Our analyses provide evidence, however, that the mechanism underl

Our analyses provide evidence, however, that the mechanism underlying these aberrations is not Y chromosome nondisjunction. On the basis of our findings, we postulate that a mutation at or near the centromere affects

both the segregation and sex-determining properties of the A/HeJ Y chromosome. This Y chromosome adds to the growing list of Y chromosome aberrations in humans and mice. In both species, the centromere of the Y is structurally C188-9 chemical structure and morphologically distinct from the centromeres of all other chromosomes. We conclude that these centromeric features make the human and mouse Y chromosomes extremely sensitive to minor structural alterations, and that our studies provide yet another example of a good Y chromosome gone ‘bad.’”
“Purpose\n\nWe aimed to identify the maximum-tolerated dose (MTD) of irinotecan in patients with cancer with UGT1A1*1/*1 and *1/*28 genotypes. We hypothesize that the patients without the *28/*28 genotype tolerate higher doses of irinotecan.\n\nPatients and Methods\n\nPatients undergoing first-line treatment for metastatic colorectal cancer (CRC) eligible for treatment with irinotecan plus infusional fluorouracil/leucovorin (FOLFIRI) were screened for the UGT1A1*28/*28 this website genotype and excluded from the study. Fifty-nine white patients with either the *1/*1 or the *1/*28 genotype were eligible for dose escalation of irinotecan.

The starting dose of biweekly irinotecan was 215 mg/m(2) for both genotype groups, whereas the dose of infusional fluorouracil was fixed. Pharmacokinetic data of irinotecan and metabolites were also obtained.\n\nResults\n\nThe dose of irinotecan was escalated to 370 mg/m(2) Geneticin research buy in patients with the *1/*28 genotype and to 420 mg/m(2) in those with the *1/*1 genotype. Dose-limiting toxicities (DLTs) were observed in two of four of *1/*28

patients at 370 mg/m(2) and in two of three of *1/*1 patients at 420 mg/m(2). No DLTs were observed in 10 *1/*28 patients at 310 mg/m(2) and in 10 *1/*1 patients at 370 mg/m(2); hence these dose levels were the MTD for each genotype group. The most common grade 3 to 4 toxicities were neutropenia and diarrhea. The pharmacokinetics of irinotecan and SN-38 exhibit linear kinetics.\n\nConclusion\n\nThe recommended dose of 180 mg/m(2) for irinotecan in FOLFIRI is considerably lower than the dose that can be tolerated when patients with the UGT1A1*28/*28 genotype are excluded. Prospective genotype-driven studies should test the efficacy of higher irinotecan doses in the FOLFIRI schedule. J Clin Oncol 28: 866-871. (C) 2009 by American Society of Clinical Oncology”
“Glial cells, including astrocytes and macrophages/microglia, are thought to modulate pathological states following spinal cord injury (SCI). In the present study, we evaluated the therapeutic effects of interferon-gamma (IFN-gamma), which is one of the cytokines regulating glial function, in a mouse contusive SCI model.

Real-time PCR was performed to detect

Real-time PCR was performed to detect Emricasan the expression and promoter methylation status of PTEN and MGMT genes. The expression of CSCs markers was found in all GBM cases, and a statistically significant correlation was found among them after co-culture studies. The most pronounced affinity of DCs to GBM cells

was observed at dilutions between 1/4 and 1/256 in co-cultures. There was a statistically significant correlation between cellularity and granularity ratios for CD123 and CD11c. PTEN and MGMT gene expression and methylation values were evaluated with respect to CSCs expression and no statistical significance was found. Activation of DCs might associate with CSCs and the mononuclear cells cocktail including CD34, CD45, and CD56 cells which were obtained from allogenic UCB.”
“Although Blebbistatin price semen cryopreservation is widely and commonly used in the bovine breeding industry, half the spermatozoa do not survive and most of those that do survive undergo numerous physiological changes that affect their fertilising ability. The aim of the present study was to determine how cryopreservation affects the intracellular events involved in sperm capacitation

and acrosome reaction. Immediately after thawing and washing, almost 50% of spermatozoa were capacitated and more than 20% had lost their acrosome. The spermcAMP concentration was lower than that in freshly ejaculated spermatozoa, but the cytosolic pH (pH(cyt)) was in the expected range. The free cytosolic Ca(2+) concentration ([Ca(2+)](cyt)) was higher than in fresh spermatozoa and cryopreserved spermatozoa had internally stored Ca(2+). Phenylarsine oxide increased pH(cyt) and both cytosolic and stored Ca(2+) concentrations, whereas orthovanadate enhanced acrosome loss and protein tyrosine phosphorylation (P-Tyr). Heparin increased the percentage of spermatozoa expressing the B (capacitated) chlortetracycline binding pattern, pH(cyt), P-Tyr and Ca(2+) storage. Moreover, positive correlations

