Organoklorirani pesticidi u slatkovodnim ribama zagrebačkog područja

The aim of this study was to determine the level of organochlorine pesticides in freshwater fish from the Zagreb area, Croatia. The study included 215 freshwater fish samples from three sites: the Sava River, Lake Jarun, and five fishponds from the Zagreb surroundings. Organochlorine pesticides DDT and derivates, HCH, HCB, lindane, aldrin, dieldrin, endrin, heptachlor with epoxide, and methoxychlor were determined using the GC-ECD method. The determined amounts of organochlorine pesticides were within allowed concentration limits in all analysed fish samples. Median values ranged from below the detection limit of 0.01 µg kg-1 for dieldrin and metoxychlor to 2.00 µg kg-1 for DDT in the Cyprinidae fish family from the Sava River, Zagreb sampling site (group 1). This study has confirmed pesticide persistence in the overall ecosystem in our country despite the ban of some thirty years ago, like in many other parts of the world.Cilj istraživanja bio je utvrditi količinu organokloriranih pesticida u slatkovodnim ribama zagrebačkog područja. Obrađeno je ukupno 215 uzoraka slatkovodne ribe sa sljedećih triju lokacija: rijeka Sava, jezero Jarun i pet tzv. ekoloških jezera u okolici Zagreba. Organoklorirani pesticidi DDT i derivati, HCH izomeri (α-HCH, β-HCH and δ-HCH), HCB, lindan (γ-HCH), aldrin, dieldrin, endrin, heptaklor, heptaklorepoksid i metoksiklor) određivali su se metodom plinske kromatografije uz elektronapsorpcijski način detekcije i uz postignutu granicu detekcije od 0,01 µg kg-1. Vrijednosti ispitivanih organokloriranih pesticida u svim su uzorcima riba bile mnogo niže od maksimalno dopuštenih koncentracija. Vrijednosti medijana kretale su se od najnižih 0,01 µg kg-1 za dieldrin i metoksiklor do najviših 2,00 µg kg-1 za DDT u uzorcima riba porodice Cyprinidae s lokacije Sava - Zagreb. Utvrđeni ostaci preostalih ispitivanih pesticida potvrđuju kako njihovu uporabu na našim područjima tako i njihovu postojanost i prisutnost u cjelokupnom ekosustavu unatoč činjenici da je većina zabranjena u Hrvatskoj prije gotovo 30 godina, kao i u mnogim dijelovima svijeta

Another exotic mollusc in the Laurentian Great Lakes: the New Zealand native <i>Potamopyrgus antipodarum</i> (Gray 1843) (Gastropoda, Hydrobiidae)

In 1991, the hydrobiid snail Potamopyrgus antipodarum (Gray 1843), native to New Zealand, was found 1 km offshore Wilson, New York, in Lake Ontario. This is the first known occurrence of the snail in eastern North America. Densities of P. antipodarum have increased since its discovery, and the snail is expected to spread quickly throughout the Great Lakes area. The biofouling potential of P. antipodarum is probably low; however, its most serious threat may be resource competition with native molluscs. This species was probably introduced in ballast water from transoceanic vessels, thus increasing the list of nonindigenous aquatic organisms introduced into the Great Lakes since the 1800s to 140 different organisms. The risk of other species invasions into the Great Lakes is still possible, despite the now mandatory ballast water regulations. </jats:p

Successful Bleeding Control by a Combined Conventional Surgical Approach and Video-Assisted Surgery: A Case Report

The use of central venous catheters (CVCs) nowadays is a routine practice in the treatment of severely acute-diseased children. However, the procedure still carries a risk of morbidity, and severe complications are reported. When respiratory and/or hemodynamic instability develop after the procedure, prompt patient evaluation to exclude iatrogenic damage is mandatory, regardless of the primary patient condition. If a vascular injury related to CVC placement procedure is detected, the availability of an interventional radiologist and/or any surgical facilities plays an important role in the management of this life-threatening complication. We report the case of a 12-year-old boy hospitalized in the Pediatric Intensive Care Unit of our hospital for a severe motorveicle accident, who, about 30 minutes from the percutaneous CVC placement, developed tachycardia, hipoxemia, and hypotension. A chest X-ray confirmed the right positioning of the catheter, the presence also of a large left hemothorax. Interventional radiology took place, but it failed to stop the bleeding. Urgent anterolateral thoracotomy was performed while the patient was kept in a supine position because of a cervical spine luxation. During surgery, bleeding was found coming from the thoracic dome and because of a tear next to the left subclavian artery. Access to that area was technically difficult; after blood and clots were removed, multiple attempts to obtain the hemostasis failed, and definitive control of the hemorrhage was achieved only by video-assisted thoracic surgery (VATS). The postoperative period was uneventful. In this study, the authors discuss the management of this kind of complication and the value of a combined surgical approach (conventional, with a minimal access surgery procedure such as VATS) in the treatment of thoracic vascular injuries related to the insertion of a percutaneous CVC. To the best of our experience, this is the first time in which this combination of procedures has been reported in the literature. (Ann Thorac Cardiovase Surg 2009; 15: 253-256

New Canadian Records Of Baetidae (Ephemeroptera) And Adjustments To North American Cloeon

Volume: 113Start Page: 306End Page: 30