Md. Abu Affan

King Abdulaziz University · Department of Marine Biology

Microalgae have been got high attention due to its potentiality in aquaculture as live feed, and in industries as ingredients for pharmaceutical, cosmetics, and biofuel industries. The objective of this study was to know the optimum culture condition for profuse growth and biochemical composition of Tetraselmis suecica under two parameters: tempera...

Yanbu is considered one of the most important industrial and touristic areas on Saudi coast of the eastern side of the Red Sea. It is a developing and expanding city with modern facilities and industries which can affect the coastal environment and influence the qualitative and quantitative dynamics of the phytoplankton community. The present study...

A study was conducted to find out the possible reasons of fish killing at the Jeddah Coast, the Red Sea, Saudi Arabia. There are many factors for a sudden fish die-off in a water body such as toxic discharges, low dissolved oxygen (DO), temperature, salinity, pH, ammonia, turbidity, pesticides, toxins, and diseases. The study was carried out to fin...

The study assesses the safety of school against tsunami disaster of public elementary schools in Banda Aceh City, Indonesia, in terms of safety of school location, disaster management and disaster education. The findings indicate that 56% of public elementary schools in Banda Aceh City are exposed to high tsunami risk, and most externally driven sc...

Mangrove forests are known to be inhabited by diverse symbiotic cyanobacterial communities that are capable of N2 fixation. To investigate its biodiversity, root sediments were collected from a mangrove forest in Chuuk State, Federated States of Micronesia (FSM), and an entangled yellow-brown coccoid cyanobacterium was isolated. The isolated cyanob...

Algae play a very important role as feed and shelter for fish, crustacean and gastropods. Thus, this study was carried out to know dynamics of epiphytic microalgae and their host macroalgae of Florideophyceae at Jeddah coast, the Red Sea. The water temperature, salinity, pH and dissolved oxygen varied from 21.6 to 32.30°C, 36.40 to 39.70 ppt, 8.04...

This study was carried out to determine the water quality of a series of micro-pools water, north Jeddah Corniche, by studying the environmental variables as well as phytoplankton abundance and community structure. Surface water samples were monitored from a series of pools over two seasons; spring (May) and autumn (November), 2013. The pools are s...

Increased nutrients have led cyanobacteria to become dominant in many ponds, lakes and reservoirs in many countries of the world. The occurrence and abundance of cyanobacterial population were monitored in a lake (known as Isha Kha Lake) at Bangladesh Agricultural University campus, Mymensingh, Bangladesh. The hydrographic parameters such as water...

Water is one of the main sources for the needs of living things, which is indispensable in use for drinking, water and other industrial purposes. This study aim is to find out the condition of the well water in Meuraxa Sub-district of Banda Aceh city based on seven physical parameters that have been in test consisting of pH, TDS (Total Dissolved So...

Intertidal epilithic microalgae play very important role as feed of higher organisms. Taxonomical community composition of epilithic phytoplankton assemblages and their seasonal dynamics in relation to environmental factors were studied at Jeddah coast, the Red Sea. Temperature, pH and salinity varied from 21.60 to 32.30°C, 8.04 to 8.60 and 36.40 t...

Fewer studies have assessed the outdoor cultivation of Spirulina maxima compared with S. platensis, although the protein content of S. maxima is higher than S. platensis. Spirulina growth medium requires an increased amount of NaHCO3, Na2CO3, and NaNO3, which increases the production cost. Therefore, the current study used a low-cost but high-effic...

Diatoms are the principal food source for the abalone larvae before switching to eat macroalgae, but most of the diatoms culture systems rely on naturally occurring diatom species to supply live feed to juveniles. Monostrains of Navicula incerta Grunow and Grammatophora marina Ehrenberg benthic diatoms were cultured on wavy plastic plates (so calle...

Microalgae hold promise as producers of sustainable biomass for the production of biofuels and other biomaterials. However, selection of strains with efficient and robust production of desirable resources remains challenging. In this study, we isolated a green microalga from Korea and analyzed its morphological, molecular and biochemical characteri...

Cyanobacterial blooms commonly appear during the summer months in ponds, lakes and reservoirs in Bangladesh. In these areas, fish mortality, odorous water and fish and human skin irritation and eye inflammation have been reported. The influence of physicochemical factors on the occurrence of cyanobacteria and its toxin levels were evaluated in natu...

Geophysical techniques, an geo-electric method 2-D, has been general used for many year in groundwater exploration. The method is applied with drilling for determination of resistivity value and equifer depth. The result show that plain and hill was morphology characteristic in area which has relatively > 50 meter above sea level, and also the area...

A unicellular red microalga was isolated from environmental freshwater in Korea, and its morphological, molecular and biochemical properties were characterized, respectively. Morphological analysis revealed that the isolate was biflagellated unicellular green microalga with forming a non-motile, thick-walled palmelloid or red aplanospore. To determ...

