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https://www.readbyqxmd.com/read/28102029/biochemical-markers-to-predict-internal-browning-disorders-in-rocha-pear-during-storage-under-high-co2
#1
Teresa Deuchande, Christian Larrigaudière, Umbelina Guterres, Susana M P Carvalho, Marta W Vasconcelos
BACKGROUND: The aim of this study was to identify biochemical markers to predict internal browning disorders (IBD) in 'Rocha' pear. Fruit from five orchards were stored for 45 days under cold air followed by 100 days in browning inducing controlled atmosphere (CA) conditions (1 kPa O2 + 10 kPa CO2 ). RESULTS: Relationships between concentrations of ethanol (EtOH), acetaldehyde (AcDH), ascorbic acid (AA) and the activities of peroxidase (POX) and polyphenoloxidase (PPO) and IBD incidence were established...
January 19, 2017: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/28101553/nucleophilic-ring-opening-reactions-of-trans-2-aroyl-3-aryl-cyclopropane-1-1-dicarboxylates-with-hydrazines
#2
Gopal Sathishkannan, V John Tamilarasan, Kannupal Srinivasan
trans-2-Aroyl-3-aryl-cyclopropane-1,1-dicarboxylates when treated with arylhydrazines in refluxing EtOH gave dihydropyrazoles, whereas with hydrazines in refluxing AcOH, they formed cyclopropane-fused pyridazinones. Although in both cases the corresponding hydrazones are formed initially, the former case involves a subsequent 5-exo-tet nucleophilic ring-opening, and the later, a 6-exo-trig nucleophilic attack by the other hydrazone nitrogen. The products are obtained in moderate to excellent yields with complete regio-and diastereoselectivity...
January 19, 2017: Organic & Biomolecular Chemistry
https://www.readbyqxmd.com/read/28088358/the-peroxisome-proliferator-activated-receptor-alpha-agonist-fenofibrate-attenuates-alcohol-self-administration-in-rats
#3
Colin N Haile, Therese A Kosten
Fibrates are a class of medications used to treat hypercholesterolemia and dyslipidemia that target nuclear peroxisome proliferator-activated receptors (PPARs). Studies have shown the PPARα agonist fenofibrate decreases voluntary EtOH consumption however its impact on the reinforcing and motivational effects of EtOH is unknown. We evaluated the ability of fenofibrate (25, 50 and 100 mg/kg), to alter EtOH (10%, w/v) and sucrose (2%, w/v) operant self-administration in rats under a FR2 schedule of reinforcement over four days and under a progressive ratio (PR) schedule on day five of treatment...
January 11, 2017: Neuropharmacology
https://www.readbyqxmd.com/read/28081301/ethanol-induces-platelet-apoptosis
#4
Lei Liu, Mengxing Chen, Lili Zhao, Qing Zhao, Renping Hu, Jie Zhu, Rong Yan, Kesheng Dai
BACKGROUND: Alcohol abuse incurs severe medical conditions, such as thrombocytopenia and hemorrhage, but the pathogenesis is not totally understood. Alcohol has been reported to induce apoptosis in eukaryotic cells, such as hepatocyte, nerve cell, corneal fibroblasts. However, it is still unclear whether alcohol induces platelet apoptosis. METHODS: Washed human platelets were pretreated with ethanol (EtOH), and apoptotic events and platelet function were detected...
January 12, 2017: Alcoholism, Clinical and Experimental Research
https://www.readbyqxmd.com/read/28078247/effects-of-biebersteinia-multifida-hydro-ethanol-extract-on-proliferation-and-apoptosis-of-human-prostate-cancer-and-human-embryonic-kidney-cells
#5
Alireza Golshan, Samira Hassanzadeh, Maryam Mojdekanloo, Zahra Tayarani-Najaran
OBJECTIVE: Biebersteinia (Geraniaceae) has a history of use in traditional medicine in some countries including Iran. In the present study, cytotoxic and apoptogenic properties of hydro-ethanol extract of B. multifidi was investigated on human prostate cancer cell lines (PC3 and DU 145) and human embryonic kidney 293 (HEK293) cells. MATERIALS AND METHODS: Cells were cultured in RPMI-1640 medium supplemented with 10% FBS at 37ºC in a humidified atmosphere of 95% air and 5% CO2...
