oalib

OALib Journal期刊

ISSN: 2333-9721

费用:99美元

投稿

匹配条件: “Garda” ,找到相关结果约35条。
列表显示的所有文章,均可免费获取
第1页/共35条
每页显示
Quimismo dos Minerais Máficos e óxidos em Diques Alcalinos e de Composi es Básicas a Intermediárias da Regi o Costeira entre S o Sebasti o e Ubatuba, Estado de S o Paulo
Gianna M. Garda,Benigno M. Garda
Geologia USP : Série Científica , 2001,
Abstract: Ao longo do litoral norte do Estado de S o Paulo, diques alcalinos e de composi es variando desde básicas a intermediáriasocorrem paralelamente aos lineamentos de dire o geral NE-SW do Complexo Costeiro precambriano. As composi es alcalinasv o desde lamprófiros picríticos, camptonitos, monchiquitos, biotita lamprófiros, tefritos a raros aln itos, enquanto aquelas básicasa intermediárias s o classificadas quimicamente como basaltos, traquibasaltos e traquiandesitos basálticos. Os diques alcalinos contêm olivinas de composi o forsterítica, com 72 < Fo < 88, exceto nas dos tefritos, em que 46 < Fo < 68. Os aln itos e biotita lamprófiros apresentam biotitas zonadas, caracterizadas pelo aumento de Fe e Al, comportamento variado do Ti e diminui o de Mg do núcleo (flogopítico) para a borda (biotítica). Para as biotitas dos demais lamprófiros e tefritos, Ti diminui com o aumento de Fe, enquanto naquelas dos diques de composi es básicas a intermediárias o comportamento é oposto, com aumento concomitante de Ti e Fe.Os diques alcalinos apresentam cromoespinélios zonados em que se observa diminui o de Al, Mg e Cr e aumento de Ti e Fe do centro para a borda. Os teores mais elevados de Al e Mg correspondem aos espinélios de Fe-Ti do aln ito. Nos demais lamprófiros, Al e Mg diminuem com o aumento de Fe nesses espinélios. Os teores de Al s o relativamente mais baixos e de Mg em geral nulos nos espinélios de Fe-Ti dos basaltos, traquibasaltos e traquiandesitos basálticos, que se caracterizam como titanomagnetitas. Apenas nessas rochas aparecem ilmenitas. Principalmente Mg e Al caracterizam o quimismo dos minerais máficos e óxidos dos diques alcalinos, enquanto Fe e Ticaracterizam esses minerais das rochas de composi es básicas a intermediárias. O aln ito e os biotita lamprófiros destacam-sepela afinidade carbonatítica, indicada, por exemplo, pela composi o dos piroxênios. Os demais lamprófiros e tefritos devem terevoluído de basaltos alcalinos, enquanto as rochas de dique de composi es básicas a intermediárias assemelham-se com asrochas basálticas da Bacia do Paraná.
A trust region method using subgradient for minimizing a nondifferentiable function
Garda?evi?-Filipovi? Milanka
Yugoslav Journal of Operations Research , 2009, DOI: 10.2298/yjor0902249g
Abstract: The minimization of a particular nondifferentiable function is considered. The first and second order necessary conditions are given. A trust region method for minimization of this form of the objective function is presented. The algorithm uses the subgradient instead of the gradient. It is proved that the sequence of points generated by the algorithm has an accumulation point which satisfies the first and second order necessary conditions.
Pravo na javno okupljanje u hrvatskom i komparativnom pravu
?or?e Garda?evi?
Zbornik Radova Pravnog Fakulteta u Splitu , 2011,
Abstract: Kao jedno od temeljnih prava i sloboda, pravo na javno okupljanje zajam eno je nizom me unarodno-pravnih dokumenata te nacionalnih ustava. U ovom se radu daje prikaz komparativnih na ina pravne regulacije toga prava u tri dr ave (Francuska, Sjedinjene Ameri ke Dr ave, Republika Hrvatska). Osnovna pitanja analize u tom su smislu: povezanost prava na javno okupljanje i mirni prosvjed sa slobodom izra avanja; problem prostora namijenjenog odr avanju javnog okupljanja; te ustavne mogu nosti njegovih ograni enja u pogledu zabrane, sprje avanja i prekida. Normativna postavka rada sadr ana je u tezi da su komparativna iskustva (barem na razini op ih kategorija analize) neposredno relevantna i za procjenu hrvatskog ustavnopravnog i zakonskog ure enja prava na javno okupljanje.
Quitosana reduz a severidade da antracnose e aumenta a atividade de glucanase em feijoeiro-comum
