“The curing behavior of the dicyanate ester of bisphenol-A


“The curing behavior of the dicyanate ester of bisphenol-A (DCBA) modified with poly(hydroxy ether of bisphenol-A) (phenoxy) is studied by differential scanning calorimetry in dynamic and isothermal tests at temperatures between 120 and 240 degrees

C. The addition of phenoxy to DCBA produces an increase in the reaction rate and a decrease in the temperature of maximum reaction rate for the uncatalyzed resin, and also for the system catalyzed with copper (II) acetyl acetonate/nonylphenol. The exothermic heat of curing for the mixtures is also dependent on the phenoxy content. These facts evidence a catalytic effect of phenoxy on the curing of the cyanate ester resin, even though an autocatalytic behavior is observed for all uncatalyzed DCBA/phenoxy mixtures. A simplified mechanistic

kinetic model is used to calculate the kinetic LDN-193189 chemical structure parameters. For the uncatalyzed systems, a decrease in the kinetic constant for the initiation reactions, and an increase in the propagation constant are measured when the cyanate content increases. The thermal activation energy for the initiation reaction of the catalyzed systems SN-38 chemical structure is lower than that of the uncatalyzed ones, and it depends on the weight fraction of cyanate in the mixture. (C) 2010 Wiley Periodicals, Inc. J Appl Polym Sci 118: 2869-2880, 2010″
“Smart gel periodontal drug delivery systems (SGPDDS) containing gellan gum (0.1-0.8% w/v), lutrol F127 (14, 16, and 18% w/v), and ornidazole (1% w/v) were CFTRinh-172 manufacturer designed for the treatment of periodontal diseases. Each formulation was characterized in terms of in vitro gelling capacity, viscosity, rheology, content uniformity, in vitro drug release, and syringeability. In vitro gelation time and the nature of the gel formed in simulated saliva for prepared formulations showed polymeric concentration dependency. Drug release data from all formulations was fitted to different kinetic models and the Korsemeyer-Peppas model was the best fit model. Drug release was significantly decreased as the concentration of each polymer component was increased. Increasing the concentration

of each polymeric component significantly increased viscosity, syringeability, and time for 50%, 70%, and 90% drug release. In conclusion, the formulations described offer a wide range of physical and drug release characteristics. The formulation containing 0.8% w/v of gellan gum and 16% w/v of lutrol F127 exhibited superior physical characteristics.”
“Insulin resistance is a major factor in the pathogenesis of type 2 diabetes and underpins the strong association between obesity and diabetes. Paradoxically, the metabolic consequences of having ‘too much’ fat (obesity) are remarkably similar to those of having ‘too little’ fat (lipodystrophy): a finding that has generated considerable interest in a rare disease.

The risk for anesthesiologist intervention increased 2 2-fold for

The risk for anesthesiologist intervention increased 2.2-fold for every 1 unit increase in the American Society of Anesthesiologists

Physical Status score (P = .007).

CONCLUSION: The monitoring of cataract surgery patients by registered nurses after anesthesiologist-supervised intravenous propofol sedation during injection anesthesia was associated with very low complication GSK2879552 and anesthesiologist intervention rates.”
“The aim of the present study was to estimate the genetic variability of the Gentile di Puglia sheep breed by using microsatellite markers, to provide information useful for conservation. The DNA of 82 animals, belonging to 6 different farms, was analyzed at 19 microsatellite loci. The number of alleles,

allele frequencies, deviations from Hardy-Weinberg proportions, linkage disequilibrium among loci, genetic similarity, genetic distances, and molecular coancestry-based parameters were calculated. Seventeen out of 19 microsatellites showed heterozygote deficiency in the whole population, although only 4 (OarAE129, ILSTS28, ILSTS5, MAF33) showed significant deviations from Hardy-Weinberg proportions (P < 0.01). The genetic similarity (an index of allele sharing among individuals) within the whole population was low (0.318), and the average PF-6463922 in vitro number of alleles per locus was quite high (9.68). The results obtained highlighted a population presenting both a deficiency of heterozygotes and great genetic variability. These results suggest that stratification of the breed in subpopulations, probably derived from different farm management in each herd, led to a population characterized by great genetic diversity among different herds and by great similarity within each herd. Moreover, in the past, Gentile di Puglia

