Crayfish spent significantly more time foraging when mussels were

Crayfish spent significantly more time foraging when mussels were unattached, and a greater proportion of attacks were on medium and large than on small mussels (83% of attacks were on medium and large mussels when unattached as opposed to 47% when on druses). Individual crayfish feeding rate decreased significantly at densities of > similar to 5 crayfish learn more m(-2). Signal crayfish are, therefore, unlikely to be able to significantly impact established populations of zebra mussels in the wild, although zebra mussels have the potential to provide crayfish with a substantial food source.”
“Magnetic resonance spectroscopy (MRS) is a powerful clinical tool for investigating the metabolic characteristics of neurologic diseases.

Proton (H-1)-MRS is the most commonly used and

widely available method. In this article, a brief introduction regarding technical issues of H-1-MRS applied to the study of metabolic diseases is followed by a description of findings in some of the most common entities in this large, heterogeneous group of neurologic disorders. The aim was to provide a focused representation of the most common applications of H-1-MRS to metabolic disorders in a routine clinical setting.”
“Introduction. – In hereditary hemorrhagic telangiectasia the pulmonary arteriovenous malformations frequently lead to complications. In a case of pleural effusion in a patient with known pulmonary arterio-venous malformations, the first diagnosis to consider is a hemothorax even though alternatives such as empyema are possible.\n\nCase report. – We report the case of a 35-year-old woman Selleck Elafibranor with see more a known

diagnosis of hereditary hemorrhagic telangiectasia with bilateral arteriovenous malformations, who was admitted to the emergency department with subacute dyspnoea and left thoracic pain. The clinical examination suggested a hemothorax. Pulmonary angiography was performed and showed an arteriovenous malformation in the left lower lobe. Embolisation was undertaken and at the same time a chest tube was inserted. Pus was evacuated leading to the final diagnosis of pleural empyema. Progress was good despite an episode acute respiratory distress due to a pulmonary embolism.\n\nConclusion. – Pleural empyema is rarely described in the context of hereditary hemorrhagic telangiectasia with pulmonary arteriovenous malformations. In the case of pleural effusion this diagnosis should be considered even though hemothorax is more common. (C) 2011 SPLF. Published by Elsevier Masson SAS. All rights reserved.”
“The domain for relational learning was manipulated by varying the training set size for pigeons that had learned the same/different (S/D) concept. Six pigeons that had learned a S/D task with pairs of pictures with a set size of 1024 picture items had their training set size reduced to 8 items. Training on the reduced 8-item set was followed by transfer testing that was repeated four times.

The peak and trough levels in the

The peak and trough levels in the GSK1120212 research buy plasma after the initial administration and repeated administrations for more than 4 days were

comparable with or slightly lower than the reported values for healthy volunteers. Micafungin concentrations in the plasma and burn eschar were between 3.6 and >1,000 times higher than the reported MIC(90)s of micafungin against clinically important Candida and Aspergillus species.”
“The coding of stimuli and responses is crucial for human behaviour. Here, we focused primarily on the response codes (or response categories). As a method, we applied a combined dual-task and task-switch paradigm with a fixed task-to-hand mapping. Usually, negative effects (i.e., costs) are observed for response category repetitions under task switching. However, in several previous studies it has been proposed that

such repetition effects do not occur, Selleckchem Avapritinib if the stimulus categories (e.g., “odd” if digits have to be classified according to their parity feature) are unequivocally mapped to specific responses. Our aim was to test this hypothesis. In the present experiments, we were able to distinguish between three different types of possible response codes. The results show that the participants generally code their responses according to abstract response features (left/right, or index/middle finger). Moreover, the spatial codes were preferred over the finger-type codes even if Evofosfamide mw the instructions stressed the latter. This preference, though, seemed to result from a stimulus-response feature overlap, so that the spatial response categories were primed by the respective stimulus features. If there was no such overlap, the instructions determined which type of response code was involved in response selection and inhibition.”
“BcMF11 as a non-coding RNA gene has an essential role in pollen development, and might be useful for regulating the pollen fertility of crops by antisense RNA technology.\n\nWe previously identified a 828-bp full-length cDNA of BcMF11,

a novel pollen-specific non-coding mRNA-like gene from Chinese cabbage (Brassica campestris L. ssp. chinensis Makino). However, little information is known about the function of BcMF11 in pollen development. To investigate its exact biological roles in pollen development, the BcMF11 cDNA was antisense inhibited in transgenic Chinese cabbage under the control of a tapetum-specific promoter BcA9 and a constitutive promoter CaMV 35S. Antisense RNA transgenic plants displayed decreasing expression of BcMF11 and showed distinct morphological defects. Pollen germination test in vitro and in vivo of the transgenic plants suggested that inhibition of BcMF11 decreased pollen germination efficiency and delayed the pollen tubes’ extension in the style. Under scanning electron microscopy, many shrunken and collapsed pollen grains were detected in the antisense BcMF11 transgenic Chinese cabbage.

