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As a Thermal Process Contaminant Acrylamide: Formation Mechanisms and Strategies of Reducing Acrylamide Content in Meat Products Full text
2019
Hülya Serpil Kavuşan | Meltem Serdaroglu
As a Thermal Process Contaminant Acrylamide: Formation Mechanisms and Strategies of Reducing Acrylamide Content in Meat Products Full text
2019
Hülya Serpil Kavuşan | Meltem Serdaroglu
Acrylamide is a carcinogenic and mutagenic compound which is formed by the oxidation of the acrolein compound or the as a result of reactions between reducing sugars and asparagine amino acids. Although acrylamide is mostly seen in carbohydrate-based foods, frying, steaming and baking processes lead to formation of acrylamide also in protein containing meat products with composite structure. Type and the cycle of frying oil, the precursors present in the system, the cooking method, temperature, time and storage can be listed as factors affecting acrylamide formation in meat products. The adverse effects of acrylamide on health create a need for application of acrylamide reduction strategies. These strategies encompass the reduction of the precursor substances, heat treatment time and temperature as much as possible, addition of various cations, enzymes, amino acids and antioxidants to the system and removal of the resulting acrylamide compound from the system. In this review, it was aimed to clarify the factors affecting the formation of acrylamide and strategies for reducing the amount of acrylamide in meat products.
Show more [+] Less [-]Variabilidad espacial de propiedades físicas y químicas en suelos de la granja experimental de la Universidad del Magdalena (Santa Marta, Colombia) Full text
2010
José Rafael Vásquez Polo | Diosdado Baena Garcia | Juan Carlos Menjivar Flores
En suelos destinados a la actividad agrícola de la granja experimental de la Universidad del Magdalena, Santa Marta - Colombia (74° 07' Y 74° 12' longitud oeste y 11° 11' y 11° 15' latitud), se estudió la variabilidad espacial de las propiedades físicas: humedad gravimétrica, textura, densidad aparente (Da), resistencia a la penetración (RP) y conductividad hidráulica (KH) y químicas: Materia orgánica (MO), pH, CIC, N, P, K, Ca+2, Mg+2, Na+, Cu, Zn, Fe, Mn, B), utilizando una grid o malla de 29m*29m con 184 puntos de muestreo. El análisis de los datos se realizó empleando enfoques univariado, geoestadístico y multivariado. El análisis estadístico de los resultados mostró gran variabilidad de las propiedades; la densidad aparente y el pH presentaron baja variación; los componentes texturales, la RP, Ca+2, Mg+2, Cu y B mostraron variación media, mientras que la humedad gravimétrica, KH, MO, K+, Na+, CIC, Zn, P, Mn y Fe, expresaron alta variación. Con el análisis Geoestadístico se visualizó y graficó la variabilidad de cada propiedad evaluada y se evidenció la existencia de moderada dependencia espacial en las propiedades excepto en los contenidos de arena, Ca+2, CIC, P y Cu que revelan fuerte dependencia espacial. El índice de homogeneidad multivariado para los suelos en estudio fue bajo, siendo textura, Na+, B, Fe, K, pH, Ca y MO las propiedades con mayor contribución a la heterogeneidad. El análisis de clasificación permitió agrupar cuatro zonas con condiciones edáficas similares, las que se podrán utilizar para determinar el sistema de muestreo, número de muestras, tamaño y distribución de unidades experimentales y con ello facilitar la implementación de prácticas de manejo agronómico acordes con las características de cada zona.
