Algae

Resting egg production of rotifers provides critical advantages in larviculture of most fish species due to the reduction in the costs of labour and algae production. The study was conducted to investigate the effects of temperature on population growth and resting egg production of a freshwater rotifer, Brachionus calyciflorus, collected in Northern Vietnam.

8p vibecca 01-10-2024 2 2   Download

The rhizosphere microorganisms can form beneficial, pathogenic, or neutral relationships. These relationships can promote plant growth and productivity. Among them, a number of Variovorax isolates from the rhizosphere were isolated. Bacteria Variovorax strain C6d (AB552893) was isolated from the non axenic culture of Chlorella spp., C6.

8p vibecca 01-10-2024 4 2   Download

Harvesting microalgae by centrifugation and filtration is very costly, affecting technical and economical feasibility of downstream processing of algal biomas to bioproducts. Flocculation is a potential technique for recovery of algae biomass. Particularly, flocculation using magnetic nanoparticles offers high separation efficiency due to their high surface area and magnetic properties. I

10p dianmotminh02 03-05-2024 5 1   Download

The focus of this thesis was to study the chemotaxonomic relationship of selected southern Australian marine brown algae of the genera Cystophora and Sargassum. Consequently, this resulted in the isolation and structure elucidation of six new terpenoids from two southern Australian marine brown algae Cystophora moniliformis and Sargassum fallax together with 10 previously reported natural products. As a result of the re-isolation of these known secondary metabolites, updated and complete structural characterisation data could be provided for the first time for 7 of these compounds.

132p runthenight07 01-03-2023 7 3   Download

The primary objectives of this study were to: Investigate the fouling potential, and characterise the organic components of the membrane foulant layers, of clarified activated sludge and lagoon effluent obtained from the WTP; Investigate the fouling propensities of EOM and AOM derived from a blue-green algal culture as it passed through the growth cycle, ie., for which the cells had not been subject to physical disruption; Determine any difference in the fouling propensity of EOM and AOM and relate it to organic composition.

99p runthenight07 01-03-2023 3 3   Download

In conclusion, symbiotic algae tend to be species-specific, whereas bacteria fluctuate significantly over sampling time. Studying the molecular issues of microalgae, the presence, the role of some groups of bacteria involved in the N, C, P, and S cycles, and the influence of environmental parameters should also be encouraged to understand the relationship of coral holobiont better.

12p vipagani 24-10-2022 9 3   Download

Green synthesis method is being increasingly used in the development of safe, stable, and eco-friendly nanostructures with biological resources. In this study, extracellular and intracellular synthesis of gold nanoparticles (AuNPs) was carried out using green algae Chlorella sorokiniana Shihira & R.W. Fresh algae were isolated and identified from Musaözü Pond located in the province of Eskişehir and then extraction process were performed.

18p thiencuuchu 27-11-2021 11 3   Download

The purposes of the dissertation: Preparation of low molecular weight sodium alginate from brown algae in Nha Trang Bay which has anticoagulant activity as a raw material for functional food production.

36p tunelove 11-06-2021 23 3   Download

Study on process of extracting and receiving protein concentrate from Chaetomorpha sp. Investigate the biological properties, functional properties and nutritional value of protein concentrate from algae for application in food.

28p capheviahe27 23-02-2021 28 4   Download

The research goals of the dissertation: The research separates, identifies structural characteristics and tests biological activity of fucoidan from several brown algae growing up in Vietnamese Seas to serve for investigating Vietnamese natural sea compound resources and making clear the chemical nature of research objects.

26p xacxuoc4321 09-07-2019 29 6   Download

The bioflocculation efficiency was depended on the pH, carbon sources, the initial algae concentrations, bacteria strains, and the inital bioflocculant-producing bacteria concentrations. The temperature lightly affected the bioflocculation, no noticeable behavioral or activity changes were observed in mice that were orally administrated with four bacterial strains, and no treatment-related illness or death occurred after 72 hours.

13p shiwo_ding7 05-06-2019 19 3   Download

The objective of this study was to investigate the effects of positive ferric-bubble on behaviors of chain-like and pin-like algae (i.e. Phormidium specie (sp.) and Nitzchia pungens, respectively). Two selected algae were cultured in a laboratory under the certain conditions. At stationary phase, algae were below 4 µm in diameter and in the range of 50 ~ 100 µm for chainlike algae, of 20 – 35 µm for pin-like shape in length; with negatively charged at cultivated conditions (pH from 6.5 to 9).

