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E Y Choi, C K Kim
Nitrogen-doped nano-onions (NNO) were prepared as electrocatalytic materials for the oxygen reduction reaction (ORR). The nano-onions (NO), spherical graphitic material particles, were prepared by pyrolysis of nanodiamonds (ND). Oxidized NO (ONO) was prepared from NO by a modified Hummers' method, and this was mixed with urea, followed by pyrolysis, resulting in the formation of NNO. The nitrogen content and molar ratio of nitrogen-containing groups in the NNOs were varied by controlling the oxygen content of ONO to explore the effect of nitrogen content on the ORR activity...
June 23, 2017: Scientific Reports
Rong Li, Shan Xin, Chengcheng Tao, Xiang Jin, Hongbin Li
Ascorbate oxidase (AO) plays an important role in cell growth through the modulation of reduction/oxidation (redox) control of the apoplast. Here, a cotton (Gossypium hirsutum) apoplastic ascorbate oxidase gene (GhAO1) was obtained from fast elongating fiber tissues. GhAO1 belongs to the multicopper oxidase (MCO) family and includes a signal peptide and several transmembrane regions. Analyses of quantitative real-time polymerase chain reaction (QRT-PCR) and enzyme activity showed that GhAO1 was expressed abundantly in 15-day post-anthesis (dpa) wild-type (WT) fibers in comparison with fuzzless-lintless (fl) mutant ovules...
June 23, 2017: International Journal of Molecular Sciences
Jaqueline Moraes Bazioli, Luciana Da Silva Amaral, Taícia Pacheco Fill, Edson Rodrigues-Filho
Over the past few years Penicillium brasilianum has been isolated from many different environmental sources as soil isolates, plant endophytes and onion pathogen. All investigated strains share a great ability to produce bioactive secondary metabolites. Different authors have investigated this great capability and here we summarize the metabolic potential and the biological activities related to P. brasilianum's metabolites with diverse structures. They include secondary metabolites of an alkaloid nature, i...
June 20, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
Eva Ortner, Michael Granvogl
Glucosinolates are the most abundant secondary sulfur-containing plant metabolites in the plant family of Brassicaceae. These phytochemicals are well-known for their enzymatic degradation induced by the enzyme myrosinase resulting in pungent odor impressions derived from their respective degradation products. However, up to now, only little attention has been paid to non-enzymatic thermal degradation and the release of additional aroma-active compounds. Thermal treatment is particularly important in the processing of Brassica vegetables, and, thereby, glucosinolates as precursors can act as a natural source of odorants...
June 20, 2017: Journal of Agricultural and Food Chemistry
Soma Nag, Abhijit Mondal, Nirjhar Bar, Sudip Kumar Das
The use of sustainable, green and biodegradable natural wastes for Cr(VI) detoxification from the contaminated wastewater is considered as a challenging issue. The present research is aimed to assess the effectiveness of seven different natural biomaterials, such as jackfruit leaf, mango leaf, onion peel, garlic peel, bamboo leaf, acid treated rubber leaf and coconut shell powder, for Cr(VI) eradication from aqueous solution by biosorption process. Characterizations were conducted using SEM, BET and FTIR spectroscopy...
June 16, 2017: Environmental Science and Pollution Research International
Xiaolong Zhou, Xina Wang, Xi Feng, Kun Zhang, Xiaoniu Peng, Hanbin Wang, Chunlei Liu, Yibo Han, Hao Wang, Quan Li
Carbon dots (size <10 nm) have been conventionally decorated onto semiconductor matrix for photocatalytic H2 evolution, but the efficiency is largely limited by the low loading ratio of C dots on the photocatalyst. Here, we propose an inverse structure of Cd0.5Zn0.5S quantum dots (QDs) loaded onto onion-like carbon (OLC) matrix for noble metal-free photocatalytic H2 evolution. 6.9 nm-sized Cd0.5Zn0.5S QDs were uniformly distributed on 30 nm OLC with both up-converted and down-converted PL property. Such inverse structure allows full optimization of the QD-OLC interfaces for effective energy transfer and charge separation, both of which contribute to the efficient H2 generation...
June 16, 2017: ACS Applied Materials & Interfaces
Feiyue Ren, Kim Reilly, Joseph P Kerry, Michael Gaffney, Mohammad Hossain, Dilip K Rai
We carried out a 6-year study to assess the effect of conventional, organic, and mixed cultivation practices on bioactive compounds (flavonoids, anthocyanins) and antioxidant capacity in onion. Total flavonoids, total anthocyanins, individual flavonols, individual anthocyanins, and antioxidant activity were measured in two varieties ('Hyskin' and 'Red Baron') grown in a long-term split-plot factorial systems comparison trial. This is the first report of repeated measurements of bioactive content over an extensive time period in a single crop type within the same trial...
