Modified Criterion for Economic Efficiency Estimation of Heat Pumps

In this work the cost-effectiveness of coal mine waste water low potential heat utilization and integration in the enterprise local heating network by the bivalent parallel scheme is investigated. It is shown that the additive criterion of economic efficiency is not always sensitive to the target value because of the reason of non-linear coupling between the arguments of the target function. Several cases were considered from the viewpoint of cost-effectiveness criterion. Moreover, the arguments of the target function are also nonlinear, depending on technological parameters of the heat pump (HP) equipment. As a more effective criteria were proposed the modified canonical additive-multiplicative function and Kolmogorov-Gabor polynomial function to obtain the generalized multivariate estimation of alternatives in two stages procedure

Heat integration of ammonia refrigeration cycle into buildings heating systems in buildings

The possibility of utilizing the low potential heat of the ammonia refrigeration cycle has been shown. The design of an energy saving heat exchangers network to heat water and air in municipal buildings has been proposed. The possibility of increasing the pressure of ammonia with the purpose of improving the heat recovery in the system and reducing the load of the heating and cooling systems was considered. The minimum temperature difference in the heat exchangers network was selected. The economic efficiency of the retrofit project was estimated

Ammonia Refrigeration Cycle Integration in Buildings Heating System

This work investigates the possibility of ammonia low potential heat utilisation with use of Process Integration methodology. The two operation modes are considered. The first one is the use of ammonia gas super-heating and partly ammonia condensation. The low condensation temperature of ammonia is limiting the low potential heat usage. The second option is introduction of ammonia additional compression to increase the temperature of ammonia condensation. The low potential heat consumers are the hot water supply system, air pre-heating system and air heating for the fans

ИМПЛАНТАЦИОННЫЙ МЕТАСТАЗ РАКА ГОРТАНИ ПОСЛЕ НАЛОЖЕНИЯ ЧРЕСКОЖНОЙ ЭНДОСКОПИЧЕСКОЙ ГАСТРОСТОМЫ

Squamous cell head and neck carcinoma is frequently associated with dysphagia. An adequate enteral nutrition is the key to successful treatment and rehabilitation of these patients. Percutaneous endoscopic gastrostomy is the preferred route of feeding and nutritional support in head and neck cancer patients with dysphagia. We report a rare case of implantation metastasis of laryngeal cancer following percutaneous endoscopic gastrostomy. Our experience in treating this complication has been described. Percutaneous endoscopic gastrostomy is a less-invasive procedure than open gastrostomy. Percutaneous endoscopic gastrostomy can be accompanied by severe complications such as implantation metastasis at gastrostomy site. Careful monitoring can provide early detection of this complication and early treatment. Развитие дисфагии у пациентов с плоскоклеточным раком головы и шеи является закономерным развитием опухолевого процесса. Адекватное энтеральное питание залог успешного лечения и реабилитации пациентов. Одним из возможных методов коррекции дисфагии является наложение чрезкожной эндоскопической гастростомы. Представлен наш опыт наблюдения и лечения пациентки с имплантационным метастазом рака гортани, после наложения чрезкожной эндоскопической гастростомы. Данный случай иллюстрирует редкое осложнение при наложении чрезкожной эндоскопической гастростомии, имплантационное метастазирование и опыт лечения данной пациентки. ЧЭГ является менее инвазивной процедурой, чем открытая гастростомия, она имеет ряд осложнений, такие как имплантационное метастазирование в области гастростомы. Знание этого осложнения и тщательный контроль со стороны онкологов, может обеспечить раннее выявление этого осложнения и раннее лечение.

Oral squamous cell carcinoma in "young" patients

Aim of the study — to provide for medical oncologists and surgeon, who specialize in treatment of head and neck oncology patients, the most recent information about incidence and feature of oral squamous cell carcinoma (OSCC) in young patientsЦель исследования — предоставить онкологам и хирургам, специализирующимся на лечении пациентов, страдающих раком головы и шеи, наиболее полную информацию о распространенности и особенностях плоскоклеточного рака полости рта у «молодых» пациентов на основе последних литературных данны

Neurotensin(8–13) analogs as dual NTS1 and NTS2 receptor ligands with enhanced effects on a mouse model of Parkinson's disease

