As the temperature further decreases below similar to 80 K, a cro

As the temperature further decreases below similar to 80 K, a crossover to the Mott variable-range-hopping conduction process is observed. Taken together with our previous measurements on rho(T) of ZnO polycrystalline films in the temperature range 2-100 K [Y. L. Huang et al., J. Appl. Phys. 107, 063715 (2010)], this work establishes a quite complete picture of the overall electrical conduction mechanisms in the GSK1838705A ZnO material from liquid-helium temperatures up to 500 K. (C) 2011 American Institute of Physics. [doi: 10.1063/1.3638120]“
“We aimed to compare the

outcomes of native tissue vs. biological graft-augmented repair in the posterior compartment. We hypothesized that the addition of graft would result in superior anatomic and functional outcomes.

A retrospective review of posterior repairs between 2001 and 2008 was performed to compare the anatomic and

functional outcomes between native tissue and graft-augmented techniques. Mann-Whitney and chi-square tests were used. Power calculation determined that 32 subjects were needed in each group.

One hundred twenty-four native tissue and 69 graft-augmented repairs were performed with a median follow-up GNS-1480 of 35.8 months (range, 6 to 157 months). Anatomic success was similar for native tissue vs. graft (Bp < -1, 86% vs. 80% and Bp a parts per thousand currency signaEuro parts per thousand 0, 97% vs. 97%; all p > 0.05). Postoperative splinting and incomplete evacuation was greater in the graft group (splinting, 85% vs. 68%; p = 0.04 and incomplete evacuation, 85% vs. 64%; p = 0.03).

Long-term success of posterior repair is high. Graft augmentation does not appear to improve anatomic or functional outcomes.”
“Esophageal carcinoma rarely metastasizes to brain.

In our center, among 504 cases of esophageal cancer registered for treatment during Sapitinib solubility dmso a 15-year (1990-2005) period, brain metastasis from esophageal carcinoma was detected in only 1 case. An unusual case of esophageal carcinoma that presented with brain metastasis is reported here.”
“A good understanding of the electronic conduction processes through nanocontacts is a crucial step for the implementation of functional nanoelectronic devices. We have studied the current-voltage (I-V) characteristics of nanocontacts between single metallic RuO2 nanowires and contacting Au electrodes, which were pre-patterned by simple photolithography. Both the temperature behavior of contact resistance in the low-bias voltage ohmic regime and the I-V curves in the high-bias voltage non-ohmic regime have been investigated. We found that the electronic conduction processes in the wide temperature interval 1-300 K can be well described by the fluctuation-induced tunneling (FIT) conduction theory. Taken together with our previous work [Lin et al.

Methods: Data included vaginally delivered twins (>= 36 weeks)

Methods: Data included vaginally delivered twins (>= 36 weeks) from openhagen University Hospitals (2001-2009). The association between delivery interval and adverse outcome parameters was compared for monochorionic (MC) and dichorionic (DC) twins Pexidartinib mouse by multiple linear regression. Predictors were studied by logistic regression.

Results: There were 554 twin pairs, of which 57 were MC and 485 DC. We found no difference in the decrease of pH (p = 0.912) and Apgar (p = 0.609) in relation to increasing time interval. Neonatal unit (NICU) admissions did not differ (p = 0.167). Apgar <= 7 (p < 0.001) and pH <= 7.20 (p < 0.002) increased

first twin risk of NICU admission, whereas first (p = 0.001) or second (p < 0.001) twin Apgar <= 7 and second twin pH <= 7.00 (p = 0.003) increased second twin risk of NICU admission.

Conclusions: Increasing delivery interval was associated with a significant decrease in pH and Apgar, but there was no difference between MC and DC twins. Low Apgar of the first twin increased the risk of second twin NICU admission.”
“BACKGROUND

Injection of dermal fillers is one PXD101 research buy of the most commonly performed cosmetic procedures. Serious complications from fillers are rare but potentially devastating to patients and physicians. Skin necrosis, such as nasal alar necrosis, is one of the most feared serious complications of dermal fillers, but there is a paucity of literature on the incidence of such events, BMN 673 mw as well as potential treatment options.

METHODS We present a review of the literature and three cases of nasal alar necrosis after dermal filler injection.