Di Piero, Robson Marcelo;Garda, Marcos Venicius;
Pesquisa Agropecuária Brasileira , 2008, DOI: 10.1590/S0100-204X2008000900004
Abstract: the objective of this work was to evaluate the effect of chitosan on common bean (phaseolus vulgaris) anthracnose. different concentrations of chitosan suspension were sprayed on plants at v3 stage, in greenhouse; plants were also infected with colletotrichum lindemuthianum. the concentration of 9 mg per plant reduced the anthracnose severity in more than 50%, without causing any toxic effect on bean plants. the protecting effect was local and more intense in a time interval of 4 days between treatment and inoculation. mycelium growth reduction and spore germination inhibition of c. lindemuthianum were observed, when chitosan was used at 1 mg ml-1 and 80 μg ml-1, respectively. chitosan increased the glucanase activity in bean leaves. chitosan presents antifungal properties against c. lindemuthianum, as well as potential to induce resistance on bean plants. therefore, the plant spraying with chitosan can be an alternative to control anthracnose.
Otimiza??o de metodologia para deriva??o de desoxinivalenol através de planejamento experimental
Garda, Jaqueline;Badiale-Furlong, Eliana;
Química Nova , 2008, DOI: 10.1590/S0100-40422008000200015
Abstract: the objective of this work was to optimize the derivatization reaction for determining deoxynivalenol (don) by gas chromatography employing an experimental planning procedure. the factors were: temperature, reaction time, catalyst and trifluoroacetic anhydride concentration. the relative peak areas were used to evaluated the effects. the best conditions for don derivatization were 200 μl tfaa and 18 mg sodium bicarbonate for 6 min at 74 oc for 7 to 21 μg of don. under these conditions, the detection limit was 1.4 μg of don.
Multicriteria optimization in a fuzzy environment: The fuzzy analytic hierarchy process
Garda?evi?-Filipovi? Milanka,?aleti? Dragan Z.
Yugoslav Journal of Operations Research , 2010, DOI: 10.2298/yjor1001071g
Abstract: In the paper the fuzzy extension of the Analytic Hierarchy Process (AHP) based on fuzzy numbers, and its application in solving a practical problem, are considered. The paper advocates the use of contradictory test to check the fuzzy user preferences during fuzzy AHP decision-making process. We also propose consistency check and deriving priorities from inconsistent fuzzy judgment matrices to be included in the process, in order to check if the fuzzy approach can be applied in the AHP for the problem considered. An aggregation of local priorities obtained at different levels into composite global priorities for the alternatives based on weighted-sum method is also discussed. The contradictory fuzzy judgment matrix is analyzed. Our theoretical consideration has been verified by an application of commercially available Super Decisions program (developed for solving multi-criteria optimization problems using AHP approach) on the problem previously treated in the literature. The obtained results are compared with those from the literature. The conclusions are given and the possibilities for further work in the field are pointed out.
Study on Global Warming and Fuel Conservation in Surat City
Neha Bansal, Hormaz Garda, Ghanshyam Padmani
National Journal of Community Medicine , 2010,
Abstract: The study reveals that though middle and upper middle class of people in Surat city are aware of global warming, contributory reasons and containment measures, yet remain insensitive in terms of practices. The paper points to the need to increase their collective consciousness and responsiveness to this issue through intense awareness campaigns and rallies to promote measures as pooling of vehicles, cycling, hybrid cars and efficient rapid public transport systems through institution of measures at individual, community and government levels to ameliorate hindrances to the adoption of environment friendly practices as reported in the observations.
A Review of the CMOS Buried Double Junction (BDJ) Photodetector and its Applications
