Structural Evolution of GaOx-Shell and Intermetallic Phases in Ga-Pt Supported Catalytically Active Liquid Metal Solutions.

We present a comprehensive scale-bridging characterization approach for supported catalytically active liquid metal solutions (SCALMS) which combines lab-based X-ray microscopy, nano X-ray computed tomography (nano-CT), and correlative analytical transmission electron microscopy. SCALMS catalysts consist of low-melting alloy particles and have demonstrated high catalytic activity, selectivity, and long-term stability in propane dehydrogenation (PDH). We established an identical-location nano-CT workflow which allows us to reveal site-specific changes of Ga-Pt SCALMS before and after PDH. These observations are complemented by analytical transmission electron microscopy investigations providing information on the structure, chemical composition, and phase distribution of individual SCALMS particles. Key findings of this combined microscopic approach include (i) structural evolution of the SCALMS particles' GaOx shell, (ii) Pt segregation toward the oxide shell leading to the formation of Ga-Pt intermetallic phases, and (iii) cracking of the oxide shell accompanied by the release of liquid Ga-Pt toward the porous support.

A Mediterranean-style diet, its components and the risk of heart failure: a prospective population-based study in a non-Mediterranean country.

BACKGROUND/OBJECTIVES: Growing evidence emerged about the role of diet in heart failure (HF) development, but data are sparse and inconclusive. We examined the association between a Mediterranean-style diet, its components and HF risk. SUBJECTS/METHODS: Analyses were carried out in 24 008 middle-aged participants of the European Prospective Investigation into Cancer and Nutrition (EPIC)-Potsdam (Germany), including 209 incident HF cases within 8.2 years. The traditional Greek Mediterranean diet score (tMED) was used to assess dietary adherence. Cox's proportional hazards regression was applied to estimate the relationship between the adherence to the Mediterranean-style diet, its components and HF risk. RESULTS: After adjustment for age, sex and energy intake, a 2-unit increment in the tMED was associated with 26% lower risk of HF (HR (95% confidence interval (CI)): 0.76 (0.60-0.97)). After multivariable adjustment, this association was slightly attenuated and lost significance [HR (95%CI): 0.82 (0.64-1.05)]. Interestingly, we observed a significant association in multivariable adjusted models when milk products were excluded from the score (HR (95% CI): 0.75 (0.59-0.96)). Three score components were significantly associated with HF risk: alcohol (HR (95%CI): 0.73 (0.55-0.97) for moderate versus low/high intakes), meat: 2.04 (1.17-3.55) and fish: 0.59 (0.36-0.95), both for the highest versus the lowest quintile. CONCLUSIONS: The tMED was not significantly associated with HF risk, but low meat, high fish and moderate alcohol intake were inversely associated with HF risk in our non-Mediterranean population. Minor dietary changes could be valuable primary prevention measures, particularly the increase of fish consumption while reducing the intake of meat.

Vitamin D status and associated factors of deficiency among Jordanian children of preschool age.

BACKGROUND/OBJECTIVES: Vitamin D deficiency in children remains a global concern. Although literature exists on the vitamin D status and its risk factors among children in the Middle East, findings have yielded mixed results, and large, representative community studies are lacking. SUBJECTS/METHODS: In a nationally representative survey of 1077 Jordanian children of preschool age (12-59 months) in Spring 2010, we measured 25(OH)D3 concentrations by liquid chromatography-tandem mass spectrometry and calculated prevalence ratios for deficiency associated with various factors. RESULTS: RESULTS showed 19.8% (95% confidence interval (CI): 16.4-23.3%) deficiency (<12 ng/ml) and 56.5% (95% CI: 52.0-61.0%) insufficiency (<20 ng/ml). In adjusted models, prevalence of deficiency was higher for females compared with males (prevalence ratio (PR)=1.74, 95% CI: 1.22-2.47, P=0.002) and lower for children 24-35 months of age (PR=0.64, 95% CI: 0.44-0.92, P=0.018) compared with children 12-23 months of age. In rural areas, there was no difference in prevalence of vitamin D deficiency between those whose mothers had/did not have vitamin D deficiency (P=0.312); however, in urban areas, prevalence of vitamin D deficiency was 3.18 times greater among those whose mothers were vitamin D deficient compared with those whose mothers were not deficient (P=0.000). CONCLUSIONS: Vitamin D deficiency and insufficiency pose significant public health problems in Jordanian children with female children disproportionately affected. Strong associations between vitamin D status in children and urban residency and maternal vitamin D status suggest that the behaviors related to sun exposure in urban mothers likely also affect the sun exposure and thus vitamin D status of their children.

