IC Samples Research Articles

Comparison of 3 Cell-Free Matrix Scaffolds Used to Treat Osteochondral Lesions in a Rabbit Model

Background: Various cell-free scaffolds are already in use for the treatment of osteochondral defects (OCDs); however, a gold standard material has not yet been defined. Purpose: This study compared the macroscopic, histological, and scanning electron microscopy (SEM) characteristics of Chondro-Gide (CG), MaioRegen (MA), and poly-d,l-lactide-co-caprolactone (PLCL) cell-free scaffolds enhanced with small-diameter microfractures (SDMs) for OCDs in a rabbit model. Study Design: Controlled laboratory study. Methods: In total, 54 knees from 27 rabbits were used in this study. Three rabbits were sacrificed at the beginning of the study to form an intact cartilage control group (group IC). An OCD model was created at the center of the trochlea, and SDMs were generated in 24 rabbits. Rabbits with OCDs were divided into 4 groups (n = 12 knees per group) according to the cell-free scaffold applied: CG (group CG), MA (group MA), PLCL (group PLCL), and a control group (group SDM). Half of the rabbits were sacrificed at 1 month after treatment, while the other half were sacrificed at 3 months after treatment. Healed cartilage was evaluated macroscopically (using International Cartilage Regeneration & Joint Preservation Society [ICRS] classification criteria) and histopathologically (using modified O’Driscoll scores and collagen staining). Additionally, cell-free scaffold morphologies were compared using SEM analysis. Results: ICRS and modified O’Driscoll classification and staining with collagen type 1 and type 2 demonstrated significant differences among groups at both 1 and 3 months after treatment (P < .05). The histological characteristics of the group IC samples were superior to those of all other groups, except group PLCL, at 3 months after treatment (P < .05). In addition, the histological properties of group PLCL samples were superior to those of group SDM samples at both 1 and 3 months after treatment in terms of the modified O’Driscoll scores and type 1 collagen staining (P < .05). Concerning type 2 collagen staining intensity, the groups were ranked from highest to lowest at 3 months after treatment as follows: group PLCL (30.3 ± 2.6) > group MA (26.6 ± 1.2) > group CG (23.3 ± 2.3) > group SDM (18.9 ± 0.9). Conclusion: OCDs treated with enhanced SDM using cell-free PLCL scaffolds had superior histopathological and microenvironmental properties, more hyaline cartilage, and more type 2 collagen compared with those treated using CG or MA scaffolds. Clinical Relevance: OCDs treated with PLCL cell-free scaffolds may have superior histopathological properties and contain more type 2 collagen than do OCDs treated with CG or MA cell-free scaffolds.

Raman Investigation of the Ice Ic–Ice Ih Transformation

Among the many ice polymorphs, ice I, that is present in nature at ambient pressure, occurs with two different structures, i.e., stable hexagonal (Ih) or metastable cubic (Ic). An accurate analysis of cubic ice Ic was missing until the recent discovery of an easy route to obtain it in a structurally pure form. Here we report a Raman spectroscopy study of the transformation of metastable ice Ic into the stable form Ih, by applying a very slow temperature ramp to the ice Ic samples initially at 150 K. The thermal behavior of the spectroscopic features originating from the lattice and OH-stretching vibrational modes was carefully measured, identifying the thermodynamic conditions of the Ic–Ih transition and the dynamics of both structures with remarkable accuracy. Moreover, the comparison of two determinations of the transformation kinetics also provides a measurement of the activation energy for this transformation process.