Sylvain Feruglio,Guo-Neng Lu,Patrick Garda,Gabriel Vasilescu
Sensors , 2008, DOI: 10.3390/s8106566
Abstract: A CMOS Buried Double Junction PN (BDJ) photodetector consists of two vertically-stacked photodiodes. It can be operated as a photodiode with improved performance and wavelength-sensitive response. This paper presents a review of this device and its applications. The CMOS implementation and operating principle are firstly described. This includes the description of several key aspects directly related to the device performances, such as surface reflection, photon absorption and electron-hole pair generation, photocurrent and dark current generation, etc. SPICE modelling of the detector is then presented. Next, design and process considerations are proposed in order to improve the BDJ performance. Finally, several BDJ-detector-based image sensors provide a survey of their applications.
Kinetics of deoxynivalenol degradation by Aspergillus oryzae and Rhizopus oryzae in submerged fermentation
Garda-Buffon, Jaqueline;Badiale-Furlong, Eliana;
Journal of the Brazilian Chemical Society , 2010, DOI: 10.1590/S0103-50532010000400018
Abstract: the objective was to evaluate the capacity of aspergillus oryzae and rhizopus oryzae to degrade deoxynivalenol (don) during submerged fermentation. the submerged medium utilized was sterile distilled water with 1μg ml-1 don, added and inoculated with 4 × 106 spores ml-1 of the fungal species. sampling was performed every 48 h to 240 h. don analyses included residual mass, percentage and velocity of degradation. residual mass of don in the collected medium was extracted by liquid-liquid partition and quantified by gas chromatography through derivation with trifluoroacetic anhydride. the time required for the largest don degradation was 96 h and 240 h by aspergillus oryzae and rhizopus oryzae respectively, and degradation rate were 0.62 and 0.54 μg h-1, respectively. rhizopus oryzae caused the largest decrease in don at around 90% in 240 h, while aspergillus oryzae caused the most rapid degradation with a 74% reduction of don at 96 h.
Geochemistry of tourmalines associated with iron formation and quartz veins of the Morro da Pedra Preta Formation, Serra do Itaberaba Group (S?o Paulo, Brazil)
Garda, Gianna M.;Beljavskis, Paulo;Juliani, Caetano;Silva, Dailto;
Anais da Academia Brasileira de Ciências , 2003, DOI: 10.1590/S0001-37652003000200008
Abstract: tourmalines of intermediate schorl-dravite composition occur in iron formation (including metachert and tourmalinites), metasediments, calc-silicate and metabasic/intermediate rocks of the morro da pedra preta formation, a volcanic-sedimentary sequence of the serra do itaberaba group (northeast of s?o paulo city, southeastern brazil). the morro da pedra preta formation is crosscut by quartz veins that contain both intermediate schorl-dravite and an alkali-deficient, cr-(v-)bearing tourmaline, in which the occupancy of the x-site is ?0.51ca0.33na0.15, characterizing it as intermediate to foitite and magnesiofoitite end-members. mg# values for this tourmaline are higher than those for intermediate schorl-dravite. raman spectroscopy also confirms the presence of two groups of tourmalines. stable isotope data indicate sediment waters as fluid sources, rather than fluids from magmatic/post-magmatic sources. delta18o compositions for tourmalines, host metachert, and quartz veins are similar, showing that fluid equilibration occurred during crystallization of both quartz and tourmaline. syngenetic, intermediate schorl-dravite tourmalines were formed under submarine, sedimentary-exhalative conditions; amphibolite-grade metamorphism did not strongly affect their compositions. younger tourmalines of compositions intermediate to foitite and magnesiofoitite reflect the composition of the host rocks of quartz veins, due to fluid percolation along faults and fractures that caused leaching of cr (and v) and the crystallization of these alkali-deficient, cr-(v-)bearing tourmalines.
第1页/共35条
每页显示


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.