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比特币未退烧比特币矿工的军备竞赛正在升温

商业周刊（中文版） 2014年第2期 74-79页

作者： Ashlee Vance Brad stor.Jake Stangel(摄影)

乔·弗利金杰（Joel Flickinger）的家位于美国加利福尼亚州奥克兰的一座山坡上，有两间卧室，屋里到处都是嗡嗡作响的定制电脑设备。一进门，在一个一般家庭可能会用作书房的房间里，他在壁炉旁放了一张桌子，上面摆着一台巨大的显示... 详细信息

乔·弗利金杰（Joel Flickinger）的家位于美国加利福尼亚州奥克兰的一座山坡上，有两间卧室，屋里到处都是嗡嗡作响的定制电脑设备。一进门，在一个一般家庭可能会用作书房的房间里，他在壁炉旁放了一张桌子，上面摆着一台巨大的显示器，左右两边的电线连着两台电脑主机，每个主机大约有一箱啤酒那么大。弗利金杰花了两万多美元来购置这些设备以及放在地下室的一台速度较慢的电脑。这些电脑连续不停地运转，发出的热量足以让屋子保暖，每个月光电费就高达400美元。屋子里没有什么装饰，只有一些手写的便条纸，上而的话语充满了正能量：

关键词：军备竞赛比特电脑设备矿工加利福尼亚州奥克兰显示器地下室

Evolution of Post-Surgical Scars Treated with Pure Rosehip Seed Oil

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Journal of Cosmetics, Dermatological Sciences and Applications 2015年第2期5卷 161-167页

作者： Pedro Valerón-Almazán Anselmo J. Gómez-Duaso Néstor.Santana-Molina Miguel A. García-Bello Gregorio Carretero Dermatology Service Hospital Universitario de Gran Canaria Dr. Negrin Las Palmas Spain Research Unit Hospital Universitario de Gran Canaria Dr. Negrin Las Palmas Spain

The rosehip seed oil (RHO), obtained from different plant species of the genus Rosa, is one of the compounds used empirically for cosmetic improvement of skin scarring. Despite its widespread use in clinical practice, there are few studies evaluating the activity of this compound on the clinical course of cutaneous scars. The aim of this study was to determine the effect of Repavar®?rosehip oil on improvement of post-surgical skin scars. One comparative, single-center, prospective clinical trial was carried out in 108 patients undergoing cutaneous surgery procedures in the Dermatology Service of University Hospital of Gran Canaria Dr. Negrín (Spain). Subjective parameters (erythema, discoloration, atrophy and hypertrophy) were evaluated at 6 and 12 weeks on 76 adults who treated scars with pure RHO twice a day (test group), 32 patients with not treatment (control group), and completed the study. Lesser degree of erythema was observed at 6 and 12 weeks in treated-patients compared with the control group and decreased discoloration and atrophy at 12 weeks, with statistically significant differences in all cases (p < 0.05). This study demonstrates that the RHO Repavar®?is useful for cosmetic improvement on erythema, discoloration and atrophyof post-surgical skin scars, getting a better overall evolution and appearance thereof.

关键词： Healing Skin Scar Rosa Mosqueta Rosehip Seed Oil Skin Surgery

Multispecies Multistrain Probiotic Effects on Calves Development and Health

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Open Journal of Veterinary Medicine 2012年第4期2卷 225-229页

作者： Mirentxu Indart Silvia Cerone Eduardo Néstor.Esteban Guadalupe de Yaniz Ana Graciela Inza Herminia Landi Silvina Mogni Leticia Igarza Department of Animal Health Faculty of Veterinary Science Universidad Nacional del Centro de la Provincia de Buenos Aires Buenos Aires Argentine Department of Animal Production Faculty of Veterinary Science Universidad Nacional del Centro de la Provincia de Buenos Aires Buenos Aires Argentine Department of Physiology and Pathology Faculty of Veterinary Medicine Universidad Nacional del Centro de la Provincia de Buenos Aires Buenos Aires Argentine

Experiment was designed to assess alimentary security or any beneficial effect on calve of a multispecies multistrain probiotic (MMP). An experiment with 36 calves, two day old, was conducted to assess the influence of probiotic on growth and health indicators. The treatment period was extended to 45 d. Group 1 received one daily dose of MMP (1.1 × 109 CFU per calf) during 20 d. Group 2 was the untreated control. On a weekly basis, every calf in each group was weighed to determine weight gain. Forty five days after the beginning of the experiment, blood samples were obtained from seven animals from Group 1 and six from Group 2, and peripheral blood neutrophils separated in order to determine metabolic and microbicidal activity. There was a significant increase in H2O2 production and NBT reduction test in MMP treated calves. The MMP not only lacks adverse effects when supplied as food additive, but showed health benefits. The prevention of infection and the highly significant increase of phagocytic activity in peripheral blood leukocytes seen in calves strongly suggest an efficient connection between the MMP and the immune system.