Show more [+] Less [-]Variabilidad espacial de propiedades físicas y químicas en suelos de la granja experimental de la Universidad del Magdalena (Santa Marta, Colombia) Full text
2010
Vásquez Polo, José Rafael(Universidad del Magdalena) | Baena Garcia, Diosdado(Universidad Nacional de Colombia sede Palmira) | Menjivar Flores, Juan Carlos(Universidad Nacional de Colombia sede Palmira)
En suelos destinados a la actividad agrícola de la granja experimental de la Universidad del Magdalena, Santa Marta - Colombia (74° 07' Y 74° 12' longitud oeste y 11° 11' y 11° 15' latitud), se estudió la variabilidad espacial de las propiedades físicas: humedad gravimétrica, textura, densidad aparente (Da), resistencia a la penetración (RP) y conductividad hidráulica (KH) y químicas: Materia orgánica (MO), pH, CIC, N, P, K, Ca+2, Mg+2, Na+, Cu, Zn, Fe, Mn, B), utilizando una grid o malla de 29m*29m con 184 puntos de muestreo. El análisis de los datos se realizó empleando enfoques univariado, geoestadístico y multivariado. El análisis estadístico de los resultados mostró gran variabilidad de las propiedades; la densidad aparente y el pH presentaron baja variación; los componentes texturales, la RP, Ca+2, Mg+2, Cu y B mostraron variación media, mientras que la humedad gravimétrica, KH, MO, K+, Na+, CIC, Zn, P, Mn y Fe, expresaron alta variación. Con el análisis Geoestadístico se visualizó y graficó la variabilidad de cada propiedad evaluada y se evidenció la existencia de moderada dependencia espacial en las propiedades excepto en los contenidos de arena, Ca+2, CIC, P y Cu que revelan fuerte dependencia espacial. El índice de homogeneidad multivariado para los suelos en estudio fue bajo, siendo textura, Na+, B, Fe, K, pH, Ca y MO las propiedades con mayor contribución a la heterogeneidad. El análisis de clasificación permitió agrupar cuatro zonas con condiciones edáficas similares, las que se podrán utilizar para determinar el sistema de muestreo, número de muestras, tamaño y distribución de unidades experimentales y con ello facilitar la implementación de prácticas de manejo agronómico acordes con las características de cada zona. | We have studied the spatial variability of agricultural soils in the experimental farm at Magdalena University (Santa Marta, Colombia; 74° 07' - 74° 12' W, 11° 11' - 11° 15' N). Analyzed soil properties included: gravimetric soil moisture content, grain size analysis, bulk density, resistance to root penetration, hydraulic conductivity, organic matter content, pH, cation exchange capacity, total N and P, exchangeable cations (Ca+2, Mg+2, K+, Na+), metals (Cu, Zn, Fe , Mn) and B content. Sampling was based on a 29 x 29 m grid, resulting in 184 sampling points. Data analysis was done using univariate, multivariate and geostatistical approaches. The analyzed soil properties showed different degrees of variability: bulk density and pH low variability; grain size, resistance to root penetration, divalent exchangeable cations (Ca+2 and Mg+2), Cu and B intermediate variability; while moisture content, hydraulic conductivity, organic matter content, monovalent exchangeable cations (K+, Na+), cation exchange capacity, Zn, P Mn and Fe a large variability. The geostatistical analysis revealed the presence of moderate spatial dependency, except for sand content, exchangeable Ca+2, cation exchange capacity, P and Cu, which showed strong spatial dependency. The multivariate homogeneity index was low, being exchangeable Na+, B, Fe, K, pH and organic matter content the soil properties with lager contributions to heterogeneity. Classification analysis enabled to indentify four areas with similar edaphic conditions, which will allow to stablish the sampling strategy, number of samples, size and distribution of experimental units and thus to improve the implementation of agronomic management practices in agreement with the characteristics of the soils.
Show more [+] Less [-]Nutritional Minerals and Heavy Metals in Tea Infusions and Daily Intake of Human Body Full text
2019
Ayse Dilek Atasoy | Mehmet Irfan Yesilnacar | Ali Yildirim | Ahmet Ferit Atasoy
Nutritional Minerals and Heavy Metals in Tea Infusions and Daily Intake of Human Body Full text
2019
Ayse Dilek Atasoy | Mehmet Irfan Yesilnacar | Ali Yildirim | Ahmet Ferit Atasoy
Tea (Camellia sinensis) is one of the most popular nonalcoholic beverages in the world. During tea infusion, both essential mineral elements and toxic metals are extracted into the beverage. In oriental countries, almost a liter of tea is consumed daily by an average adult. Thus, high toxic elements in traditional teas can be of concern. Aim of the study was to determine the essential element contents and toxic heavy metal concentrations in tea products available on the market in Turkey and comparing the contents of infusion for Turkish and Ceylon black and green tea types. The associated health risk to tea drinkers were estimated with reference to Tolerable Daily Intake (TDI) Values from US EPA for adults and children. Among the essential elements in all of the black teas purchased from the market, K was present at the highest concentration followed by Mg, Ca and Al. Pb and Mn contents of several tea samples were found over the Tolerable Daily Intake levels.