6p cumeo3000 01-08-2018 21 0   Download

Diversity of algae species in Xuan Huong lake, Dalat. Xuan huong Lake is considered the heart of Dalat. In this study, algal abundance and diversity in Xua nhuong Lake were studied. Water samples were collected from four different sampling sites from September 2012 to January 2013.

8p lehasiphuong 22-05-2018 27 1   Download

Bài giảng "Cổ sinh vật học - Chương 12: Các ngành thực vật cấp thấp" giới thiệu các ngành Bacteriophyta (Vi khuẩn), các ngành Algae (Tảo), ngành Fungi (Nấm), ngành Nematophyta (Thực vật dạng sợi). Mời các bạn cùng tham khảo.

18p deja_vu10 29-03-2018 83 4   Download

Tảo lam (blue-green algae) hay còn gọi là vi khuẩn lam (Cyanobacteria) là một ngành tảo tương đối đa dạng về mặt giống, loài và nơi phân bố. Tảo lam hiện diện hầu hết ở các thủy vực nước ngọt, lợ, mặn vàkể cả môi trường trên cạn, góp phần vào sự đa dạng sinh học của quần xã thủy sinh vật và hệ sinh thái dưới nước. Bài viết trình bày kết quả nghiên cứu các thành phần loài tảo này.

6p nguyenthilamha 09-04-2017 97 11   Download

Bài giảng "Chỉ thị sinh học môi trường: Chỉ thị sinh học môi trường nước (Phần 5: Tảo)" cung cấp cho người học các kiến thức: Vai trò, ý nghĩa của tảo; khái quát về tảo (Algae), thực vật bám (Periphyton), tảo là sinh vật chỉ thị (Algae as Indicators). Mời các bạn cùng tham khảo.

14p doinhugiobay_10 12-01-2016 241 53   Download

Cá hắc bạc (hay bút chì) có thân tròn, thon dài, mõm đầu nhọn (tựa đầu bút chì), dọc thân có 1 sọc đen nổi bật chạy từ đầu ngực đến hết tia giữa vây đuôi (tựa ruột bút chì). Mặt lưng màu xám đen đối lập với mặt bụng trắng bạc (nên còn gọi là cá hắc bạc). Miệng cá nằm dưới, có nhiều mấu dạng tua và gai thịt để nút tảo bám. Phân bố Nguồn gốc: Cá hiện được nhập lượng nhiều từ Thái Lan, nguồn cá chủ yếu từ khai thác tự nhiên. Cá cũng khai...

4p vuvonp 13-06-2013 71 1   Download

Là những sinh vật nhỏ bé không thể nhìn thấy hoặc khó nhìn thấy bằng mắt thường, có thể được chia ra thành 5 nhóm như sau: Nhóm vi khuẩn (bacteria), nhóm bào tử nấm (fungi), nhóm tảo - thực vật phiêu sinh (algae), nhóm phiêu sinh động vật (zooplankton) và nhóm cuối cùng là virus (viruses). Nhóm của các sinh vật nhỏ bé này có ý nghĩa quan trọng đối với hệ sinh thái trong ao nuôi đó là nhóm vi khuẩn và vi tảo....

3p lichxanh 06-06-2013 93 5   Download

Chlamydomonas reinhardtii, a unicellular green alga, contains a hydrogenase enzyme, which is induced by anaerobic adaptation of the cells. Using the suppression subtractive hybridization (SSH) approach, the differential expression of genes under anaerobiosis was analyzed. A PCR fragment with similarity to the genes of bacterial Fe-hydrogenases was isolated and used to screen an anaerobic cDNA expression library of C. reinhardtii.

11p research12 01-06-2013 41 6   Download

Lamjapin,anoveltypeIribosome-inactivating protein, has been isolated from kelp (Laminaria japonicaA), a marine alga. This protein has been extensively purified through multiple chromatography columns. With a molecular mass of
36 kDa, lamjapin is slightly larger than the other known single-chain ribosome-inactivating proteins from the higher plants. Lamjapin can inhibit protein synthesis in rabbit reticulocyte lysate with an IC50 of 0.69 nM.

7p research12 23-04-2013 30 2   Download