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https://www.readbyqxmd.com/read/28427917/application-of-the-isoniazid-assay-in-dried-blood-spots-using-the-ultra-performance-liquid-chromatography-tandem-mass-spectrometry
#1
Kyunghoon Lee, Sun-Hee Jun, Moon-Suk Choi, Sang Hoon Song, Jong Sun Park, Jae Ho Lee, Kyoung Un Park, Junghan Song
OBJECTIVES: Therapeutic drug monitoring (TDM) of anti-tuberculosis (TB) drugs is important for proper treatment of TB. Dried blood spots (DBSs) are widely used for TDM because of their several advantages. Rifampicin and pyrazinamide assays with DBSs have already been developed. However, isoniazid (INH) assay for capillary DBSs have not been reported because of INH instability. We developed an ultra-performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS) method for measuring INH concentrations in venous and capillary DBSs...
April 17, 2017: Clinical Biochemistry
https://www.readbyqxmd.com/read/28426946/quantification-of-rubidium-as-a-trace-element-in-beef-using-laser-induced-breakdown-spectroscopy
#2
Y Dixit, Maria P Casado-Gavalda, R Cama-Moncunill, Maria Markiewicz-Keszycka, X Cama-Moncunill, P J Cullen, Carl Sullivan
This study evaluates the potential of laser induced breakdown spectroscopy (LIBS) coupled with chemometrics to develop a quantification model for rubidium (Rb) in minced beef. A LIBSCAN 150 system was used to collect LIBS spectra of minced beef samples. Beef liver was used to spike the Rb levels in minced beef. All samples were dried, powdered and pelleted using a hydraulic press. Measurements were conducted by scanning 100 different locations with an automated XYZ sample chamber. Partial least squares regression (PLSR) was used to develop the calibration model, yielding a calibration coefficient of determination (Rc(2)) of 0...
April 1, 2017: Meat Science
https://www.readbyqxmd.com/read/28426040/enhancement-of-the-hole-conducting-effect-of-nio-by-a-n2-blow-drying-method-in-printable-perovskite-solar-cells-with-low-temperature-carbon-as-the-counter-electrode
#3
T A Nirmal Peiris, Ajay K Baranwal, Hiroyuki Kanda, Shota Fukumoto, Shusaku Kanaya, Ludmila Cojocaru, Takeru Bessho, Tsutomu Miyasaka, Hiroshi Segawa, Seigo Ito
In this article, we demonstrate for the first time a mesoscopic printable perovskite solar cell (PSC) using NiO as the hole transporting material and low-temperature processed carbon as the counter electrode. A single deposition method assisted by N2 blow drying was used for the deposition of MAPbI3 on a TiO2/ZrO2/NiO screen-printed electrode. As the final step a low-temperature processing (i.e. 75 °C) carbon counter layer was fabricated on MAPbI3 by a blade coating method. It is found that the capping layer thickness of MAPbI3 has a significant effect on the device efficiency, especially when NiO is introduced as a hole transporting material into the structure...
April 20, 2017: Nanoscale
https://www.readbyqxmd.com/read/28423894/stratification-and-size-segregation-of-ternary-and-polydisperse-colloidal-suspensions-during-drying
#4
Andrea Fortini, Richard P Sear
By means of Brownian Dynamics simulations, we investigate the drying process of three component and polydisperse colloidal suspensions. We have previously reported [Phys. Rev. Lett. 116 p.118301 (2016)] on the drying of binary mixtures. For binary mixtures, we found that a gradient of colloidal osmotic pressure develops during drying, and that this leads to the final film being stratified with a layer of the smaller particles on top of a layer of the larger particles. Here, we find that stratification by size is very general, and also occurs in ternary and polydisperse mixtures...
April 20, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28412681/research-on-in-vitro-release-of-isoniazid-inh-super-paramagnetic-microspheres-in-different-magnetic-fields
#5
Hongmeng Xie, Hua Huang, Wei He, Zhihong Fu, Cong Luo, Muhmmad Aqeel Ashraf
To explore in vitro release rules of isoniazid (INH) when Isoniazid Super paramagnetic Iron Oxide Microspheres (ISPIOM) are subject to no external magnetic field, applied mechanical magnetic field and scillating magnetic field. ISPIOM was prepared by using the spray drying method; Isoniazid contented in the microspheres was determined, the drug loading capacity and encapsulation efficiency were calculated. Release of isoniazid in the microspheres was determined respectively under the effect of no external magnetic field, applied mechanical magnetic field and oscillating magnetic field, to explore the release rules...
