فهرست مطالب عمار مریم آبادی

The biomedical and nutraceutical effects of sea lettuce, scientifically known as Ulva lactu-ca, are well known in scientific literature. Considering the nutraceutical effects of this marine organism and the abundance of this algae on Bushehr coasts, one of the objectives of this study was to investigate some phytochemical, nutraceutical, and antioxidant properties and the chemical components of sea let-tuce obtained from the Persian Gulf coasts (Bushehr, Iran).

After sample collection and preparation, some phytochemical properties, includ-ing the fatty acid profile, amino acid profile, secondary metabolites, and antioxidant activity were respec-tively determined using standard AOAC methods to Cd 86-90 and Cd 3-25, gas chromatography flame ionization detector (GC-FID), high performance liquid chromatography (HPLC), gas chromatography-mass spectrometry (GC-MS) and free radical scavenging (DPPH) methods.

The analysis of fatty acids revealed 17 types of fatty acids consisting of significant amounts of Omega 3, 6, and 9, while the amino acid analysis revealed 19 types of amino acids containing significant amounts of essential amino acids (37%). Additionally, the GC-MS results identified 31 secondary metab-olites with different functional groups and nuclei. Sea lettuce showed higher antioxidant activity than the ascorbic acid standard at different concentrations.

According to the results, Persian Gulf Sea lettuce contains nutritional compounds and useful primary and secondary metabolites with nutraceutical and biomedical effects for use as a food supple-ment. This marine organism is also a rich source of many bioactive compounds such as phenolics, alka-loids, amino acids, and saturated and unsaturated fatty acids.

Population growth and pollution caused by the discharge of all kinds of urban, industrial, and agricultural sewage, leachate from landfills, and surface water runoff cause an increase in pollution of water sources. The entry of heavy metals into the environment, especially aquatic ecosystems, due to entering the food chain and jeopardizing human health is one of the concerns of society. This study was conducted to determine the level of heavy metals in muscles of Cynoglossus arel and Pomadasys kaakan fishes in Boushehr coastal waters, north of the Persian Gulf.

This descriptive study was conducted on twenty pieces of Cynoglossus arel and twenty pieces of Pomadasys kaakan fishes take place from three coastal stations of Boushehr, north of the Persian Gulf, Iran during spring of 2022. The samples were randomly selected from the fish market. After preparation, bioassay, and digestion of fish muscle by concentrated nitric acid, the concentration of heavy metals including nickel, zinc, copper, lead, and cadmium (µg/g) in the muscle tissue was measured by ICP-OES device. The concentration of heavy metals in the fish muscle tissue for human consumption was compared with international standards (FAO, WHO, FDA, NHMRC, and UKMAFF). According to the method of the US Environmental Protection Agency for fish consumption, daily absorption estimates and heavy metal risk indicators were calculated.

The risk potential index for both species was less than one. The daily and weekly absorption of Cynoglossus arel (zinc > copper > nickel > lead > cadmium) and Pomadasys kaakan (copper > zinc > nickel > lead > cadmium) were determined. The mean concentration of heavy metals nickel, zinc, copper, lead, and cadmium in the muscle tissue of the studied species was determined to be 1.88±0.07, 27.16±8.11, 11.55±4.12, 1.14±0.06, and 0.19±0.03 µg/g, respectively. The highest amounts of studied metals in aquatic animals were zinc > copper > nickel > lead > cadmium. The concentration of metals in the analyzed samples was lower than the international standards.

Regarding toxicity, the concentration of metals in Cynoglossus arel and Pomadasys kaakan was evaluated as acceptable for human consumption. In addition, the amount of risk potential and risk index for non-cancerous diseases in adults and children in fish muscle tissue was less than 1, and the consumption of this fish does not cause any problems for human health.

Brittle stars can produce well-known toxins responsible for various of their biological activities in addition to their physical defense. The purpose of this study was to identify secondary metabolites and assess the anticholinesterase activities of the crude venom of the Persian Gulf Ophiocoma erinaceous (brittle star) in vitro and in silico due to the abundance of this marine life on the Persian Gulf coasts and with knowledge of their numerous biological effects.

