Only a high CD133 staining (p = 0.002; C.I. 1.365-4.171; RR = 2.4) and lymph node involvement (p = 0.001; mTOR inhibitor CI = 1.532-5.876; RR = 3.0) confirmed to be independent predictors of shorter disease-free survival (Table 4). It is noteworthy that α-DG confirmed to be an independent prognostic indicator when CD133 was not included in the model (p = 0.024; C.I. 1.086-3.144; RR = 1.8),

a result expected given the correlation between the two parameters. Table 4 Contribution of various potential prognostic factors to disease free survival by Cox regression analysis in colon cancer patients   Hazard 95% confidence   Variable ratio interval p value Tumor grade* 1.438 0.801-2.583 0.223 pT parameter# 2.027 0.806-5.094 0.133 Node status** 3.000 1.532-5.876 0.001 CD133§ 2.386 1.365-4.171 0.002 Dystroglycan§§ 1.629 0.950-2.794 0.076 The risk

ratio is given as: * higher (G3) versus lower grade (G1/2); # higher (pT3/4) BMS 907351 versus lower (pT1/2) pT parameter; ** node-positive vs node-negative; § positive vs negative and §§ negative vs positive. A similar Cox regression model including also the age confirmed the independent prognostic significance of only CD133 staining (p = 0.003; C.I. 1.332-4.114; RR = 2.3) and lymph node involvement (p = 0.001; CI = 1.546-5.911; RR = 3.0) also in term of overall survival (Table 5). α-DG staining did not display an independent prognostic significance also when CD133 was not included in the model (p = 0.051; C.I. 0.997-2.902; RR = 1.7). Table 5 Contribution of various potential prognostic factors to overall survival by Cox regression analysis in

colon cancer patients   Hazard 95% confidence   Variable ratio interval p value Age° 1.431 0.842-2.432 0.185 Tumor grade* 1.380 0.767-2.484 0.282 pT parameter# 1.850 0.744-4.599 0.185 Node status** 3.023 1.546-5.911 0.001 CD133§ 2.341 1.332-4.114 0.003 Dystroglycan§§ 1.462 0.845-2.532 0.175 The risk ratio is given as: ° older (>68 y) versus younger patients; * higher (G3) versus lower grade (G1/2); # higher (pT3/4) versus lower (pT1/2) pT parameter; ** node-positive vs node-negative; Chlormezanone § positive vs negative and §§ negative vs positive. Discussion In this study, the expression of the surface markers CD133 and α-DG was evaluated in a subset of colon cancers and their potential prognostic significance was investigated. We and others previously reported that loss of the α subunit of the DG complex (α-DG) is a frequent event in human cancers [6, 8, 10, 12, 14–16]. We also demonstrated, by western blot analysis, that α-DG is frequently reduced in colon cancer tissues compared to normal adjacent normal tissues while the β subunit did not display significant variations between normal and tumour tissues [12].

Menopause and age-related

reduction selleck compound of estrogen levels in women may also impact muscle strength because estrogen is converted to testosterone, which has an anabolic effect on muscle protein synthesis. Further, both sex hormones may suppress inflammatory cytokines that exert catabolic effects on muscle. Thus, hormone replacement has always received considerable interest as a therapy for sarcopenia. In women, trials of estrogen and testosterone therapy have failed to yield any meaningful increases of muscle strength [96]. Studies of testosterone replacement therapy in men has had mixed results, depending on age of the subjects. Several studies have shown that administration of testosterone in hypogonadal younger men produced significant increases in lean body mass and muscle strength [97–99]. Strength increases ranged from 20% to 60% but tended to be smaller than the increases produced by resistive exercise training. https://www.selleckchem.com/products/z-vad-fmk.html Anabolic effects of testosterone therapy on older hypogonadal men tend to be weaker,

with most studies reporting minimal changes in body composition and no increases in muscle strength [96]. However, some studies have reported moderate strength improvements ranging from 10% to 25%, but unlike the negative results, all of these trials lacked control groups. However, it should be noted that testosterone is administered to older men in much lower doses than to younger men because of increased risk of prostate cancer and other side effects [96]. Considerable interest has also been devoted to testing the effect of GH on sarcopenia. Growth hormone exerts an indirect anabolic effect on muscle by stimulating production of IGF-1 in the liver. Levels of growth hormone are systematically lower in the elderly, and thus it was hypothesized that GH would be effective in combating muscle loss in elderly subjects. However, most studies Ureohydrolase have shown

that GH treatment is ineffective in the elderly, both from the standpoint of muscle mass and muscle strength. The failure of GH treatment to augment muscle strength in elderly subjects has led to other approaches, such as treatment with growth-hormone-releasing hormone, which was found to increase GH production and produce moderate increases in muscle strength [96–100]. Additionally, others have tried direct administration of IGF-1. By complexing IGF-1 to its primary circulating binding protein IGFBP-3, it is possible to significantly increase the IGF-1 dose while eliminating the side effect of hypoglycemia that occurs with IGF-1 alone [101]. Boonen et al.