Collectively, these results suggest that FXa may be regarded as a

Collectively, these results suggest that FXa may be regarded as a candidate therapeutic agent for treating vascular inflammatory diseases by inhibiting the HMGB1 signalling pathway.”
“It is demonstrated that water-soluble, glucosylated poly(pentafluorostyrene) derivatives BI 2536 chemical structure revealed favorable coating material properties for magnetic iron oxide nanoparticles. To prepare the coating material in high reproducibility and purity as well as in sufficient amounts, a new route of synthesis is established. The preparation and characterization of the glucosylated, tetrafluorostryl monomer, by thiol-para-fluorine “click” reaction, and its polymerization, via nitroxide-mediated radical

process, is presented in detail. In addition, the coating VX-689 datasheet material and the resulting particle properties are investigated by means of XPS, DLS, TGA, TEM, and cryo-TEM as well as flow cytometry. The glycopolymer acts as an appropriate stabilizing

agent for the superparamagnetic nanoparticles by the formation of an approximately 10 nm thick shell, as shown by the XPS analysis. Furthermore, the application of FITC-labeled glycopolymer yielded fluorescent, superparamagnetic nanoparticles, which can be used for monitoring cell-carbohydrate interactions, because these particles show no cytotoxicity toward 3T3 fibroblasts.”
“Asymmetric dimethylarginine (ADMA) – a naturally occurring amino acid that is a product of protein breakdown – is released into the cytoplasm following the post-translational methylation of arginine residues within proteins and the subsequent proteolysis of these arginine-methylated proteins. ADMA inhibits all three isoforms of nitric oxide synthase and therefore has the potential to produce diverse biological effects, particularly in the cardiovascular system. In addition to its renal clearance, endogenously produced ADMA is metabolized to L-citrulline and dimethylamine by the dimethylarginine dimethylaminohydrolase (DDAH)

enzymes. Pharmacological modification Compound C of DDAH has therefore been proposed as a mechanism for manipulating endogenous ADMA concentrations and regulating the production of nitric oxide in situations where alterations in nitric oxide signalling have been shown to contribute to pathophysiology. This Review describes the biology of ADMA and the potential therapeutic utility of manipulating DDAH activity.”
“J. Neurochem. (2012) 122, 321332. Abstract Intravenous immunoglobulin (IVIg) preparations obtained by fractionating blood plasma, are increasingly being used increasingly as an effective therapeutic agent in treatment of several inflammatory diseases. Its use as a potential therapeutic agent for treatment of stroke and Alzheimers disease has been proposed, but little is known about the neuroprotective mechanisms of IVIg.

Late preterm and early term newborns had higher rates of readmiss

Late preterm and early term newborns had higher rates of readmission than term infants. There were significant variations in

readmission rates of newborns born at the 21 hospitals in the IH system.\n\nCONCLUSIONS: Potentially preventable conditions, including feeding problems and jaundice, account for most GSK2399872A cell line early readmissions of newborns. Late preterm and early term newborns have higher rates of readmission and should be assessed for other factors associated with early readmission.”
“Bisphosphonate-related osteonecrosis of the jaw (BRONJ) is a well-characterized oral complication of systemic therapy with bisphosphonates. Pseudoepitheliomatous hyperplasia was observed in some of the lesions. Because Ricolinostat purchase podoplanin expression has been linked to malignant lesions of the oral mucosa, we aimed to investigate

