Desain Komunikasi Visual sebagai Media Promosi Pariwisata

Bukittinggi is one of tourism city in Indonesia, Geographic location and natural resources become an asset to the city as a tourism Bukittinggi, this is because the number of interesting attractions, make this city dubbed as a "tourist town". Canyon Sianok is one of the natural attractions which are visited by tourists both from within and outside the country, where there are parks Panorama that allows tourists to view the scenic beauty of the canyon Sianok. Development of tourism promotion Bukittinggi in animated form, can improve communication reliability and overcome the limitations of time and distance so that what is displayed to attract attention and can create dynamic and interactive presentations. Animation can also create something that has a unique character that is easy to remember and is known, even well like, through animation is expected to increase tourist arrivals in Bukittinggi

Исследование мезоструктуры биоактивных покрытий для каменных материалов на основе эпоксидно-силоксановых золей, модифицированных наноалмазами, методом малоуглового рассеяния нейтронов

Методом малоуглового рассеяния нейтронов (МУРН) исследовано структурообразование синтезирован- ных золь-гель-методом эпоксидно-силоксановых композиций с разным соотношением основных прекурсоров (RTEOS/EPONEX1510 = 16/38, 27/27, 38/16mass%), а также с разной концентрацией наноалмаза детонационного синтеза (cDNA = 0.05, 0.1, 0.2mass%). На основе данных МУРН выявлено, что синтезированные эпоксидно-силоксановые ксерогели представ- ляют собой системы с двухуровневой фрактальной структурой, в образовании которой доминирующая роль принадлежит силоксановой составляющей. Обнаружено, что как фрактальная размерность Dm2, так и радиус гирации Rg2 кластеров в эпоксидно-силоксановых композициях снижаются с ростом содержания силоксановой составляющей. Установлено, что введение в эпоксидно-силоксановую композицию с равным соотношением основных прекурсоров RTEOS/EPONEX1510 = 27/27mass% малых добавок детонационного нано- алмаза (менее 1mass%) приводит к переходу от двухуровневой к трехуровневой структурной организации и влияет на фрактальную размерность Dm и радиус гирации Rg формируемых кластеров

Структура магнитной жидкости магнетит-олеиновая кислота-декалин с избытком кислоты по данным малоуглового рассеяния нейтронов

Посредством малоуглового рассеяния нейтронов определены структурные параметры магнитной жидкости магнетит−олеиновая кислота−декалин при различном избытке олеиновой кислоты (до 25 vol.%). Из сравнения поведения олеиновой кислоты в магнитной жидкости и в чистом растворителе (декалине) сделан вывод об изменении взаимодействия между молекулами свободного (неадсорбированного) поверхностно- активного вещества в присутствии магнитных наночастиц. Тем не менее, система остается стабильной и не обнаруживает агрегатов ни магнитных наночастиц, ни свободной олеиновой кислоты. Проведено сравнение полученных результатов с ранее представленными данными для аналогичных магнитных жидкостей на основе бензола

Joint neutron/X-ray crystal structure of a mechanistically relevant complex of perdeuterated urate oxidase and simulations provide insight into the hydration step of catalysis

Cofactor-independent urate oxidase (UOX) is an ~137 kDa tetrameric enzyme essential for uric acid (UA) catabolism in many organisms. UA is first oxidized by O2 to dehydroisourate (DHU) via a peroxo intermediate. DHU then undergoes hydration to 5-hydroxyisourate (5HIU). At different stages of the reaction both catalytic O2 and water occupy the 'peroxo hole' above the organic substrate. Here, high-resolution neutron/X-ray crystallographic analysis at room temperature has been integrated with molecular dynamics simulations to investigate the hydration step of the reaction. The joint neutron/X-ray structure of perdeuterated Aspergillus flavus UOX in complex with its 8-azaxanthine (8AZA) inhibitor shows that the catalytic water molecule (W1) is present in the peroxo hole as neutral H2O, oriented at 45° with respect to the ligand. It is stabilized by Thr57 and Asn254 on different UOX protomers as well as by an O-H∙ ∙ ∙π interaction with 8AZA. The active site Lys10-Thr57 dyad features a charged Lys10-NH3+ side chain engaged in a strong hydrogen bond with Thr57OG1, while the Thr57OG1-HG1 bond is rotationally dynamic and oriented toward the π system of the ligand, on average. Our analysis offers support for a mechanism in which W1 performs a nucleophilic attack on DHUC5 with Thr57HG1 central to a Lys10-assisted proton-relay system. Room-temperature crystallography and simulations also reveal conformational heterogeneity for Asn254 that modulates W1 stability in the peroxo hole. This is proposed to be an active mechanism to facilitate W1/O2 exchange during catalysis

Nanoscale investigation of polymer cement concretes by small angle neutron scattering

An analysis of dense cements, such as polymer cement concrete, is made to produce original innovative components for different types of constructing materials. These materials present good functional properties (ageing resistance, crack formation resistance, hardness, and stability of mechanical modules) and can be used for various applications. In this paper, experimental tests on Portland cement with added γ-Al 2 O 3 and redispersible dry polymer performed using small angle neutron scattering are reported. The objective of the investigation was to assess the key parameters of the material (e.g., porosity, fractal dimensions, and size distribution) at the nanoscale level as well as to obtain useful structural information for expanding the possibility of applications. The results obtained can contribute to the optimisation of the consistency of the material, the design of operating conditions of elements of structures and facilities, and the design of the procedures that support ecological criteria and enhance quality and safety levels. © 2017 Walter de Gruyter GmbH, Berlin/Boston