“
“Background Prevotella intermedia,

a gram-negative, black-pigmented anaerobic rod, is frequently isolated from periodontal pockets of patients with chronic periodontitis [1], acute necrotizing ulcerative gingivitis [2], pregnancy gingivitis [3], and endodontic lesions [4–6]. This organism possesses a number of virulent factors that underlie it’s pathogenic potential for causing infections [7–11]. P. intermedia strain 17 was initially isolated from a chronic periodontitis lesion in our laboratory [12] and some of its phenotypic characteristics were determined. Among these included the ability of the organism to: (a) produce viscous materials in vitro [12]; (b) invade human oral epithelial cells [13]; and (c) stimulate CD4+ T cells expressing Vβ8, Vβ12 and Vβ17 [14]. More recently, the whole genome sequence of strain JNK signaling inhibitors 17 was determined by The Institute for Genomic Research (TIGR; Rockville, MD, USA) [15]. In our earlier study, we demonstrated that a clinical isolate of Prevotella nigrescens is able to produce extracellular viscous material that might contribute to its biofilm formation [16]. In this context, we hypothesized

that the ability of P. intermedia strain 17 to produce viscous MK-1775 chemical structure materials might be essential for its biofilm formation. In this study, we describe the chemical composition of the viscous materials as determined by means of high performance liquid chromatography (HPLC) and colorimetry. To define the role of the extracellular viscous materials in biofilm formation, we identified and obtained a naturally-occurring variant strain that lacked the ability to produce viscous materials in vitro from our stock culture collections of strain 17, designated

as 17-2. We compared the ability of these two strains (strains Liothyronine Sodium 17 versus 17-2) in their ability to form biofilms and to induce abscess formation in mice as an indication of their pathogeniCity. Further, we sought to determine the gene expression profiles associated with the biofilm formation by these two strains using microarray assays. Results Viscosity of spent culture medium Stock cultures of P. intermedia strain 17 were transferred to enriched-trypticase soy broth (enriched-TSB) and grown for 48 h. The viscosities of spent culture media were measured by a rotary viscometer. All tested P. intermedia strain 17 stocks, with the exception of one particular stock strain, designated as strain 17-2, produced materials in vitro that were highly viscous as compared to the control TSB medium.

T cells generated by DC transfected with GPC-3 mRNA are functional in vitro GPC-3 mRNA transfected DC but not mock transfected DC induced

proliferation of autologous T cells (Figure 2a), indicating that T cells reacting to GPC-3 epitopes are represented in the peripheral T cell repertoire. ELISPOT assay for interferon-gamma production found that DC expressing GPC-3 generated significantly more T cells producing interferon-gamma than mock transfected DC (53 ± 15 versus 4 ± 3 spots per well, respectively; p < 0.01) (Figure 2b). BIBW2992 price These data demonstrate that monocyte-derived DC transfected with GPC-3 mRNA and matured with LPS were able to process and present GPC-3 derived epitopes, resulting in the proliferation of autologous T cells, which were functional as assessed by interferon-gamma production. Figure 2 T cells generated by DC transfected with GPC-3 mRNA are functional in vitro. PBMC were depleted of HLA class II positive cells and co-cultured with autologous, γ-irradiated, LPS matured DC in serum-free X-Vivo medium supplemented on days 1, 3 and 7 of culture with IL-2 (20 U/ml) and IL-7 (10 ng/ml). After 7 days, T cells were re-stimulated with the same DC for a further 5 days. a. T cell proliferation (1 × 105/well) was measured by

