Aplicación de un cultivo iniciador mixto para la producción de aceituna de mesa

The fermentation of olives is usually carried out spontaneously by natural microbiota. Spontaneous fermentation has some disadvantages, such as the formation of defects in the end product due to the activities of undesirable microorganisms. The use of starter cultures could be a promising option to provide a more controlled fermentation environment and to reduce the risk of spoilage. Mixed starter culture use (generally selected Lactobacillus strains with or without yeasts) could reduce pH in a shorter time, producing a higher amount of lactic acid and enhancing microbial safety compared to fermentation with starter cultures containing single species or natural fermentation. Their use could also enhance the organoleptical properties of table olives. Particularly the use of yeast (such as strains of W. anomolus, S. cerevisiae) in the fermentation of olives, in combination or sequentially with lactic acid bacteria could result in an increase in volatile compounds and a more aromatic final product.La fermentación de la aceituna generalmente se lleva a cabo espontáneamente por la microbiota natural. Sin embargo, la fermentación espontánea tiene algunas desventajas, como la formación de defectos en el producto final debido a las actividades de microorganismos indeseables. El uso de cultivos iniciadores podría ofrecerse como una opción importante para proporcionar un entorno de fermentación más controlado y reducir el riesgo de deterioro. El uso de cultivos mixtos iniciadores (cepas generalmente seleccionadas de Lactobacillus con/sin levaduras) podría reducir el pH en un tiempo más corto, produciendo una mayor cantidad de ácido láctico y mejorando la seguridad microbiana, en comparación con la fermentación con cultivos iniciadores que contienen especies individuales o fermentación natural. Su uso también podría mejorar las propiedades organolépticas de las aceitunas de mesa. En particular, el uso de la levadura (como las cepas de W. anomolus, S. cerevisiae) en la fermentación de aceitunas, en combinación o secuencialmente con bacterias de ácido láctico podría dar lugar a un aumento de los compuestos volátiles y a la obtención de un producto final más aromático

The reliability of national videos related to the kidney stones on YouTube

Objective: Kidney stones are one of the most common disorders of the urinary tract. With increasing awareness, a larger proportion of patients are seeking medical knowledge from the Internet. In present study, the features, reliability and efficacy of videos on YouTube related to the treatment of kidney stones were evaluated. Material and methods: In December 2014, YouTube was searched using keywords “nephrolithiasis”; “renal calculi”; “renal stones”; and “kidney stones” for videos uploaded containing relevant information about the disease. Only videos in Turkish were included in the study. Two physician viewers watched each video and classified them as useful, partially useful and useless according to European Association of Urology (EAU) Guidelines. The source, length, number of views, number of favourable opinions, and days since uploaded date of the all videos were evaluated. Results: A total of 600 videos were analysed The median length of videos was 6.7±10.4 (median: 3, IQR: 0.03-58) minutes . Each video was viewed at an average of 2368 (min: 11, max: 97133) times. Most of the videos (32.8%) were created by academicians and physicians. Nearly half (47.4%) of the videos were uploaded in 2014. The majority of the videos (62.5%) contained information for treatment. Percutaneous nephrolithotomy and ureterorenoscopy were the most common treatment modalities (32.8% and 28.0%, respectively) in these videos. A statistically significant difference was not detected between view numbers and source of videos (p=0.87). However, there was a statistically significant difference between usefulness to the viewers and source of videos. Hospital -based videos were detected to be more useful (p=0.000). Conclusion: As a result, videos that would be prepared in internet environment by professional individuals or organizations in a way which would attract attention and be easily comprehended by the public could contribute to the knowledge and education of our society about the stone disease which is commonly seen in our country. © 2016 by Turkish Association of Urology