sheep have undergone a strong numeric decline, involving genetic drift effects and considerable consanguinity within the breed.”
“In the present work we have reported the results of investigations on local structures of e-beam evaporated (Gd2O3-SiO2) composite thin films by synchrotron based EXAFS measurements. The evolution of local structure in the case of the Gd2O3-SiO2 system is found to be different from the HfO2-SiO2 system reported by us earlier. The EXAFS analysis has shown Selleckchem BTK inhibitor that the Gd-O bond length decreases monotonically as SiO2 content in the films increases. Also the amplitudes of the peaks in the FT-EXAFS spectra of the samples, which depend jointly on the coordination numbers as well as the Debye-Waller factors (measure of disorder) are found to decrease monotonically with increase in SiO2 contents in the Gd2O3 matrix. Atomic force microscopy (AFM) measurements of the samples also show continuous evolution of amorphous-like denser microstructure with increase in SiO2 content in the films.

Of 22 recurrent sites, recurrence was diagnosed by histological e

Of 22 recurrent sites, recurrence was diagnosed by histological examination in 9 (41%) sites and by imaging examination in 13 (59%) sites. FDG-PET/CT correctly diagnosed recurrence in 17 of the 18 (94%) patients

and 21 of the 22 (95%) recurrent sites. The sensitivity, specificity, positive predictive value, negative predictive value and accuracy were 94.4, 97.6, 89.5, 98.8 and 97.0%, respectively. On the other hand, in 3 patients, other diseases were detected and treated appropriately. Post-recurrence therapies were performed in all patients with recurrence, but 4 (22%) patients died of the original diseases. The median post-recurrence survival was 25.2 months, and the 1- and 2-year post-recurrence survival rates were 83.3 and 69.6%, respectively.

CONCLUSIONS: FDG-PET/CT is a useful tool that has high capability to detect selleck chemical recurrences in

asymptomatic NSCLC patients after a potentially curative operation. However, a large-scale multi-institutional randomized control trial may be needed to ascertain the benefit of surveillance with FDG-PET/CT.”
“The T-box transcription factor Tbx3 plays multiple roles in normal development and disease. In order to function in different tissues and on different target genes, Tbx3 binds transcription factors or other cofactors specific to temporal or spatial locations. Examining the development of the mammary gland, limbs, and heart as well as the biology of stem cells and cancer provides insights into the diverse and common functions that Tbx3 can perform. By

find more either repressing or activating transcription of target genes in a context-dependent manner, Tbx3 is able to modulate differentiation of immature progenitor cells, control the rate of cell proliferation, and mediate cellular signaling pathways. Because the direct regulators of these cellular processes are highly learn more context-dependent, it is essential that Tbx3 has the flexibility to regulate transcription of a large group of targets, but only become a active on a small cohort of them at any given time or place. Moreover, Tbx3 must be responsive to the variety of different upstream factors that are present in different tissues. Only by understanding the network of genes, proteins, and molecules with which Tbx3 interacts can we hope to understand the role that Tbx3 plays in normal development and how its aberrant expression can lead to disease. Because of its myriad functions in disparate developmental and disease contexts, Tbx3 is an ideal candidate for a systems-based approach to genetic function and interaction. WIREs Syst Biol Med 2012. doi: 10.1002/wsbm.1162″
“Background and objective: Although guidelines for asthma emphasize the importance of spirometry for continuity and evaluation of care, it is underused in general practice. The objective of this study was to investigate the effect of spirometry and medical review on asthma control in general practice over 12 months.

c

2009 American Institute of Physics [DOI: 10 1063/1 311

c

2009 American Institute of Physics. [DOI: 10.1063/1.3116531]“
“Objective To determine effects of long-distance GW4869 racing exercise on iron status in endurance racing sled dogs, with or without anemia.

Design-Prospective cohort study.

Animals-114 dogs that participated in the 2007 Iditarod Trail Sled Dog Race (59 and 55 dogs that did or did not complete the race, respectively).