关键词： Probiotic Growth Health Immunology Calves

Structural Analysis of TiC and TiC-C Core-Shell Nanostructures Produced by Pulsed-Laser Ablation

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Journal of Materials Science and Chemical Engineering 2023年第7期11卷 1-13页

作者： Luis Enrique Iniesta Piña Miguel Ángel Camacho López Rafael Vilchis Néstor.Víctor Hugo Castrejón Sánchez Delfino Reyes Contreras Mestría en Ciencia de Materiales Facultad de Química Campus Rosedal Universidad Autónoma del Estado de México Toluca México Laboratorio de Fotomedicina Biofotónica y Espectroscopía Láser de Pulsos Ultracortos Facultad de Medicina Universidad Autónoma del Estado de México Toluca México Centro Conjunto de Investigación en Química Sustentable UAEM-UNAM Toluca México TecNM/Tecnológico de Estudios Superiores de Jocotitlán Jocotitlán México Laboratorio de Acústica y Nanomateriales Facultad de Ciencias Campus el Cerrillo Universidad Autónoma del Estado de México Toluca México

This paper reports on the ablation process of a pure Ti solid target immersed in a C-enriched acetone solution, leading to the production of titanium carbide (TiC) and Ti-C core-shell nanostructures. The used route of synthesis is generally called pulsed laser ablation in liquid (PLAL). The presence of carbon structures in the solution contributed to the carbon content in the produced Ti-based nanomaterials. The atomic composition of the produced nanostructures was analyzed using SEM-EDS, while TEM micrographs revealed the formation of spherical TiC and core-shell nanostructures ranging from 40 to 100 nm. The identification of atomic planes by HRTEM confirmed a 10 nm diameter C-shell with a graphite structure surrounding the Ti-core. Raman spectroscopy allowed for the identification of D and G peaks for graphite and a Raman signal at 380 and 600 cm−1, assigned to TiC. The results contribute to the state-of-the-art production of TiC and Ti-C core-shell nanostructures using the PLAL route.

关键词： Laser Ablation TiC Nanoparticles Core-Shell Nanoparticles Pulsed Laser

Compositional, Functional and Sensory Characteristics of Selected Mexican Cheeses

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Food and Nutrition Sciences 2014年第4期5卷 366-375页

作者： Irma Caro Sergio Soto Lucía Fuentes Néstor.Gutiérrez-Méndez Briselda García-Islas Karol E. Monroy-Gayosso Javier Mateo Centro de Investigación en Ciencia y Tecnología de los Alimentos Instituto de Ciencias Agropecuarias Universidad Autónoma del Estado de Hidalgo Tulancingo Mexico Departamento de Higiene y Tecnología de los Alimentos Universidad de León León Spain Departamento de Higiene y Tecnología de los Alimentos Universidad de León León Spain Instituto Tecnológico Superior del Oriente del Estado de Hidalgo Apan Mexico Facultad de Ciencias Químicas Universidad Autónoma de Chihuahua Chihuahua Mexico.

The aim of this study was to describe the compositional, functional and sensory properties of six traditional Mexican cheeses: Panela, Oaxaca, Manchego, Manchego Botanero, Tenate, and Morral. A total of 50 cheeses were analysed. Relevant compositional parameters including pH, aw, proximate composition, NaCl, sugars, lactic and acetic acids, mineral contents, free-amino acid nitrogen, fat acid degree value and total fatty acids were determined. In addition, colour and texture profile analyses of unmelted cheeses and their meltability were investigated. Furthermore, other 30 cheeses were used for a descriptive sensory analysis. Properties of cheeses were described, compared between each cheese, and related to their respective making processes.

关键词： Cheese Properties Oaxaca Panela Manchego Botanero Morral Ethnic Food Tenate Traditional Cheese

Process for the Obtention of Coumaric Acid from Coumarin: Analysis of the Reaction Conditions

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Advances in Chemical Engineering and Science 2013年第3期3卷 195-201页

作者： Néstor.N. López-Castillo Alma D. Rojas-Rodríguez Brenda M. Porta M. Javier Cruz-Gómez Chemical Engineering Department of the Faculty of Chemistry Universidad Nacional Autónoma de México (UNAM) Coyoacan D. F. México México

Coumaric acid can be obtained from basic hydrolysis of coumarin, through a reaction process consisting on opening the lactone ring and cis-trans isomerization. Parameters such as reaction time, temperature, NaOH concentration, solvent and reaction atmosphere, have been thoroughly studied and analyzed, in order to determine the appropriate conditions for the maximum conversion efficiency of coumarin into coumaric acid. Experimental results show that the best conditions are a 1 hour reaction time, at 160℃, with a 20% sodium hydroxide aqueous solution, and in an inert reaction atmosphere.

