogen bromide. Nitration of 1 yields the title compound in perfect yield and purity...
July 21, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28730179/causal-neuro-immune-relationships-at-patients-with-chronic-pyelonephritis-and-cholecystitis-correlations-between-parameters-eeg-hrv-and-white-blood-cell-count
#18
Andriy B Kul'chyns'kyi, Valeriy M Kyjenko, Walery Zukow, Igor L Popovych
We aim to analyze in bounds KJ Tracey's immunological homunculus conception the relationships between parameters of electroencephalogram (EEG) and heart rate variability (HRV), on the one hand, and the parameters of bhite blood cell count, on the other hand. METHODS: In basal conditions in 23 men, patients with chronic pyelonephritis and cholecystitis in remission, recorded EEG ("NeuroCom Standard", KhAI Medica, Ukraine) and HRV ("Cardiolab+VSR", KhAI Medica, Ukraine). In portion of blood counted up white blood cell count...
2017: Open Medicine (Warsaw, Poland)
https://www.readbyqxmd.com/read/28729461/morphology-of-the-archaellar-motor-and-associated-cytoplasmic-cone-in-thermococcus-kodakaraensis
#19
Ariane Briegel, Catherine M Oikonomou, Yi-Wei Chang, Andreas Kjær, Audrey N Huang, Ki Woo Kim, Debnath Ghosal, Hong H Nguyen, Dorothy Kenny, Rachel R Ogorzalek Loo, Robert P Gunsalus, Grant J Jensen
Archaeal swimming motility is driven by archaella: rotary motors attached to long extracellular filaments. The structure of these motors, and particularly how they are anchored in the absence of a peptidoglycan cell wall, is unknown. Here, we use electron cryotomography to visualize the archaellar basal body in vivo in Thermococcus kodakaraensis KOD1. Compared to the homologous bacterial type IV pilus (T4P), we observe structural similarities as well as several unique features. While the position of the cytoplasmic ATPase appears conserved, it is not braced by linkages that extend upward through the cell envelope as in the T4P, but rather by cytoplasmic components that attach it to a large conical frustum up to 500 nm in diameter at its base...
July 19, 2017: EMBO Reports
https://www.readbyqxmd.com/read/28728003/evaluation-of-the-effects-of-low-energetic-microwave-irradiation-on-anaerobic-digestion
#20
Bert Bastiaens, Rob Van den Broeck, Lise Appels, Raf Dewil
The present study investigates the effects of microwave irradiation on the performance of anaerobic digestion processes. A first set of experiments is performed to distinguish the upper limit of the applied energy levels. Secondly, the effects of these treatments on the performance of the digestion process are evaluated in 3 experimental setups: (i) monitoring the acetic acid degradation, (ii) performing a biological methane potential (BMP) assay and (iii) conducting a specific methanogenic activity (SMA) test...
July 17, 2017: Journal of Environmental Management
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