3H-thymidine incorporation, T cells Ensartinib price were cultured alone, with DC (1 × 104/well) transfected with 20 μg GPC-3 mRNA, or mock transfected DC. b. ELISPOT assay for interferon-γ production was performed on T cells (1 × 105/well) stimulated by DC transfected with 20 μg GPC-3 mRNA or mock transfected DC. Assessment of binding affinity of GPC-3 peptides to HLA-A2 Among the 6 GPC-3

peptides tested, peptides 1, 2, 4 and 5 (GPC-3 229-237, 522-530, 186-194 and 222-230, respectively) showed significant binding affinities, whereas peptides 3 and 6 (GPC-3 299-307 and 169-177, respectively) did not show significant binding under the conditions used in these experiments (Figure 3). However, none of the GPC-3 peptides exhibited very strong binding to HLA-A2, as all demonstrated weaker binding than the “”immunodominant”" AFP peptide (GVALQTMKQ). Figure 3 Binding affinity of GPC-3 peptides check details to HLA-A2. T2 cells were plated into 96-well U-bottomed plates at 1 × 105 cells per well in 200 μL X-Vivo (Biowhittaker) and cultured overnight at 18°C to increase cell surface HLA-A2 expression. a. 3 hours after pulsing with increasing concentration of GPC-3 peptides, positive control (AFP) peptide or negative control (random) peptide plus 5 nM β2 microglobulin and incubation at 37°C, T2 cells were stained with a FITC-conjugated HLA-A2 specific antibody and examined by flow cytometry; b. T2 cells were stained with a FITC-conjugated HLA-A2 specific antibody and examined by flow cytometry at time points after the cells had been incubated for 3 hours at 37°C with 100 μM peptide, 5 nM β2 microglobulin and 5 μg/ml Brefeldin A. The data shown are representative of three independent experiments.

Gene

1989,77(1):61–68.PubMedCrossRef 55. Beaber JW, Hochhut B, Waldor MK: SOS response promotes horizontal dissemination of antibiotic resistance genes. Nature 2004,427(6969):72–74.PubMedCrossRef 56. Guerin E, Cambray G, Sanchez-Alberola N, Campoy S, Erill I, Da Re S, Gonzalez-Zorn B, Barbe J, Ploy MC, Mazel D: The SOS response controls integron recombination. Science 2009,324(5930):1034.PubMedCrossRef 57. Heidelberg JF, Eisen JA, Nelson WC, Clayton RA, Gwinn ML, Dodson RJ, Haft DH, Hickey EK, Peterson JD, Umayam L, et al.: DNA sequence of both chromosomes of the Ferroptosis inhibitor cholera pathogen Vibrio cholerae. Nature 2000,406(6795):477–483.PubMedCrossRef 58. O’Shea YA, Finnan S, Reen FJ, Morrissey JP, O’Gara F, Boyd EF: The Vibrio seventh pandemic island-II is a 26.9 kb genomic island present in Vibrio cholerae El Tor and O139 serogroup isolates that shows homology to a 43.4 kb genomic island in V. vulnificus. Microbiology 2004,150(Pt 12):4053–4063.PubMedCrossRef

selleck kinase inhibitor 59. Philippe N, Alcaraz JP, Coursange E, Geiselmann J, Schneider D: Improvement of pCVD442, a suicide plasmid for gene allele exchange in bacteria. Plasmid 2004,51(3):246–255.PubMedCrossRef 60. Guzman LM, Belin D, Carson MJ, Beckwith J: Tight regulation, modulation, and high-level expression by vectors containing the arabinose PBAD promoter. J Bacteriol 1995,177(14):4121–4130.PubMed Authors’ contributions EFB designed the research; SA-M and MGN performed the research; SA-M, MGN and EFB analyzed data; SA-M, MGN and EFB wrote the paper.”
“Background Burkholderia pseudomallei is an environmental Dipeptidyl peptidase Gram-negative bacterium that causes a severe and often fatal disease called melioidosis. This is an important cause of sepsis in south-east Asia and northern Australia, a geographic distribution that mirrors the presence of B. pseudomallei in the environment [1]. Melioidosis may develop following bacterial inoculation or inhalation

and occurs most often in people with regular contact with contaminated soil and water [1]. Clinical manifestations of melioidosis are highly variable and range from fulminant septicemia to mild localized infection. The overall mortality rate is 40% in northeast Thailand (rising to 90% in patients with severe sepsis) and 20% in northern Australia [1, 2]. A major feature of melioidosis is that bacterial eradication is difficult to achieve. Fever clearance time is often prolonged (median 8 days), antimicrobial therapy is required for 12-20 weeks, and relapse occurs in around 10% of patients despite an appropriate course of antimicrobial therapy [3, 4]. The basis for persistence in the infected human host is unknown, although several observations made to date may be relevant to the clinical behaviour of this organism [2, 5]. B. pseudomallei can resist the action of bactericidal substances including complement and antimicrobial peptides in human serum [6–8]. B. pseudomallei can also survive after uptake by a range of phagocytic and non-phagocytic cells.

