Crosses between different genera of plants are rare and a satisfactory cytological study of such hybrids has never been made. A comparison of chromosome behavior in genus and species crosses is of interest in connection with a comparison of genetic and taxonomic relationships. A cytological analysis should also show the reason why crosses of genera are almost completely or quite sterile and whe...

a total of 65 pollen types were identified from two years atmospheric pollen survey in the environmental conditions of south assam. out of them, eight pollen types viz., acacia auriculiformis, amaranthus spinosus, cassia alata, cleome gynandra, cocos nucifera, imperata cylindrica, ricinus communis and trewia nudiflora, were selected for biochemical studies on the basis of their dominance in the...

A new species of Pseudotetracha from Northern Territory, Australia, is described and compared with Pseudotetracha marginicollis (Sloane, 1906). The position of the species in the genus and the subgeneric classification of Pseudotetracha Fleutiaux, 1894 are discussed. It is proposed that the genus would be divided into the following species groups: "australasiae", "australis", "blackburni", "cru...

Suspended particulate matter (SPM) strongly alters the trophic environment of photosymbiotic aquatic organisms. At high particles loads, phototrophic energy gains can be diminished due to light absorption by suspended particles, and stress from particle abrasion or deposition on tissues. However, energy gains are enhanced if organisms are able to use SPM as a food source. For photosymbiotic ben...

Carum carvi (CC) is a grassy plant which is believed to have several therapeutic effects, including anti-asthmatic properties. We have therefore studied the bronchodilatory and anticholinergic effects of this plant. The bronchodilatory effects of the aqueous extract (AE), macerated extract (ME), essential oil (EO), and 4µM theophylline (T) in comparison with saline (S) were examined by the...

Nudibranchs that exclusively eat scleractinian corals provide a rare opportunity to study specialist predation in the marine environment. To measure the diet breadth of 4 Phestilla species on Guam, we offered the nudibranchs different corals in choice and no-choice feeding assays. Larval preferences were determined by measuring the percent metamorphosis in response to different coral species. W...

The cyanophycin granules from two-week-old cultures of the blue-green alga Anabaena cylindrica were isolated by sonication of the cells followed by differential centrifugation. These particles are composed of polypeptides containing only two amino acids, aspartic acid and arginine, and have a molecular weight between about 25,000 and 100,000.

Cercospora cf. sigesbeckiae is an ascomycete fungal pathogen that infects various plants, including important agricultural commodities, such as soybean. Here, we report the first draft genome sequence and assembly of this pathogen.

Abstract Nitrite (NO2?) accumulation and retaining of anammox bacteria are two decisive factors for stable operation partial denitrification coupled with the process. Denitrifying ammonium oxidation (DEAMOX) process has been regarded as a promising method nitrogen removal from wastewater containing both (NH4+) nitrate (NO3?) pollutants simultaneously. However, performance efficiency DEAMOX in b...