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  • Zivan Gojkovic
Zivan Gojkovic

Zivan Gojkovic
Universidad de Huelva | UHU · Departamento de Química y Ciencia de Materiales "Profesor José Carlos Vílchez Martín"

PhD

About

20
Publications
6,158
Reads
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523
Citations
Citations since 2017
14 Research Items
487 Citations
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2017201820192020202120222023050100150
2017201820192020202120222023050100150
Additional affiliations
July 2019 - November 2020
Instituto Tecnologico de Canarias Pozo Izquierdo Gran Canaria Spain
Position
  • Tecnico superior
Description
  • Mass outdoor cultures of marine microalgae
March 2016 - June 2019
Umeå University
Position
  • Researcher
Description
  • Microbiorefine project with northern green microalgae
May 2015 - January 2016
Wageningen University & Research
Position
  • Researcher

Publications

Publications (20)
Article
Full-text available
Methylmercury (MeHg) is the most important and the most abundant organic Hg pollutant in the aquatic ecosystem that can affect human health through biomagnification. It is the most toxic organic Hg form, which occurs naturally and by human-induced contamination in water and is further biomagnified in the aquatic food web. MeHg is the only Hg form t...
Article
Full-text available
Microalgae cultivation is a promising alternative to traditional agriculture in arid—semi-arid areas. The aim of this study is to assess the viability of long-term cultivation of native Arthrospira platensis in Gran Canaria. Maximum culture productivity (0.08 g/L/day) and optimal concentration range (0.6–0.9 g/L) were firstly determined in 8000 L r...
Article
Full-text available
The goal of this study was to determine the feasibility of the large-scale cultivation of locally isolated Tetraselmis striata in different open ponds in Gran Canaria. The biomass productivities were 24.66 ± 0.53 kgDW in 32 days (28.9t/ha/year) for 8000 L indoors, 42.32 ± 0.81 kgDW in 43 days (38.8 t/ha/year) for an 8000 L pond outdoors, and 54.9 ±...
Article
Active pharmaceutical ingredients (APIs) are vital to human health and welfare, but following therapeutic use, they may pose a potential ecological risk if discharged into the environment. Today´s conventional municipal wastewater treatment plants are not designed to remove APIs specifically, and various techniques, preferably cost-effective and en...
Article
Full-text available
Green microalgae are widely used for wastewater treatment, food/feed and pigment production, as well as for aquaculture. However, very little is known about their surface composition, which can determine algae behavior in nature and influence their processing. In this work, we use cryo-XPS to characterize the surface chemical composition of three d...
Article
The flotation properties of two green microalgal species isolated from Northern Sweden, Chlorella vulgaris 13-1 and Coelastrella sp. 3-4, were investigated. C. vulgaris 13-1 is a flotating alga that remains suspended in solution during culturing, while Coelastrella sp. 3-4 is readily sedimenting in the stationary growth phase. We were the first to...
Article
Five newly isolated green algal species from Northern Sweden and one culture collection strain were tested for their ability to remove nitrogen and accumulate carbohydrates and neutral lipids (TAGs) under progressive nitrogen starvation. All six microalgal species increased biomass during N starvation, the amount of proteins decreased, and species...
Article
Cellular uptake of dissolved methylmercury (MeHg) by phytoplankton is the most important point of entry for MeHg into aquatic food webs. However, the process is not fully understood. In this study we investigate the influence of chemical speciation on rate constants for MeHg accumulation by the freshwater green microalga Selenastrum capricornutum....
Article
The subarctic green algal strain Chlorella vulgaris 13-1, newly isolated from Northern Sweden, and its co-occurring bacterium Rhizobium sp. were tested for their ability to produce valuable biomass and remove nutrients from synthetic wastewater during mixotrophic feed-batch cultivation at multiple hydraulic retention times (HRTs = 7, 5 and 3 days)....
Article
Full-text available
Attenuated total reflection-Fourier transform infrared (ATR-FTIR) spectroscopy is a simple, cheap, and fast method to collect chemical compositional information from microalgae. However, (semi)quantitative evaluation of the collected data can be daunting. In this work, ATR-FTIR spectroscopy was used to monitor changes of protein, lipid, and carbohy...
Article
The Nordic microalgal strain Haematococcus pluvialis was exposed to various stress conditions to induce astaxanthin accumulation. Highest carotenoid content (19.1 mg·g-1dw) was achieved in nitrogen-free culture medium at a high light intensity. The efficiency of Pulsed Electric Field (PEF) pre-treatment of stressed fresh biomass of H. pluvialis fol...
Article
Eight recently isolated microalgal species from Northern Sweden and the culture collection strain Scenedesmus obliquus RISE (UTEX 417) were tested for their ability to remove 19 pharmaceuticals from growth medium upon cultivation in short light path, flat panel photobioreactors. While the growth of one algal species, Chlorella sorokiniana B1-1, was...
Article
Full-text available
Algae are without doubt the most productive photosynthetic organisms on Earth; they are highly efficient in converting CO2 and nutrients into biomass. These abilities can be exploited by culturing microalgae from wastewater and flue gases for effective wastewater reclamation. Algae are known to remove nitrogen and phosphorus as well as several orga...
Article
The complex role of selenium (Se) in living organisms can be assessed by studying physiological, biochemical and molecular aspects of its effects on lower organisms. This review aims to summarise the impact of Se on green algae (Chlorophyta), with regard to its uptake, bioaccumulation and toxicity. It will provide a better insight into the cellular...
Article
Microalgae are definitely on the way to becoming a sustainable, easily reproduceable natural green source for highly demanded market products. Research is currently looking at promising, outstanding applications of microalgae, among which production of functional foods enriched in microalgal healthy bioactive molecules, novel fuels produced from mi...
Article
Microalgae are definitely on the way to become a sustainable, fast growing natural green source for highly demanded market products. Research is currently looking at promising outstanding applications of microalgae among which are the production of biofuels from the fatty acids present in biomass, functional foods enriched with microalgae healthy b...
Article
Full-text available
The aim of this work was to study the effect of Se(+VI) on viability, cell morphology, and selenomethionine accumulation of the green alga Chlorella sorokiniana grown in batch cultures. Culture exposed to sublethal Se concentrations of 40 mg·L(-1) (212 μ M) decreased growth rates for about 25% compared to control. A selenate EC50 value of 45 mg·L(-...
Article
Use of traditional sources of collagen such as pork, bovine and carp has some limitations. Chicken skin can be valuable alternative. In this work collagen was isolated from chicken skin using modified procedure. Molecular properties of chicken collagen were analyzed and compared to collagen from other animal skins. Acid soluble collagen type I was...
Article
This article describes the enrichment of the fresh-water green microalga C. sorokiniana in selenomethionine (SeMet). The microalga was cultivated in a 2.2 L glass-vessel photobioreactor, in a culture medium supplemented with selenate (SeO42-) concentrations ranging from 5 to 50 mg∙L-1. Although selenate exposure lowered culture viability, C. soroki...
Article
Full-text available
Fats, oils and greases in waste water frequently cause serious environmental problems. A commercial preparation was tested for its ability to degrade oil and grease in wastewater. As substrates, two fats (lard and beef fat) and four oils (rape seed oil, sunflower oil, palm oil and olive oil) were chosen. The degradation ability of commercial prepar...

