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Artigos de revistas sobre o tema "PET"

Autor: Grafiati

Publicado: 4 de junho de 2021

Última modificação: 26 de abril de 2025

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1

Park, Eun-Soo. "Morphology, mechanical, and dielectric breakdown properties of PBT/PET/TPE, PBT/PET/PA66, PBT/PET/LMPE, and PBT/PET/TiO2blends". Polymer Composites 29, n.º 10 (outubro de 2008): 1111–18. http://dx.doi.org/10.1002/pc.20626.

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2

Aliberti, Francesca, Maria Oliviero, Raffaele Longo, Liberata Guadagno e Andrea Sorrentino. "Effect of Crystallinity on the Printability of Poly(ethylene Terephthalate)/Poly(butylene Terephthalate) Blends". Polymers 17, n.º 2 (9 de janeiro de 2025): 156. https://doi.org/10.3390/polym17020156.

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This study explores the impact of blending polyethylene terephthalate (PET) with polybutylene terephthalate (PBT) on the thermal, structural, and mechanical properties of 3D-printed materials. Comprehensive analyses, including Fourier-transform infrared spectroscopy (FT-IR), thermogravimetric analysis (TGA), X-ray diffraction (XRD), differential scanning calorimetry (DSC), and mechanical testing, were conducted to assess the influence of blend composition. FT-IR confirmed that PET and PBT blend physically without transesterification, while TGA showed enhanced thermal stability with increasing PET content. XRD revealed that PET and PBT crystallize separately, with the crystallinity decreasing sharply for blends with more than 50% PET. The DSC results indicated that PET effectively slows down the crystallization kinetics of PBT, promoting cold crystallization. Mechanical tests demonstrated that the elastic modulus remains relatively unchanged, but the strain at break decreases with a higher PET content, indicating increased stiffness and reduced ductility. Overall, incorporating PET into PBT improves 3D-printability and dimensional stability, reducing warpage and enhancing print precision, making these blends advantageous for 3D-printing applications.

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3

Wang, Rui-yuan, Xiao-dong Chen, Qun-jie Xu, Yin-jie Wang e Qiang Zhang. "Study on crystallization performance of polyethylene terephthalate/polybutylene terephthalate alloys". Journal of Polymer Engineering 34, n.º 8 (1 de outubro de 2014): 747–54. http://dx.doi.org/10.1515/polyeng-2014-0106.

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Abstract Polyethylene terephthalate (PET) is a kind of high performance engineering plastic. However, the application of pure PET is subject to limitation because of its slow crystallization rate. In order to overcome this difficulty, thermoplastic resins are often added into PET matrix by a compounding technique. Polybutylene terephthalate (PBT) possesses many advantages such as a high degree of crystallinity and rapid molding, thus, is very suitable to adjust the crystallization behaviors of PET. In this work, the crystallization behaviors of PET/PBT alloys were studied by a differential scanning calorimeter (DSC) and thermal platform polarizing microscope. The obtained results indicate that the content of PBT could tune the melting and crystallization behaviors of the alloy. The parameters of non-isothermal crystallization of the alloys for blends were analyzed by the Jeziorny and Kissinger methods. The non-isothermal crystallization process for PET, PBT and PET/PBT alloys fit the Jeziorny model well at the early stage, but there is a certain small deviation at the later stage, indicating that the nucleation mechanism of PET/PBT alloy is complicated. In addition, the crystallization rate accelerates with an increase in cooling rate. The alloys show the best crystallization performance when the content of PBT is 10 wt%, and their crystallization activation energy reaches up to -201.78 kJ/mol.

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4

Shirakawa, Sachiyo, Ippei Matsumoto, Kazuki Terashima, Makoto Shinzeki, Sadaki Asari, Tadahiro Goto, Hideyo Mukubo et al. "Usefulness of FDG-PET in the evaluation of tumor response to proton beam therapy for locally advanced pancreatic ductal adenocarcinoma." Journal of Clinical Oncology 31, n.º 4_suppl (1 de fevereiro de 2013): 271. http://dx.doi.org/10.1200/jco.2013.31.4_suppl.271.

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271 Background: Evaluation of tumor response to radiation therapy in pancreatic ductal adenocarcinoma (PDA) using conventional radiological tests is difficult due to generally small size and inflammatory or fibrotic changes of radiated tissue. Although increasing evidence has shown that 18-F-fluorodeoxyglucose-positoron emission tomography (FDG-PET) can assess functional changes in various tumors, available data in PDA with radiation therapy is scarce. In this study, we investigated the role of FDG-PET in long-term monitoring tumor response to proton beam therapy (PBT) for PDA. Methods: Thirty-four locally advanced PDA patients with pre- and post-PBT FDG-PET data were included in this study. Local tumor responses by computed tomography (CT) and FDG-PET were defined as below: response group in CT (complete response: CR, partial response: PR, stable disease: SD, progressive disease: PD) was defined according to Response Evaluation Criteria in Solid Tumors, but only evaluation of primary tumor; and in FDG-PET, CR was defined as disappearance of FDG uptake, PR as decrease, SD as unchange, and PD as increase, compared to pre-PBT data. We evaluated tumor response at three different time points: 0-3, 3-6, and 6-12 months after PBT. Also serum CA19-9 values were evaluated. Results: Radiation doses were 50.4-70.2 GyE and 28 (82%) patients received concomitant chemotherapy. During the follow-up period (median 19 months), a total of 90 FDG-PET tests were performed. At the first time point, SD was noted in 90% (9/10) of patients by CT, whereas CR or PR in all by FDG-PET. At the second point, 39% (7/18) of patients demonstrated PR by CT, whereas 91% CR or PR by FDG-PET. Two patients with PD by FDG-PET were diagnosed as SD by CT, while one patient with PD by CT was diagnosed as PR by FDG-PET. At the third point, four patients with PD by FDG-PET were diagnosed as PR or SD by CT. Serum CA19-9 values supported FDG-PET findings. In four of 14 patients with serial FDG-PET, the maximum effects were noted at the second point. Conclusions: Serial FDG-PET can detect changes in local tumor response to PBT for PDA earlier and more sensitively than CT. Of note, there is the risk for false positive in early post-PBT FDG-PET.