November 2016: Pakistan Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28411538/formulation-of-crude-oil-spill-dispersants-based-on-the-hld-concept-and-using-a-lipopeptide-biosurfactant
#6
Witchaya Rongsayamanont, Suwat Soonglerdsongpha, Nichakorn Khondee, Onruthai Pinyakong, Chantra Tongcumpou, David A Sabatini, Ekawan Luepromchai
Solvent-free dispersants for crude oil spills were formulated based on the hydrophilic-lipophilic deviation (HLD) concept and using lipopeptides from Bacillus sp. GY19. The lipopeptides were recovered and concentrated from cell-free broth by foam fractionation and freeze-drying. They had good surface activity under varying temperatures, pH and NaCl levels. Moreover, the lipopeptides had low toxicity to copepods (LC50 1174mg/L) and whiteleg shrimp (LC50 1050mg/L). The characteristic curvature (Cc) of the lipopeptides showed that they were more hydrophobic (Cc 4...
April 4, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28408348/design-and-in-vivo-evaluation-of-solid-lipid-nanoparticulate-systems-of-olanzapine-for-acute-phase-schizophrenia-treatment-investigations-on-antipsychotic-potential-and-adverse-effects
#7
Emil Joseph, Satish Reddi, Vibhu Rinwa, Garima Balwani, Ranendra Saha
The present paper discusses the design, characterization and in vivo evaluation of glyceryl monostearate nanoparticles of Olanzapine, an atypical antipsychotic drug for acute schizophrenia treatment, during which hospitalization is mandatory and adverse effects are at its peak. The solid lipid nanoparticulate system was obtained by emulsification-ultra sonication technique wherein three factors such as solid lipid content, concentration of surfactant and drug: solid lipid ratio were selected at three different levels in order to study their influence on significant characteristic responses such as particle size, encapsulation efficiency and drug content...
April 10, 2017: European Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28403612/polymer-coated-ultrastable-and-biofunctionalizable-lanthanide-nanoparticles
#8
Yurong Que, Chun Feng, Guolin Lu, Xiaoyu Huang
Lanthanide-containing nanoparticles (LnNPs), for example, NaYF4, are considered to be one of the most promising platforms for biological and material applications due to their unique and unusual magnetic and upconversion fluorescent properties. However, limited water dispersity, low long-term colloidal stability, and difficulty in further functionalization greatly narrow the scope of their application in the real world. Herein, we report a facile strategy to counter the aforementioned barriers to the expanding use of LnNPs that involves surface-coating the LnNPs with poly(ethylene glycol)-b-poly(pentafluorophenyl methacrylate)/phosphonic acid and subsequently shell cross-linking with NH2-PEG-NH2...
April 21, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28397862/a-robust-salt-tolerant-superoleophobic-alginate-graphene-oxide-aerogel-for-efficient-oil-water-separation-in-marine-environments
#9
Yuqi Li, Hui Zhang, Mizi Fan, Peitao Zheng, Jiandong Zhuang, Lihui Chen
Marine pollution caused by frequent oil spill accidents has brought about tremendous damages to marine ecological environment. Therefore, the facile large-scale preparation of three-dimensional (3D) porous functional materials with special wettability is in urgent demand. In this study, we report a low-cost and salt-tolerant superoleophobic aerogel for efficient oil/seawater separation. The aerogel is prepared through incorporating graphene oxide (GO) into alginate (ALG) matrix by using a facile combined freeze-drying and ionic cross-linking method...
April 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28396157/coupled-brain-and-urine-spectroscopy-in-vivo-metabolomic-characterization-of-hmg-coa-lyase-deficiency-in-5-patients
#10
Dominique Roland, Patrice Jissendi-Tchofo, Gilbert Briand, Joseph Vamecq, Monique Fontaine, Vincent Ultré, Cécile Acquaviva-Bourdain, Karine Mention, Dries Dobbelaere
BACKGROUND: 3-Hydroxy-3-Methylglutaryl-Coenzyme A (HMG-CoA) lyase deficiency is a rare inborn error of leucine metabolism and ketogenesis. Despite recurrent hypoglycemia and metabolic decompensations, most patients have a good clinical and neurological outcome contrasting with abnormal brain magnetic resonance imaging (MRI) signals and consistent abnormal brain proton magnetic resonance spectroscopy ((1)H-MRS) metabolite peaks. Identifying these metabolites could provide surrogate markers of the disease and improve understanding of MRI-clinical discrepancy and follow-up of affected patients...
