Journal articles: 'DP 980'

1

Pedro, Álvaro Alberto, Fábio Steiner, Alan Mario Zuffo, Gabriel Zanuto Douradinho, and Camilla Paulino de Oliveira. "CRESCIMENTO INICIAL DE CULTIVARES DE ALGODOEIRO SUBMETIDO AO ESTRESSE SALINO." JOURNAL OF NEOTROPICAL AGRICULTURE 3, no. 4 (October 7, 2016): 32–38. http://dx.doi.org/10.32404/rean.v3i4.1183.

Full text

Abstract:

A seleção de cultivares de algodoeiro com maior tolerância ao estresse salino pode melhorar a emergência das plantas e garantir a adequada uniformidade de estande. Este estudo teve como objetivo comparar a tolerância à salinidade de cultivares de algodoeiro (Gossypium hirsutum L.) durante a fase inicial de crescimento das plântulas. Os tratamentos foram constituídos por seis cultivares de algodão (FM 910, FM 980 GLT, TMG 42 WS, TMG 82 WS, DP 1240 B2RR e DP 1228 B2R) e por cinco níveis de condutividade elétrica da água de irrigação [0,0; 2,5; 5,0, 10,0 e 20,0 dS m–1]. Os cultivares de algodão DP 1228 B2RF e DP 1240 B2RR apresentaram os melhores índices de emergência das plântulas até o nível de salinidade de 10,0 dS m–1, sugerindo que estes cultivares são moderadamente tolerantes ao estresse salino durante a fase de germinação das sementes; todavia, o crescimento inicial desses cultivares foram afetados negativamente a partir da condutividade elétrica de 2,5 e 5,0 dS m–1, respectivamente. Os cultivares de algodão FM 910, FM 980 GLT e TMG 42 WS são mais susceptíveis aos efeitos negativos do estresse salino por apresentarem os menores índices de emergência e menor taxa de crescimento das plântulas. Altas concentrações de salinidade (20,0 dS m–1) inibem completamente o processo de germinação de todos os cultivares estudados.

APA, Harvard, Vancouver, ISO, and other styles

2

Saunders, Nathan, Michael Miles, Trent Hartman, Yuri Hovanski, Sung-Tae Hong, and Russell Steel. "Joint strength in high speed friction stir spot welded DP 980 steel." International Journal of Precision Engineering and Manufacturing 15, no. 5 (May 2014): 841–48. http://dx.doi.org/10.1007/s12541-014-0407-9.

Full text

APA, Harvard, Vancouver, ISO, and other styles

3

Ibragim, M. H., and G. M. Torbin. "A probabilistic approach to studies of DP-transformations and faithfullness of covering systems to evaluate the Hausdorff–Besicovitch dimension." Theory of Probability and Mathematical Statistics 92 (August 10, 2016): 23–36. http://dx.doi.org/10.1090/tpms/980.

Full text

APA, Harvard, Vancouver, ISO, and other styles

4

Hu, Xiaohua, Xin Sun, Kavesary Raghavan, R. J. Comstock, and Yang Ren. "Linking constituent phase properties to ductility and edge stretchability of two DP 980 steels." Materials Science and Engineering: A 780 (April 2020): 139176. http://dx.doi.org/10.1016/j.msea.2020.139176.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

Squires, L., Y. C. Lim, M. P. Miles, and Z. Feng. "Mechanical properties of dissimilar metal joints composed of DP 980 steel and AA 7075-T6." Science and Technology of Welding and Joining 20, no. 3 (March 18, 2015): 242–48. http://dx.doi.org/10.1179/1362171815y.0000000013.

Full text

APA, Harvard, Vancouver, ISO, and other styles

6

Mohrbacher, Hardy, Jer-Ren Yang, Yu-Wen Chen, Johannes Rehrl, and Thomas Hebesberger. "Metallurgical Effects of Niobium in Dual Phase Steel." Metals 10, no. 4 (April 12, 2020): 504. http://dx.doi.org/10.3390/met10040504.

Full text

Abstract:

Dual phase (DP) steels are widely applied in today’s automotive body design. The favorable combination of strength and ductility in such steels is in first place related to the share of ferrite and martensite. The pronounced work hardening behavior prevents localized thinning and allows excellent stretch forming. Niobium microalloying was originally introduced to dual phase steel for improving bendability by refining the microstructure. More recently developed “high ductility” (HD) DP steel variants provide increased drawability aided by a small share of austenite retained in the microstructure. In this variant niobium microalloying produces grain refinement and produces a dispersion of nanometer-sized carbide precipitates in the steel matrix which additionally contributes to strength. This study investigates the microstructural evolution and progress of niobium precipitation during industrial processing of high-ductility DP 980. The observations are interpreted considering the solubility and precipitation kinetics of niobium. The influences of niobium on microstructural characteristics and its contributions to strength and formability are discussed.

APA, Harvard, Vancouver, ISO, and other styles

7

Miles, M. P., C. S. Ridges, Y. Hovanski, J. Peterson, M. L. Santella, and R. Steel. "Impact of tool wear on joint strength in friction stir spot welding of DP 980 steel." Science and Technology of Welding and Joining 16, no. 7 (October 2011): 642–47. http://dx.doi.org/10.1179/1362171811y.0000000047.

Full text

APA, Harvard, Vancouver, ISO, and other styles

8

Lee, Jong-sup, Sun-Yong Choi, Sang-kyo Lee, Jung-han Song, Wooram Noh, Seogou Choi, and Geun-ho Kim. "Roll forming process of automotive seat rail with 980 DP steel using Yoshida-Uemori kinematic hardening model." Procedia Manufacturing 15 (2018): 796–803. http://dx.doi.org/10.1016/j.promfg.2018.07.409.

Full text

APA, Harvard, Vancouver, ISO, and other styles

9

Yang, Jin, Yulong Li, Hua Zhang, Wei Guo, David Weckman, and Norman Zhou. "Dissimilar Laser Welding/Brazing of 5754 Aluminum Alloy to DP 980 Steel: Mechanical Properties and Interfacial Microstructure." Metallurgical and Materials Transactions A 46, no. 11 (July 28, 2015): 5149–57. http://dx.doi.org/10.1007/s11661-015-3079-x.

Full text

APA, Harvard, Vancouver, ISO, and other styles

10

Taniguchi, Koichi, Yong Chae Lim, Alexis Flores-Betancourt, and Zhili Feng. "Transient Microstructure Evolutions and Local Properties of Dual-Phase 980 MPa Grade Steel Via Friction Stir Spot Processing." Materials 13, no. 19 (October 2, 2020): 4406. http://dx.doi.org/10.3390/ma13194406.

Full text

Abstract:

Friction stir processing is a novel solid-state process to modify microstructures and their properties by intense, localized plastic deformation. However, little research has been reported for microstructure evolutions of advanced high-strength steels during the process. The present work focuses on the study of transient microstructure changes and local mechanical properties for friction stir spot processed dual-phase (DP) 980 MPa grade steel (DP980) under different peak temperatures. A pinless silicon nitride ceramic tool was used to produce relatively simple material deformation and flow near the tool. Friction stir spot processed steel samples were characterized by optical and electron microscopies. Furthermore, Vickers microhardness and nano-indentation measurements were used to study local mechanical properties for correlation with microstructures. A swallow layer of refined grains (<0.6 µm) was obtained with a low peak temperature (under 400 °C), whereas higher peak temperatures (>Ac1) led to a change in grain size with different microstructures (fine-grained DP or martensite). Electron back-scattered diffraction characterizations revealed a large deformation in the as-received microstructures (mixture of ferrite and tempered martensite) induced by friction stir spot processing, leading to recrystallization and grain refinement around the stirred zone. Also, nano-indentation measurements showed a higher hardness than the hardness of the as-received DP980. Friction stir processing with different process conditions effectively changed microstructures and local mechanical properties.

APA, Harvard, Vancouver, ISO, and other styles

11

Souto, Nelson, António Andrade-Campos, and Sandrine Thuillier. "Shape Optimization of the Conventional Simple Shear Specimen." Key Engineering Materials 554-557 (June 2013): 2156–64. http://dx.doi.org/10.4028/www.scientific.net/kem.554-557.2156.

