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Novel strategies to tailor the photocatalytic activity of metal–organic frameworks for hydrogen generation: a mini-review

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Frontiers in Energy 2022年第5期16卷 734-746页

作者： Luis A.ALFONSO-HERRERA leticia M.TORRES-MARTINEZ J.Manuel MORA-HERNANDEZ Universidad Autónoma de Nuevo León UANLFacultad de Ingeniería CivilDepartamento de Ecomateriales y EnergíaAv.Universidad S/N Ciudad UniversitariaSan Nicolás de los GarzaNuevo León 66455México Centro de Investigación en Materiales Avanzados S.C.(CIMAV)Miguel de Cervantes No.120.Complejo Ind.ChihuahuaChihuahuaChih 31136México CONACYT-Universidad Autónoma de Nuevo León UANLFacultad de Ingeniería CivilDepartamento de Ecomateriales y EnergíaAv.Universidad S/N Ciudad UniversitariaSan Nicolás de los GarzaNuevo León 66455México

This review provides a recompilation of the most important and recent strategies employed to increase the efficiency of metal-organic framework(MOF)-based systems toward the photocatalytic hydrogen evolution(PHE)reaction through specific strategies:tailoring the photocatalytic activity of bare MOFs and guest@MOF composites,formation of heterojunctions based on MOFs and various photocatalysts,and inorganic photocatalysts derived from *** to the data reported in this mini-review,the most effective strategy to improve the PHE of MOFs relies on modifying the linkers with new secondary building units(SBUs).Although several reviews have investigated the photocatalytic activity of MOFs from a general point of view,many of these studies relate this activity to the physicochemical and catalytic properties of ***,they did not consider the interactions between the components of the photocatalytic *** study highlights the effects of strength of the supramolecular interactions on the photocatalytic performance of bare and MOF-based materials during PHE.A thorough review and comparison of the results established that metal-nanoparticle@MOF composites have weak van der Waals forces between components,whereas heterostructures only interact with MOFs at the surface of bare *** material derivatives from MOFs,we found that pyrolysis destroyed some beneficial properties of MOFs for ***,we conclude that adding SBUs to organic linkers is the most efficient strategy to perform the PHE because the SBUs added to the MOFs promote synergy between the two materials through strong coordination bonds.

关键词： metal-organic frameworks(MOFs) photocatalytic hydrogen evolution MOF heterojunctions materials derived from MOFs bandgap recombination

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A tumor-associated heparan sulfate-related glycosaminoglycan promotes the generation of functional regulatory T cells

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Cellular & Molecular Immunology 2023年第12期20卷 1499-1512页

作者： leticia Martín-Cruz Marcos Viñuela Ioanna Kalograiaki Alba Angelina Paola Oquist-Phillips Irene Real-Arévalo Francisco Javier Cañada JoséIgnacio Tudela Luis Moltó Jesús Moreno-Sierra JoséLuis Subiza Oscar Palomares Department of Biochemistry and Molecular Biology School of ChemistryComplutense University of MadridMadridSpain Inmunotek Alcaláde HenaresMadridSpain Fundación Investigación Hospital Clínico san Carlos Martin Lagos s/n28040MadridSpain Centro de Investigaciones Biológicas Margarita Salas CSICRamiro de Maetzu 928040MadridSpain CIBER de Enfermedades Respiratorias(CIBERES)Avda Monforte de Lemos3-528029MadridSpain Servicio de Urología Hospital Clínico San CarlosUniversidad Complutense de MadridMartín Lagos s/n28040MadridSpain

