Laparoscopic Roux-en-Y reconstruction in a patient with afferent loop syndrome and peptic ulcers of gastroenteroanastomosis - A first experience

This paper is devoted to the description of a currently rare clinical observation of the surgical treatment of a patient with postgastroresection syndrome (afferent loop syndrome and peptic ulcers of gastroenteroanastomosis) - resection of the stomach stump with laparoscopic Roux-en-Y reconstructio

Gas-Phase Synthesis of Triphenylene (C18 H12 ).

For the last decades, the hydrogen-abstraction-acetylene-addition (HACA) mechanism has been widely invoked to rationalize the high-temperature synthesis of PAHs as detected in carbonaceous meteorites (CM) and proposed to exist in the interstellar medium (ISM). By unravelling the chemistry of the 9-phenanthrenyl radical ([C14 H9 ]. ) with vinylacetylene (C4 H4 ), we present the first compelling evidence of a barrier-less pathway leading to a prototype tetracyclic PAH - triphenylene (C18 H12 ) - via an unconventional hydrogen abstraction-vinylacetylene addition (HAVA) mechanism operational at temperatures as low as 10 K. The barrier-less, exoergic nature of the reaction reveals HAVA as a versatile reaction mechanism that may drive molecular mass growth processes to PAHs and even two-dimensional, graphene-type nanostructures in cold environments in deep space thus leading to a better understanding of the carbon chemistry in our universe through the untangling of elementary reactions on the most fundamental level

Open Circuit Potential Shifts of Activated Carbon in Aqueous Solutions During Chemical and Adsorption Interactions

Interaction of certain inorganic and organic compounds with activated carbon and the effect of such interaction on open circuit potential of activated carbon were studied. Open circuit potential shifts were observed for an overwhelming majority of the substances and brands of activated carbons investigated. Both negative and positive potential shifts were observed. It was shown that open circuit potential shifts for organic substances depend on degree of coverage of the activated carbon surface. Whereas adsorption of investigated organic compound on activated carbon led to positive potential shifts, desorption of adsorbates from the activated carbon surface led to potential shifts in the opposite direction. Furthermore, time dependencies of open circuit potential shifts were similar for different carbon brands. The magnitude of the shifts depended on the adsorbate, adsorption activity of the adsorbent, and the steric configuration of potential-determinative pores and adsorbate molecules

A Window on the CP-violating Phases of MSSM from Lepton Flavor Violating Processes

It has recently been shown that by measuring the transverse polarization of the final particles in the LFV processes $\mu \to e\gamma$, $\mu \to eee$ and $\mu N\to e N$, one can derive information on the CP-violating phases of the underlying theory. We derive formulas for the transverse polarization of the final particles in terms of the couplings of the effective potential leading to these processes. We then study the dependence of the polarizations of $e$ and $\gamma$ in the $\mu \to e \gamma$ and $\mu N \to e N$ on the parameters of the Minimal Supersymmetric Standard Model (MSSM). We show that combining the information on various observables in the $\mu \to e\gamma$ and $\mu N\to e N$ search experiments with the information on the electric dipole moment of the electron can help us to solve the degeneracies in parameter space and to determine the values of certain phases.Comment: 16 pages, 8 figure

ОЦЕНКА ПОЧЕЧНЫХ ФУНКЦИЙ И ОПЕРАТИВНОЕ ЛЕЧЕНИЕ ПОЧЕЧНО-КЛЕТОЧНОГО РАКА

 The main goal in the treatment of kidney tumors is to preserve renal function. Investigations made in the past decades show that chronic kidney diseases (CKD) are much more common than formerly estimated and conventional methods for evaluating renal function frequently reduce the incidence of CKD having more serious consequences than recognized before. CKD leads to renal dysfunction subsequently resulting in renal failure that increases a risk for the development and progression of cardiovascular diseases. Formulas for calculation of glomerular filtration rate on the basis of serum creatinine are presently in common use to evaluate renal function. The MDRD and Cockcroft-Gault formulas are most frequently used. Investigations dealing with the radiological estimation of renal volumes and function are also promising. In patients with renal cell carcinoma (RCC), the differences in cancer-specific and overall survival become significant just 3 years after surgery. Decreased renal function after surgical renal tissue removal in the presence of CKD is one of the significant reasons for no positive changes in the overall survival of patients with RCC. According to the data of different studies, the concurrence of RCC and CKD, which cause diminished renal function, is encountered in a considerable number of patients. Thus, the present-day treatment of patients with RCC should be focused on the optimization of renal function, the prevention of CKD, and the minimization of its degree. Researches to improve renal function in RCC patients who have undergone surgery are regarded as the priorities of urologic oncology.Сохранение почечной функции является основной задачей в лечении опухолевых заболеваний почек. Исследования последних десятилетий показывают, что хронические заболевания почек (ХЗП) распространены намного больше, чем это оценивалось ранее, а традиционные методы оценки функции почек часто занижают частоту ХЗП, имеющих более серьезные последствия, чем это признавалось в прошлом. ХЗП приводят к нарушению почечных функций с последующим исходом в почечную недостаточность, которая увеличивает риск развития и прогрессирования сердечно-сосудистых заболеваний. В настоящее время при оценке почечной функции широко используются формулы расчета скорости клубочковой фильтрации на основе сывороточного креатинина. Чаще всего применяют формулы MDRD и Кокрофта–Голта. Перспективны также исследования по лучевой оценке объема и функции почек. У больных почечно-клеточным раком (ПКР) различия в онкоспецифической и общей выживаемости становятся значимыми уже через 3 года после оперативного лечения. Одна из существенных причин отсутствия позитивных изменений в общей выживаемости больных ПКР – снижение почечной функции после хирургического удаления почечной ткани на фоне ХЗП.По данным разных исследований, сочетание ПКР и ХЗП, приводящих к снижению почечной функции, встречается у значительного числа пациентов. Таким образом, современное лечение больных ПКР должно быть сфокусировано на оптимизации функции почек, предотвращении ХЗП и минимизации степени тяжести ХЗП. Научные исследования с целью улучшения почечной функции у больных ПКР, перенесших оперативное лечение, относятся к приоритетным задачам онкоурологии