Full text

Abstract:

Shear tests of rectangular sample are widely used by the scientific community for characterizing the material behavior due to large strains obtained. However, for some hard metals, such as the dual-phase steel DP 980, premature rupture occurs in the vicinity of the grips. Due to this fact, the shape of the shear specimen is optimized in this work with the aim of maximizing the deformation achieved in the central part of the specimen without the occurrence of rupture near the grips. As the rupture occurs at the corners of the shear specimen only the boundaries are subjected to shape optimization. A representation with cubic splines is adopted for the definition of the boundaries geometry. The material is defined by Hill’s 1948 yield criterion combined with an isotropic hardening law. Two macroscopic rupture criteria are considered and an objective function approach based on the maximization of the shear strain average value is defined. For this study, a direct search optimization method is used for minimizing the objective function. The optimized geometries obtained for the different rupture criteria and different set of design variables are compared. The use of a larger number of design variables allows to obtain optimized geometries with higher average shear strain. The best specimen geometry shape allows increasing the maximum deformation of DP 980 steel to 1.05 without occurrence of rupture. In addition, the final specimen geometries show a concave shape for the boundaries which means that this kind of shape is the best one to delay the rupture in shear specimens.

APA, Harvard, Vancouver, ISO, and other styles

12

Song, Hong-Wu, Dong-Zhi Sun, Florence Andrieux, and Shi-Hong Zhang. "Determination of instability of a DP 980 steel sheet under different stress states based on experiment and theoretical models." MATEC Web of Conferences 80 (2016): 03007. http://dx.doi.org/10.1051/matecconf/20168003007.

Full text

APA, Harvard, Vancouver, ISO, and other styles

13

Hartman, T., M. P. Miles, S. T. Hong, R. Steel, and S. Kelly. "Effect of PCBN tool grade on joint strength and tool life in friction stir spot welded DP 980 steel." Wear 328-329 (April 2015): 531–36. http://dx.doi.org/10.1016/j.wear.2015.03.001.

Full text

APA, Harvard, Vancouver, ISO, and other styles

14

Rickhey, Felix, Minsoo Kim, and Seokmoo Hong. "Gauge length and frame rate dependence of the onset of instability and the fracture limit of DP 980 sheets." Engineering Research Express 2, no. 2 (June 30, 2020): 025045. http://dx.doi.org/10.1088/2631-8695/ab9d6c.

Full text

APA, Harvard, Vancouver, ISO, and other styles

15

Garcia, Calixto Isaac, Kengun Cho, Konstantin Redkin, Anthony John Deardo, Susheng Tan, Mahesh Somani, and Leo Pentti Karjalainen. "Influence of Critical Carbide Dissolution Temperature during Intercritical Annealing on Hardenability of Austenite and Mechanical Properties of DP-980 Steels." ISIJ International 51, no. 6 (2011): 969–74. http://dx.doi.org/10.2355/isijinternational.51.969.

Full text

APA, Harvard, Vancouver, ISO, and other styles

16

Noder, Jacqueline, Jon Edward Gutierrez, Amir Zhumagulov, James Dykeman, Hesham Ezzat, and Clifford Butcher. "A Comparative Evaluation of Third-Generation Advanced High-Strength Steels for Automotive Forming and Crash Applications." Materials 14, no. 17 (August 31, 2021): 4970. http://dx.doi.org/10.3390/ma14174970.

Full text

Abstract:

While the third generation of advanced high-strength steels (3rd Gen AHSS) have increasingly gained attention for automotive lightweighting, it remains unclear to what extent the developed methodologies for the conventional dual-phase (DP) steels are applicable to this new class of steels. The present paper provides a comprehensive study on the constitutive, formability, tribology, and fracture behavior of three commercial 3rd Gen AHSS with an ultimate strength level ranging from 980 to 1180 MPa which are contrasted with two DP steels of the same strength levels and the 590R AHSS. The hardening response to large strain levels was determined experimentally using tensile and shear tests and then evaluated in 3D simulations of tensile tests. In general, the strain rate sensitivity of the two 3rd Gen 1180 AHSS was significantly different as one grade exhibited larger transformation-induced behavior. The in-plane formability of the three 1180 MPa steels was similar but with a stark contrast in the local formability whereas the opposite trend was observed for the 3rd Gen 980 and the DP980 steel. The forming limit curves could be accurately predicted using the experimentally measured hardening behavior and the deterministic modified Bressan–Williams through-thickness shear model or the linearized Modified Maximum Force Criterion. The resistance to sliding of the three 3rd Gen AHSS in the Twist Compression Test revealed a comparable coefficient of friction to the 590R except for the electro-galvanized 3rd Gen 1180 V1. An efficient experimental approach to fracture characterization for AHSS was developed that exploits tool contact and bending to obtain fracture strains on the surface of the specimen by suppressing necking. Miniature conical hole expansion, biaxial punch tests, and the VDA 238-100 bend test were performed to construct stress-state dependent fracture loci for use in forming and crash simulations. It is demonstrated that, the 3rd Gen 1180 V2 can potentially replace the DP980 steel in terms of both the global and local formability.

APA, Harvard, Vancouver, ISO, and other styles

17

Meledeo, Michael Adam, Grantham Peltier, James Bynum, and Andrew P. Cap. "Fibrinogen-Mediated Platelet Microaggregate Formation in Stored Whole Blood." Blood 134, Supplement_1 (November 13, 2019): 1172. http://dx.doi.org/10.1182/blood-2019-131053.

Full text

Abstract:

Introduction: Whole blood is regaining popularity in resuscitation after hemorrhage. The platelet storage lesion that has been observed in apheresis platelets also exists in whole blood, where platelet count and aggregation response decline rapidly after collection and during storage in the blood bank. Platelet microaggregates form in unfiltered whole blood, resulting in relatively large but unstable thrombus formation in a flow model over collagen. We hypothesized that the presence of fibrinogen activates platelets within the whole blood unit and predisposes them toward premature aggregate formation. Methods: Fresh whole blood (WB) was collected in citrate tubes (4.3%, 10.9 mM) from healthy donors (n=4) according to an institutionally approved standard operating procedure. Blood was centrifuged at 200-g to collect the platelet-rich plasma (PRP). The remaining red blood cell (RBC) fraction was centrifuged at 2000-g to pellet RBCs which were washed with HEPES-buffered saline and repelleted; platelet-poor plasma (PPP) was saved. The PRP fraction was centrifuged with 1 µM prostacyclin at 700-g, and the platelet pellet was washed with Tyrode's buffer, repelleted, and resuspended in either fibrinogen-deficient plasma (Fg-DP) or PPP. Platelets were combined with washed RBCs to generate a reassembled whole blood sample containing 150,000 platelets/µl and a hematocrit of 40%. Samples were added to minibags and stored at 4 °C for 14 days. On days of testing (0, 3, 7, 14), 1 ml aliquots were stained with 1 µM calcein-AM for 30 min at 37 °C and run on the BioFlux 1000 microfluidics platform with arterial flow rates generating a shear rate of 980 s-1 over a collagen surface. Fluorescence microscopy images were captured and quantified over 10 min to observe platelet adhesion to the surface. Complete blood count (CBC) was measured on each aliquot. In a follow-up study, unmanipulated, stored whole blood was passed through a standard transfusion filter (200 µm pores) to determine the effects of removing microaggregates prior to microfluidics flow testing at each time point. Results: CBC results are in Figure 1, illustrating the decline of platelet count over storage as previously observed. Figure 2 shows representative images captured at the end of the 10 min flow period. In samples containing normal plasma, thrombus formation is impaired by day 3 of storage with aggregate structures appearing immediately in the microscopy images. These aggregates attach and release periodically over the course of flow, an effect that persisted through day 14. In samples reconstructed with Fg-DP, no microaggregates were observed during storage, although the density and size of thrombi diminished over time. In filtered whole blood samples, thrombus formation on days 3 and 7 more closely resembled the Day 0 fresh samples, but aggregates appeared on day 14 despite filtration. Discussion: WB contains all of the elements required for resuscitation after hemorrhage, however the platelet storage lesion may affect its function. The interaction of platelets and fibrinogen in a relatively static environment results in activation and aggregation of platelets. In apheresis units, studies have shown that using a platelet additive solution to dilute fibrinogen results in better platelet performance for longer periods of storage. Further study is required to determine the clinical significance of aggregate formation and whether mitigation strategies should be explored. Disclosures No relevant conflicts of interest to declare.

