It is characterised by placental vascular dysfunction Despite th

It is characterised by placental vascular dysfunction. Despite the numerous studies on preeclampsia, studies evaluating proliferation of villous trophoblasts in preeclamptic placentas are limited. Ki67 is a proliferation marker that expresses in the nuclei of proliferating

cells. In KU-57788 nmr this study, we examined the proliferation of villous trophoblasts in placentas of preeclamptic patients by using Ki67 and compared it with placentas of normal pregnant patients. The current study is a prospective one, including 15 placentas from preeclamptic patients and 14 placentas from normal pregnancies as controls. For detection of proliferation in villous trophoblasts, Ki67 was used. The Ki67 index was 11.48 +/- 1.67% in normal patients and 15.53 +/- 2.28% in preeclamptic patients. There was a difference

in Ki67 index between the two groups (p smaller than 0.001). Our results support the opinion that trophoblasts undergo regeneration hyperplasia as a result of injuries arising on the villous surface in preeclampsia. Proliferation of trophoblasts may contribute the development of preeclampsia.”
“We investigated the effects of natural light at night p38 MAPK inhibitor (LAN) in the field and artificial LAN in the laboratory on the circadian rhythm of pupal eclosion in a tropical wild type strain of Drosophila jambulina captured at Galle, Sri Lanka (6.1 degrees N, 80.2 degrees E). The influence of natural LAN, varying in intensity from 0.004 lux (starlight intensity) to 0.45 lux (moonlight intensity), on the entrainment pattern of the circadian rhythm of eclosion at 25 degrees +/- 0.5 degrees C was examined by subjecting the mixed-aged pupae to natural cycles of light and darkness at the breeding site of this strain in the field. The eclosion peak was similar to 2 h prior to sunrise, and the 24 h rhythmicity was the most robust. Effects of artificial LAN at 25

degrees +/- 0.5 degrees C were determined in the laboratory by subjecting pupae to LD 12: 12 cycles in which the light intensity of the photophase was 500 lux in all LD cycles, while that of the scotophase was either 0 lux (complete darkness, DD), 0.5, 5, or 50 lux. In the 0 lux LAN condition (i.e., the control P505-15 in vivo experiment), the eclosion peak was similar to 2 h after lights-on, and the 24 h eclosion rhythm was not as strong as in the 0.5 lux LAN condition. The entrainment pattern in 0.5 lux LAN was strikingly similar to that in the field, as the 0.5 lux LAN condition is comparable to the full moonlight intensity in the tropics. LAN at 0.5 lux dramatically altered both parameters of entrainment, as the eclosion peak was advanced by similar to 4 h and the 24 h eclosion rhythm was better than that of the control experiment. LAN at 5 lux, however, resulted in a weak eclosion rhythm that peaked in the subjective forenoon. Interestingly, the 50 lux LAN condition rendered the eclosion events unambiguously arrhythmic.

We determined the aspect ratio of stereoscopically viewed ellipse

We determined the aspect ratio of stereoscopically viewed ellipses that appeared circular. We show that observers’ judgements of aspect ratio were affected by surface slant, but that the largest image vertical:horizontal aspect ratio that was considered to be a surface with a circular profile was always found for

surfaces close to fronto-parallel. This is not consistent with a Bayesian model in which the horizontal-vertical illusion arises from a non-uniform prior probability distribution for slant. Rather, we suggest that assumptions about the slant of surfaces affect apparent aspect ratio in a manner that is more heuristic, and partially dissociated from apparent slant. (C) 2012 Elsevier Ltd. All rights reserved.”
“Background: In this study we assessed the efficacy and the tolerance of postoperative radiochemotherapy GSI-IX purchase in gastric cancer.\n\nMaterial and methods: A group of 66 patients HSP inhibitor with gastric cancer after radical surgery was treated postoperatively with radiochemotherapy during 2003-2006. In this group

were 47 men and 19 women Median age was 57 years Total gastrectomy was performed in 49 patients. Histologically adenocarcinomas dominated and stages pT2-T3 and pN1-N2 Radiochemotherapy was used in all cases After the first cycle of chemotherapy with 5-fluorouracil (425 mg/m(2)) and leucovorin (20 mg/m2) patients were irradiated (45 Gy in 25 fractions). During radiotherapy they received