March 30, 2017: Molecular Genetics and Metabolism
https://www.readbyqxmd.com/read/28375570/influence-of-freezing-temperatures-prior-to-freeze-drying-on-viability-of-yeasts-and-lactic-acid-bacteria-isolated-from-wine
#11
Lucía Polo, Rosario Mañes-Lázaro, Isidoro Olmeda, Liz Erika Cruz-Pio, Ángel Medina, Sergi Ferrer, Isabel Pardo
AIMS: Determine the effect of three different freezing temperatures on post-freeze-drying survival rates of wine yeasts and lactic acid bacteria (LAB). To know if a similar freeze-drying protocol can be used for both microorganisms. METHODS AND RESULTS: Cells from liquid culture media were recovered and concentrated in appropriate lyoprotectants. Aliquots of each strain were frozen at -20, -80 and -196°C before vacuum drying. Viable cell counts were done before freezing and after freeze-drying...
April 4, 2017: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/28370537/an-innovative-freeze-dried-reduced-graphene-oxide-supported-sns2-cathode-active-material-for-aluminum-ion-batteries
#12
Yuxiang Hu, Bin Luo, Delai Ye, Xiaobo Zhu, Miaoqiang Lyu, Lianzhou Wang
Rechargeable aluminum-ion batteries (AIBs) are attractive new generation energy storage devices due to its low cost, high specific capacity, and good safety. However, the lack of suitable electrode materials with high capacity and enhanced rate performance makes it difficult for real applications. Herein, the preparation of 3D reduced graphene oxide-supported SnS2 nanosheets hybrid is reported as a new type of cathode material for AIBs. The resultant material demonstrates one of the highest capacities of 392 mAh g(-1) at 100 mA g(-1) and good cycling stability...
March 29, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28365551/microwave-drying-remediation-of-petroleum-contaminated-drill-cuttings
#13
Irineu Petri Júnior, André Leibsohn Martins, Carlos H Ataíde, Cláudio R Duarte
The oil reservoir drilling phase generates contaminated cuttings with oil formation itself. These cuttings must be subjected to a decontamination process before being disposed of in the environment. Several technologies are cited in literature for the remediation of soil contaminated with oil or diesel, but none have been reported to remedy drill cuttings contaminated with oil from reservoir. The reservoir drill cuttings are a problem because its discharge is not allowed. The drying technology using microwave has shown promise in the decontamination of cuttings with non-aqueous base drilling fluid, conciliating good robustness and high removal efficiency...
March 30, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28363100/strategies-for-liquid-liquid-extraction-of-oxide-particles-for-applications-in-supercapacitor-electrodes-and-thin-films
#14
Ri Chen, Mustafa S Ata, Xinya Zhao, Amanda Clifford, Ishwar Puri, Igor Zhitomirsky
Bottom-up and top-down liquid-liquid extraction methods have been developed for the transfer of colloidal metal oxide particles, synthesized in an aqueous phase, to organic phases. In such methods the agglomeration of the particles during the drying stage was avoided. Hexadecylamine was used as an extractor for MnO2 particles in the bottom-up extraction to the 1-butanol phase and top-down extraction to the dichloromethane phase. The reduction of particle agglomeration facilitated the fabrication of MnO2-carbon nanotube composite electrodes for electrochemical supercapacitors with enhanced mixing of the individual components and active mass as high as 35mgcm(-2)...
March 23, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28357003/alveolar-ridge-preservation-after-tooth-extraction-with-dfdba-and-platelet-concentrates-a-radiographic-retrospective-study
#15
Behrang Baniasadi, Laurence Evrard
OBJECTIVES: The purpose of this study was to evaluate vertical alveolar bone loss 3 months after tooth extraction when a technique of ridge preservation was applied using a particulate demineralized freeze-dried bone allograft 300 - 500 µm associated with platelet concentrates (platelet-rich-fibrin) in the form of gel and membranes. MATERIAL AND METHODS: A retrospective radiological clinical study was conducted on 56 patients for whom 95 extractions had been performed immediately followed by alveolar filling...