podoplanin expression in the pseudoepitheliomatous hyperplasia. We analyzed archival paraffin- and plastic-embedded specimens from BRONJ using both conventional and immunohistochemical (AE1/AE3, D2-40) staining methods. Eleven out of seventeen BRONJ cases showed pseudoepitheliomatous hyperplasia. All these cases were positive for AE1/AE3 and pseudoepitheliomatous hyperplasia displayed a strong basal and parabasal reaction against podoplanin. The podoplanin expression in pseudoepitheliomatous hyperplasia in BRONJ specimens should not be considered a sign of malignancy. We discuss the current and possible future

roles of surgical pathologists in diagnosing morphological changes associated with the development and therapy of BRONJ lesions.”
“Background: A previous study found that the prevalence of contamination with bacteria of faecal-origin on the hands of men differed across UK cities, with a general trend BI 6727 mouse of increased contamination in northern cities. The aim of this study was to (1) confirm the north-south trend (2) identify causes for the trend.\n\nMethods: Hand swabs from commuters (n = 308) at train stations in 4 cities were tested for the presence of faecal bacteria.\n\nResults: The prevalence of hand contamination with faecal bacteria was again higher in cities in the north compared to the south (5% in London, 4% in Birmingham, 10% in Liverpool and 19% in Newcastle). Contamination risk decreased with age and better personal hygiene (self-reported). Soil contact and shaking hands increased contamination with faecal bacteria. However, in multivariable analysis, none of these factors fully explained the variation in contamination across cities.\n\nConclusion: The study confirmed the north-south differences in faecal contamination of hands without finding a clear cause for the trend. Faecal contamination of hands was associated with personal hygiene indicators suggesting that microbiological testing may contribute to evaluating hygiene promotion campaigns.

A standardized list of behaviors was recorded as observed or abse

A standardized list of behaviors was recorded as observed or absent for both conditions with each dog serving as its own control. To calculate the agreement of individual behaviors between the two conditions, Cohen’s Kappa was used. However, since many of the behaviors occurred at very low or high-frequency-rates, Prevalence-Adjusted, Bias-Adjusted Kappa (PABAK) was used along with Cohen’s

Kappa selleck due to Cohen’s Kappa’s sensitivity to high or low prevalence, for which PABAK adjusts. For the purposes of this study, PABAK or Kappa scores greater than 0.61 were considered an indicator of a good degree of agreement between reactions toward the fake and the real dogs. The degree of agreement varied widely across individual behaviors with, Kappa ranging from -0.04 to 0.75 and PABAK from 0.29 to I. Collapsing individual behaviors into behavior traits (e.g., friendly, aggressive, fearful) revealed a high degree of agreement for the friendly trait (Kappa = 0.60, PABAK = 0.69). However, the aggressive trait did not demonstrate adequate agreement (Kappa = 0.11 and PABAK = 0.38) and the fearful trait demonstrated only moderate agreement between the two stimulus conditions (Kappa = 0.50 and

PABAK = 0.51). These results suggest that, while it may be Galardin possible to use a fake dog for the dog-to-dog subtest to assess friendly behavior toward other dogs, fearful and aggressive behaviors may not be consistent between the fake and real dogs, thus limiting the usefulness of the fake dog during behavior evaluations. In addition, the results of this study suggest more research is needed into the predictive validity of both fake and real

dogs, since it appears the stimulus dog, whether fake or real, can influence the subtest’s results. (C) 2014 Elsevier B.V. All rights reserved.”
“Adjacent alternative 3′ splice sites, those separated by smaller than = 18 nucleotides, provide a unique problem in the study of alternative splicing regulation; there is overlap of the cis-elements that define the adjacent sites. Identification of the intron’s 3′ end depends upon sequence elements that define the branchpoint, polypyrimidine tract, and terminal AG dinucleotide. Starting with RNA-seq data Vorinostat mouse from germline-enriched and somatic cell-enriched Caenorhabditis elegans samples, we identify hundreds of introns with adjacent alternative 3′ splice sites. We identify 203 events that undergo tissue-specific alternative splicing. For these, the regulation is monodirectional, with somatic cells preferring to splice at the distal 3′ splice site (furthest from the 5′ end of the intron) and germline cells showing a distinct shift toward usage of the adjacent proximal 3′ splice site (closer to the 5′ end of the intron). Splicing patterns in somatic cells follow C. elegans consensus rules of 3′ splice site definition; a short stretch of pyrimidines preceding an AG dinucleotide.