2 cycles of a reduced dose of 5-Fu (400 mg/m(2)) and leucovorin (20 mg/m(2)). After radiotherapy chemotherapy was continued (2 cycles)\n\nResults: Fifty-three patients completed treatment as planned. Twenty-nine patients died. Thirty-seven are alive The 1-, 2-and 5-year overall survival rates were 83, 62 and 50% respectively. check details Disease-free survival rates were 75, 59 and 48% respectively. Haematological toxicity was observed in 54% of patients Gastrointestinal toxic effects were observed in 20 patients. Acute toxicity of liver, heart and lungs was not observed In this group were identified independent prognostic factors which influence the overall survival the stage of cancer and the number of involved lymph nodes\n\nConclusions: Postoperative radiochemotherapy in patients with gastric cancer is effective and well tolerated. Independent prognostic factors which influence the overall survival are the stage of cancer, the number of involved lymph nodes and recurrence.”
“Background: Ectopy-induced cardiomyopathy is an increasingly recognized cause of reversible left ventricular (LV) dysfunction. The underlying mechanisms remain unknown. Our goal was to create an animal model for ectopy-induced cardiomyopathy.\n\nMethods: Eleven mongrel dogs underwent the implantation of a dual-chamber pacemaker. Four dogs served as the control group and seven as the paced group.

Taken together, these findings indicate that Rab1A is the first c

Taken together, these findings indicate that Rab1A is the first crucial component of the anterograde melanosome transport machinery to be identified in mammalian skin melanocytes.”
“Antigen presenting cells express MHC class II molecules bound to peptide fragments and are responsible for activating CD4(+) T cells that then broadly influence many branches of the immune response. A growing interest in developing strategies to therapeutically influence the peptides to which naive CD4(+). T cells are exposed has led to the hunt for small molecules

that modulate peptide presentation through the MHC class 11 pathway. Over the past decade a number of small molecules have been STI571 datasheet discovered that show surprising diversity in Doramapimod solubility dmso both structure and putative mechanisms. This review discusses how these small molecules were identified and compares the mechanisms by which they may act with what is known about the endogenous peptide exchanger, HLA-DM. (C) 2011 Elsevier Ltd. All rights reserved.”
“The asymmetric unit of the title compound, [MnBr2(C6H4NO2)(H2O)(2)](n), contains one monomeric unit of the neutral linear coordination polymer. The Mn3+ ions are bridged by anionic pyridine-2-carboxylate (pic) ligands, thereby forming a chain-like structure along the c axis, and are six-coordinated

in a distorted octahedral environment by two O atoms of the two different carboxylate groups, two O atoms of two water molecules and two Br atoms. The complex displays intermolecular O-H center dot center dot center dot Br, O-H center dot center dot center dot N, O-H center dot center dot center dot O, C-H center dot center dot center dot O and C-H center dot center dot center dot Br SIS3 price hydrogen bonding.

There may also be intermolecular pi-pi interactions between adjacent pyridine rings, with a centroid-centroid distance of 3.993 (8) angstrom.”
“Background. Native arteriovenous fistula (AVF) is the vascular access of choice and its use cf. catheters is associated with sustained reduction in mortality. This may be due to factors beyond dialysis catheter-associated sepsis. This study aimed to investigate the impact of AVF formation on the spectrum of cardiovascular factors that might be important in the pathophysiology of cardiovascular diseases in chronic kidney disease (CKD) patients.\n\nMethods. We recruited 43 pre-dialysis patients who underwent AVF formation. Patients were studied 2 weeks prior to AVF operation and 2 weeks and 3 months post-operatively. Haemodynamic variables were measured using pulse wave analysis, carotid femoral pulse wave velocity (CF-PWV) by applanation tonometry and AVF blood flow by Doppler ultrasound. Bioimpedence analysis was performed and patients underwent serial transthoracic echocardiography.\n\nResults. AVF formation was successful in 30/43 patients.

