News Article | April 17, 2017
Reflex Photonics, a leader in optical interconnects for IFES, has extended the quality and performance of the SNAP12 product family up to 75G in both commercial and industrial grade (−40°C to 85°C). This improved performance can extend the life of existing EVOP system and improve the performance at no extra cost for airliner. These modules underwent extensive testing to meet requirements for harsh environments. The Reflex’s SNAP12 are 100% compatible with the industry standards. SNAP12 are 12 channel parallel optical modules with a standard chassis mount MPO interface. They are self-contained electrical-to-optical converters requiring no internal fiber management or handling. In addition, SNAP12 brings fault tolerance, reduces weight, and offers EMI/EMC and lightning tolerance over copper interconnects. Reflex Photonics also keeps improving the SNAP12 performance with the planned development of a 120G version.“ Note that Reflex Photonics representatives will be available for meetings at Aircraft Interior Expo in Hamburg Germany. Please go to our website to book appointments.
Paixao M.V.S.,IFES |
Lopes J.C.,Federal University of Espirito Santo |
Schmildt E.R.,Do Centro Universitario Norte do Espirito Santo |
Meneghelli C.M.,Undergrad student of Agronomy in IFES
Revista Brasileira de Fruticultura | Year: 2016
This study aimed to evaluate the potential of multi-stems in avocado seeds according to their mass as well as the adventitious rooting of multi-stem budding with or without the use of auxin. The research was carried out at the Vegetation House of Federal Institute of Espírito Santo, Campus Santa Teresa -ES, with seeds of different masses: <60 g, 61 to 80 g, 81 to 100 g and >100 g, in which each experimental unit was made of five seeds, distributed within five repetitions, under a completely randomized design. The seeds were put to germinate and the percentage number of emergence and multiple stems were evaluated. After 150 days, the following evaluations were carried out: survival of rooted cuttings; number of leaves; stem diameter; root length; root volume; root and shoot fresh mass; root and shoot dry mass; shoot height; absolute growth and shoot growth rate; shoot dry weight/root dry mass ratio; shoot height/stem diameter ratio; shoot height/root length and Dickson’s quality index ratio. Avocado seeds with mass over 100 g and between 81-100 g presented higher percentage of multiple stems. Rods over 20 cm that were not treated with IBA (indole-3-butyric acid) resulted on avocado plants of better quality. The use of IBA (2000 mg L-1) does not affect the rooting and growth of avocado’s multi-stem plants. © 2016, Sociedade Brasileira de Fruticultura. All rights reserved.
de Matos A.T.,Federal University of Viçosa |
de Gariglio H.A.A.,FEAM |
Lo Monaco P.A.V.,IFES
Revista Brasileira de Engenharia Agricola e Ambiental | Year: 2013
In order to evaluate the retardation factor, dispersion coefficient and diffusion-effluent curves of calcium, magnesium and potassium present in the vinasse, a laboratory experiment was conducted in soil columns of typical Distrophic Red Latosol (LVd), typical Eutroferric Red Latosol (LVef) and typical Distrophic Yellow Red Latosol (LVAd). The columns were connected to the Mariotte bottle containing distilled water and then the vials containing wastewater. The relative concentrations of the samples of the effluent corresponding to the respective pore volumes were used to obtain the experimental curves of the effluent for potassium, calcium and magnesium. To obtain the retardation factors (fR) and dispersion-diffusion coefficients (D) for the ions, the data of the effuent curves and the Disp 1.1 program were used. The highest values of fR were obtained for potassium in LVd, followed by calcium in the LVAd and lastly, the potassium in the LVAd. The lowest fR and D values for all studied ions were obtained in LVef. Magnesium showed the lowest values of fR and D in the three evaluated soils.