Micronutrient status in Jordan: 2002 and 2010.

BACKGROUND/OBJECTIVES: Two national surveys were conducted in Jordan in 2002 and 2010 to investigate the micronutrient status in women and children. To determine the prevalence of anemia, iron and folate deficiency among women and children in 2010 and compare with the prevalence of anemia and iron deficiency in 2002. SUBJECTS/METHODS: A nationally representative survey was conducted in 2002 (1023 women, 15-49 years of age; 1059 children, 12-59 months of age) and a second survey in 2010 (2035 women; 940 children). Venous blood samples were used to measure hemoglobin, ferritin and red blood cell folate (the latter on a subsample of 393 women). RESULTS: Among women in 2010, the prevalence of folate deficiency and insufficiency was 13.6% and 82.9%, respectively. Geometric mean serum ferritin was higher in 2010 compared with 2002 (21.3 ng/ml vs 18.3, P=0.01); there was no significant change in the prevalence of iron deficiency (35.1% vs 38.7%, P=0.17), iron deficiency anemia (19.1% vs 20.0%, P=0.61) or anemia (29.2% vs 29.3%, P=0.96). Among children, a significantly lower prevalence was observed in 2010 compared with 2002 for iron deficiency (13.7% vs 26.2% P<0.001) and iron deficiency anemia (4.8% vs 10.1%, P<0.001); a nonsignificant lower prevalence was observed for anemia (16.6% vs 20.2%, P=0.09). CONCLUSIONS: In 2010, approximately one of seven women was folate deficient and six out of seven were folate insufficient for the prevention of neural tube defects. Between 2002 and 2010, significant improvement was observed in the prevalence of iron deficiency in children, but not in women.

Plasmonically enhanced electron escape from gold nanoparticles and their polarization-dependent excitation transfer along DNA nanowires.

Here we show plasmon mediated excitation transfer along DNA nanowires over up to one micrometer. Apparently, an electron excitation is initiated by a femtosecond laser pulse that illuminates gold nanoparticles (AuNP) on double stranded DNA (dsDNA). The dependency of this excitation on laser wavelength and polarization are investigated. Excitation of the plasmon resonance of the AuNPs via one- and two-photon absorption at 520 and 1030 nm, respectively, was explored. We demonstrate an excitation transfer along dsDNA molecules at plasmon supported four-photon excitation of AuNP cluster or at laser field driven nanoparticle electron tunneling for an alignment of the attached dsDNA to the polarization of the electric field of the laser light. These results extend the previously observed plasmonically induced three-photon excitation transfer along DNA nanowires to another nanoparticle material (gold) and the adapted irradiation wavelengths.

Evaluation of oxygen exposure levels and polyphenolic content of red wines using an electronic panel formed by an electronic nose and an electronic tongue.

An electronic panel formed by an electronic nose and an electronic tongue has been used to analyse red wines showing high and low phenolic contents, obtained by flash release and traditional soaking, respectively, and processed with or without micro-oxygenation. Four oxygen transfer rate conditions (0.8, 1.9, 8.0, and 11.9 µl oxygen/bottle/day) were ensured by using synthetic closures with controlled oxygen permeability and storage under controlled atmosphere. Twenty-five chemical parameters associated with the polyphenolic composition, the colour indices and the levels of oxygen were measured in triplicate and correlated with the signals registered (seven replicas) by means of the electronic nose and the electronic tongue using partial least squares regression analysis. The electronic nose and the electronic tongue showed particularly good correlations with those parameters associated with the oxygen levels and, in particular, with the influence of the porosity of the closure to oxygen exposure. In turn, the electronic tongue was particularly sensitive to redox species including oxygen and phenolic compounds. It has been demonstrated that a combined system formed from the electronic nose and the electronic tongue provides information about the chemical composition of both the gas and the liquid phase of red wines. This complementary information improves the capacity to predict values of oxygen-related parameters, phenolic content and colour parameters.