Mean of central macular thickness in the pre-injection time for i

Mean of central macular thickness in the pre-injection time for intravitreal triamcinolone acetonide (IVTA) group was 295.62 mu, and 309.87 mu in intravitreal bevacizumab (IVB) group, which were decreased after six months to 199.27 mu and 221.06 mu, respectively (p<0.001). Conclusion: This study shows that IVT

and IVB are both effective in improving vision in uveitic CME. Although effects of triamcinolone on Central Macular Thickness (CMT) are more apparent, this superiority is not seen on Best Corrected Visual Acuity (BCVA).”
“Over selleck kinase inhibitor the last 5 years foliar diseases had caused devastating damages in young plantations of Eucalyptus globulus in Uruguay. The sustainability of this species, the most important in the country with more than 270,000 ha of commercial plantations, depends on the rapid development of resistant genetic stock. The genetic variation in resistance of juvenile foliage to diseases and in the onset to adult foliage were examined in a field trial of E. globulus naturally infected by Mycosphaerella

leaf disease (Mycosphaerella spp. and Teratosphaeria spp.) and Eucalyptus rust (Puccinia psidii). The genetic material included 226 open pollinated seed lots from Nutlin3 16 provenances of Australia, Chile and Uruguay. Disease severity (% of leaf spots and % defoliation) was assessed 8 months after planting and precocity of phase change (% of adult foliage) at 20 months. Tree growth and survival were evaluated every 2 years up to the ninth year. Differences in disease severity and in precocity of phase change were significant among countries of origin and provenances. Within provenances, the narrow-sense individual tree heritabilities for leaf spot severity (0.37), defoliation (0.41) and proportion of adult foliage (0.40) were higher than those obtained for tree growth (0.19 to 0.33) and similar to those obtained

for survival (0.33 to 0.45). Genetic correlations between disease severity and growth traits were negative https://www.selleckchem.com/products/GSK1904529A.html (-0.20 to -0.44) and were also negative between disease severity and survival (-0.28 to -0.51). There were positive genetic correlations between precocity of phase change and growth traits (0.34 to 0.41) and between precocity of phase change and survival (0.29 to 0.37). Our results demonstrate that selection for low disease severity in the first year and for high proportion of adult foliage in the second year are feasible in order to obtain genetic material for sites at risk of infection of both Mycosphaerella leaf disease and Eucalyptus rust.”
“Muscle degenerative diseases such as Duchenne Muscular Dystrophy are incurable and treatment options are still restrained. Understanding the mechanisms and factors responsible for muscle degeneration and regeneration will facilitate the development of novel therapeutics.

Cox regression models, adjusted for age, education, geographic re

Cox regression models, adjusted for age, education, geographic region, smoking, and body mass index, were used to estimate incidence rate ratios and 95 confidence intervals. During 694,818 person-years of follow-up from 1995 through 2009, 452 incident cases of sarcoidosis were identified. The incidence of sarcoidosis decreased as age buy Duvelisib at menopause increased (P-trend 0.03). Both later age at first full-term birth and having a more recent birth were associated with a reduced incidence of sarcoidosis. In models that included both factors, the incidence rate

ratios were 0.60 (95 confidence interval: 0.37, 0.97) for age at first birth epsilon 30 years versus 20 years (P-trend 0.05) and 0.73 (95 confidence interval: 0.43, 1.24) for 5 years since last birth versus epsilon 15 years (P-trend 0.15). No significant associations were observed with age at menarche, parity, lactation,

oral contraceptive use, or female hormone use. These results suggest that later full-term pregnancy and longer exposure to endogenous female hormones may be related GDC-0068 cell line to a reduced risk of sarcoidosis.”
“The paper describes the design and training of a fuzzy neural network used for early diagnosis of a patient through an FPGA based implementation of a smart Erastin concentration instrument. The system employs a fuzzy interface cascaded with a feed-forward neural network. In order to obtain an optimum decision regarding the future pathophysiological state of a patient, the optimal weights of the synapses between the neurons have been determined by using inverse delayed function model of neurons. The neurons that are considered in the proposed network are devoid

of self connections instead of commonly used self connected neurons. The current work also find out the optimal number of neurons in the hidden layer for accurate diagnosis as against the available number of CLB in the FPGA. The system has been trained and tested with renal data of patients taken at 10 days interval of time. Applying the methodology, the chance of attainment of critical renal condition of a patient has been predicted with an accuracy of 95.2%, 30 days ahead of actually attaining the critical condition. The system has also been tested for pathophysiological state prediction of patients at multiple time steps ahead and the prediction at the next instant of time stands out to be the most accurate. (C) 2009 Elsevier Ltd. All rights reserved.”
“We discovered a stem cell factor (SCF)-triggered, MEK1-independent, and P13K-dependent MAPK activation pathway in the Kit-expressing ovarian cancer cell line HEY.