Procedures-Stored serum samples obtained from 85 endurance-racing sled dogs that were expected to participate in the race were used to establish study reference intervals and prerace group values for iron-related variables. Blood samples collected from 114 study dogs before (ie, baseline) and after participation in the race were used to determine PCV and serum total protein concentrations before and after racing and assess iron-related variables Fosbretabulin concentration after racing.

Results-Mean values for PCV and serum total protein concentration were decreased after racing, compared with baseline values in the same dogs. Mean serum iron concentration was low, and mean serum ceruloplasmin and C-reactive protein (CRP) concentrations were high in dogs after racing, compared with prerace group values. Mean serum ferritin concentration was high in dogs that did not complete the race, compared with the prerace group value and that of dogs that finished the race; 4 of 113 (3.5%) study dogs had low ferritin concentrations

(<73 ng/mL) after racing, suggestive of possible iron deficiency.

Conclusions and Clinical Relevance-Decreased PCV and serum total protein concentrations were consistently detected, whereas iron deficiency appeared to be uncommon, in study dogs after race participation. High serum concentrations of ceruloplasmin and CRP after racing suggested that changes indicative of iron deficiency may be masked FDA approved Drug Library manufacturer by inflammation. Alternatively, changes in serum iron and CRP concentrations may reflect a physiologic response. (J Am Vet Med Assoc 2011;239:1201-1210)”
“ObjectiveTo investigate the difference in the presence of trigger points (TrPs) between patients

with chronic nonspecific low back pain (LBP) and healthy people, and to determine the relationship of TrPs with the intensity of ongoing pain, disability, and sleep quality.

DesignA cross-sectional study.

SettingThe role of TrPs in LBP has not been determined.

PatientsForty-two patients with nonspecific LBP (50% women), aged 23-55 years old, and 42 age- and sex-matched controls participated.

Outcome MeasuresTrPs were bilaterally explored within the quadratus lumborum, iliocostalis lumborum, psoas, piriformis, gluteus minimus, and gluteus medius muscles in a blinded design. TrPs were considered active if the subject recognized the local and referred pain as familiar symptoms, and TrPs were considered latent if the pain was not recognized as a familiar symptom.


“Cu-free Zr-based bulk metallic glasses (BMGs) with high g


“Cu-free Zr-based bulk metallic glasses (BMGs) with high glass-forming ability (GFA) have been discovered in the Zr-Ni-Al-Nb system. The GFA of Zr-Ni-Al alloys can be significantly enhanced by the minor addition of Nb, which increases the glass transition temperature, and lowers the melting and liquidus temperatures. The Zr-Ni-Al-Nb

BMGs have critical sample diameters of 15-20mm as SNS-032 nmr verified by a copper mold casting. They exhibit excellent corrosion resistance in chloride-ion-containing solutions, which is considerably better than that of other known Zr-based BMGs with superhigh GFA. It was revealed that the formation of highly protective Zr-, Al-, and Nb-enriched surface film is responsible click here for the high corrosion resistance. The BMGs also possess high compressive yield strength of 1786-1847 MPa,

large plastic strain of 1.6-3.2%, and a high Poisson’s ratio of 0.365-0.371. (C) 2011 American Institute of Physics. [doi:10.1063/1.3606642]“
“Cardiovascular disease results in more deaths globally than any other ailment. A major contributing factor to its pathology is atherosclerosis; an inflammatory disorder characterized by the development of fibrotic plaques within the arterial walls. Key to the progression of atherosclerosis are macrophages that contribute to plaque development by transforming into lipid-loaded foam cells upon internalization of modified lipoproteins. Accumulation of such foam cells in the arterial wall initiates the formation of fatty streaks that subsequently develop into advanced plaques that are prone to rupture. Clearly, macrophage lipid metabolism and foam cell biology represent a key avenue of research during the ongoing search for novel therapeutic targets that can be used in the clinical intervention of atherosclerosis. In this article, we aim to summarize the current status of research on macrophages, lipid metabolism and gene expression in relation to atherogenesis and both current GSK923295 Cytoskeletal Signaling inhibitor and potential future therapies.”
“Glucosinolates are amino acid-derived secondary metabolites with diverse biological activities dependent on chemical modifications

of the side chain. Five flavin-monooxygenases FMO(GS-OX1-5) have recently been identified as aliphatic glucosinolate side chain modification enzymes in Arabidopsis thaliana that catalyse the generation of methylsulphinylalkyl glucosinolates, which can be hydrolysed to products with distinctive benefits for human health and plant defence. Though the localization of most aliphatic glucosinolate biosynthetic enzymes has been determined, little is known about where the side chain modifications take place despite their importance. Hence, the spatial expression pattern of FMO(GS-OX1-5) genes in Arabidopsis was investigated by expressing green fluorescent protein (GFP) and beta-glucuronidase (GUS) fusion genes controlled by FMO(GS-OX1-5) promoters.