2017: Open Dentistry Journal
https://www.readbyqxmd.com/read/28353375/determination-of-serum-carbamazepine-concentration-using-dried-blood-spot-specimens-for-resource-limited-settings
#16
Saibal Das, Denise H Fleming, Binu S Mathew, Blessed Winston A, Appaswamy T Prabhakar, Mathew Alexander
OBJECTIVES: Carbamazepine (CBZ) is a commonly used anti-epileptic in rural hospitals in India. These hospitals lack the facilities to measure CBZ concentration; however, in larger hospitals this is performed using high performance liquid chromatography (HPLC). Dried blood spot (DBS) represents a feasible matrix for safe transportation by post/courier. This study was to determine whether the concentration of CBZ in serum can be predicted from that measured in DBS using an inexpensive HPLC method and inexpensive standard filter paper...
April 2017: Hospital Practice (Minneapolis)
https://www.readbyqxmd.com/read/28345304/chemical-evidence-for-the-effect-of-urochloa-ruziziensis-on-glyphosate-resistant-soybeans
#17
Mariluce Nepomuceno, Nuria Chinchilla, Rosa M Varela, José M G Molinillo, Rodney Lacret, Pedro L C A Alves, Francisco A Macias
BACKGROUND: Soybean (Glycine max) is an important oleaginous legume that has been cultivated in new areas in Brazil, including pastures. Problems of reduced production yields have been reported by soybean growers when the crop is sown immediately after desiccation of pastures of Urochloa spp. using glyphosate. The objective of this work was to extract, isolate, and identify the major chemicals from U. ruziziensis that have phytotoxic activity and to evaluate the possible relation between this effect and the reduced soybean yield...
March 26, 2017: Pest Management Science
https://www.readbyqxmd.com/read/28319384/eugenol-nanoemulsion-stabilized-with-zein-and-sodium-caseinate-by-self-assembly
#18
Lei Wang, Yue Zhang
Eugenol-loaded nanoemulsion by zein and sodium caseinate (NaCas) was prepared without using specific equipment or organic solvents. The deprotonated eugenol in hot alkaline was added to NaCas/zein mixtures with different mass ratios at pH 11.5 and then neutralized to pH 7.0. The nanoemulsions showed a well-defined diameter (around 109-139 nm) and a negative surface potential (from -28.5 to -35.8 mV) with spherical morphology. The entrapment efficiency (EE) of 1% (v/v) eugenol reached 84.24% by 2% (m/v) NaCas/zein at a mass ratio of 1:1...
March 31, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28302120/responsiveness-of-cats-felidae-to-silver-vine-actinidia-polygama-tatarian-honeysuckle-lonicera-tatarica-valerian-valeriana-officinalis-and-catnip-nepeta-cataria
#19
Sebastiaan Bol, Jana Caspers, Lauren Buckingham, Gail Denise Anderson-Shelton, Carrie Ridgway, C A Tony Buffington, Stefan Schulz, Evelien M Bunnik
BACKGROUND: Olfactory stimulation is an often overlooked method of environmental enrichment for cats in captivity. The best known example of olfactory enrichment is the use of catnip, a plant that can cause an apparently euphoric reaction in domestic cats and most of the Pantherinae. It has long been known that some domestic cats and most tigers do not respond to catnip. Although many anecdotes exist of other plants with similar effects, data are lacking about the number of cats that respond to these plants, and if cats that do not respond to catnip respond to any of them...
March 16, 2017: BMC Veterinary Research
https://www.readbyqxmd.com/read/28301177/trust-trolleys-and-social-dilemmas-a-replication-study
#20
Dries H Bostyn, Arne Roets
The present manuscript addresses how perceived trustworthiness of cooperative partners in a social dilemma context is influenced by the moral judgments those partners make on Trolley-type moral dilemmas; an issue recently investigated by Everett, Pizarro, and Crockett (2016). The present research comprises 2 studies that were conducted independently, simultaneously with, and incognizant of the Everett studies. Whereas the present studies aimed at investigating the same research hypothesis, a different and more elaborate methodology was used, as such providing a conceptual replication opportunity and extension to the Everett et al...
March 16, 2017: Journal of Experimental Psychology. General
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