Questions

Question (1)
Question
I need urgent advice on an appropriate journal to publish a review (10-15 pages) on certain metalloid/micronutrient effects on microalgae. If anyone can suggest a journal that takes no longer than 3 months to publish, that is free of charge, and has an IF of 1.0 to 1.5 it would be appreciated. Need urgent help, its important to publish before May. If you can also recommend journals that charge publications but have special offers for one month of free publishing and so on. Thanks in advance

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Projects

Projects (5)
Project
https://www.mdpi.com/journal/phycology/special_issues/JXR79O7OSV Dear colleagues here is the link to the special issue of MDPI journal Phycology dedicated to biotechnology and industrial application of Extremophilic Microalgae Phycology is a new MDPI journal dedicated exclusively to plant and algae. As it's new it doesn't have IF yet. Some of the most prominent algal researchers already published in Phycology. Next year it will be assigned IF that will most certainly be as high as in other MDPI biology related journals. You are all welcome to contribute with related research. Ten most promising papers can apply for a great reduction of article processing charges. Contact me for more details. Deadline for submission is 30th of April 2023. With regards Zivan
Project
Este proyecto tiene como objetivo generar una comprensión detallada de los efectos de los referidos parámetros sobre la absorción, toxicidad y complejación de MeHg en cultivos de microalgas marinas y de agua dulce, seleccionadas para esta propuesta. Los resultados de este proyecto podrían utilizarse para predecir la transferencia de MeHg y su toxicidad en aguas naturales de Andalucía (ríos, lagos, aguas salobres y Atlántico) en función de la concentración de MeHg y del tamaño de la población de fitoplancton (microalgas), y permitirían tomar evaluar y tomar decisiones anticipadas en relación con el riesgo del uso de reservas y flujos de agua. Estos resultados serían útiles para la comunidad andaluza orientada al mar que consume grandes cantidades de pescado y marisco capturados localmente. Financiado por: FEDER program of Andalusia (Spain) 2014–2020, grant number UHU–202065