Results: The results from the STAP indicated that the auditory me

Results: The results from the STAP indicated that the auditory memory subsection of the STAP was the most affected followed by dichotic CV and speech-in-noise. Gap detection was the

least affected among the four subsections. A high and significant correlation was noted between the subsections of the STAP and the APD diagnostic tests. The sensitivity and specificity of the STAP on comparison with the diagnostic tests was found to be 76.6% and 72%, respectively. It was found that when a combination of SCAP and STAP was used for screening, the sensitivity and specificity were higher.

Conclusion: Based on the findings of the study, it is recommended that both SCAP and STAP be administered. Further, there was also a good test-retest reliability of the SCAP, STAP and the APD diagnostic tests. (C) 2013 Elsevier Ireland Ltd. All rights reserved.”
“Background: The role of the VX-809 molecular weight location and severity of the initial cartilage lesions associated with an ankle fracture in the development of posttraumatic osteoarthritis has not been established,

to our knowledge.

Methods: We performed a long-term follow-up study of a consecutive, prospectively included cohort of 288 ankle fractures that were treated operatively between June 1993 and November 1997. Arthroscopy had been performed in all cases in order to classify the extent and location of cartilage damage. One hundred and nine patients (47%) were available for follow-up after MAPK inhibitor a mean of 12.9 years. Cl-amidine cell line The main outcome parameters were the American Orthopaedic Foot and Ankle Society (AOFAS) hindfoot score for clinical evaluation and a modified Kannus osteoarthritis score for radiographic assessment of the development of posttraumatic osteoarthritis.

Results: Cartilage damage anywhere in the ankle joint was associated with a suboptimal clinical outcome (odds ratio, 5.0 [95% confidence interval = 1.3 to 20.1]; p = 0.02) and with a suboptimal radiographic outcome (odds ratio = 3.4 [95% confidence interval = 1.0 to 11.2]; p = 0.04). An association was also found between

the development of clinical signs of osteoarthritis and a deep lesion (>50% of the cartilage thickness) on the anterior aspect of the talus (odds ratio = 12.3 [95% confidence interval = 1.4 to 108.0]; p = 0.02) and a deep lesion on the lateral aspect of the talus (odds ratio = 5.4 [95% confidence interval = 1.2 to 23.5]; p = 0.02). A deep lesion on the medial malleolus was associated with the development of clinical signs of osteoarthritis (odds ratio = 5.2 [95% confidence interval = 1.9 to 14.6]; p < 0.01) and radiographic signs of osteoarthritis (odds ratio = 2.9 [95% confidence interval = 1.1 to 7.9]; p = 0.03) of osteoarthritis. There was no significant correlation between cartilage lesions on the fibula and the long-term outcome.

The tumors arising from it may be subjected to a different set of

The tumors arising from it may be subjected to a different set of forces which may predispose to growth in a tangential or horizontal direction.

A young woman who underwent myomectomy for a large isthmic myoma is presented and the growth dynamics are discussed.”
“There is a huge market for ergogenic supplements for athletes. However, only a few products have been proven to have ergogenic effects and to be effective at improving muscle strength and body composition. One such supplement is beta-hydroxy beta-methylbutyrate (HMB). Derived from the amino acid leucine and its keto acid alpha-ketoisocaproate (MC), HMB has been well documented as an oral ergogenic supplement commonly used by athletes. Several studies have shown that combining exercise training with HMB supplementation leads Anlotinib chemical structure to increased muscle mass and strength, and there is some anecdotal evidence of aerobic improvement. However, HMB supplementation has been found to be effective mainly for untrained individuals. While previous reviews have emphasized three main pathways for HMB’s mode of action: 1) enhancement of sarcolemmal integrity via cytosolic cholesterol, 2) inhibition of protein degradation via proteasomes, and 3) increased protein synthesis via the mTOR pathway, more recent studies