exist between capacitation, cAMP, P-Tyr and stored Ca(2+), whereas the acrosome reaction is positively correlated with pH(cyt) and [Ca(2+)](cyt). These results demonstrate that sperm regulatory mechanisms may be affected by the cryopreservation procedure, PND-1186 purchase but frozen-thawed sperm can still regulate their capacitation and acrosome reaction signalling pathways.”
“Objectives: The purpose of this study was to: (1) assess the effectiveness of galantamine in the prevention of cognitive impairments during ECT treatment and (2) to explore the safety and tolerability of galantamine during ECT treatment.\n\nMethods: Nine consecutive ECT patients were given galantamine 4 mg bid throughout the course of their ECT treatments followed by a second cohort of eight consecutive ECT patients who did not receive galantamine.


“The study aimed at examining a relationship between expre


“The study aimed at examining a relationship between expression of Ki-67 antigen and minichromosome maintenance 2 protein (MCM-2) and a grade of histological malignancy G in ductal breast cancers. The function of widely used marker of proliferation Ki-67 is still not clear. In contrast, the MCM-2 protein is well known to play an important role in controlling the cell cycle. Both proteins represent small protein molecules, which manifest nuclear expression only during cell division of normal DNA-PK inhibitor and neoplastic cells. Their expression is noted in several malignant tumours. These studies were conducted on 56 archival paraffin blocks of ductal breast cancers.

Immunohistochemical reactions were performed using monoclonal Ki-67- and MCM-2-specific antibodies. Statistical analysis demonstrated a positive correlation between expressions of two proteins (r=0.6; p<0.05). The most intense expression of these two markers was demonstrated in G3 grade cancers. Statistical analysis showed more pronounced expression of Ki-67 antigen in G3 grade cancers as compared to cancers of G1 and G2 grades (p<0.001) and, in the case of MCM-2 protein, a more pronounced expression in G3 grade cancers, as compared to those of G1 (p<0.05) or G2 grade (p<0.01). The results obtained in our study suggest that MCM-2 could be used as a marker of proliferation in breast carcinomas.”
“A

constitutive modeling is proposed to describe the elastoplastic behavior Compound C datasheet of materials. The model response for uniaxial loading of as-received and pre-strained materials is investigated. The most important characteristic of the model for as-received material is the consideration of a von Mises yield criterion that is valid from onset of loading. The same concept as the one for as-received material is followed to deal with the elastoplastic behavior of pre-strained material. However, a proportionality concept is

also introduced in this case to calculate the plastic deformation. After the implementation of the model in ABAQUS procedure by creation of an appropriate AZD5363 solubility dmso user material subroutine, the results of finite element analysis are studied and validated by some experimental results obtained from uniaxial test.”
“A 16-year-old boy presented with a 6-day history of fevers and myalgias and a 4-day history of diffuse crampy abdominal pain. On admission, his sclerae were icteric and he had diffuse abdominal tenderness. Erythrocyte sedimentation rate was elevated to 40; the gamma-glutamyl transferase level was elevated to 168 U/L; indirect bilirubin was 5.6 mg/dL; and direct bilirubin was 3.3 mg/dL. During the next 2 days, he developed many stigmata of Kawasaki disease (KD), including conjunctivitis, desquamating rash, mucosal changes, swelling of the hands and feet, and lymphadenopathy.

It is also associated with a positive attitude change, congruent

It is also associated with a positive attitude change, congruent with learning about the relevance of patient-doctor relationship within a cross-cultural setting.”
“Purpose: To develop a practical method to localize bones in magnetic resonance (MR) images, to create “computed tomographye-like” MR images (ctMRI) that could be used for radiation therapy verification, and to generate MR-based digitally reconstructed radiographs (DRR). Methods and

Materials: Using T1-weighted MR images, an air mask was derived from the manual contouring of all airways within the head and neck region this website using axial images at 6 anatomic levels. Compact bone, spongy bone, and soft tissue masks were then automatically generated using the statistical data derived from MR intensities and the air mask. ctMRI were then generated by mapping the MR intensities of the voxels within these masks into the