Phytoplankton community composition and dynamics with physicochemical factors were investigated monthly on the western coast of Jeju Island, Republic of Korea. A total of 291 phytoplankton species were identified, cell abundance varied between 2.95-34.39 and 2.81-26.66 ×104 cells L-1, chlorophyll a between 0.19-1.56 and 0.07-1.51 µg L-1 at bottom a...

Ultraviolet-B (UV-B) irradiation has been known to generate oxidative stress by increasing reactive oxygen species (ROS) in skin cells. Several naturally occurring antioxidant compounds isolated from marine algae are believed to protect against ROS. In this study, we assessed the antioxidative effect of eckstolonol isolated from Ecklonia cava again...

Physical and mechanical properties of wood are important criteria for selection anddesigning of wood constructions. However, chemical treatment of wood sometimes mayalter its physical and mechanical properties. This study investigated the physical andmechanical properties of tropical wood treated with novel organotin(IV) complexes. Threeselected tr...

Pylaiella littoralis was collected in the Chuuk lagoon of the Federated States of Micronesia (FSM). The FSM has a variety of coral reef ecosystems, which provide essential materials, such as minerals, vitamins, essential amino acids, for marine organisms. In this study, the antioxidant activities of ethanol and enzymatic extracts of P. littoralis w...

The present study is designed to investigate the neuroprotective effect of a kind of phlorotannins, diphlorethohydroxycarmalol (DPHC) isolated from Ishige okamurae against hydrogen peroxide (H(2)O(2))-induced oxidative stress in murine hippocampal neuronal cells, HT22. H(2)O(2) treatment induced neurotoxicity, whereas DPHC prevented cells from H(2)...

In this study, we isolated xylan-degrading bacteria from a coastal lagoon of Micronesia and identified the bacteria as Marinobacterium stanieri S30. GSFLX 454 pyrosequencing and sequence analysis of the M. stanieri S30 genome generated 4,007 predicted open reading frames (ORFs) that could be candidate genes for producing enzymes with different cata...

Carbon capture and storage have involved high cost and an earthquake threat. Coal in NaOH-natural seawater (NSW) can produce clean coal, and organic carbon enriched pretreated sweater (PSWS) can be used to grow Spirulina maxima. However, with freshwater shortage, high cost CO2 feedstock incurs S. maxima biomass production, and using PSWS should be...

An agar-degrading marine bacterium identified as a novel member of the family Flavobacteriaceae (strain S85) was isolated from seawater in Micronesia. The sequenced strain S85 genome is composed of 3,384,629 bp in a circular chromosome, which includes 2,883 complete open reading frames.

We report here the annotated genome sequence of the marine bacterium Alteromonas sp. S89 and the identification of six genes coding for agar-degrading enzymes. The sequenced Alteromonas sp. S89 genome is composed of a 3,864,871-bp circular chromosome that includes 3,236 complete open reading frames.

We isolated Mesoflavibacter zeaxanthinifaciens S86 as xylanase-producing bacteria from seawater sampled in Micronesia. Analysis of the M. zeaxanthinifaciens genome revealed that it contains a single circular chromosome of 3,704,661 bp with 3,249 putative open reading frames.

A Bacillus subtilis strain was isolated from the intestine of Sebastiscus marmoratus (scorpion fish) that was identified as Bacillus subtilis CH2 by morphological, biochemical, and genetic analyses. The chitosanase of Bacillus subtilis CH2 was best induced by fructose and not induced with chitosan, unlike other chitosanases. The strain was incubate...

In this study, the potent anti-tumor effects of brown algae on human leukemia HL-60 cells were investigated. The Sargassum siliquastrum extract among the 14 species of brown algae exhibited profound growth inhibitory effect on HL-60 cells in the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay, therefore, S. siliquastrum was...

In this study, potential anti-inflammatory effect of fucoxanthin isolated from brown algae was assessed via inhibitory effect of nitric oxide (NO) production in lipopolysaccharide (LPS) induced RAW 264.7 macrophage cells. The Myagropsis myagroides was selected for further experiments due to its profound NO inhibitory effect, and was partitioned wit...

In this study, potential inhibitory effect of 21 species of marine algae on melanogenesis was assessed via tyrosinase inhibitory effect. The Ishige okamurae extract tested herein evidenced profound tyrosinase inhibitory effect, compared to that exhibited by other marine algae extracts. Thus, I. okamurae was selected for use in further experiments,...

We isolated the unialgal strain of Cylindotheca closterium (Ehrenb.) Reimann et J. C. Lewin and produced an axenic strain using an antibiotic cocktail of enriched f/2 artificial seawater medium. The optimal growth conditions were estimated under 27 different combinations of temperature, salinity, and nutrients, and mass culture was performed based...