Multi-head enhanced self-attention network for novelty detection

One-class classification (OCC) is a classical problem in computer vision that can be described as the task of classifying outlier class samples (OC samples) from the OCC model trained on inlier class samples (IC samples) when datasets are highly biased toward one class due to the insufficient sample size of the other class. Currently, the adversarial learning OCC (ALOCC) method has been proven to significantly improve OCC performance. However, its drawbacks include instability issues and non-evident reconstruction between the IC and OC samples. Therefore, we propose multihead enhanced self-attention in the ALOCC network, thereby increasing the difference between the IC and OC samples and significantly increasing OCC accuracy compared with ALOCC accuracy. For training, we propose a new loss, called adversarial-balance loss, that effectively solves the training instability problem, further increasing OCC accuracy. The experiments show the effectiveness of the proposed method compared with state-of-art methods.

The CFETR CSMC Nb3Sn Coil Heat Treatment Process Research

The CSMC are major components of CFETR to generate the magnetic field for Simulating the Central Solenoid coil manufacturing process. The heat treatment process of Nb3Sn coil is an important process in the manufacturing process of CSMC. It is of great significance to design a reasonable heat treatment process for CSMC manufacturing. Several trials were performed to qualify and optimize the heat treatment procedure of the Central Solenoid coil. In the trials, 1) Designed the heat treatment process parameters of the coil; 2) Adjusted the heat treatment equipment and tested the process; 3) Evaluated the rationality of heat treatment process according to the Ic sample test results.Now, the heat treatment trials of Nb3Sn inner coil and outer coil have been finished. The inner coil have been described in this paper.

Whole mitochondrial genome sequencing highlights mitochondrial impact in gastric cancer

Mitochondria are organelles that perform major roles in cellular operation. Thus, alterations in mitochondrial genome (mtGenome) may lead to mitochondrial dysfunction and cellular deregulation, influencing carcinogenesis. Gastric cancer (GC) is one of the most incident and mortal types of cancer in Brazil, particularly in the Amazon region. Here, we sequenced and compared the whole mtGenome extracted from FFPE tissue samples of GC patients (tumor and internal control – IC) and cancer-free individuals (external control – EC) from this region. We found 3-fold more variants and up to 9-fold more heteroplasmic regions in tumor when compared to paired IC samples. Moreover, tumor presented more heteroplasmic variants when compared to EC, while IC and EC showed no significant difference when compared to each other. Tumor also presented substantially more variants in the following regions: MT-RNR1, MT-ND5, MT-ND4, MT-ND2, MT-DLOOP1 and MT-CO1. In addition, our haplogroup results indicate an association of Native American ancestry (particularly haplogroup C) to gastric cancer development. To the best of our knowledge, this is the first study to sequence the whole mtGenome from FFPE samples and to apply mtGenome analysis in association to GC in Brazil.

Injection Shrinkage аnd Water Sorption of Some Thermoplastic Dental Materials

Objective: To evaluate the change of diameter of different injection-molded thermoplastic materials. Material and Methods: Four thermoplastic injection-molded materials were analyzed (Bre.flex 2 nd edition, Vertex ThermoSens, Perflex Biosens and Polyan IC). A total of 432 test samples were made in the form of an hourglass. All samples were divided into three groups: Group I (Control) - consisting of 36 test samples for each type of material, that was not exposed to artificial aging or a wet environment; Group II - consisting of 36 test samples for each type of material, that were artificially aged through dehydration; Group III - specimen were subjected to artificial aging without dehydration. The diameter of each specimen was measured with a digital caliper. Data were analysed using the Student's t-test. Results: Regarding to shrinkage, the samples from the Bf Control group have a mean value of 1.56 mm and was observed a shrinkage of the injection-molded polyamide material within 0.25%. The comparison between the samples from Group II and Group III showed statistically significant differences (p 0.05). The comparison between Group II and Group III for Polyan IC samples shows that Group III has a higher arithmetic mean value (p<0.01). Conclusion: Shrinkage of the polymers during the injection process is present in all materials. The thermocycling and the storage in a dry or in a wet environment of the samples results in a change of the diameter in almost every single type of material.

ToF-SIMS and principal component analysis of lipids and amino acids from inflamed and dysplastic human colonic mucosa.