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5

IDA, Shin-ichiro, Hiroko YAMAMOTO, Mai TERUNUMA e Masayoshi ITO. "Effects of Transesterification on the Homogenization of PET/PEN/PET-PEN Copolymer Blends". KOBUNSHI RONBUNSHU 66, n.º 2 (2009): 55–60. http://dx.doi.org/10.1295/koron.66.55.

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6

Alhamidi, Abdullah, Arfat Anis, Saeed M. Al-Zahrani, Zahir Bashir e Maher M. Alrashed. "Conductive Plastics from Al Platelets in a PBT-PET Polyester Blend Having Co-Continuous Morphology". Polymers 14, n.º 6 (9 de março de 2022): 1092. http://dx.doi.org/10.3390/polym14061092.

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Conductive plastics are made by placing conductive fillers in polymer matrices. It is known that a conductive filler in a binary polymer blend with a co-continuous morphology is more effective than in a single polymer, because it aids the formation of a ‘segregated conductive network’. We embedded a relatively low-cost conductive filler, aluminium nano platelets, in a 60/40 PBT/PET polymer blend. While 25 vol.% of the Al nanoplatelets when placed in a single polymer (PET) gave a material with the resistivity of an insulator (1014 Ωcm), the same Al nano platelets in the 60/40 PBT/PET blend reduced the resistivity to 7.2 × 107 Ωcm, which is in the category of an electrostatic charge dissipation material. While PET tends to give amorphous articles, the 60/40 PBT/PET blends crystallised in the time scale of the injection moulding and hence the conductive articles had dimensional stability above the Tg of PET.

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7

Dobó, Zsolt, Tamara Mahner, Balázs Hegedüs e Gábor Nagy. "The influence of PET and PBT contamination during transportation fuel production via pyrolysis". Analecta Technica Szegedinensia 15, n.º 1 (10 de agosto de 2021): 82–87. http://dx.doi.org/10.14232/analecta.2021.1.82-87.

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The pyrolysis of plastic waste is a promising method to reduce waste accumulation while it could provide value-added transportation fuels. The main goal of this study is to investigate the influence of PET and PBT contamination during plastic pyrolysis oil production utilizing HDPE, LDPE, PP, and PS mixtures as these plastics are good candidates for transportation fuel production via pyrolysis and distillation. Seven different waste blends were prepared and pyrolyzed in a laboratory-scale batch reactor equipped with reflux. Mass balance, gas analysis, thermogravimetric analysis, and deposit formation were evaluated. It was concluded that by increasing the PET or PBT concentration in the initial solid waste mixtures, the oil production decreases while the amount of gases increases. Additionally, either PET or PBT generates operational difficulties due to they form deposits in piping system in form of benzoic acid. The maximum concentration of these plastic waste materials was 20% (PET) and 25% (PBT) in this study as further increase blocked the cross-section of piping, causing operational difficulties. Based on the obtained results the concentration of PET and PBT should be limited in waste mixtures when transportation fuel production is desired.

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8

Friedberg, Jonathan W. "PET positive, PET negative, or PET peeve?" Blood 115, n.º 4 (28 de janeiro de 2010): 752–53. http://dx.doi.org/10.1182/blood-2009-09-244947.

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9

Perera, R., C. Rosales, M. A. Araque e M. A. Coelho. "Composites of Pet and PBT/PP with Bentonite". Advanced Materials Research 47-50 (junho de 2008): 1019–22. http://dx.doi.org/10.4028/www.scientific.net/amr.47-50.1019.

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The need for solid-waste management has pushed the development of alternative systems for recycling and revalue used plastic containers. Poly(ethylene terephthalate) (PET) is being widely used as raw material for beverage bottles. However, as has been widely reported, PET undergoes degradation and hydrolysis when reprocessed. On the other hand, poly(butylene terephthalate) (PBT) is another thermoplastic polyester with easy processability but high brittleness and cost. Hence, it has been blended with other polymers such as polypropylene to overcome its disadvantages. In this work, bentonite was incorporated into recycled PET and PBT/polypropylene blends by extrusion. Rheological and tensile properties and processability of the composites thus prepared were studied. Results showed a strong newtonean character of extrudates of recycled PET and higher viscosities and a more pseudoplastic behavior and improved reprocessability when bentonite was added to PET. Furthermore, inclusion of the filler increased its initial degradation temperature, as observed during rheological testing. All composites displayed a brittle behavior. However, the tensile properties of PET composites were not strongly deteriorated. There was a slight increase in the Young’s modulus values and in the tensile strength, with unnoticeable effects on the elongation at break. The Young’s modulus values of PBT/PP composites were not significantly affected.