CONCLUSION Nasal

alar necrosis associated with dermal filler injection is a rare event. Proper technique and recognition of risk factors may reduce the incidence of this complication. Physicians should be aware of early intervention and treatment options should impending necrosis become apparent.”
“Objective: To investigate if first trimester lipids, sonographic parameters and serum markers are related to small-and large-for-gestational age (SGA, LGA) infants.

Methods: This study was conducted at Baskent University Adana Research Center between December 2009 and July 2011 and enrolled 433 women. Blood samples were drawn to measure fasting blood glucose, serum triglycerides, cholesterol, very low-density lipoprotein, low-density lipoprotein, high-density lipoprotein, f beta-hCG and pregnancy associated protein-A (PAPP-A) at the first trimester. Crown rump length and nuchal translucency were measured as suggested by the fetal medicine foundation.

Results: LGA group was significantly taller (p = 0.016) and SGA group had significantly greater BMI (0.025). SGA fetuses were born at a significantly earlier gestational age (p = 0.001).

Anti-ulcer activity was evaluated by measuring the ulcer index (U

Anti-ulcer activity was evaluated by measuring the ulcer index (UI) and ulcer inhibition. The UI was significantly reduced in all treated animals. A dramatic decrease in the UI was observed following the administration of total extract (100 mg/kg, p < 0.001) and CHCl3 fraction (42 mg/kg, ***p < 0.001) in comparison with the control group. The percentage ulcer inhibition with total extract at a dose of 100 mg/kg (97.66%) and CHCl3 fraction at a dose of 42 mg/kg (96.96%) was found to be higher (p < 0.001) than the reference group (cimetidine 100 mg/kg) (87.08%).

The pharmacological and histological results of the present study proved that the aerial PCI-32765 inhibitor flowering parts of CBB possess preventive activity against peptic ulcer, supporting

the traditional assertion in southern Iranian folk medicine.”
“The optical-absorption edge of single crystals of CaWO4, SrWO4, BaWO4, and PbWO4 has been measured under high pressure up to similar to 20 GPa at room temperature. From these measurements, we have obtained the evolution of the band-gap energy with pressure. We found a low-pressure range (up to 7-10 GPa) where alkaline-earth tungstates present a very small E-g pressure dependence (-2.1 < dE(g)/dP < 8.9 meV/GPa). In contrast, in the same pressure range, PbWO4 has a pressure coefficient of -62 meV/GPa. The high-pressure range is characterized in the four compounds by an abrupt decrease of Eg followed buy GDC 0032 by changes in dE(g)/dP. The band-gap collapse is larger than 1.2 eV in BaWO4. We also calculated the electronic-band structures and their pressure evolution. The calculations allow us to interpret experiments considering the different electronic configurations of divalent metals. Changes in the pressure evolution of E-g are correlated with the occurrence of pressure-induced phase transitions. The band structures

for the low-and high-pressure phases are also reported. No metallization of any of the compounds is detected in experiments nor is it predicted by the calculations. (C) 2011 American Institute of Physics. [doi: 10.1063/1.3622322]“
“Purpose: This Study Sought to identify sociodemographic, psychosocial, and clinical factors associated with increased postsurgery depressive symptoms among inner-city minority patients MLN4924 research buy recovering from a mandibular fracture.

Patients and Methods: Surveys of African American and Hispanic adults receiving treatment at King/Drew Medical Center for a mandible fracture (n = 98) are used to identify factors associated with increased postsurgery depressive symptoms. Using correlation coefficients and t tests, bivariate relationships between patient characteristics and depressive symptoms at first follow-up were examined. Multiple regression analysis was used, predicting depressive symptoms at 1 month postadmission by entering covariates that were found to be significant at the bivariate level.

21 to 2 32) for CHF

21 to 2.32) for CHF Ulixertinib decompensation and 0.21 (95% CI, 0.08 to 0.55) for compensation. The corresponding uric acid differences were 0.41 (95% CI, 0.20 to 0.62) and -1.00 (95% CI, 1.72 to 0.27), respectively. The odds ratios for initiation and discontinuation of diuretic were 3.32 (95% CI, 3.06 to 3.61) and 0.39 (95% CI, 0.35 to 0.44).