Show more [+] Less [-]El desafío de las comunidades artesanales rurales: una propuesta ecotecnológica para una artesanía sostenible* Full text
2009
Pacheco Contreras, Juan Carlos(Pontificia Universidad Javeriana de Colombia Departamento de Diseño Facultad de Arquitectura y Diseño) | Gómez Vásquez, Gonzalo(Pontificia Universidad Javeriana de Colombia Departamento de Diseño Facultad de Arquitectura y Diseño) | Barrero Tapias, Gabriel(Pontificia Universidad Javeriana de Colombia Departamento de Diseño Facultad de Arquitectura y Diseño)
An eco-technological model was used to determine aspects of artisanal production in the rural communities of Galapa and Usiacurí, located in the Department of Atlántico, Colombia. Galapa produces wooden masks and Usiacurí, handcrafts made with the Iraca palm. Both communities are facing the challenges of globalization and the capacity of their artisans has been affected by market economy dynamics, which demand high levels of production and excessive use of natural resources. This has led to a rupture between material cultural patrimony, technological memory, and ecological balance of natural resources used. The model draws from qualitative data obtained through participatory instruments, which are then systematized in a structural analysis matrix to determine the impact and inter-dependency of the different aspects covered in the model. Based on the results obtained, a tool was designed for decision-making processes regarding the cultural, technological, and ecological productivity of handcraft production. | Bajo el enfoque del Modelo Ecotecnológico observado en las comunidades artesanales de Galapa y Usiacurí del Departamento de Atlántico; Colombia, se presentan las dimensiones que caracterizan lo artesanal. En ambas comunidades se elaboran máscaras en madera y artesanías en palma de iraca, respectivamente, las cuales han persistido a los retos de la globalización. Sin embargo, la capacidad de estos artesanos ha sido perturbada por la dinámica económica basada en el mercado, que les exige niveles de producción y utilización excesiva de recursos naturales, conduciéndolos a una ruptura entre el patrimonio cultural material, la memoria tecnológica y el balance ecológico de recursos naturales utilizados. El modelo se construye a partir de datos cualitativos obtenidos mediante instrumentos participativos sistematizados en una matriz de análisis estructural, para dar cuenta de las relaciones de incidencia y dependencia de las dimensiones del modelo. Los resultados se sintetizan en un instrumento que permite tomar decisiones sobre la productividad cultural, tecnológica y ecológica de la producción artesanal.
Show more [+] Less [-]Role of Different Cover Crops on DTPA-Extractable Micronutrients in an Apricot Orchard Full text
2019
Zeynep Demir | Nihat Tursun | Doğan Işık
This study was conducted to compare the effect of different cover crop treatments on DTPA-extractable micronutrients (Fe, Mn, Zn, Cu) and soil pH in an apricot orchard with clay texture located in Malatya province of Turkey. For this purpose, 5 different experimental groups (Vicia villosa Roth (VV), Vicia pannonica Crantz (VP), Vicia pannonica Crantz and Tritikale mixture (70% + 30%, respectively) (VPT), Phacelia tanacetifolia Benth (PT), Fagopyrum esculentum Moench (FE)) and 3 control groups (mechanically cultivated (MC), herbicide treatment (HC) and bare control plot (BC)) were used in the apricot orchards. The soils were sampled from 0–20 cm and 20-40 cm depths in each plot for soil analyses. According to the obtained results, while cover crop treatments reduced pH values of soils according to the bare control, the cover crops increased the Fe, Mn and Zn contents of soils in the 0-20 cm soil depth. The highest Ext-Fe, Mn and Zn contents were obtained in the VV (14.83mg kg-1, 8.42 mg kg-1, 1.03 mg kg-1, respectively) at the 0-20 cm soil depth. As compared to bare control, highest percent increases in Fe, Mn and Zn contents were determined in the VV 27.73%, 31.69% and 37.54%, respectively. The greatest significant negative correlations in the VV treatment were observed between pH and Fe (-0.985**), between pH and Mn (-0.945**) and between pH and Zn (-0.764*). The greatest significant negative correlations in the VP treatment were observed between pH and Fe (-0.948**), between pH and Mn (-0.928**) and between pH and Zn (-0.722*). It was concluded based on current findings that cover crops, especially Vicia villosa Roth and Vicia pannonica Crantz could be incorporated into cropping systems to improve micronutrients and to provide a sustainable soil management.