CT number ranges of corresponding tissues. MR-based DRRs created from ctMRI were quantitatively evaluated using the co-registered MR and CT head images of 20 stereotactic ARS-1620 cell line radiosurgery patients. Ten anatomical points, positioned on the skull segmented using a threshold of 300 HU, in CT and ctMRI, were used to determine the differences in distance between MR-based DRRs and CT-based DRRs, and to evaluate the geometric accuracy of ctMRI and MR-based DRRs. Results: The bony structures were identified on ctMRI and were visible in the MR-based DRRs. From the 20 patient cases, the mean geometric difference and standard deviation between the 10 anatomical points on MR-based and CT-based DRRs was -0.05 +/- 0.85 mm, respectively. This included uncertainty in image fusion. The maximum distance difference was 1.88 mm. Conclusions: A practical method was developed to segment bone click here from MR images. The ctMRI created can be used for radiation treatment verification

when MR-only simulation is performed. MR-based DRRs can be used in place of CT-based DRRs. (c) 2014 Elsevier inc.”
“The biological and social transmission of attitudes toward abortion and gay rights are analyzed in a large sample of adult twins, siblings, and their parents. We present a linear model for family resemblance allowing for both genetic and cultural transmission of attitudes from parents to offspring, as well as phenotypic assortative mating (the tendency to marry like) and other environmental sources of twin and sibling resemblance that do not depend on the attitudes of their parents. The model gives a close fit to the patterns of similarity between relatives for the two items. Results are consistent with a substantial role of genetic liability in the transmission of both attitudes. Contrary to the dominant paradigm of the social and political sciences, the kinship data are consistent with a relatively minor non-genetic impact of parental attitudes on the development of adult attitudes in their children.

These networks involve the medial prefrontal cortex (MPFC) and cl

These networks involve the medial prefrontal cortex (MPFC) and closely related areas in the medial and caudolateral orbital

cortex (medial prefrontal network), amygdala, hippocampus, and ventromedial parts of the basal ganglia, where alterations in grey matter volume and neurophysiological activity are found in cases with recurrent depressive episodes. Such findings hold major implications for models of the neurocircuits that underlie depression. In particular evidence from lesion analysis studies suggests that the MPFC and related limbic and striato-pallido-thalamic structures organize emotional expression. The MPFC is part of a larger “default system” of cortical areas that include the dorsal click here PFC, mid- and posterior cingulate cortex, anterior temporal cortex, and entorhinal and parahippocampal cortex, which has been implicated in self-referential functions. Dysfunction within and between structures in this circuit may induce disturbances in emotional behavior and other cognitive aspects of depressive syndromes in humans. Further, because the MPFC and related limbic structures provide forebrain modulation over visceral control structures in the hypothalamus and brainstem, their dysfunction can account for the

disturbances in autonomic regulation and neuroendocrine responses that are associated with mood disorders. This Sapitinib paper discusses these systems together with the neurochemical systems YAP-TEAD Inhibitor 1 datasheet that impinge on them and form the basis for most pharmacological therapies.”
“Spherical

agglomerates of pioglitazone hydrochloride were prepared by the emulsion solvent diffusion method with additives (polyethylene glycol 6000, polyvinyl pyrrolidone, p cyclodextrin, eudragit RS100, low acyl gellan gum and xanthan gum) using methanol, chloroform and water as a good solvent, bridging liquid and poor solvent respectively. Prepared agglomerates were evaluated for compressibility, solubility, dissolution rate and bioavailability, and characterized by SEM, XRPD, DSC and FTIR spectroscopy. Particle size, flowability, compactibility, packability, solubility, dissolution rate and bioavailability of plain agglomerates and agglomerates with additives (except with polyvinyl pyrrolidone) were advantageously improved compared with raw crystalline pioglitazone hydrochloride. These improved properties for direct compression were due to their large-spherical shape and enhanced fragmentation during compaction, together with increased tensile strength and reduced elastic recovery of the compacts. XRPD and DSC studies indicated polymorphic transition of pioglitazone hydrochloride from form II to I during recrystallization but this was not associated with any chemical transition, as indicated by FTIR spectra, well supported by stability studies.