APA, Harvard, Vancouver, ISO, and other styles

18

NAKAJIMA, Katsumi, Takako YAMASHITA, Yuki TOJI, and Kazuhiro SETO. "910 Microstructure formationof DP steel simulated by phase field method." Proceedings of The Computational Mechanics Conference 2010.23 (2010): 109–10. http://dx.doi.org/10.1299/jsmecmd.2010.23.109.

Full text

APA, Harvard, Vancouver, ISO, and other styles

19

Medina, Matías, and Sebastián Pastor. "Bone Tools at the Late Pre-Hispanic Site Boyo Paso 2 (Sierras of Córdoba, Argentina)." Documenta Praehistorica 48 (June 1, 2021): 2–19. http://dx.doi.org/10.4312/dp.48.4.

Full text

Abstract:

The aim of the article is to assess the role played by bone tools at Boyo Paso 2 (Sierras of Córdoba, Argentina), an open-air site interpreted as a basecamp seasonally occupied by mobile mixed foraging and farming people c. 900–700 years BP. The results suggest that diverse activities were carried out on-site, including hunting or warfare, tool production, food processing and rituals. Bone tool analysis may enable reconstruction of the technological level, social organization, and cultural attitude towards the environment among people neither wholly foragers nor wholly farmers, a category for which archaeology currently lacks sufficient archaeological understanding and that merits further research.

APA, Harvard, Vancouver, ISO, and other styles

20

Arboledas-Martínez, Luis, and Eva Alarcón-García. "Redefining the role of metal production during the Bronze Age of south-eastern Iberia. The mines of eastern Sierra Morena." Documenta Praehistorica 45 (December 29, 2018): 138–53. http://dx.doi.org/10.4312/dp.45.11.

Full text

Abstract:

Researchers have traditionally paid little attention to mining by Bronze Age communities in the south-east of the Iberian Peninsula. This has changed recently due to the identification of new mineral exploitations from this period during the archaeo-mining surveys carried out in the Rumblar and Jándula valleys in the Sierra Morena Mountains between 2009-2014, as well as the excavation of the José Martín Palacios mine (Baños de la Encina, Jaén). The analysis of the archaeological evidence and the archaeometric results reveal the importance of mining and metallurgical activities undertaken by the communities that inhabited the region between 2200 and 900 cal. BC, when it became one of the most important copper and silver production centers during the Late Prehistory of south-eastern Iberia.

APA, Harvard, Vancouver, ISO, and other styles

21

Zhu, Xiao Ling, Zhi Jun Wang, and Pan Chen. "The Data Planning Methodology Researching on the Construction of Nuclear Plant Engineering." Advanced Materials Research 986-987 (July 2014): 593–96. http://dx.doi.org/10.4028/www.scientific.net/amr.986-987.593.

Full text

Abstract:

Data plays more and more important roles in the AEC field, especially in Nuclear power plant constructing and engineering. In this paper, except introduce the basic DP theory and methodology, we analyzed the key points while doing the DP in nuclear power plant. Based on the analyzed results, which is an actuality of Nuclear power engineering, the paper proposed the ways to improve the data integration solution to standardize the data of project data, reduce the redundant data in the database and improve the system integration efficiency.

APA, Harvard, Vancouver, ISO, and other styles

22

Blanco-González, Antonio, Cristina Alario García, and Carlos Macarro Alcalde. "The earliest villages in Iron Age Iberia (800–400 BC): a view from Cerro de San Vicente (Salamanca, Spain)." Documenta Praehistorica 44 (January 4, 2018): 386. http://dx.doi.org/10.4312/dp.24.

Full text

Abstract:

The onset of the Iron Age underwent manifold disruptions. The emergence of long-lasting nucleated villages in Iberia c. 900/800 BC best encapsulates such profound changes. This paper draws on the results of excavations over the last few decades at a fortified tell-like settlement in central Iberia: Cerro de San Vicente (Spain). The article focuses on formation dynamics in earth architecture to understand the role of cultural choices in the genesis of these sites. The occurrence of sophisticated lifestyles and novel cultural expressions in this village (avant-garde devices such as a drain pipe, unprecedented building techniques, exotic imports and alien practices) suggests the plausible role of inter-regional migration in their adoption. The appraisal of intra-site spatial arrangements sheds fresh light upon the diachronic social trajectories of these agrarian communities, from a seemingly egalitarian organisation to an increasingly ranked one.

APA, Harvard, Vancouver, ISO, and other styles

23

Blanco-González, Antonio, Cristina Alario García, and Carlos Macarro Alcalde. "The Earliest villages in Iron Age Iberia (800–400 BC): a view from Cerro de San Vicente (Salamanca, Spain)." Documenta Praehistorica 44 (January 4, 2018): 386–401. http://dx.doi.org/10.4312/dp.44.24.

Full text

Abstract:

The onset of the Iron Age underwent manifold disruptions. The emergence of long-lasting nucleated villages in Iberia c. 900/800 BC best encapsulates such profound changes. This paper draws on the results of excavations over the last few decades at a fortified tell-like settlement in central Iberia: Cerro de San Vicente (Spain). The article focuses on formation dynamics in earth architecture to understand the role of cultural choices in the genesis of these sites. The occurrence of sophisticated lifestyles and novel cultural expressions in this village (avant-garde devices such as a drain pipe, unprecedented building techniques, exotic imports and alien practices) suggests the plausible role of inter-regional migration in their adoption. The appraisal of intra-site spatial arrangements sheds fresh light upon the diachronic social trajectories of these agrarian communities, from a seemingly egalitarian organisation to an increasingly ranked one.

APA, Harvard, Vancouver, ISO, and other styles

24

Abdo, Hany S., Asiful H. Seikh, Biplab Baran Mandal, Jabair A. Mohammed, Sameh A. Ragab, and Mohamed S. Abdo. "Microstructural Characterization and Corrosion-Resistance Behavior of Dual-Phase Steels Compared to Conventional Rebar." Crystals 10, no. 11 (November 23, 2020): 1068. http://dx.doi.org/10.3390/cryst10111068.

Full text

Abstract:

Dual-phase (DP) steels consist of a ferritic matrix dispersed with some percentage of martensite, which gives the material a good combination of strength and ductility, along with the capacity to absorb energy and enhanced corrosion protection properties. The purpose of this work was to study the microstructural and corrosion behavior (mainly pitting and galvanic corrosion) of DP steel compared with that of conventional rebar. To obtain DP steel, low-carbon steels were heat-treated at 950 °C for 1 h and then intercritically annealed at 771 °C for 75 min, followed by quenching in ice-brine water. The corrosion rates of DP steel and standard rebar were then measured in different pore solutions. Macro- and microhardness tests were performed for both steels. It was found that DP steels exhibited a superior corrosion resistance and strength compared to standard rebar. The reported results show that DP steels are a good candidate for concrete reinforcement, especially in aggressive and corrosive environments.

APA, Harvard, Vancouver, ISO, and other styles

25

Zhushchikhovskaya, Irina. "Jomon pottery: cord-imitating decoration." Documenta Praehistorica 34 (December 31, 2007): 21–29. http://dx.doi.org/10.4312/dp.34.3.

Full text

Abstract:

The paper discusses the decoration of pottery of the Neolithic Jomon culture (Japanese Archipelago, 13600–900 BC). The comb-impressed pattern produced by various kinds of cord or rope stamps is considered as the ‘calling card’ of Jomon pottery from the earliest cultural periods to the latest. Another kind of decoration recognized recently uses the cord not as a patterning tool, but as an essential motif of decorative composition. High relief elements imitate cordage forms and structures – knots, loops, hanging cord, net, etc. This kind of decoration corresponds to the pottery of Mid-dle Jomon period (3500–2500 BC) sites located in northern and north-eastern Honshu and southern Hokkaido. It is supposed that the introduction of images of real material object into the field of decorative art was reasoned by the meaning of cord and cordage as cultural signs during the Middle Jomon period. Interesting parallels to some cordage structures reconstructed on Middle Jomon pottery decoration are well known in traditional Japanese culture of VI–XX cc. Analytical interpretation of this resemblance may became the subject of special research.

