Read by QxMD icon Read


Behrooz Alizadeh Behbahani, Fakhri Shahidi, Farideh Tabatabaei Yazdi, Seyed Ali Mortazavi, Mohebbat Mohebbi
In this study, Plantago major seed mucilage (PMSM) was extracted from whole seeds using hot-water extraction (HWE). The dill (D) essential oil components were identified through gas chromatography (GC) and gas chromatography/mass spectrometry (GC/MS) and its antioxidant properties were examined through the methods of 2,2-diphenyl-1-picrylhydrazyl (DPPH), ferric reducing antioxidant potential (FRAP) and ß-carotene-linoleic acid assay (B-CL). Total phenolic content (TPC) was characterized through the Folin-Ciocalteu method and the antimicrobial effect was evaluated on 10 pathogenic microorganisms...
October 19, 2016: International Journal of Biological Macromolecules
Parveen Kumari, B S Khatkar
Phenolic content, antioxidant activities and antimicrobial activities of methanolic, ethanolic and ethyl acetate extracts of five different varieties of aonla (Emblica officinalis) fruits as well their powders were evaluated. Total polyphenolic content in fresh aonla fruit extracts varied from 70.6 to 159.4 mg GAE/g and their EC 50 (effective concentration) values for antioxidant activity ranged from 46.72 to 359.7 µg/ml. Significant varietal difference were observed in antioxidant activity of the extracts of fresh aonla fruit and powder...
July 2016: Journal of Food Science and Technology
Li Shing Teoh, Ola Lasekan, Noranizan Mohd Adzahan, Norhashila Hashim
In this work, potato slices were exposed to different doses of UV-C irradiation (i.e. 2.28, 6.84, 11.41, and 13.68 kJ m(-2)) with or without pretreatment [i.e. ascorbic acid and calcium chloride (AACCl) dip] and stored at 4 ± 1 °C. Changes in enzymatic activities of polyphenol oxidase (PPO), peroxidase (POD) and phenylalanine ammonia lyase (PAL), as well as total phenolic content (TPC) were investigated after 0, 3, 7 and 10 days of storage. Results showed that untreated and UV-C treated potato slices at 13...
July 2016: Journal of Food Science and Technology
Nurul Izzati Osman, Norrizah Jaafar Sidik, Asmah Awal, Nurul Athirah Mohamad Adam, Nur Inani Rezali
AIM: This study was conducted to evaluate the in vitro anti-inflammatory activities and total phenolic content (TPC) of methanolic extracts of infloresence axes, endosperms, leaves, and pericarps of Barringtonia racemosa L. METHODS: The anti-inflammatory study was conducted by assessing the potential through xanthine oxidase (XO) and albumin denaturation inhibition assays. Meanwhile, the TPC in the extracts were assessed by Folin-Ciocalteu assay. RESULTS: In the XO inhibition assay, the infloresence axes extract was found to exert the highest inhibition capacity at 0...
September 2016: Journal of Intercultural Ethnopharmacology
Thazin Thin, Lin Myat, Gi-Hyung Ryu
The effects of CO2 injection and barrel temperatures on the physiochemical and antioxidant properties of extruded cereals (sorghum, barley, oats, and millet) were studied. Extrusion was carried out using a twin-screw extruder at different barrel temperatures (80, 110, and 140°C), CO2 injection (0 and 500 mL/min), screw speed of 200 rpm, and moisture content of 25%. Extrusion significantly increased the total flavonoid content (TFC) of extruded oats, and β-glucan and protein digestibility (PD) of extruded barley and oats...
September 2016: Preventive Nutrition and Food Science
Rebecca Krochmal, Chakravarthy Reddy, Lonny Yarmus, Neeraj R Desai, David Feller-Kopman, Hans J Lee
BACKGROUND: Malignant pleural effusions (MPEs) represent advanced stage disease with potentially significant patient discomfort due to dyspnea. Palliative management options include repetitive thoracenteses, placement of a tunneled pleural catheter (TPC), chemical pleurodesis, or some combination of these procedures. The rapid pleurodesis procedure combines thoracoscopic talc pleurodesis and insertion of a TPC at the same time with the goals of reducing both the length of hospitalization and the duration of catheter use...
September 2016: Journal of Thoracic Disease
Milica Pantelić, Dragana Dabić Zagorac, Maja Natić, Uroš Gašić, Sonja Jović, Dragan Vujović, Jelena Popović Djordjević
In this study, grapes and corresponding wines of Merlot /No 022, 025 and 029/ and Cabernet Franc /No 02, 010 and 012/ clones (recently developed) were evaluated regarding the total phenolic content, total anthocyanin content, and radical scavenging activity, aiming to better understand their quality and market potential. The nineteen individual polyphenols were quantified in studied grape samples using UHPLC coupled to a triple-quadrupole mass spectrometer. The mother grapes and wines were used as the relevant standards...