Conclusions: These studies validate the clinical usefulness o

\n\nConclusions: These studies validate the clinical usefulness of genomic signatures as potential biomarkers and highlight ADORA2B and GALNT13 as potential candidate genes in SCD-associated elevated TRV.”
“The sodium-phosphate cotransporter 2a (NPT2a) is the principal phosphate transporter expressed in the brush border of renal proximal tubules and is downregulated by parathyroid

hormone (PTH) through an endocytic mechanism. Apical membrane expression of NPT2a is dependent on interactions with the sodium-hydrogen exchanger regulatory factor 1 (NHERF-1). An LLC-PK1 renal cell line stably expressing the PTH receptor (PTH1R) and NHERF-1, termed B28-N1, fails to functionally express NPT2a. In B28-N1 cells, NHERF-1 and NPT2a are inappropriately BMN 673 molecular weight localized to the cytoplasm. Ezrin, in the activated state, is capable at linking NHERF-1-assembled complexes to the actin cytoskeleton. Early-passage LLC-PK1 cells stably transfected with either empty vector

or wild-type ezrin express a comparable level of the active, T567 phosphorylated form of ezrin and are capable of functionally expressing NPT2a. Colocalization of the PTH1R, NPT2a, and ezrin exists and is prominently associated with actin-containing microvilli in apical domains of these cells. Upon PTH treatment, the PTH1R, NPT2a, NHERF-1, and ezrin colocalize to endocytic Navitoclax cell line vesicles and NPT2a-dependent phosphate uptake is markedly inhibited. LLC-PK1 cells expressing the constitutively active ezrin (T567D) display enhanced

NPT2a functional expression and PTH-mediated regulation of phosphate. Expression of a dominant-negative ezrin, consisting of the NH(2)-terminal half of the protein, markedly disrupts NPT2a-dependent phosphate uptake. PTH does not appear to alter ezrin phosphorylation at T567. Instead, PTH perhaps initiates NPT2a endocytosis by inducing reorganization of the actin-containing microvilli in a process that is blocked by the actin-stabilizing compound jasplakinolide.”
“Background/Aims: The aim of this study is to highlight the variable clincoradiological spectrum of isolated cortical vein thrombosis (ICoVT), which seems to remain a challenge to clinicians. HM781-36B Cases Reports: We reported 3 patients with this diagnosis. One presented with only an epileptic seizure, one with worsening headache, seizures, mental disorder, speech disturbance and right-sided weakness, and the other with seizures and fluctuating paralysis in her left-sided limbs. Brain images were manifested with a strand-like abnormal signal, a large hemorrhagic infarction and a continuously enlarged space-occupying massive edema, respectively. Conclusions: Neurologic features and brain imaging of ICoVT are highly variable, which might be partly responsible for the underestimation of ICoVT. Clinical diagnosis should probably be evoked more often. Copyright (C) 2013 S.

M mycoides subsp mycoides SC strain PG1 released large amounts

M. mycoides subsp. mycoides SC strain PG1 released large amounts of H2O2 but was only slightly cytotoxic. PG1 was found to have a reduced capacity to bind to ECaNEp cells and was unable to translocate H2O2 into the bovine cells, in contrast to virulent strains that release large amounts of H2O2. Thus, an efficient translocation of H2O2 into host cells is a prerequisite for the cytotoxic effect and requires an intact adhesion mechanism to ensure a close contact between mycoplasmas and host cells.”
“Background T-helper (Th)1/Th2 cytokine balance plays an important role in the pathogenesis of myocarditis. Recently, some studies indicate that interleukin (IL)-17,

known as a T cell (Th17)-derived BEZ235 proinflammatory cytokine, is the major mediator of tissue inflammation in inflammatory and autoimmune diseases. Experimental autoimmune myocarditis (EAM) is a T cell-mediated autoimmune disease; however, the pathogenic role of IL-17 in the development of rat EAM remains largely unknown.\n\nMethods and Results In the present study, alterations of IL-17-related protein expressions were investigated and then the effect of hydrodynamic-based delivery of plasmid DNA encoding the IL-10-Ig gene on rat EAM and the effect of IL-10-Ig on IL-17 click here was evaluated. The results showed that IL-17 was expressed more highly than IFN-gamma expressed by Th1 cells in a T cells and the peaks of IL-17 related protein

expression in the heart were the early phase of EAM. Moreover, we observed that IL-10-Ig gene therapy was effective in controlling EAM and that IL-10-Ig significantly suppressed the expression of IL-17 as well as other proinflammatory cytokines, IL-1 beta