Recently, interest in plant-derived food additives has developed natural antioxidants, in order to alternate synthetic antioxidants with several disadvantages. In the present study, different organic fractions from solvent partitions of 80% methanol extract from Jeju benthic diatoms, Achnanthes longipes, Navicula sp. and Amphora coffeaeformis wa...

In this study, we focused on natural water-soluble antioxidants from the Jeju benthic diatoms, Achnanthes longipes, Navicula sp. and Amphora coffeaeformis. They were prepared by enzymatic digestion using five carbohydrases (Viscozyme, Celluclast, AMG, Termamyl and Ultraflo) and five proteases (Protamex, Kojizyme, Neutrase, Flavourzyme and Alcalase)...

The enzymatic extracts from seven species of microalgae (Pediastrum duplex, Dactylococcopsis fascicularis, Halochlorococcum porphyrae, Oltmannsiellopsis unicellularis, Achnanthes longipes, Navicula sp. and Amphora coffeaeformis) collected from three habitats (freshwater, tidal pool, and coastal benthic) at Jeju Island in Korea were investigated for...

Benthic diatoms are a commonly used food source in shellfish aquaculture. Diatoms of the genus Navicula are the most abundant benthic diatoms occurring year-round on the coast of Jeju Island, Korea. We isolated an axenic strain of N. incerta Grunow; estimated its growth characteristics under 27 different combinations of temperature, salinity, and n...

The dynamics of phytoplankton abundance with seasonal variation in physicochemical conditions were investigated monthly at 10 stations around the Chagwi-do off the west coast of Jeju Island, Korea, including inshore, middle shore, and offshore in the marine ranching area from September 2004 to November 2005. Water temperature varied from 12.1 to 28...

The enzymatic extracts from seven species of micro-algae (Pediastrum duplex, Dactylococcopsis fascicula-ris, Halochlorococcum porphyrae, Oltmannsiellopsis unicellularis, Achnanthes longipes, Navicula sp. and Amphora coffeaeformis) collected from three habi-tats (freshwater, tidal pool, and coastal benthic) at Jeju Island in Korea were investigated...

Benthic diatoms are a commonly used food source in shellfish aquaculture. Diatoms of the genus Navicula are the most abundant benthic diatoms occurring year-round on the coast of Jeju Island, Korea. We isolated an axenic strain of N. incerta Grunow; estimated its growth characteristics under 27 different combinations of temperature, salinity, and n...

Benthic diatoms are known as a good food for shellfish in nature and in commercial hatchery of Jeju Island, Korea. Grammatophora marina is commonly found as dominant benthic micro-algae in Jeju coastal waters throughout the year. To know the best growth conditions of this species, culture was done in terms of three parameters; water temperature, sa...

As spring and summer blooms of cyanobacteria are very .common in many ponds, lakes and reservoirs of Bangladesh, the occurrence and abundance of cyanobacteria population and environmental parameters were examined in Isha Khan lake of Bangladesh Agricultural University (BAU), Mymensingh, Bangladesh from February to April to see how environmental fac...

A study on the seasonal changes in the phytoplankton community was carried out in four aquaculture ponds of Bangladesh over a period of 16 months from August 2000 to November 2001. Out of 45 phytoplankton species identified, 30 belong to Cyanophyceae, 7 to Chlorophyceae, 5 to Bacillariophyceae and 3 to Euglenophyceae. The highest phytoplankton abun...

A study on seasonal characteristics of phytoplankton dynamics and environmental factors was carried out at four stations including Mara-do and U-do located in the western and eastern coast of Jeju Island in southern Korea from April 2003 to March 2004. Out of 101 phytoplankton species identified, 84 belong to Bacillariophyceae, 9 Dinophyceae, 6 phy...

Cyanobacterial bloom and fish mortality in ponds and lakes are common in Bangladesh but the relationship between the two has been rarely studied. In April 2002, mass mortality of fishes occurred in a farmer’s pond of Mymensingh, Bangladesh. At the time of fish kill, a massive bloom of cyanobacteria (210.5×10³ cells ml‾<sup>1...

INTRODUCTION Cyanobacterial blooms have become common phenomena in ponds, lakes and reservoirs in Bangladesh. Some of the species, e.g., Microcystis aeruginosa, Anabaena flos-aquae, Aphanizomenon flos-aquae are ubiquitous, and among them Microcystis and Aphanizomenon are found to dominate continuously in warmer, shallow and eutrophic ponds and lak...

On 6 April 2002, mass mortality of fishes occurred in fish farmers’ pond of Mymensingh district, Bangladesh. Two goats were died after drinking water from the bloom forming pond and the peoples swimming in that pond suffered from serious skin rashes and eye and ear irritations. Though fish mortality and animal death are common in Bangladesh, there...