2016: PloS One
Daniel Załuski, Helena D Smolarz
The chemical composition and pharmacological activity of E. senticosus cultivated in Poland were investigated. Studies included the assay of TPC and TFC, 2D-TLC identification of phenolic acids, HPTLC-detection of antioxidants, and antioxidative, antileukemic, anti-MMPs properties of E. senticosus. The ethanolic extracts from the roots, spring leaves, fruits, and the chloroform extract from the roots were tested. The richest in polyphenols are the fresh fruits (57.5 mg/g), while in flavonoids the spring leaves (27...
September 2016: Pakistan Journal of Pharmaceutical Sciences
Susete Pinteus, Joana Silva, Celso Alves, André Horta, Nádia Fino, Ana Inês Rodrigues, Susana Mendes, Rui Pedrosa
Screening of antioxidant potential of dichloromethane and methanolic extracts of twenty-seven seaweeds from the Peniche coast was performed by: total phenolic contents (TPC), 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging activity and oxygen radical absorbance capacity (ORAC). Seaweeds revealing the highest antioxidant activity were screened for cytoprotective potential in MCF-7 cells, including the mitochondrial membrane potential analysis and the caspase-9 activity. High correlation was found between TPC of seaweed extracts and their scavenging capacity on DPPH and peroxyl radicals...
March 1, 2017: Food Chemistry
Siqi Wu, Jing Li, Quanxi Wang, Hui Cao, Jianguo Cao, Jianbo Xiao
Stenoloma chusanum is a traditional Chinese medicinal herb with a very high total flavonoid content (TFC). The seasonal dynamics of the TFC and total phenolic content (TPC) in S. chusanum, as well as antioxidant activity, were investigated. The TFC and TPC showed clear seasonal dynamics, reaching their maxima (24.63 ± 1.34% and 9.58 ± 0.41%, respectively) in February. The TFC and TPC in the aerial parts of the plant were much higher than those in the subterranean parts; however, the antioxidant activities of the extracts from the subterranean parts were slightly higher than those from the aerial parts...
October 4, 2016: Food and Chemical Toxicology
Shubin Hong, Shuang Yu, Jin Li, Yali Yin, Yujie Liu, Quan Zhang, Hongyu Guan, Yanbing Li, Haipeng Xiao
BACKGROUND: MicroRNAs (miRNAs) are endogenous, small non-coding RNAs that play important roles in multiple biological processes. MiR-20b has been reported to be dysregulated in papillary thyroid carcinoma (PTC). However, the functional roles are still largely unknown. This study aimed to investigate the biological functions and the underlying molecular mechanisms of miR-20b in PTC. METHOD: The expression of miR-20b was assessed by quantitative RT-PCR in 47 pairs of PTC and adjacent normal thyroid tissues...
October 7, 2016: Thyroid: Official Journal of the American Thyroid Association
D So, S Pradhan, G Konstantatos
Colloidal copper indium sulfide (CIS) nanocrystals (NCs) are Pb- and Cd-free alternatives for use as absorbers in quantum dot solar cells. In a heterojunction with TiO2, non-annealed ligand-exchanged CIS NCs form solar cells yielding a meager power conversion efficiency (PCE) of 0.15%, with photocurrents plummeting far below predicted values from absorption. Decreasing the amount of zinc during post-treatment leads to improved mobility but marginal improvement in device performance (PCE = 0.30%). By incorporating CIS into a porous TiO2 network, we saw an overall drastic improvement in device performance, reaching a PCE of 1...
September 22, 2016: Nanoscale
Varinder Singh, Baldev Singh, Ashutosh Sharma, Kulwinder Kaur, Ajai Prakash Gupta, Raj Kumar Salar, Vipin Hallan, Pratap Kumar Pati
AIMS: The present work investigates the implication of leaf spot disease on the antioxidant potentials and commercial value of pharmaceutically important constituents of Withania somnifera, a high valued medicinal plant. METHODS AND RESULTS: Leaf spot disease was induced in W. somnifera by inoculating Alternaria alternata (Fr.) Keiss. pathogen. Total polyphenolic content (TPC) and antioxidant potential showed a significant decrease during leaf spot disease. Evaluation of pharmaceutically active constituents withaferin A, withanone and withanolide A utilizing high-performance liquid chromatography (HPLC) showed a significant decrease in diseased samples as compared to healthy ones...