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10

Ohki, Yuriko, Yohei Ogiwara e Kotohiro Nomura. "Depolymerization of Polyesters by Transesterification with Ethanol Using (Cyclopentadienyl)titanium Trichlorides". Catalysts 13, n.º 2 (16 de fevereiro de 2023): 421. http://dx.doi.org/10.3390/catal13020421.

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Exclusive chemical conversions of polyesters [poly(ethylene adipate) (PEA), poly(butylene adipate) (PBA), poly(ethylene terephthalate) (PET), poly(butylene terephthalate) (PBT)] to the corresponding monomers (diethyl adipate, diethyl terephthalate, ethylene glycol, 1,4-butane diol) by transesterification with ethanol using Cp’TiCl3 (Cp’ = Cp, Cp*) catalyst have been demonstrated. The present acid-base-free depolymerizations by Cp’TiCl3 exhibited completed conversions (>99%) of PET, PBT to afford diethyl terephthalate and ethylene glycol or 1,4-butane diol exclusively (selectivity >99%) without formation of any other by-products in the NMR spectra (150–170 °C, Ti 1.0, or 2.0 mol%). The resultant reaction mixture after the depolymerization of PBA with ethanol via the CpTiCl3 catalyst (1.0 mol%, 150 °C, 3 h), consisting of diethyl adipate and 1,4-butane diol, was heated at 150 °C in vacuo for 24 h to afford high molecular weight recycled PBA with unimodal molecular weight distribution (Mn = 11,800, Mw/Mn = 1.6), strongly demonstrating a possibility of one-pot (acid-base-free) closed-loop chemical recycling.

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11

Kubo, Kazuhiro. "[PET] 4. PET/MRI". Japanese Journal of Radiological Technology 79, n.º 4 (20 de abril de 2023): 373–81. http://dx.doi.org/10.6009/jjrt.2023-2183.

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12

Wagner-Egea, Paula, Lucía Aristizábal-Lanza, Cecilia Tullberg, Ping Wang, Katja Bernfur, Carl Grey, Baozhong Zhang e Javier A. Linares-Pastén. "Marine PET Hydrolase (PET2): Assessment of Terephthalate- and Indole-Based Polyester Depolymerization". Catalysts 13, n.º 9 (24 de agosto de 2023): 1234. http://dx.doi.org/10.3390/catal13091234.

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Enzymatic polyethylene terephthalate (PET) recycling processes are gaining interest for their low environmental impact, use of mild conditions, and specificity. Furthermore, PET hydrolase enzymes are continuously being discovered and engineered. In this work, we studied a PET hydrolase (PET2), initially characterized as an alkaline thermostable lipase. PET2 was produced in a fusion form with a 6-histidine tag in the N-terminal. The PET2 activity on aromatic terephthalate and new indole-based polyesters was evaluated using polymers in powder form. Compared with IsPETase, an enzyme derived from Ideonella sakaiensis, PET2 showed a lower PET depolymerization yield. However, interestingly, PET2 produced significantly higher polybutylene terephthalate (PBT) and polyhexylene terephthalate (PHT) depolymerization yields. A clear preference was found for aromatic indole-derived polyesters over non-aromatic ones. No activity was detected on Akestra™, an amorphous copolyester with spiroacetal structures. Docking studies suggest that a narrower and more hydrophobic active site reduces its activity on PET but favors its interaction with PBT and PHT. Understanding the enzyme preferences of polymers will contribute to their effective use to depolymerize different types of polyesters.

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13

Moreira, Leonardo Marmo, e Juliana Pereira Lyon. "Photodynamic Therapy in Veterinary Medicine: Applications in dogs and cats". Pubvet 16, n.º 6 (junho de 2022): 1–4. http://dx.doi.org/10.31533/pubvet.v16n06a1129.1-4.

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The present article represents a critical review focused on the application of Photodynamic Therapy (PDT) in Veterinary Medicine. Presenting an especial highlight to pet area, this manuscript brings together interesting articles on the application of PDT in pets, especially dogs and cats. Evaluating relevant publications that denote the state-of-art of this area, this present work demonstrates the wide potential of PDT application in several veterinary diseases. In fact, this work presents advantages and disadvantages of PDT and the partially positive results that several important research groups have published. We believe that this work can be useful to researchers and clinical veterinary medicine, mainly those that worked mainly with small animals of the PET area. We believe that this work can be useful for researchers and clinical veterinarians, especially those who work mainly with small animals in the pet area.

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14

Norrie, J., M. E. D. Graham e A. Gosselin. "Potential Evapotranspiration as a Means of Predicting Irrigation Timing in Greenhouse Tomatoes Grown in Peat Bags". Journal of the American Society for Horticultural Science 119, n.º 2 (março de 1994): 163–68. http://dx.doi.org/10.21273/jashs.119.2.163.