APA, Harvard, Vancouver, ISO, and other styles

26

Pal, Tapan Kumar, and Kaushik Bhowmick. "Resistance Spot Welding Characteristics and High Cycle Fatigue Behavior of DP 780 Steel Sheet." Journal of Materials Engineering and Performance 21, no. 2 (February 11, 2011): 280–85. http://dx.doi.org/10.1007/s11665-011-9850-2.

Full text

APA, Harvard, Vancouver, ISO, and other styles

27

Yager, Jenna Lynn, Ryan Patrick Coyle, Stacey Summer Coleman, Lucas Ellison, Jia-Hua Zheng, Lane Bushman, Edward Michael Gardner, et al. "Moderately High Tenofovir Diphosphate in Dried Blood Spots Indicates Drug Resistance in Viremic Persons Living with HIV." Journal of the International Association of Providers of AIDS Care (JIAPAC) 18 (January 1, 2019): 232595821988845. http://dx.doi.org/10.1177/2325958219888457.

Full text

Abstract:

Background: Tenofovir diphosphate (TFV-DP) in dried blood spots (DBS) is a strong predictor of viral suppression in persons living with HIV (PLWH). Its association with antiretroviral therapy (ART) resistance remains unknown. Methods: Blood was collected in PLWH receiving TDF-containing ART enrolled in a 48-week study. Tenofovir diphosphate/emtricitabine triphosphate (FTC-TP) were quantified from the same sample as HIV viral load (VL) in PLWH who developed resistance within ≤12 months. Results: The study enrolled 807 participants, of whom 10 had new resistance-conferring mutations. Among these, median (interquartile range) TFV-DP and HIV VL were 956 (407-1510) fmol/punch and 9840 (513-68,200) copies/mL, respectively. Five had quantifiable FTC-TP in DBS. Based on previously published data, a TFV-DP concentration of 956 fmol/punch would have an adjusted odds of virologic suppression of 32.8 versus TFV-DP <350 fmol/punch, making viremia of ∼10,000 copies/mL an unexpected outcome. Conclusion: Moderately high TFV-DP in DBS (700-1249 fmol/punch) in PLWH with high viremia suggest that antiretroviral drug resistance might be present.

APA, Harvard, Vancouver, ISO, and other styles

28

Sisodia, Raghawendra, Marcell Gáspár, and Noureddine Guellouh. "HAZ Characterization of Automotive DP Steels by Physical Simulation." International Journal of Engineering and Management Sciences 4, no. 1 (March 3, 2019): 478–87. http://dx.doi.org/10.21791/ijems.2019.1.59.

Full text

Abstract:

DP steels were extensively used in the vehicles industry due to its extraordinary combined properties of strength, ductility, formability and weldability which contributed great significance in reducing strength to weight ratio and CO2 emission. High strength steel i.e. DP steels (3 different grades) were experimentally investigated and thermophysically simulated using Gleeble 3500 simulator to determine softening and hardening in heat affected zone. Samples were heated to different peak temperatures (1350 °C, 950 °C, 775 °C and 650 °C), two cooling time (t8.5/5 = 5 s and 30 s) and Rykalin 2D model were selected. The hardness and microstructure of the specimens were tested and analysed. For longer cooling time (t8.5/5= 30 s), we observed that softening occurs in all grade of investigated DP steels to all sub-regions. But for shorter cooling time i.e. t8.5/5= 5 s the softening is higher in intercritical HAZ compared to other sub-regions for all the types of DP steel with short cooling time (t8.5/5 = 5 s). However, the hardening zone in the CGHAZ occurs when Tmax is 1350 ºC for DP600, DP800 & DP1000 steels but it is more prominent in DP800 as compared to others two steel grade.

APA, Harvard, Vancouver, ISO, and other styles

29

Arboledas-Martínez, Luis, and Eva Alarcón-García. "Redefining the role of metal production during the Bronze Age of south-eastern Iberia. The mines of eastern Sierra Morena." Documenta Praehistorica 45 (January 3, 2019): 138–53. http://dx.doi.org/10.4312/dp.45-11.

Full text

Abstract:

Researchers have traditionally paid little attention to mining by Bronze Age communities in the south-east of the Iberian Peninsula. This has changed recently due to the identification of new mineral exploitations from this period during the archaeo-mining surveys carried out in the Rumblar and Jándula valleys in the Sierra Morena Mountains between 2009-2014, as well as the excavation of the José Martín Palacios mine (Baños de la Encina, Jaén). The analysis of the archaeological evidence and the archaeometric results reveal the importance of mining and metallurgical activities undertaken by the communities that inhabited the region between 2200 and 900 cal. BC, when it became one of the most important copper and silver production centers during the Late Prehistory of south-eastern Iberia.

APA, Harvard, Vancouver, ISO, and other styles

30

Terekhin, Arkadiy, Vladimir Ladygin, Yuriy Gurchin, Alexander Isupov, Marian Janek, Anatoliy Khrenov, Aleksey Kurilkin, et al. "The differential cross section for the dp-elastic scattering at 500 to 900 MeV/nucleon." EPJ Web of Conferences 138 (2017): 03012. http://dx.doi.org/10.1051/epjconf/201713803012.

Full text

APA, Harvard, Vancouver, ISO, and other styles

31

Cerpa, Arisbel, and Francisco José Alguacil. "Separation of cobalt and nickel from acidic sulfate solutions using mixtures of di(2-ethylhexyl)phosphoric acid(DP-8R) and hydroxyoxime(ACORGA M5640)." Journal of Chemical Technology & Biotechnology 79, no. 5 (April 7, 2004): 455–60. http://dx.doi.org/10.1002/jctb.960.

Full text

APA, Harvard, Vancouver, ISO, and other styles

32

Villa Nova, Fabio Antonio, Gláucia Maria Bovi Ambrosano, Stela Márcia Pereira, Antonio Carlos Pereira, and Marcelo de Castro Meneghin. "Associação do risco familiar com saúde bucal, qualidade de vida e variáveis socioeconômicas." Revista Brasileira de Medicina de Família e Comunidade 10, no. 34 (March 31, 2015): 1–9. http://dx.doi.org/10.5712/rbmfc10(34)970.

Full text

Abstract:

Objetivo: avaliar a relação do risco familiar com saúde bucal, qualidade de vida e variáveis socioeconômicas. Métodos: estudo observacional transversal com 311 indivíduos com idade entre 18 e 71 anos, residentes na área de abrangência de quatro unidades de saúde da família (USF), localizadas em dois municípios do estado de São Paulo. Os voluntários foram avaliados de acordo com: (1) situação clínica (CPO-D e necessidade de tratamento), (2) autopercepção de saúde bucal (OHIP-14), (3) qualidade de vida (WHOQOL-BREF), e (4) condição socioeconômica. Para avaliar o risco familiar, utilizou-se a Escala de Coelho. Os dados foram analisados por meio de modelo multinível formado por componentes fixos (representados pelas variáveis estudadas) e componentes aleatórios (representados pelos bairros e pelas variâncias nos diferentes níveis). Resultados: a média de idade dos participantes foi de 36,7 anos (dp=13), com CPO-D médio de 12,9 (dp=7,0). A média da Escala de Risco de Coelho entre os voluntários foi de 2,67 com erro padrão de 0,32. Apresentaram maior escore de risco total os indivíduos de maior idade (p=0,0486), que moravam em casas com mais residentes (p<0,001), com menos anos de escolaridade (p=0,0137), que não possuíam automóvel (p=0,0048) e com maior escore de OHIP-14 (p=0,0130). Conclusão: a escala de risco familiar associou-se positivamente às variáveis socioeconômicas, e os indivíduos com maior risco familiar apresentaram pior autopercepção da saúde bucal, mas não percebiam uma pior qualidade de vida em geral.