November 2016: Avicenna Journal of Phytomedicine
https://www.readbyqxmd.com/read/28069216/ultrasonic-assisted-deacetylation-of-cellulose-acetate-nanofibers-a-rapid-method-to-produce-cellulose-nanofibers
#6
Farooq Ahmed, Alvira Ayoub Arbab, Abdul Wahab Jatoi, Muzamil Khatri, Najma Memon, Zeeshan Khatri, Ick Soo Kim
Herein we report a rapid method for deacetylation of cellulose acetate (CA) nanofibers in order to produce cellulose nanofibers using ultrasonic energy. The CA nanofibers were fabricated via electrospinning thereby treated with NaOH and NaOH/EtOH solutions at various pH levels for 30, 60 and 90min assisted by ultrasonic energy. The nanofiber webs were optimized by degree of deacetylation (DD%) and wicking behavior. The resultant nanofibers were further characterized by FTIR, SEM, WAXD, DSC analysis. The DD% and FTIR results confirmed a complete conversion of CA nanofibers to cellulose nanofibers within 1h with substantial increase of wicking height...
May 2017: Ultrasonics Sonochemistry
https://www.readbyqxmd.com/read/28068457/cellular-gabaergic-neuroactive-steroid-3%C3%AE-5%C3%AE-3-hydroxy-pregnan-20-one-3%C3%AE-5%C3%AE-thp-immunostaining-levels-are-increased-in-the-ventral-tegmental-area-of-human-alcohol-use-disorder-patients-a-postmortem-study
#7
Ahmet Sait Hasirci, Antoniette M Maldonado-Devincci, Matthew C Beattie, Todd K O'Buckley, A Leslie Morrow
BACKGROUND: The GABAergic neuroactive steroid (3α,5α)-3-hydroxy-pregnan-20-one (3α,5α-THP; allopregnanolone) enhances GABAergic activity and produces subjective effects similar to ethanol (EtOH). The effect of chronic alcohol exposure on 3α,5α-THP concentrations has been studied in mouse, rat, and monkey limbic brain areas. Chronic EtOH exposure produced divergent brain region and cell-specific changes in 3α,5α-THP concentrations in animal studies. However, 3α,5α-THP levels in similar human brain regions have never been examined in individuals diagnosed with alcohol use disorder (AUD)...
January 9, 2017: Alcoholism, Clinical and Experimental Research
https://www.readbyqxmd.com/read/28067838/effect-of-phenolic-compounds-from-elderflowers-on-glucose-and-fatty-acid-uptake-in-human-myotubes-and-hepg2-cells
#8
Giang Thanh Thi Ho, Eili Tranheim Kase, Helle Wangensteen, Hilde Barsett
Type 2 diabetes (T2D) is manifested by progressive metabolic impairments in tissues such as skeletal muscle and liver, and these tissues become less responsive to insulin, leading to hyperglycemia. In the present study, stimulation of glucose and oleic acid uptake by elderflower extracts, constituents and metabolites were tested in vitro using the HepG2 hepatocellular liver carcinoma cell line and human skeletal muscle cells. Among the crude extracts, the 96% EtOH extract showed the highest increase in glucose and oleic acid uptake in human skeletal muscle cells and HepG2-cells...
January 6, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28063777/observation-of-the-side-chain-o-methylation-of-glutamic-acid-or-aspartic-acid-containing-model-peptides-by-electrospray-ionization-mass-spectrometry
#9
A Emin Atik, Melda Z Guray, Talat Yalcin
O-methylation of the side chains of glutamic acid (E) and aspartic acid (D) residues is generally observed modification when an acidified methanol/water (MeOH/dH2O) mixture is used as a solvent system during sample preparation for proteomic research. This chemical modification may result misidentification with endogenous protein methylation; therefore, a special care should be taken during sample handling prior to mass spectrometric analysis. In the current study, we systematically examined the extent of E/D methylation and C-terminus carboxyl group of synthetic model peptides in terms of different incubation temperatures, storage times, and added acid types as well as its percentages...
January 2, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/28059410/enhanced-electrooxidation-of-glucose-at-nano-chitosan-niooh-modified-gc-electrode-fuel-blends-and-hydrocarbon-impurities
#10
Gumaa A El-Nagar, Christina Roth
The current study addresses, for the first time, the promoting effect of some selected fuel blending components, such as methanol (MeOH), ethanol (EtOH) and acetaldehyde (ACTA), on the glucose electrooxidation at a nano-chitosan-NiOOH modified GC electrode (nano-CS-NiOOH/GC). Blending glucose with different molar ratios of MeOH, EtOH and ACTA results in a significant enhancement in the fuel utilization, NiOOH oxidation capacity and turnover number of oxidized glucose molecules compared to the pure fuels. For instance, the use of glucose fuel blends composed of 40% of glucose with 60% of either MeOH, EtOH and ACTA results in 10, 8 and 5 times higher glucose activity of the nano-CS-NiOOH/GC electrode compared to using glucose as a pure fuel, respectively...