关键词： Coumarin Coumaric Acid Ester Hydrolysis

Crystal Structure and Electrical Properties of La0.45Ce0.1Li0.27TiO3Synthesized by Sol-Gel Technique

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New Journal of glass and Ceramics 2012年第1期2卷 59-64页

作者： Néstor.Fernández Purificación Escribano Eloisa Cordoncillo Héctor Beltrán Mario F. García-Sánchez Issis C. Romero-Ibarra Nahum Masó 不详

The lithium ionic conductingla0.45Ce0.1Li0.27TiO3 has been synthesized by sol-gel method. This solid is the result of substitutional doping with Ce(IV) in La0.45Ce0.1Li0.27TiO3 compound. The aim of the replacement of La(III) by Ce(IV) is increase the number of vacancies in the structure and favors the ionic mobility. Structural characterization shows that the obtained material have the expected tetragonal P4/mmm perovskite structure. Chemical analysis shows that composition was homogeneus in all the sample. The bulk conductivity measured at room temperature is about the same as previously reported for its related lanthanum lithium titanate. However, the lower activation energy for ionic conduction encourages further searching for better conductors in this system.

关键词： Lithium Ion Conductors Sol Gel Impedance Spectroscopy Perovskite

Chemical Treatment to Recover Molybdenum and Vanadium from Spent Heavy Gasoil Hydrodesulfurization Catalyst

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Advances in Chemical Engineering and Science 2012年第3期2卷 408-412页

作者： Alma Delia Rojas-Rodríguez Orlando Flores-Fajardo Fabiola Selene Alcántar González Néstor.Noé López Castillo Modesto Javier Cruz Gómez Chemical Engineering Department of the Faculty of Chemistry Universidad Nacional Autónoma de México (UNAM) Coyoacán México Faculty of Engineering Universidad Anáhuac México Norte México City México

Large quantities of spent hydrodesulfurization (HDS) catalysts are available from petrochemical industry. Disposal of spent catalyst is a problem as it falls under the category of hazardous industrial waste due to its vanadium concentration. Most of these catalysts are usually supported on alumina containing a variable percentage of elements such as nickel or molybdenum. Hence these catalysts contain environmentally critical, and economically valuable metals such as molyb denum, vanadium, and, nickel. In this paper, a spent HDS catalyst was treated with caustic soda solution. Parameters such as temperature, time, and NaOH solution concentration have been studied thoroughly, in order to settle the appropriate conditions for the maximum recovery of molybdenum and vanadium. Under the best leaching conditions (20 %w NaOH, room temperature, 2 h) about 95% recovery of Mo and V was achieved, and the recovery of nickel obtained was of 99% in the form of NiAlO4.

关键词： Spent HDS Catalyst Vanadium Molybdenum Metal Recovery

Nitrogen and Phosphorus Fertilization Promotes Aerial Part Development and Affect Nutrient Uptake by Carobinha of the Brazilian Cerrado

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American Journal of Plant Sciences 2017年第13期8卷 3377-3398页

作者： Willian Vieira Goncalves Maria do Carmo Vieira Thiago de Oliveira Carnevali Néstor.A.Heredia Zarate Heldo Denir Vhaldor Rosa Aran Katia Cristina Silva Mineli Agrarian Science Faculty Federal University of Grande Dourados—UFGDUniversity CityDouradosBrazil Federal University of Para—UFPA Sao SebastiaoBrazil Biological and Environmental Sciences Faculty UFGDDouradosBrazil

Producing Brazilian Cerrado plants, especially ones endangered, is essential for your maintenance. In this way, fertilization is furthermore uncertain. Here, we demonstrate the impact of soil addition of nitrogen (N, 4.20, 18.90, 31.50, 44.10 and 59.85 mg·dm-3) and phosphorus (P, 9.56, 57.38, 95.62, 133.86 and 181.67 mg·dm-3) fertilizers levels on the development and on nutrients uptake by Jacaranda decurrens subsp. symmetrifoliolata (carobinha), species of the Brazilian Cerrado, in a long term pot trial. The N and P addition together increased plant height and N concentration in roots. N and P also increased the P concentration and content on the roots in young plants, but in the older plants, isolated effect of both was stronger than their combined action. The N addition promoted branching, production of dry leaves and dry xylopodium, contents of K, Ca and P on the leaves, and N content on the roots. However, the N reduced xylopodium diameter, leaf area, and Mg contents in the young plants, but increased them in the older plants. The P addition increased stem diameter and dry biomass, P concentration and N content on the leaves, Ca content on the roots and also reduced N concentration on the leaves. However, the P addition increased Mg concentration on the roots in the young plants and reduced it in the older plants. In general, N levels ranging between 25.69 - 38.85 mg·dm-3 and P levels between 84.39 - 109.23 mg·dm-3 promote more effectively the plant development. Thus, N and P fertilization can promote the aerial development of plant and a differential allocation of nutrients between the carobinha tissues.

关键词： Jacaranda decurrens Sub sp.symmetrifoliolata Bignoniaceae Nitrogen Management Phosphorus Management