Çeşitli yaş gruplarında furkasyon problemlerinin görülme sıklığı

Purpose: Invasion of the furcation area of the multi-rooted teeth with periodontal disease is one of the common complications. The aim of the study was to evaluate the prevalence of furcation problems. Material and Methods: In the study, 609 molars were evaluated in 97 patients whose age range 30-75 (45.2±9.73) with nabers probe and radiographs. According to the evaluation, one score was given to each molar. The study consisted of 49 women and 48 men with 33 current smokers and 64 nonsmoker. Results: It was determined that the prevalence and degree of furcation involvement were increasing with age. The frequency of furcation involvement was higher in the mandible than in the maxilla. According to the first and the second molars, furcation involvement of degree I and II was higher on the second molars; furcation involvement of degree III and IV was higher on the first molars. Men had higher frequency of furcation involvement than woman and in smokers; frequency of furcation involvement was higher than nonsmokers. Conclusion: In conclusion, the results of this study showed that the prevalence and degree of furcation involvement deteriorated with increasing ages in molars and there were influences of localization of teeth, gender, smoking on the frequency and degree of furcation involvement.   ÖZET Amaç: Periodontal hastalıklı çok köklü dişlerin furkasyon bölgesinin tutulumu sık rastlanan komplikasyonlardan birisidir. Bu çalışmada belirli yaş gruplarında furkasyon problemlerinin prevelansının değerlendirilmesi amaçlanmıştır. Gereç ve Yöntem: Çalışmada yaşları 30 ile 75 (ort: 45.2±9.73 yaş) arasında değişen 97 hastada toplam 609 molar dişin furkasyon tutulumları nabers sondu ve radyograflarıyla değerlendirilerek her dişe bir skor verildi. Çalışmaya dahil edilen hastaların 49’u kadın 48’i erkek olup sigara içen toplam birey sayısı 33’tü. Bulgular: Her molar diş için furkasyon problemi görülme sıklığının ve derecesinin yaşla birlikte arttığı belirlendi. Mandibular molar dişlerin furkasyon tutulum derecelerinin ve sıklığının maksillar molar dişlere göre daha fazla olduğu tespit edildi. 1. ve 2. molarlara göre furkasyon problemi görülme sıklığının karşılaştırılmasıyla I. ve II. derece furkasyon problemlerinin 2. molarlarda, III. ve IV. derece furkasyon problemlerinin ise 1. molarlarda daha fazla olduğu belirlendi. Ayrıca erkeklerde kadınlara göre, sigara içenlerde ise içmeyenlere göre furkasyon problemlerinin daha fazla sıklıkta görüldüğü tespit edildi. Sonuç: Molar dişlerde furkasyon problemlerinin görülme sıklığı ve derecesi yaşla birlikte artmaktadır. Dişin alt ya da üst çenede bulunmasının, 1. ya da 2. molar olmasının, cinsiyetin ve sigara kullanımının furkasyon problemlerinin görülme sıklığı üzerine etkili olduğu tespit edildi. Anahtar kelimeler: Furkasyon problemleri, periodontiti

Growth of (110) Diamond using pure Dicarbon

We use a density-functional based tight-binding method to study diamond growth steps by depositing dicarbon species onto a hydrogen-free diamond (110) surface. Subsequent C_2 molecules are deposited on an initially clean surface, in the vicinity of a growing adsorbate cluster, and finally, near vacancies just before completion of a full new monolayer. The preferred growth stages arise from C_2n clusters in near ideal lattice positions forming zigzag chains running along the [-110] direction parallel to the surface. The adsorption energies are consistently exothermic by 8--10 eV per C_2, depending on the size of the cluster. The deposition barriers for these processes are in the range of 0.0--0.6 eV. For deposition sites above C_2n clusters the adsorption energies are smaller by 3 eV, but diffusion to more stable positions is feasible. We also perform simulations of the diffusion of C_2 molecules on the surface in the vicinity of existing adsorbate clusters using an augmented Lagrangian penalty method. We find migration barriers in excess of 3 eV on the clean surface, and 0.6--1.0 eV on top of graphene-like adsorbates. The barrier heights and pathways indicate that the growth from gaseous dicarbons proceeds either by direct adsorption onto clean sites or after migration on top of the existing C_2n chains.Comment: 8 Pages, 7 figure

Clinical comprehensive and experimental assessment of the radioprotective effect of Annona muricata leaf extract to prevent cellular damage in the ileum tissue