Here, time of flight secondary ion mass spectrometry (ToF-SIMS) and multivariate analysis were combined to study the role of ulcerative colitis (UC), a type of inflammatory bowel disease (IBD), in the colon cancer progression. ToF-SIMS was used to obtain mass spectra and chemical maps from the mucosal surface of human normal (NC), inflamed (IC), and dysplastic (DC) colon tissues. Chemical mapping with a lateral resolution of ≈1μm allowed to evaluate zonation of fatty acids and amino acids as well asthe morphological condition of the intestinal glands. High mass resolution ToF-SIMS spectra showed chemical differences in lipid and amino acid composition as a function of pathological state. In positive ion mode, mono- (MAG), di- (DAG), and triacylglycerol (TAG) signals were detected in NC tissues, while in IC and DC tissues, the only cholesterol was present as lipid class representative. Signals from fatty acids, collected in negative ion mode, were subjected to principal component analysis (PCA). PCA showed a strict correlation between IC and DC samples, due to an increase of stearic, arachidonic, and linoleic acid. In the same way, differences in the amino acid composition were highlighted through multivariate analysis. PCA revealed that glutamic acid, leucine/isoleucine, and valine fragments are related to IC tissues. On the other hand, tyrosine, methionine, and tryptophan peaks contributed highly to the separation of DC tissues. Finally, a classification of NC, IC, and DC patients was also achieved through hierarchical cluster analysis of amino acid fragments. In this case, human colonic inflammation showed a stronger relationship with normal than dysplastic condition. Graphical Abstract ᅟ.

Impact of reactive SiO2/Al2O3 ratio in precursor on durability of porous alkali activated materials

This study focuses on the properties of porous alkali activated materials (AAM) involving the reactive phases of the raw materials. Two types of calcined clays (illite – IC and metakaolin – WMK) and aluminium scrap recycling waste (ASRW) were considered as precursors for alkali activation. The porous AAM were obtained using ASRW with a different mass ratio in the mixture design as pore forming agent. Two types of fillers (quartz or dolomite powder) were used in AAM and evaluated. The commercial solution of sodium silicate (Na2SiO3+nH2O) modified by alkali flakes (NaOH) was used as an activating solution. The alkali activation mechanism was investigated using FTIR and XRD. Physical, mechanical and durability properties of the obtained materials were tested. The difference of physical and mechanical properties of the porous AAM was not strongly affected by the reactive SiO2/Al2O3 ratio. The density of the AAM was in the range from 550 to 675kg/m3 and the total porosity was from 70% to 80% depending on the composition. The compressive strength of the porous AAM was in a range from 1.4 to 2.0MPa (IC sample series) and from 2.0 to 3.8MPa (MWK sample series). However, the AAM with high SiO2/Al2O3 ratio (1.0–2.4 for IC sample series) have poor durability while sample series with WMK (reactive SiO2/Al2O3 ratio 0.7–0.8) show satisfactory results regarding to the sulphate resistance and can withstand up to 50 standard freeze-thaw cycles.

Impression cytology as diagnostic tool in horses with and without ocular surface disease.

Cytology plays a major role in the diagnosis of ocular surface diseases. To compare 2 cytological sampling methods for obtaining corneal and conjunctival cell samples regarding irritation for the patient, invasiveness, sample quality and diagnostic equivalence. Observational prospective study. In 5 healthy horses, conjunctival and corneal samples were taken bilaterally by impression cytology sampling (ICS) and cytobrush sampling (CBS). Irritation and invasiveness were assessed with an eye irritation and an epithelial damaging score system, respectively. Sample quality was evaluated via morphometric analysis and graded by a board certified clinical pathologist. For the assessment of diagnostic equivalence, 15 eyes of 14 client owned horses with ocular surface anomalies were sampled by ICS and CBS. The methods were compared regarding the types of inflammatory cells and/or infectious agents detected and if the correct diagnosis could be achieved. Histopathology served as gold standard when available. ICS was significantly less invasive and less irritating for the horses. Both methods retrieved cells of overall high quality; the cell quantity was significantly higher in IC samples. ICS preserved the natural cellular layout. There was a fair, but no statistically significant agreement between the diagnostic outcomes between sampling methods although CBS resulted in a slightly greater variability of inflammatory cell types compared to ICS. None. Because of its low irritability and invasiveness ICS can be recommended for cell sampling in fragile corneas and for experimental studies. ICS is especially useful in cases where preservation of cellular layout is advantageous. CBS samples are easier to obtain because of the small equine palpebral fissure. Additionally, the identification of inflammatory cells within conjunctival cell samples is easier. Overall, CBS is still an appropriate method in clinical settings.

