background and aim . gingivitis is a reversible inflammatory reaction seen with various degrees in most individuals aged 17 to 22 years. the aim of this study was to compare the effects of two herbal extracts on streptococcus salivarius and streptococcus sanguis. materials and methods . aqueous alcoholic root extracts of malva sylvestris and salvadora persica were prepared and tested on pseudom...

Cyclin-dependent kinases (CDKs) control yeast morphogenesis, although how they regulate the polarity machinery remains unclear. The dimorphic fungus Candida albicans uses Cdc28/Hgc1, a CDK/cyclin complex, to promote persistent actin polarization for hyphal growth. Here, we report that Rga2, a GTPase-activating protein (GAP) of the central polarity regulator Cdc42, undergoes Hgc1-dependent hyper...

The G1 cyclin Cln3 is a key activator of cell-cycle entry in budding yeast. Here we show that Whi3, a negative G1 regulator of Cln3, interacts in vivo with the cyclin-dependent kinase Cdc28 and regulates its localization in the cell. Efficient interaction with Cdc28 depends on an N-terminal domain of Whi3 that is also required for cytoplasmic localization of Cdc28, and for proper regulation of ...

The physiological effects of DL-ethionine and related methionine analogs upon cellular protein synthesis and methyl group transfer to aflatoxin B1 in Aspergillus parasiticus were examined in growing and resting cell systems. The addition of DL-ethionine (0.02 M) to growing mycelia inhibits cellular growth some 37% after 120 h of development. Addition of ethionine before 50 h prevents any aflato...

Human serum more strongly depressed the feeding response of Hydra (ball formation) elicited by S-methylglutathione than plasma. On the basis of the effect of several proteins released by platelets, at least five apparent components of the response (R1-R5) were suggested. Each of the platelet proteins examined specifically depressed a subset of these components. Among the platelet proteins exami...

In recent years, supporting intellectual property right has gained more significance. Intellectual property rights could be considered as legal rights resulting from intellectual activities in industrial, scientific, literary and artistic fields. Today, many countries are seeking practical information about using intellectual property to improve economic growth. Intellectual property rights hav...

Cytoplasmic thioltransferase purified from rat liver [Axelsson, Eriksson & Mannervik (1978) Biochemistry 17, 2978--2984] catalyses the formation and decomposition of mixed disulphides of proteins and glutathione. The enzyme was found to catalyse the reversible thiol-disulphide interchange between glutathione disulphide and a crude thiol-containing protein fraction from rat liver. This finding i...

It is well established that the class-I phosphoinositide (PI) 3-kinases play a crucial role in growth factor signalling pathways. However, evidence has recently emerged that the alpha isoform of the class-II PI 3-kinase (PI 3K-C2alpha) is activated by growth factors, although the consequences of this are poorly understood. Here we demonstrate that the activation of PI 3K-C2alpha is not associat...

using probiotics can control pathogens by a variety of mechanisms. probiotics can promote growth performance and have, therefore, become increasingly important in the aquaculture industry. convict cichlid belongs to the family of cichlidae and is known for its rapid development in laboratory conditions and is suitable for behavioral examinations. the aim of this study was to evaluate the effect...

Soil salinity affects a large part of the region in Iran. Salinity covers 12.5% oftotal area of the country. Priming of seeds in sodium chloride and water (hydro-priming)has been reported to be a simple technique for enhancing the seedling establishment andgermination performance in the seeds of many crops and small seeded grasses under thestress conditions. Therefore, the aim of this research ...