Conclusions: CHF decompensation

and diuretic use are both independently associated with increased odds of hyperuricemia among men with a high cardiovascular risk profile, whereas CHF recovery and diuretic discontinuation are associated with substantially lower odds of hyperuricemia. (C) 2011 Elsevier Inc. All rights reserved. Semin Arthritis Rheum 41:471-476″
“A new triterpenic diester, 3,21-dipalmitoyloxy-16 beta,21 alpha-dihydroxy-beta-amyrine (1), along with two natural cyclitols, conduritol C (2) and viburnitol (3), four known triterpenes (4-7), and seven known flavonoids Ruboxistaurin in vitro (8-14) were isolated from the aerial parts of Chrysanthemum macrocarpum. Their structures were established on the basis of extensive 1D and 2D NMR (H-1, C-13, COSY, HMBC, HSQC, and ROESY) and ESIMS studies. The chloroform fraction, taraxasterol (4) and beta-sitosterol (7) were investigated for their antibacterial activity against Staphylococcus aureus, Enterococcus faecalis, Escherichia

coli, Pseudomonas aeruginosa and Klebsiella pneumoniae. The chloroform fraction and taraxasterol (4) showed a weak antibacterial activity and were evaluated for their cytotoxic activity against human colon cancer HT-29 cells and human prostate carcinoma PC3 cells. The results indicated Belinostat that both the chloroform fraction and taraxasterol (4) inhibited cell proliferation of both PC3 and HT-29 cells. (C) 2013 Phytochemical Society of Europe. Published by Elsevier B.V. All rights reserved.”
“P>New therapeutic agents – mainly those applied in treatment of cancer and in immunologically mediated diseases – can elicit previously unknown cutaneous adverse drug reactions (ADR) and each dermatologist should be familiar with these clinical pictures. Established classification systems fail

to adequately represent ADR to these new therapeutics, which often belong to the group of biological immune response modifiers. Thus, a new classification system was recently proposed for ADR to these new drugs and this paper gives an overview of typical clinical entities. The emphasis is put on ADR elicited by EGFR inhibitors and by TNF antagonists. Current strategies for management of these ADR, as well as for selected other new therapeutics and their typical ADR, are discussed.The fast development of new drugs and their wider application will undoubtedly continue to be a challenge for dermatologists.”
“Background: Involvement of the gluteus medius muscle has been reported in girdle myopathies or facioscapulohumeral myopathies.

Mean volumes of total colloids (aprotinin

group: 7040ml;

Mean volumes of total colloids (aprotinin

group: 7040ml; and placebo group: 120 +/- 80ml; P0.05) and packed red blood cells (aprotinin group: 380 +/- 90ml; and placebo group: 550 +/- 200ml; P0.004) were less in the aprotinin group than in the placebo group. Mean urine output during surgery was greater in the aprotinin group than in the placebo group (320 +/- 200ml vs 150 +/- 70ml, respectively; P0.003). Mean blood urea nitrogen and serum creatinine values after surgery were similar between the groups. Complications of aprotinin included anaphylaxis Galardin datasheet (one patient) and rash (one patient); no deaths occurred.

ConclusionsAprotinin was associated with decreased packed red blood cell transfusion requirements in children undergoing craniofacial surgery, with no renal toxicity or death.

Aprotinin is no longer available for clinical use in the USA because of adverse effects in adults; re-evaluation of aprotinin is warranted for children scheduled to undergo surgery involving potentially high blood loss.”
“Mesh colposacropexy is a procedure performed for massive genital prolapse with a good success rate and a low incidence of intraoperative and postoperative complications. Mesh infection is an uncommon but feared complication that requires mesh removal which has hitherto been done only transvaginally or through laparotomy. We are reporting three cases of infected mesh colposacropexies which were successfully removed Vorinostat Epigenetics inhibitor using the laparoscopic technique.”
“The effects of calcium and high pressure (HP) treatment on the thermal properties of soybean proteins

were analyzed in soybean protein isolate (SPI), a beta-conglycinin-enriched fraction (7SEF), a glycinin-enriched fraction (11SEF), and whey protein concentrate (WPC). For beta-conglycinin, the temperature of denaturation (Td) decreased with up to 12.5 mM or 6.2 mM calcium in SPI CX-6258 mw and 7SEF, respectively. This parameter increased when calcium was more concentrated. The Td of glycinin increased for every assayed calcium concentration. The values of changes in Td (Delta Td) depended on calcium concentration and the proportion of beta-conglycinin and glycinin in the samples. Activation energy decreased for glycinin in the presence of calcium. HP treatment promoted denaturation of beta-conglycinin and glycinin. Calcium protected both proteins in SPI, 7SEF and 11SEF at 200 MPa, and protected glycinin in SPI and 7SEF at 400 and 600 MPa. Nevertheless, calcium increased the degree of denaturation of beta-conglycinin in 7SEF at 600 MPa. In the absence of calcium, partially-HP-denatured polypeptides exhibited the same or lower Td than controls, whereas in its presence, they exhibited higher Tds than their respective controls. (C) 2010 Elsevier Ltd. All rights reserved.

