Efficacy of Trigger Point Injections in Patients with Lumbar Disc Hernia without Indication for Surgery

Bahar Dernek,Levent Adiyeke,Tahir Mutlu Duymus,Akın Gokcedag,Fatma Nur Kesiktas,Cihan Aksoy 대한척추외과학회 2018 Asian Spine Journal Vol.12 No.2

Study Design: Prospective comparative study. Purpose: To investigate the efficacy of gluteal trigger point (TP) injections with prilocaine in patients with lumbosacral radiculopathy complaining of gluteal pain. Overview of Literature: TP injections can be performed using several anesthetic agents, primarily lidocaine and prilocaine. While several studies have used lidocaine, few have used prilocaine. Methods: A total of 65 patients who presented at the polyclinic with complaints of lower back pain with lumbar disc herniation (based on physical examination and magnetic resonance imaging) and TPs in the gluteal region were included in this prospective comparative study. Group 1 comprised 30 patients who were given TP injections, a home exercise program, and oral medications, and group 2 comprised 35 patients who were only treated with a home exercise program and oral medications. The patients’ demographic data, Oswestry Disability Index (ODI) scores, and Visual Analog Scale (VAS) scores were recorded, and these data were evaluated at 1- and 3-month follow-ups. Results: The ODI and VAS scores of both groups significantly decreased initially and at the follow-up examinations, but the decreases were more marked in group 1. Conclusions: We obtained better results with TP injections than only a home exercise program and oral medications in patients with radiculopathy and TPs in the gluteal region.

Pectin extraction from citron peel: optimization by Box–Behnken response surface design

Bahare Pasandide,Faramarz Khodaiyan,Zeinab Mousavi,Seyed Saeid Hosseini 한국식품과학회 2018 Food Science and Biotechnology Vol.27 No.4

In this study, the effect of acidic extraction conditions (time of 30–90 min, temperature of 75–95 C and pH of 1.5–3) on the yield and degree of esterification (DE) of citron peel pectin was investigated applying Box– Behnken design. The highest production yield of pectin (28.31 ± 0.11%) was achieved at extraction time of 90 min, temperature of 95 C and pH of 1.5, as optimal extraction conditions, which was close to the predicted value (29.87%). Under optimum extraction conditions, the DE and the emulsifying activity were 51.33 and 46.2%, respectively. In addition, the emulsions were 93.9 and 93.5 stable at 4 C, 93.7 and 93.1 at 23 C after 1 and 30 days, respectively. The determination of flow behavior showed that the pectin solutions had a Newtonian behavior at low concentrations (\1.0% w/v), while this behavior was changed to pseudoplastic with increasing concentration.

Bioactivity of endodontic biomaterials on dental pulp stem cells through dentin

Bahar Javid,Narges Panahandeh,Hassan Torabzadeh,Hamid Nazarian,Ardavan Parhizkar,Saeed Asgary 대한치과보존학회 2020 Restorative Dentistry & Endodontics Vol.45 No.1

Objectives: This study investigated the indirect effect of calcium-enriched mixture (CEM) cement and mineral trioxide aggregate (MTA), as 2 calcium silicate-based hydraulic cements, on human dental pulp stem cells (hDPSCs) through different dentin thicknesses. Materials and Methods: Two-chamber setups were designed to simulate indirect pulp capping (IPC). Human molars were sectioned to obtain 0.1-, 0.3-, and 0.5-mm-thick dentin discs, which were placed between the 2 chambers to simulate an IPC procedure. Then, MTA and CEM were applied on one side of the discs, while hDPSCs were cultured on the other side. After 2 weeks of incubation, the cells were removed, and cell proliferation, morphology, and attachment to the discs were evaluated under scanning electron microscopy (SEM). Energy-dispersive X-ray (EDXA) spectroscopy was performed for elemental analysis. Alkaline phosphatase (ALP) activity was assessed quantitatively. The data were analyzed using the Kruskal-Wallis and Mann-Whitney tests. Results: SEM micrographs revealed elongated cells, collagen fibers, and calcified nucleations in all samples. EDXA verified that the calcified nucleations consisted of calcium phosphate. The largest calcifications were seen in the 0.1-mm-thick dentin subgroups. There was no significant difference in ALP activity across the CEM subgroups; however, ALP activity was significantly lower in the 0.1-mm-thick dentin subgroup than in the other MTA subgroups (p < 0.05). Conclusions: The employed capping biomaterials exerted biological activity on hDPSCs, as shown by cell proliferation, morphology, and attachment and calcific precipitations, through 0.1- to 0.5-mm-thick layers of dentin. In IPC, the bioactivity of these endodontic biomaterials is probably beneficial.