Molecular simulations unravel the molecular principles that mediate selective permeability of carboxysome shell protein

Bacterial microcompartments (BMCs) are nanoscale proteinaceous organelles that encapsulate enzymes from the cytoplasm using an icosahedral protein shell that resembles viral capsids. Of particular interest are the carboxysomes (CBs), which sequester the CO 2 -fixing enzymes ribulose-1,5-bisphosphate carboxylase/oxygenase (Rubisco) to enhance carbon assimilation. The carboxysome shell serves as a semi-permeable barrier for passage of metabolites in and out of the carboxysome to enhance CO 2 fixation. How the protein shell directs influx and efflux of molecules in an effective manner has remained elusive. Here we use molecular dynamics and umbrella sampling calculations to determine the free-energy profiles of the metabolic substrates, bicarbonate, CO 2 and ribulose bisphosphate and the product 3-phosphoglycerate associated with their transition through the major carboxysome shell protein CcmK2. We elucidate the electrostatic charge-based permeability and key amino acid residues of CcmK2 functioning in mediating molecular transit through the central pore. Conformational changes of the loops forming the central pore may also be required for transit of specific metabolites. The importance of these in-silico findings is validated experimentally by site-directed mutagenesis of the key CcmK2 residue Serine 39. This study provides insight into the mechanism that mediates molecular transport through the shells of carboxysomes, applicable to other BMCs. It also offers a predictive approach to investigate and manipulate the shell permeability, with the intend of engineering BMC-based metabolic modules for new functions in synthetic biology

Structural Studies of Ferrofluids by Small-Angle Neutron Scattering

Abstract. The aim of this paper is to present method to investigate the properties of magnetic fluids by means of small angle neutron scattering. Ferrofluids are dispersions of small, single-domain magnetic particles suspended in a fluid carrier. The neutron scattering methods have been largely used the last two decades for the determination of structural properties of magnetic liquids at microscopic level. There can be investigated the structure of the particle, the aggregation phenomena, the magnetic liquid dynamics, particle-surfactant interaction, surfactant liquid-base interaction and structure, magnetic behavior of the samples. Experiments on small angle neutron scattering were carried out on SANS instrument YuMO in function at IBR-2 high-pulsed reactor at the Fran

Fermentation of Vaccinium floribundum Berries with Lactiplantibacillus plantarum Reduces Oxidative Stress in Endothelial Cells and Modulates Macrophages Function

Accumulating evidence suggests that high consumption of natural antioxidants promotes health by reducing oxidative stress and, thus, the risk of developing cardiovascular diseases. Similarly, fermentation of natural compounds with lactic acid bacteria (LAB), such as Lactiplantibacillus plantarum, enhances their beneficial properties as regulators of the immune, digestive, and cardiovascular system. We investigated the effects of fermentation with Lactiplantibacillus plantarum on the antioxidant and immunomodulatory effects of Pushgay berries (Vaccinium floribundum, Ericaceae family) in human umbilical vein endothelial cells (HUVECs) and macrophage cell line RAW264.7. Polyphenol content was assayed by Folin-Ciocalteu and HPLC-MS/MS analysis. The effects of berries solutions on cell viability or proliferation were assessed by WST8 (2-(2-methoxy-4-nitrophenyl)-3-(4-nitrophenyl)-5-(2,4-disulfophenyl)-2H-tetrazolium, monosodium salt and Lactate dehydrogenase (LDH) release, Trypan blue exclusion test, and Alamar blue assay. Antioxidant activity was evaluated by a cell-based chemiluminescent probe for the detection of intracellular H2O2 production in HUVECs. Heme oxygenase-1 (HO-1) expression levels were investigated by RT-qPCR. Glutathione reductase (GR), glutathione peroxidase (Gpx), superoxide dismutase (SOD), and catalase (CAT) activities, as markers of intracellular antioxidant defense, were evaluated by spectrophotometric analysis. The immunomodulatory activity was examined in RAW 264.7 by quantification of inducible nitric oxide synthase (iNOS) and Tumor Necrosis Factor-alpha (TNF alpha) by RT-qPCR. Data showed that fermentation of Pushgay berries (i) enhances the content of quercetin aglycone, and (ii) increases their intracellular antioxidant activity, as indicated by the reduction in H2O2-induced cell death and the decrease in H2O2-induced HO-1 gene expression in HUVECs treated for 24 h with fermented berries solution (10 mu g/mL). Moreover, treatment with Pushgay berries for 72 h (10 mu g/mL) promotes cells growth in RAW 264.7, and only fermented Pushgay berries increase the expression of iNOS in the same cell line. Taken together, our results show that LAB fermentation of Pushgay berries enhances their antioxidant and immunomodulatory properties

Brentuximab Vedotin with Chemotherapy for Stage III or IV Hodgkin's Lymphoma

Brentuximab vedotin is an anti-CD30 antibody-drug conjugate that has been approved for relapsed and refractory Hodgkin's lymphoma