Urothelial Functional Protein and Sensory Receptors in Patients With Interstitial Cystitis/Bladder Pain Syndrome With and Without Hunner's Lesion

To investigate the urothelium function and sensory receptors difference between interstitial cystitis/bladder pain syndrome (IC/BPS) patients with or without Hunner's lesion. Fourteen female IC/BPS patients with Hunner's lesion (Hunner IC) and 14 age-matched IC/BPS patients without Hunner's lesions (non-Hunner IC) were enrolled. Bladder mucosa biopsies were obtained. Bladder inflammation, eosinophil infiltration, and urothelial denudation were graded on a 4-point scale after staining with hematoxylin and eosin. Adhesive protein E-cadherin, tryptase, and zonula occuldens-1 in the bladder tissues were assessed with immunofluorescence staining. Urothelial muscarinic receptors M2, M3, endothelial nitric oxide synthase (eNOS), and purinergic receptor P2X3 were evaluated by Western blotting. Hunner IC patients had a significantly higher mean visual analog scale pain score and smaller cystometric bladder capacity than non-Hunner IC patients. The Hunner IC bladder specimens showed more severe or moderate eosinophilic infiltration and urothelial denudation than the non-Hunner IC bladder specimens did. The E-cadherin expression was significantly lower, and eNOS expression was significantly higher in the Hunner IC bladder samples than in the non-Hunner IC samples. The other functional proteins or sensory receptors did not differ between groups. Bladder inflammation and urothelial cell adhesion defects were more severe in the Hunner IC than that in the non-Hunner IC patients. eNOS was significantly higher in the Hunner IC than in the non-Hunner IC bladder samples, suggesting that eNOS expression difference may implicate different pathogenesis in 2 types of IC.

EVOLUÇÃO DO ESPECTRO DE LIBERAÇÃO NA MOAGEM DE ITABIRITOS EM DIFERENTES TAMANHOS E A RESPOSTA NA FLOTAÇÃO

This paper presents a mineral liberation study on two itabirite samples from the Quadrilatero Ferrifero, compact itabirite (IC) and friable itabirite (IF). The liberation spectra for quartz has been measured for both samples through QEMSCAN analysis after several degrees of comminution, aiming to compare the characteristics and evaluate the evolution of the quartz liberation spectra after fragmentation for grinding size definition. For this, particles with more than 90% of quartz have been considered free particles. The results have shown meaningful differences between the itabirites regarding liberation. IF sample, showing high level of porosity and coarser crystals, tends to show satisfactory liberation at coarser sizes (P95 at 0.210 mm). IC sample shows complex texture, with low level of porosity and finer crystals, tending to liberate at a finer size (P95 at 0.045 mm). Batch flotation tests have confirmed the grinding sizes defined by the mineralogical study, yielding concentrates showing adequate quality (SiO2 content less than 1.0%) from the ores comminuted at the above-mentioned sizes.