June 14, 2017: Journal of Agricultural and Food Chemistry
Sanjay K S Patel, Jung-Kul Lee, Vipin C Kalia
Biological hydrogen (H2) production from the biowastes is widely recognized as a suitable alternative approach to utilize low cost feed instead of costly individual sugars. In the present investigation, pure and mixed biowastes were fermented by defined sets of mixed cultures for hydrolysis and H2 production. Under batch conditions, up to 65, 67 and 70 L H2/kg total solids (2%, TS) were evolved from apple pomace (AP), onion peels (OP) and potato peels (PP) using a combination of hydrolytic mixed culture (MHC5) and mixed microbial cultures (MMC4 or MMC6), respectively...
June 2017: Indian Journal of Microbiology
Sergio Santos-Alarcón, Omar Francisco López-López, Miguel Ángel Flores-Terry, Dante Villamil-Cerda, Luis Jesús Allemant-Ortiz, Juan José Ríos-Martín, Victoria Alegría, Luis Requena
BACKGROUND: Collagen is the most abundant protein in the body and the main structural component of the skin. OBJECTIVE: To provide a review of the histopathology of collagen alterations and to propose a classification with the most important types of collagen anomalies in dermatopathology. The authors describe some of the main morphological clues of collagen anomalies for specific diagnosis of some cutaneous inflammatory and neoplastic conditions. METHODS: The authors review histopathologic collagen anomalies, concerning both morphology and disposition in some inflammatory and neoplastic cutaneous conditions, and they review previous terminology and proposed a classification of the most important types of collagen anomalies that can be seen in dermatopathological practice...
June 6, 2017: American Journal of Dermatopathology
Shigekuni Noba, Nana Yako, Minoru Kobayashi, Susumu Masuda, Tetsuya Watanabe
Onion-like off-flavor is a highly undesirable property in beer. Although several compounds that impart onion-like odors have been identified, the individual contribution of these compounds to the onion-like off-flavor in beer is not clear. In the present study, we searched for compounds that impart an onion-like odor by gas chromatography (GC)-olfactometry. The analysis of several types of beer revealed that 2-mercapto-3-methyl-1-butanol (2M3MB) and 3-mercapto-3-methyl-1-butanol (3M3MB) were possible causative compounds...
June 8, 2017: Journal of Bioscience and Bioengineering
Samereh Ranjbar Banforuzi, Mohammad Reza Hadjmohammadi
A new two-phase hollow fiber-liquid microextraction based on reverse micelle as sensitive and efficient method for the extraction of quercetin in human plasma, onion and tomato samples was developed for the first time. The extraction is based on the solubilization of analyte in the aqueous core of the reverse micelle of cationic cethyltrimethyl ammonium bromide surfactant, CTAB, which are present in the organic phase and are used as acceptor phase in hollow fiber-liquid phase microextraction. Experimental results show that the electrostatic interaction between the oppositely charged surfactant head group present in the reverse micelles and the analyte molecule has a key role in the extraction...
October 1, 2017: Talanta
Seetur R Pradeep, Krishnapura Srinivasan
BACKGROUND: Fenugreek (Trigonella foenum-graecum) seeds and onion (Allium cepa) are independently known to have antidiabetic effects through different mechanisms. The beeneficial influence of a combination of dietary fenugreek seeds and onion on hyperglycemia and its associated metabolic abnormalities were evaluated in streptozotocin-induced diabetic rats. METHODS: Diabetes was experimentally induced with streptozotocin and diabetic rats were fed with 10% fenugreek or 3% onion or their combination for 6 weeks...
May 24, 2017: Journal of Basic and Clinical Physiology and Pharmacology
Arash Mohammadzadeh, Abdolmajid Mahdavi Damghani, Javad Vafabakhsh, Reza Deihimfard
Efficient use of energy in farming systems is one of the most important implications for decreasing greenhouse gas (GHG) emissions and mitigating global warming (GW). This paper describes the energy use patterns, analyze the economics, and report global warming potential effects of major crop production systems in East Azerbaijan province, Iran. For this purpose, 110 farmers whose main activity was major crop production in the region, including wheat, barley, carrot, tomato, onion, potato, alfalfa, corn silage, canola, and saffron, were surveyed...