As the type of anchorage of adhesion ligands to materials surface

As the type of anchorage of adhesion ligands to materials surfaces is known to determine the mechanical balance of adherent cells, we investigated herein the behaviour of endothelial cells under physiological shear stress conditions. The adhesion ligand fibronectin was anchored to polymer surfaces of four physicochemical characteristics exhibiting covalent and non-covalent attachment as well as high and low hydrophobicity. The in situ analysis combined with cell tracking of shear stress-induced effects on cultured isolated cells and monolayers under venous (0.5 dyn/cm(2)) and arterial check details (12 dyn/cm(2)) shear stress over a time period of 24 h revealed distinct differences in their morphological and migratory

features. Most pronounced, unidirectional and bimodal migration

patterns of endothelial cells in or against flow direction were found in dependence on the type of substrate-matrix anchorage. Combined by an immunofluorescent analysis of the actin cytoskeleton, cell-cell junctions, cell-matrix adhesions, and matrix reorganization these results revealed a distinct balance of laminar shear stress, cell-cell contacts and substrate-matrix anchorage in affecting endothelial cell fate under flow conditions. This analysis underlines the importance of materials surface parameters as well as primary and secondary adhesion ligand anchorage in the CDK inhibition context of artificial blood Selleck ISRIB vessels for future therapeutic devices. (C) 2011 Elsevier Ltd. All rights reserved.”
“Although axonal regeneration after CNS injury is limited, partial injury is frequently accompanied by extensive functional recovery. To investigate mechanisms

underlying spontaneous recovery after incomplete spinal cord injury, we administered C7 spinal cord hemisections to adult rhesus monkeys and analyzed behavioral, electrophysiological and anatomical adaptations. We found marked spontaneous plasticity of corticospinal projections, with reconstitution of fully 60% of pre-lesion axon density arising from sprouting of spinal cord midline-crossing axons. This extensive anatomical recovery was associated with improvement in coordinated muscle recruitment, hand function and locomotion. These findings identify what may be the most extensive natural recovery of mammalian axonal projections after nervous system injury observed to date, highlighting an important role for primate models in translational disease research.”
“B23 (NPM/nucleophosmin) is a multifunctional nucleolar protein and a member of the nucleoplasmin superfamily of acidic histone chaperones. B23 is essential for normal embryonic development and plays an important role in genomic stability, ribosome biogenesis, and anti-apoptotic signaling. Altered protein expression or genomic mutation of B23 is encountered in many different forms of cancer. Although described as multifunctional, a genuine molecular function of B23 is not fully understood.

Additionally, several studies failed to use isomer-specific inter

Additionally, several studies failed to use isomer-specific interpretation in order to obtain more detailed insight into environmental processes, for example, for observed isomer shifts during air-water fluxes. The o,p’-/p,p’-ratios of DDT and its main metabolite DDD have been detected more or less on the same level, whereas the isomers of the second main metabolite DDE were definitely depleted by the o,p’-isomer in all environmental compartments, indicating a general isomer-specific differentiation during DDT metabolism.”
“Background Poor motor skills have been associated with peer relationship difficulties,

with lower peer preference and greater likelihood of suffering from withdrawal and low self-worth. Most research

into these relationships has focused upon children with motor problems and on activities involving physical skills (play/sport). The current study examined Stattic the link between motor performance and peer relations in 9- to 12-year-old children in both physical and non-physical (schoolwork) settings using a community sample.\n\nMethods https://www.selleckchem.com/products/ly2606368.html Participants were 192 school children whose motor performance was tested using the Movement Assessment Battery for Children. Peer acceptance was assessed using the Peer Rating Scale and teachers completed the Peer Exclusion subscale of the Child Behaviour Scale to indicate each child’s peer status. Children were also asked to indicate

their level of physical activity and their perceived freedom in leisure using self-report questionnaires.\n\nResults Children with poor motor performance had lower levels of physical activity, and freedom in leisure and were less preferred by their peers in both play and classroom settings. LY3023414 inhibitor These effects were stronger for boys than for girls. Teacher indicated that children with poorer motor skills experienced higher levels of peer rejection in the classroom setting. When motor performance was separated into fine-and gross-motor performance it was found that only the latter was significantly correlated with peer acceptance in the play context but that fine-motor skills contributed significantly to variance in teacher ratings of peer exclusion in the classroom setting.\n\nConclusions The results support and extend earlier findings that children with poor motor performance are less accepted by their peers in play settings and provide some support for this extending to settings involving low levels of physical activity (classroom settings). The results similarly support previous findings that motor performance is associated with perceived freedom in leisure and with the likelihood of participating in active pursuits.”
“Thoracic aortic dissection (TAD). is a life-threatening vascular condition, in which matrix metalloproteinases (MMPs) are involved.