Tuning of spectral and angular distribution of scattering from single gold nanoparticles by subwavelength interference layers.

Localized surface plasmon resonance (LSPR) as the resonant oscillation of conduction electrons in metal nanostructures upon light irradiation is widely used for sensing as well as nanoscale manipulation. The spectral resonance band position can be controlled mainly by nanoparticle composition, size, and geometry and is slightly influenced by the local refractive index of the near-field environment. Here we introduce another approach for tuning, based on interference modulation of the light scattered by the nanostructure. Thereby, the incoming electric field is wavelength-dependent modulated in strength and direction by interference due to a subwavelength spacer layer between nanoparticle and a gold film. Hence, the wavelength of the scattering maximum is tuned with respect to the original nanoparticle LSPR. The scattering wavelength can be adjusted by a metallic mirror layer located 100-200 nm away from the nanoparticle, in contrast to near-field gap mode techniques that work at distances up to 50 nm in the nanoparticle environment. Thereby we demonstrate, for the first time at the single nanoparticle level, that dependent on the interference spacer layer thickness, different distributions of the scattered signal can be observed, such as bell-shaped or doughnut-shaped point spread functions (PSF). The tuning effect by interference is furthermore applied to anisotropic particles (dimers), which exhibit more than one resonance peak, and to particles which are moved from air into the polymeric spacer layer to study the influence of the distance to the gold film in combination with a change of the surrounding refractive index.

Vitamin D status and determinants of deficiency among non-pregnant Jordanian women of reproductive age.

BACKGROUND/OBJECTIVES: Vitamin D deficiency, a risk factor for osteomalacia and osteoporosis, is a re-emerging health problem globally. While sunlight is an important vitamin D source, previous investigations among women whose culture encourages skin covering have been small, not nationally representative, or both. We investigated serum 25-hydroxyvitamin D (25(OH)D(3)) status and factors associated with deficiency in a nationally representative survey of 2013 Jordanian women of reproductive age in Spring 2010. SUBJECTS/METHODS: We measured 25(OH)D(3) concentrations by liquid chromatography-tandem mass spectrometry and calculated prevalence ratios for deficiency associated with skin covering and other factors. RESULTS: Results showed 60.3% (95% CI: 57.1-63.4%) deficiency (<12 ng/ml) and 95.7% (95% CI: 94.4-96.8%) insufficiency (<20 ng/ml) among women. Prevalence of deficiency was 1.60 times higher for women who covered with a scarf/hijab (95% CI: 1.06-2.40, P = 0.024) and 1.87 times higher for women who wore full cover, or a niqab (95% CI: 1.20-2.93, P = 0.006), compared with the women who did not wear a scarf/hijab or niqab. Compared with rural women completing at least secondary education, prevalence of deficiency was 1.30 times higher for urban women of the same education level (95% CI: 1.08-1.57, P = 0.006), 1.18 times higher for urban women completing less than secondary education (95% CI: 0.98-1.43, P = 0.09), and 0.66 times lower for rural women completing less than secondary education (95% CI: 0.52-0.84, P = 0.001). CONCLUSION: Vitamin D deficiency and insufficiency pose significant public health problems in Jordanian women. Prevalence of deficiency is significantly higher among urban women and among women who cover with a scarf/hijab or niqab.

Plasmonic nanofabrication by long-range excitation transfer via DNA nanowire.

Driven by the demand for ongoing integration and increased complexity of today's microelectronic circuits, smaller and smaller structures need to be fabricated with a high throughput. In contrast to serial nanofabrication techniques, based, e.g., on electron beam or scanning probe methods, optical methods allow a parallel approach and thus a high throughput. However, they rarely reach the desired resolution. One example is plasmon lithography, which is limited by the utilized plasmonic metal structures. Here we show a new approach extending plasmonic lithography with the potential for a highly parallel nanofabrication with a higher level of complexity based on nanoantenna effects combined with molecular nanowires. Thereby femtosecond laser pulse light is converted by Ag nanoparticles into a high plasmonic excitation guided along attached DNA structures. An underlying poly(methyl methacrylate) (PMMA) layer acting as an electron-sensitive resist is so structured along the former DNA position. This apparently DNA-guided effect leads to nanometer grooves reaching even micrometers away from the excited nanoparticle, representing a novel effect of long-range excitation transfer along DNA nanowires.