The mean bursting pressure for mechanical

stapler anastom

The mean bursting pressure for mechanical

stapler anastomosis was 60.7 mmHg and did not differ from the thermofusion (p = 0.15). Furthermore, the mean bursting pressure for thermofusion of rat colonic samples was up to 69.5 mmHg for a compressive pressure of 140 mN/mm(2).

These results confirm the feasibility to create experimental intestinal anastomoses using bipolar radiofrequency-induced thermofusion. The stability of the induced thermofusion showed no differences when compared to that of conventional anastomoses. CP-868596 research buy Bipolar radiofrequency-induced thermofusion of intestinal tissue represents an innovative approach for achieving gastrointestinal anastomoses.”
“Background: Cardiovascular magnetic resonance (CMR) is the current gold standard for the assessment of left ventricular (LV) function. Repeated breath-holds are needed for standard multi-slice 2D cine steady-state free precession sequences (M2D-SSFP). Accelerated single breath-hold techniques suffer from low contrast between blood pool and myocardium. In this study an intravascular contrast agent was prospectively compared to an extravascular contrast agent for the assessment of LV function using a single-breath-hold 3D-whole-heart cine SSFP sequence (3D-SSFP).

Methods: LV function was assessed in fourteen patients on a 1.5 T MR-scanner (Philips selleck inhibitor Healthcare) using 32-channel coil technology. Patients

were investigated twice using a 3D-SSFP sequence (acquisition time 18-25 s) after Gadopentetate dimeglumine (GdD, day 1) and Gadofosveset trisodium (GdT, day 2) administration. Image acquisition was accelerated using sensitivity encoding in both phase encoding directions (4xSENSE). CNR and BMC were both measured between blood and learn more myocardium. The CNR incorporated noise measurements, while

the BMC represented the coeffiancy between the signal from blood and myocardium [1]. Contrast to noise ratio (CNR), blood to myocardium contrast (BMC), image quality, LV functional parameters and intra-/interobserver variability were compared. A M2D-SSFP sequence was used as a reference standard on both days.

Results: All 3D-SSFP sequences were successfully acquired within one breath-hold after GdD and GdT administration. CNR and BMC were significantly (p < 0.05) higher using GdT compared to GdD, resulting in an improved endocardial definition. Using 3D-SSFP with GdT, Bland-Altman plots showed a smaller bias (95% confidence interval LVEF: 9.0 vs. 23.7) and regression analysis showed a stronger correlation to the reference standard (R-2 = 0.92 vs. R-2 = 0.71), compared to 3D-SSFP with GdD.

Conclusions: A single-breath-hold 3D-whole-heart cine SSFP sequence in combination with 32-channel technology and an intravascular contrast agent allows for the accurate and fast assessment of LV function.

These concerns have prompted some in the US neurology community a

These concerns have prompted some in the US neurology community as well as patient advocacy groups to question the current regulatory requirements for both establishing bioequivalence as well as product substitution. Screening Library ic50 In addition, recent data have questioned the actual cost savings associated with generic substitution in this unique patient population. This article reviews current regulatory requirements and pharmacokinetic, biopharmaceutical, and clinical outcome issues that clinicians,

pharmacists, and policymakers should consider regarding generic substitution of these complicated agents.”
“Neurocytomas are relatively rare central nervous system tumors first described in intraventricular sites but increasingly recognized in the brain and spinal cord parenchyma. Herewith, we report a case of a 3-year-old girl with generalized seizures. Computed tomography and magnetic resonance imaging revealed a lesion in the left frontal lobe. Angiography showed minimal vascularity. The tumor was totally excised. Histopathologic examination demonstrated an extraventricular neurocytoma. On follow-up magnetic resonance

