Reference Type: Journal Article Record Number: 113 Author
Download 1.4 Mb.
|
Reference Type: Journal Article Record Number: 4 Author: Tiwari, D. N.; Singh, L. J.; Mishra, A. K. Year: 1985 Title: Evidence for a Reversible Action of Methionine Sulphoximine During Growth of the Cyanobacterium, Gloeotrichia ghosei Singh Journal: New Phytologist Volume: 99 Issue: 3 Pages: 361-365 Date: Mar. Keywords: Cyanobacteria, Gloeotrichia ghosei, Growth, L-Methionine-DL-Sulphoximine, Nitrate, Ammonia Uptake, Amino Acids Abstract: Inhibition by L-methionine-DL-sulphoximine (MSX) of growth, nitrate and ammonia uptake in Gloeotrichia ghosei Singh disappeared after a lag period of 6 to 8 d. The ability of the organism to resume growth or nitrogen uptake following a lag period was not due to decay of the inhibitor. Amino acids such as glutamine or methionine, which function as nitrogen sources, abolished the inhibitory action of MSX. Notes: FLA 0028646x
Blackwell Science Publications Copyright 1985 New Phytologist Trust URL: http://links.jstor.org/sici?sici=0028-646X%28198503%2999%3A3%3C361%3AEFARAO%3E2.0.CO%3B2-L Reference Type: Journal Article Record Number: 212 Author: Sarkar, S.; Jana, B. B. Year: 1985 Title: Biomass determination in some species using a geometric equivalent technique of plankton organisms Journal: Acta Hydrochim. Hydrobiol. Volume: 13 Issue: 2 Pages: 217-221 Accession Number: 1200248 Keywords: plankton; ponds; biomass; fish ponds; measurement; methodology measuring techniques Freshwater D 04001 Methodology - general; K 03009 Algae; Q1 01461 Plankton Abstract: The plankton collected from three fish ponds shows a considerable variability within a pond, between the ponds and in the course of the year. The individual volumes or weights are (minimum-mean-maximum): Gleotrichia echinulata 41-252-879 mu g super(3), Chlorella vulgaris) 18-42-94 mu m super(3), Oscillatoria amphigranulata) 99-306-827 mu m super(3), Brachionus plicatilis) 1-4.9-18 mu g, nauplia 0.5-1.25-2.35 mu g, Mesocyclops hyalinus 4-45-369- mu g, Heliodiaptomus viduus 41-202-288 mu g, Daphnia carinata 186-1468-4578 mu g. Notes: 1985 0323-4320 English Journal Article Author Address: Univ. Kalyany, Dep. Zool., 741 235 Kalyany, W.B., India Reference Type: Journal Article Record Number: 214 Author: Mishra, A. K.; Tiwari, D. N. Year: 1985 Title: Enhancement of NTG mutagenesis by chloramphenicol in Gloeotrichia ghosei Journal: Molecular and General Genetics Volume: 201 Issue: 2 Pages: 351-2 Accession Number: AN 1986:181467 Keywords: Mutation (from methylnitronitrosoguanidine, in Gloeotrichia ghosei, chloramphenicol effect on); Gloeotrichia ghosei (methylnitrosoguanidine mutagenicity in, chloramphenicol effect on) methylnitronitrosoguanidine mutagenicity Gloeotrichia chloramphenicol Abstract: The mutagenicity of N-methyl-N-nitro-N-nitrosoguanidine (NTG) [70-25-7] for G. ghosei, a cyanobacterium, was enhanced by simultaneous treatment with NTG and chloramphenicol [70-25-7] with minimal effect on survival. Addn. of chloramphenicol at the time of NTG treatment enhanced the mutation frequency of the filsmarker .apprx.10-fold. [on SciFinder (R)] Notes: CAN 104:181467 4-6
Toxicology Cent. Adv. Study Bot.,Banaras Hindu Univ.,Varanasi,India. Journal 0026-8925 written in English. 56-75-7; 70-25-7 Role: BIOL (Biological study) (mutagenicity in Gloeotrichia ghosei in relation to); 70-25-7 Role: ADV (Adverse effect, including toxicity), BIOL (Biological study) (mutagenicity of, in Gloeotrichia ghosei, chloramphenicol effect on) Reference Type: Journal Article Record Number: 213 Author: Mishra, B. B.; Nanda, D. R.; Misra, B. N. Year: 1985 Title: Reclamation with blue-green algae: changes in nucleic acids, protein and nitrogen content of algae exposed to solid waste of a chlor-alkali factory Journal: Environmental Pollution, Series A: Ecological and Biological Volume: 37 Issue: 2 Pages: 97-104 Accession Number: AN 1985:107771 Keywords: Waste solids (from chlor-alkali plant, algae response to, mercury content in relation to); Aphanothece; Cyanobacteria; Cylindrospermum; Gloeotrichia; Nostoc (mercury uptake by, chlor-alkali solid waste reclamation