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The use of potential evapotranspiration (PET) estimates to identify irrigation timing for greenhouse tomatoes (Lycopersicon esculentum Mill.) grown in peat-based substrate was evaluated for a spring and fall crop. PET (using the Penman equation) was calculated from leaf, wet and dry bulb temperatures, and incident and reflected photosynthetic photon flux. Substrate matric potential (SMP) was monitored continuously using electronic tensiometers. Two irrigation starting setpoints (-4.5 and -6.5 kPa SMP) and two nutrient solution electrical conductivity (EC) treatments (1.5 and 3.0 dS·m-1) were factorially combined in a completely randomized design. Irrigation frequency was greater in treatments irrigated at -4.5 than at -6.5 kPa. The integral of calculated PET values was correlated with SMP for both experiments. Accumulated PET values were higher at the start of irrigation in the -6.5-kPa treatments for spring and fall crops. Nutrient solution EC did not influence irrigation frequency. Leaf pressure potential (LPP) was correlated to PET-predicted LPP (r2 > 0.56) in plants subjected to high EC, low (-6.5 kPa) matric potential setpoint, or both treatments. PET and electronic tensiometer technology can be used jointly to improve irrigation management for tomatoes grown in peat-based substrates by more accurately responding to crop needs for water and nutrients.

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15

Chen, Qing, Pibo Ma, Haiwen Mao, Xuhong Miao e Gaoming Jiang. "The Effect of Knitting Parameter and Finishing on Elastic Property of PET/PBT Warp Knitted Fabric". Autex Research Journal 17, n.º 4 (20 de dezembro de 2017): 350–60. http://dx.doi.org/10.1515/aut-2017-0014.

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Abstract This study investigated the elastic elongation and elastic recovery of the elastic warp knittedfabric made of PET( polyethylene terephthalate) and PBT(polybutylene terephthalate) filament. Using 50/24F PET and 50D/24F PBT in two threadingbars, the tricot, locknit and satin warp knitted fabrics were produced on the E28 tricot warpknitting machine. The knitting parameters influencing the elastic elongation under 100N wereanalyzed in terms of fabric structure, yarn run-in speed and drawing density set on machine.Besides, dyeing temperature and heat setting temperature/time were also examined in order toretain proper elastic elongation and elastic recovery. The relationship between elastic elongationand knitting parameter and finishing parameter were analyzed. Finally, the elastic recovery ofPET/PBT warp knitted fabric was examined to demonstrate the elastic property of final finishedfabric. This study could help us to further exploit the use of PET/PBT warp knitted fabric in thedevelopment of elastic garment in future.

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16

Norrie, J., M. E. D. Graham, P. A. Dubé e A. Gosselin. "Improvements in Automatic Irrigation of Peat-grown Greenhouse Tomatoes". HortTechnology 4, n.º 2 (abril de 1994): 154–59. http://dx.doi.org/10.21273/horttech.4.2.154.

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An automatic irrigation system was designed for use on green-house tomatoes growing in peat-based substrates. This system uses electronic tensiometers to monitor continuously substrate matric potential (SMP) in peat-bags. The system also uses the Penman equation to evaluate potential evapotranspiration (PET) through the acquisition of many greenhouse environmental parameters. Through a series of linear equations, estimates of PET are used in a computer-controller system to vary the electrical conductivity (EC) of irrigated nutrient solutions, as well as SMP setpoints at which irrigations are started. Such modifications to current irrigation management systems may improve fruit quality and reduce the risk of water stress during periods of high PET by irrigating more frequently with less-concentrated nutrient solutions. Conversely, during periods of low PET, irrigation is less frequent with more-concentrated nutrient solutions. Although no differences were found in fruit number or overall yield using variable nutrient solution EC, plant fresh weight was higher in those treatments. It is concluded that an integrated tensiometer-PET system may give increased precision to irrigation management and the control of crop growth in the greenhouse.

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17

von Schulthess, Gustav K., e Thomas F. Hany. "Imaging and PET — PET/CTimaging". Journal de Radiologie 89, n.º 3 (março de 2008): 438–48. http://dx.doi.org/10.1016/s0221-0363(08)89019-1.

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18

Avramova, Nadka. "Amorphous Blends of Poly(Ethylene Terephthalate) and Poly(Butylene Terephthalate) through Ultraquenching". Engineering Plastics 2, n.º 5 (janeiro de 1994): 147823919400200. http://dx.doi.org/10.1177/147823919400200501.

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Blends of poly(ethylene terephthalate) (PET) and poly(butylene terephthalate) (PBT) are obtained by means of an ultraquenching technique. The thermal behaviour, crystallization behaviour and mechanical properties are investigated by differential scanning calorimetry (DSC), wide angle X-ray scattering (WAXS) and mechanical testing. The results for as-quenched blends are compared with those for the same blends after three years of storage at -15°C. Both calorimetric and X-ray studies indicate that immediately after preparation, the blends are amorphous regardless of the composition. The stored blends are also amorphous. The thermal and mechanical properties of asquenched samples change significantly after a long time at low temperature relaxation. As-quenched blends exhibit two glass transition temperatures, while after the storage, at each composition, they are characterized by a single Tg intermediate between those of the pure components. It is demonstrated that ultraquenched PET/PBT blends are miscible in an amorphous state. Both components crystallize simultaneously at all compositions. Each component forms its own crystal phase and the presence of the other one does not disturb but enhances the crystallization process. A well expressed positive synergistic effect is observed in the mechanical properties of PET/PBT blends. Better performance of the ultraquenched PET/PBT blends is explained by their initial amorphous structure and amorphous miscibility.