In-situ Synthesis of SiO2 Nanoparticles on Polyester Fabric as Benign Multi-purpose Catalysts

Bahare Nozari,Majid Montazer,Mahnaz Mahmoudi Rad 한국섬유공학회 2018 Fibers and polymers Vol.19 No.12

Here, silica nanoparticles (NPs) as safe multi-purpose catalysts were in situ synthesized on PET fabric to achieve a higher quality fabric. The PET fabric was treated in an aqueous solution of sodium silicate and ammonia at boil for 1 h to insitu synthesis silica NPs along with aminolysis of the fabric. Effect of silica NPs as the multi-purpose catalysts on the fabric were subjected to various analysis such as self-cleaning, hydrophilic, antibacterial and antifungal properties and also thermal resistance. The surface morphology, the crystalline structure and elemental analysis were studied by Field emission scanning electron microscopy (FESEM), X-ray diffraction (XRD) and map and energy dispersive X-ray (EDX) analysis. The optimized treated fabric indicated 4 s for the water to spread and 65 o for contact angle provided higher hydrophilic properties. Silica NPs on the fabric showed thermo-catalytic behavior protecting against yellowing at high temperature (200 oC for 3 h) proved the higher thermal resistance of the treated fabric. Also, the fabric specified good self-cleaning properties through discoloration of methylene blue solution. Further, the treated fabric proposed 100 % anti-bacterial and anti-fungal activities against Staphylococcus aureus, Escherichia coli and Candida albican along with good cell viability. Overall, this research indicates silica NPs as multi-purpose catalysts including photo, bio and thermo-catalyst on the PET fabric using low price materials.

Performance of Structural Lightweight Concrete containing Metakaolin after Elevated Temperature

Bahar Demirel,Ezgi Gultekin,Kursat Esat Alyamac 대한토목학회 2019 KSCE JOURNAL OF CIVIL ENGINEERING Vol.23 No.7

The aim of the current research is to determine the multiple influences of the amount of metakaolin and high temperature on the compressive strength of structural lightweight concrete (SLWC) applying response surface method (RSM). For this purpose, the lightweight concrete specimens were produced by pumice sand, and metakaolin replacing with cement at different ratios. The unit weight of hardened concrete, 28-day compressive strength, elevated temperature, ultrasonic pulse velocity, and sorptivity tests were performed. Moreover, then, two variables defined as the elevated temperature of 20, 400, 600, and 800 °C, and the metakaolin-tocement ratio of 0%, 5%, 11%, 18%, and 25%, to obtain the compressive strength of structural lightweight concrete. The effects of each variable on the response which is the compressive strength were determined following the ANOVA (analysis of variation) analysis, and the equation of the model was developed. Eventually, the developed equation could be utilized to estimate the compressive strength of the structural lightweight concrete for requested values of each variable.

A Fuzzy Multi-Objective Linear Programming Model

Bahar Ozyoruk,Nilay Donmez 대한산업공학회 2014 Industrial Engineeering & Management Systems Vol.13 No.3

Supply chain management is a subject that has an increasing importance due to the developments in the global markets and technology. In this paper, a fuzzy multi-objective linear programming model is developed for the supply chain of a company dealing with procurement, storage, filling, and distribution of liquefied petroleum gas (LPG) in Turkey. The model intends to determine the quantities of LPG to be procured, stored, filled to cylinders, and transported between the plants and demand centers for six planning periods. In this model, which aims to minimize both total costs (sum of procurement, storage, filling, and transportation costs) and total transportation distances, demand quantities of the main demand centers and decision maker’s aspiration levels about objective functions are fuzzy. After comparing the results obtained from the model with those obtained by using different methods, it is concluded that the proposed method can be applied to real world problems practically and it may be used in this type of problems in order to generate an efficient solution.

