Heavy Metal Biomonitoring in Cultured Rainbow Trout of the Black Sea and Risk Estimations on Its Consumption.

In recent years, the growing importance of fish species obtained through aquaculture, coupled with a decline in wild-caught fish, has raised concerns about the potential accumulation of pollutants in these fish. This work aimed to analyze the amounts of elements in trout cultured mainly between Sinop and Samsun shores at the south of the Black Sea and marketed in Sinop fish markets. The comparison of these values with national and internationally accepted regulations was conducted, and evaluation of health risks for consumers was performed.

A review on sea cucumber (Bengali: Somuddro Sosha) as a bioindicator of heavy metal contamination and toxicity.

This review paper exhibits the underexplored realm of heavy metal contamination and associated risks in sea cucumbers (SCs), which hold significant importance in traditional Asian marine diets and are globally harvested for the Asian market. The assessment focuses on heavy metals (HMs) presence in various SC species, revealing a global trend in HMs concentrations across anatomical parts: Fe > Zn > As > Cu > Hg > Pb > Mn > Cr > Ni > Cd. Specific species, such as Eupentacta fraudatrix, Holothuria mammata, Holothuria polii, Holothuria tubulosa, and Holothuria atra, exhibit heightened arsenic levels, while Stichopus herrmanni raises concerns with mercury levels, notably reaching 3.

Spatial geochemical structure of soft sediment on shallow littoral of the Gulf of Antalya, the eastern Mediterranean Sea.

The concentrations of heavy metals in soft sediments of the Manavgat and Lara regions in Antalya, Türkiye were investigated to assess contamination levels and their potential sources, followed by multivariate statistical analysis and generation of spatial distribution maps. Results showed low contamination levels for As, Zn, and Cu, moderate contamination for Pb, Ni, and Mn, and very high accumulation for Co and Cr. Geoaccumulation index (Igeo) and contamination factor (CF) analyses revealed moderate enrichment for Mn and low enrichment for As, indicating no human-induced contamination in Cu, Pb, Zn, Mn, and As, while Ni, Co, and Cr originated mainly from agriculture.

Beach litter contamination of the Turkish middle Black Sea coasts: Spatial and temporal variation, composition, and possible sources.

Marine litter is one of the biggest environmental problems nowadays. Sinop, is located in the heart of Türkiye's Black Sea coast, has a small population, and is a popular fishing and tourist destination. In this study, marine litter amount, composition, and possible sources were investigated, and seasonal comparisons were made between in Sinop beaches.

Trace elements in edible tissues of the veined rapa whelk (Rapana venosa) in the southern Black Sea, Türkiye: sex, monthly, and age variations and human consumer health risk.

Coastal areas face significant pressures from a variety of human activities, owing primarily to population growth in these areas. Human activities produce a variety of contaminants, including trace metals, which are common forms of contamination that enter marine ecosystems. This study was carried out to provide information on trace element concentrations (Hg, Pb, Cd, Cu, and Zn) in the muscles of Rapana venosa (Valenciennes, 1846) available on Sinop coasts of the southern Black Sea and to evaluate the possible risk associated with their consumption.

Metals in Wild and Cultured Dicentrarchus labrax (Linnaeus, 1758) from Fish Markets in Sinop: Consumer's Health Risk Assessment.

Concentrations of Cd, Hg, Pb, As, Al, Cu, Fe, and Zn were determined in the muscles of wild and farmed European seabass in Sinop markets between September and December in 2020, using inductively coupled plasma mass spectrometry after microwave digestion. In the study, iron (Fe), zinc (Zn), aluminum (Al), and copper (Cu) were found higher than the other metals both in wild and cultured Dicentrarchus labrax. These are essential elements, but excess amounts act as a poison.

Toxic Metals in Seven Commercial Fish from the Southern Black Sea: Toxic Risk Assessment of Eleven-Year Data Between 2009 and 2019.

Concentrations of toxic metals (Cd, Hg and Pb) in the edible tissues of seven commercial fish species (Mullus barbatus, Merlangius merlangus, Scophthalmus maximus, Mugil cephalus, Engraulis encrasicolus, Trachurus mediterraneus and Sarda sarda) collected from Sinop coasts of the southern Black Sea were detected in 11 years. In several fish samples, the concentrations of elements (Cd, Hg and Pb) were not detected or were below the detection level. The present study showed that Pb was the most and Cd was the least accumulated metal in the studied fish species.

Estimation of Radionuclide Concentrations and Average Annual Committed Effective Dose due to Ingestion for the Population in the Red River Delta, Vietnam.

Radioactivity concentrations of nuclides of the Th and U radioactive chains and K, Sr, Cs, and Pu were surveyed for raw and cooked food of the population in the Red River delta region, Vietnam, using α-, γ-spectrometry, and liquid scintillation counting techniques. The concentration of K in the cooked food was the highest compared to those of other radionuclides ranging from (23 ± 5) (rice) to (347 ± 50) Bq kg dw (tofu). The Po concentration in the cooked food ranged from its limit of detection (LOD) of 5 mBq kg dw (rice) to (4.

Contemporary genetic structure and postglacial demographic history of the black scorpionfish, Scorpaena porcus, in the Mediterranean and the Black Seas.

Understanding the distribution of genetic diversity in the light of past demographic events linked with climatic shifts will help to forecast evolutionary trajectories of ecosystems within the current context of climate change. In this study, mitochondrial sequences and microsatellite loci were analysed using traditional population genetic approaches together with Bayesian dating and the more recent approximate Bayesian computation scenario testing. The genetic structure and demographic history of a commercial fish, the black scorpionfish, Scorpaena porcus, was investigated throughout the Mediterranean and Black Seas.