In this study, after the lyophilization of the brittle star sample, an LD50 test, a test of cholinesterase inhibitory activities, identification of the secondary metabolites, and their in-silico evaluations were performed by, respectively, Spearman-Karber, the Ellman spectroscopic method, Gas Chromatography–Mass Spectrometry (GC-MS), and computational docking method.

According to the results, the LD50 value of the sample was 6.04±0.13 (mg/kg). The IC50 values related to their Acetylcholinesterase and  Butyrylcholinesterase were 37.925 ±0.055 and 5.388±0.02 (μg/ml), respectively, compared to the galantamine standard. The GC-MS analysis of the sample showed 25 bioactive chemical compositions with different structures, such as alkaloids, terpenes, and steroids. The computational results of the compounds also confirmed the experimental results. Among these, the alkaloidal compound BS4, had the highest affinity for both enzymes.

As for toxicity potency, the brittle star crude venom sample was classified in the highly toxic category. The GC analysis of the crude venom showed various bioactive secondary metabolites with different chemical structures. The experimental and computational results on the anticholinesterase activities of the sample showed that the venom acts as a significant inhibitor of both enzymes. Further studies are required to determine whether the compound BS4 could be a candidate for the treatment of Alzheimer’s disease.

Chlorpyrifos (CPF), an organophosphate pesticide, has been widely used in the agricultural industry and may cause environmental damage. The present study aimed to evaluate the potential application of Fe(VI) and Fe(VI)/PMS processes for oxidation of CPF in water after pretreatment with ferric chloride coagulant.

This study was performed in two phases including coagulation and flocculation process and advanced oxidation process (AOP). In the first phase, the coagulation process was performed for turbidity removal by ferric chloride (FeCl3). In this phase, using a central composite design (CCD) with R software, the combined effect of four variables including initial turbidity, initial pH, coagulant dose and contact time was investigated. The supernatant from this process was transferred to the next phase for further analysis. In the AOP phase, the effect of Fe(VI) and Fe(VI)/PMS oxidants were investigated separately.

In the first phase (coagulation and flocculation), FeCl3 showed the highest efficiency (95.79%) at alkaline pH (pH=8). In the next phase (AOP), the results showed that the degradation efficiency of Fe(VI)/PMS process was higher compared to sole Fe(VI) process at all pHs. Also, by examining the reaction kinetics, it was found that after the coagulation process by FeCl3, the removal rate in the Fe(VI)/PMS process is 1.5 times higher than the Fe(VI) process.

Due to the high removal efficiency and higher degradation rate of Fe(VI)/PMS process, this technique can be used as a relatively effective method in removing chlorpyrifos from aqueous solution.

Most cephalopods are venomous organisms whose major venom constituents include protein toxins, small toxic molecules, enzymes, and amines. Neurotoxic cephalotoxins are protein toxins that were first isolated from this family. They are categorized into SE-cephalotoxins, α-cephalotoxins, and β-cephalotoxins. The SE-cephalotoxin compound is roughly a thousand-fold more toxic than other members of the group. Among the small toxic molecules, tetrodotoxins and tachykinins can be mentioned. Salivary tachykinins of cephalopods can cause severe hypotension and contraction of gastrointestinal muscles in vertebrates. The peptide derivatives of tachykinins in the cephalopod brains have more toxic effects than the simple tachykinins. Chitinases, phospholipases and acetylcholinesterase are the most important integral components of the cephalopod venom. Phospholipase A2 plays an important role in fat metabolism, in the progression of some diseases, as well as the neurotoxic and myotoxic effects of the venom. Acetylcholinesterase inhibits the stimulation of muscarinic receptors. In addition to epinephrine, norepinephrine, dopamine, serotonin, and histamine, one of the most abundant amines found in octopus saliva is "octapamine". The inks of many species of cephalopods contain significant amounts of melanin, which, in addition to biotechnological applications, have antifungal, antibacterial and anti-cancer effects. Insoluble globules of the complex skin system of cephalopods contain proteins called "reflectin", which are responsible for producing a wide range of colors. Reflectins are exclusively found in cephalopods. In fact, the existing toxinological and biotechnological studies of the venom of this marine life are not commensurate with their diversity as well as their unique composition, and more efforts are needed to succeed in this field.