News Article | January 27, 2016
In the early fifties, before Richard Feynman famously seeded the concept of nanoscience in his 1959 talk “there’s plenty of room at the bottom” , and well before the concept of nanotechnology became popular in the late 80’s, a significant research effort was already underway into the fundamental nanoscience associated with high-field effects at surfaces and the resulting emission of ions and electrons . Born from this work, in 1955, field ion microscopy (FIM) became the first true atomic scale microscopy technique, allowing us to ‘see atoms’ for the very first time . The technique, invented by Erwin Müller in 1951 employed a specimen shaped into a sharp point, enabling it to act as a point projection field ion emitter. The specimen was cooled to 78K in the presence of He gas. This gas was adsorbed and subsequently field ionized and detected, with the distribution of detected atoms showing the arrangement of the specimen atoms at the surface of the tip. Sixty years on, this seminal work by Erwin Müller has spurred important and wide-ranging research, including many significant discoveries and inventions . Progressive field evaporated of surface atoms can be detected  and their positions reconstructed to create high-resolution 3D atom maps in a technique known as atom probe tomography , which has become an established microscopy technique. It’s use in materials characterisation has led to ground-breaking research including the first 3D images of segregation to dislocations , understanding the growth of nanowires , determining the kinetics of elemental steps of catalytic surface reactions , revealing precipitation pathways in important engineering alloys  and confirmation of the dating of the oldest minerals on earth , to name just a few examples. Other contributions from field-emission science include the development of the liquid metal ion source that now forms the basis of focused ion beam instruments , field electron emission from new forms of emitter  along with the sustained development of theory around high-field effects at surfaces . It is timely that we recognize these exceptional contributions. The International Field Emission Society (IFES) originally grew from pioneering research on high-field nanoscience, and supports the development and application of techniques and instruments based on these effects. It has hosted symposia since 1952 occurring every one to two years. In 2016, this conference, “Atom Probe Tomography & Microscopy (55th IFES)” will be held in Gyeongju, South Korea (June 12-17). At the event, the Steering Committee of the IFES (see note at end of this article for a list of members) is proud to award an inaugural round of “Fellows of the International Field Emission Society”, elected in recognition of eminence in the field of field emission, field ionization, and related phenomena. These individuals have been nominated and elected by their peers for outstanding research that has pushed the frontiers of knowledge in the field. Many have also undertaken distinguished service to the IFES. Those to be honored as IFES fellows in 2016 are listed below: Hans-Olof Andren, Chalmers University of Technology: For development of atom probe techniques, and for his use of atom probe instruments as materials science tools to study the detailed microstructure of primarily metallic materials. Didier Blavette, Université de Rouen: For unique contributions to atom probe field ion microscopy spanning the fundamental physics of the technique, instrumentation, and cutting-edge materials characterization. Alfred Cerezo, University of Oxford: For development of the position sensitive atom probe, which opened new dimensions and perspectives in both material science and instrumentation. Paul Cutler, The Pennsylvania State University: For working on theory of field electron and ion emission over more than 50 years, developing quantum mechanical models to explain and predict the behavior of field electron emitters. Richard Forbes, University of Surrey: For his many contributions to the growth of the theory and understanding of field electron and ion emission as well as his contributions to the society. Georgiy Fursey, St Petersburg University of Telecommunications: For wide-ranging, outstanding contributions to field electron emission science and technology, particularly explosive emission and emission from semiconductors. Robert Gomer, University of Chicago: For outstanding contributions to science, especially areas of field electron and ion emission and their application to problems in surface chemistry, and for public service. Kazuhiro Hono, National Institute for Materials Science: For key contributions to the growth of atom probe, developments in instrumentation, and broad utilization of