Results 51 to 60 of about 162,552 (303)
The effect of saturated pyrimidine bases on RNA conformation
FEBS Letters, 1972 Saturation of the pyrimidine bases in polynucleotides leads to pronounced changes in their biological activity. The template activity of copolymers of 5,6-dihydrouridine and uridine decreases with increasing 5,6-dihydrouridine content in an in vitro protein synthesizing system [l] and changes its coding properties in an RNA-polymerase system [2 ...
Swinehart, Janet +2 more
openaire +2 more sources
Revista Brasileira de Ciência do Solo, 2008 A recente mudança no sistema de cultivo do solo ocorrida no Brasil, passando do preparo convencional (PC) para o sistema plantio direto (SPD), altera o funcionamento do solo. No solo cultivado no SPD, as relações se estabelecem no tempo e são preservadas
Margarete Nicolodi +2 more
doaj +1 more source
Revista Brasileira de Ciência do Solo, 2008 O tempo de cultivo do solo no sistema plantio direto (SPD) altera a magnitude das relações entre os componentes da acidez do solo e o rendimento das culturas. Altos rendimentos podem ser obtidos nesse sistema mesmo em áreas com alta acidez.
Margarete Nicolodi +2 more
doaj +1 more source
Soil Systems, 2020 As acidic deposition has decreased across Eastern North America, forest soils at some sites are beginning to show reversal of soil acidification. However, the degree of recovery appears to vary and is not fully explained by deposition declines alone.
Paul Hazlett +5 more
doaj +1 more source
, 1959 9 pages, 5 tables, 10 references.The effect of base saturation of non-calcareous soils with sodium and calcium on their total labile phosphate was studied in solutions of sodium and calcium chlorides of the same ionic strength (micro= 0.02).
Arambarri, P. +2 more
core +1 more source
FEBS Letters, EarlyView.We reconstituted Synechocystis glycogen synthesis in vitro from purified enzymes and showed that two GlgA isoenzymes produce glycogen with different architectures: GlgA1 yields denser, highly branched glycogen, whereas GlgA2 synthesizes longer, less‐branched chains.
Kenric Lee +3 more
wiley +1 more source
Passivity-based control of saturated induction motors
IEEE Transactions on Industrial Electronics, 2001 A passivity-based controller, which takes into account saturation of the magnetic material in the main flux path of the induction motor, is developed to provide close tracking of time-varying speed and flux trajectories in the high magnetic saturation regions. The proposed passivity based controller is experimentally verified.
Levent U. Gökdere +2 more
openaire +2 more sources
Improved MPC Design based on Saturating Control Laws* [PDF]
European Journal of Control, 2003 This paper is concerned with the design of stabilizing model predictive control (MPC) laws for constrained linear systems. This is achieved by obtaining a suitable terminal cost and terminal constraint using a saturating control law as local controller.
Daniel Limón +3 more
openaire +4 more sources
INCREASING LEVELS OF BASE SATURATION AND INITIAL DEVELOPMENT OF TEAK IN AN OXISOL OF MEDIUM TEXTURE [PDF]
, 2012 http://dx.doi.org/10.5902/198050987551Teak is a forest species of high commercial value, but the little knowledge on the behavior of this species in relation to soil acidity is an important factor that may limit its cultivation. The aim of this study was
Backes, Clarice [UNESP] +11 more
core +2 more sources
Gut microbiome and aging—A dynamic interplay of microbes, metabolites, and the immune system
FEBS Letters, EarlyView.Age‐dependent shifts in microbial communities engender shifts in microbial metabolite profiles. These in turn drive shifts in barrier surface permeability of the gut and brain and induce immune activation. When paired with preexisting age‐related chronic inflammation this increases the risk of neuroinflammation and neurodegenerative diseases.
Aaron Mehl, Eran Blacher
wiley +1 more source