Although the widespread distribution of venomous marine worms around the world, the structural and toxinologcal studies of their toxins are still limited.This study was aimed to evaluate the toxicity of poisonous marine worms. Touching the cilium of Chloeia flava and Sipuncula marine worms cause painful inflammation of the skin. Many species of nemertines prey their victims by a flexible proboscis and dense mucus on the surface of the skin. They have recently been classified into three groups of the Palaeonmertea, Pilidiophora, and Hoplonemertea. Their toxins comprise the three main groups of peptides, pyridine alkaloids, and tetradotoxin and their derivatives. The nicotinoide amphiporine compound, anabaseine and its derivatives, Nemertelline, and anabasine are as alkaloid toxins. They are selectively stimulated the  nicotinic receptors, in particular the type of α-7 receptors. Nemerteans are produced a variety of peptide toxins.The hemolytic activity is the most prominent activity of the cerebratulus toxins A-I to A-IV. Cytotoxin A-III, by forming tetrameric forms in the membranes of many different cells, and creating large pores, makes them very permeable. The toxin inhibits the protein kinase C and the selective cationic sodium and calcium channels of the voltage-gate in the nervous and cardiovascular systems at low lytic concentrations. From four main proteins "Cerebratulus toxins- B-II to B-IV", the toxin B-II performed to be the most toxic compound.The assessment of the Lineus extract showed that they are actually more toxic than Cerebratulus extracts. The neurotoxins α- and β-nemertides, respectively, belong to the family of three and six kilodaltons. The nemertide α-1 is highly potent toxin against the VGSC. Dose-dependent injections have caused permanent paralysis to death. Many toxin genes have been predicted or discovered in the genomes and transcriptoms of nemerteans. The most prominent of the toxin genes were the Plancitoxin-1 sequence, Stichodactyla toxin peptide (Shk toxin), Se-Cephalotoxin, β pore-forming toxin aerolysin, and several neurotoxin-related sequences, such as delta-actitoxin-Amc1a, Perivitellin-2, Mu-theraphotoxin Hhn2a 4 and turripeptide Gsg9.2, different α-, β-nemertides (B-neurotoxins analogs), and Parborlysin. Most likely, the Parborlysins belong to the same family of cytotoxins AI-AIV. Study on these marine organism toxins can provide useful probes for examining receptors, ion channels, and even innate immunity mechanisms against infectious viruses, parasites, and other microbes.

As an important plant belonging to the Nepeta genus, Nepeta racemosa has been reported to be widely used in traditional medicine. The present study was conducted to investigate the phytochemical content and antioxidant and antidiabetic potential of the decoction, infusion and hydro-alcoholic extract of this plant. The total phenolic content of the samples was determined using a slightly- modified Folin–Ciocalteu method. The DPPH free radical scavenging method was used to evaluate the antioxidant activities, and the Vanillin-Sulphuric Acid Method for the saponin content of the extract. Moreover, their inhibitory effects on α-amylase and α-glucosidase were investigated based on standard methods. The phenolic content of the plant decoction was found to be 222.8 mg of gallic acid equivalent per gram of dried extract and its flavonoid content 87.8 mg of quercetin equivalent per gram of dried extract. The highest saponin content obtained was associated with the hydro-alcoholic extract of the plant with 41.9 mg of quillaja equivalent per gram of dried extract. The plant decoction also showed the highest potential compared to the other samples in terms of antioxidant properties investigated using the DPPH and FRAP methods. Furthermore, the plant decoction showed great potential in terms of its inhibitory effects on α-amylase with 9.45 µmol of acarbose equivalent per gram of dried extract, and α-glucosidase with 33.57 µmol of acarbose equivalent per gram of dried extract. According to the results, Nepeta racemosa was found to exhibit high levels of antioxidant and antidiabetic abilities, which are directly proportional to its phenolic and flavonoid contents.