imaging after 1 year, no evidence of tumor recurrence was noted. Cerebral neurocytomas are histologically low-grade tumors and radical surgery is curative; they should be included in the differential diagnosis of cerebral tumors in children.”
“Atopic MG-132 mw dermatitis is a common chronic skin disorder whose management is complex. Topical corticosteroids have been the mainstay of atopic dermatitis treatment for more than 50 years but have multiple side effects. Topical calcineurin inhibitors including tacrolimus and pimecrolimus are safe and efficacious in atopic dermatitis. In 2005 the click here FDA issued black box warnings for pimecrolimus cream and tacrolimus ointment because of potential safety risks, including skin cancers and lymphomas. However, these concerns are not supported by current data. Topical calcineurin inhibitors are particularly indicated for treating patients with atopic dermatitis

in whom topical corticosteroid therapy cannot be employed or may cause irreversible side effects. They can be used advantageously in problem zones. A novel regimen of proactive treatment has been shown to prevent, delay and reduce exacerbations of atopic dermatitis. Therapy with topical calcineurin inhibitors should be managed by an experienced specialist and each patient should receive proper education on how to use them and what possible unwanted effects may be expected.”
“In principle, the use of anticonvulsant drugs does not differ between acute and remote symptomatic seizures, but control of acute symptomatic seizures requires simultaneous treatment of the underlying etiology. Prevention of remote seizures when the risk is known to be high has been the subject of intense efforts at antiepileptogenesis, but the optimal duration of treatment after an injury is not yet known.

The model indicates that both shear and bulk moduli are critical

The model indicates that both shear and bulk moduli are critical parameters accounting for both the homogeneous and inhomogeneous flows in MGs and MG-forming liquids. The elastic model is experimentally certified. We show that the elastic perspectives offers a simple scenario for the flow in MGs and MG-forming liquids and are suggestive for understanding the glass transition, plastic deformation, and nature and characteristics of MGs (C) 2011 American Institute of Physics. [doi: 10.1063/1.3632972]“
“The percolation threshold of carbon nanotubes (CNTs)/epoxy resin composites was simulated in the Bruggeman’ Effective-Medium Theory

based on experiment. Both distinct percolation effect and low percolation threshold in the aligned CNTs/epoxy composites were predicted. With the CNTs loading larger than the percolation EPZ5676 mouse threshold, the critical exponent of CNTs/epoxy composites rises rapidly with the increase of aspect ratio of CNTs. It is shown that the electrical conductivity of composites presents distinct aeolotropism, the percolation threshold is sensitive relative ALK inhibitor to the tiny change of the orientation factor, the aspect ratio, and the structure of CNTs in the composites matrix. The simulated results are consistent with the experimental results basically, and the discrepancy between simulated results and experimental

results has been interpreted reasonably. (C) 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2012″
“The ability to identify directional interactions that occur among multiple neurons in the brain is crucial to an understanding of how groups of neurons cooperate in order to generate specific brain functions. However, an optimal method of assessing these interactions has not been established. Granger causality has proven to be an effective method for the analysis of the directional interactions

between Semaxanib multiple sets of continuous-valued data, but cannot be applied to neural spike train recordings due to their discrete nature. This paper proposes a point process framework that enables Granger causality to be applied to point process data such as neural spike trains. The proposed framework uses the point process likelihood function to relate a neuron’s spiking probability to possible covariates, such as its own spiking history and the concurrent activity of simultaneously recorded neurons. Granger causality is assessed based on the relative reduction of the point process likelihood of one neuron obtained excluding one of its covariates compared to the likelihood obtained using all of its covariates. The method was tested on simulated data, and then applied to neural activity recorded from the primary motor cortex (MI) of a Felis catus subject.

Adequate management of intracranial hypertension demands continuo

Adequate management of intracranial hypertension demands continuous monitoring of intracranial pressure and cerebral perfusion pressure. Coagulation status should be assessed and bleeding diathesis should be treated prior to insertion of the intracranial pressure monitor. https://www.selleckchem.com/products/ldn193189.html Standard treatment measures such as hyperventilation and osmotic agents (e. g., mannitol, hypertonic saline) remain useful first-line interventions. Although hypertonic

saline may be preferred in patients with coexistent hyponatremia, the rate of correction of hyponatremia must be gradual to avoid the risk of osmotic demyelination. Barbiturate coma and intravenous indomethacin are available options in refractory cases. The most promising novel therapeutic alternative is the induction of moderate hypothermia (aiming for a core temperature of 32-34 degrees C). However, the safety and efficacy of therapeutic hypothermia for brain swelling caused by liver failure still needs to be proven in randomized, controlled

