The synthesis of gold nanoparticles (Au) using Galaxaura elongata (powder or extract) is demonstrated here. rapid formation stable Au has been found G. extract in aqueous medium at normal atmospheric condition. Transmission electron microscopy (TEM) analysis revealed that the particles are spherical shape along with a few rod, triangular, truncated triangular and hexagonal shaped nanoparticles. Zeta potential measurements indicated were size range 3.85–77.13 nm. Fourier transform infrared...

Silver nanoparticles (AgNPs) are gaining considerable importance due to their attractive physicochemical properties for many applications. In the present study, (Ag NPs) were synthesized by reduction of aqueous solutions silver nitrate (AgNO3) with powder and solvent extracts Padina pavonia (brown algae). The obtained exhibited high stability, rapid formation biogenic process (2 min -3 h), small size (49.58-86.37 nm) (the diameter formed was measured TEM DLS) variable shapes (spherical,...

The hexavalent chromium Cr(VI) poses a threat as hazardous metal and its removal from aquatic environments through biosorption has gained attention viable technology of bioremediation. We evaluated the potential use three green algae (Cladophora glomerata, Enteromorpha intestinalis Microspora amoena) dry biomass biosorbent to remove aqueous solutions. adsorption capacity was determined using batch experiments. appeared depend on pH. optimum pH with acid-treated for found be 2.0 at constant...

Marine macroalgae are plant-like organisms with simple internal structures that generally live in coastal areas. They mainly include different communities of red, brown and green macroalgae. commonly occupy intertidal sublittoral-to-littoral zones on rocks other hard substrata. considered to be an excellent natural biosource aspects agricultural fields. have great proficiency improving soil physical chemical properties. also characterized by producing a large array biologically active...

The primary goal of this work is to evaluate how BN and WC particles affect the mechanical properties damage development behaviours aluminum alloy-2048. Heat treatments for composites are also being investigated improve properties. Tensile experiments reveal that particle reinforcement outperforms in strength flexibility composites. T4 treatment, rather than traditional peak-aging recommended (T6). size distribution 10v% WC/Al-2048 best three with largest 16 µm 80% from 6 10 µm. tests...

The exploration of novel therapeutic agents and other bioactive secondary metabolite from

The emergence of antibiotic-resistant Streptococcus pneumoniae necessitates the discovery novel therapeutic agents. This study investigated antimicrobial potential green-synthesized gold nanoparticles (AuNPs) fabricated using Arthrospira platensis extract. Characterization Fourier transform infrared spectroscopy revealed presence functional groups such as ketones, aldehydes, and carboxylic acids in capping agents, suggesting their role AuNP stabilization. Transmission electron microscopy...

This study investigated the repellency effect and killing efficiency of castor garlic oils to control adults larvae red flour beetle, Tribolium castanium. The results obtained showed a significant plant on insect with higher repelling oil, which reached 100%, 20 minutes after treatment 30% concentration, as compared 100% for 30 at same concentration. also indicated superiority oil’s larval mortality (first, second, last instars), 86.6, 90.0 73.3%, 5 days different stages, respectively....

The contamination resulting from heavy metals present in industrial effluents represents a critical global challenge, posing profound risks to aquatic ecosystems and human health. Industrial activities worldwide release wastewater laden with toxic metals, prominently cadmium (Cd), into rivers, lakes, oceans, frequently surpassing permissible limits. Current treatment technologies are costly may produce secondary pollutants, thereby necessitating the urgent development of sustainable...

In this study, synthetic and biological soil conditioners were used to screen their abilities improvise the barren characters. These based on treatment of samples with urea / or compost as conditioner by inoculating Spirulina meneghiniana Zanrd. ex Gomon Anabaena oryzae Fritsch a conditioner. The data revealed that, in mixture (22.5 kg ha-1 22.5kg supplied 7.5 compost) was most effective one. Also, inoculated exhibited positive activity improving Moreover, highly significant responses...

Bio-synthesis of AgNPs (silver nanoparticles) by using the dry and solvent extract red marine alga Laurencia catarinensis was conducted in present work. Characterizations formed approved UV–Visible Spectroscopy, Transmission Electron Microscopy, Dynamic Light Scattering finally Fourier Transform Infrared spectroscopy. We achieved synthesis reduction aqueous solutions AgNO3 with powder catarinensis. Ag nanoparticles confirmed visual inspection. The obtained algal were characterized highly...