Evaluation of Electromigration Behaviors of Pb-Free Microbumps in Three-Dimensional Integrated Circuit Packaging

This study investigated electromigration (EM) behaviors of Pb-free microbumps in three-dimensional integrated circuit (3D IC) packaging under electrical current stressing from 1 × 104 A/cm2 to 1 × 105 A/cm2 at ambient temperature of 150°C. EM-induced fast under bump metallization consumption at the cathode of the microbumps was observed when the current density was higher than 8 × 104 A/cm2, whereas no EM-induced damage of the microbumps was found after 14,416 h when the current density was below 1.5 × 104 A/cm2. We propose that the different EM behaviors of the microbumps were mainly due to the effect of back stress. The critical microbump height to trigger EM for different current densities is discussed, and the resistance evolution of samples during current stressing was found to be correlated with the microstructure of the samples. When the resistance was stable through the whole test period, microscopic inspection of the 3D IC samples indicated that the whole microbumps were transformed to intermetallic compounds without significant EM-induced damage. However, the resistance evolution of some misaligned microbumps exhibited a feature of an early spike along with a huge resistance fluctuation during current stressing. When the resistance abruptly increased after lengthy stressing, EM-induced void formation was observed at the cathode side of the Al trace.

Design and Analysis of Harmonic Rejection Mixers With Programmable LO Frequency

A harmonic rejection mixer (HRM) with a programmable local oscillator (LO) frequency is presented. The design allows for the generation of multiple effective LO frequencies within a single HRM that are derived from a single primary clock frequency, without any modifications to the analog signal path. A 16-phase HRM with the proposed frequency synthesis technique is implemented in a 130-nm CMOS process. A clocking approach within a two-stage HRM is presented, which reduces HRM sensitivity to both gain and phase mismatch. The HRM synthesizes eight effective LO frequencies and shows an 11.9-dB gain, 11.2-dB DSB NF, and +5.4-dBm in-band IIP3 in the fundamental mode. Greater than 72-dB HR3, 71-dB HR5, and 67-dB HR7 is achieved over ten IC samples in this mode without calibration or harmonic filtering. Harmonic rejection greater than 61 dB for LO factors 2-6 and 54 dB for LO factor 7 is observed, when modifying the effective LO frequency. The HRM achieves S11 better than -10 dB over 50-830 MHz and has a total power consumption of 67 mW from a 1.2-V supply.

Comparison of thermomigration behaviors between Pb-free flip chip solder joints and microbumps in three dimensional integrated circuits: Bump height effect

Packaging technology is currently transition from flip chip technology to three dimensional integrated circuits (3D ICs) to meet the requirements of consumer electronic products. Compared to flip chip technology, the dimension of microbumps in 3D ICs is shrunk by a factor of 10. In this study, the behaviors of thermomigration in Pb-free solders of flip chip and 3D ICs are presented. When the bump height is 100 μm in the flip chip samples, the Sn protrusion was observed at the hot end and voids formation at the cold end. However, when the bump height is reduced to 5.8 μm in the 3D IC samples, no significant microstructural evolution of Sn was found; instead, the dissolution of Ni under-bump metallization at hot end was observed. We propose that discrepancy between flip chip solder joints and 3D IC microbumps is mainly attributed to the effect of back stress and the presence of thicker Ni under-bump metallization in the 3D IC packaging. Moreover, the critical temperature gradient in terms of different bump heights is discussed, showing below which there will be no net effect of thermomigration of Sn.

BANDGAP VOLTAGE REFERENCE IC FOR HV AUTOMOTIVE APPLICATIONS WITH PSEUDO-REGULATED BIAS AND SERVICE REGULATOR

The paper presents a bandgap voltage reference (BGR) implemented in TSMC 0.25 μm BCD technology for an automotive application. To withstand a car's battery large voltage variations, from 5 V to 40 V, the circuit features an embedded pseudo-regulator providing a stable bias current for the bandgap core. High-voltage (HV) MOS count has been kept low thus allowing the design of a compact BGR with an area of 0.118 mm2. The BGR has been designed to operate in automotive extended temperature range (-40°C to 150°C) and it provides a stable voltage of 1.21 V, which is also used as reference for a cascade 3.7 V linear regulator. Measurements carried on fabricated IC samples prove the effectiveness of the BGR design in terms of supported input voltage variations and operating temperature range, temperature drift, line regulation and PSRR performance.