Previous studies

suggested that superoxide anion and H2O2

Previous studies

suggested that superoxide anion and H2O2 generation are involved in T cell receptor (TCR)-dependent signaling. Here, we describe that antigen-dependent activation of human T lymphocytes significantly increased extracellular SOD-1 levels in lymphocyte cultures. This effect was accompanied by the synthesis of SOD-1-specific mRNA and by the induction of microvesicle SOD-1 secretion. It is of note that SOD-1 increased its concentration specifically in T cell population, while no significant changes were observed in the “non-T” cell counterpart. Moreover, confocal microscopy showed that antigen-dependent activation was able to modify SOD-1 intracellular localization in T cells. Indeed, was observed a clear SOD-1 recruitment by TCR clusters. The ROS scavenger https://www.selleckchem.com/products/Gefitinib.html N-acetylcysteine (NAC) inhibited this phenomenon. Further studies are needed to define whether SOD-1-dependent superoxide/peroxide balance is relevant for regulation of T cell activation, as well

as in the functional cross talk between immune effectors. (C) 2013 Elsevier B.V. All rights reserved.”
“Background: With thousands of fungal genomes being sequenced, each genome containing up to 70 secondary metabolite (SM) clusters 30-80 kb in size, breakthrough techniques selleck compound are needed to characterize this SM wealth. Results: Here we describe a novel system-level methodology for unbiased cloning of intact large SM clusters from a single fungal genome for one-step transformation Alvespimycin and expression in a model host. All 56 intact SM clusters from Aspergillus terreus were individually captured in self-replicating fungal artificial chromosomes (FACs) containing both the E. coli F replicon and an Aspergillus autonomously replicating sequence (AMA1). Candidate FACs were successfully shuttled between E. coli and the heterologous expression host A. nidulans. As proof-of-concept, an A. nidulans FAC strain was characterized in a novel liquid chromatography-high resolution mass spectrometry (LC-HRMS) and data analysis pipeline, leading to the discovery of the A. terreus astechrome biosynthetic machinery. Conclusion: The

method we present can be used to capture the entire set of intact SM gene clusters and/or pathways from fungal species for heterologous expression in A. nidulans and natural product discovery.”
“Apicomplexan parasites generally invade their host cells by anchoring the parasite to the host membrane through a structure called the moving junction (MJ). This MJ is also believed to sieve host proteins from the nascent parasitophorous vacuole membrane, which likely protects the pathogen from lysosomal destruction. Previously identified constituents of the Toxoplasma MJ have orthologues in Plasmodium, indicating a conserved structure throughout the Apicomplexa. We report here two novel MJ proteins, RON5 and RON8. While RON5 is conserved in Plasmodium, RON8 appears restricted to the coccidia.

(C) 2014 ISEH – International Society for Experimental Hematology

(C) 2014 ISEH – International Society for Experimental Hematology. Published by Elsevier Inc.”
“A 48-year-old Caucasian male patient presented with severe adverse drug events (ADEs) while being treated with a standard dose (600 mg/day) of efavirenz. The patient’s clinical course was favourable; however, he also described intense nightmares, cramps in his legs and anxiety disturbances that made

him highly irritable. Measurement of the patient’s efavirenz plasma concentrations revealed a mean minimum steady-state concentration during a dosage interval (C(min,ss)) of 12.7 mg/L, which was much higher than that recommended for this drug (therapeutic range 1-4 mg/L). Consequently, the dose of efavirenz was reduced to 400 mg/day, which resulted in a decrease PRIMA-1MET this website in the frequency of ADEs. Subsequent genotype testing showed that the patient was homozygous for both the CYP2B6-G516T (T/T) and CYP2B6-A785G (G/G) alleles; these polymorphisms are associated with reduced enzymatic activity and elevated efavirenz plasma concentrations. Because of this and the fact that the patient’s mean efavirenz C(min,ss) was still high (4.6 mg/L), a second dosage reduction was undertaken, to 200 mg/day. This also resulted in a reduction in ADEs. At present, the patient’s CD4(+) levels remain stable, his