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19

Avramova, Nadka. "Amorphous Blends of Poly(Ethylene Terephthalate) and Poly(Butylene Terephthalate) through Ultraquenching". Polymers and Polymer Composites 2, n.º 5 (janeiro de 1994): 277–85. http://dx.doi.org/10.1177/096739119400200501.

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Blends of poly(ethylene terephthalate) (PET) and poly(butylene terephthalate) (PBT) are obtained by means of an ultraquenching technique. The thermal behaviour, crystallization behaviour and mechanical properties are investigated by differential scanning calorimetry (DSC), wide angle X-ray scattering (WAXS) and mechanical testing. The results for as-quenched blends are compared with those for the same blends after three years of storage at -15°C. Both calorimetric and X-ray studies indicate that immediately after preparation, the blends are amorphous regardless of the composition. The stored blends are also amorphous. The thermal and mechanical properties of asquenched samples change significantly after a long time at low temperature relaxation. As-quenched blends exhibit two glass transition temperatures, while after the storage, at each composition, they are characterized by a single Tg intermediate between those of the pure components. It is demonstrated that ultraquenched PET/PBT blends are miscible in an amorphous state. Both components crystallize simultaneously at all compositions. Each component forms its own crystal phase and the presence of the other one does not disturb but enhances the crystallization process. A well expressed positive synergistic effect is observed in the mechanical properties of PET/PBT blends. Better performance of the ultraquenched PET/PBT blends is explained by their initial amorphous structure and amorphous miscibility.

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20

Seiler, Stephen, e Robert E. Lenkinski. "Dedicated PET device for breast PET and MRI/PET correlations". European Journal of Radiology 81 (setembro de 2012): S149—S150. http://dx.doi.org/10.1016/s0720-048x(12)70062-1.

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21

Lee, Sung Kong, Young Sil Lee e Kwan Han Yoon. "Thermal and Mechanical Properties of PET/PEN-FBPE Copolymers Containing Fluorenylidenebis(2-phenoxyethanol)". Polymer Korea 41, n.º 5 (30 de setembro de 2017): 844–49. http://dx.doi.org/10.7317/pk.2017.41.5.844.

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22

Menzel, C., M. Diehl, N. Hamscho, K. Zaplatnikov, F. Grünwald e N. Döbert. "Increased FDG bone marrow uptake after intracoronary progenitor cell therapy". Nuklearmedizin 44, n.º 01 (2005): 15–19. http://dx.doi.org/10.1055/s-0038-1623921.

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SummaryPatients with coronary artery disease who undergo FDG PET for therapy monitoring after intracoronary progenitor cell infusion (PCT) show an increased bone marrow up-take in some cases. Aim of the study was to evaluate the systemic bone marrow glucose metabolism in this patient group after PCT. Patients, methods: FDG bone marrow uptake (BMU), measured as standardized uptake value (SUVmax) in the thoracic spine, was retrospectively evaluated in 23 control patients who did not receive PCT and in 75 patients who received PCT 3 ± 2.2 days before PET scanning. Five out of them were pretreated with granulocyte colony-stimulating factor (G-CSF) 5 days prior to PCT and 10 ± 1.2 days before PET scanning. In 39 patients who received only PCT without G-CSF and underwent PET therapy monitoring 4 months later, baseline and follow up bone marrow uptake were measured. Leucocytes, C-reactive protein (CRP) levels and the influence of nicotine consumption were compared with the BMU. Results: In patients (n = 70) who received PCT without G-CSF, BMU median (1.3) was slightly, but significantly higher than in the controls (1.0) (p = 0.02) regardless nicotine consumption. BMU did not change significantly 4 months later (1.2) (p = 0.41, n.s.). After G-CSF pretreatment, patients showed a significantly higher bone marrow uptake (3.7) compared to patients only treated with PCT (1.3) (p = 0.023). Leucocyte blood levels were significantly higher in patients with a BMU ≥ 2.5 compared to patients with a bone marrow SUVmax < 2.5 (p <0.001). CRP values did not correlate with the BMU (rho -0.02, p = 0.38). Conclusion: Monitoring PCT patients, a slightly increased FDG BMU may be observed which remains unchanged for several months. Unspecific bone marrow reactions after PCT may be associated with increased leucocyte blood levels and play a role in the changed systemic glucose BMU.

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23

&NA;. "PET". Pediatric Physical Therapy 7, n.º 1 (1995): 44. http://dx.doi.org/10.1097/00001577-199500710-00023.

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Xu, Zichen, Yi-Cheng Tu e Xiaorui Wang. "PET". Proceedings of the VLDB Endowment 5, n.º 12 (agosto de 2012): 1954–57. http://dx.doi.org/10.14778/2367502.2367546.