: The modulatory interactions between neurotensin (NT) and the dopaminergic neurotransmitter system in the brain suggest that NT may be associated with the progression of Parkinson's disease (PD). NT exerts its neurophysiological effects by interactions with the human NT receptors type 1 (hNTS1) and 2 (hNTS2). Therefore, both receptor subtypes are promising targets for the development of novel NT-based analogs for the treatment of PD. In this study, we used a virtually guided molecular modeling approach to predict the activity of NT(8-13) analogs by investigating the docking models of ligands designed for binding to the human NTS1 and NTS2 receptors. The importance of the residues at positions 8 and/or 9 for hNTS1 and hNTS2 receptor binding affinity was experimentally confirmed by radioligand binding assays. Further in vitro ADME profiling and in vivo studies revealed that, compared to the parent peptide NT(8-13), compound 10 exhibited improved stability and BBB permeability combined with a significant enhancement of the motor function and memory in a mouse model of PD. The herein reported NTS1/NTS2 dual-specific NT(8-13) analogs represent an attractive tool for the development of therapeutic strategies against PD and potentially other CNS disorders

Клинический случай метастаза рака носоглотки в щитовидную железу

Background. Nasopharyngeal cancer is a rare head and neck cancer with a relatively high risk of locoregional recurrence and distant metastases. The most common sites of metastases are bones (70–80 %) followed by liver (30 %), lung (18 %), and lymph node (axillary, mediastinal, pelvic, and inguinal). Thyroid gland is an uncommon site of metastasis with an incidence ranging from 0.5% to 24 %. Thyroid metastasis from nasopharyngeal cancer has been reported in only 9 cases in the world literature and no one in Russia. Case report. We report a case of thyroid metastasis from nasopharyngeal cancer found incidentally in a 53-year-old female patient. Conclusion. Metastases to the thyroid gland are rare, and patients with metastatic thyroid disease rarely present with organ-specifc symptoms, thus raising diagnostic diffculties for both clinicians and the pathologists. This clinical report demonstrates the diffculties of differential diagnosis,as well as the importance of a thorough collection of complaints, anamnesis, and clinical examination.Актуальность. Рак носоглотки относится к редким заболеваниям в структуре опухолей головы и шеи. Данное новообразование имеет относительно высокий риск метастазов в регионарные лимфоузлы и отдаленные органы-мишени. Наиболее часто отдаленное метастазирование происходит в кости (70–80 %), печень (30 %), легкие (18 %), а также лимфоузлы (подмышечные, средостения, малого таза, паховые). Метастазы в щитовидную железу являются редким событием и встречаются в 0,5–24 % случаев. В мировой литературе описано 9 случаев метастазов рака носоглотки в щитовидную железу, подобных сообщений в отечественной литературе не найдено. Описание клинического случая. Представлено клиническое наблюдение 53-летней пациентки, у которой первично выявлен метастаз рака носоглотки в щитовидную железу как случайная находка. Заключение. Щитовидная железа редко является органом-мишенью для метастазов, при этом ее метастатическое поражение обычно не сопровождается функциональными нарушениями. По этой причине его диагностика является затруднительной как для клинициста, так и для патолога. Данный клинический случай демонстрирует трудности дифференциальной диагностики, а также показывает важность тщательного сбора жалоб, анамнеза, клинического осмотра.

IMPLANTATION METASTASIS OF LARYNGEAL CANCER AFTER PERCUTANEOUS ENDOSCOPIC GASTROSTOMY

Squamous cell head and neck carcinoma is frequently associated with dysphagia. An adequate enteral nutrition is the key to successful treatment and rehabilitation of these patients. Percutaneous endoscopic gastrostomy is the preferred route of feeding and nutritional support in head and neck cancer patients with dysphagia. We report a rare case of implantation metastasis of laryngeal cancer following percutaneous endoscopic gastrostomy. Our experience in treating this complication has been described. Percutaneous endoscopic gastrostomy is a less-invasive procedure than open gastrostomy. Percutaneous endoscopic gastrostomy can be accompanied by severe complications such as implantation metastasis at gastrostomy site. Careful monitoring can provide early detection of this complication and early treatment

PERISTOMAL RECURRENCE OF LARYNGEAL CANCER (LITERATURE REVIEW)

Treatment of recurrent laryngeal cancer remains challenging for clinicians. Peristomal reccurence is one of the severest complications of laryngeal cancer that occurs in 2–15  % of patients after laryngectomy and has a poor prognosis: the two-year survival rate is 45 % in patients with stage I and stage II recurrence (according to G.A. Sisson) and 9 % among patients with stage III and stage IV recurrence. Stomal recurrence usually occurs within 2 years after surgery. The following factors can influence that: location of the tumor in the subglottic region of the larynx, size of the primary tumor, presence of regional metastases, placement of a tracheostoma before laryngectomy, and submucosal spread of the tumor to the trachea. All these factors should be taken into account in patients» management, including prescription of adjuvant therapy and choosing a treatment strategy in patients with primary disease.Since there are multiple factors that can influence peristomal reccurence development, the disease requires comprehensive evaluation in order to provide the most adequate treatment and to prevent stomal recurrence

Die Ermittlung der Spannungen und Verformungen in Teilen eines Diesellokomotivradsatzes bei Wärmebeanspruchungen

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