Clinical Relevance: This is a cadaveric study that attempts to si

Clinical Relevance: This is a cadaveric study that attempts to simulate the clinical parameters of Achilles tendon ruptures, repairs, and repair failures to examine the strength of different repair techniques.”
“Background: Suboptimal colon preparation is a significant barrier to quality colonoscopy. The impact of pharmacologic agents associated with gastrointestinal dysmotility on quality of colon preparation has not

been well characterized. Aims: Evaluate impact of opiate pain medication and psychoactive medications on colon preparation quality in outpatients undergoing colonoscopy. Methods: Outpatients undergoing colonoscopy at a single medical centre during a 6-month period were retrospectively identified. GSK2126458 Demographics, clinical characteristics and pharmacy records were extracted from electronic

medical records. Colon preparation adequacy was evaluated using a validated composite colon preparation score. Results: 2600 patients (57.3 +/- 12.9 years, 57% Selleckchem VX-661 female) met the inclusion and exclusion criteria. 223 (8.6%) patients were regularly using opioids, 92 antipsychotics, 83 tricyclic antidepressants and 421 non-tricyclic antidepressants. Opioid use was associated with inadequate colon preparation both with low dose (OR = 1.4, 95% CI 1.0-2.1, p = 0.05) and high dose opioid users (OR = 1.7, 95% CI 1.1-2.9, p = 0.039) in a dose dependent manner. Other significant predictors of inadequate colon PCI-34051 Epigenetics inhibitor preparation included use of tricyclics (OR = 1.9, 95% CI 1.1-3.0,

p = 0.012), non-tricyclic antidepressants (OR = 1.5, 95% CI 1.1-2.0, p = 0.013), and antipsychotic medications (OR = 2.2, 95% CI 1.4-3.4, p = 0.001). Conclusions: Opiate pain medication use independently predicts inadequate quality colon preparation in a dose dependent fashion; furthermore psychoactive medications have even more prominent effects and further potentiates the negative impact of opiates with concurrent use. (C) 2013 Editrice Gastroenterologica Italiana S.r.l. Published by Elsevier Ltd. All rights reserved.”
“The estimation of mutation rates and relative fitnesses in fluctuation analysis is based on the unrealistic hypothesis that the single-cell times to division are exponentially distributed. Using the classical Luria-Delbruck distribution outside its modelling hypotheses induces an important bias on the estimation of the relative fitness. The model is extended here to any division time distribution. Mutant counts follow a generalization of the Luria-Delbruck distribution, which depends on the mean number of mutations, the relative fitness of normal cells compared to mutants, and the division time distribution of mutant cells.

Two readers independently rated the level of MR imaging-depicted

Two readers independently rated the level of MR imaging-depicted BPE and the amount of MR imaging-depicted FGT by using a categorical scale: BPE was categorized as minimal, mild, moderate, or marked, and FGT was categorized as fatty, scattered, heterogeneously dense, or dense.\n\nResults: Compared with the odds ratio (OR) for a normal control, the OR for breast cancer increased significantly with increasing BPE: The ORs for moderate or marked BPE versus minimal or mild BPE were 10.1

(95% confidence interval [CI]: 2.9, 35.3; P < .001) and 3.3 (95% CI: 1.3, 8.3; P = .006) for readers 1 and 2, respectively. Similar odds were seen Oligomycin A in vivo when the false-positive controls were compared with the breast cancer cases: The ORs for moderate or marked BPE versus minimal or mild BPE were 5.1 (95% CI: 1.4, 19.1; P = .005) and 3.7 (95% CI: 1.2, 11.2; P = .013) for readers 1 and 2, respectively. The breast cancer odds also increased with increasing FGT, but the BPE findings remained significant after adjustment for FGT.\n\nConclusion: Increased BPE is strongly

predictive of breast cancer odds. (C) RSNA, 2011″
“Background and Objectives: Quaternary lidocaine derivatives (QLDs) have recently received much attention because of their potential application in prolonged or sensory-selective local anesthesia. However, associated tissue toxicity is an impeding factor that makes QLDs unfavorable for clinical use. Based on the proposed intracellular site of action, we hypothesized that nerve blocks obtained from lower concentrations of QLDs would be enhanced by the coapplication of RG7112 extracellularly acting site 1 sodium-channel blocker, resulting in prolonged block duration but with minimal tissue toxicity.\n\nMethods: Quaternary

