Artigos científicos, teses e dissertações
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OmpF and OmpC porins were differentially regulated by nutrient limitation and growth rate in glucose- or nitrogen-limited chemostat cultures of Escherichia coli. Transcriptional and translational ompF fusions showed a sharp peak of expression under glucose limitation at D = 0.3 h...

Candida utilis NCYC 321 was grown in steady-state culture in a chemostat under glucose limitation or NH4+ limitation at temperatures of 30, 25, 20, and 15 C and at dilution rates (equal to growth rates) in the range of 0.35 to 0.05 hr−1. Deoxyribonucleic acid contents of cells gr...

In the present work, the applicability of the concept of statute of limitation to the main codes of the Administrative law is addressed. As the statute of limitation manifests in both penal and non-penal domains, our objective was, at first, to construct a concept of limitation t...

The regulation of three Salmonella typhimurium phosphatases in reponse to different nutritional limitations has been studied. Two enzymes, an acid hexose phosphatase (EC 3.1.3.2) and a cyclic phosphodiesterase (EC 3.1.4.d), appear to be regulated by the cyclic adenosine 3' ,5'-mo...

Spirochaeta aurantia M1 cells were grown in a chemostat under conditions of energy and carbon source limitation. The chemotactic responses of the chemostat-grown cells were compared with those of S. aurantia cells grown in batch culture in the presence of excess energy and carbon...

The leucine operon of Salmonella typhimurium is controlled by a transcription attenuation mechanism. Four adjacent leucine codons within a 160-nucleotide leu leader RNA are thought to play a central role in this mechanism. Three of the four codons are CUA, a rarely used leucine c...

Glutamate enhances the yield of exotoxin A (ETA), which is induced by iron limitation, from Pseudomonas aeruginosa. We tested the possibility that glutamate affects growth during iron restriction. We confirmed that iron limitation caused early entry into stationary phase but had ...

Although theory and widespread evidence show that the evolution of egg size is driven primarily by offspring and maternal fitness demands, an additional explanation invokes sperm limitation as a selective force that could also influence egg size optima. Levitan proposed that cons...

In this study, the authors aimed to determine whether higher activity energy expenditure, assessed by using doubly labeled water, was associated with a reduced decline in mobility limitation among 248 older community-dwelling US adults aged 70–82 years enrolled in 1998–1999. Acti...

The influence of the growth rate on outer membrane protein composition and enterobactin production was studied with Klebsiella pneumoniae grown under conditions of iron limitation in chemostats. More enterobactin was produced at fast (D = 0.4 h-1) and slow (D = 0.1 h-1) growth ra...

To determine whether patients with chronic airflow limitation have a specific alteration in skeletal muscle performance, the strength and endurance of inspiratory and limb muscles were compared in 11 patients with chronic airflow limitation and 11 control subjects during maximal ...

The text is mainly related to limitation (the juridical institution through which a plaintiff, in view of his/her inerce through the term granted by the law, loses the exigibility as to a given right) along the enforcing phase of a judicial labor procedure. The lesion to rights a...

Slime production by most strains of Staphylococcus epidermidis was enhanced by conditions of iron limitation produced by the addition of ethylenediamine-di-o-hydroxyphenol acetic acid to the growth medium. The density of the biofilm which formed on the base of microtiter plates w...

The effect of pH, growth rate, phosphate and iron limitation, carbon monoxide, and carbon source on product formation by Clostridium pasteurianum was determined. Under phosphate limitation, glucose was fermented almost exclusively to acetate and butyrate independently of the pH a...

Styrene degradation in Pseudomonas putida CA-3 has previously been shown to be subject to catabolite repression in batch culture. We report here on the catabolite-repressing effects of succinate and glutamate and the effects of a limiting inorganic-nutrient concentration on the s...

In earlier studies, the pathway of toluene and m- and p-xylene degradation (TOL pathway) in Pseudomonas putida (pWW0) was found to be subject to catabolite repression when the strain was grown at the maximal rate on glucose or succinate in the presence of an inducer. This report ...

The synthesis of teichoic acids was examined in Bacillus subtilis Marburg grown under conditions of phosphate limitation. The results indicate that the inhibition of polyglycerolphosphate synthesis observed under these conditions is the result of two processes. The first process ...

Pseudomonas fluorescens 378 was studied in continuous culture at a dilution rate of 0.05 or 0.15 h−1 and under a limitation of carbon/energy, nitrogen, phosphorus, iron(III), or oxygen. Cultures were examined for nutritional consumption, production of biosurfactant AP-6 and lipas...

The effects of pyrimidine limitation on chromosome replication and the control of ribosomal and transfer ribonucleic acid syntheses were investigated. Chromosome replication was studied by autoradiography of 3H-thymine pulse-labeled cells. Pyrimidine limitation did not affect the...

The yeast IMD2 to IMD4 and GUA1 genes, involved in GMP synthesis, are highly expressed in exponentially growing cells but are shut off when cells cease to grow upon nutrient limitation. We show for the IMD2 gene that this effect is not specific to certain carbon sources or to gro...

The starvation-survival response of Staphylococcus aureus as a result of glucose, amino acid, phosphate, or multiple-nutrient limitation was investigated. Glucose and multiple-nutrient limitation resulted in the loss of viability of about 99 to 99.9% of the population within 2 da...