viral load continues to be undetectable and the mean efavirenz C(min,ss) is within the therapeutic range (2.7 mg/L).”
“Cap-binding proteins have been routinely isolated using m(7)GTP-Sepharose; however, this resin is inefficient for proteins such as DcpS (scavenger decapping enzyme), which interacts not only with the 7-methylguanosine, but also with the second cap base. In addition, DcpS purification may be hindered by the reduced resin Prexasertib capacity due to the

ability of DcpS to hydrolyze m(7)GTP. Here, we report the synthesis of new affinity resins, m(7)GpCH(2)pp- and m(7)GpCH(2)ppA-Sepharoses, with attached cap analogs resistant to hydrolysis by DcpS. Biochemical tests showed that these matrices, as well as a hydrolyzable m(7)GpppA-Sepharose, bind recombinant mouse eIF4E((28-217)) specifically and at high capacity. In addition, purification of cap-binding proteins from yeast extracts confirmed the presence of all expected cap-binding proteins, including DcpS in the case of m(7)GpCH(2)pp- and m(7)GpCH(2)ppA-Sepharoses. In contrast, binding studies in vitro demonstrated that recombinant human DcpS efficiently bound only m(7)GpCH(2)ppA-Sepharose. Our data prove the applicability of these novel resins, especially m(7)GpCH(2)ppA-Sepharose, in biochemical studies such as the isolation and identification of cap-binding proteins from different organisms.”
“The recently identified bacterial type VI secretion system (T6SS) has rapidly become one of the most interesting areas of research in microbiology. In a relatively short period of time the relationship between the T6SS and the bacteriophage T4 tail and baseplate has been established.

Thus, Th17 cells can promote humoral autoirnmunity via a novel me

Thus, Th17 cells can promote humoral autoirnmunity via a novel mechanism that involves CCL2.”
“Aims: A bridging ligand 2,4,6-pyridine tricarboxylic acid (H(3)ptc) and its manganese(II) complex [Mn(Hptc)(phen)(OH)]n(Hptc = 2,4,6-pyridine tricarboxylic acid, phen = 1,10-phenanthroline) have been synthesized and characterized.\n\nMain methods: The interaction with DNA (HeLa and KB) was carried out by fluorescence

spectrum and gel electrophoresis assay. Screening Library In vitro apoptosis assay and cytotoxicity assay detect the manganese (II) complex interaction with cancer cells.\n\nKey findings: Fluorescence spectrum demonstrated the ability of the complexes to interact with DNA in an intercalative mode. Gel electrophoresis assay exhibited more effective DNA-cleavage activity. In vitro apoptosis assay of the complexes were examined on HeLa and KB cells, exhibited cytotoxic specificity and a significant cancer cell inhibitory rate.\n\nSignificance: The complex may be a latent antitumor agent as a result of its unique interaction mode with DNA and cancer cells inhibition effect. Crown Copyright (C) 2012 Published by Elsevier Inc. All rights reserved.”
“Environmental signals induce diverse cellular differentiation programs. In certain systems, cells defer differentiation

for extended time periods after the signal appears, proliferating Prexasertib Ricolinostat cost through multiple rounds of cell division before committing to a new fate. How can cells set a deferral time much longer than the cell cycle? Here we study Bacillus subtilis cells that respond to sudden nutrient limitation with multiple rounds of growth and division before differentiating into spores. A well-characterized genetic circuit controls the concentration and phosphorylation of the master regulator Spo0A,

which rises to a critical concentration to initiate sporulation. However, it remains unclear how this circuit enables cells to defer sporulation for multiple cell cycles. Using quantitative time-lapse fluorescence microscopy of Spo0A dynamics in individual cells, we observed pulses of Spo0A phosphorylation at a characteristic cell cycle phase. Pulse amplitudes grew systematically and cell-autonomously over multiple cell cycles leading up to sporulation. This pulse growth required a key positive feedback loop involving the sporulation kinases, without which the deferral of sporulation became ultrasensitive to kinase expression. Thus, deferral is controlled by a pulsed positive feedback loop in which kinase expression is activated by pulses of Spo0A phosphorylation. This pulsed positive feedback architecture provides a more robust mechanism for setting deferral times than constitutive kinase expression.