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25

&NA;. "PET". Clinical Nuclear Medicine 24, n.º 10 (outubro de 1999): 827. http://dx.doi.org/10.1097/00003072-199910000-00040.

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&NA;. "PET". Clinical Nuclear Medicine 24, n.º 11 (novembro de 1999): 909. http://dx.doi.org/10.1097/00003072-199911000-00037.

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&NA;. "PET". Clinical Nuclear Medicine 24, n.º 12 (dezembro de 1999): 1006. http://dx.doi.org/10.1097/00003072-199912000-00042.

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&NA;. "PET". Clinical Nuclear Medicine 25, n.º 1 (janeiro de 2000): 83. http://dx.doi.org/10.1097/00003072-200001000-00038.

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&NA;. "PET". Clinical Nuclear Medicine 25, n.º 2 (fevereiro de 2000): 158. http://dx.doi.org/10.1097/00003072-200002000-00033.

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&NA;. "PET". Pediatric Physical Therapy 7, n.º 1 (1995): 44. http://dx.doi.org/10.1097/00001577-199507010-00023.

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31

Nanni, C., S. Fanti e D. Rubello. "18F-DOPA PET and PET/CT". Journal of Nuclear Medicine 48, n.º 10 (1 de outubro de 2007): 1577–79. http://dx.doi.org/10.2967/jnumed.107.041947.

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Joseph, U. A. "Cardiac PET and PET/CT Imaging". Journal of Nuclear Medicine 49, n.º 6 (15 de maio de 2008): 1029–30. http://dx.doi.org/10.2967/jnumed.108.050609.

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Perani, Daniela. "FDG-PET and amyloid-PET imaging". Current Opinion in Neurology 27, n.º 4 (agosto de 2014): 405–13. http://dx.doi.org/10.1097/wco.0000000000000109.

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Laffon, E. "PET and PET-CT in oncology". Journal de Radiologie 86, n.º 2 (fevereiro de 2005): 181. http://dx.doi.org/10.1016/s0221-0363(05)81342-3.

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Humm, John L., Anatoly Rosenfeld e Alberto Del Guerra. "From PET detectors to PET scanners". European Journal of Nuclear Medicine and Molecular Imaging 30, n.º 11 (2 de outubro de 2003): 1574–97. http://dx.doi.org/10.1007/s00259-003-1266-2.

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Strickler, Beth Groetzinger. "Helping Pet Owners Change Pet Behaviors". Veterinary Clinics of North America: Small Animal Practice 48, n.º 3 (maio de 2018): 419–31. http://dx.doi.org/10.1016/j.cvsm.2017.12.008.

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Wolff, Sandy, Susan T. Masih e Marcum Martz. "A PET Potpourri or PET Peeves". Health Physics 93, suppl 2 (agosto de 2007): S117—S118. http://dx.doi.org/10.1097/01.hp.0000268305.89856.c4.

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Hanaoka, Kohei, Shota Watanabe, Daisuke Ishikawa e Kazunari Ishii. "[PET] 2. Dedicated Breast PET System". Japanese Journal of Radiological Technology 79, n.º 1 (20 de janeiro de 2023): 90–96. http://dx.doi.org/10.6009/jjrt.2023-2144.

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Büther, Florian. "Von PET und PET/CT zur PET/MRT: Ein technologisches Update". Der Nuklearmediziner 41, n.º 03 (setembro de 2018): 202–10. http://dx.doi.org/10.1055/a-0621-3171.

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ZusammenfassungDer vorliegende Beitrag beleuchtet die wichtigsten technologischen Neuerungen auf dem Gebiet der Positronen-Emissions-Tomografie (PET) der letzten Jahre. Sowohl auf Seiten der Hardware als auch im Bereich der eingesetzten Algorithmen sorgt der Fortschritt dafür, dass die PET-Bildgebung einer der grundlegenden Pfeiler der nuklearmedizinischen Diagnostik bleiben wird. Insbesondere neue Detektoren (Szintillatormaterialien, Lichtdetektoren, Elektronik) – nicht nur für die neue PET/MRT-Bildgebung, sondern auch für die konventionelle PET/CT-Bildgebung – als auch neue Rekonstruktions- und Korrekturmethoden (iterative sowie Flugzeit- und Punktspreizantwort-basierte Rekonstruktionen, Schwächungs- und Bewegungskorrektur) sind für diese Entwicklung verantwortlich. Besonders im Hinblick auf gesteigerte Sensitivitäten und räumliche Auflösung ergeben sich hiermit interessante Perspektiven sowohl für die Grundlagenforschung als auch für klinische Anwendungen.

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Farmakis, G., e D. Hellwig. "F-18-Fluorid-Skelettdiagnostik mit PET, PET/CT und PET/MRT". Der Nuklearmediziner 39, n.º 01 (22 de março de 2016): 22–29. http://dx.doi.org/10.1055/s-0042-101479.

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Ahmed Shamim, Shamim, Drew A. Torigian e Rakesh Kumar. "PET, PET/CT, and PET/MR Imaging Assessment of Breast Cancer". PET Clinics 3, n.º 3 (julho de 2008): 381–93. http://dx.doi.org/10.1016/j.cpet.2009.01.001.