APA, Harvard, Vancouver, ISO, and other styles

33

Peng, Zhangchuan, Chun Liu, Lin Zhang, Wei Li, Wenbo Hu, Sanyuan Ma, and Qingyou Xia. "A Simple Method for the Cross-Section Area Determination of Single Profiled Fibers and Its Application." Microscopy and Microanalysis 24, no. 1 (January 30, 2018): 17–28. http://dx.doi.org/10.1017/s1431927618000028.

Full text

Abstract:

AbstractOne of the critical prerequisites for accurately measuring the mechanical properties of profiled fibers is the precise determination of their cross-sectional areas (CSAs). In this study, a new method is established for determining a single profiled fibers’ CSA based on the frozen section method and digital photo, pixel-ratio method (FS-DP). FS-DP is used to obtain a transverse section of a fiber, by acquiring an image of the cross section using optical microscopy or scanning electron microscopy, and then calculating the CSA using Photoshop. Using FS-DP, it was found that the shape of a fiber of silk changes little in a range of 50 μm, but varies considerably over a range of 1 m, while the CSA of cocoon silk (900 m) first increases and then decreases. Mechanical property tests showed that the elongation, strength, elastic modulus, and toughness values of the cocoon silk are consistent with those reported previously. Additionally, FS-DP was also used to observe other profiled fibers. The application tests indicated that FS-DP can be used to quickly and accurately obtain the CSA of a single profiled fiber, and that it is suitable for the large-scale determination and analysis of the mechanical properties of profiled fibers.

APA, Harvard, Vancouver, ISO, and other styles

34

Fernández-Carmona, J., I. Alqedra, C. Cervera, J. Moya, and J. J. Pascual. "Effect of lucerne-based diets on performance of reproductive rabbit does at two temperatures." Animal Science 76, no. 2 (April 2003): 283–95. http://dx.doi.org/10.1017/s1357729800053534.

Full text

Abstract:

AbstractNew Zealand × Californian rabbit does were offered ad libitum three diets: diet A, with 960 g lucerne per kg dry matter (DM), having 8•7 MJ digestible energy (DE) and 108 g digestible protein (DP) per kg DM; diet AF with 920 g lucerne and 50 g animal fat per kg DM, having 9•6 MJ DE and 105 g DP per kg DM; and diet C, as a control diet having 12•0 MJ DE and 122 g DP per kg DM. Productive parameters were measured for the first five parities, and food intake and milk yield during the first two parities.In experiment 1, 79 does (342 parities) were housed in a cooled building, litters were standardized to eight kits and weaned at 28 days of age. DM intake during lactation was lower (P < 0•001) but DE intake, milk yield and litter growth were higher for group C. Values for does on diet AF generally were between those of groups A and C. Average results for groups A, AF and C were respectively: 59, 65 and 51 days for the parturition interval; 160, 170 and 193 g for daily milk output in the first two lactations; 3•7, 4•0 and 4•5 kg for litter weight at weaning.In experiment 2, 64 does (294 parities) were housed in a climatic chamber at a constant temperature of 30oC, litters were standardized to six kits and weaned at 35 days of age. DM intake during lactation was lower (P < 0•001) but milk yield and litter growth were higher (P < 0•001) for C does. Average results for groups A, AF and C were respectively: 70, 70 and 56 days for parturition interval; 106, 128 and 128 g for daily milk output in the first two lactations; 3•7, 4•4 and 4•4 kg for litter weight at weaning. Lucerne-based diets allowed a reasonable performance of reproductive rabbit does in the long term, even under hot conditions.

APA, Harvard, Vancouver, ISO, and other styles

35

Soccol, Olívio José, Mario Nestor Ullmann, and José Antônio Frizzone. "Performance analysis of a trickle irrigation subunit installed in an apple orchard." Brazilian Archives of Biology and Technology 45, no. 4 (December 2002): 525–30. http://dx.doi.org/10.1590/s1516-89132002000600017.

Full text

Abstract:

Studies were carried out to evaluate the "xique-xique" irrigation system of a trickle irrigated subunit. Initial results showed that the system's performance was average, any Emission Uniformity, Statistical Uniformity and Coefficient of Global Variation were 74.51, 77.69, and 22.31%, respectively. The efficiency parameters were below expectations, and values of Application Efficiency (Ae), Storage Efficiency (Se), Deep Percolation (Dp), Deficit Degree (DD) and Adequacy Degree (a) were 100, 47.83, 0, 52.17 and 0% respectively. By adopting new management procedures, it was possible to improve the system's efficiency, reaching values of 90.20, 91.68, 9.80, 8.32 and 52.87% for Ae, Se, Dp, DD and "a", respectively.

APA, Harvard, Vancouver, ISO, and other styles

36

Vezzosi, Delphine, Catherine Cardot-Bauters, Nicolas Bouscaren, Maëlle Lebras, Mireille Bertholon-Grégoire, Patricia Niccoli, Nathalie Levy-Bohbot, et al. "Long-term results of the surgical management of insulinoma patients with MEN1: a Groupe d'étude des Tumeurs Endocrines (GTE) retrospective study." European Journal of Endocrinology 172, no. 3 (March 2015): 309–19. http://dx.doi.org/10.1530/eje-14-0878.

Full text

Abstract:

ObjectiveManagement of insulinomas in the context of MEN1 remains poorly studied. The aim of this study was to evaluate long-term results of various surgical approaches in a large cohort of insulinoma–MEN1 patients.Design and methodsConsecutive insulinoma–MEN1 patients operated on for a nonmetastatic insulinoma between 1957 and 2010 were retrospectively selected from the MEN1 database of the French Endocrine Tumor Group. The type of surgery was categorized as distal pancreatectomy (DP), total pancreatectomy/cephalic duodenopancreatectomy (TP/CDP), or enucleation (E). Primary endpoint was time until recurrence of hypoglycemia after initial surgery. Secondary endpoints were post-operative complications.ResultsThe study included 73 patients (median age=28 years). Surgical procedures were DP (n=46), TP/CDP (n=9), or E (n=18). After a median post-operative follow-up of 9.0 years (inter-quartile range (IQR): 2.5–16.5 years), 60/73 patients (82.2%) remained hypoglycemia free. E and TP/CDP were associated with a higher risk of recurrent hypoglycemia episodes (unadjusted hazard ratio: 6.18 ((95% CI: 1.54–24.8);P=0.010) for E vs DP and 9.51 ((95% CI: 1.85–48.8);P=0.007) for TP/CDP vs DP. After adjustment for International Union against Cancer pTNM classification, enucleation remained significantly associated with a higher probability of recurrence. Long-term complications had occurred in 20 (43.5%) patients with DP, five (55.6%) with TP/CDP, but in none of the patients who have undergone E (P=0.002).ConclusionIn the French Endocrine database, DP is associated with a lower risk for recurrent hypoglycemia episodes. Due to lower morbidity, E alone might be considered as an alternative.

APA, Harvard, Vancouver, ISO, and other styles

37

Buszman, Ewa, Dorota Wrześniok, Michał Otręba, and Artur Beberok. "The impact of ketoprofen on viability and melanization process in normal melanocytes HEMn-DP." Current Issues of Pharmacy and Medical Sciences 25, no. 4 (2012): 376–80. http://dx.doi.org/10.12923/j.2084-980x/25.4/a.07.

Full text

APA, Harvard, Vancouver, ISO, and other styles

38

Hilleshein, Eunice Fabiani, Luccas Melo de Souza, Liana Lautert, Adriana Aparecida Paz, Vanessa Menezes Catalan, Meíra Gonçalves Teixeira, and Déborah Bulegon Mello. "Capacidade para o trabalho de enfermeiros de um hospital universitário." Revista Gaúcha de Enfermagem 32, no. 3 (September 2011): 509–15. http://dx.doi.org/10.1590/s1983-14472011000300011.

