bluuebunny/crossref_metadata_2025_split huggingface dataset:
Investigations of the emission characteristics of a gas turbine combustor with water steam injection
Authors: Burunsuz К.S. , Kuklinovsky V. V. , Serbin S. I. 
Published: June 2019

The article is devoted to investigation of the possibilities of creating highly efficient and competitive Ukrainian gas turbine engines (GTEs), which correspond to modern environmental requirements for new generation energy modules. One of the most important directions of solving this problem is considered, namely, the possibility of realizing a complex thermal circuit of a gas turbine unit (GTU) - the scheme "Aquarius" with the utilization of exhaust gases heat and the injection of ecological and energy water steam into the flowing part of a combustor. The possibilities of reducing emission of harmful components, in particular, of nitrogen oxides, are analyzed, while organizing the process of a 25 MW gas turbine combustor with the supply of water steam to the primary and secondary chamber’s zones. Three-dimensional calculations of the aerodynamic structure of chemically reacting flows in a gas turbine combustor were performed with the help of methods of computational fluid dynamics (CFD). The results of theoretical investigations of gas turbine combustor’s emission characteristics at different ratios of the ecological and energy steam consumptions are presented, their rational values are revealed. The main results of the work can be used at power engineering enterprises for upgrading and modernizing existing and designing models of low-emission combustors of GTE.
Розробка автономних систем охолодження з урахуванням відновлювальних і непридатних джерел теплової енергії
Authors: Тітлов О. С. , Осадчук Є.О. , Цой О. П. 
Published: June 2019

Виконано аналіз можливостей використання нічного радіаційного випромінювання (НРВ) для додаткового відводу тепла від елементів системи рідинного охолодження. Показано енергетичні перспективи використання технології НРВ для автономних первинних систем охолодження переважно в селянських господарствах, розташованих у віддалених місцевостях від джерел електричної енергії. Для підвищення енергетичної ефективності автономних систем охолодження запропоновано використовувати абсорбційні водоаміачні холодильні машини (АВХМ) і парокомпресійні холодильні машини (ПКХМ), які дозволять в світлий час доби створювати запаси холоду в системі холодоакумуляціі. Для роботи АВХМ пропонується використовувати теплову енергію сонячного випромінювання. Розроблено алгоритм пошуку мінімальної температури гріючого джерела АВХМ в залежності від температур об'єкта охолодження і охолоджуючого середовища. Показано, що при реалізації традиційних циклів АВХМ мають місце режими з максимальною енергетичною ефективністю, а для їх досягнення необхідна відповідна комбінація складу робочого тіла (водоаміачного розчину) і температур гріючого джерела. Показано також, що при роботі від сонячних колекторів з водою в якості теплоносія, до складу схеми АВХМ необхідно включати бустер-компресор перед конденсатором аміаку. Виконано термодинамічний аналіз циклів ПКХМ, що працюють на дозволених в даний час робочих тілах. Відзначено високі енергетичні характеристики ПКХМ при роботі в умовах низьких температур атмосферного повітря. Так, при зниженні температури атмосферного повітря від 40 ° С до 10 ° С в середньому має місце зростання холодильного коефіцієнта циклів ПКХМ в 4-6 разів, а для аміаку – в 17,3 рази. Розроблено оригінальні схеми систем первинного охолодження молока на базі ПКХМ і АВХМ з використанням технології НРО, що дозволяють працювати в автономному режимі з використанням мінімальної кількості електричної енергії.
İntranazal Salbutamolün Allerjik Rinitli Çocuk Hastalarda Görülen Burun Tıkanıklığı Üzerine Etkisi
Authors: YALIM Sıdıka Deniz , ASİLSOY Suna , YILMAZ İsmail , DURMAZ Cemile , USTA GÜÇ Belgin 
Published: June 2019

Amaç: Atopik alerjik rinitli
çocuk hastalarda intranazal salbutamol uygulanmasının etkisi olup olmadığını
araştırmak.Gereç ve Yöntemler:
Yaşları 6 ile 17 arasında atopik alerjik rinitli on altı çocuk hastaya (9
erkek, 7 kız) intranazal salbutamol uygulandı
ve ilaç uygulamasından önce ve hemen sonra akustik rinometri ile
değerlendirildi.Bulgular: İntranazal salbutamol
uygulamasından önce ve sonra sol ve sağ nazal kaviteler arasında CSA(Çapraz
kesit alanı)1 SD(standart deviasyon) ve ayrıca sağ nazal kavitede CSA1 alanı ve
CSA3 mesafesi arasında istatistiksel olarak anlamlı fark vardı.

Sonuç: İntranazal salbutamol
uygulaması atopik alerjik rinitli çocuk hastalarda hiçbir yan etkisi olmaksızın
faydalıdır. Ayrıca intranazal salbutamol akut burun tıkanıklıklarında kurtarıcı
ilaç olarak kullanılabilir.
The Comparison of Spinal Ropivacaıne and Levobupivacaine for Transurethral Surgery
Authors: BİLAL Bora , YAĞAN Özgür , ALBAYRAK Mahinur Demet , AKAN TUNÇTÜRK Belgin , GÖĞÜŞ Nermin 
Published: June 2019

Objective. It was aimed to compare the efficacy of levobupivacaine
and ropivacaine during transurethral resection of the prostate under spinal
anesthesia.Material and Methods:
In this prospective, randomized, double-blind trial, 40 patients
undergoing elective transurethral resection of the prostate under spinal
anesthesia were randomized into two groups.
0.75% levobupivacaine 7.5mg (Group I) and 0.75% ropivacaine 7.5mg (Group
II) were used intrathecally.Results: There
were no differences the time for sensorial block to reach T10, maximum
sensorial block level, the time to reach maximum block level, motor block level
at the end of surgery between the groups.
The two-segment regression time was 53.75 ± 10.75 minutes in Group I and
73.25 ± 15.50 minutes in Group II (p&lt;0.000), the regression time to reach
T12 was 70.25±17.05 minutes in Group I and 88.00 ± 20.42 in Group II
(p&lt;0.005), the duration of the motor
block was 60.75±36.93 minutes in Group I and 92.00±26.03 minutes in Group II
(p&lt;0.004). There was not any significant difference between groups with
regard to hemodynamic data and side effects.

Conclusions: This study showed that, low-dose levobupivacaine and
ropivacaine used in transurethral surgery have similar effects and delivers
sufficient and reliable anesthesia. Use of ropivacaine constitutes an advantage
since the motor blockage level is shorter with it. As a result, it was concluded that
low-dose ropivacaine and levobupivacaine used in transurethral surgery had
similar effects, provided adequate and reliable anesthesia, but ropivacaine was
an advantage because of the short duration of motor block.
The effect of Nigella sativa (black cumin seeds) and Zingiber officinale (Ginger rhizome) Essential Oils on Multidrug-Resistant Bacteria
Authors: Aziz Shawnm , Salih Tara , Hamachawash Kwestan 
Published: June 2019

Antibiotic resistance is growing and has limited the ability of physician's treatment decisions. Discovery of new, effective and safe substances that prevent troublesome infections is greatly needed to provide alternative therapeutic options. This study evaluated the antibacterial and synergistic effect of Hydro extracts of two plants essential oils of black seed (Nigella sativa) and ginger (Zingiber officinale) rhizome each alone and in combination, against selected different strains of gram negative and gram positive multidrug-resistant bacteria (Klebsiella pneumonia, Acinetobacter baumannii, Pseudomonas aeruginosa , Escherichia coli and Methicillin Resistant Staphylococcus aureus ) isolated from burn patients. The isolated were identified basing upon their colony characteristics, gram-staining, motility and biochemical tests according to standard microbiological techniques. All the isolates were tested for their susceptibility to different antibiotics and compared to the interpretive chart zone sizes. The antibacterial effect of essential oils was conducted against all isolates by disk diffusion assay, the minimum inhibitory concentrations and the minimum bactericidal concentrations of the plant essential oils were processed by using micro-dilution technique. The results indicated that all the different strains of Klebsiella pneumoniae, Acinetobacter baumannii, Pseudomonas aeruginosa and Escherichia coli that were tested against 100% concentration of essential oils; there was no recorded zone of inhibition. However, for the different strains of Methicillin Resistant Staphylococcus aureus, different zones of inhibition where obtained for Nigella sativa oil singly and combination of Nigella sativa with Zingiber officinale at different dilutions 100%, 75%, 50%, 25%, 12.5%, 6.25% and 3.12%. Nigella sativa oil alone presents inhibition zones at concentration 100% ranged between (10mm) to (34mm), while Zingiber officinale oil extracts alone had no significant antibacterial effect. In
addition, combination of both oil extracts at 100% concentration showed inhibition zone greatest than the standards antibiotics which ranged between (12mm) to (52mm). Synergistic effect was noticed in combination of Nigella sativa, Zingiber officinale oil extracts and Antibiotics. The combination of both oil extracts of Nigella sativa oil and Zingiber officinale oil showed an excellent antibacterial and synergistic activity against Methicillin Resistant Staphylococcus aureus.
Anatomical characters used to delimit species of some genera of Brassicaceae in Iraq.
Authors: Al-Saadi Sahar , Qader Karzan , Fetah Heyder 
Published: June 2019

The anatomical characters of the leaf epidermal cells and trichomes of 13 species of Brassicaceae family were studied by light and scanning electron microscopy. The results showed cell walls thicker in Cheiranthus cheiri, Camelina rumelica, Biscutella didyma; and also, in lower epidermis of Crambe orientalis. While they were thin in Calepina irregularis, Lobularia maritima, Nasturtium officinale and Thlaspi perfoliatum. Cells of upper epidermis were with strongly undulate anticlinal cell walls in Capsella bursa-pastoris, Draba bruniifolia, Nasturtium officinale and Sameraria stylophora. Cells were with sinuous anticlinal walls in Calepina irregularis, Cheiranthus cheiri and Biscutella didyma. There were straight-sinuate anticlinal cell walls in the rest of the species studied. Five types of stomatal complex were found: 1. Anisocytic (Cruciferous), 2. Anomocytic (Rununculaceous), 3. Hemiparacytic, 4. Paracytic, in Cheiranthus cheiri, Crambe orientalis, Nasturtium officinale, Cardaria drapa subsp. draba and Thlaspi perfoliatum, and 5. Tetracytic in Cardaria draba and Thlaspi perfoliatum. The highest Stomatal index percent was 36.4% on the abaxial surface of Cheiranthus cheiri, and the lowest 7.81% in abaxial of Draba bruniifolia. Eight trichome types are distinguished: Simple, T-shaped, Y-shaped, V-shaped, Vesiculate, Clavate, Dendroid, Stellate and Long membranous. In addition, glabrous species also were found.
Ability of different adsorbent for removal of Rhodamine B from aqueous solution
Authors: Ahmed Nawzad , Al-Salihi Kareem 
Published: June 2019

Adsorption of Rhodamine B dye on powdered TiO2, zinc oxide (ZnO) and natural Bentonoit clay from aqueous solutions have been studied .The potential for the adsorption of Rhoamine dye at a fixed initial concentration of 5 ppm. The experiments were carried out in a batch system to optimize operation variables initial concentration, effect of time adsorption isotherms.
The langmuir and frendlish isotherm equations were applied to the data and values of parameters of these results suggest that the adsorption of (RB) dye on ZnO observed more fit to Freundlich model it means the Rhodamine B adsorbed weakly to the surfaces of ZnO, physical adsorption is achieved between the adsorbed and adsorbent, but the adsorption on TiO2 and bentonite better fit to Langmuir model. Kinetics study was made using lagergreen equation the results show the sorption of Rhodamine B dye uptake on ZnO fitted to first order reaction. And the sorption of RB on TiO2, and Bentonite fitted with second order. The partition coefficient kd for the sorption of RB on TiO2, ZnO and bentonite also determined and shows the value of Kd increases with time until equilibrium and becomes constant. we can conclude that the proportion of RB dye on each adsorbent increase which means that the large number of adsorption sites available with the rate slowing with time as sites fill up. The enthalpy of adsorption of rhodamine B on TiO2, + 4.09 kJ/mol, on ZnO +15.25 kJ/mol and on bentonite +4.01 kJ/mol indicates that the process is endothermic. The thermodynamic quantities ΔG°, ΔH°, and ΔS°, for the adsorption of rhodamine B dye on the surfaces of TiO2, ZnO and bentonite have been calculated. The result shows that the value of ΔG° decrease with an increase in temperature indicates that the adsorption process is more favorable at high temperature. Whereas the positive value of ΔS° as a result of rhodamine B adsorption due to an increased degree of freedom in the system and indicates high affinity of the adsorbent for Rhodamine molecules.
Sistema de compensación de los docentes ocasionales y catedráticos de las universidades públicas de la ciudad de Palmira – Valle del Cauca – 2017
Authors: Chica-Velásquez Mónica Fernanda , León-Polo Erika Paola , Montoya-Rendón Julio César 
Published: June 2019

Esta investigación tuvo como objetivo describir el sistema de compensación de los docentes ocasionales y catedráticos de las universidades públicas de la ciudad de Palmira- Valle del Cauca– 2017. Como referente, se tuvo en cuenta la normativa interna de las universidades, la legislación y conceptos, contrastándolos con la información obtenida de fuente primaria. Es una investigación de carácter mixto, de diseño transversal. La muestra estuvo conformada por 143 docentes; 48 docentes de la Universidad del Valle, 51 de la Universidad Nacional Abierta y a Distancia y 44 de la Universidad Nacional de Colombia. La encuesta diseñada indagó aspectos del sistema de compensación y contratación. Los resultados evidencian que los sistemas de compensación de las universidades participantes, están enmarcados dentro de la normatividad vigente, se rigen por diferentes estatutos y leyes estipulados por el gobierno nacional y la normativa interna de cada universidad, los cuales se enfocan en los derechos, deberes, condiciones de trabajo con que cuentan los docentes ocasionales, sin embargo, hay aspectos que solo benefician al personal de carrera y no a los docentes ocasionales, no cuentan con promociones, convocatorias para planta docente, incentivos, lo que hace una gran diferencia con los docentes de carrera y debe ser tema de revisión por parte de los involucrados.
Análisis de la accidentalidad laboral en colaboradores de una institución de educación superior para el diseño de un programa de cuidado a la salud - Cartagena 2018
Authors: Escudero Sabogal Irina del Rosario , Muñoz Vergara Amaury 
Published: June 2019

Se pretende analizar la tasa de accidentalidad laboral en los colaboradores de una Institución de Educación Superior en Cartagena, Colombia, para el diseño de un programa de cuidado a la salud, mediante un estudio transversal y descriptivo entre los años 2015 al 2017; para la recolección de la información se utilizaron los registros de reporte de accidentes, la caracterización de la accidentalidad de la administradora de riesgos laborales SURA y la matriz de identificación de peligros y valoración del riesgo de la Institución; los resultados se analizaron con la herramienta de Microsoft Excel, y se obtuvo la tasa de accidentalidad en cada año, 2015 (2%), 2016 (3%) y 2017 (3%); la parte del cuerpo con mayor afectación fueron los miembros inferiores (40%), seguidos de las manos (30%); los riesgos locativos y mecánicos los de mayor incidencia de accidentes; además se diseñó un modelo educativo con base en actividades andragógicas y desarrollo por competencias; en conclusión, aunque la tasa de accidentalidad en la Institución es relativamente baja, se requiere de medidas de promoción y prevención para fomentar la cultura del cuidado a la salud de los colaboradores, con la finalidad de mejorar su calidad de vida
Anatomical variations of sphenoid sinus among patients undergoing computed tomography of paranasal sinus
Authors: Singh Bhanu Pratap , Metgudmath Rajendra Basayya , Singh Divya , Saxena Udit 
Published: June 2019

<p class="abstract"><strong>Background:</strong> The approach to sphenoid sinus still remains a clinical challenge, despite the arrival of endoscopy, computed tomography (CT) and functional endoscopic sinus surgery (FESS). The complex and variable anatomy of the sphenoid sinus can be difficult to appreciate with standard axial or coronal CT images of the sinus. The study was done with the objective to study the anatomy of the sphenoid sinus and its variations, and to compare the prevalence of variants obtained in our study with the reported cases in the literature.</p><p class="abstract"><strong>Methods:</strong> The CT scans of 168 normal slides obtained from 84 patients with paranasal sinus were analysed using triplanar imaging provided by 64-slice spiral CT. The prevalence of each of the sphenoid sinus variation was also analysed. </p><p class="abstract"><strong>Results:</strong> Results showed that the prevalence of pneumatization of the anterior clinoid process, greater wing of the sphenoid, and the pterygoid process was 17.85%, 22.61% and 32.14%, respectively. Protrusion of the internal carotid artery, optic nerve, maxillary nerve, and the vidian nerve was 47.61%, 36.90%, 25% and 26.19%, respectively. Dehiscence of internal carotid artery, optic nerve, maxillary nerve, and the vidian nerve was 30.95%, 29.76%, 14.28% and 22.61%, respectively. The prevalence of pneumatization in the Onodi cells was seen in 17.85% of the cases. Association of septa with an internal carotid artery was seen in 29.7% of the cases. Septa attachment to the optic nerve was also observed in 27.3% of the cases.</p><p class="abstract"><strong>Conclusions:</strong> The triplanar imaging (section thickness of 1 mm) is a better three-dimensional image of the sphenoid sinus, compared to coronal imaging. Triplanar imaging guides the surgical approach of the sphenoid sinus with mentally reconstructed three-dimensional images.</p><p class="abstract"> </p>
Understanding the Role of Sodium Lauryl Sulfate on the Biorelevant Solubility of a Combination of Poorly Water-Soluble Drugs Using High Throughput Experimentation and Mechanistic Absorption Modeling
Authors: Bahr Matthew Nathan , Modi Dimple , Patel Sarsvatkumar , Campbell Gossett , Stockdale Gregory 
Published: June 2019

This study investigates the influence of surfactant sodium lauryl sulfate (SLS) on the solubility of poorly-water soluble drug substances, model Compound X and Compound Y, used in a fixed dose combination oral solid dosage form. To determine the impact of SLS concentration on the solubility of compounds X and Y, we experimentally determined the critical micelle concentration (CMC) of SLS in water, simulated gastric fluid (SGF), and fed state simulated intestinal fluid (FeSSIF) in the presence of Compound X and Compound Y using UV/Visible spectrophotometry at 25°C. The aggregation of SLS was characterized by calculating the standard Gibbs free energy of micellization in all the media investigated. To enhance the understanding of SLS aggregation, high throughput experiments and in-vivo mechanistic modelling were used to determine the effect of increasing levels of SLS on the solubility of compounds X and Y as both single agent and combination products to be formulated into a suitable oral solid dosage form. Micellar formation of SLS is a spontaneous process as shown by the negative values of the standard free energy of micellization. The CMC of SLS in the various media investigated in the presence of compounds X and Y decreases in the following order: water> FeSSIF> SGF. However, the aggregation of SLS in the various media is overall more spontaneous in the following order: SGF>FeSSIF>water. Using high throughput experimentation and in-vivo mechanistic modelling, it was determined that a combination oral solid product of compounds X and Y will have optimum solubility and in-vivo absorption if 2 mg of SLS was used in the oral solid dosage form. The results obtained from this study will help broaden the understanding of the micellization process involving SLS and poorly-water soluble drugs used in combination oral solid dosage forms.
EFEKTIVITAS DAN EFEK SAMPING PENGGUNAAN GABAPENTIN PADA PASIEN NEUROPATI DIABETIK DI RSUP DR. WAHIDIN SUDIROHUSODO MAKASSAR
Authors: Zhulhajsyirah Zhulhajsyirah , Wahyudin Elly , Tammas Jumriani 
Published: June 2019

Penelitian ini bertujuan untuk mengetahui dan menganalisis efektivitas penggunaan gabapentin terhadap penurunan derajat nyeri pada pasien neuropati diabetik di RSUP Wahidin Sudirohusodo Makassar yang diukur dengan menggunakan instrumen Numerical Pain Rating Scale (NPRS) efek samping penggunaan gabapentin pada pasien neuropati diabetik di RSUP DR. Wahidin Sudirohusodo Makassar. Penelitian ini dilaksanakan di Poliklinik Saraf dan Poliklinik Endokrin Instalasi Rawat Jalan RSUP DR. Wahidin Sudirohusodo Makassar pada bulan april-juni 2018. Jenis penelitian ini adalah penelitian observasional non eksperimental dengan desain penelitian cros sectional. Metode yang digunakan dalam penelitian ini adalah dengan melakukan wawancara dan pengukuran skala nyeri pada pasien neuropati diabetik. Data dianalisis dengan menggunakan analisis statistik uji Wicoxon Signed Ranks Test. Hasil penelitian menunjukkan bahwa efek terapi gabapentin sebelum dan sesudah pemberian pada 21 pasien neuropati diabetik menunjukkan adanya penurunan skala nyeri dengan penurunan rata-rata sebesar 2,14 dengan nilai p-value<0,05 yang berarti berbeda secara signifikan dalam menurunkan nyeri neuropati. Sedangkan Efek Samping yang terjadi setelah pemberian gabapentin yaitu, mengantuk dan pusing 14%, mengantuk 29%, pusing 5% dan tidak mengalami efek samping 52%.
PENGARUH BAHAN TAMBAHAN MALTODEXTRIN DAN GOM ARAB TERHADAP KADAR TOTAL POLIFENOL DARI EKSTRAK TEH HIJAU (Camellia sinensis) SETELAH PENYIMPANAN
Authors: Rahmasia Rahmasia , Sartini Sartini , Marzuki Asnah 
Published: June 2019

Teh hijau (Camellia sinensis) mengandung senyawa polifenol utamanya epigallocatechin-3-gallate (EGCG), epigallatocatechin (EGC), epicatechin-3-gallate (ECG), dan epicatechin (EC) yang dapat berfungsi sebagai antioksidan. Senyawa polifenol tidak stabil pada temperatur, pH dan oksigen, sehingga ditambahkan bahan enkapsulasi maltodextrin dan gom arab untuk mempertahankan kadar polifenol selama masa penyimpanan. Penelitian ini bertujuan untuk mengetahui perbandingan bahan maltodextrin dan gom arab sebagai pengenkapsulasi dalam mempertahankan kadar polifenol dari ekstrak teh hijau selama masa penyimpanan. Ekstraksi dilakukan secara remaserasi menggunakan pelarut etanol 70 % dengan perbandingan 1:5. Enkapsulasi ekstrak teh hijau menggunakan maltodextrin dan gom arab, perbandingan ekstrak teh hijau dengan enkapsulasi yaitu 1:5, 1:1 dan 1:2. Pengujian kadar total polifenol menggunakan metode spektrofotometri UV-Vis dengan larutan standar asam galat. Hasil penelitian menunjukkan bahwa enkapsulasi ekstrak teh hijau dapat mempengaruhi kadar total polifenol.