in relation to); Deoxyribonucleic acids; Proteins; Ribonucleic acids Role: BIOL (Biological study) (of blue-green algae, mercury uptake effect on, chlor-alkali solid waste reclamation in relation to) mercury solid waste algae reclamation Abstract: During an attempt at the possible reclamation of solid waste from a chlor-alkali factory by blue-green algae, the effects of Hg-contaminated solid waste on biochem. variables were studied. DNA, RNA, protein, and algal N content of the algal material showed a significant decrease with increase in time and also solid waste concn. An increase in RNA/DNA ratio and a decrease in protein/RNA ratio were also obsd. Algae accumulated appreciable amts. of Hg from the waste, showing dependence on both concn. and time. Significant correlations were obtained between Hg uptake and concns. of the waste and between different combinations of algae and Hg uptake. [on SciFinder (R)] Notes: CAN 102:107771 4-3
Toxicology Dep. Bot.,Berhampur Univ.,Berhampur,India. Journal 0143-1471 written in English. 7727-37-9 Role: BIOL (Biological study) (of blue-green algae, mercury uptake effect on, chlor-alkali solid waste reclamation in relation to); 7439-97-6 Role: BIOL (Biological study) (uptake of, by algae, chlor-alkali solid waste reclamation in relation to) Reference Type: Journal Article Record Number: 215 Author: Maity, H.; Santra, S. C. Year: 1985 Title: Blue-green algal flora of 24-Paraganas, West Bengal (India) Journal: Phykos (Algiers) Volume: 24 Issue: 1-2 Pages: 46-51 Alternate Journal: Phykos. Accession Number: 1392319 Keywords: geographical distribution; aquatic environment; check lists; rice fields; growth; ecophysiology; environmental factors; ecological distribution; Cyanophyta; India India, West Bengal, 24-Paraganas Freshwater K 03009 Algae; Q1 01422 Environmental effects; K 03095 Soil; Q1 01222 Geographical distribution
0554-1182 English Journal Article Author Address: Sch. Environ. Sci., Univ. Kalyani, Nadia, West Bengal, India Reference Type: Report Record Number: 216 Author: Lambert, G. L.; Carr, N. G. Year: 1985 Title: Isolation, characterization and cloning of plasmids from hydrogen producing cyanobacteria Institution: Dep. Biochem.,Univ. Liverpool,Liverpool,UK. Pages: 33 pp Accession Number: AN 1985:517151 Keywords: Anabaena variabilis; Nostoc; Plectonema (cryptic plasmids of, isolation and restriction mapping of); Methylation (of DNA of filamentous cyanobacteria); Plasmid and Episome (of cyanobacteria, isolation and characterization of); Deoxyribonucleic acids Role: BIOL (Biological study) (of plasmid, of cyanobacteria, restriction mapping of); Molecular cloning (of plasmids, from cyanobacteria); Cyanobacteria (plasmids of, isolation and characterization of) plasmid cyanobacteria; cloning plasmid cyanobacteria Abstract: Several procedures for the isolation of plasmids from cyanobacteria were compared, and a method consisting of phenol extn. of cleared lysates proved the most satisfactory. Plasmids ranging in size from 2.6 to >=30 MDa were isolated. Using restriction endonuclease enzymes, phys. maps of cryptic plasmids from the filamentous cyanobacteria Anabaena variabilis PCC 7118 (pGL1:3.6 MDa), Nostoc PCC 6705 (pGL2: 2.6 MDa), and Plectonema PCC 6306 (pGL3: 0.95 MDa) were generated. Selectable markers were introduced onto pGL2 and pGL3 by fusing them to the vector pBR328, using their single restriction sites for ClaI. The recombinant plasmids generated were characterized with respect to the orientation of the insert and the single sites for restriction endonucleases which they possess. The stability of pGL1 and of the 2 recombinant plasmids in culture was investigated, and a method for isolating larger cyanobacteria plasmis (>20 MDa) was devised. Chromosomal DNA from 9 species of filamentous cyanobacteria as diverse as Nostoc, Gloeotrichia, and Plectonema is suggested to be extensively modified (methylated) by its resistance to cleavage by a no. of restriction endonucleases. A remarkably similar pattern of DNA modification in these species contrasts with the known heterogeneity of their type II restriction endonuclease content. In particular, Nostoc PCC 73102, which lacks detectable sequence-specific endonucleases, is shown to possess extensive DNA modification. The use of isoschizomers demonstrates the presence of a methylase in the filamentous strains analogous to the dam enzyme of Escherichia coli. [on SciFinder (R)] Notes: CAN 103:117151 3-1