Full text

Abstract:

Estudo transversal que avaliou o Índice de Capacidade para o Trabalho (ICT) e os aspectos sociodemográficos e laborais de 93 enfermeiros de um hospital universitário. Os dados foram coletados por questionário e analisados por estatística descritiva e analítica. A amostra foi predominantemente feminina (98,9%), com 41,7 (dp=9,0) anos de idade, 63,4% têm companheiro, dormem 6,9 (dp=1,3) horas por dia, 8,6% fumavam e 37,6% realizavam atividade física regular. O escore médio do ICT foi de 40,1 (dp=3,7), indicando boa capacidade para o trabalho. Houve correlações entre o ICT e idade (r=-0,22; p=0,0394); tempo de trabalho (r=-0,23; p=0,0295) e horas de sono (r=0,26; p=0,0162). Enfermeiros que vivem sozinhos e os não fumantes apresentaram médias superiores no ICT àqueles com companheiro e que fumam (41,3 e 39,6; 40,4 e 37,8; p=0,0476). Hábitos saudáveis de vida como dormir sete horas ou mais e não fumar associam-se positivamente com a capacidade para o trabalho.

APA, Harvard, Vancouver, ISO, and other styles

39

Hussein, T., A. Puustinen, P. P. Aalto, J. M. Mäkelä, K. Hämeri, and M. Kulmala. "Urban aerosol number size distributions." Atmospheric Chemistry and Physics Discussions 3, no. 5 (October 16, 2003): 5139–84. http://dx.doi.org/10.5194/acpd-3-5139-2003.

Full text

Abstract:

Abstract. Aerosol number size distributions were measured continuously in Helsinki, Finland from 5 May 1997 to 28 February 2003. The daily, monthly and annual patterns were investigated. The temporal variation of the particle number concentration was seen to follow the traffic density. The highest total particle number concentrations were usually observed during workdays; especially on Fridays, and the lower concentrations occurred during weekends; especially Sundays. Seasonally, the highest total number concentrations were usually observed during winter and spring and the lowest during June and July. More than 80\\% of the particle number size distributions were tri-modal: nucleation mode (Dp < 30 nm), Aitken mode (20–100 nm) and accumulation mode (Dp > 90 nm). Less than 20% of the particle number size distributions have either two modes or consisted of more than three modes. Two different measurement sites are used; in the first place (Siltavuori, 5 May 1997–5 March 2001), the overall means of the integrated particle number concentrations were 7100 cm−3, 6320 cm−3, and 960 cm−3, respectively, for nucleation, Aitken, and accumulation modes. In the second site (Kumpula, 6 March 2001–28 February 2003) they were 5670 cm−3, 4050 cm−3, and 900 cm−3. The total number concentration in nucleation and Aitken modes were usually significantly higher during weekdays than during weekends. The variations in accumulation mode were less pronounced. The smaller concentrations in Kumpula were mainly due to building construction and also slight overall decreasing trend during these years. During the site changing a period of simultaneous measurements over two weeks were performed showing nice correlation in both sites.

APA, Harvard, Vancouver, ISO, and other styles

40

Hocine, Tassi, Zidelmel Sami, and Allaoui Omar. "Effect of Martensite Morphologies on Corrosion in 5% H2SO4 Solution of Borided X70 Dual Phase Steel." Annales de Chimie - Science des Matériaux 45, no. 1 (February 28, 2021): 69–74. http://dx.doi.org/10.18280/acsm.450109.

Full text

Abstract:

In the present investigation, some electrochemical properties of dual phase X70 steels with different martensite morphologies which have undergone boriding were studied. To obtain a variety of martensite morphologies, Direct Quenching (DQ), Intermediate Quenching (IQ) and Step Quenching (SQ) heat treatments were applied at an intercritical annealing temperature (IAT) of 760℃. The treatment (DQ) allowed the formation of fine martensite evenly distributed in the ferrite matrix. (IQ) treatment showed the formation of martensite along the ferrite / ferrite grain boundaries. In contrast, treatment (SQ) induced the formation of a banded morphology of martensite and ferrite. The realization of borides on X70 (DP) steel was carried out in a powder mixture containing 5% of B4C as source of boron, 5% of NaBF4 as activator and 90% of SiC as diluent at 950℃ for a period of time from 4 h. The corrosion behavior of X70 (DP) steel has been explored by the Tafel extrapolation method in a 5 wt. % H2SO4 solution. The corrosion resistance of steel which has undergone boriding (BDP) is higher than that of steel which has not undergone it (DP).

APA, Harvard, Vancouver, ISO, and other styles

41

Terekhin, Arkady, Vladimir Ladygin, Yury Gurchin, Alexander Isupov, Marian Janek, Anatoliy Khrenov, Alexei Kurilkin, et al. "The differential cross section for dp-elastic scattering at 500-900 MeV/n and large transverse momenta." EPJ Web of Conferences 204 (2019): 10010. http://dx.doi.org/10.1051/epjconf/201920410010.

Full text

Abstract:

The results of the differential cross section of elastic dp-scattering measurements at 500, 750 and 900 MeV/n, performed at the Internal Target Station at the JINR Nuclotron are presented. The angular dependence is compared with the world experimental data at close energies as well as with the theoretical calculations performed within the framework of the relativistic multiple scattering theory. The differential cross section at fixed scattering angles covered a total c.m. energy range $\rad{}{s} = 3.1 - 3.42\,{\rm{GeV}}$ were obtained. The results are compared with the behavior of the world data.

APA, Harvard, Vancouver, ISO, and other styles

42

Šebek, Martin, Peter Horňak, Svätoboj Longauer, Peter Zimovčák, and Pavol Zahumenský. "Relationship of Microstructure and Mechanical Properties of Dual Phase Steel after Various Annealing Conditions." Materials Science Forum 891 (March 2017): 176–81. http://dx.doi.org/10.4028/www.scientific.net/msf.891.176.

Full text

Abstract:

The development of ultrafine ferrite grain size has become one of attractive way how to improve the behavior of dual phase (DP) steels. The other possible way how to enhance mechanical properties of DP steels is to modify the chemical composition. Therefore object of our investigation was the dual phase steel with modified alloying (three times higher Cr content with addition of phosphorus). The dual phase steel was annealed in laboratory conditions in accordance with three specified annealing cycles: into intercritical region (780°C), into austenite region (920°C) and into austenite region (920°C) by subsequently cooling into intercritical region (780°C) with the hold at the temperature of 495°C. The obtained microstructure after selected annealing regimes consists of three phases (ferritic matrix, martensite and martensite/bainite grains) with different size and distribution. For studied annealing regimes were clearly defined mechanical properties such as: YS, UTS, elongation, n-parameter and ratio YS/UTS. It was defined the scheme of microstructure evolution on base of austenite grain size during the continual cooling process with defined three phases: 1) the hard martensite formed on the grain boundary; 2) the soft interior bainite and 3) the hard isolated martensite.

APA, Harvard, Vancouver, ISO, and other styles

43

Fidyasari, Ambar, Rizky Mayang Sari, and Sentot Joko Raharjo. "Identifikasi Komponen Kimia pada Umbi Bentul (Colocasia esculenta (L.) Schoot) sebagai Pangan Fungsional." Amerta Nutrition 1, no. 1 (July 24, 2017): 14. http://dx.doi.org/10.20473/amnt.v1i1.2017.14-21.