lidocaine derivatives (QX-314 or QX-222), site 1 sodium-channel blockers (tetrodotoxin [30 mu M] or saxitoxin [12.5 mu M]), or both were injected in the vicinity of the sciatic nerve. Thermal nociceptive block was assessed using a modified hot plate test; motor block by a weight-bearing test. Tissue from the site AZD0530 in vitro of injection was harvested for histological assessment.\n\nResults: Coapplication of 25 mM QX-314 or 100 mM QX-222 with site 1 sodium-channel blockers produced an 8- to 10- fold increase in the duration of nerve blocks (P < 0.05), compared with QLDs or site 1 blockers alone. Quaternary lidocaine derivatives elicited severe myotoxicity; this was not exacerbated by coinjection of the site 1 sodium-channel blockers.\n\nConclusions: Coadministration of site 1 sodium-channel blockers and QLDs greatly prolongs the duration of peripheral nerve block without enhancing local tissue injury, but minimal myotoxicity still persists. It is not clear that the risks of QLDs are outweighed by the benefits in providing prolonged nerve blockade.


“Chorismate mutase (CM) is a key enzyme in the shikimate p


“Chorismate mutase (CM) is a key enzyme in the shikimate pathway which is responsible for the synthesis of aromatic amino acids. There are two classes of CMs, AroQ and AroH, and several pathogenic bacteria have been reported to possess a subgroup of CMs designated AroQ gamma. These CMs are usually exported to the periplasm or outside the cell; in a few cases, they have been reported to be involved in virulence and their

precise role is currently unknown. Here, we report that the important rice pathogen Xanthomonas oryzae pv. oryzae XKK.12 produces an AroQ gamma CM which we have purified and characterized from spent supernatants. This enzyme is synthesized in planta and X. oryzae pv. oryzae knock-out mutants are hypervirulent https://www.selleckchem.com/products/ly3039478.html to rice. The role of this enzyme in X. oryzae selleck pv. oryzae rice virulence is discussed.”
“In order to study the effects of CO2 laser moxibustion on the pain and inflammatory cytokine expression in the spinal dorsal horn

of rats with monosodium iodoacetate- (MIA-) induced knee osteoarthritis (KOA), we designed an experiment by randomly assigning 8 SD rats into 3 groups, namely, a CO2 laser moxibustion group, a sham treatment group, and a blank control group. The treatment group received a laser moxibustion on acupoint Dubi (ST 35; 5 min/treatment, 1 treatment/day) for 8 days, and after treatment, the rats exhibited significantly increased interhindpaw differences compared with their preinduction values. Meanwhile, cytokine microarray analysis showed that one cytokine (TIMP-1) was significantly upregulated and two cytokines (Agrin and MMP-8) were significantly downregulated in treatment group. The present study suggested

that CO2 laser moxibustion created certain pain reduction in the rats with MIA-induced KOA and find more significantly inhibited the expression of most inflammatory cytokines in the ipsilateral spinal dorsal horn.”
“We studied the morphofunctional and cytophysiological status of macrophages emigrating from BCG granulomas forming in spleen and free splenic macrophages that are not associated with granulomas. The experimental BCG granulomatosis was induced by intravenous injection of male BALB/c mice with BCG vaccine mycobacteria. The number of granulomas in spleen, their diameter, the proportion of granuloma macrophages with mycobacteria, the number of mycobacteria in granuloma macrophages, the proportion of live bacteria in granuloma macrophages and the number of granulomas macrophages capable of expressing IL-1 alpha, TNF-alpha, GM-CSF were evaluated. BCG granulomas were explanted in cultures in vitro. Fractions, containing free splenic macrophages from BCG-infected animals, were explanted in separate cultures in vitro.