Colonoscopic resection of large colonic polyps--a prospective study.

Forty-five patients who were referred for surgical resection of large colonic polyps after index colonoscopy were considered for endoscopic polypectomy. Eighteen of these patients were ultimately referred for surgery. Twenty-five patients with 25 large polyps underwent endoscopic polypectomy; there were 9 females and 16 males with a mean age of 69 years.

Nutritional and lifestyle habits and water-fiber interaction in colorectal adenoma etiology.

Adenomatous polyps are neoplasms that may progress to colorectal cancer. The role of diet and other lifestyle habits in their etiology is now being elucidated. The aim of this study was to evaluate effects of nutritional habits, weight and weight gain, tobacco smoking, and physical activity in adenoma etiology.

Complications of rubber band ligation of symptomatic internal hemorrhoids.

In a prospective study, 512 patients undergoing hemorrhoidal band ligation over a seven-year period were followed up to focus on complications. Thirteen patients (2.5 percent) were hospitalized: six with delayed massive rectal bleeding, three with urinary retention, pain, and fever (one developed perianal abscess), and three others with severe pain due to prolapsed thrombotic hemorrhoids (one developed difficulty in urination).

Are tiny polyps important when found on sigmoidoscopy in asymptomatic people?

To determine the occurrence of synchronous large bowel polyps located proximal to the sigmoid, in persons undergoing screening flexible sigmoidoscopy, we examined those who had diminutive polyps (less than or equal to 0.5 cm) as the only finding in the distal colon by further colonoscopy. One hundred one asymptomatic persons (mean age 61 +/- 13 years) had 143 diminutive polyps; a single polyp was found in 76%, and 64% of all polyps were located in the rectum.

Colonoscopy in patients aged 80 years or older and its contribution to the evaluation of rectal bleeding.

Colonoscopies performed in patients aged 80 years or older at the Sheba Medical Center were analysed according to the primary indication for the procedure: 101 colonoscopies were performed because of rectal bleeding of at least 2 months duration, and 335 for all other indications. Carcinoma of the large bowel was found in 29 (28.7%) bleeders, with the rectum being the most frequently involved site (12 patients).

Screening for colorectal neoplasia: a multicenter study in Israel.

We report the design and results of the first Israeli multicenter screening program for colorectal neoplasia. The screening protocol comprised a risk questionnaire, fecal occult blood testing, flexible sigmoidoscopy and colonoscopy. A total of 5,601 individuals were screened in five medical centers, 55% being asymptomatic with low or average risk.

Clustering of colorectal neoplasia: characteristics of coexisting adenomas in patients with severely dysplastic polyps or invasive (malignant) polyps as compared to patients with benign adenomas or carcinomas.

This study compared the size, histology and morphology of coexisting neoplastic polyps found in colonoscopy, and evaluated the clustering of these polyps in patients with either colorectal carcinoma, cancerous polyps or benign adenomas. Patients were divided by their most malignant form of neoplasia: Group A included 58 patients with early invasive cancerous polyps, and Group B included 73 patients with in situ carcinoma within an adenoma. Group C consisted of 335 patients with benign adenomas, and Group D had 289 patients with colorectal carcinoma.

Colonoscopy without prior preparation in mild to moderate active ulcerative colitis.

We evaluated the effect of different types of preparations on the diagnostic yield of colonoscopy (total or limited) in mild to moderate active ulcerative colitis. Our ability to determine the extent of disease and see the mucosa beyond the inflamed areas was assessed in patients receiving no preparation (group A, 72 examinations) and those receiving diphosphosoda enemas (group B, 181 examinations). There were three failures in group A and 11 in group B.

Ergotamine-induced solitary rectal ulcer.

A rare case of ergotamine-induced solitary rectal ulcer is described in a 41 year old woman who used high doses of ergotamine tartrate-containing suppositories for severe migraine headaches. Complete recovery of the ulcer was noticed after cessation of treatment with the suppositories. The relevant literature is discussed.

A comparison between emergency and delayed endoscopic injection sclerotherapy of bleeding esophageal varices in nonalcoholic portal hypertension.

To study whether or not emergency sclerotherapy was more effective than a program of stabilization and elective sclerosis, we studied 84 patients with bleeding esophageal varices. They underwent 332 sessions of endoscopic injection sclerotherapy, 134 of which were performed for acute variceal bleeding. Most patients (90.

Endoscopic sphincterotomy in patients with gallbladder in situ: the influence of periampullary duodenal diverticula.

Forty-four elderly patients (mean age, 77.2 years; range, 65 to 95) with acute bile duct obstruction, with gallbladder in situ, underwent endoscopic sphincterotomy without subsequent cholecystectomy during the same hospitalization. Thirty patients had periampullary duodenal diverticula, and 14 had no diverticula.

Invasive colorectal adenomas: surgery versus colonoscopic polypectomy.

Of 6,426 colonoscopies performed in 1978-1987, 66 invasive colorectal adenomatous polyps were removed in 58 examinations. The study group included 36 (62%) men and 22 (38%) women with an age range of 42-96 years. Forty-three patients had invasive pedunculated polyps and 15 had invasive sessile polyps.

Choledocholithiasis: a comparison between the clinical presentations of multiple and solitary stones in the common bile duct.

The clinical presentations of 20 patients with four or more choledochal stones were compared with those of 68 patients who had one to three choledochal stones, investigated during the same time period. All patients underwent endoscopic retrograde cholangiopancreatography (ERCP) and endoscopic sphincterotomy. Patients with multiple choledochal stones usually presented with insidious onset of painless jaundice, simulating malignant bile duct obstruction, in contrast to the abrupt onset of cholangitis or pain experienced by patients with one to three stones.