Rac and RhoA have a reciprocal relationship, and Rac activity remains unchecked with the inactivation of RhoA [47]. This is one likely explanation for the distinct appearance of lamellopodia on dormant cells (Figs. 1a, 3b, 4a, 5a, 6b, 8a, 9a). However, without the ability to form stress fibers, the characteristic motility due to Rac activation does not occur [48]. The role of PI3K in GRAF activation is also novel. We demonstrated that the survival of these dormant cells depends, in part, on activation of the

PI3K pathway. The data presented here demonstrate that parallel signaling induced by exogenous FGF-2 through PI3K and by integrin α5β1 is necessary for activation of this GAP. The levels of GRAF were not affected in dormant cells as demonstrated by western blot (data not shown). However, Dasatinib order its membrane localization depended on both exogenous FGF-2 through PI3K and binding of integrin α5β1. The mechanism is not understood and will be studied in follow up investigations. However, an association with FAK

has been demonstrated. Whether this association is direct or through elements of the well recognized large complex is yet to be determined and will be investigated. PIK3CA, the gene coding for Staurosporine chemical structure the catalytic subunit of PI3K, is mutated in 18–40% of breast cancers [49]. The mutations are in “hotspots” in exons 9, corresponding to the acetylcholine helical domain and exon 20, corresponding to the kinase domain in 85–100% of cases [50, 51]. While the importance of the PI3K pathway in mammary tumorigenesis has been extensively investigated, opposing conclusions regarding mutations in the PIK3CA gene in primary breast tumors have been reached by different groups [50, 52]. A potential explanation for the conflicting reports came to

light more recently when a more focused analysis reported that mutations in exon 9 are associated with a significantly worse prognosis for disease-free and overall survival while mutations in exon 20 are associated with prolonged survival [51]. Also, while a mutation in Akt 1 has finally been identified in a number of malignancies, including breast cancer [53], the role of Akt activation in initiating malignant transformation is yet to be clarified [54]. With respect to breast cancer dormancy, the significance of frequent mutations in the PI3K pathway is not at all understood. It is possible that activating mutations may render cells resistant to therapy and permit survival of metastatic cells in the bone marrow niche. We have previously shown that the activated PI3K pathway is necessary for survival of this dormancy model [3] but induction of the dormant, non-proliferative state depends on FGF-2-initiated signals that activate a variety of pathways in addition to PI3K.

He presented with a fever, had decreased breath sounds on the right side, and his vital signs were stable (pulse was 100, blood pressure was 140/90 mmHg. Physical examination revealed a single skin laceration (2.0 cm) with surrounding contusion at the right mid-axillary line; 4th intercostal space. The admission chest radiograph revealed a small right pneumothorax, pulmonary contusion and radiopaque material within the right middle lobe (Figure 1). A right-sided thoracostomy tube drained

minimal air and blood. A computed tomography (CT) scan of the chest demonstrated a foreign body in the right hemithorax with the form of an AM-403/P attenuated energy projectile (Figure 2). Due to septic complications and the size of the foreign body, the patient underwent a right thoracotomy which revealed CHIR99021 a 19 g (6.5 × 2.5 cm) Bortezomib projectile within

the middle lobe, which was surrounded by an intra-parenchymal hematoma (Figure 3). The projectile and injured parenchyma were removed by wedge resection. The patient had an uneventful hospital stay and was discharged home 5 days later. Figure 1 Admission chest radiography. Admission chest radiograph shows a radiopaque image within a pulmonary contusion (arrow), and a small pneumothorax on the right hemithorax. Figure 2 Admission CT scan of the chest. CT three-dimensional (3D) image reconstruction of the chest shows an intra-thoracic attenuated energy projectile and a chest thoracostomy tube inside the right hemithorax. Figure 3 Intra-operative