have suggested additional possible mechanisms for its physiological effects. These include decreased cell apoptosis and enhanced cell survival, increased proliferation, differentiation and fusion via the MAPK/ERK and PI3K/Akt pathways, and enhanced IGF-I transcription. selleck screening library These are described here, and hormonal interactions are discussed, along with HMB dosage and safety issues.”
“Background: The U.S. Food and Drug Administration has requested post-market surveillance data, including data on metal ion levels, regarding metal-on-metal total hip arthroplasty. We performed a prospective, randomized study of metal ion levels in erythrocytes, serum, and whole blood at five years after

28 and 36-mm metal-on-metal and 28-mm metal-on-polyethylene total hip arthroplasty.

Methods: One hundred and five enrolled patients were randomized equally to the three bearing surface options and were blinded with regard to their treatment group. Metal ion measurements and clinical GF120918 Transmembrane Transporters inhibitor evaluations were performed at regular. intervals.

Results: Cobalt and chromium ion levels in all blood sample types at the five-year time point were significantly lower in the metal-on-polyethylene group than in each of the two metal-on-metal groups (p < 0.001) with the exception of chromium in erythrocytes (p = 0.194). Cobalt in serum (p = 0.029) and erythrocytes (p = 0.002) showed significant increases from two to five years in the 36-mm metal-on-metal group; similar increases were not seen in the 28-mm metal-on-metal group. At five years, five patients in the 36-mm metal-on-metal group and none in the 28-mm metal-on-metal group had cobalt or chromium levels of >7 ppb.


“A major goal of evolutionary biology is to identify the c


“A major goal of evolutionary biology is to identify the causes of diversification and to ascertain why some evolutionary lineages are especially diverse. Evolutionary biologists have long speculated that polyphenism-where a single genome produces alternative phenotypes in response to different environmental stimuli-facilitates speciation, especially when these alternative phenotypes Staurosporine order differ in resource or habitat use, i.e. resource polyphenism. Here, we present a series of replicated sister-group comparisons showing that fishes and amphibian clades in which resource

polyphenism has evolved are more species rich, and have broader geographical ranges, than closely related clades lacking resource polyphenism. Resource polyphenism may promote diversification by facilitating each of the different stages of the speciation process (isolation, divergence, reproductive isolation) and/or

by reducing a lineage’s risk of extinction. Generally, resource polyphenism may play a key role in fostering diversity, and species in which resource polyphenism has evolved may be predisposed to diversify.”
“In weakly absorbing materials such as polymers and soft tissue, x-ray phase sensitive imaging methods can provide substantially enhanced contrast compared to classical, absorption based radiography. For specific applications, the latter can be applied in a dual energy scheme that helps to identify, discriminate and/or quantify materials. In this paper, we report on a new method that combines the idea of dual energy with x-ray VX-809 phase contrast imaging and thus provides P5091 cell line material sensitivity among poor absorbers. The dual energy modality cannot be applied in common phase contrast imaging

schemes because of their demand for limited bandwidth or even monochromatic x-ray sources. Our new interferometric method based on diffraction gratings can overcome this shortcoming and thus simultaneously deliver x-ray phase contrast images for two distinct x-ray energy intervals. It has been shown that high quality images can be obtained with the dual energy phase setup. Energy spectra with 40 kV and 70 kV were applied to obtain low- and high-energy images, respectively. Furthermore, an estimation of the effective energy in the image formation process for absorption and phase contrast was experimentally determined. Examples are shown for which the dual energy phase contrast modality delivers complementary information on material composition when compared with the conventional dual energy scheme. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3512871]“
“Urological complications contribute to morbidity and graft loss after kidney transplantation. Aim of this study was to assess the role of revisional surgery on patient outcome. From 1997 to 2007, 887 patients underwent kidney transplantation in our institution. Clinical data of patients with urological complications were analyzed. Ureteral complications were observed in 50 of 887 (5.

