Effect of Pyrrolidinedithiocarbamate Ligand on the Luminescence Properties of Heteroligand Samarium and Europium Complexes: Experimental and Theoretical Study.

The photophysical properties of two isostructural heteroligand lanthanide complexes of general formula Ln(pdtc)(phen) ( = pyrrolidinedithiocarbamate anion, = 1,10-phenanthroline), Ln = Sm (), Eu ()) were studied in solid state and dichloromethane (DCM) solution. The two lanthanide complexes were investigated by experimental techniques for structural (single-crystal X-ray diffraction analysis of , powder XRD, TG-DTA) and spectroscopic [electron paramagnetic resonance (EPR), infrared (IR), ultraviolet-visible (UV-vis), photoluminescence (PL)] characterization. DFT/TDDFT/ωB97xD and multireference SA-CASSCF/NEVPT2 calculations with perturbative spin-orbit coupling corrections were applied to construct the Jablonski energy diagrams and to discuss the excited state energy transfer mechanism with competing excited state processes and possible sensitized mechanism of metal-centered emission.

Water Splitting Reaction Mechanism on Transition Metal (Fe-Cu) Sulphide and Selenide Clusters-А DFT Study.

The tetracarbonyl complexes of transition metal chalcogenides MX(CO), where M = Fe, Co, Ni, Cu and X = S, Se, are examined by density functional theory (DFT). The MX core is cyclic with either planar or non-planar geometry. As a sulfide, it is present in natural enzymes and has a selective redox capacity.

Energy transfer mechanism in luminescence Eu(III) and Tb(III) complexes of coumarin-3-carboxylic acid: A theoretical study.

Excited state energy level diagrams of coumarin-3-carboxylic acid (HCCA) chromophore, Eu(CCA)Cl(HO) (1), Eu(CCA)Cl(HO) (2) Eu(CCA)(HO) (3), Tb(CCA)Cl(HO) (4) and Tb(CCA)(NO)(HO) (5) in gas phase and polar solution have been calculated by means of DFT/TDDFT/ωB97XD methods. Based on these results, the ability of CCA to sensitize Eu(III) and Tb(III) luminescence has been examined. The competitive excited state processes in the complexes - fluorescence, intersystem crossing (ISC) and phosphorescence, were analyzed depending on the environment, number of the ligands, Ln(III) ion type (Eu and Tb) and counteranion (Cl and NO).

Surgical Treatment of a Patient With Nutcracker Syndrome via Transposition of the Left Renal Vein.

Introduction: Nutcracker syndrome (NCS) is caused by compression of the left renal vein (LRV) between the aorta and the superior mesenteric artery (SMA) where it passes in the fork formed at the bifurcation of these arteries. NCS leads to LRV hypertension, resulting in left flank and abdominal pain, with or without haematuria and pelvic ureteral varices.

Report: The patient was a young female with diagnostic criteria of NCS, with severe clinical manifestations.

ENDOVASCULAR TREATMENT OF AN ANEURYSM OF THE SPLENIC ARTERY.

Aneurysms of the splenic artery account for about 60% of all aneurysms of visceral arteries. Most of them are asymptomatic until rupture and are discovered accidentally, usually after an imaging study. The treatment is surgical or endovascular depending on the type, location and size.

SURGICAL STRATEGY FOR PATIENTS UNDERGOING CAROTID ENDARTERECTOMY.

Unlabelled: Carotid endarterectomy (CEA) is a surgical intervention that aims to reduce neurological symptoms in carotid atherosclerosis and prevent brain damage and subsequent neurological deficit.

Aim: To study the major risk factors, surgical techniques, applied diagnostic methods and perioperative complications occurring in patients undergoing CEA.

Materials And Methods: 496 surgical interventions on the occasion of stenoses and/or occlusions of the carotid arteries were performed for the period 1987-2009 at the department of Vascular Surgery and Angiology of "St.

Aorto-bifemoral revascularisation after radiation, peritonitis and colostomy.

The success of all vascular interventions depends mainly on the chosen strategy and access, especially in patients with severe co-morbidities, preceding operations or infection. In these cases the combination of retroperitoneal approach and extra-anatomical bypasses makes the revascularization possible. We present a clinical case of a patient after radiotherapy, peritonitis and colostomy with persistent pain in the lower extremities and angiographic finding of bilateral occlusion in the aorto-iliac segment.

Fully atomistic molecular-mechanical model of liquid alkane oils: Computational validation.

Fully atomistic molecular dynamics simulations were performed on liquid n-pentane, n-hexane, and n-heptane to derive an atomistic model for middle-chain-length alkanes. All simulations were based on existing molecular-mechanical parameters for alkanes. The computational protocol was optimized, for example, in terms of thermo- and barostat, to reproduce properly the properties of the liquids.

Surgical strategy for patients undergoing carotid endarterectomy.

Unlabelled: Carotid endarterectomy (CEA) is a surgical intervention that aims to reduce neurological symptoms in carotid atherosclerosis and prevent brain damage and subsequent permanent neurological deficit.

Aim: To study the major risk factors, surgical techniques, applied diagnostic methods and perioperative complications occurred in patients undergoing CEA.

Materials And Methods: 496 surgical interventions on the occasion of stenosis and/or occlusions of the carotid arteries were performed for the period 1987-2009 at the department of Vascular Surgery and Angiology of "St.

Surgical treatment of symptomatic and ruptured abdominal aortic aneurysms.