An application of multivariate ranks to assess effects from combining factors: metal exposures and semen analysis outcomes.

In studies of environmental effects on human health outcomes, it is often difficult to assess the effects of a group of exposure variables when the individual exposures do not appear to have statistically significant effects. To address this situation, we propose a method of U-scores applied to subsets of multivariate data. We illustrate the usefulness of this approach by applying it to data collected as part of a study on the effects of metal exposure on human semen parameters. In this analysis, profiles (pairs) of metals containing copper and/or manganese were negatively correlated with total motile sperm and profiles containing copper were negatively correlated with sperm morphology; profiles containing selenium and chromium were positively correlated with total motile sperm.

[The influence of nCPAP therapy on the autonomic nervous system dysfunction in OSA patients]. / Influenta terapiei nCPAP asupra sistemului nervos autonom la pacientii cu SAOS.

UNLABELLED: Obstructive sleep (OSA) can induce severe arrhythmias, including prolonged periods of asystole and heart block. Heart rate variability (HRV) has gained importance as a technique employed to explore the autonomic nervous system (ANS) which plays an important role in arrythmogenesis. AIMS: Our aim was to investigate nocturnal HRV by spectral analysis of RR intervals before and after continuous positive airway pressure (nCPAP) therapy. METHODS: To confirm the relation between OSA and ANS dysfunction, we prospectively investigated ANS function in 24 patients (18 males, mean age 53 years) with moderate or severe OSA. Overnight polysomnography was performed before and after nCPAP therapy. We analyzed apnea/hypopnea index (AHI), desaturation index, mean arterial oxygen saturation, mean and standard deviation (SD) for nocturnal HRV triangular index and pNN50 before and after initiating CPAP treatment. RESULTS: AHI decreased markedly from 51 to 3 events/h, desaturation index decreased from 45.9 to 3.62 events/h, and mean arterial oxygen saturation improved from 92.15% to 94.8%. Nocturnal HRV triangular index decreased from 18.3 to 12.85 as well as nocturnal pNN50 in all patients after initiating nCPAP therapy, suggesting that efficient nCPAP therapy may restore nocturnal autonomic defects, characteristic of severe and moderate OSA, as proven in previous studies. CONCLUSIONS: Abnormalities in cardiovascular variability may be implicated in the subsequent development of cardiovascular diseases in patients with OSA. These results suggest that impaired ANS function is present in patients with OSA and can be improved by successful nCPAP therapy.

Urinary incontinence in gynecological oncology patients.

The objective of this study was to investigate the prevalence and significance of urinary incontinence (UI) symptoms in gynecological oncology (GO) patients and to test the gynecologists' proficiency in eliciting these symptoms. A prospective survey using questionnaires was designed. Two faculty practice offices in the United States were chosen for the study. Forty GO patients and 40 general gynecology patients were selected from the most recent outpatient appointments of the two hospitals. We used the Urogenital Distress Inventory and the Incontinence Impact Questionnaire to elicit UI symptoms in GO patients and compared the results with their medical records. A control group, selected from a general gynecological practice, was included for comparison. The main outcome measures were to investigate the prevalence and detection rates of UI in GO patients. GO patients were significantly more likely to report UI symptoms on the questionnaire than their gynecologist was able to elicit during a consultation (P < 0.001). The survey found that 60% (24/40) of the GO patients reported at least one symptom of UI, with 23% complaining of "severe" symptoms. Of those patients who reported the symptoms on questionnaire, only 5% (2/40) were detected at the initial physician assessment (P < 0.01). Eighteen percent of the GO patients reported that the UI symptoms adversely affected their quality of life. The prevalence of symptoms was not associated with the primary cancer site. There was no difference in detection rates between the two practice settings. In a multivariate analysis, there was no factor that emerged as the best discriminator for a positive response to the questionnaire. A significant proportion of GO patients report severe UI symptoms that are not detected by gynecologic oncologists or gynecologists during routine consultations.

Endoscopic injection of mitomycin adsorbed on carbon particles for advanced esophageal cancer: a pilot study.