Functional Tregs play a key role in tumor development and progression,representing a major barrier to anticancer *** mechanisms by which Tregs are generated in cancer and the influence of the tumor microenvironment on these processes remain incompletely ***,by using NMR,chemoenzymatic structural assays and a plethora of in vitro and in vivo functional analyses,we demonstrate that the tumoral carbohydrate A10(Ca10),a cell-surface carbohydrate derived from Ehrlich’s tumor(ET)cells,is a heparan sulfate-related proteoglycan that enhances glycolysis and promotes the development of tolerogenic features in human ***10-stimulated human DCs generate highly suppressive Tregs by mechanisms partially dependent on metabolic reprogramming,PD-L1,IL-10,and ***10 also reprograms the differentiation of human monocytes into DCs with tolerogenic *** solid ET-bearing mice,we found positive correlations between Ca10 serum levels,tumor size and splenic Treg *** of isolated Ca10 also increases the proportion of splenic Tregs in tumor-free ***,we provide evidence supporting the presence of a circulating human Ca10 counterpart(Ca10H)and show,for the first time,that serum levels of Ca10H are increased in patients suffering from different cancer types compared to healthy *** note,these levels are higher in prostate cancer patients with bone metastases than in prostate cancer patients without ***,we reveal novel molecular mechanisms by which heparan sulfate-related structures associated with tumor cells promote the generation of functional Tregs in *** discovery of this novel structural-functional relationship may open new avenues of research with important clinical implications in cancer treatment.

关键词： Tumoral carbohydrate A10 Heparan sulfate-related proteoglycan Cancer immunology Dendritic cell Regulatory T cell

Selection of Lactic Acid Bacteria Isolated from san Simón da Costa Cheese (PDO) in Order to Develop an Autochthonous Starter Culture

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Advances in Microbiology 2015年第11期5卷 748-759页

作者： leticia González Araceli Fernández Cuadrillero José María Castro Ana Bernardo María Eugenia Tornadijo Department of Food Hygiene and Technology University of León León Spain Institute of Food Science and Technology (ICTAL) University of León León Spain

Traditional cheeses are an important reservoir of microbial diversity that can have important biotechnological applications, especially with a view to improving the characteristics unique to each type of cheese, and in this respect, starter cultures consisting of autochthonous lactic acid bacteria strains are of particular interest. In the present study, we investigated lactic acid bacteria population diversity in san Simón da Costa cheese (PDO, Galicia, Spain) and found a predominance of the genus Lactobacillus, which by the end of ripening accounted for 78% of the strains isolated in Rogosa agar, around 40% of those in M17 agar and about 10% of those in MSE agar. The main species of lactic acid bacteria identified were Lactococcus lactis subsp. lactis, Lactobacillus casei subsp. casei, Lb. paracasei subsp. paracasei, Leuconostoc mesenteroides and Enterococcus faecalis. Virtually all the strains studied from a technological point of view yielded more than or equal to 0.24 g 100 mL-1 lactic acid. Lactococcus lactis subsp. lactis (SS 194), Lactobacillus paracasei (SS 1695 and SS 1689) and Enterococcus faecalis (SS 1378 and SS 1449) strains exhibited the greatest proteolytic capacity. Based on the overall technological aptitude of the tested strains, we can propose starter cultures and co-cultures that include different combinations of previous strains with a view to manufacturing san Simón da Costa cheese from pasteurised milk.

关键词： Cow Milk Cheese Lactic Acid Bacteria Enzymatic Activities Autochthonous Starter

Enhanced production of thermostable laccases from a native strain of Pycnoporus sanguineus using central composite design

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2014年第4期15卷 343-352页

作者： leticia I. RAMíREZ-CAVAZOS Charles JUNGHANNS Rakesh NAIR Diana L. CáRDENAS-CHáVEZ Carlos HERNáNDEZ-LUNA Spiros N. AGATHOS Roberto PARRA Centro del Agua para América Latina y el Caribe Tecnológico de MonterreyCampus MonterreyNL 64849Mexico Helmholtz Centre for Environmental Research-UFZ Permoserstra?e 1504318 LeipzigGermany Bioengineering Group Earth and Life InstituteUniversité Catholique de LouvainPlace Croix du Sud2Box L7.05.191348 Louvain-la-NeuveBelgium Laboratorio de Enzimología Facultad de Ciencias BiológicasUniversidad Autónoma de Nuevo LeónAv. Universidad s/nCiudad UniversitariaSan Nicolás de los GarzaNL 64450Mexico