The venomous jellyfish Cassiopea andromeda can produce envenomation and different toxicological and biological effects by their nematocysts. The phospholipase A2 enzymes (PLA2) are toxic and induce various pharmacological effects including neurotoxicity, myotoxicity and anticoagulant activities. The main aim of the current project was to screen the in vitro PLA2 activity of the C. andromeda crude venom. To better understand the experimental result; a molecular docking study was also performed.
The live specimens were collected from Nayband lagoon, by a trawl net, and separation of their tentacles was done according to Bloom 's et al., method. The PLA2 activity of crude venom was performed according to the acidimetric method of Tan and Tan. The lyophilized venom was subjected to Gas Chromatography/ Mass Spectroscopy, and the obtained structures were used for docking study against PLA2. The indoxam was considered as standard control.
The PLA2 activity of the jellyfish crude venom was 413 ±0.08 µmol/min/mg. Analysis of the crude venom detected seven compounds (i-vii) using GC-MS. Docking data was also confirmed the experimental results. According to the docking results, the highest affinity (-6.7 (kcal/mol)) was observed in the compound “Pregn-5-ene-3,11-dione, 17,20:20,21 bis [methylenebis(oxy)]-, cyclic 3-(1,2-ethane diyl acetal”.
A high PLA2 level was found in the venom of C. andromeda. There was a good correlation between in vitro and in silico studies.

Sea lettuce is a kind green alga with scientific name "Ulva lactuca", has many uses in many countries. With Notice to the presence of this alga in the coasts of Bushehr and its ease of propagation and cultivation, we can take advantage of beneficial interest. The objectives of this current study was to determine the amount of total fat, survey the quality and quantity of some physicochemical parameters and the profile of fatty acids in its oil.
After samples collecting of sea lettuce (Sea lettuce) from Bushehr coasts, sample preparation and extraction of fat, quantity of some physicochemical parameters according to AOAC method; and fatty acid profile were analyzed by gas chromatography with flame ionization detection (GC-FID).
The acidity index in extracted oil in Shoraye-shahr, Bandargah and Naftkesh regions were, 0.73, 0.73 and 0.72 respectively, and the peroxide value was 0.75, 0.74 and 0.75 respectively. The refractive index and average oil contents for all areas were reported 3 % and 1412, respectively. In the three mentioned regions, sixteen fatty acids including (C6), (C10), (C12), (C13), (C14), (C15), (C16), (C17), (C18), (C19), (C20), (C21), (C18: 1), (C18: 2), (C18: 3) were identified with different amounts. Palmitic acid had the highest levels in all three regions.
Sea lettuce contains different fatty acids that each of them has different applications in food industry, medicine and cosmetics. The favorable amounts of omega-3 and omega-6 fatty acids in the sea lettuce oil increase their nutritional importance. Caltivating of this beneficial alga is suggested due to the appropriate geographic climate of Bushehr.

Scombroid syndrome is one of the most important food poisoning with symptoms similar to seafood allergy, that caused by biogenic amines. Histamine is produced by decarboxylation of the amino acid histidine in fish, by histidine decarboxylase enzyme. The histamine levels in fish and its products is one of the most important biomarkers to assess the freshness or corruption of the fish. One of objectives of this study was determination of histamine levels in Barred mackerel (Scomberomorus commerrson), by HPLC method, in different conditions of keeping.
Material and There were evaluated the histamine contents, in 21 Barred mackerel samples trapped in the Bushehr coasts (Iran), after TCA extraction method, at different periods of the first, tenth (keeping at 4°C) and 30th days (keeping at -20 °C) by HPLC with FLD detector in wavelengths λx: 320 and λe: 450 nm.
The Mean ± SD of histamine in samples in revealed days were respectively the values of 12.96±0.29, 17.02±0.53 and 17.7±0.56 ppm. The highest levels of histamine in all samples in first, tenth and thirty days were respectively, ND, 2.77 and 7.77 ppm; and maximum levels were respectively 40.86, 40.75 and 40.07 ppm.
Although the detection of histamine in 90% of samples, there was no sample above maximum Tolerable level (MTL) assigned by Institute of Standard and Industrial Research of Iran (50 ppm). However, the histamine levels in 27.87% of samples were exceeded the maximum levels set in the FDA (20ppm).