Issues of modern algology (Вопросы современной альгологии)最新文献_第9页

The biochemical composition of Cylindrotheca closterium (Ehrenb.) Rayman net Levin, as a source of biologically active substances in cumulative cultivation 柱鞘菌的生化成分研究莱曼净莱文，作为生物活性物质的来源，在积累栽培

Issues of modern algology (Вопросы современной альгологии) Pub Date : 1900-01-01 DOI: 10.33624//2311-0147-2021-1(25)-1-9

S. Zheleznova, R. Gevorgiz

{"title":"The biochemical composition of Cylindrotheca closterium (Ehrenb.) Rayman net Levin, as a source of biologically active substances in cumulative cultivation","authors":"S. Zheleznova, R. Gevorgiz","doi":"10.33624//2311-0147-2021-1(25)-1-9","DOIUrl":"https://doi.org/10.33624//2311-0147-2021-1(25)-1-9","url":null,"abstract":"In this work, we studied the biochemical characteristics of the diatom Cylindrotheca closterium in the cumulative mode of cultivation in different phases of growth. According to our data, in the exponential growth phase, C. closterium biomass is characterized by a minimum lipid content of 3% of dry biomass and a maximum carbohydrates content of 23% of dry weight. During the transition of C. closterium culture to the stationary growth phase, as in the case of a representative of diatoms, a rather high accumulation of total lipids is observed – to 28% dry weight, while the carbohydrates content decreases to 7%. At the end of the stationary phase (21st day of cultivation), the content of fatty acids is 50% of total lipids or 12.5% of dry weight. A certain relationship between the concentrations of fucoxanthin, total lipids and polyunsaturated fatty acids (PUFA) in the biomass of C. сlosterium diatom was recorded. During active growth in the exponential phase, the concentration of fucoxanthin was 0.5–1 mg∙g-1 dry weight. During the tranition of the culture to the stationary phase of growth, the concentration of fucoxanthin reached 7±0.2 mg∙g-1 dry biomass. At the end of the stationary phase, the concentration of fucoxanthin reached its maximum value of 20 mg∙g-1 dry weight.","PeriodicalId":305989,"journal":{"name":"Issues of modern algology (Вопросы современной альгологии)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120948909","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Evolution and a current state of high-mountain Lake Kari (Armenia) as inferred from the diatom study 从硅藻研究中推断的高山湖泊Kari(亚美尼亚)的进化和现状

Issues of modern algology (Вопросы современной альгологии) Pub Date : 1900-01-01 DOI: 10.33624/2311-0147-2019-2(20)-229-232

A. Ludikova, T. Sapelko, D. D. Kuznetsov, M. A. Naumenko, V. Boynagryan

引用次数: 0

Starch and triacylglycerol accumulation in the cells of the stain Chlorella sp. IPPAS C-1210 IPPAS C-1210染色小球藻细胞中淀粉和甘油三酯的积累

Issues of modern algology (Вопросы современной альгологии) Pub Date : 1900-01-01 DOI: 10.33624/2311-0147-2021-2(26)-1-7

L. A. Bobrovnikova, M. S. Pakholkova, R. Sidorov, M. Sinetova

{"title":"Starch and triacylglycerol accumulation in the cells of the stain Chlorella sp. IPPAS C-1210","authors":"L. A. Bobrovnikova, M. S. Pakholkova, R. Sidorov, M. Sinetova","doi":"10.33624/2311-0147-2021-2(26)-1-7","DOIUrl":"https://doi.org/10.33624/2311-0147-2021-2(26)-1-7","url":null,"abstract":"Strain Сhlorella sp. IPPAS C-1210 is an effective lipid and triacilglycerols (TAG) producer. The strain could be used eventually in such industries as bioenergetics, food industry and agriculture. The objective of this work was investigation of conditions in which the strain Сhlorella sp. IPPAS C-1210 accumulates the most starch and TAG in cells with a view to optimise its growth and productivity. The following cultivation parameters were investigated in order to figure out their influence on accumulation of starch and TAG: nitrogen- and phosphorous-starvation and cultivation on media with different nitrogen (nitrate, urea) and carbon (carbon dioxide, bicarbonate) sources. Pigments, starch, protein and lipid content in cells were measured. The exclusion of nitrogen or phosphorus source from medium decreased the biomass productivity significantly, caused chlorosis and reduction of protein content. Total lipid content increased slightly after phosphorous starvation and stayed almost constant under nitrogen starvation, however a greater TAG increase was observed during nitrogen starvation. Both nitrogen and phosphorous starvations caused the increase of the amount of reserve carbohydrates: during phosphorous starvation increase was insignificant, whereas the latter almost doubled the amount of reserve carbohydrates. The highest biomass and lipid productivity was observed in cells grown in bicarbonate supplement medium and the highest starch productivity was observed in cells grown in standard BBM-3N medium.","PeriodicalId":305989,"journal":{"name":"Issues of modern algology (Вопросы современной альгологии)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122478044","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Review of the long term research results using the author's method of graphical analysis 使用作者的图形分析方法回顾长期研究结果