the technique to impact the study of magnetic materials and precipitation hardening. Gary Kellogg, Retired: For fundamental technical contributions to laser-pulsed atom probe instrumentation and numerous aspects of surface and materials science, and for extraordinary service to the nanoscience community. Thomas Kelly, Cameca Inc.: For revolutionizing atom probe technology with the invention of the LEAP, and for service to the IFES community as President of the society. Hans-Juergen Kreuzer, Dalhousie University: Published more than 325 papers, 8 books, and 6 patents in the area of physics and chemistry of high electric fields. Norbert Kruse, Washington State University: For sustained contributions towards understanding chemical physics at materials surfaces and outstanding service to the high field nanoscience and atom probe communities. Allan Melmed, Retired: One of the most distinguished scientists of the IFES community, with a lifetime experience in field emission since his PhD thesis with the late EW Müller. Michael Miller, Retired: For seminal contributions in the development and application of atom probe tomography as demonstrated by his 600+ publications, service to the community, and impactful collaborations with numerous international scientists and engineers in their development and use of atom probe tomography. Marwan Mousa, Mu'tah University: For outstanding contributions to field emission science and for service to the society including organization of the 45th IFES. Osamu Nishikawa, Kanazawa Institute of Technology: For outstanding contributions to atom probe becoming a mainstream scientific instrument in hundreds of laboratories around the world. John Panitz, University New Mexico: As one of the inventors of the atom probe technique, John Panitz’ contributions and vision for the technique enabled its large acceptance in the international realm of materials characterization. Simon Ringer, The University of Sydney: For outstanding research in atom probe science, sustained IFES community service, including as Vice President and conference organiser and his role in training a new generation of field emission scientists. Guido Schmitz, University of Stuttgart: For his contribution to understanding diffusion and other atomic scale metallurgical processes studied using atom probe tomography. David Seidman, Northwestern University: Having advised more than 120 individuals and with 450+ publications, David Seidman's materials research based on APT and technique developments has laid a solid groundwork for atom probe groups worldwide. George Smith, University of Oxford: For more than 45 years of contributions and commitment to the field of atom probe field ion microscopy. Krystyna Stiller, Chalmers University of Technology: For fruitful use and development of atom probe techniques contributing to understanding of radiation damage, phase transformations, interfacial segregation and high temperature oxidation, and for promoting atom probe techniques. Lynwood Swanson, FEI: For outstanding scientific contributions to characterisation and development of field electron/ion emitters, and technical and managerial leadership of FEI Company in commercially developing these emitters and related instruments. Tien Tsong, Academia Sinica: For observation of the interaction between adsorbates on metal surfaces and for seminal research involving the use of a laser to promote thermal field evaporation. The Steering Committee of the IFES currently consists of:  Feynman RP. There's Plenty of Room at the Bottom. Engineering and Science 1960:22-36.  Cerezo A, Godfrey TJ, Smith GDW. Application of a position-sensitive detector to atom probe microanalysis. Review of Scientific Instruments 1988;59:862-6.  Perea DE, Hemesath ER, Schwalbach EJ, Lensch-Falk JL, Voorhees PW, Lauhon LJ. Direct measurement of dopant distribution in an individual vapour-liquid-solid nanowire. Nature Nanotechnology 2009;4:315-9.  Kruse N, Abend G, Block JH. The kinetics of adsorption and thermal desorption of NO on stepped Pt single crystal surfaces. The Journal of Chemical Physics 1988;88:1307-12.  Ringer SP, Hono K. Microstructural evolution and age hardening in aluminium alloys: atom probe field-ion microscopy and transmission electron microscopy studies. Materials Characterization 2000;44:101-31.  Valley JW, Cavosie AJ, Ushikubo T, Reinhard DA, Lawrence DF, Larson DJ, et al. Hadean age for a post-magma-ocean zircon confirmed by atom-probe tomography. Nature Geoscience 2014;7:219-23.  Li Z, Xu N, Kreuzer HJ. Coherent field emission image of graphene predicted with a microscopic theory. Physical Review B - Condensed Matter and Materials Physics 2012;85.  Forbes RG, Edgcombe CJ, Valdrè U. Some comments on models for field enhancement. Ultramicroscopy 2003;95:57-65.