Full text

Abstract:

Background: Nowadays tubers are mostly explored to determinetheir essential components. Colocasia esculenta (l.) Schottis one of tubers that its use has not been maximally explored. Objective: This research aims to identify the chemical components onColocasia esculenta (l.) Schott. Methods: The research stages include, first, the determination for finding out the right plant; second, the preparation and implementation (including theflour preparation andits proximate testing asthe carbohydrate, protein, fat, carbon, moisture and fiber testing); third, the flour extraction for obtaining the PLA and its PLA analysis using HPLC. Results: The result shows the chemical components of protein is 3.45%, fat is 0.31%, moisture is 6.07%, carbon is 2.14%, carbohydrate is 88.03%, and fiber is 2.87%. The yield extraction results are 2.9% and 9.0%. Conclusion: The flour extraction analysis displays polysaccharide proven by the presence of DP and DP5 of 72.356% and 87.98%. However,its sugar molecule composition has not been identified yet.ABSTRAK Latar belakang: Umbi-umbian saat ini mulai banyak dieksplorasi untuk mengetahui komponen penting yang terdapat dalam umbi tersebut. Umbi bentul salah satu umbi yang pemanfaatan belum dieksplorasi secara maksimal.Tujuan: dari penelitian ini adalah untuk mengetahui komponen kimia yang terdapat dalam bentul. Metode: Tahapan penelitian ini meliputi pertama, tahap determinasi untuk mengetahui kebenaran tanaman yang akan digunakan. Kedua, tahap persiapan serta pelaksanaan meliputi proses pembuatan tepung bentul, pengujian mutu kimia atau proksimat tepung meliputi karbohidrat, protein, lemak, kadar abu, kadar air dan serat. Ketiga, ekstraksi tepung untuk mendapatkan senyawa yang diduga PLA dan analisanya dengan menggunakan HPLC.Hasil: Berdasarkan penelitian menunjukkan hasil komponen kimia protein 3,45%, lemak 0,31%, air 6,07%, abu 2,14%, karbohidrat 88,03%, dan serat 2,87%. Rendemen hasil ekstraksi tepung yaitu 2,9% dan 9,0%.Kesimpulan : Analisa dari ekstrak tepung terbukti mengandung polisakarida dengan adanya DP dan DP5 memiliki total 72,356% dan 87,98% namun belum diketahui jenis gula penyusunnya.

APA, Harvard, Vancouver, ISO, and other styles

44

Fidyasari, Ambar, Rizky Mayang Sari, and Sentot Joko Raharjo. "Identifikasi Komponen Kimia pada Umbi Bentul (Colocasia esculenta (L.) Schoot) sebagai Pangan Fungsional." Amerta Nutrition 1, no. 1 (July 24, 2017): 14. http://dx.doi.org/10.20473/amnt.v1i1.5151.

Full text

Abstract:

Background: Nowadays tubers are mostly explored to determinetheir essential components. Colocasia esculenta (l.) Schottis one of tubers that its use has not been maximally explored. Objective: This research aims to identify the chemical components onColocasia esculenta (l.) Schott. Methods: The research stages include, first, the determination for finding out the right plant; second, the preparation and implementation (including theflour preparation andits proximate testing asthe carbohydrate, protein, fat, carbon, moisture and fiber testing); third, the flour extraction for obtaining the PLA and its PLA analysis using HPLC. Results: The result shows the chemical components of protein is 3.45%, fat is 0.31%, moisture is 6.07%, carbon is 2.14%, carbohydrate is 88.03%, and fiber is 2.87%. The yield extraction results are 2.9% and 9.0%. Conclusion: The flour extraction analysis displays polysaccharide proven by the presence of DP and DP5 of 72.356% and 87.98%. However,its sugar molecule composition has not been identified yet.ABSTRAK Latar belakang: Umbi-umbian saat ini mulai banyak dieksplorasi untuk mengetahui komponen penting yang terdapat dalam umbi tersebut. Umbi bentul salah satu umbi yang pemanfaatan belum dieksplorasi secara maksimal.Tujuan: dari penelitian ini adalah untuk mengetahui komponen kimia yang terdapat dalam bentul. Metode: Tahapan penelitian ini meliputi pertama, tahap determinasi untuk mengetahui kebenaran tanaman yang akan digunakan. Kedua, tahap persiapan serta pelaksanaan meliputi proses pembuatan tepung bentul, pengujian mutu kimia atau proksimat tepung meliputi karbohidrat, protein, lemak, kadar abu, kadar air dan serat. Ketiga, ekstraksi tepung untuk mendapatkan senyawa yang diduga PLA dan analisanya dengan menggunakan HPLC.Hasil: Berdasarkan penelitian menunjukkan hasil komponen kimia protein 3,45%, lemak 0,31%, air 6,07%, abu 2,14%, karbohidrat 88,03%, dan serat 2,87%. Rendemen hasil ekstraksi tepung yaitu 2,9% dan 9,0%.Kesimpulan : Analisa dari ekstrak tepung terbukti mengandung polisakarida dengan adanya DP dan DP5 memiliki total 72,356% dan 87,98% namun belum diketahui jenis gula penyusunnya.

APA, Harvard, Vancouver, ISO, and other styles

45

Depover, Tom, Ahmed Elmahdy, Florian Vercruysse, Patricia Verleysen, and Kim Verbeken. "Effect of strain rate on the hydrogen embrittlement of a DP steel." EPJ Web of Conferences 183 (2018): 03015. http://dx.doi.org/10.1051/epjconf/201818303015.

Full text

Abstract:

Advanced high strength steels (HSSs), such as dual phase steels, are widely used in the automotive industry due to their excellent combination of strength and ductility. In certain applications, they might be exposed to hydrogen (H) which is known to be detrimental for the deformation. H embrittlement (HE) is still not fully understood. It might drastically reduce the energy absorbed in a crash event and limits the use of HSSs in car bodies. Although H diffusion is a highly time dependent phenomenon, so far, the combined effect of dynamic strain rates and electrochemical H pre-charging has not been studied. Therefore, a reproducible methodology has been developed. Tensile specimens were electrochemically H pre-charged and immediately tested in a split Hopkinson tensile bar setup. To distinguish between the effect of strain rate and HE, static tests have been conducted using the same procedure. Results show that the HE resistance decreased due to higher H amounts in the sample for all strain rates. The HE increased when slower strain rates were applied due to higher probability of H to diffuse to regions of stress concentration ahead of a crack tip and as such accelerating failure. At the highest strain rate considered (900 s-1), the material still lost about 10% of its ductility.

APA, Harvard, Vancouver, ISO, and other styles

46

Baratta, Francesco, Daniele Pastori, Simona Bartimoccia, Vittoria Cammisotto, Nicholas Cocomello, Alessandra Colantoni, Cristina Nocella, et al. "Poor Adherence to Mediterranean Diet and Serum Lipopolysaccharide Are Associated with Oxidative Stress in Patients with Non-Alcoholic Fatty Liver Disease." Nutrients 12, no. 6 (June 10, 2020): 1732. http://dx.doi.org/10.3390/nu12061732.

Full text

Abstract:

Oxidative stress plays a pivotal role in non-alcoholic fatty liver disease (NAFLD). Factors inducing oxidative stress in NAFLD may be several; however, a relationship with the adherence to Mediterranean Diet (Med-diet) and with serum lipopolysaccharide (LPS) has been poorly investigated in this setting. The aim was to investigate factors associated with impaired oxidative stress in NAFLD, focusing on the potential role of LPS and Med-diet. We enrolled 238 consecutive outpatients from the PLINIO study, in whom we measured the soluble Nox2-derived peptide (sNox2-dp), a marker of systemic oxidative stress, and serum LPS. Adherence to Med-diet was investigated by a nine-item validated dietary questionnaire. Serum sNox2-dp and LPS were higher in patients with NAFLD compared to those without (25.0 vs. 9.0 pg/mL, p < 0.001 and 62.0 vs. 44.9 pg/mL, p < 0.001, respectively). In patients with NAFLD, the highest sNox2-dp tertile was associated with the top serum LPS tertile (Odds Ratio (OR): 4.71; p < 0.001), APRI > 0.7 (OR: 6.96; p = 0.005) and Med-diet-score > 6 (OR: 0.14; p = 0.026). Analyzing individual foods, the daily consumption of wine (OR: 0.29, p = 0.046) and the adequate weekly consumption of fish (OR: 0.32, p = 0.030) inversely correlated with the top sNox2-dp tertile. In conclusion, patients with NAFLD showed impaired oxidative stress. Levels of sNox2 correlated with serum LPS and with low adherence to Med-Diet.

APA, Harvard, Vancouver, ISO, and other styles

47

Jimi, S. I., J. L. Gras, S. T. Siems, and P. B. Krummel. "A short climatology of nanoparticles at the Cape Grim Baseline Air Pollution Station, Tasmania." Environmental Chemistry 4, no. 5 (2007): 301. http://dx.doi.org/10.1071/en07038.