Biochemical Genetics Report
written in English. 81457-99-0 Role: PRP (Properties) (of filamentous cyanobacteria) Reference Type: Journal Article Record Number: 100 Author: Horne, A. J.; Galat, D. L. Year: 1985 Title: Nitrogen Fixation in an Oligotrophic, Saline Desert Lake: Pyramid Lake, Nevada Journal: Limnology and Oceanography Volume: 30 Issue: 6 Pages: 1229-1239 Date: Nov. Abstract: High rates of nitrogen fixation by a short-lived but dense unialgal bloom of the planktonic blue-green Nodularia spumigena provide 99.5% of the alga's needs and 81% of Pyramid Lake's annual total combined nitrogen input in 1979. The bloom was spatially very heterogeneous. Bloom size, duration, and presumably $N_2$ fixation vary from year to year, but in 1979 about 900 t of nitrogen were fixed in 2 months in this large deep lake. The annual rate of $N_2$ fixation was about $2 g m^-2$. In this year of low inflow the Truckee River provided 54 t of inorganic nitrogen and 83 t of organic nitrogen. Planktoni $N_2$ fixation has not been measured during high inflow years and may have been small relative to river input. Lakewide average heterocyst to vegetative cell (h: c) ratios followed seasonal trends in $N_2$ fixation, but synoptic samples showed only a weak relation between h: c and $N_2$ fixation. $N_2$ fixation was induced by low epilimnetic levels of inorganic nitrogen and ended before lake overturn in the fall. High rates of $N_2$ fixation were confined to the upper 5% of the epilimnetic volume and thus occurred only in calm weather when Nodularia colonies floated to the lake surface. Access to freshly dissolved atmospheric $CO_2$ may account for the near-surface dependence, since the lake pH is normally about 9.2. We predict that Nodularia will not show the same degree of near-surface dependence in near-neutral lakes or in the ocean. Notes: FLA 00243590
American Society of Limnology and Oceanography latex
Copyright 1985 American Society of Limnology and Oceanography URL: http://links.jstor.org/sici?sici=0024-3590%28198511%2930%3A6%3C1229%3ANFIAOS%3E2.0.CO%3B2-D Reference Type: Journal Article Record Number: 217 Author: Duong, Tran Phuoc; Tiedje, James M. Year: 1985 Title: Nitrogen fixation by naturally occurring duckweed-cyanobacterial associations Journal: Canadian Journal of Microbiology Volume: 31 Issue: 4 Pages: 327-30 Accession Number: AN 1985:218518 Keywords: Nitrogen fixation (in duckweed-cyanobacterial assocns.); Symbiosis (in nitrogen fixation in duckweed cyanobacterial assocns.); Duckweed (nitrogen fixation assocd. with blooms of, in water); Anabaena; Calothrix; Cylindrospermum; Gloeotrichia; Nostoc (nitrogen fixation in duckweed assocd. with, in water); Waters (nitrogen fixation in duckweed-cyanobacterial assocn. in); Duckweed (L. trisulca, nitrogen fixation assocd. with blooms of, in water) nitrogen nutrition duckweed cyanobacteria; nitrogen fixation duckweed water ecol Abstract: N fixation as measured by acetylene conversion to ethylene was found to be common for duckweed blooms on ponds, lakes, and streams in Michigan. Twenty-six of 29 sites with duckweed sampled over a 2-yr period showed acetylene redn. activity (ARA). These activities corresponded to N inputs of 3.7-7.5 kg N/ha/annual cycle for typical blooms but dense Lemna trisulca blooms could be 10 times greater. The ARA was stimulated 5-6-fold by light, was not removed when plants were shaken in water, and was usually assocd. with the leaves and not the roots. Colonies of heterocyst-bearing cyanobacteria of the genera Nostoc, Gloeotrichia, Anabaena, Calothrix, and Cylindrospermum were obsd. attached to the lower epidermis or in the reproductive pockets of leaves of Spirodela and Lemna plants but not on Wolffia plants. The ARA correlated reasonably well with the d. of cyanobacterial colonies obsd. The duckweed appeared to provide a more favorable environment for the cyanobacteria which should result in enhanced nitrogen inputs to aquatic and sediment environments harboring duckweed. The N2 fixation was not sufficient, however, to meet all the N needs of the duckweed bloom. [on SciFinder (R)] Notes: CAN 102:218518 11-3