Gold on oxide-doped alumina supports as catalysts for CO oxidation

The effect of doping a commercial alumina support with metal oxides of Ce, Co, Cu, Fe, La, Mg, Mn, Ni and Zn was investigated. Doped δ-Al2O3 samples were obtained by simple physical mixture (PM) of the alumina with the desired commercial oxide and by traditional impregnation of alumina with precursor salts of the same metals followed by calcination (IC). The metal load (7% wt.) was the same in both cases. Gold (1% wt.) was loaded using a liquid phase reductive deposition method. The obtained materials were characterized by adsorption of N2 at −196°C, temperature programmed reduction, X-ray diffraction, energy-dispersive X-ray spectrometry and transmission electron microscopy. Both samples prepared by PM and IC showed a mixture of the δ-alumina phase with the respective metal oxide, but the BET surface areas of the IC samples were, in general, higher than those of the PM materials. The particle size of the oxide phases were larger for the PM samples than for the IC materials. Nevertheless, catalytic experiments for CO oxidation showed that PM samples were much more active than IC. That could be explained by the size of gold nanoparticles, well known to be related with catalytic activity, that was lower in samples prepared by PM (7–16 nm) than by IC (11–17 nm). Gold was found to be in the metallic state. The most active samples were aluminas containing Zn and Fe prepared by PM that had the smallest gold nanoparticles sizes (7–13 and 8–12 nm, respectively) and had room temperature activities for CO conversion of 0.62 and 1.34 mol CO h−1 g Au −1 , respectively, which are larger than those found in the literature for doped γ-alumina samples.

Rapid Analysis of Perchlorate in Drinking Water at Parts per Billion Levels Using Microchip Electrophoresis

A microchip capillary electrophoresis (MCE) system has been developed for the determination of perchlorate in drinking water. The United States Environmental Protection Agency (USEPA) recently proposed a health advisory limit for perchlorate in drinking water of 15 parts per billion (ppb), a level requiring large, sophisticated instrumentation, such as ion chromatography coupled with mass spectrometry (IC-MS), for detection. An inexpensive, portable system is desired for routine online monitoring applications of perchlorate in drinking water. Here, we present an MCE method using contact conductivity detection for perchlorate determination. The method has several advantages, including reduced analysis times relative to IC, inherent portability, high selectivity, and minimal sample pretreatment. Resolution of perchlorate from more abundant ions was achieved using zwitterionic, sulfobetaine surfactants, N-hexadecyl-N,N-dimethyl-3-ammonio-1-propane sulfonate (HDAPS) and N-tetradecyl-N,N-dimethyl-3-ammonio-1-propane sulfonate (TDAPS). The system performance and the optimization of the separation chemistry, including the use of these surfactants to resolve perchlorate from other anions, are discussed in this work. The system is capable of detection limits of 3.4 +/- 1.8 ppb (n = 6) in standards and 5.6 +/- 1.7 ppb (n = 6) in drinking water.

異なる初期組成粉末を用いた Bi2212 超伝導丸線材の組織観察

Bi2212 round wires are one of candidates for application in high magnetic fields and low temperatures because of its high performance of Jc. Furthermore, round wires are suitable to make complicated coils and Rutherford cables. Bi2212 round wires are fabricated by simple heat treatment process of partial melting and slow cooling. However, the Jc values are sensitive to reaction temperatures, especially maximum reaction temperature (Tmax). In this research, we fabricated Bi2212 round wires with different compositions. We prepared four powders with the nominal compositions of between Bi=2.00 and Bi=2.25. Highest Ic value of 260 A (Jc=200 A/cm2) at 4.2 K and 10 T were obtained in Bi2.25 sample with Bi rich composition. From the observations of microstructures, we observed small amount of bridging of filaments in high Ic sample. To understand the growth mechanism of bridging, we report the results of quench experiments during heat processing.