October 6, 2016: Journal of Applied Microbiology
Xianglin Zhai, Neepa Malsi Kumari Kuruppu Arachchige, Pedro Derosa, Jayne C Garno
The conductive properties of nanodots of model porphyrins were investigated using conductive-probe atomic force microscopy (CP-AFM). Porphyrins provide excellent models for preparing surface structures that can potentially be used as building blocks for devices. The conjugated, planar structure of porphyrins offers opportunities for tailoring the electronic properties. Two model porphyrins were selected for studies, 5,10,15,20-tetraphenyl-21H,23H-porphine cobalt(II) (TPC) and its metal-free analog 5,10,15,20-tetraphenyl-21H,23H-porphine (TPP)...
September 17, 2016: Journal of Colloid and Interface Science
Eleni Kollia, Panagiota Markaki, Panagiotis Zoumpoulakis, Charalampos Proestos
Extracts of different parts (heads, bracts and stems) of Cynara cardunculus L. (cardoon) and Cynara scolymus L. (globe artichoke), obtained by two different extraction techniques (Ultrasound-Assisted Extraction (UAE) and classical extraction (CE)) were examined and compared for their total phenolic content (TPC) and their antioxidant activity. Moreover, infusions of the plant's parts were also analysed and compared to aforementioned samples. Results showed that cardoon's heads extract (obtained by Ultrasound-Assisted Extraction) displayed the highest TPC values (1...
August 11, 2016: Natural Product Research
Ali Ghasemzadeh, Hawa Z E Jaafar, Asmah Rahmat
BACKGROUND: Herbal materials should be stored at optimal conditions in order to retain their nutritional quality. Proper storage has a significant impact on the quality of the herbs and spices. METHODS: The effects of storage temperature (5 and 15 °C) and time (4 and 8 months) on the phytochemical constituents associated with the antioxidant and antibacterial activities of ginger varieties (Halia bentong and Halia bara) were evaluated to determine the optimal storage conditions for ginger rhizomes...
September 29, 2016: BMC Complementary and Alternative Medicine
Selim Demir, Ibrahim Turan, Yuksel Aliyazicioglu
PURPOSE: The genus Rhododendron is distributed entirely in the world with the exception of South and Central America and Africa, growing in a large diversity of climatic conditions. This genus is a rich source of phenolic compounds, especially flavonoids, essential oils, chromones, terpenoids, and steroids. It has many biological properties such as antioxidant, anti-inflammatory, antiviral, antibacterial, anticancer, antidiabetic, immunomodulatory, cardioprotective and hepatoprotective among others due to their polyphenolic constituents...
July 2016: Journal of B.U.ON.: Official Journal of the Balkan Union of Oncology
N Inoue, C Farfan, G F Gonzales
Lepidium meyenii, known as maca, is a popular nutraceutical food which is grown over 4,000 m above sea level in the Peruvian central highlands. Maca contains alkaloids, but there are no studies on their biological effects. The butanol fraction obtained from methanol extract of maca hypocotyls contains alkaloids. The effects of butanol/aqueous fractions partitioned from methanol extract of yellow and black maca were examined. Total phenolic content (TPC) and antioxidant capacity by 2,2'-diphenyl-1-picrylhydrazyl were used to evaluate maca fractions in vitro...
October 2016: Andrologia
Karel Dieguez-Santana, Hai Pham-The, Pedro J Villegas-Aguilar, Huong Le-Thi-Thu, Juan A Castillo-Garit, Gerardo M Casañola-Martin
In this article, the modeling of inhibitory grown activity against Tetrahymena pyriformis is described. The 0-2D Dragon descriptors based on structural aspects to gain some knowledge of factors influencing aquatic toxicity are mainly used. Besides, it is done by some enlarged data of phenol derivatives described for the first time and composed of 358 chemicals. It overcomes the previous datasets with about one hundred compounds. Moreover, the results of the model evaluation by the parameters in the training, prediction and validation give adequate results comparable with those of the previous works...
December 2016: Chemosphere
Sanja Ž Mudrić, Uroš M Gašić, Aleksandra M Dramićanin, Ivanka Ž Ćirić, Dušanka M Milojković-Opsenica, Jelena B Popović-Đorđević, Nebojša M Momirović, Živoslav Lj Tešić
Spice peppers (Capsicum annuum L.) var. Lemeška and Lakošnička paprika were investigated to evaluate their polyphenolic and carbohydrate profiles and antioxidant activity. A total of forty-nine polyphenolics were identified using ultrahigh-performance liquid chromatography (UHPLC) coupled to LTQ OrbiTrap mass analyzer. Twenty-five of them were quantified using available standards, while the other compounds were confirmed by exact mass search of their deprotonated molecule [M-H](-) and its MS(4) fragmentation...
February 15, 2017: Food Chemistry
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"