January 18, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28057167/moderate-dose-regular-lifelong-alcohol-intake-changes-the-intestinal-flora-protects-against-aging-and-keeps-spatial-memory-in-the-senescence-accelerated-mouse-prone-8-samp8-model
#11
Chikako Shimizu, Yasuhiro Oki, Yutaka Mitani, Youichi Tsuchiya, Toshitaka Nabeshima
PURPOSE: Heavy and long-term alcohol consumption increase the risk of alcohol-related diseases. Epidemiological studies show moderate drinking reduces the risk of mortality, cardiovascular diseases, and brain infarction in the J-shaped or U-shaped curve effect. However, why moderate drinkers may be healthy and non-drinkers may be ill in diverse populations remains controversial. Herein, we examined the relationship between moderate/lifelong alcohol intake and aging, especially aging-related cognitive functions in senescence-accelerated mouse prone 8 (SAMP8) model...
October 2016: Journal of Pharmacy & Pharmaceutical Sciences: a Publication of the Canadian Society for Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28047031/th-ef-207a-06-high-resolution-optical-ct-ect-imaging-of-unstained-mice-femur-brain-spleen-and-tumor
#12
S Yoon, M Boss, S Birer, M Dewhirst, M Oldham
PURPOSE: Optical transmission and emission computed tomography (optical-CT/ECT) provides high-resolution 3D attenuation and emission maps in unsectioned large (∼1cm(3) ) ex vivo tissue samples at a resolution of 12.9µm(3) per voxel. Here we apply optical-CT/ECT to investigate high-resolution structure and auto-fluorescence in a range of optically cleared mice organs, including, for the first time, mouse bone (femur), opening the potential for study of bone metastasis and bone-mediated immune response...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28045462/hippocampal-encoding-of-interoceptive-context-during-fear-conditioning
#13
S-W Yoo, M Bae, L B Tovar-Y-Romo, N J Haughey
Rodent models of auditory fear conditioning are often used to understand the molecular mechanisms regulating fear- and anxiety-related behaviors. Conditioning and extinction memories are influenced by contextual cues, and the reinstatement of conditioned fear occurs when the conditioning stimulus is presented in a context different from the extinction context. Although it has been proposed that internal state is a feature of context that could influence extinction, contributions of interoception to conditioning have not been experimentally addressed...
January 3, 2017: Translational Psychiatry
https://www.readbyqxmd.com/read/28045257/guest-programmable-multi-step-spin-crossover-in-a-porous-2-d-hofmann-type-material
#14
Michael J Murphy, Katrina A Zenere, Florence Ragon, Peter David Southon, Cameron John Kepert, Suzanne M Neville
The spin crossover (SCO) phenomenon defines an elegant class of switchable materials that can show cooperative transitions when long-range elastic interactions are present. Such materials can show multi-stepped transitions, targeted both fundamentally and for expanded data storage applications, when antagonistic interactions (i.e., competing ferro- and antiferro-elastic interactions) drive concerted lattice distortions. To this end, a new SCO framework scaffold, [FeII(bztrz)2(PdII(CN)4)]·n(guest) (bztrz = (E)-1-phenyl-N-(1,2,4-triazol-4-yl)methanimine, 1·n(guest)), has been prepared that supports a variety of antagonistic solid state interactions alongside a distinct dual guest pore system...
January 3, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28045235/serosal-and-muscular-layers-incision-technique-in-laparoscopic-surgery-for-gastric-gastrointestinal-stromal-tumors
#15
Hajime Fujishima, Tsuyoshi Etoh, Takahiro Hiratsuka, Tomonori Akagi, Masaaki Tajima, Tomotaka Shibata, Yoshitake Ueda, Manabu Tojigamori, Hidefumi Shiroshita, Norio Shiraishi, Seigo Kitano, Masafumi Inomata
INTRODUCTION: To minimize the resection of stomach tissue, especially for lesions close to the esophagogastric junction or pyloric ring, we developed laparoscopic wedge resection with the serosal and muscular layers incision technique (SAMIT) for gastric gastrointestinal stromal tumors. MATERIALS AND SURGICAL TECHNIQUE: SAMIT involves resection of the mucosal and submucosal layers and then an incision in serosal and muscular layers around the tumor. SAMIT is simple and does not require special devices...
February 2017: Asian Journal of Endoscopic Surgery
https://www.readbyqxmd.com/read/28032633/estrogen-receptors-%C3%AE-and-%C3%AE-play-major-roles-in-ethanol-evoked-myocardial-oxidative-stress-and-dysfunction-in-conscious-ovariectomized-rats
#16
Fanrong Yao, Abdel A Abdel-Rahman
BACKGROUND: We documented the dependence of ethanol (EtOH)-evoked myocardial dysfunction on estrogen (E2 ), and our recent estrogen receptor (ER) blockade study, in proestrus rats, implicated ERα signaling in this phenomenon. However, a limitation of selective pharmacological loss-of-function approach is the potential contribution of the other 2 ERs to the observed effects because crosstalk exists between the 3 ERs. Here, we adopted a "regain"-of-function approach (using selective ER subtype agonists) to identify the ER subtype(s) required for unraveling the E2 -dependent myocardial oxidative stress/dysfunction caused by EtOH in conscious ovariectomized (OVX) rats...