Show more [+] Less [-]İyileştirici Bahçeler ve Tasarım Kriterlerinin Değerlendirilmesi Full text
2019
Gülbin Çetinkale Demirkan
Var olduğu günden beri doğa ile etkileşim halinde olan insanoğlu doğadan farklı amaçlar için yararlanmaktadır. Eğlenmek, çeşitli aktivitelerde bulunmak, kendini iyi hissetmek için her zaman doğanın bir parçası olan yeşil alanlara ihtiyaç duyulmaktadır. Ancak insanlar; hızlı ve çarpık şehirleşme, sanayileşme ve teknoloji gibi faaliyetler sebebiyle azalan yeşil alanlarla artan kapalı mekanlarda yaşamlarını devam ettirmektedir. Kırsal alanlarda yaşayan insanların da artan kaygıları, onları şehirlere çekmeye başlamış, kentler giderek yoğunlaşmış, birçok kentte ihtiyacı karşılamak adına betonlar yükselmiş, yaşam kalitesi azalmış, doğa hiç bozulmayacakmış gibi tahrip edilmiş ve bugün birçok konut yeşil alansız, bahçesi olmadan inşa edilmiştir. Yeşile özlem duyan, doğadan uzaklaşan günümüz insanında depresyon ve buna bağlı olarak gelişen psikolojik bozukluklar görülmeye başlanmıştır. Doğa ve doğal alanların insanlar üzerindeki olumlu etkileri birçok bilim insanı tarafından da tespit edilmiştir. Son yıllarda, insan sağlığı üzerinde yapısal çevrenin etkileri dikkat çekmiş ve “iyileştirici bahçe” kavramı ortaya çıkmıştır. İyileştirici bahçeler peyzaj mimarlığı çalışmalarında da yeni bir hareket etkisi oluşturmuştur. Bu çalışmada; iyileştirici bahçelerin çeşitli sağlık problemleri olan hastalar üzerindeki etkilerinden bahsedilerek, tasarım ilkelerine göre değerlendirmesi yapılmıştır.
Show more [+] Less [-]Health Benefits of Ganoderma lucidum as a Medicinal Mushroom Full text
2019
Sanem Bulam | Nebahat Şule Üstün | Aysun Pekşen
Ganoderma lucidum (Curtis) P. Karst., known as “Lingzhi” in China or “Reishi” in Japan, is a well-known medicinal mushroom and traditional Chinese medicine, which has been used for the prevention and treatment of bronchitis, allergies, hepatitis, immunological disorders and cancer. G. lucidum is rarely collected from nature and mostly cultivated on wood logs and sawdust in plastic bags or bottles to meet the demands of international markets. Diverse groups of chemical compounds with pharmacological activities, isolated from the mycelia and fruiting bodies of G. lucidum are triterpenoids, polysaccharides (β-D-glucans), proteins, amino acids, nucleosides, alkaloids, steroids, lactones, lectins, fatty acids, and enzymes. The biologically active compounds as primarily triterpenoids and polysaccharides of G. lucidum have been reported to possess hepatoprotective, antihypertensive, hypocholesterolemic, antihistaminic effects and antioxidant, antitumor, immunomodulatory, and antiangiogenic activities. Several formulations have been developed, patented and used as nutraceuticals, nutriceuticals and pharmaceuticals from G. lucidum’s water or ethanol extracts and rarely purified active compounds. As the result of clinical trials, various products have commercially become available as syrup, injection, tablet, tincture or bolus of powdered medicine and an ingredient or additive in dark chocolate bars and organic fermented medicinal mushroom drink mixes such as green teas, coffees, and hot cacaos. This review has intended to give and discuss recent knowledge on phytochemical and pharmacological compositions, therapeutic and side effects, clinical trials, and commercial products of G. lucidum.