and TNF-alpha, in IL-1-stimulated splenocytes cultured from EAM rats.\n\nConclusions IL-17 is highly produced by alpha beta T cells in the early phase of EAM hearts and IL-17 inhibition might be a possible mechanism MK-0518 purchase of the amelioration of EAM by IL-10-Ig treatment. These data suggest that IL-17 produced by Th17 plays an important role in the pathogenesis of rat EAM.”
“Enhanced apoptosis of the cytotrophoblast in early pregnancy is associated with a high risk of preeclampsia. We and others have previously reported that the transcriptional factor, activator protein AP-2 alpha, suppressed trophoblast migration and invasion. However, it is not clear whether AP-2 alpha affects apoptosis in trophoblast cells and whether it regulates expression of apoptosis-related factors Bcl-2 and Bax. We analyzed the expression of AP-2 alpha, Bcl-2 and Bax in placental tissues in severe preeclamptic pregnancies and normotensive pregnancies using immunohistochemistry and real time-PCR. Further, apoptosis was assessed by flow cytometric analysis in the human trophoblastic cell line, BeWo cells, in which AP-2 alpha expression was transiently overexpressed or down-regulated by siRNA.

North American tertiary centers are more likely to see patients w

North American tertiary centers are more likely to see patients with CMT. Immune neuropathies and cryptogenic neuropathies Aurora Kinase inhibitor were seen equally in North America and South America.”
“So far, in the motor control research field has been found that different muscle premovement activation, the so-called motor set, could influence reaction time. Contradictive RT results were published and studies were not focused primarily on the motor set as an RT correlate. The purpose of the present study was to reveal whether different muscle preactivation modes

of the primary movers and their antagonists cause an influence on RT. After a GO-signal, either an index finger isometric abduction or adduction, was performed on the background of

different premovement muscle activation modes. One way ANOVA showed significant influence of the premovement condition when isometric abduction was the response to the GO-signal. RT was always shorten when the first dorsal interosseous was preactivated with respect to the other conditions. The results support the hypothesis that preactivation of primary movers could shorten the reaction time.”
“Titanium oxide (TiO2) thin films were prepared by ion-assisted deposition (IAD) on glass substrates at various substrate temperatures. These films were re-baked and at the temperature of re-crystallization. SR-2156 The effects of the stability of the films on their optical properties, residual stress and surface roughness were studied. The

evolution of oxidation and the cause of the variation in the optical properties and residual stress during baking and re-baking were discussed. However, the optical constants, residual stress and surface roughness varied less in re-baking than in baking. During both baking and re-baking, at substrate temperatures of 150 degrees C, the extinction coefficients, residual stress and surface roughness fluctuated more than at substrate temperatures of 200 and 250 degrees C. These results all reveal that TiO2 films were more stable after re-baking than after baking, and it was especially useful for the IAD films deposited at substrate temperature of 150 degrees C. (C) 2010 The Japan Society of Applied Physics”
“Indian and Chinese carps, Labeo rohita, Catla catla; Ctenopharyngodon idella; Hypophthalmichthys selleck screening library molitrix and Aristichthys nobilis were obtained from Punjab University Fish Research farms Lahore. These fishes were examined for parasitic infection, lernaeasis. Lernaea cyprinacea (L.) was the most prevalent parasite infecting these five fish species (comprising 88.48-100% population). In addition to L. cyprinacea; Lernaea polymorpha (Yu, 1938); Lernaea oryzophila (Monod, 1932) were found on L. rohita and C. idella. Lernaea ctenopharyngodonis was found on C. idella only. Prevalence of Lernaea was 68.9% and 63.6% in L. rohita and C. catla respectively and 78.1% in C. idella; 66.7% in A. nobilis and 9.1% in H. molitrix. Mean intensity was 17.3; 9.2; 6.91; 1.

4 of 12 soil samples in the other 5 quarters analyzed that harbor

4 of 12 soil samples in the other 5 quarters analyzed that harbored infective forms of the intestinal pathogens. The pathogens isolated, identified, and enumerated in the

soil samples were Ascaris lumbricoides, Ancylostoma duodenale, Taenia spp., Trichuiris trichiura, Entamoeba spp., Enterobius vermicularis, and Hymenolepis nana. Analysis of fecal samples in children below 5 years of age revealed the presence of Ascaris lumbricoides, Entamoeba hartmani, Taenia selleck screening library spp., Giardia lamblia, Cryptosporidium spp., Trichomonas sp., and Tricocephalus.”
“Most studies that follow subjects over time are challenged by having some subjects who dropout. Double sampling is a design that selects and devotes resources to intensively pursue and find a subset of these dropouts, then uses data obtained from Bafilomycin A1 supplier these to adjust naive estimates, which are potentially biased by the dropout. Existing methods to estimate survival from double sampling assume a random sample. In limited-resource settings, however, generating accurate estimates using a minimum of resources is important. We propose using double-sampling designs