December 29, 2016: Alcoholism, Clinical and Experimental Research
https://www.readbyqxmd.com/read/28029796/identification-of-neuroprotective-spoxazomicin-and-oxachelin-glycosides-via-chemoenzymatic-glycosyl-scanning
#17
Jianjun Zhang, Ryan R Hughes, Meredith A Saunders, Sherif I Elshahawi, Larissa V Ponomareva, Yinan Zhang, Sydney R Winchester, Samantha A Scott, Manjula Sunkara, Andrew J Morris, Mark A Prendergast, Khaled A Shaaban, Jon S Thorson
The assessment of glycosyl-scanning to expand the molecular and functional diversity of metabolites from the underground coal mine fire-associated Streptomyces sp. RM-14-6 is reported. Using the engineered glycosyltransferase OleD Loki and a 2-chloro-4-nitrophenylglycoside-based screen, six metabolites were identified as substrates of OleD Loki, from which 12 corresponding metabolite glycosides were produced and characterized. This study highlights the first application of the 2-chloro-4-nitrophenylglycoside-based screen toward an unbiased set of unique microbial natural products and the first reported application of the 2-chloro-4-nitrophenylglycoside-based transglycosylation reaction for the corresponding preparative synthesis of target glycosides...
December 28, 2016: Journal of Natural Products
https://www.readbyqxmd.com/read/28029795/spoxazomicin-d-and-oxachelin-c-potent-neuroprotective-carboxamides-from-the-appalachian-coal-fire-associated-isolate-streptomyces-sp-rm-14-6
#18
Khaled A Shaaban, Meredith A Saunders, Yinan Zhang, Tuan Tran, Sherif I Elshahawi, Larissa V Ponomareva, Xiachang Wang, Jianjun Zhang, Gregory C Copley, Manjula Sunkara, Madan K Kharel, Andrew J Morris, James C Hower, Matthew S Tremblay, Mark A Prendergast, Jon S Thorson
The isolation and structure elucidation of six new bacterial metabolites [spoxazomicin D (2), oxachelins B and C (4, 5), and carboxamides 6-8] and 11 previously reported bacterial metabolites (1, 3, 9-12a, and 14-18) from Streptomyces sp. RM-14-6 is reported. Structures were elucidated on the basis of comprehensive 1D and 2D NMR and mass spectrometry data analysis, along with direct comparison to synthetic standards for 2, 11, and 12a,b. Complete 2D NMR assignments for the known metabolites lenoremycin (9) and lenoremycin sodium salt (10) were also provided for the first time...
December 28, 2016: Journal of Natural Products
https://www.readbyqxmd.com/read/28027824/protective-effect-of-chamomile-matricaria-recutita-l-decoction-extract-against-alcohol-induced-injury-in-rat-gastric-mucosa
#19
Mohamed-Amine Jabri, Nadhem Aissani, Haifa Tounsi, Mohsen Sakly, Lamjed Marzouki, Hichem Sebai
BACKGROUND: Matricaria recutita L. (Asteraceae), German chamomile, has been widely used in the traditional Tunisian medicine because of having the powerful health benefits. the current study was conducted to determine the protective effect of chamomile (Matricaria recutita L.) decoction extract (CDE) in ethanol-induced ulcer and oxidative stress on gastric mucosa in rat. METHODS: Adult male wistar rats were used and divided into seven groups: Control, EtOH, EtOH+various doses of CDE (25, 50 and 100mg/kg, b...
December 21, 2016: Pathophysiology: the Official Journal of the International Society for Pathophysiology
https://www.readbyqxmd.com/read/28024251/synthesis-structure-spectral-properties-and-dft-quantum-chemical-calculations-of-4-aminoazobenzene-dyes-effect-of-intramolecular-hydrogen-bonding-on-photoisomerization
#20
Anton Georgiev, Emil Bubev, Deyan Dimov, Denitsa Yancheva, Ivaylo Zhivkov, Jozef Krajčovič, Martin Vala, Martin Weiter, Maria Machkova
In this paper three different "push-pull" 4-aminoazobenzene dyes have been synthesized in order to characterize their photochromic behavior in different solvents. The molecular geometry was optimized by DFT/B3LYP functional combined with the standard 6-31+G(d,p) basis set for trans (E) and cis (Z) isomers and the energy levels of HOMO and LUMO frontier orbitals were computed using IEFPCM solvation in CHCl3 and DMF. The calculated results were compared to the experimental optical band gap and HOMO values of cyclic voltammetry...
December 9, 2016: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
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