Soil-moisture Retention Characteristics of Earth Materials in the Weathering Profile over a Porphyritic Biotite Granite

Problem statement: Three broad morphological zones and several sub-zones were differentiated within the weathering profile based on variations in earth materials and the degree of preservation of original bedrock minerals, textures and structures. Approach: The topmost Zone I (Grade 6) is some 12 m thick and comprises completely weathered bedrock materials (mainly a stiff, clayey sand) with indistinct relict bedrock textures. Results: The intermediate Zone II (Grades 3, 4 and 5) is some 30 m thick and consists of in situ, moderately to highly weathered bedrock materials (mostly friable, gravelly silty sands and coreboulders) that indistinctly to distinctly preserve the original bedrock minerals, textures and structures; the degree of preservation increasing with depth. The bottom Zone III (Grade 2) consists of continuous bedrock with effects of weathering only along and between structural discontinuity planes; the earth materials of zones I and II thus representing the residual soil over bedrock. Constant volume samples show a general increase in porosity, silt and clay fractions up the weathering profile, but a corresponding decrease in the sand and gravel fractions with sub-zone IC having the highest density and lowest porosity. Soil-moisture retention curves, determined with the pressure plate method, show increasing suctions from 0-4.19 pF (0 to -1,500 kPa) with decreasing moisture contents of 35-18% for sub-zone IC samples, 32-7% for sub-zone IIB samples and some 25-4% for sub-zone IID samples. Conclusion/Recommendations: These soil-moisture retention variations reflect textural differences and point to the inherent role of suction in the unsaturated earth materials. Differences in the volumes of calculated drainage and storage pores indicate that the earth materials of sub-zone IC will have the lowest rates of infiltration and percolation, whilst those of sub- zone IID will have the fastest rates and those from sub-zone IIB, intermediate rates.

Effect of dry-air chilling on sensory descriptive profiles of cooked broiler breast meat deboned four hours after the initiation of chilling

The objective of this study was to evaluate the effect of a dry air-chilling (AC) method on sensory texture and flavor descriptive profiles of broiler pectoralis major (fillet) and pectoralis minor (tender). The profiles of the muscles immersion-chilled and deboned at the same postmortem time and the profiles of the muscles hot-boned (or no chill) were used for the comparison. A total of 108 eviscerated carcasses (6-wk-old broilers) were obtained from a commercial processing line before the chillers. Carcasses were transported to a laboratory facility where they were either i) chilled by a dry AC method (0.7 degrees C, 150 min in a cold room), ii) chilled by immersion chilling (IC; 0.3 degrees C, 50 min in a chiller), or iii) not chilled (9 birds per treatment per replication). Both IC and AC fillets and tenders were removed from the bone at 4 h after the initiation of chilling (approximately 4.75 h postmortem) in a processing area (18 degrees C). The no-chill muscles were removed immediately upon arrival. The sensory properties (21 attributes) of cooked broiler breast meat were evaluated by trained panelists using 0- to 15-point universal intensity scales. The average intensity scores of the 9 flavor attributes analyzed ranged from 0.9 to 4.0. Regardless of breast muscle type, there were no significant differences in sensory flavor descriptive profiles between the 3 treatments. The average intensity scores of the 12 texture attributes ranged from 1.5 to 7.5 and there were no significant differences between the AC and IC samples. The average intensity scores of the texture attributes, cohesiveness, hardness, cohesiveness of mass, rate of breakdown, and chewiness of the no chill fillets and tenders were significantly higher than those of either of the chilled samples. These results demonstrate that chicken breast meat from AC retains sensory flavor profile characteristics but AC results in sensory texture profile differences when compared with no-chill meat. Sensory flavor and texture profiles of AC broiler breast meat do not differ from those of IC samples when the muscles are deboned at the same time after the initiation of chilling.