We analyzed blush coverage extent and intensity in the cultivar H

We analyzed blush coverage extent and intensity in the cultivar Honeycrisp to 1) define categories of marketable blush in terms relating to device-independent color measurements; 2) assess relationships among a modified anthocyanin index (AI(m)) calculated from spectral measurements, colorimetry (CO), and human judgment of apple blush intensity; 3) assess the efficacy of digital image analysis (DIA) of color-calibrated digital photography learn more as a tool to measure blush coverage extent; and 4) explore differences between human judgment of blush coverage

extent and DIA. AI(m) and CO were both effective in providing statistical categorical separation among five classes of apple blush in ‘Honeycrisp’:

“non-blush,” “slight non-marketable blush,” “minimum quality marketable blush,” “clear marketable blush,” and “outstanding blush” as judged by human participants. The boundary between blush and non-blush was judged to be a hue angle less than 49.0 +/- 3.1 h(ab) in CIELAB L*C(ab)*h(ab) color space and an AI(m) value greater than 4.3 +/- 1.3 at alpha <0.05. DIA was less sensitive and did not show statistically significant differences between “clear marketable blush” and “outstanding marketable blush,” although its use to distinguish the other categories was successful. All methods of analysis resulted in high agreement with respect to the blush/non-blush boundary (Cohen’s kappa >= 0.897).”
“Reasons for performing study: Repair of incisional hernias in horses has been described previously; however, this report describes www.selleckchem.com/products/dorsomorphin-2hcl.html Dacomitinib the outcome of primary closure of incisional hernias in a large number of horses and compares these results with those of mesh implantation.\n\nObjective:

To report the perioperative care, complications and long-term outcome of primary closure of incisional hernias in horses and to compare these results with a second population of horses in which prosthetic mesh was used.\n\nMethods: Medical records of horses undergoing an incisional herniorrhaphy between 1998 and 2009 were reviewed. Information obtained included case details, factors from the initial surgery that contributed to the hernia formation, method of hernia repair and outcome. Comparisons between horses with and without mesh were made using logistic regression.\n\nResults: Thirty-eight horses with primary closure and 9 horses with mesh implantation met inclusion criteria. Long-term follow-up for cases in which a mesh was not used was available for 25 cases; of these, 21 horses (84%) had a normal cosmetic appearance and 4 (16%) had a visible defect. There was no significant difference between the 2 repair methods in terms of age, sex, breed, weight, size of the hernia, number of defects, timing of the repair or cosmetic outcome.

Nanocrystalline calcite and metal nanoparticles can also block ex

Nanocrystalline calcite and metal nanoparticles can also block extreme level of UV.”
“Traumatic brain injury is one of the leading causes of death and disability among young people. However outcomes from traumatic brain injury can be improved by use of parameters such as intracranial pressure monitoring (ICP) to guide treatment, early surgical intervention and management of these patients in a neurosurgical centre.

To examine the incidence of traumatic brain injury, compliance with best practice

guidelines and outcomes in patients admitted to an intensive care unit in a major teaching hospital in Ireland.

Retrospective chart review.

Forty-six patients were admitted over a 3-year period, half of whom had GCS < 8. Medical management was appropriate but only two patients were transferred to a neurosurgical centre and none received ICP monitoring. Overall SN-38 mw mortality of 37% was higher than international norms.

Irish patients with severe head injury do not currently receive care in accordance with international evidence-based guidelines.”
“Objective To compare health care

resource utilization before and after minimally invasive lumbar decompression (MILD) procedure. Design Case series. Setting Veteran’s Administration health care system. Subjects All patients who underwent MILD at the author’s institution. Methods The charts of 22 patients who underwent MILD procedure were reviewed. The primary comparison

was between the amount of time spent in specialty care and the number of interventional procedures performed before and after MILD. Each patient’s Selleck CFTRinh-172 current status and need for continued specialty care were secondary measures. Patient satisfaction with MILD, and pre- and post-VAS were recorded as well. Results After MILD, there was close to 45% reduction in time spent in specialty care and an almost fourfold decrease in number of interventional pain procedures performed on patients with lumbar spinal stenosis (LSS). Over half the patients no longer required chronic pain management to treat their LSS symptoms. Conclusions Not only is MILD a reliable method to treat LSS, MILD also appears to reduce the consumption of limited health care learn more resources.”
“Two typical kinds of InGaN quantum dots (QDs) have been grown on sapphires under different conditions through modifying the NH(3) flow rate using metal-organic chemical vapor deposition: small spherical dots with a high dot density and large truncated pyramidal dots with a low dot density. The small dots have been found typically coherent and defect-free, while a strain relaxation has often been observed in the large dots. Consequently, this leads to a massive difference in optical properties between them. The optical properties have been investigated by means of temperature-dependent and excitation power-dependent microphotoluminescence measurements.