44,759 research outputs found
Adubação fosfatada corretiva para cultura do milho.
No full textO experimento foi conduzido durante três anos consecutivos, em condições de campo, em um Latossolo Vermelho distrófico argiloso, com o objetivo de verificar os efeitos da adubação fosfatada corretiva na produção de grãos de milho e em algumas características químicas do solo. Foram utilizadas seis doses de termofosfato magnesiano (0 – 180 – 270 – 360 – 450 – 540 kg ha-1 de P2O5), aplicadas no primeiro ano, a lanço com posterior incorporação com grade. Verificou-se que a adubação fosfatada corretiva promoveu incrementos significativos na produção de grãos de milho e nos teores de P no solo. De maneira geral, doses superiores a 270 kg ha-1 de P2O5 foram eficientes até o terceiro ano agrícola. Uma produção relativa de 90% esteve associada a uma concentração de P no solo ao redor de 15 mg dm-3 . A dose mais elevada de termofosfato promoveu, nos dois primeiros anos, um aumento significativo na saturação por bases, valor de pH e teores de Ca e Mg no sol
Informetrics on M. N. Srinivas
No full textM. N. Srinivas, the well known sociologist is widely recognised as architect of modern Indian sociology and social anthropology. His publications have been analysed by year, domain, authorship pattern, channels of communication used. Keywords, etc. The results indicate that the papers published by him are of a nature that qualify him to be a 'role model' for the younger generations to emulate.
By the end of 1995, Srinivas had to his credit 144 papers which, included 33 broad papers in sociology and anthropology; 18 papers in social change; 28 papers in village studies; 12 papers on religion; 17 papers on caste and 36 papers of general popular interest. The periods 1958-61 and 1974-77, when Srinivas was 38-41 and 58-61 years old. were his most productive periods with highest publication activity
Soil properties affecting phosphorus extraction from Portuguese soils by conventional and innovative methods
No full textIlluminaçao Apologetica do retrato de Morteçor en que aparecem com mais vivas côres os erros do author do novo Methodo, e seu Apologista ...
No full textFecha sacada de la pág.2 y 159Sign.: A-V\p4\sError tipográfico de signatura : a B\b2\s llama B\b3\
From the correspondence of M. P. Drahomanov: two unknown letters to M. V. Vodovozov of 1894
No full textThis publication introduces into scientific discourse little-known letters of prominent Ukrainian scholar, politician and publicist M. P. Drahomanov (1841-1895), discovered in the fond of V. I. Vernadsky in the Archive of the Russian Academy of Sciences in Moscow. Two letters written in the latest period of the life of M. P. Drahomanov, which are addressed to young economist and publicist Mykola Vasyliovych Vodovozov (1870-1896), expand the source base not only for M. P. Drahomanov’s biographers. They show his ties with Russian liberals, who later formed the core of the party of constitutional democrats. A preface to the publication contains a biography of M. V. Vodovozov, and the author makes a hypothesis on the history of an acquaintance of the correspondent and the addressee, which could be connected with M. V. Vodovozov’s brother, V. V. Vodovozov, and members of the “Shelter Fraternity”, and through them with M. P. Drahomanov. The analysis of the published letters proves that M. P. Drahomanov endeavored to widen through the “Shelter Fraternity” members his contacts with democratic circles in Russia, and also to find financial support for publishing letters of Bakunin and Struve
The effects of climate change on the hydrology and groundwater of Terceira island (Azores)
No full textUntil recently the water flowing from rain fed springs was abundant enough on Terceira
(Azores, Portugal) and groundwater exploration was limited to the Lajes basin. This
paper discusses the effects of climate change on the hydrology of Terceira and presents
an estimate of the size of the fresh water lens underneath the whole island of Terceira
using fault orientation as an indication for conductivity anisotropy. Longer periods of
drought are thought to be one of the effects of greenhouse warming for Terceira and
the exploration and exploitation of the freshwater lens may become necessary