We report the radioprotective attitude of Annona muricata (AM) leaf extract as antioxidant material to prevent cellular damage in the ileum tissue. The protective effects of an ethyl acetate extract of AM leaves are comprehensively investigated against radiation-induced ileal damage in numerous rats. Thirty-two adult female rats were separated into 4 groups (3 intervention groups and 1 control) as follows: controls received 0.01 mL/kg distilled water, the AM group received 300 mg/kg AM leaf extract, the ionizing radiation (IR) group received a single dose of whole body radiation (8.3 Gy) after 0.01 mL/kg saline treatment, and the AM + IR group received 300 mg/kg AM leaf extract treatment and were subjected to whole body radiation (8.3 Gy) 1 h after the last gavage. All treatments are administered by oral gavage once a day for 9 days. At the end of the experiment, biochemical total oxidant status (TOS, interleukin-6, and caspase) and histological examinations are performed on blood samples as well as ileum tissue. TOS levels are found to be significantly high in rats, which received irradiation, and those in the AM group when compared to controls. These findings suggest that AM has radioprotective effects on ileum tissue, likely because of its antioxidative properties. The findings of this research may contribute to the minimizing of major side effects induced by excessive radiation exposure in patients undergoing radiotherapy and may serve as a significant impetus for further assessments. However, future studies are highly recommended to confirm safety and to determine extraction technique and dosage before human use can be considered. © 2022 Ozlem Elmas et al.Dunarea de Jos” University of Galati, (RF 3621/2021)Universitatea 'Dunărea de Jos' Galați, UDJGFunding text 1: Funding information: The work of Antoaneta ENE and the APC were supported by Dunarea de Jos University of Galati, Romania through the grant no. RF 3621/2021.Funding text 2: Author contributions: O.E., H.H.K.S., and H.O.T.: – conceptualization and methodologyE.K., B.G., G.A., and R.U.E.: validationG.A. and H.M.H.Z.: formal analysisO.E., H.H.K.S., E.K., B.G., and H.O.T.: writing and reviewO.E., H.H.K.S., E.K., B.G., and A.E.: investigationA.E.: funding acquisition through APC by “Dunarea de Jos” University of Galati, Romania through the grant no. RF 3621/2021

Diagnostic and therapeutic radioisotopes in nuclear medicine: Determination of gamma-ray transmission factors and safety competencies of high-dense and transparent glassy shields

We present the findings of an extensive examination on newly designed CdO-rich and transparent glass shields for nuclear medicine facilities in lieu of traditional and unfavorable materials, such as lead and concrete. Gamma-ray transmission factors of newly designed glass shields are determined using a variety of diagnostic, therapeutic, and research radioisotopes, including 67Ga, 57Co, 111In, 201Tl, 99mTc, 51Cr, 131I, 58Co, 137Cs, 133Ba, and 60Co. A general-purpose Monte Carlo code MCNPX (version 2.7.0) is used to determine the attenuation parameters of different material thicknesses. Next, the findings are compared using a standard concrete shielding material. The results indicate that adding more CdO to the glass composition improves the overall gamma-ray attenuation properties. As a result, among the heavy and transparent glasses developed, the C40 sample containing 40% CdO exhibited the best gamma-ray absorption properties against all radioisotopes. Furthermore, the gamma-ray absorption characteristics of this created high-density glass were shown to be better to those of a standard and heavy concrete sample. It can be concluded that the newly developed CdO-rich and transparent glass sample may be used in medical radiation fields where the radioisotopes examined are used in daily clinical and research applications. © 2022 De Gruyter. All rights reserved.Princess Nourah Bint Abdulrahman University, PNU: PNURSP2022R149Funding information: This study was supported by Princess Nourah bint Abdulrahman University Researchers Supporting Project Number (PNURSP2022R149)

Tribological performance of novel Nickel-based composite coatings with lubricant particles

Abstract The present study is focused on the evaluation of the tribological performance of novel Ni/hBN and Ni/WS2 composite coatings electrodeposited from an additive-free Watts bath with the assistance of ultrasound. Lubricated and non-lubricated scratch tests were performed on both novel composite coatings and on standard Ni deposits used as a benchmark coating to have an initial idea of the effect of the presence of particles within the Ni matrix. Under lubricated conditions, the performance of the Ni/hBN composite coating was very similar to the benchmark Ni coating, whereas the Ni/WS2 behaved quite differently, as the latter did not only show a lower coefficient of friction, but also prevented the occurrence of stick-slip motion that was clearly observed in the other coatings. Under non-lubricated conditions, whereas the tribological performance of the Ni/hBN composite coating was again very similar to that of the benchmark Ni coating, the Ni/WS2 composite coatings again showed a remarkable enhancement, as the incorporation of the WS2 particles into the Ni coating not only resulted in a lower coefficient of friction, but also in the prevention of coating failure

Altered hip muscle forces during gait in people with patellofemoral osteoarthritis