Plant Biochemistry Dep. Crop Soil Sci.,Michigan State Univ.,East Lansing,MI,USA. Journal 0008-4166 written in English. Reference Type: Journal Article Record Number: 219 Author: Chang, T. P.; Chang-Schneider, H. Year: 1985 Title: Revision of the cyanophycean genus Gloeotrichia Journal: Archiv fuer Hydrobiologie, Supplement Volume: 71 Issue: 1-2 Pages: 249-256 Alternate Journal: Arch. Hydrobiol. (Suppl.). Original Publication: Revision der Blaualgengattung Gloeotrichia Accession Number: 1077536 Keywords: taxonomy; cell morphology; Gloeotrichia Freshwater Q1 01223 Taxonomy and morphology
0342-1120 Referred to also as Algological Studies 38/39. German
Journal Article Author Address: Rosenst. 15, D-8044 Lohhof, FRG Reference Type: Journal Article Record Number: 218 Author: Chang, T. P. Year: 1985 Title: Comparative studies on Gloeotrichia -species Journal: Archiv fuer Hydrobiologie, Supplement Volume: 71 Issue: 1-2 Pages: 235-247 Alternate Journal: Arch. Hydrobiol. (Suppl.). Original Publication: Vergleichsstudien and Gloeotrichia -Arten Accession Number: 1193339 Keywords: cell morphology; cultured organisms; nutritional requirements; Gloeotrichia Freshwater Q1 01223 Taxonomy and morphology Abstract: The morphological variability of some species in the genus Gloeotrichia was studied and compared with the cultures from the algal collections as well as the collected samples from natural environments. Inter-strain variations were not investigated but the inter-species variations were. Filaments with both heterocysts and akinetes belong to Gloeotrichia species, such as Gl. echinulata, Gl. longicauda and Gl. natans . The morphologically changed forms of one species in the nutrient-enriched cultures are very comparable with different described species living in the polluted waters. Some ecological co-relations between morphological changes and nutrient requirements are discussed. Notes: 1985 0342-1120 Referred to also as Algol. Stud. 38/39. German
Journal Article Author Address: Inst. Strahlenhyg. Bundesgesundheitsamtes, Ingolstaedter Landstr. 1, D-8042 Neuherberg, FRG Reference Type: Journal Article Record Number: 220 Author: Batten, D. J.; Van Geel, B. Year: 1985 Title: Celyphus rallus , probable Early Cretaceous rivulariacean blue-green alga Journal: Review of Paleaobotany and Palynology Volume: 44 Issue: 3-4 Pages: 233-241 Alternate Journal: Rev. Palaeobot. Palynol. Accession Number: 1070243 Keywords: vegetal fossils; Cretaceous; British Isles, England Celyphus rallus Freshwater Q1 01187 Palaeontology Abstract: The morphological resemblance between the sheaths of modern Gloeotrichia and Early Cretaceous Celyphus rallus Batten strongly suggests that the latter is a Mesozoic relative of extant blue-green algal species belonging to the family Rivulariaceae. The fossils are typically encountered in argillaceous sediments that were deposited in non-marine environments. Notes: 1985 English
Journal Article Author Address: Dep. Geol. and Mineral., Marischal Coll., Aberdeen Univ., Aberdeen AB9 1AS, UK Reference Type: Journal Article Record Number: 99 Author: Pick, F. R.; Lean, D. R. S.; Nalewajko, C. Year: 1984 Title: Nutrient Status of Metalimnetic Phytoplankton Peaks Journal: Limnology and Oceanography Volume: 29 Issue: 5 Pages: 960-971 Date: Sep. Abstract: The nutrient state of the chrysophyte, Chrysosphaerella longispina, forming a large metalimnetic chlorophyll a peak in Jacks Lake, Ontario, was examined over several summers. Turnover times of phosphate were fast in the epilimnion (minutes) but slow (hours) at the depth of the peak. Long turnover times, high concentrations of polyphosphate, low P debt, low $V_max$, and high $K_t$ values for phosphorus all indicated that initially the peak was not more P-deficient than epilimnetic phytoplankton. However, with time it became P-deficient and this factor coincided with its demise in August. At no time was the peak population N-deficient. The peak population was not supplied by nutrients from the hypolimnion nor from the mineralization of sedimenting epilimnetic material but instead seemed to have brought cellular reserves of phosphorus when it migrated down from the epilimnion. Notes: FLA 00243590