INVESTIGATION OF SORPTION CHARACTERISTICS OF POLYMERIC MINERAL-FILLED COMPOSITES FOR MEDICINE

The polymer compositions on the base of acrylic derivatives and bentonite particles modified by silver ions with various share and dispersion are received and studied by radical polymerization in the water. Partially neutralized acrylic acid, acrylamide and methylene-bis-acrilamide and particles of bentonite with fraction 0 - 0,05 mass.% are chosen as initial substances. The influence of bentonite concentration on absorbing characteristics of polymer materials in the distilled water is shown. It is demonstrated that the increase of bentonite fraction up to 5 mass.% leads to the rise of degree of equilibrium swelling by 1,5 – 2 times in comparison with an unfilled polymer matrix. The acrylic nanocompositions with a mass fraction of bentonite equal to 0,01 mass.% possess the greatest kinetic characteristics. Kinetic dependences of new composite materials swelling in physiological solution from a filler dispersion part are investigated. It is shown that in high dispersion (with particle size less than 0,25 mm) a part of mineral–containing filler equal to 1 mass.% leads to significant increase in values of equilibrium swelling degree in comparison with an unfilled sample (by 1,5 times). The effect of polyelectrolyte suppression of polymer composition swelling in physiological solution is studied. It results in values reduction of equilibrium swelling degree in comparison with these values in the distilled water. Application prospects for the received compositions are shown at bandages creation for wounds treatment of various etiologies. Research results are recommended for usage in medical practice for optimization of wound process march

Parameters of the Blood Oxidant/Antioxidant System in Elderly Patients with Acute Poisoning

The aim of the study was to assess the oxidant/antioxidant status in elderly patients in the early period of acute poisoning by psychotropic drugs or corrosive substances.Material and methods. An open prospective observational study with retrospective control was conducted in 80 patients (age ≥ 60 years) with acute poisoning, of which 49 patients aged 72.1±9.55 years had psychotropic drug poisoning (PDP) and 31 subjects aged 73.0±10.3 years had corrosive substance poisoning (CSP). Patients with mild poisoning were excluded from the study. The control group consisted of 39 volunteers aged 68.3±6.3 years. Total antioxidant status (TAS), blood levels of malondialdehyde (MDA), stable nitric oxide metabolites (nitrite/nitrate, NOx), and oxidative stress index (MDA/TAS) were measured on days 1, 3 and 5 after hospital admission.Results. When analyzing the changes in the parameters of the oxidant/antioxidant system, we observed lower values of the studied parameters in patients with both PDP and CSP compared to the control group. In patients with PDP, several parameters were reduced: MDA by 1.2 times on days 1 and 3 (P=0.002; P=0.008, respectively), NOx by 1.7 times (P<0.001) at all stages of the study, MDA/TAS by 2.4–2.9 times (P<0.001). In patients with CSP, MDA level decreased by 1.1–1.2 times at all study timepoints (P=0.003; P=0.010; P=0.046, respectively), NOx dropped 1.4–1.6-fold (P=0.012; P=0.004; P=0.023, respectively), and MDA/TAS decreased by 2.3–2.4 times (P<0.001). While comparing patients with favorable and fatal outcome, we found that in survived patients an increase of MDA/TAS along with growing NOx level was seen by day 5 with no significant changes of MDA and TAS, while in non-survivors MDA/TAS dropped continuously due to progressive fall of NOx level, reaching values 2.8–2.9 times (P<0.001) lower than those of the controls.Conclusion. In elderly patients with acute poisonings due to psychotropic drugs or corrosive substances, an inadequate response of the oxidant/antioxidant system occurs manifesting as a reduced blood level of peroxidation products with simultaneous normal or slightly decreased concentration of antioxidant protection system components. Thus, the oxidative stress develops, which contributes to the death of the patients