finding. Intra-operative photograph depicts the AM-403/P attenuated energy projectile within the lung parenchyma during wedge resection. Discussion “”Less-lethal”" weapons acetylcholine are explicitly designed and primarily employed to incapacitate personnel, while minimizing fatalities [4]. There are many classes of “”less lethal weapons”" including conducted electrical weapons (commonly referred to as a TASER), chemical irritants (Pepper spray), and impact munitions. Impact munitions include “”bean bag rounds”", rubber bullets, plastic baton rounds, and attenuated energy projectile. As our case is an example of a serious injury caused by a rubber bullet, we focused our literature review on chest injuries caused by rubber and plastic “”less lethal”" munitions from 1972 to 2008 (Table 1). Table 1 Articles published in the English language pertaining to thoracic injuries caused by rubber and plastic “”less-lethal”" impact munitions (1972–2009) Author/Year Bullet Type/Speed/ Energy Range (m) Total Cases/Chest Intra-thoracic Penetration Significant thoracic injuries Outcome Shaw J. 1972 Rubber 150 g/ 116.5 m/s/* 27.4 3^ No Lung contusion (3) All survived Millar R. 1975 Rubber 140 g/73 m/s/* * 90/18 No Lung contusion(5), pneumothorax(1), rib fracture(2) All survived Sheridan S. 1983 Plastic 135 g/*/* * 147/21 * * * Rocke L. 1983 Plastic/*/* * 99/10 No Lung contusion(7), rib fracture(1) All survived Ritchie A. 1990;1992 Plastic 134.5 g/69.

The ability to maintain reaction performance following fatigue may have been due to the combined effect of choline,

phosphatidylserine and the energy matrix. Although this is the first investigation to examine this combination of ingredients following exhaustive anaerobic exercise, previous studies have shown that this combination of ingredients to be effective in augmenting exercise click here [35] and cognitive [36] performance in rodents. Although the mechanism of action has not been fully elucidated, it has been suggested that this combination of ingredients may contribute to an enhanced neuroprotective effect via a stronger defense of membrane integrity [36]. Glycerophosphocholine and phosphatidylserine have been shown to form membrane phospholipids [37], and acetyl-L-carnitine may provide neuroprotective effects by buffering oxidative stress and maintaining energy supply to neurons [38]. Imatinib purchase The concentrations of ingredients used in CRAM appear to have been sufficient to maintain performance during T1; however, did not appear to provide the same effect at T2. This may have been due to habituation in that the daily concentration of ingredients

ingested may not have provided the same physiological effect following 4 weeks of supplementation. Another potential explanation is that the weekly familiarization sessions that continued throughout the experimental period may have provided a training effect thereby making it more difficult for CRAM to affect performance at the same concentrations. However, the use of weekly familiarization sessions was critical to our study design to limit potential detraining

effects. Thus, future research should address the role of chronic CRAM supplementation on acute exercise performance. Despite the habituation effect observed for reaction time and subjective feelings of alertness, subjects’ subjective feelings of focus in CRAM was maintained following the bout of high intensity Molecular motor exercise while subjects in PL experienced a significant decline. In conclusion, the results of this study indicate that acute ingestion of CRAM can prevent the exercise-induced decline of reaction time, and subjective feelings of focus and alertness in healthy college students following exhaustive exercise. However, some habituation may occur following 4-weeks of supplementation. Future investigations appear warranted to provide further insight on the efficacy of long-term supplementation of CRAM. Acknowledgements The authors would like to thank Chemi Nutra, Inc. (White Bear Lake, MN) for providing financial support of this study and MRM (Oceanside, CA) for providing the study material. References 1. Jäger R, Purpura M, Kingsley M: Phospholipids and sports performance. J Int Soc Sports Nutr 2007, 4:5.CrossRefPubMed 2.

) Swingle (Simaroubaceae), Kalopanax septemlobus (Thunb.) Koidz (Araliaceae), and Pinus massoniana Lamb. (Pinaceae) in warm temperate evergreen broadleaved forests in Zhangjiajie National Forest Park in 1999, Badagongshan National Nature Reserve in 1999 and 2000, Daweishan National Forest Park in 2000, and Shunhuangshan National Forest Park in 2001 of Hunan Province drug discovery in south-central China. For more information on the study area, see Koponen et al. (2000, 2004). The fossils with proliferating ascocarps (Fig. 7) are preserved attached to wood debris in a 17 × 13 × 5 mm piece of Bitterfeld amber from the Heinrich Grabenhorst collection (collection number Li-83) that is now housed in the Geoscientific