Show more [+] Less [-]Nutritional Content and Health Benefits of Eggplant Full text
2019
Muhammad Yasir Naeem | Senay Ugur
Vegetables supply various minerals, vitamins, dietary fibers along with important phytochemicals that plays a major contribution in our balance diets and nutrition. Each vegetable contain a unique amount of various nutrients that are strongly linked with the protection of different health diseases. Eggplant (Solanum melongena L.) is a nonwoody annual plant with purple to white flowers along with enlarged lobed leaves with bushy foliage that grows with maximum height of 120cm. Eggplant is mainly grown for vegetables and medicinal purposes. The phytochemical analysis of eggplant shows that it is the rich source of various essential compounds aspartic acid, tropane, flavonoids, lanosterol, gramisterol, steroid alkaloids, glycoalkaloids, histidine, nasunin, oxalic acid, solasodine, ascorbic acid and tryptophan that are present in fruits and leaves. It also contains low calories and high moisture contents. These compounds were found helpful in the cure of various diseases like cancer, anti-inflammatory, anti-asthmatic, anti-platelet hypo-lipidemic, and hypotensive etc. Today most modern scientific techniques are available to cure different various health problems but still majority of population across the globe depends upon the traditional herbal medicines and practices. This review mainly explains nutritional content, medicinal and health benefits of S. melongena
Show more [+] Less [-]Milk Production and Composition in Camel and Its Beneficial Uses: A Review Full text
2019
Wajid Ali | Ethem Akyol | Ayhan Ceyhan | Sadia Dilawar | Asia Firdous | Muhammad Zia ul Qasim | Muhammad Moiez Ahmad
Globally, 16.9% of milk used by humans is taken from different species other than a cow. These species are sheep, horse, yak, ass, goat, camel and buffalo. The global camel (Camelus dromedarius) population is about 34 million head with sharing of almost 0.4% of world’s non-cattle milk. Within the last 20 years, the curiosity of camel farming is amassed remarkably in different countries of the world including the Netherland, Italy and USA for camel milk production. The camel is considered as a goal animal of the 21st century because it produces high quality milk under extreme temperature, deficiency of pasture and dearth of water. The average milk production of camel fluctuates from 4 to 30 lt with lactation length ranges from 9 to18 months having peak yield in second to the third month of lactation. Camel’s milk is used globally because of its salty taste, high vitamin C concentration and its medicinal properties. Nevertheless, it gives many valuable benefits such as treatment of autism, control diabetes and allergy, prevention from liver cirrhosis and replacer of cow milk to avoid an infant’s allergic reaction. The camel milk is a natural treatment of diabetes as it has a substantial result in a decrease of mean blood glucose and conserves necessary insulin doses. Camel milk constitutes of protein (2.5-4.5%), fat (2.9-5.5%), solid not fat (8.9 -14.3%), ash (0.35-0.95%), lactose (2.9-5.8%) and water (86.3-88.5%) as mean specific gravity is 1.03. Due to its distinct properties, the consumption of camel milk is increasing day by day and a number of industries are working to promote camel milk production and processing. Therefore, the tenacity of this review article is to explicate the beneficial uses and production of camel milk over the globe.
Show more [+] Less [-]The Effect of Enteritis, Pneumonia and Omphalitis on Oxidative/Antioxidant Balance in the Calves Full text
2019
İbrahim Yurdakul | Ugur Aydogdu
In this study, it was aimed to determine the effects of enteritis, pneumonia and omphalitis on oxidative/antioxidant balance in the calves. In total, 27 calves with neonatal disease and 10 healthy calves (control) were used. The sick calves were divided into 3 groups according to localization of infection, omphalitis (n = 10), pneumonia (n = 8) and enteritis (n = 9). Blood samples of the calves were taken from jugular vein for analysis. Blood in tubes without anticoagulant was centrifuged at 5000 rpm for 5 min following clotting, and the sera were removed and stored at -80°C until analyzed. Serum malondialdehyde and nitric oxide levels of all groups were significantly higher, while glutathione, glutathione peroxidase, catalase and superoxide dismutase levels were significantly lower compared to the control group. As a conclusion, diarrhea, pneumonia and omphalitis are caused by oxidative damage in the calves, and antioxidant treatment may be beneficial in the treatment of these diseases.