June 3, 2017: Environmental Science and Pollution Research International
Guoping Feng, Amanda Hew, Ramesh Manoharan, Siva Subramanian
Consistent deviations of the 3M Petrifilm aerobic counts (AC) from the standard pour plate aerobic plate count (APC) were observed with dehydrated onion and garlic products. A large study was designed to determine the relationship of these two methods and the root cause for the deviations. A total of 3,800 dehydrated onion and garlic samples were analyzed by both the Petrifilm AC and the standard pour plate APC method. Large spreader-like liquefied areas were observed on numerous Petrifilm plates. These liquefied areas made enumeration inaccurate...
June 2, 2017: Journal of Food Protection
Jiahao Yu, Shuqin Zhang, Lianfu Zhang
BACKGROUND: During vegetable cooking, one of the most notable and common chemical reaction is the Maillard reaction as a result of thermal treatment and dehydration. Amadori compound determination provides a very sensitive indicator for early detection of quality changes caused by the Maillard reaction as well as to retrospectively assess the heat treatment or storage conditions at which the product has been subjected. In this paper, a hydrophilic interaction liquid chromatography(HILIC)-ESI-MS/MS method was developed for the analysis of eight Amadori compounds and the initial steps of the Maillard reaction during cooking (steaming, frying and baking) bell pepper, red pepper, yellow onion, purple onion, tomato and carrot were also assessed by quantitative determination of these Amadori compounds...
June 2, 2017: Journal of the Science of Food and Agriculture
T Revathy, M A Jayasri, K Suthindhiran
Magnetosomes are nanosized iron oxide particles surrounded by lipid membrane synthesized by magnetotactic bacteria (MTB). Magnetosomes have been exploited for a broad range of biomedical and biotechnological applications. Due to their enormous potential in the biomedical field, its safety assessment is necessary. Detailed research on the toxicity of the magnetosomes was not studied so far. This study focuses on the toxicity assessment of magnetosomes in various models such as Human RBC's, WBC's, mouse macrophage cell line (J774), Onion root tip and fish (Oreochromis mossambicus)...
June 2017: 3 Biotech
David M Okuji
No abstract text is available yet for this article.
January 2017: Contemporary Clinical Dentistry
Xiao-Yan Tang, Wen-Da Huang, Jing-Jing Guo, Yang Yang, Ran Tao, Xu Feng
Fe-impregnated biochar was assessed as a method to remove the pesticide pollutant chlorpyrifos, utilizing biochar/FeOx composite synthesized via chemical coprecipitation of Fe(3+)/Fe(2+) onto Cyperus alternifolius biochar. Fe-impregnated biochar exhibited a higher sorption capacity than pristine biochar, resulting in more efficient removal of chlorpyrifos from water. Soil was dosed with pristine or Fe-impregnated biochar at 0.1 or 1.0% w/w, to evaluate chlorpyrifos uptake in Allium fistulosum L. (Welsh onion)...
June 21, 2017: Journal of Agricultural and Food Chemistry
Danielle Grolman, Diya Bandyopadhyay, Abdullah Al-Enizi, Ahmed Elzatahry, Alamgir Karim
Synthetic topographically patterned films and coatings are typically contoured on one side, yet many of nature's surfaces have distinct textures on different surfaces of the same object. Common examples are the top and bottom sides of the butterfly wing or lotus leaf, onion shells, and the inside versus outside of the stem of a flower. Inspired by nature, we create dual (top and bottom) channel patterned polymer films. To this end, we first develop a novel fabrication method to create ceramic line channel relief structures by converting the oligomeric residue of stamped poly(dimethylsiloxane) (PDMS) nanopatterns on silicon substrates to glass (SiOx, silica) by ultraviolet-ozone (UVO) exposure...
June 21, 2017: ACS Applied Materials & Interfaces
Jia Wang, Wenjie Jin, Xiangru Wu
Metanephric stromal tumor (MST) of the kidney, a rare benign pediatric neoplasm recognized for less than 20 years, is not widely known. The authors describe a case of MST with rare squamous epithelium in a 14-month-old female. A renal mass was discovered during her fetal period. After her birth, computerized tomography revealed that the mass was localized in the inferior pole of her left kidney. She then underwent nephrectomy. The tumor was an unencapsulated but well-defined mass with a white, solid and firm cut surface and had dimensions of 4cm×3...
March 21, 2017: Pathology, Research and Practice
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