The present study aimed to isolate β-amyrin for the first time from Laurencia microcladia Kützing distributed at Dahab Coast, Aqaba Gulf, Egypt. successive extraction of ethanolic extract alga showed that, petroleum ether was best extractive solvent which contains isolated active compound. Based on IR, MS, and 1H NMR analyses, principle is proposed be triterpens having empirical formula C30H50O with a melting point range 191–194 °C. importance this draw attention economic different types...

The present study aimed to descry the effectiveness of dried microalga

This study examined the ability of green microalgae Chlorella vulgaris to remove arsenic from aqueous solutions. A series studies was conducted determine optimal conditions for biological elimination, including biomass amount, incubation time, initial level, and pH values. At 76 min, 6, 50 mgL-1 metal concentration, 1 gL-1 bio-adsorbent dosage, maximum removal an solution 93%. The uptake As (III) ions by C. reached equilibrium at min bio-adsorption. adsorptive rate 55 mg/gm. Langmuir,...

Five cyanobacterial species (Phormidium sp., Nostoc Anabaena sp. Aphanothece conferta, and Synechocystis aquatilis) isolated from the Suez Canal coast at city of Ismailia (Egypt) were tested for biodegradation four hydrocarbon (HC) compounds: two aliphatic compounds (n-octadecane pristine) aromatic (phenanthrene dibenzothiophene). High degradation efficiencies measured A. conferta (64% n-octadecane 78% S. aquatilis (85% 90% pristane). However, other percentages ranged between weak moderate...

This study aimed to isolate quercetin (for the first time) from Anabaena aequalis Borge, which inhabits soil surface of Wadi El-Alaqui Protectorate located in Aswan city, Egypt. The isolated compound showed significant antibacterial activity against gram-positive bacteria Sarcina maxima and Micrococcus kristinae, gram-negative bacterium Klebsiella pneumoniae, as well filamentous fungus Aspergillus flavus. was identified using structure elucidation based on UV, electrospray ionization mass...

The marine algal flora of the Umluj city received no attention about macroalgae. In this paper a total 19 species are reported for first time as occurring in coast Saudi Arabia. These related to Chlorophyta (1), Phaeophyceae (6) and Rhodophyceae (12).

Three organic extracts (chloroform, ethyl acetate and n-butanol) of ten cyanobacterial species (Anabaena solitaria, Anabaena variabilis, cylindrical, spiroides, circinalis, Oscillatoria ornate, salins, tenuis, rubescens prolifica) were investigated for their antibacterial activities against 4 fish pathogenic bacterial belonging to genus Aeromonas, namely, Aer. salmonicida, hydrophila, formicans liquefaciens using oxytetracycline as reference antibiotic. Of all samples, only A. variabilis...

This study is intended to evaluate the cytotoxicity of native and dual-modified black rice flour against colon cancer cell line (HCT116) mouse embryo (3T3-L1) by using MTT assay. The modification techniques applied prepare samples were enzymatic heat moisture treatment. In this study, IC50 modified was 255.78 µg/mL 340.85 µg/mL, respectively. result confirms that has significant cytotoxic anticancer potential human cells. addition, on 3T3-L1 found be 345.96 1106.94 results showed had weak...

Liposomes and niosomes can be considered excellent drug delivery systems due to their ability load all compounds, whether hydrophobic or hydrophilic. In addition, they reduce the toxicity of loaded without reducing its effectiveness. Synechocystis sp. is a unicellular, freshwater cyanobacteria strain that contains many bioactive compounds qualify use in industrial, pharmaceutical, other fields. This study investigated potential nano-liposomes (L) nano-niosomes (N) for delivering extract...

Heavy metals impose a potential threat against the aquatic environment.Lead (Pb 2+ ) and chromium (Cr 3+ are some of most prevalent toxic cations in wastewaters.In this study, two species brown seaweeds Hydroclathrus clathratus Cystoseira barbata were examined to remove Pb Cr ions from aqueous solution.The parameters that affect biosorption equilibrium capacity kinetics such as biomass dosage, pH, initial metal concentration, reaction time studied at room temperature.Results revealed both...

MARINE algae contain a variety of bioactive secondary metabolites and several compounds have been derived from them for prospective development novel drugs by the pharmaceutical industries. In this laboratory experiment Cystoseira barbata was isolated Red Sea coastal water (Safaga, Egypt). It evaluated due to its bioactivities potential. Where algal extract proved potent activity against bacterial fungal strains ranged between medium high suppression action. showed that Gram positive...