The production of thermostable laccases from a native strain of the white-rot fungus Pycnoporus sanguineus isolated in Mexico was enhanced by testing different media and a combination of inducers including copper sulfate（CuSO4）.The best conditions obtained from screening experiments in shaken flasks using tomato juice,CuSO4,and soybean oil were integrated in an experimental *** levels of tomato juice as the medium,CuSO4and soybean oil as inducers（36.8%（v/v）,3 mmol/L,and 1%（v/v）,respectively） were determined for 10 L stirred tank bioreactor *** combination resulted in laccase titer of 143000 IU/L（2,2＇-azino-bis（3-ethylbenzthiazoline-6- sulfonic acid）,pH 3.0）,which represents the highest activity so far reported for *** in a 10-L *** interesting media resulting from the screening included glucose-bactopeptone which increased laccase activity up to 20000 IU/L,whereas the inducers Acid Blue 62 and Reactive Blue 19 enhanced enzyme production in this medium 10 *** on a partial characterization,the laccases of this strain are especially promising in terms of thermostability（half-life of 6.1 h at 60 °C） and activity titers.

关键词： Enhanced laccase production Central composite design Screening media Inducers Tomato juice medium Soybean oil Copper sulfate

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Ammonium Thiosulfate Ecological Viable Alternative to Replace Sodium Cyanide in Gold and Silver Dissolution Ores

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Journal of Environmental Science and Engineering(A) 2016年第5期5卷 223-229页

作者： Maria del Carmen Hernandez Maria del Carmen Avitia Heriberto Pena Irma leticia Gonzalez Nancy Veronica Torres Abdiel Rosaldo Felix[ Luis Miguel Rodriguez Laura Bibiana Hernandez Department of Chemical and Biochemical Engineering Technological Institute of Parral Chihuahua 33850 Mexico Department of Economic Administrative Department Technological Institute of Parral Chihuahua 33850 Mexico Department of Industrial Engineering Technological Institute of Parral Chihuahua 33850 Mexico Engineering and Independent Consultant Palma Triangular 108 San Jose de Pozo Bravo Aguascalientes 20126 Mexico

The southern region of the state of Chihuahua is mining by origin, as this has been proved ghost towns of Minas Nuevas, it is also called Villa Escobedo, Emerald and Blue. Minerals are nonrenewable resources. There are only reserves and waste deposited in tailings ponds of low-rade precious metals （gold and silver）. A conventional method for recovering gold and silver ore is low-grade cyanidation and the solvent consider toxic and highly dangerous for the flora, fauna, humans and the environment. The mechanism of cyanide poisoning is inhibition of cytochrome oxidase--an enzyme needed for cell respiration. Without compromising efficiency, sensitivity and cost of the process, the toxic solvent is replaced by a less aggressive one, which helps the environment, public and occupational health. （NH4）2S203 has no appreciable damage to conservative amounts, is a selective aqueous solvent for leaching gold and silver, easy to get and manipulate. This work is done in the Technological Institute of Parral in a low-grade ore from the southern region of the state of Chihuahua. This document has been enriched presented in the IMEC 2014, with the increase of series Ⅴ and Ⅵ.

关键词： Leaching cyanide ammonium thiosulfate.

Health Risk Assessment in Children by Arsenic and Mercury Pollution of Groundwater in a Mining Area in Sonora, Mexico

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Journal of Geoscience and Environment Protection 2019年第6期7卷 90-105页