Grillo F.F.,IFES |
Tenorio J.A.S.,University of Sao Paulo |
de Oliveira J.R.,IFES
Revista Escola de Minas | Year: 2013
The aim of this work was to study the iron oxides and zinc reduction of from Electric Arc Furnace Dusts (EAFD), added in the form of a briquette with high silicon content present in hot metal bath. The EAFD will be. This study has begun with the EAFD characterization by chemical analysis, particle size determination, X-ray diffraction (XRD), Scanning Electron Microscopy (SEM) and Energy Dispersive Spectroscopy (EDS) microanalysis. This study utilized a bench-scale equipment to melt the reactants. During this process, a flow rate of inert gas was kept above the bath. Bath samples were collected periodically and the total silicon content in the hot metal was determined by chemical analysis. Zinc oxide, zinc ferrite and other oxides were reduced, volatized and collected by a gas cleaning system (baghouse) located on top of the oven. It was possible to find peaks in the EDS with a composition of approximately 55.00 % zinc and reduction the FeO by silicon and carbon of hot metal.
Occurrence of Helicoverpa armigera (Lepidoptera: Noctuidae) on tomato in the Espírito Santo state [Ocorrência de Helicoverpa armigera (Lepidoptera: Noctuidae) em tomateiro no estado do Espírito Santo]
Pratissoli D.,UFES CCA |
Lima V.L.,IFES |
Pirovani V.D.,IFMG |
Horticultura Brasileira | Year: 2015
The species Helicoverpa armigera is one of the most important polyphagous and widely distributed pests in the world. Its occurrence was recently reported on soybean and cotton, in the states of Goiás, Mato Grosso and Bahia, Brazil. Tomato is also host species of H. armigera, among the 200 registered, being one of the most important crops in the Espírito Santo state. The production of tomatoes is fully dedicated for fresh consumption and the damage caused by H. armigera in fruits make unfeasible marketing. Therefore, this study aimed to record the occurrence of H. armigera in tomato crop in the Espírito Santo state. From February 2012 to October 2013, insects were collected from tomato plants in some producing areas. After insect identification, by dissection of the genitalia of adult moths, it was possible to confirm the occurrence of H. armigera on tomato crop in the Espírito Santo state. © 2015 Sociedade de Olericultura do Brasil. All rights reserved.
Diets with reduced crude protein, calcium and phosphorus levels with phytase and amino acids for broiler chickens [Rações com níveis reduzidos de proteína bruta, cálcio e fósforo com fitase e aminoácidos para frangos de corte]
Gomide E.M.,Federal University of Lavras |
Rodrigues P.B.,Brazilian National Council for Scientific and Technological Development |
Bertechini A.G.,Brazilian National Council for Scientific and Technological Development |
de Freitas R.T.F.,Brazilian National Council for Scientific and Technological Development |
And 4 more authors.
Revista Brasileira de Zootecnia | Year: 2011
In performance and metabolism trials, diets with reduced levels of crude protein, calcium and available phosphorus on the performance, carcass characteristics, tibia ashes, balance and retention of nitrogen and phosphorus of broiler chickens in phase from 8 to 21 and 8 to 35 days were evaluated. In each phase, 30 and 25 birds per experimental unit were used in the performance assay and five and three in the metabolism assay, respectively, in a completely randomized experimental design, with six replications. Treatments consisted of diet with 21% crude protein without phytase (control), formulated with nutritional levels recommended on the Brazilian tables, and diets with 21, 20, 19 and 18% crude protein with phytase (8 to 21 days) and from 8 to 35 days, the control diet had 20% crude protein without phytase (control), and others diets with 20, 19, 18, 17% crude protein, with phytase. In the diets with phytase (80 g of Ronozyme NP(M) phytase per ton of diet), the level of available phosphorus was reduced in 0.15 and the calcium in 0.30 percentage points in relation to the control diet. No effect was observed with the reduction of nutrients on feed intake, weight gain, or feed conversion in either phase or for the study of carcass characteristics to the 35 days. However, higher abdominal fat percentage was observed when the broilers were fed diet with lower protein level. The excretion of nitrogen and phosphorus decreased when birds received diets with reduced levels of these nutrients. Ash percentage in the tibia was not influenced by treatments. It is possible to reduce protein level, available phosphorus, and calcium of the diets in up to 3, 0.15 and 0.30 percentage points when the diets are supplemented with phytase and amino acids, respectively. © 2011 Sociedade Brasileira de Zootecnia.