American Society of Limnology and Oceanography latex
Copyright 1984 American Society of Limnology and Oceanography URL: http://links.jstor.org/sici?sici=0024-3590%28198409%2929%3A5%3C960%3ANSOMPP%3E2.0.CO%3B2-%23 Reference Type: Journal Article Record Number: 98 Author: Oliver, R. L.; Walsby, A. E. Year: 1984 Title: Direct Evidence for the Role of Light-Mediated Gas Vesicle Collapse in the Buoyancy Regulation of Anabaena flos-aquae (Cyanobacteria) Journal: Limnology and Oceanography Volume: 29 Issue: 4 Pages: 879-886 Date: Jul. Abstract: Quantitative measurements were made of the changes in gas vacuole volume and the major components of cell mass (protein and carbohydrate) on culture of Anabaena flos-aquae which lost buoyancy as they were shifted from low to high light intensity. assuming densities of $1,300 kg \cdot m^-3$ for protein and 1,600 for carbohydrate, we calculated the change in ballast brought about by changes in these components and compared them with ballast changes resulting from gas vacuole collapse. We also compared the calculated excess density of filaments with direct measurements of filament density in gradients of Percoll. The results clearly demonstrate that increased density resulted from the loss of gas vacuoles. Small variations in density could be attributed to charges in protein and carbohydrate but these would not have caused a loss of buoyancy in the absence of a decrease in gas vacuole content. Analyses of the type described can be used to determine the cause of buoyancy change in other microorganisms and can be performed on phytoplankton collected from lakes. Notes: FLA 00243590
American Society of Limnology and Oceanography latex
Copyright 1984 American Society of Limnology and Oceanography URL: http://links.jstor.org/sici?sici=0024-3590%28198407%2929%3A4%3C879%3ADEFTRO%3E2.0.CO%3B2-%23 Reference Type: Book Record Number: 221 Author: Lazaroff, N.; DiBlasio, E.; Tannenbaum, C. Year: 1984 Title: A comparative study of photoinduced nostocacean development ISBN: 0022-3646 Accession Number: 910466 Keywords: light effects; Nostoc; Gloeotrichia biological development Freshwater Q1 01224 Reproduction and development Abstract: A cycle of development controlled by the quality of incident light had been described previously for Nostoc muscorum A and Nostoc commune 584. The authors now describe the occurrence of photoinduced development in four additional axenic strains of Nostoc and an analogous process in a Gloeotrichia species that exhibits complementary chromatic adaptation. Notes: Annual Meeting of the Phycological Society of America, Fort Collins, CO (USA), 5-9 Aug 1984 (ABSTRACTS. ANNUAL MEETING OF THE PHYCOLOGICAL SOCIETY OF AMERICA, 1984)., 1984, p. 23, Journal of Phycology [J. PHYCOL.], vol. 20, no. suppl. Summary only. English
Book Monograph; Conference; Summary Directory: chemistry chemistry -> Summer 2015 Research Opportunities for Chemistry & Biochemistry Undergraduates chemistry -> Application for Summer Undergraduate Research Program nsf research Experiences for Undergraduates (reu) – 2015 Please Print Clearly or Type chemistry -> Application for Summer Undergraduate Research Program nsf research Experiences for Undergraduates (reu) – 2016 Please Print Clearly or Type chemistry -> Summer 2014 Research Opportunities for Chemistry & Biochemistry Undergraduates chemistry -> Summer 2016 Research Opportunities for Chemistry & Biochemistry Undergraduates chemistry -> Cloud Point Extraction Methodology for Separation and Microamounts Determination of Lead chemistry -> Spring Hill College List of Nearby Restaurant Options Atlanta Bread Company chemistry -> Where the heck is Fernando de Noronha? chemistry -> Topics 6 & 16: Kinetics 1 Collision theory and rates of reaction Download 1.4 Mb. Share with your friends:
|