作者： José Leopoldo Mendoza-Lagunas Diana María Meza-Figueroa Marco Antonio Martínez-Cinco Mary Kay O’Rourke Elena Centeno-García Francisco Martin Romero leticia García-Rico María Mercedes Meza-Montenegro Programa de Doctorado en Ciencias en Biotecnologia Instituto Tecnológico de Sonora Ciudad Obregón México División de Ciencias Exactas y Naturales Departamento de Geología Universidad de Sonora Rosales y Encinas Hermosillo México División de Estudios de Posgrado Facultad de Ingeniería Química Universidad Michoacana de San Nicolás de Hidalgo (UMSNH) Morelia México Mel & Zuckerman College of Public Health University of Arizona Tucson AZ USA Instituto de Geología Universidad Nacional Autónoma de México Ciudad Universitaria Delegación Coyoacán Ciudad de México México Centro de Investigación en Alimentos y Desarrollo Hermosillo México Dirección de Recursos Naturales InstitutoTecnológico de Sonora Obregón México

A highly acidic spill from one of the most important copper mines in the Americas (Buenavista del Cobre) occurred in Sonora, Mexico in August, 2014. 40,000 m3 of metals-enriched sulphate solution escaped into the Sonora River representing the worst ecological disaster in Mexican history. The spill affected the economy, water accessibility and the health of residents near the river. Despite the economic importance of mining in this area, no environmental assessment was undertaken. There is no information about the health impact of this event on the local population. The study assesses the health risk among children exposed to arsenic and mercury via groundwater in five communities located in a mining area into the Sonora River Basin, Mexico. Local drinking water from the localities was sampled one year after the spill and it was analyzed for arsenic and mercury by Atomic Absorption Spectrometry coupled with Hydride Generation (AAS/HG). Further, some of the traditional local foods were sampled and analyzed for the same elements. Results indicate that levels of arsenic in drinking water did not exceed the Mexican Norm (25 μg As/L) or the EPA Guideline (10 μg As/L). The concentrations of mercury exceeded the WHO and Mexican Legislation value (1.0 μg Hg/L). The Hazard Quotient (HQ) values for arsenic were >1 in 42% of children exposed and for mercury in 67% of the children. Foods concentrations contained in the ranges of 9.2 to 62.0 μg As/Kg and 0.28 to 42 μg Hg/Kg for arsenic and mercury respectively. These values are below the Codex Alimentarius limits. Children affected by mining activities are at risk of developing chronic diseases associated with low arsenic and mercury exposure via groundwater consumption, without consideration of the contribution from these metals by other important exposures routes.

关键词： Hazard Quotient Mining Mercury Arsenic Children

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3.0T MRI人脊髓静息态功能连接

国际医学放射学杂志 2016年第3期 317-317页

作者： O.san emeterio Nateras F.Yu E.R.Muir C.Bazan C.G.Franklin W.Li 吴龙 Research Imaging Institute Department of Radiologyand Department of OphthalmologyUniversity of Texas Health Science Center

摘要目的应用静息态功能MRI绘制人类脊髓功能连接图。材料与方法在志愿者知情同意和伦理委员会批准的基础上,对9例自称健康的志愿者进行研究。在3.0 T临床MR设备上应用静息态功能MRI以1 mm×1 mm×3 mm分辨率绘制C1到C4脊髓的功能连接... 详细信息

摘要目的应用静息态功能MRI绘制人类脊髓功能连接图。材料与方法在志愿者知情同意和伦理委员会批准的基础上,对9例自称健康的志愿者进行研究。在3.0 T临床MR设备上应用静息态功能MRI以1 mm×1 mm×3 mm分辨率绘制C1到C4脊髓的功能连接图。通过独立成分分析获得静息态功能MRI的二维和三维影像。对与Pearson相关独立

关键词： MRI 脊髓功能静息态脊髓脑

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人体玻璃体:氧分压的MR成像

国际医学放射学杂志 2013年第3期 269-269页

作者： E.R.Muir Y.Zhang O.san emeterio Nateras Q.Peng T.Q.Duong 陶志刚 Research Imaging Institute University of Texas Health Science Center

目的开发一种可对人体玻璃体无创性氧分压[p(02)]定量图像的MR成像方法。材料与方法人体研究均通过伦理委员会批准,所有受试者签署知情同意书并符合HIPAA。动物实验研究经动物保护委员会批准。此MR成像方法是用3.0TMR来测量水的纵向弛豫... 详细信息