Issues of modern algology (Вопросы современной альгологии) Pub Date : 1900-01-01 DOI: 10.33624/2311-0147-2019-2(20)-69-73

L. Razumovsky

引用次数: 0

Nitrogen-fixing cyanobacteria in the mountain-tundra ecosystems of the northern regions of the Urals (diversity, functional characteristics) 乌拉尔北部山地-冻土带生态系统中的固氮蓝藻(多样性、功能特征)

Issues of modern algology (Вопросы современной альгологии) Pub Date : 1900-01-01 DOI: 10.33624/2311-0147-2022-2(29)-57-64

E. Patova, M. Sivkov

引用次数: 0

Taxonomic diversity of the dominant cyanobacteria species during blooms in water bodies of Russia 俄罗斯水体水华期间优势蓝藻物种的分类多样性

Issues of modern algology (Вопросы современной альгологии) Pub Date : 1900-01-01 DOI: 10.33624/2311-0147-2022-2(29)-29-37

Z. Namsaraev, A. Melnikova

{"title":"Taxonomic diversity of the dominant cyanobacteria species during blooms in water bodies of Russia","authors":"Z. Namsaraev, A. Melnikova","doi":"10.33624/2311-0147-2022-2(29)-29-37","DOIUrl":"https://doi.org/10.33624/2311-0147-2022-2(29)-29-37","url":null,"abstract":"An analysis of information about the dominant cyanobacteria taxa during cyanobacterial blooms in the largest water bodies of Russia during the summer period was carried out. As a result, 32 species of cyanobacteria belonging to 17 genera were shown to be among the dominant species in inland water bodies. Of these, Aphanizomenon flos-aquae, Microcystis aeruginosa, Dolichospermum flos-aquae and Dolichospermum lemmermannii were the most frequently encountered taxa during blooms. In marine systems, representatives of 12 species belonging to 9 genera were observed. Among them Aphanizomenon flos-aquae, Trichormus variabilis, Dolichospermum flos-aquae, Microcystis aeruginosa and Nodularia spumigena were the most common. It is noted that Aphanizomenon flos-aquae, Microcystis aeruginosa and Dolichospermum flos-aquae have the widest distribution over the territory of Russia and are found both in water bodies of the Arctic zone of the Russian Federation and the south of the country, as well as in the distributed parts of coastal seas, while Dolichospermum lemmermannii is more typical of water bodies located in regions with subarctic or boreal climate, and is not found as a dominant in regions with temperate climate.","PeriodicalId":305989,"journal":{"name":"Issues of modern algology (Вопросы современной альгологии)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132474277","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Fossil diatoms from the Volga Delta Holocene sediments (Damchik region) as indicators of the paleoecological conditions of sedimentation 伏尔加河三角洲(Damchik地区)全新世沉积硅藻化石作为沉积古生态条件的指示物

Issues of modern algology (Вопросы современной альгологии) Pub Date : 1900-01-01 DOI: 10.33624/2311-0147-2019-2(20)-270-273

Yelena I. Shtyrkova, Y. Polyakova

引用次数: 0

Is the type of sexual process a generic characteristic? 性过程的类型是一种普遍特征吗?

Issues of modern algology (Вопросы современной альгологии) Pub Date : 1900-01-01 DOI: 10.33624/10.33624/2311-0147-2019-2(20)-190-193

O. Davidovich, N. Davidovich

引用次数: 0

Study of marine Paleogene diatom assemblages from the Kamchatka region: results of the last decade 堪察加地区海相古近系硅藻组合的研究:近十年的成果

Issues of modern algology (Вопросы современной альгологии) Pub Date : 1900-01-01 DOI: 10.33624/2311-0147-2022-1(28)-117-122

A. Gladenkov

引用次数: 0

Phylogeny and morphology of some species from the genus Gomphonema Ehrenberg 文章标题木耳属若干种的系统发育与形态

Issues of modern algology (Вопросы современной альгологии) Pub Date : 1900-01-01 DOI: 10.33624/10.33624/2311-0147-2019-2(20)-181-183

E. Kezlya, Y. Maltsev, A. Glushchenko, M. Kulikovskiy

引用次数: 0