Objectives: The study aimed to (1) assess whether higher vasti (VASTI), gluteus medius (GMED), gluteus maximus (GMAX) and gluteus minimus (GMIN) forces are associated with participant characteristics (lower age, male gender) and clinical characteristics (lower radiographic disease severity, lower symptom severity and higher walking speed); and (2) determine whether hip and knee muscle forces are lower in people with patellofemoral joint (PFJ) osteoarthritis (OA) compared to those without PFJ OA. Design: Sixty participants with PFJ OA and 18 (asymptomatic, no radiographic OA) controls ≥40 years were recruited from the community or via referrals. A three-dimensional musculoskeletal model was used in conjunction with optimisation theory to calculate lower-limb muscle forces during walking. Associations of peak muscle forces with participant and clinical characteristics were conducted using Pearson's r or independent t-tests and between-group comparisons of mean peak muscle forces performed with walking speed as a covariate. Results: Peak muscle forces were not significantly associated with participant, symptomatic or radiographic-specific characteristics. Faster walking speed was associated with higher VASTI muscle force in the PFJ OA (r = 0.495; P < 0.001) and control groups (r = 0.727; P = 0.001) and higher GMAX muscle force (r = 0.593; P = 0.009) in the control group only. Individuals with PFJ OA (N = 60) walked with lower GMED and GMIN muscle forces than controls (N = 18): GMED, mean difference 0.15 [95% confidence interval (CI): 0.01 to 0.29] body weight (BW); GMIN, 0.03 [0.01 to 0.06] BW. No between-group differences were observed in VASTI or GMAX muscle force: VASTI, 0.10 [-0.11 to 0.31] BW; GMAX, 0.01 [-0.11 to 0.09] BW. Conclusion: Individuals with PFJ OA ambulate with lower peak hip abductor muscle forces than their healthy counterparts

Tribological performance of an H-DLC coating prepared by PECVD

Carbon-based coatings are of wide interest due to their application in machine elements subjected to continuous contact where fluid lubricant films are not permitted. This paper describes the tribological performance under dry conditions of duplex layered H-DLC coating sequentially deposited by microwave excited plasma enhanced chemical vapour deposition on AISI 52100 steel. The architecture of the coating comprised Cr, WC, and DLC (a-C:H) with a total thickness of 2.8 μm and compressive residual stress very close to 1 GPa. Surface hardness was approximately 22 GPa and its reduced elastic modulus around 180 GPa. Scratch tests indicated a well adhered coating achieving a critical load of 80 N. The effect of normal load on the friction and wear behaviours were investigated with steel pins sliding against the actual coating under dry conditions at room temperature (20 ± 2°C) and 35-50% RH. The results show that coefficient of friction of the coating decreased from 0.21 to 0.13 values with the increase in the applied loads (10-50 N). Specific wear rates of the surface coating also decrease with the increase in the same range of applied loads. Maximum and minimum values were 14 × 10-8 and 5.5 × 10-8 mm-3/N m, respectively. Through Raman spectroscopy and electron microscopy it was confirmed the carbon-carbon contact, due to the tribolayer formation on the wear scars of the coating and pin. In order to further corroborate the experimental observations regarding the graphitisation behaviour, the existing mathematical relationships to determine the graphitisation temperature of the coating/steel contact as well as the flash temperature were used

Genetics and genetic counseling: Practices and opinions of primary care physicians in Turkey

PURPOSE: The purpose of this study was to assess the educational needs of physicians relating to genetics and genetic counseling in the Denizli region of Turkey. METHODS: Data were collected by questionnaire about physicians' approaches to genetics and genetic counseling. RESULTS: A total of 60 (60.0%) of 100 physicians working in Denizli province returned a questionnaire. Physicians described "their most knowledgeable subjects" in basic genetic information as chromosome abnormalities (41.8%), in genetic disorders as xeroderma pigmentosum (80.0%), and in genetic counseling as directing the parents of and couples with a risk for having a child affected by a genetic disease to an expert or a genetic counseling center (94.8%). Only 20.7% knew the ethical regulations and techniques related to genetic counseling. Physicians thought that they did not have sufficient knowledge about genetics or genetic counseling, and 83.9% would like to attend an educational course. CONCLUSIONS: As a result of this study, a genetics course is planned for physicians so they can actively participate in the prevention and early diagnosis of genetic diseases. ©2007The American College of Medical Genetics