Full text

Abstract:

Environmental context. Atmospheric particles play an important role in the global climate system; they contribute to the radiation balance directly, but they also have an indirect effect by modifying cloud properties and influencing precipitation. Over the Southern Ocean, nanometre-sized particle production is believed to be largely natural, although the processes that lead to these particles are not well understood. This work provides new observations of atmospheric nanoparticles, and shows that they arise from diverse sources of production. Abstract. This paper presents analyses of a two-year record of aerosol measurements made at the Cape Grim Baseline Air Pollution Station (CGBAPS) in Tasmania covering the period 1999 and 2000. The focus of the study is nanoparticles, defined here as particles with diameter Dp, in the range 3 ≤ Dp ≤ 12 nm; with the number concentration determined using two condensation particle counters, a TSI 3025 UCPC (Dp ≥ 3 nm) and a TSI CN3760 (Dp ≥ 12 nm). Total aerosol (Dp ≥ 3 nm) and nanoparticle concentrations were examined for three broad air mass origins, namely ‘Baseline’ or background maritime, continental Australia and Tasmanian air masses. Total median aerosol concentrations in the Baseline, continental and Tasmanian sectors typically ranged from 100 to 900, 1300 to 1900 and 500 to 1200 cm–3, respectively. The median ranges for the nanoparticle concentrations were 50–350 cm–3 in Baseline air, 150–450 cm–3 in continental air and 100–300 cm–3 in Tasmanian air. While the total aerosol concentrations in the three sectors were quite different, the nanoparticle concentrations were less so. Nanoparticle diurnal concentrations showed substantial differences between the three sectors, indicative of different aerosol sources or precursor sources in the regions designated by these wind sectors.

APA, Harvard, Vancouver, ISO, and other styles

48

Ye, Hao, Yan Hou, Hong Yu Wang, and Wen Long Cai. "Design of Control System for Oil and Gas Field Pipe Production Line." Advanced Materials Research 986-987 (July 2014): 1319–22. http://dx.doi.org/10.4028/www.scientific.net/amr.986-987.1319.

Full text

Abstract:

Steel pipe for pipeline have to go through multiple procedure in the whole process, and steel pipe transportation problem exists between the various processes. According to the specific requirements of the workshop environment and control tasks, a new communication mode that use S7-300PLC as the control core, connect 8 DP substation, involve 1077 output and input dot was adopted in the whole system. In the automatic mode, requirements of the complex technological process were realized; shake hands work mode was adopted between the production; using the proximity switch completed the material length measurement; in the location of inconvenience sensor installation, adopted virtual sensor in positioning. The HMI software in PC was WinCC V7.0, and communicated with PLC by Ethernet.

APA, Harvard, Vancouver, ISO, and other styles

49

Suresh Babu, S., and K. Krishna Moorthy. "The formation and growth of ultrafine particles in two contrasting environments: a case study." Annales Geophysicae 32, no. 7 (July 22, 2014): 817–30. http://dx.doi.org/10.5194/angeo-32-817-2014.

Full text

Abstract:

Abstract. Formation of ultrafine particles and their subsequent growth have been examined during new particle formation (NPF) events in two contrasting environments under varying ambient conditions, one for a tropical semi-urban coastal station, Trivandrum, and the other for a high-altitude free-tropospheric Himalayan location, Hanle. At Trivandrum, NPF bursts took place in the late evening/night hours, whereas at Hanle the burst was a daytime event. During the nucleation period, the total number concentration reached levels as high as ~ 15 900 cm−3 at Trivandrum, whereas at Hanle, the total number concentration was ~ 2700 cm−3, indicating the abundant availability of precursors at Trivandrum and the pristine nature of Hanle. A sharp decrease was associated with NPF for the geometric mean diameter of the size distribution, and a large increase in the concentration of the particles in the nucleation regime (Dp < 25 nm). Once formed, these (secondary) aerosols grew from nucleation (diameter Dp < 25 nm) to Aitken (25 ≤ Dp ≤ 100 nm) regime and beyond, to the accumulation size regimes (100 ≤ Dp ≤ 1000 nm), with varying growth rates (GR) for the different size regimes at both the locations. A more rapid growth ~ 50 nm h−1 was observed at Trivandrum, in contrast to Hanle where the growth rate ranged from 0.1 to 20 nm h−1 for the transformation from the nucleation to accumulation – a size regime that can potentially act as cloud condensation nuclei (CCN). The faster coagulation led to lifetimes of < 1 h for nucleation mode particles.

APA, Harvard, Vancouver, ISO, and other styles

50

Tokarskyy, Oleksandr, and Mykhaylo Korda. "Influence of suspension liquid total solids on E. coli O157:H7 survival and transfer efficacy between green tomatoes and cardboard." Potravinarstvo Slovak Journal of Food Sciences 13, no. 1 (December 28, 2019): 941–49. http://dx.doi.org/10.5219/1210.

Full text

Abstract:

The objectives of this study were: a) to determine E. coli O157:H7 survival on tomatoes and cardboard squares post-drying, stored at 25 ºC in humidified environment for four days, in buffered peptone water (BPW), and 0.1% diluted peptone (DP); b) to determine pathogen transfer rates (0, 1.5, or 24-hours drying post-inoculation), from inoculated tomato surfaces to uninoculated cardboard squares and conversely; and c) to evaluate SystemSure Plus ATP luminometer for recognizing contamination on visibly soiled (BPW) or visible clean (DP) cardboard. In tomato inoculation studies, E. coli O157:H7 survived better on the fruit when the inoculum was prepared using DP as compared to BPW. The 1.5-hours post drying counts of 5.34 and 5.76 log10 CFU.mL-1 in the rinsate substantially declined to 1.45 and 1.17 log10 CFU.mL-1 on day four, for DP and BPW, respectively. In cardboard inoculation studies, E. coli O157:H7 persisted for four days, with 1.5-hours post-drying counts and day four counts of 4.53 (DP) and 2.55 log10 CFU.mL-1 (BPW), contrary to 3.81 (DP) and 1.92 log10 CFU.mL-1 (BPW). Under the first impression, the slower die-off of E. coli O157:H7 on cardboard questions the possibility of reusing cardboard boxes due to the potential for cross-contamination. In wet transfer (0 hour drying) trials, both tomato-to-cardboard and cardboard-to-tomato yielded 100% positive transfers irrespective of diluent type. Dry transfer (1.5-hours drying interval post inoculation) from tomato-to-cardboard were 100% positive, but no positives were noted when inoculated, dried cardboard was contacted to tomatoes, irrespective of diluent. Results of transfers with BPW as the diluent showed 100% positive transfer from 24-hours dry tomatoes-to-cardboard, as inoculation spots on the tomatoes remained moist due to hygroscopic nature of solutes in BPW. Conversely, only a 40% positive transfer rate was observed under the same conditions with DP as diluent. No positive transfers were recorded from 24-hours dry cardboard-to-tomatoes, irrespective of diluent type. Though E. coli O157:H7 survived better on the surface of cardboard compared to the surface of tomatoes on day four, the dry transfers were more efficient from tomatoes-to-cardboard than conversely, possibly due to smooth and hydrophobic properties of the tomato, and rough and porous surface of the cardboard. ATP luciferase UltrasnapTM swab test showed 9/9 “pass” results for sterile liquid DP and BPW, while 9/9 “fail” results were observed with liquid peptone and BPW contaminated at ca. 9.0 log10 CFU.mL-1 E. coli O157:H7. Cardboard squares treated and dried, with sterile DP, showed 8/9 “pass” ATP luciferase results, and 1/9 “warning”, while cardboard squares with contaminated DP showed 9/9 “fail” result. Cardboard squares treated and dried, with sterile BPW, showed 7/9 “pass” ATP luciferase results, and 2/9 “warning”, while cardboard squares with contaminated BPW showed 9/9 “fail” result. Luminometer can simplify detection of microbial load, as well as organic residues, helping to check cardboard boxes for cleanness.

APA, Harvard, Vancouver, ISO, and other styles

Journal articles on the topic 'DP 980'

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles