Recently, the synthesis of silver nanoparticles (AgNPs) using plant extracts is fulfilled and considered as ecofriendly method. Plant extracts and extract prepared AgNPs are important because of their economic and medicinal use. This work aimed to prepare Chrysanthemum leaves acetone extract and extract prepared AgNPs and testing their potentials on cell proliferation, bacteria and fungi. Chrysanthemum was collected from Abha city, Saudi Arabia, and acetone extract from its leaves was prepared. AgNPs were prepared using the plant extract. Both extract and prepared AgNPs were examined using scanning electron microscope (SEM), UV/Vis spectra, and Fourier-transform infrared spectroscopy (FTIR). Biological activities found in extract and prepared AgNPs were examined by testing their antimicrobial and proliferative/anti-proliferative effects. Results showed that the extract has many functional groups. The size of AgNPs ranged from 34-100 nm. Both extract and prepared AgNPs have antimicrobial activities and proliferation stimulation potential on normal and activated splenocytes. In conclusion, acetone extract of Chrysanthemum leaves has many functional groups and metabolite that are capable of synthesizing and stabilizing AgNPs formation. The extract and extract prepared AgNPs have medicinal value as they have antibacterial and fungal properties as well as cell proliferation stimulation activities.
ABSTRACT\nBackground: Rheumatic mitral valve disease is still an existing problem of the world. There are different ways to evaluate the mitral stenosis, frequent sequel of rheumatic disease. Echocardiographic methods differ by ease of use. We aimed to search influence of valsalva maneuver onto different methods of measurement of mitral valve area (MVA).\nMethods: Eighty three consecutive patients with mitral stenosis were enrolled. All patients were investigated before and during valsalva maneuver.\nResults: Mean MVA at baseline was 1.62±0.41 cm2 by planimetry, ranging between 1.36-2.31 cm2. In the overall group, Valsalva maneuver did not yield any change in MVA by planimetry, whereas, MVA by PHT slightly decreased, and MVA by PISA increased significantly up on Valsalva. Considering other measurements, gradients, systolic pulmonary artery pressure (PAP), velocities decreased up on Valsalva maneuver, whereas, mean PAP remained stable. There were discrete influences of valsalva according to severity of stenosis, calcification and accompanying mitral regurgitation.\nConclusion: Valsalva maneuver has discrete influences on the modes of measurement of MVA. Since patients may strain involuntarily during echocardiography, potential influences should be kept in mind.\nKey words: Mitral valve area, Planimetry, PHT, PISA, valsalva
The virus lake of the Tila (TiLV), is described as a virus of monocatenario negative-sense RNA, wrapped with a diameter of between 55 and 100 nm, which affects only the tilapias. Highly pathogenic disease is that it produces in the majority of cases accumulated mortalities of up to 100 %, which represents a significant threat to the populations of fish of the genus Oreochromis cultivated or wild. So far there is no effective treatment, no vaccines are available. Therefore, the response focuses on the prevention of the infection. Despite the growing knowledge about TiLV, doubts persist about the reservoirs of the virus, pathogenesis, genetic diversity, and synergistic effects bipotential of co-infection with other viruses circulating. These questions describe the need for research to optimize the monitoring and intervention in the current epidemic of viruses.
The purpose of this study was: (1) to retrospectively analyze the clinical outcome of a complete fixed mandibular prosthesis supported by three tilted distal implants and (2) to assess patient satisfaction with this type of rehabilitation. There were 15 participants included (mean age, 56.3 yrs, age-range 38-69 yrs) with a mean time of 11.2 months after inserting the prosthesis. The bone level was measured by periapical radiographs. To assess patient satisfaction with the prosthesis, patients assigned visual analog scale (VAS) scores to their satisfaction. The implant survival rate was 97.77%, and the prosthesis survival rate, 93.33%. The most frequent complication was the torque loosening of screws. The mean bone level was 1.64 ± 0.77 mm for the straight implants and 0.37 ± 0.56 mm for the tilted implants. The straight implants had a higher bone level when compared with tilted implants (p <0.001). All of the patients reported satisfaction with the aesthetics of the prosthesis. The masticatory ability was considered satisfactory by 86.67%, and 93.34% of the patients interviewed reported satisfaction with prosthesis. Therefore, a complete fixed mandibular prosthesis supported by three tilted distal implants may be an alternative implant treatment for rehabilitation of edentulous patients.
As part of a large case-control study, women with a diagnosis of infertility and with indication of laparoscopy were molecularly screened for twenty microorganisms, including HSV-1/-2 in cervical, endocervical, endometrial, tubal, ovarian and peritoneal sites. We detected HSV-2 and concomitant endometriosis in the ovary of a 32-year-old nulligravida patient suffering from primary infertility for 3 years. Laparoscopy showed normal and patent uterine tubes and moderate endometriosis with superficial deposits and pelvic adhesions in the right sacrouterine ligament, bilaterally in the utero-ovarian ligaments, and the peri-ovarian region. HSV-2 was detected in the ovaries in only this patient out of 51 women tested. No other microorganisms were detected in her upper genital tract (data not shown). Our evidence of HSV-2 infection and concomitant endometriosis in the ovary of an infertile woman further highlights that HSV-2 ovarian infection can be involved in endometriosis-associated infertility. Evidence in this field is still far from being conclusive, and prospective studies should be performed to clarify these aspects.
The recovery of wastewater sludge in agriculture is an opportunity for minimization of waste. Sustainable production approach will be provided by using sugar wastes in agriculture. The aim of this study is to research the effects of sugar industry sludge and pumice on soil properties and the plant growth characteristics as a soil conditioner. For this purpose, a greenhouse experiment was conducted on the soil samples taken from three different locations in Konya where the corn is a primary crop grown. The experiment was established in randomized plots experimental design with three replications. The sludge and pumice were mixed into the soil at four doses (0, 4, 8, 16 tons/da). The silage corn, Pionner 32K61 variety, were used as a test plant. After the harvest, the growth characteristics of corn, such as plant height, plant weight, stalk diameter, stalk weight, number of leaves, leaf weight, leaf dry matter and stalk dry matter were determined. The relationships between the treatments and some plant growth characteristics were evaluated by statistical analysis. Statistically significant relationships were found between the treatments and growth characteristics. The soil properties determined were much better than control application with increasing doses in the three soil samples. The highest productivity was obtained in Atlantı and Hayıroğlu soils with pumice of 16 tons/da dose, in Karapınar soil with pumice + sludge of 16 tons/da dose.
Abstract\nIn this paper we deal with the study of acoustic, mechanic and thermal properties (cp , k, α) of sandwiches for potential insulating demands in transportation. Assumed constructions and used materials differ in “core“ material and lining “skin“ materials to. As a “core“ material was used PET foam Airex T90.100, honeycomb type CORMASTER and natural cork material under the trade name CORECORK NL10. As a coating phenolic prepreg and a composite material based on polyester/ glass was used. Five different sandwiches created from above described components offer thermally or acoustically insulating solutions with proper mechanical parameters.\nKeywords: Acoustic insulation, thermal properties, mechanical properties, sandwiches
Since 1973, the computer-aided design and manufacturing technology has had a close association with the field of restorative dentistry. The digital system for dental restoration comprises data acquisition, prosthesis design, and manufacturing using subtractive or additive methods. As the field of restorative dentistry continues to advance, computer-based digital algorithms, optical scanning, fabricating techniques, and numerical control skills for accuracy have rapidly improved, leading to the development of new materials that are clinically applicable and usable with the new digital technologies. This study reviews the application of computer-aided design and manufacturing technology to prosthodontic restoration in clinical dentistry.
ZnO p-n junction is fabricated using thin layers of solution processed p-type ZnO nanoparticles and n-type ZnO nanoparticles. Materials are characterized by SEM, x-ray diffraction (XRD) and Hall measurement. Thin films of nanoparticles are prepared using dip coating technique and characterized by current-voltage characteristics (under dark and UV illumination) and capacitance-voltage characteristics under ambient condition. Junction shows diode characteristics with a rectification ratio of 16 & 31 at 4 V and turn on voltage 1.9 V and 1.8 V under dark and UV illumination respectively.These results suggest that this p-n junction can be used in high voltage application.
Abstract \nOwing to the exponential growth of information in online social networks, the users of such networks demand the recommendation systems to deliver significant results. A recommendation system rightly suggests the personalized movies that are desirable to the users predominantly from large information storage. Notably, the current research works in movie recommendation system focus on determining the most relevant features from the user profile information and shared contents in the social network. Even though the existing research works recommend the movies that are in proximity to the user preferences, there is a profound need for further exploring the features of the movie and thus ensure the highly desired movies to the users. Hence, this paper targets on recommending the movies with the knowledge of analyzing the movie features along with the data clustering and computational intelligence methods. This article proposes the Cuckoo search based MOst personalized VIEw in item recommendation (C-MOVIE) model, incorporating the missing rating prediction and contextual movie recommendation phases. At first, the C-MOVIE approach explores the features of the movies to recognize the interest of the users in terms of inherent features after reducing the feature dimensionality by Principal Component Analysis (PCA) method. Then, it clusters the users based on the recognized features by K-means clustering and Cuckoo search optimization methods with the intention of grouping the users with similar interests, which eases the missing rating prediction when using Probabilistic Matrix Factorization (PMF). In the end, the C-MOVIE approach contextually recommends the movies to the users by mapping the features of the new movies with the features of the clustered users. The experimental results yielded on Douban movie data set demonstrate that the C-MOVIE approach distinctively delivers the personalized movie recommendation than the existing HPSO method.
The main purposes of preventive health care are disease prevention and health promotion. Health examinations, as a practical application of the proverb “prevention is better than cure,” have numerous benefits. Increasingly more sophisticated hardware and software are available at health examination centers, yet the public remains somewhat reluctant to participate in health examinations. Therefore, understanding the behavioral intentions that drive people’s attitudes toward health examinations is a topic that merits discussion. In this study, we administered questionnaires in face-to-face interviews in Taoyuan, Taiwan. All study participants were volunteers. From the 720 questionnaires we distributed, we received 692 completed questionnaires, resulting in a response rate of 96.1%. The data collected were analyzed using structural equation modeling. The results showed the following: (1) attitude, subjective norms, and perceived behavioral control had significantly positive effects on desire; (2) desire and resource investment had significantly positive effects on behavioral intention; and (3) health literacy had a significant moderating effect on the relationship between desire and behavioral intention. Finally, based on empirical evidence, references for formulating strategies are provided for hospitals and for practitioners who intend to establish health examination centers.
The purpose of the study is to develop a version of the model of innovative activity management of a research university.\nStatistical methods for data collection were used; observation, description of the innovative process in the higher education institution (HEI) were used as empirical methods; comparative and system analysis as logical methods proved useful for comparing innovative systems of universities of different countries.\nThe analysis shows that there are successful examples of research universities in Kazakhstan that have good facilities, infrastructure for the implementation of innovations and academic staff.\nHowever, the system of higher education in the country is not sufficiently focused on technological progress and interdisciplinary knowledge. There are barriers and drivers for the commercialization of scientific developments. \nOriginality of the research is in the development of a model of a research university innovation ecosystem, based on mission, goals and tasks of the HEI; all stages of incubation from the idea to the final product are logically linked. The mechanism of implementing the innovation process includes the system of education quality assurance, involving business- structures, enterprises of the quasi-public sector for incubating ideas and their realization.
The clay samples taken from Turgutlu-Manisa (Turkey) studied area which is located in the Gediz Graben in the Western Anatolia region have been investigated by means of spectroscopic methods and the clay minerals used in the building stones and their effects were criticized. The clay samples taken from studied area that were chemical analyzed with XRF (X-ray Fluorescence Spectrometry) and ICP-MS (Inductively Coupled Plasma-Mass Spectrometry) techniques. The FTIR (Fourier Transform Infrared) spectra of the standard clay minerals- “The World Source Clay Minerals” such as illite, illite-smectite mixed layer, montmorillonite, Ca-montmorillonite, Na-montmorillonite, kaolinite, chlorite (ripidolite), palygorskite were first taken, and then the spectra of anhydrite, gypsum, illite+quartz+feldspar, quartz+feldspar were taken together with the standard clays. The minerals included in the samples taken from the study area were identified by comparing their FTIR spectra with those of the standard clay minerals and XRD (X-ray powder diffraction) results. The DTA (Differential Thermal Analysis)-TGA (Thermogravimetric Analysis) measurements have been carried out for the determinations of the thermal behaviour of the clay samples. It was found that the clay samples include illite, illite-smectite mixed layer, Na-montmorillonite, calcite, feldspar, quartz, gypsum and they have T-O-T (Tetrahedral-Octahedral-Tetrahedral) structure. Shorten the life of the building in the use of clay building stones of rocks. The use of natural materials used in structures after the availability, in terms of long lasting building stones is quite important. The carbonate rocks using in various constructions are mainly composed of calcite. Dolomite, silica and clay minerals of alteration product accompany with this mineral. The mineralogical and petrographic study of Turgutlu-Manisa rock samples during the restoration of the damaged structures, the clay mineral composition of the rocks is found that the degradation rate was more determined. This structure is analyzed restorations are widely used rock mineral composition of 20% quartz, 30�ldspar, 12% calcite, 30% smectite, 3% illite marly limestone, %5 albite-muscovite and trace quantities of amorphous silica and Fe-oxide minerals, respectively. The clay type and their characteristics that cause the decrease of life of the buildings are first examineted and than visual front spoil have been discussed. In the regional scale, the common usage of the carbonate stones containing clay such as marl in the building stones of Turgutlu-Manisa increases the front spoil indensity in visual.\nKeywords: Clay, FTIR, illite, smectite, building stones, Western Anatolia
Coliforms bacteria are used as indicators of contamination, being associated with domestic and industrial wastewater, as a direct result of the proximity to populated areas to estuarine systems as is the case of the delta of the river Rancheria. With the objective of determining the dynamics of total and fecal coliforms in the waters of the delta of the River Rancheria, in five seasons, specifically three in the arm The Riíto (Desembocadura, El Mirador and Villa Fatima) and two in the arm Calancala (Cangrejito and Valle de los Cangrejos), on a monthly basis during the period September 2014-August 2015 water samples were taken to establish their concentration, as well as also determined the BOD, TSS, turbidity, salinity and pH. No significant differences were found in the bacterial densities between the stations sampled, for the periods studied (rainfall and dry ). Mouth had a higher average of total and fecal Cangrejito coliforms in rain (C. total: 12839,4 MPN/100ml; C. fecals: 12625,7 MPN/100ml), and the lower average concentration (C. Total: 1883 MPN/100ml; C. fecal: 1764 MPN/100ml), while in drought Cangrejito station presented the highest average values of total coliforms (totals: 35877,3 MPN/100ml and fecales: 5784,41 MPN/100ml). No correlation was found between the physico-chemical variables and the bacteria except for the turbidity of the water. The microbiological quality of the water in the arms of the delta of the river Rancheria does not comply with the respective national regulations in terms of coliforms bacteria’s, which could bring consequences of sanitation in waters associated with the marine coast with significant tourist activity.
Comparative analysis on performance of different twisted tape inserts in the absorber tube of parabolic trough collector (PTC) were presented in this paper. The heat transfer equations for fully developed flow under quasi-steady state conditions have been developed in order to analyze rise in fluid temperature, thermal efficiency, entropy generation, exergy efficiency and to study the effect of system and operating parameters on performance. A computer program, based on mathematical models is developed in C++ language to estimate the temperature rise of fluid for evaluation of performances under specified conditions. Results show that serrated twisted tape inserts with x= 2, exibits best performance among all other types of inserts. Nusselt number/heat transfer coefficient with serrated twisted tape insert (x=2) is found to be 3.56 and 3.192 times over plain absorber of PTC at mass flow rate of 0.06 kg/s and 0.16 kg/s respectively; while corresponding enhancement in thermal efficiency is 13.63 % and 5.41 % respectively. Also the exergy efficiency has been found to be 15.40 % and 16.46% and corresponding enhancement factor is 1.123 and 1.051 respectively for same set of conditions.
The work deals with application of Sine Cosine Algorithm (SCA) in determining the optimal parameters of proportional-integral derivative (PID) controller for speed control of DC motor. SCA is recently proposed optimization technique which creates multiple initial candidate solutions moving them towards the best solution using a mathematical model based on sine and cosine functions. Here, integral of time multiplied absolute error (ITAE) has been taken as an objective function for tuning the parameters of PID controller by SCA. Comparison of proposed SCA/PID scheme with other existing techniques has also been shown. It has been observed that proposed SCA/PID approach with ITAE as an objective function gives comparable overshoot and other parameters such as; settling and rise times are less when compared with existing approaches in the literature. The robustness analysis of proposed SCA/PID approach has also been carried out with variations in the parameters of DC motor and the results are compared.?