Ramos M.J.M.,EMPAER MT |
Monnerat P.H.,UENF CCTA |
Revista Brasileira de Fruticultura | Year: 2013
The equipment Minolta SPAD-502 measures the intensity of green color of leaves and has been used in the quantification of chlorophyll, characterized by speed, simplicity, and especially by allowing a non-destructive evaluation of the leaf tissue. The objective of this study was to calibrate the SPAD reading and its correlation with the diagnosis of induced deficiencies of macronutrients and boron deficiencies involving the vegetative growth of the pineapple. The experiment consisted of eight treatments: complete, -N,-P, -K, -Ca, -Mg, -S and -B in randomized complete block with six replicates. It was evaluated the length and the width of the sheet "D" (marked) and readings taken with the SPAD 502 chlorophyll meter. The use of the method of indirect measurement of chlorophyll is suitable for assessing the nutritional status of N and vegetative growth of 'Imperial' pineapple. The value Spad and concentration of leaf N in the complete treatment are respectively: 75.7 and 14.8 g kg-1 and deficient in N: 36.6 and 9,7 g kg-1. With the exception of the deficiencies of N and P, the other treatments did not affect SPAD readings.
Influence of strontium concentration and waiting time in the modification of hypoeutectic Al-Si alloy [Influência da concentração de Sr e do tempo de espera na modificação de uma liga de Al-Si hipoeutética]
Coutinho P.H.,IFES |
65th ABM International Congress, 18th IFHTSE Congress and 1st TMS/ABM International Materials Congress 2010 | Year: 2010
The modification treatment in Al-Si alloys is very common in industry aiming to improve the yield point, tensile strength and ductility. This research aims some parameters involved in the modification with strontium like its concentration in the alloy and the waiting time before to tapping. The casting alloy A380 is one of the most used in the fabrication of parts, and samples were fused at a temperature of 700°C. After, was added 0.005, 0.02 e 0.07% of strontium and samples were taken at different waiting times. The results show that the silicon was modified with strontium successfully, except for additions less than 0.01%. Furthermore, at least nine successive fusions are possible using the alloy with 0.045% Sr without losing the effect of modification. For a waiting time of 40 minutes, the alloy remains modified but not totally. After studies, perceives a great influence of waiting time and concentration. Finally, there is an increase of porosity in the modified alloys.
Naciuk F.F.,University of Campinas |
Milan J.C.,University of Campinas |
Andreao A.,IFES |
Miranda P.C.M.L.,University of Campinas
Journal of Organic Chemistry | Year: 2013
Marine alkaloids caulibugulones A-D were synthesized in six steps starting from the readily available 2,5-dimethoxybenzaldehyde. Pomeranz-Fritsch reaction of N-(2,5-dimethoxybenzyl)-N-(2,2-dimethoxyethyl)-2-nitrobenzenesulfonamide proceeded smoothly to give 5,8-dimethoxyisoquinoline, which was oxidized to isoquinolinediones by a tunable oxidation reaction with N-haloimides. Therefore, NBS furnished direct conversion to the isoquinoline-5,8-dione; alternatively, N-haloimides of cyanuric acid provided both oxidation and halogenation generating 6,7-dihaloisoquinoline-5,8-diones. Aminolyses of these isoquinolinediones with methylamine or ethanolamine produced the isoquinolinedione alkaloids caulibugulones A-D in 24-57% overall yield. © 2013 American Chemical Society.