BACKGROUND AND STUDY AIMS: Patients with advanced, unresectable esophageal carcinoma have an extremely poor prognosis, with dysphagia being the major problem. The aim of this prospective pilot study was to evaluate the efficacy of local injections of mitomycin adsorbed onto activated carbon particles (MMC-CH) in advanced unresectable esophageal squamous-cell carcinoma. The primary outcome parameter was survival time; secondary parameters were dysphagia and quality of life. PATIENTS AND METHODS: Ten consecutive patients with stage IV esophageal carcinoma (age: median 58, range 32 - 78), median tumor length 11 cm (range 5 - 15) received four weekly injections of 15 mg (10 ml) MMC-CH into the endoscopically visualized tumor, via a 5-mm sclerotherapy needle. The tumor stage, symptom score, and quality of life (measured using the Karnofsky index) were assessed before and after therapy and every 2 months thereafter. RESULTS: The median survival time after MMC-CH therapy was 16 weeks (95 % CI, 11.7 to 20.4). Dysphagia was reduced ( P < 0.001) in parallel with the reduction in the tumor mass ( r = 0.82, P = 0.01). The Karnofsky index ( P < 0.01) also improved after MMC-CH treatment. MMC-CH was well tolerated, and no side effects were observed. CONCLUSIONS: Endoluminal MMC-CH therapy appears to be an effective, inexpensive, and well-tolerated treatment for unresectable advanced squamous-cell esophageal carcinoma.

Molecular cytogenetic analysis of a de novo balanced X;autosome translocation: Evidence for predominant inactivation of the derivative X chromosome in a girl with multiple malformations.

We report on the characterization of a de novo, apparently balanced translocation t(X;15)(p11.3;q26) detected in a girl with multiple congenital malformations. Replication banding studies on Epstein-Barr virus transformed peripheral blood lymphocytes revealed non-random X chromosome inactivation with predominant inactivation of the derivative X chromosome. Using chromosomal fluorescence in situ hybridization (FISH), we located the breakpoints to a 30 kb region on the short arm of the X chromosome band p11.3 and to a 160 kb region defined by BAC RP11-89K11 on the long arm of chromosome 15. Our data suggest that the disruption/disturbance of plant homeo domain (PHD) zinc finger gene KIAA0215 or of another gene (RGN, RNU12, P17.3, or RBM10) in the breakpoint region on the X chromosome is not well tolerated and leads to the selection of cells with an active non-rearranged X chromosome.

Bench/step training with and without extremity loading. Effects on muscular fitness, body composition profile, and psychological affect.

BACKGROUND: To study the effect of bench/step group exercise with and without extremity loading on muscular fitness, body composition, and psychological affect. EXPERIMENTAL DESIGN: a prospective training study. SETTING: general community fitness center. PARTICIPANTS: 44 healthy adult females (age: 21-51 yrs). INTERVENTIONS: 12 weeks of bench/ step exercise (3 sessions/week, 50 min/session, 60-90% HRmax). Subjects were randomly assigned to groups that trained with (WT, n=16) and without (NWT, n=16) 0.68 kg/ankle and 1.36 kg/hand weights while 12 subjects served as non-training controls (NTC). MEASURES: Pre- and postintervention muscular strength and endurance for knee and elbow flexion and extension, and for shoulder abduction and adduction were examined by isokinetic dynamometry. Body composition was assessed with hydrostatic weighing and psychological affect by questionnaire. RESULTS: Thirty-two subjects completed the study. ANOVA revealed that pre- to postintervention changes for body fat (2.6%), fat-free weight (+0.7 kg), fat weight (-1.9 kg), and knee flexion peak torque were significantly different in the bench/step exercise trained (WT+NWT) compared to the NTC study group. Specific comparisons of muscle strength and endurance change scores of WT+NWT relative to NTC, and of WT relative to NWT revealed no other significant differences between groups. Positive and negative affective states were similar among study groups before and after the intervention. CONCLUSIONS: Participation in bench/step group exercise improved body composition but was of limited or no value as a modality to change muscular fitness and psychological affect in healthy adult females. The use of ankle and hand weights failed to enhance training adaptations.