Complications were one wound infection and fistula recurrence in

Complications were one wound infection and fistula recurrence in five (26%) patients in the conservative group and two (20%) in the surgical group. Hospital stay was exceedingly prolonged in both groups with a median of 21 and 11 versus 6 days in patients with regular postoperative course following

thyroid surgery.

Conclusions Data of this series support definition of the two categories of high- and low-output fistulas according to drainage collection with >300 versus <200 ml/day. Fasting in low-output fistula facilitates conservative treatment Stattic with closed drainage, whereas in high-output fistulas surgical intervention should be sought. Attendant criteria for treatment stratification are equally important, like patient’s compliance, nutritional, and general health status as well as evidence for wound infection. Surgical closure of lymph fistula may be demanding when identification of the

secreting fistula is limited and even muscle flap fortification may fail. Ultimately, in unsuccessfully reoperated fistula recurrences, open drainage may become necessary. Lymph fistulas cause significantly prolonged hospital stay, possible critical clinical decay, and unfavorable cosmetic and see more oncologic outcome while the superior management remains to be defined.”
“We describe a nonparametric framework for incorporating information from co-registered anatomical images into positron emission tomographic (PET) image reconstruction through priors based on information theoretic similarity measures. We compare and evaluate the use of mutual information (MI) and joint entropy (JE) between feature vectors extracted from the anatomical and PET images as priors in PET reconstruction. Scale-space theory provides a framework for the analysis of images at different levels of detail, and we use this approach to define feature vectors that emphasize prominent boundaries in the anatomical and functional images, and attach less importance to detail and noise that

is less likely to be click here correlated in the two images. Through simulations that model the best case scenario of perfect agreement between the anatomical and functional images, and a more realistic situation with a real magnetic resonance image and a PET phantom that has partial volumes and a smooth variation of intensities, we evaluate the performance of MI and JE based priors in comparison to a Gaussian quadratic prior, which does not use any anatomical information. We also apply this method to clinical brain scan data using F(18) Fallypride, a tracer that binds to dopamine receptors and therefore localizes mainly in the striatum. We present an efficient method of computing these priors and their derivatives based on fast Fourier transforms that reduce the complexity of their convolution-like expressions.

Closed-form transcendental equations have been derived for the fr

Closed-form transcendental equations have been derived for the frequency shift due to the added mass. Using the energy principles, generalized nondimensional calibration constants have been derived for an explicit relationship between the added mass and the frequency shift. A molecular mechanics model based this website on the universal force field potential is used to validate the new results presented. The results indicate that the distributed nature of the mass to be detected

has considerable effect on the performance of the sensor. (C) 2010 American Institute of Physics. [doi:10.1063/1.3435316]“
“Quantitative analysis of geometry and surface growth based on the sequential replica method is used

to compare morphogenesis at the shoot apex of Anagallis arvensis in the reproductive and vegetative phases of development. Formation of three types of lateral organs takes place at the Anagallis shoot apical meristem (SAM): vegetative leaf primordia are formed during the vegetative phase and leaf-like bracts and flower primordia during the reproductive phase. Although the shapes of all the three types of primordia are very similar during their early developmental stages, areal growth rates and Fedratinib anisotropy of apex surface growth accompanying formation of leaf or bract primordia are profoundly different from those during formation of flower primordia. This provides

an example of different modes of de novo formation of a given shape. Moreover, growth accompanying the formation of the boundary between the SAM and flower primordium is entirely different from growth at the adaxial leaf or bract primordium boundary. In the latter, areal growth rates at the future boundary are the lowest of all the apex surface, while in the former they are relatively very high. The direction of maximal growth rate is latitudinal (along the future boundary) in the case of leaf or bract primordium but meridional check details (across the boundary) in the case of flower. The replica method does not enable direct analysis of growth in the direction perpendicular to the apex surface (anticlinal direction). Nevertheless, the reconstructed surfaces of consecutive replicas taken from an individual apex allow general directions of SAM surface bulging accompanying primordium formation to be recognized. Precise alignment of consecutive reconstructions shows that the direction of initial bulging during the leaf or bract formation is nearly parallel to the shoot axis (upward bulging), while in the case of flower it is perpendicular to the axis (lateral bulging). In future, such 3D reconstructions can be used to assess displacement velocity fields so that growth in the anticlinal direction can be assessed.