Collections of the Georg August University Göttingen (collection number GZG.BST.27285). Bitterfeld amber originates NVP-BGJ398 manufacturer from the Goitzsche mine near the city of Bitterfeld (central Germany) and was recovered from the “Bernsteinschluff” Horizon in the upper part of the Cottbus Formation. The Upper Oligocene amber-bearing sediment has an absolute age of 25.3–23.8 Ma (Blumenstengel 2004; Knuth et al. 2002). A previous notion that Bitterfeld amber either represents re-deposited Eocene Baltic amber, or is at least much older than the amber-bearing strata (Weitschat 1997) was disproven by recent reconstructions of the sedimentary environment of this huge amber deposit (see Standke 2008, and discussion

in Schmidt and Dörfelt 2007, and Dunlop 2010). The non-proliferating fossil ascocarps (Figs. 8 and 9) are enclosed in a 2.5 × 1.5 × 1 cm piece of Baltic amber from the Jörg Wunderlich collection (collection number F1178/BB/FUN/CJW) that is now housed in the Geoscientific Collections of the Georg August University Göttingen (collection number GZG.BST.27286). Four immature and six mature ascomata derive from a mycelium that directly grew on the surface of a stalactite-like resin piece which served as substrate for the resinicolous fungus. These were preserved by a subsequent resin flow that had then covered over the material. The Eocene sediments containing the majority of Baltic amber in the Kaliningrad area (Russia) are 35–47 Ma old (Standke

1998). Microscopy, imaging and microanalysis Vildagliptin Morphological features of the extant fungal specimens were observed and measured in water under a light microscope (Leica DMLS) with a 100x oil-immersion objective. Potassium-hydroxide (KOH), Lugol’s reagent (IKI), Melzer’s reagent (MLZ), Congo Red (CR; CR + congophilous, coloring strongly red in CR), and nitric acid (N) were used when observing some diagnostic structures, like paraphyses and stipe hyphae. Ascomata from dried Cunninghamia bark pieces were imaged under a Carl Zeiss AxioScope A1 compound microscope using simultaneously incident and transmitted light. Spores were imaged on a microscope slide in water using 1600× (oil immersion) magnification and Differential Interference Contrast (DIC) illumination.

44 km/s and 0.56, respectively. For the fabrication of PS multilayers, we consider the inclusion of ‘etch stops’ or ‘etch breaks’ where the current is interrupted to stop the etching of the Si wafer in order to prevent any depletion of HF [37]. The introduction Lenvatinib in vivo of these etching breaks is necessary to obtain layers with constant porosity with depth [38]. Because our samples include very thick layers, with large mismatch porosities between them, the number and length of the etch breaks are important to obtain homogeneous structures. We found that etch breaks of 4 s with a ratio (etch break time)/(etching time) from 3.3 for low porosities

(52 %) to 7.3 for high porosities (67 %) are enough to minimize any chirp in the layers. Results and discussion Thicknesses of layers were measured by optical microscopy, and the layer porosities were determined from optical Metformin reflectance spectra by fitting our experimental measurements and comparing them with our theoretical simulations for each sample. The acoustic transmission and field intensity distribution have been modeled using the transfer matrix method

described before and taking into account the effect of the sample (PS-Si substrate), transducers (Si pillars), and In-Ga eutectic liquid used to couple the transducers to the sample. Three PS multilayer samples are considered here to show the effect of localization inside the structures. All of them consist of layers a and b repeating alternatively, and a defect layer, c, in the middle of the structure. The sequence used for structures was a b a b a b a b a b a b−c−b a b a b a b a b a b a=(a b)6 c(b a)6. In the first sample (1) porosities and thicknesses of layers a and b are P a =53%, d a =1.15 μm, P b =67%, and d b =1.10 μm, respectively. Here, layer c has the same thickness and porosity of layer a, and therefore, this sample is completely

periodic. The porosities and thicknesses of the layers were chosen to obtain the fundamental stop band within the bandwidth of the acoustic transducers, and satisfying Equation 7. A scheme of structure 1 is displayed in the top panel of Figure 1. The central panel of Figure 1 (solid line) shows the measured acoustic transmission spectrum of the PS periodic structure with a total thickness of approximately 27 μm. The Carnitine dehydrogenase band gap in the transmission spectrum observed around 1.15 GHz and ranged from 0.94 to 1.38 GHz is the first-order acoustic stop band of the mirror, corresponding to m=1 in Equation 7. This fundamental stop band shows an attenuation of approximately 50 dB with a fractional bandwidth of 37 %. The dashed line is the result of calculations using TMM. Good agreement between modeled and measured spectra is seen. The fine features of the spectrum are not noise but the longitudinal modes of the Si pillars of the transducers and the Si substrate of the sample. The fundamental band gap has a depth of approximately 50 dB which is less than the modeled value of approximately 100 dB.