SN-38 solubility dmso clinical trials. Management of intracranial pressure in patients with acute liver failure should be guided by well-defined treatment protocols.”
“Sequences required for the expression of Cytc-2 (At4g10040), one of two cytochrome c genes from Arabidopsis thaliana, were characterized using plants transformed with deleted and mutagenized promoter fragments fused to gus. These studies indicated that a region containing a G-box and an ACGT motif is essential for expression. Mutation of the ACGT motif causes a complete loss of expression, while mutation of the G-box causes decreased expression in aerial parts and abolishes expression in roots and induction by environmental factors. Upstream located site II elements are required for maximal expression, mainly in reproductive tissues, and maximal induction by different factors. One-hybrid screenings allowed the identification of transcription factors from the bZIP and bHLH

families that interact mainly with the G-box. Four of these factors were able to bind to the Cytc-2 promoter in vitro and in transactivation assays in Arabidopsis. Analysis of available microarray data indicated that the bZIP transcription factors share expression characteristics with the Cytc-2 gene, suggesting CFTRinh-172 that they act as mediators of its response to tissue-specific, environmental, and metabolic conditions. Site II elements interact with a TCP family protein and may co-ordinate the expression of the Cytc-2 gene with that of other respiratory chain components. A model is proposed for the evolution of the Cytc-2 gene through the incorporation of a segment containing a G-box and an ACGT motif into an ancestral gene that contained site II elements. This may have reduced the importance of site II elements for basal expression and conferred new responses to environmental factors.


“Health effects attributable to air pollution exposure in


“Health effects attributable to air pollution exposure in Chinese population have been least understood. The authors conducted a meta-analysis on 33 time-series and case-crossover studies conducted in China to assess mortality effects of short-term exposure to particulate matter with aerodynamic diameters less than 10 and 2.5 mu m (PM10 and PM2.5), sulfur dioxide (SO2), nitrogen dioxide (NO2), ozone (O-3) and carbon monoxide (CO). Significant associations between

air pollution exposure and increased mortality risks were observed in the pooled estimates for all pollutants of interest. In specific, each 10 mu g/m(3) increase in PM2.5 was askwiated with a 0.38% (95% Confidence Interval, CI: 0.31, 0.45) increase in total mortality, a 0.51% (95% CI: 0.30, 0.73) in respiratory mortality, GNS-1480 mouse and a 0.44% (95% CI: 033, 0.54) in cardiovascular selleck chemicals llc mortality. When current annual PM2.5 levels in mega-Chinese cities to be reduced to the WHO Air Quality Guideline (AQG)

of 10 mu g/m(3), mortality attributable to short-term exposure to PM2.5 could be reduced by 2.7%, 1.7%, 2.3%, and 62% in Beijing, Shanghai, Guangzhou and Xi’an, respectively. The authors recommend future studies on the nature of air pollution concentration and health effect relationships in Chinese population to support setting stringent air quality standards to improve public health.

(C) 2013 Elsevier Ltd. All rights reserved.”
“Systemic lupus erythematosus (SLE) is an auto-immune disease that is characterised by autoantibody production. Male lupus is rare, apart from at either end of the age spectrum.

In this series, we review the histories of six male lupus patients attending our service.

Our patients presented in middle age and tended to develop haematological abnormalities, renal involvement and neurological manifestations which preceded the onset of their skin and joint complaints. Our patients accrued damage rapidly and overall did badly. They tended to respond sub-optimally to standard treatments. These cases highlight the need an increased awareness that male SLE patients present with a wide variety of symptoms, and that they accrue Selleckchem Nepicastat damage quickly. There is a need for timely diagnosis and appropriate initiation of treatment. This may help avoid preventable organ damage and increase the survival of men with SLE.”
“We present a detailed study of the luminescence at 3.42 eV usually observed in a-plane epitaxial lateral overgrowth (ELO) GaN grown by hydride vapor phase epitaxy on r-plane sapphire. This band is related to radiative recombination of excitons in a commonly encountered extended defect of a-plane GaN: I(1) basal stacking fault.