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Qiu, Hui-Zhi, Xu Zhang, Sai-Lan Liu, Xue-Song Sun, Yi-Wen Mo, Huan-Xin Lin, Zi-Jian Lu et al. "M1 stage subdivisions based on ¹⁸F-FDG PET-CT parameters to identify locoregional radiotherapy for metastatic nasopharyngeal carcinoma". Therapeutic Advances in Medical Oncology 14 (janeiro de 2022): 175883592211187. http://dx.doi.org/10.1177/17588359221118785.

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Purpose: To establish a risk classification of de novo metastatic nasopharyngeal carcinoma (mNPC) patients based on 18F-fluorodeoxyglucose positron emission tomography/computed tomography (18F-FDG PET-CT) radiomics parameters to identify suitable candidates for locoregional radiotherapy (LRRT). Methods: In all, 586 de novo mNPC patients who underwent 18F-FDG PET-CT prior to palliative chemotherapy (PCT) were involved. A Cox regression model was performed to identify prognostic factors for overall survival (OS). Candidate PET-CT parameters were incorporated into the PET-CT parameter score (PPS). Recursive partitioning analysis (RPA) was applied to construct a risk stratification system. Results: Multivariate Cox regression analyses revealed that total lesion glycolysis of locoregional lesions (LRL-TLG), the number of bone metastases (BMs), metabolic tumor volume of distant soft tissue metastases (DSTM-MTV), pretreatment Epstein–Barr virus DNA (EBV DNA), and liver involvement were independent prognosticators for OS. The number of BMs, LRL-TLG, and DSTM-MTV were incorporated as the PPS. Eligible patients were divided into three stages by the RPA-risk stratification model: M1a (low risk, PPSlow + no liver involvement), M1b (intermediate risk, PPSlow + liver involvement, PPShigh + low EBV DNA), and M1c (high risk, PPShigh + high EBV DNA). PCT followed by LRRT displayed favorable OS rates compared to PCT alone in M1a patients ( p < 0.001). No significant survival difference was observed between PCT plus LRRT and PCT alone in M1b and M1c patients ( p > 0.05). Conclusions: The PPS-based RPA stratification model could identify suitable candidates for LRRT. Patients with stage M1a disease could benefit from LRRT.

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Liu, Qingqing, Yanting Gu, Wei Xu, Tao Lu, Wenjun Li e Haibin Fan. "Compressive Properties of Polyurethane Fiber Mattress Filling Material". Applied Sciences 12, n.º 12 (16 de junho de 2022): 6139. http://dx.doi.org/10.3390/app12126139.

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There is an inevitable trend toward exploring new, environmentally friendly fibers that can be used as raw material for mattresses with moderate hardness and air-permeable characteristics. Ethylene-propylene side by side (ES), high-shrinkage fibers, and thermoplastic polyester elastomer (TPEE) chips were introduced into polyethylene glycol terephthalate (PET)/polybutylene terephthalate (PBT) chip by melt blending to modify PET/PBT fiber. The modified PET/PBT (hereinafter referred to as PLON) is more suitable for mattress filling material than PET/PBT. To explore the compressive properties of PLON cushion made of PLON fiber and expand the scope of the PLON cushion’s application, a layered hardness test, hardness classification test and variance analysis were used to comprehensively evaluate the surface hardness, core hardness, bottom hardness and hardness classification of the mattress made of PLON cushion. The conclusions are: (1) The materials of the support layer have a significant effect on the hardness grade S. The hardness of the mattress with PLON as the support layer is between the spring and the coir; (2) when PLON is used as the material of the support layer, it possesses higher supporting force than coir and the characteristics of light weight and high resilience, which coir does not have; it is also softer than a spring mattress. As cushion material, it provides higher support for mattresses than foam. Practical applications, densities and structure were clarified through the above research, with implications for broader applications for PLON blocks in mattress products.

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Cho, Minjeong, Jeongin Yang, Seunghyun Noh, Hongjae Joe e Myungwan Han. "Production of PBT(polybutylene terephthalate) Oligomer from Recycled PET(polyethylene terephthalate)". Korean Chemical Engineering Research 54, n.º 4 (1 de agosto de 2016): 437–42. http://dx.doi.org/10.9713/kcer.2016.54.4.437.

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Kairemo, Kalevi, Nigora Rasulova, Kaarina Partanen e Timo Joensuu. "Preliminary Clinical Experience oftrans-1-Amino-3-(18)F-fluorocyclobutanecarboxylic Acid (anti-(18)F-FACBC) PET/CT Imaging in Prostate Cancer Patients". BioMed Research International 2014 (2014): 1–7. http://dx.doi.org/10.1155/2014/305182.