Analysis of natural and disease-associated autoantibody repertoires: Anti-endothelial cell IgG autoantibody activity in the serum of healthy individuals and patients with systemic lupus erythematosus
No full textThe present study demonstrates that natural IgG with anti-endothelial cell activity is present in the serum of healthy individuals and in pooled normal human Ig. By using a novel method that allows for the simultaneous and quantitative assessment of reactivities of antibodies with a large number of antigens in tissues, we observed that natural anti-endothelial cell antibody (AECA) recognizes a restricted set of self antigens in endothelial cells that is conserved among healthy individuals. The extent to which natural AECA activity is expressed in serum and the pattern of reactivity of AECA with endothelial cell antigens showed little variability between individuals. Analysis of AECA in the serum of patients with systemic lupus erythematosus (SLE) revealed a higher amount of activity and a wider spectrum of antigentic specificities than that recognized by natural antibodies in endothelial cell extracts. AECA activity of IgG in whole serum was lower than that of purified IgG in the case of healthy individuals and showed little variation among individuals. in contrast, no difference was found between AECA activity of purified IgG and that of IgG in patients' serum, suggesting that SLE sera lack the factors that control expression of AECA activity in the serum of healthy individuals. Our results indicate that natural autoantibodies recognize a restricted and conserved set of self antigens. Our observations further suggest that defective regulation of the expressed autoreactive B cell repertoire is the basis for expansion of novel clonal specificities and enhanced autoantibody activity in serum of patients with autoimmune disease. © 1994 Oxford University Press
V. BRUSOV’S ARTICLE ON M. LOMONOSOV. INTRODUCTORY REMARKS BY IRINA ATAJANYAN (YEREVAN)
No full textThe author publishes V. Brusov’s paper «On Lomonosov». According to V. Brusov, M. Lomonosov is «the father of the Russian literature». Significantly, V. Brusov overlooked M. Lomonosov’s poetry, with a view towards his works on prosody. The publication’s author concludes that V. Brusov intended to write a research paper on M. Lomonosov’s life and creativity
Measurement of the polarization amplitudes and triple product asymmetries in the B0s → Φ Φ decay
No full text<p>Using 1.0 fb−1 of pp collision data collected at a centre-of-mass energy of s√=7 TeV with the LHCb detector, measurements of the polarization amplitudes, strong phase difference and triple product asymmetries in the B0s→ϕϕ decay mode are presented. The measured values are</p>
<p>|A0|2=0.365±0.022(stat)±0.012(syst),|A⊥|2=0.291±0.024(stat)±0.010(syst),cos(δ∥)=−0.844±0.068(stat)±0.029(syst),AU=−0.055±0.036(stat)±0.018(syst),AV=0.010±0.036(stat)±0.018(syst).</p>
The long-wavelength view of GG Tau A: rocks in the ring world
No full textWe present the first detection of GG Tau A at centimetre wavelengths, made with the Arcminute Microkelvin Imager Large Array at a frequency of 16 GHz (λ = 1.8 cm). The source is detected at >6 σrms with an integrated flux density of S16GHz = 249 ± 45 µJy. We use these new centimetre-wave data, in conjunction with additional measurements compiled from the literature, to investigate the long-wavelength tail of the dust emission from this unusual protoplanetary system. We use an MCMC-based method to determine maximum likelihood parameters for a simple parametric spectral model and consider the opacity and mass of the dust contributing to the microwave emission. We derive a dust mass of Md ~ 0.1 Msun, constrain the dimensions of the emitting region and find that the opacity index at λ > 7 mm is less than unity, implying a contribution to the dust population from grains exceeding ~4 cm in size. We suggest that this indicates coagulation within the GG Tau A system has proceeded to the point where dust grains have grown to the size of small rocks with dimensions of a few centimetres. Considering the relatively young age of the GG Tau association in combination with the low derived disc mass, we suggest that this system may provide a useful test case for rapid core accretion planet formation models
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