CLINICAL EXPERIENCE WITH STRESS AND DELAYED THALLIUM-201 QUANTITATIVE SEGMENTAL WASHOUT CURVES (QSWC)

Bahar, R. H.,Hassan, I. M.,Mohamrred, M. M.,Sayed, M. El,Ziada, G.,Simo, G.,Dayem, H. M. Abdel 대한핵의학회 1984 핵의학 분자영상 Vol.18 No.1

Ethnobotanical research in Sürmene district (Trabzon-Turkey, Black Sea Region)

Bahar Gürda,Fatma Öztürk 경희대학교 융합한의과학연구소 2022 Oriental Pharmacy and Experimental Medicine Vol.22 No.2

Traditional knowledge of plants is inter-generationally transferred. It is important to keep proper records in order to avoid the loss of the ethnobotanical heritage. This study is an ethnobotanical survey conducted in Sürmene district in the Black Sea Region of Trabzon-Turkey. The study was conducted between 2018 and 2019. Plants were collected from different altitudes in the district. The required information was collected through ethnobotanical interviews with local people. Use value of species was determined and informant consensus factor was calculated for medicinal plants included in the study. In this study, eighty-two taxa belonging to 42 families were identified. Sixty-six of them are natural, while 16 of them are cultivated plants. One of the species is endemic, Anthemis melanoloma subsp. trapezuntica Grierson. Of the collected plants, 54 taxa are used for medical purposes, 31 is used for food, 17 is used for animal fodder, 16 is used as fuel, 3 is used as honey plant, 2 is used as organic fertilizers, and 16 is used for different purposes. Most of the plants used in the district belong to the families Asteraceae (11 species), Rosaceae (9 species), Lamiaceae (6 species), Poaceae (4 species), and Ericaceae (4 species). Of all the medicinal plants, Citrus sinensis, Actinidia deliciosa, Mentha × piperita, and Thymus nummularius seem are well-known to the locals, as indicated by their high UV. In conclusion, this study collected information regarding the traditional uses of plants in Sürmene district and also helped to preserve the valuable information. Ethnobotanical studies are increasing the possibilities of identifying new molecules; thus, this study may serve as a basis for future pharmacological and phytochemical studies which could lead to the discovery and development of new pharmaceuticals.

Seismic protection of smart base-isolated structures using negative stiffness device and regulated damping

Bahar, Arash,Salavati-Khoshghalb, Mohsen,Ejabati, Seyed Mehdi Techno-Press 2018 Smart Structures and Systems, An International Jou Vol.21 No.3

Strong seismic events commonly cause large drift and deformation, and functionality failures in the superstructures. One way to prevent functionality failures is to design structures which are ductile and flexible through yielding when subjected to strong ground excitations. By developing forces that assist motion as "negative stiffness forces", yielding can be achieved. In this paper, we adopt the weakening and damping method to achieve a new approach to reduce all of the structural responses by further adjusting damping phase. A semi-active control system is adopted to perform the experiments. In this adaptation, negative stiffness forces through certain devices are used in weakening phase to reduce structural strength. Magneto-rheological (MR) dampers are then added to preserve stability of the structure. To adjust the voltage in MR dampers, an inverse model is employed in the control system to command MR dampers and generate the desired control forces, where a velocity control algorithm produces initial required control force. An extensive numerical study is conducted to evaluate proposed methodology by using the smart base-isolated benchmark building. Totally, nine control systems are examined to study proposed strategy. Based on the numerical results of seven earthquakes, the use of proposed strategy not only reduces base displacements, base accelerations and base shear but also leads to reduction of accelerations and inter story drifts of the superstructure. Numerical results shows that the usage of inverse model produces the desired regulated damping, thus improving the stability of the structure.

Some integral curves associated with a timelike Frenet curve in Minkowski 3-space

Bahar Uyar Duldul 호남수학회 2017 호남수학학술지 Vol.39 No.4

In this paper, we give some relations related with a spacelike principal-direction curve and a spacelike binormal-direction curve of a timelike Frenet curve. The Darboux-direction curve and the Darboux-rectifying curve of a timelike Frenet curve in Minkowski 3-space $E_1^3$ are introduced and some characterizations related with these associated curves are given. Later we define the spacelike ${\bf V}$-direction curve which is associated with a timelike curve lying on a timelike oriented surface in $E_1^3$ and present some results together with the relationships between the curvatures of this associated curve.