Despite the increased volume of patients undergoing selective reconstruction on the occasion of abdominal aortic aneurysms (AAA) in the last decades, the number of patients with rupture of abdominal aortic aneurysms (RAAA) is not significantly decreased. RAAA is catastrophic and life-threatening condition. It remains a challenge to every practitioner.

[Therapy of extracranial carotid artery aneurysms--literature review].

Extracranial carotid artery aneurysms are unusually rare. Their aetiology and clinical picture have significant meaning for their recognition, with the majority involving the common carotid artery--ACC. Approximately one third of these lesions are confined to the ICA, with an equal distribution between the proximal, middle, and distal segments.

[Endovascular or surgical treatment of the carotid arteries].

Ischemic stroke is the third most common cause of death right after myocardial infarction and malignancies. Most cases of stroke are due to extracranial carotid atherosclerotic disease. The percutaneous transluminal angioplasty and stenting of the carotid arteries have emerged as an alternative to the standart carotid endarterectomy mainly because they are less invasive procedures.

[External carotid endarterectomy].

Unlabelled: Noneoperative treatment of the internal carotid artery (ICA) occlusion is associated with increased recurrent stroke rates. Several randomized trials have validated the use of carotid endarterectomy (CEA) to treat symptomatic internal carotid artery occlusions. The aim of this study is to analyze the data from external CEA for treatment of symptomatic ICA occlusions, to evaluate its safety and outcomes.

[Adjuvant and individual application of lumbar sympathectomy at patient with arterial disease in lower limb].

The first lumbar sympathectomy for treatment of arterial occlusive disease of the lower extremity was performed in 1924 by Julio Diez of Buenos Aires. The standart anatomy textbooks indicate, as a rule that the lumbar sympathetic trunk contains four or five ganglia. The overall anatomic denervation is important for achievement of an adequate sympathectomy of a given segment of an extremity.

[The renaissance of lumbar sympathectomy].

The question addressed was whether the use of sympathectomy was of benefit in non-revascularisable critical leg ischaemia. Altogether 387 papers were found, of which 13 represented the best evidence to answer the clinical question. The author, journal, date and country of publication, patient group studied, study type, relevant outcomes, results, and study weaknesses were tabulated.

Prevalence of primary chronic venous disease: the Bulgarian experience.

Aim: The aim of this study was to evaluate the prevalence of and risk factors for chronic venous disease (CVD) in the Bulgarian adult population seeking medical help from general practitioners.

Methods: The design was a cross-sectional descriptive survey. Each general practitioner (GP) enrolled 50 consecutive patients aged 18 and over attending for a routine consultation.

[Hyperperfusion syndrome after carotid endarterectomy].

Hyperperfusion syndrome is a complication with frequency about 3 per cent and unclear etiological factors who mostly lead to hard neurological deficit and/or death for the patient. Symptoms are headaches, fits, confusion, focal neurological sings to intracerebral hemorrhage. The prevention and control are accomplished by active monitoring of intracranial blood flow and systolic blood pressure.

[Diagnostic criteria when establishing indications for revascularisation of profunda femoris artery].

In patients with chronic limb ischemia (CLI) the atherosclerotic process involves the aorto-iliac and/or the femoro-popliteal segment. In most cases there are steno-occlusive lesions of the superficial femoral artery but the profunda femoris artery is often spared. In 30% of the diabetic patients and in 9% of the nondiabetic there are lesions of the profunda femoris artery which are mainly ostial or can be found at the most proximal part.

[Surgical treatment for stenotic lesion of the subclavian artery].

We present a case of a 56-year-old male patient who was admitted at the clinic with complains of pain and blue-colored index finger of the left hand since a couple of days. He has an anamnesis of claudication of the left arm. After the contrast CT-angiogram, which showed a 80% stenosis of the left subclavian artery, the patient had an allergic reaction.

[Diagnostic criteria when establishing indications for revascularisation of profunda femoris artery].

In patients with chronic limb ischemia (CLI) the atherosclerotic process involves the aorto-iliac and/or the femoro-popliteal segment. In most cases there are steno-occlusive lesions of the superficial femoral artery but the profunda femoris artery is often spared. In 30% of the diabetic patients and in 9% of the nondiabetic there are lesions of the profunda femoris artery which are mainly ostial or can be found at the most proximal part.

Suggested approach for end to side anastomosis to the abdominal aorta in aorto-femoral bypass grafting for aorto-iliac occlusive disease.

For surgical treatment of aorto-iliac occlusive diseases the prosthetic grafts are used for aorto-femoral bypass in which the end to side anastomoses are done on anterior aspect of aorta. But this approach is leading to some disadvantages caused by gravity or pressure imposed by abdominal viscera and resulting to kinking to the anastomotic area between the vertebral column and viscera which brings about turbulence, platelet aggregation, thrombus formation, and its organization which finally occludes the lumen. Nazem's method of lateral end-to-side anastomosis preferably to the left side of aorta will be without the mentioned bad on sequences, thereby greatly reducing mortality and morbidity.

[Not Available].

The merits of the Russian physician Ugryumov, participant in the Liberation Russian-Turkish war (1877-78) and pioneer in the organization of health services in Eastern Rumelia are emphasized. Ugryumov made part of the IV brigade of the Bulgarian volunteer corps as a physician; he organized a hospital for typhus patients in Plovdiv, which subsequently was converted into the First State Hospital. Dr.