that oversample certain profiles of dropouts as more efficient alternatives to random designs. First, we develop a framework to estimate the survival function under these profile double-sampling designs. We then derive the precision of these designs as a function of the rule for selecting different profiles, in order to identify more efficient designs. We illustrate using data from the United States President’s Emergency Plan for AIDS Relief-funded HIV care and treatment program in western Kenya. Our results show why and how more efficient designs should oversample patients with shorter dropout times.

Further, our work suggests generalizable practice for more efficient double-sampling designs, which can help maximize efficiency in resource-limited settings. Copyright (c) 2014 John Wiley & Sons, Ltd.”
“Deep buy VX-680 Vein Thrombosis (DVT) is a life threatening condition and a serious concern among hospitalised patients, with death occurring in approximately 6% of cases. Intermittent pneumatic compression (IPC) is commonly used for DVT prevention, however suffers from low compliance and issues of usability and portability. Neuromuscular electrical stimulation (NMES) has been shown to improve lower limb hemodynamics but direct comparison with IPC in terms of hemodynamics is rare but very important to determine the potential effectiveness of NMES in DVT prevention. Lower limb IPC was compared to calf NMES, in 30 healthy volunteers (18-23 years). Each intervention was carried out on each leg, on the popliteal vein measured using Doppler ultrasound. All interventions produced significantly greater haemodynamic responses compared to baseline. Calf-IPC and NMES produced significant increases in venous blood velocity (cm/s) and volume of blood ejected per cycle (1 cycle of NMES expels 23.22 ml compared to the baseline ejected volume of 2.

Methods and results: Folic acid supplementation was assessed

\n\nMethods and results: Folic acid supplementation was assessed by questionnaire. Mean pulsatility index (PI) and resistance index (RI) of the uterine (UtA) and umbilical arteries (UmA) were measured by Doppler ultrasound in mid-and late pregnancy. Systolic and diastolic blood pressures (SBP, DBP) were measured in early, mid-and late pregnancy. Compared to women who did not use folic acid, preconception folic acid users had a slightly lower UtA-RI in mid-pregnancy

[beta -0.02, 95% confidence interval (CI) -0.03, -0.01] and late pregnancy [beta -0.02, 95% CI -0.03, -0.001], a lower UtA-PI PFTα inhibitor in mid-pregnancy [beta -0.06, 95% CI -0.1, -0.03] and late pregnancy [beta -0.03, 95% CI -0.05, -0.01], as well as tendencies towards a lower UmA-PI in mid-pregnancy [beta -0.02, 95% CI -0.04, -0.001] and late pregnancy [beta -0.01, 95% CI -0.02, 0.01]. Additionally, these women had slightly higher SBP and Selleckchem Selisistat DBP throughout pregnancy. Neither the patterns of blood-pressure change during pregnancy,

nor the risk of gestational hypertension and preeclampsia differed between the folic acid categories.\n\nConclusion: Periconception folic acid supplementation is associated with lower uteroplacental vascular resistance and higher blood pressures during pregnancy. The effects are small and within physiologic ranges and seem not associated with the risk of hypertensive pregnancy disorders. (C) 2009 Elsevier B. V. All rights reserved.”
“The

influence of semipolar (20 (2) over bar1) MEK pathway InGaN/GaN multi quantum well (MQW) structure parameters such as well composition and thickness (d(w)), barrier thickness, as well as total number of periods on the structural and optical properties of the MQWs grown on (20 (2) over bar1) GaN by metal organic chemical vapor deposition was investigated. At d(w) < 3 nm, the MQW stacks were very robust with respect to changes in the barrier thickness or the number of periods in the MQW stack, and 30 period (2.5 nm In0.25Ga0.75N/8.5 nm GaN) MQWs exhibiting bright luminescence at 465 nm were demonstrated. For all samples with d(w) < 3 nm in this study, one-dimensional relaxation via misfit dislocations did not lead to any deterioration of the optical properties of the films, and a decrease in the photoluminescence intensity was only observed after the on-set of two-dimensional relaxation via non-basal plane defects. (C) 2013 The Japan Society of Applied Physics”
“MnOx-CeO2, MnOx and CeO2 catalysts were synthesized by the sol-gel method.