Effects of ginseng supplementation on supramaximal exercise performance and short-term recovery.

The purpose of this study was to examine the effects of long-term ginseng supplementation on short, supramaximal exercise performance and short-term recovery. Using a double-blind protocol, 24 healthy, active women were randomly assigned to a ginseng (n = 12) or placebo (n = 12) treatment group. Each participant added a standardized extract of Panax ginseng C.A. Meyer (400 mg per day of G115) or placebo to their normal diet for 8 weeks (56-60 days). Before and after the trial period, each subject performed an all-out-effort, 30-second leg cycle ergometry test (Wingate protocol) followed by a controlled recovery under constant laboratory conditions. Nineteen subjects completed the study. Analysis of variance using pretest to posttest change scores revealed no significant difference between the ginseng and placebo study groups for the following variables measured: peak anaerobic power output, mean anaerobic power output, rate of fatigue, and immediate postexercise recovery heart rates (p > 0.05). In conclusion, the present data indicate that prolonged supplementation with ginseng (P. ginseng C.A. Meyer) has no ergogenic benefits during and in the recovery from short, supramaximal exercise.

Clinical and molecular-cytogenetic studies in seven patients with ring chromosome 18.

We report the results of detailed clinical and molecular-cytogenetic studies in seven patients with ring chromosome 18. Classical cytogenetics and fluorescence in situ hybridization (FISH) analysis with the chromosome 18 painting probe identified five non-mosaic and two complex mosaic 46,XX,dup(18)(p11.2)/47,XX,dup(18)(p11.2),+r(18) and 46,XX,dup(18)(p11.32)/47,XX,dup(18)(p11.32),+r(18) cases. FISH analysis was performed for precise characterization of the chromosome 18 breakpoints using chromosome 18-specific short-arm paint, centromeric, subtelomeric, and a panel of fifteen Alu- and DOP-PCR YAC probes. The breakpoints were assessed with an average resolution of approximately 2.2 Mb. In all r(18) chromosomes, the 18q terminal deletions ranging from 18q21.2 to 18q22.3 ( approximately 35 and 9 Mb, respectively) were found, whereas only in four cases could the loss of 18p material be demonstrated. In two cases the dup(18) chromosomes were identified as inv dup(18)(qter-->p11.32::q21.3-->qter) and inv dup(18)(qter-->p11.32::p11.32-->p11.1: :q21.3-->qter)pat, with no evidence of an 18p deletion. A novel inter-intrachromatid mechanism of formation of duplications and ring chromosomes is proposed. Although the effect of "ring instability syndrome" cannot be excluded, the phenotypes of our patients with characteristic features of 18q- and 18p- syndromes are compared and correlated with the analyzed genotypes. It has been observed that a short neck with absence of cardiac anomalies may be related to the deletion of the 18p material from the r(18) chromosome.

Volatile compounds released by enzymatic hydrolysis of glycoconjugates of leaves and grape berries from Vitis vinifera Muscat of Alexandria and Shiraz cultivars.

Glycoconjugates from Muscat of Alexandria and Shiraz leaves and grape berries were isolated by adsorption on Amberlite XAD-2 resin, and enzymatically released aglycons were analyzed by GC-FID and GC-MS. About 120 aglycons were fully or tentatively identified. Compositional differences were observed between leaves and berries of the two varieties in five aglycon chemical groups: C6 alcohols, aliphatic alcohols, monoterpenes, shikimates, and C(13)-norisoprenoids, which were much more abundant in the leaves than in the berries. The differences observed for C(13)-norisoprenoids were in agreement with their hypothetical independent biosynthesis in leaves and berries. Thus, 3-hydroxy-beta-damascone, an important norisoprenoid aglycon of grape berries, was not detected in leaves, whereas its oxidized derivative, 3-oxo-alpha-damascone, was absent in berries. Compositional differences were also observed between Muscat and Shiraz leaves. 3-Oxo-alpha-ionol was not detected in Shiraz leaves, and its retro derivatives were less abundant than in Muscat of Alexandria leaves. Conversely, in Shiraz leaves the levels of 7,8-dihydroionone derivatives, such as megastigman-3,9-diol and 3-oxo-7,8-dihydro-alpha-ionol, were higher than in Muscat of Alexandria leaves.