目的开发一种可对人体玻璃体无创性氧分压[p(02)]定量图像的MR成像方法。材料与方法人体研究均通过伦理委员会批准,所有受试者签署知情同意书并符合HIPAA。动物实验研究经动物保护委员会批准。此MR成像方法是用3.0TMR来测量水的纵向弛豫率(R1)值。R1值通过多个不同p(02)和温度条件下的水模型(n=10)及体外动物玻璃体(n=2)进行校准。人体玻璃体p(02)的成像研究通过3名志愿者(年龄26～28岁)进行,并在不同日期的多个时间段进行,以评估其可重复性。通过采集眼睛睁开和闭合不同状态下的数据评估温度和环境空气的影响。统计分析方法为t检验,P<0.05有统计学意义。结果通过模型及体外动物玻璃体的校准发现R1值在37℃条件下与氧气的关系表现为0.209s-1+p(02)·2.07×10-4s-1/mmHg(1mmHg=0.133kPa),与温度(Δ[1/R1]/ΔT)的关系表现为(0.106±0.009)s/℃。模型与玻璃体的R1值是有差异的。如果不予纠正,玻璃体p(02)会被明显高估(P<0.001)。人体玻璃体p(02)测量图提示有空间差异,整个玻璃体的p(02)为(16.7±6.5)mmHg(闭眼状态下)。眼睛睁开与闭合状态下的测量表明空间相关性的R1值差异可转换为全眼0.34～0.83℃的温度差异。结论本研究建立了一个MR成像方法,可以通过影像无创性地定量分析玻璃体p(02),并且可以评估玻璃体内大分子、温度梯度以及环境空气对玻璃体p(02)值的影响。使用MR成像来测定玻璃体p(02)有可能用于眼科疾病的无创性研究。

关键词： MR 动物玻璃体氧分压

Structural and Optical Characterization of Indium Zinc Oxynitride Thin Films

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材料科学与工程（中英文A版） 2014年第3期4卷 91-98页

作者： Jose Juan Ortega Sigala Maria leticia Perez Arrieta Hugo TototzintleHuitle Miguel Angel Aguilar Frutis Ciro Falcony Victor Hugo Mendez Garcia Jose de Jesus Araiza Ibarra Academic Unit of Physics UAZ Zacatecas C.P. 98060 Me~xico CIACyT UASLP San Luis Potosl C.P. 78210 Mexico CICATA 1PN Mexico D.F. C.P. 11500 Mexieo Department of Physics CINVESTA V IPN Mexico D.F. C.P. 07360 Mexico

Indium zinc oxynitride (IZON) thin films were deposited on Si(100) substrates by RF reactive magnetron sputtering at different substrate temperature to study their structural and optical properties. All the films were deposited in a reactive atmosphere of nitrogen and argon. As precursor material, an IZO target (In 2 O 3 -ZnO, 90-10 wt%) with a purity of 99.99% was used. The crystalline structure of the films was analyzed by X-Ray diffraction technique (XRD), the deposited IZON thin films were practically amorphous with some polycrystalline contents for the films deposited at 100 °C and 300 °C. The refractive index and the extinction coefficient had been obtained from Spectral Ellipsometry (SE) analyses using the Classical and Adachi models, both results were qualitatively and quantitatively approximate. These optical results were analyzed and used to propose roughness values of the films surface, through of an appropriate proposal of the structure of the films. The roughness values obtained from optical models were compared with the morphological results studied by Atomic Force Microscopy (AFM), and the roughness values, obtained by direct and indirect measure, were consistent between them. The incorporated nitrogen reduced the typical crystallization of IZO and favored the deposition of transparent thin films with very flat surfaces, these results shows that the IZON has an ideal amorphous material for applications as conductive oxynitride layers.

关键词：氧化锌薄膜氧氮化物晶体结构光学特性 Si(100) 椭圆偏振光谱法薄膜沉积反应磁控溅射