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Background.In this retrospective analysis we assessed the role of [18F]-FACBC-PET/CT in the prostatic cancer staging.Procedure.30 first [18F]-FACBC-PET/CT images of 26 patients (68.1 ± 5.8 years) were analyzed. PET/CT findings were compared with PSA concentrations, with PSA doubling times (PDT), and with correlative imaging.Results.On 16 [18F]-FACBC (53.3%) scans, 58 metabolically active lesions were found. 12 (20.7%) lesions corresponding to the local relapse were found in prostate/prostate bed and seminal vesicles, 9 (15.5%) lesions were located in regional lymph nodes, 10 (17.2%) were located in distal lymph nodes, and 26 (44.8%) metabolically active lesions were found in the skeleton. In one case, focal uptake was found in the brain, confirmed further on MRI as meningioma. The mean S-PSA level in patients with positive [18F]-FACBC findings was 9.5 ± 16.9 μg/L (0.54–69 μg/L) and in patients with negative [18F]-FACBC findings was 1.96 ± 1.87 μg/L (0.11–5.9 μg/L), but the difference was not statistically significant. However, the PSA doubling time (PDT) in patients with positive findings was significantly shorter than PDT in patients with negative findings: 3.25 ± 2.09 months (0.3–6 months) versus 31.2 ± 22.02 months (8–84 months),P<0.0001. There was a strong positive correlation between PSA value and number of metabolically active lesions (R=0.74) and a negative correlation between PDT and number of metabolically active lesions (R=-0.56). There was a weak negative correlation between PDT andSUVmax⁡(R=-0.30).Conclusion.According to our preliminary clinical experience, [18F]-FACBC-PET may play a role inin vivorestaging of an active prostate cancer, especially in patients with a short S-PSA doubling time.

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XU, Kepeng, Qianqian OU, Hong XUE, Dongli LUO, Shuyue ZHANG e Yan XU. "Traditional pettism: The influence of pet ownership status, pet type, and pet properties on pet moral standing". Acta Psychologica Sinica 55, n.º 10 (2023): 1662. http://dx.doi.org/10.3724/sp.j.1041.2023.01662.

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Giannatempo, Patrizia, Alessandra Alessi, Daniele Raggi, Elena Farè, Silvia Tana, Nicola Nicolai, Gianluca Serafini et al. "Interim [18f] fluorodeoxyglucose positron emission tomography (PET) for early metabolic assessment of response to PEB chemotherapy for metastatic seminoma: Preliminary findings." Journal of Clinical Oncology 33, n.º 7_suppl (1 de março de 2015): 381. http://dx.doi.org/10.1200/jco.2015.33.7_suppl.381.

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381 Background: A risk-adapted strategy for metastatic seminoma may further refine the necessary burden of chemotherapy while sparing futile treatment. The objective of this study was to evaluate the association of the early metabolic response to cisplatin, etoposide, and bleomycin (PEB) and dimensional response. Methods: Patients (pts) with newly-diagnosed seminoma and who were candidate to PEB were staged at baseline by computed tomography (CT), PET and serum tumor markers (STM). Then, restaging with PET after 2 cycles of PEB (PET2), and with CT after treatment (3-4 cycles [CT3-4]) were provided. One (greatest) target lesion was chosen to evaluate metabolic/dimensional changes. Wilcoxon rank sum test was used to analyze the association between PET response and either the shrinkage of target lesion (primary endpoint) or baseline, or final dimensions. Results: In the time-frame 02/2009-11/2013, 37 pts have been enrolled. Two pts had CSIIA, 13 CSIIB, 13 CSIIC, and 9 CSIII. 3 had an intermediate prognosis because of liver (n=1) and bone (n=2) disease. The latter were recognized by PET while having a bone-negative CT scan. 4 had a retroperitoneal and 1 a mediastinal primary. All pts had a PET-positive target disease. After 2 cycles of PEB, 27 pts (72.9%) had a metabolic complete response (CR), 10 a partial response (PR). 12 pts had a CR at CT3-4. Median follow up was 18 months (IQR: 13-23). A significant association was found between PET2 response and baseline (p=0.003), final diameter (p<0.001), and % of tumor shrinkage (p=0.014). Pts with PET2 CR had a median residual diameter of 1.2 cm (IQR: 1-1.9) while pts with PET2 PR 3.75 cm (IQR: 2.6-6.1, p=0.002). 6 Pts received RT after PEB. 2/10 pts with PET2 PR had a relapse (0/27 CR). Conclusions: A significant association was found between PET2 response and tumor shrinkage in pts with metastatic seminoma. PET2 CR pts could be predicted not to need additional re-imaging or treatment after PEB, and simplifying the follow up should be an endpoint. PET2 PR category includes pts yielding a difficult-to-treat disease. A detailed cost-efficacy analysis of the strategy will be required further.

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Gelila Berhan, Tessema, Worku Toyiba Ahemed e Tessema Zelalem Birhan. "Programmable Pet Feeder". International Journal of Scientific Engineering and Research 3, n.º 11 (27 de novembro de 2015): 99–104. https://doi.org/10.70729/ijser15587.

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MATSUOKA, Hideo. "Recycling of PET". Kobunshi 48, n.º 10 (1999): 793. http://dx.doi.org/10.1295/kobunshi.48.793.

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Coleman, R. E., B. E. Hillner, A. F. Shields, F. Duan, D. A. Merlino, L. G. Hanna, S. H. Stine e B. A. Siegel. "PET and PET/CT Reports: Observations from the National Oncologic PET Registry". Journal of Nuclear Medicine 51, n.º 1 (15 de dezembro de 2009): 158–63. http://dx.doi.org/10.2967/jnumed.109.066399.

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