Show more [+] Less [-]Free Radical Scavenging Activity and Biochemical characteristics of Ulva rigida (Ulvophyceae) and Arthrospira platensis (Cyanophyceae) Full text
2019
İlknur Ak | Gülen Türker
In this study, the antioxidant activities and biochemical characteristics of Ulva rigida (Ulvophyceae) and Arthrospira platensis (Cyanophyceae) were determined. The extracts from two seaweed species were evaluated for their free radical scavenging activity, using the 1,1-diphenyl-2-picrylhydrazyl hydrate (DPPH) method, their total phenolic, flavonoid, and condensed tannin contents, through Folin–Ciocalteu, Quettier-Deleu, and Price methods, respectively. The extracts of two seaweeds showed a low free radical scavenging capacity in comparison with commercial antioxidant BHT (butylated hydroxytoluene), and vitamin C. The extract of U. rigida demonstrated greater antioxidant potential with a low IC50 (3.76±0.02 mg/g Ext.). The total phenolic contents were ranged from 2.21±0.08 (U. rigida) to 8.59±0.62 (A. platensis) mg GAE/g of extract. The highest flavonoid content was found in A. platensis as 22.70±0.65 mg rutin/g of extract. The contents of condensed tannin were measured 3.01±0.11 mg CE/g of extract for A. platensis and 3.76±0.06 mg CE/g of extract for U. rigida. According to results obtained, U. rigida and A. maxima possess antioxidant activity and could be used in for future applications in medicine, functional foods, and agriculture.
Show more [+] Less [-]Antimikrobiyal Aktivitenin Belirlenmesinde Cross-Streak Metodu Kullanımı Full text
2019
Mustafa Ersal
Antimikrobiyal duyarlılık testleri, ilaçların keşfedilmesi, epidemiyoloji ve terapötik sonuçların tahmini için kullanılabilmektedir. Günümüzde mikrobiyal yaşamdaki dirençlilik artış göstermekte olduğu için antimikrobiyal bileşikler etkilerini kaybetmekte ve bu durum onları tehlikeye sokmaktadır. Ayrıca, antimikrobiyal ajanların etkileri, çoklu ilaca dirençli bakterilerle ilişkili tedavilerde başarısızlık göstermektedir. Bu durum, halk sağlığı için küresel bir endişe olma durumuna gelmiştir. Bu yüzden, yeni antimikrobiyal ajanların keşfedilmesi ve antimikrobiyal duyarlılık testlerinin yaygın olarak kullanılması ve geliştirilmesi gerekmektedir. Antimiktobiyal aktivitenin belirlenmesi için birçok teknik bulunmaktadır. Duyarlı mikroorganizmaları inhibe etmek amacıyla uygulanan bu tekniklerden çoğu, katı ya da yarı katı üretim ortamındaki difüzyon ile ilişkili metodlara dayalıdır. Bu teknikler arasında Cross-streak ise yeni antibiyotik keşfi için yapılan araştırmalarda kültürlerin nispeten hızlı bir şekilde taranmasını sağlayan kolay bir tekniktir. Fakat Cross-streak testinin en büyük dezavantajı, niceliksel verilerin elde edilmesindeki güçlüktür. Çünkü inhibisyon bölgesinin kenarları genellikle çok bulanık ve belirsizdir. Bazı antimikrobiyal duyarlılık test teknikleri, bu alandaki dikkat çekici adımlar belirlenerek Clinical Laboratory Standards Institute (CLSI) ve European Committee on Antimicrobial Susceptibility Testing (EUCAST) tarafından standardizasyona tabi tutulmuştur. Bu test prosedürü, spesifik test koşullarının ve metotlarının kullanımına gereksinim duymaktadır. Ayrıca, besiyeri ve inkübasyon koşulları ile zaman bu gereksinimler arasındadır. Hali hazırda kullanılan aktivite belirleme yöntemlerinden Cross-streak yönteminin iyi anlaşılıp geliştirilmesi önem arz etmektedir.
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