bluuebunny/crossref_metadata_2025_split huggingface dataset:
Model Tests of Buoyant Force on Underground Structures
Authors: Ni Pengpeng , Kang Xin , Song Linhui , Mei Guoxiong , Zhao Yanlin 
Published: April 2018

Abstract
Conventionally, buoyant foundations are designed based on Archimedes’ principle, by which the buoyant force is computed by simply measuring the weight of groundwater that is displaced. However, soil at shallow depths is generally unsaturated and should be considered as a multiphase porous medium with heterogeneous properties. The efficacy of the Archimedes’ calculation of buoyant force is questionable because recent field evidence indicates that the measured buoyant force is actually much smaller, and the foundation design is always conservative. This article presents a series of model tests on shallow foundations embedded in different surrounding types of materials, such as pure water, clay, and sand to clay-sand composites. Both the transient and sustained hydrostatic uplift forces were measured. It has been demonstrated that the measured buoyant force increased with time and was always less than the theoretical value. A reduction coefficient was consequently suggested to scale down the Archimedes’ buoyant force for use in design. For shallow foundations in clay, a value of 0.3–0.4 should be used to evaluate the transient uplift force, and a higher value of 0.7–0.8 is recommended for the estimation of the steady-state buoyant force. For sand, the reduction coefficient varies between 0.85 and 0.95 for transient and sustained uplift conditions, respectively.
A MORAL E A POLÍTICA SOB A ÉGIDE DA NATUREZA OU NOS ANTÍPODAS DO UNIVERSAL
Authors: Paiva Rita 
Published: April 2018

Esse artigo visa problematizar a constituição da moral e da política, tal como fundamentadas por H. Bergson em sua última obra. Trata-se de compreender que essas dimensões da vida humana, ao menos enquanto tendências, mergulham suas raízes na natureza, o que eleva o propósito de conservação da espécie à condição de fim último da existir. Procura-se, assim, interrogar se com a atualização das virtualidades naturais que conformam a presença do homem no mundo, tanto a conduta moral quanto as ações políticas não findam por antagonizar com certos ideais instaurados no limiar da modernidade – e que, sob certas perspectivas, vicejam ainda no imaginário contemporâneo –, a saber: a expectativa de um progresso civilizatório pautado pela emancipação universal e pelo refluxo da violência.
Onde são/estão os ossos...
Authors: Peterson Michel , Peterson Christian 
Published: April 2018

O presente ensaio visual foi desenvolvido por Michel Peterson e Christian Peterson para a Revista Paralelo 31. As imagens e textos fizeram parte do conteúdo da Exposição Internacional no espaço expositivo A Sala, no Centro de Artes da UFPEL em maio de 2017. O ensaio propõe uma imersão numa pequena parte de conteúdo textual e imagético vasto, que já foi levantado pelo projeto de pesquisa do ROBAA (Roads of Bones And Ashes / A estrada dos ossos e das cinzas). Esta composição apresenta-se como um convite à reflexão, de uma perspectiva geopoética que, com grupo multidisciplinar, propõe problematizar os genocídios contemporâneos e seus apagamentos.Helene Sacco Where are/lie the bones...This visual essay was developed by Michel Peterson and Christian Peterson for the periodical Paralelo 31. The images and texts are from an international exhibition which took place at the gallery space A Sala, located at the Centro de Artes of the Federal University of Pelotas-UFPel, Brazil, in May of 2017. The visual essay proposes to immerse us in a small part of the vast pool of texts and images, which have been gathered through the research project ROBAA (Roads of Bones And Ashes ). This composition, presented as an invitation towards reflection that, with a multidisciplinary group, proposes to put a geopolitical perspective on contemporary genocydes and their obliteration.
HILDA HILST, FOTODOBRAGENS E CONTINUAÇÕES DO CORPO HILDA
Authors: Sbardelotto Diane , Zordan Paola 
Published: April 2018

Em uma residência artística realizadaem maio de 2017 na Casa do Sol, onde viveu e trabalhou a escritora Hilda Hilst, produziu-se trabalhos em arte que integram a pesquisa de Mestrado em Educação intitulada Fotodobragens para continuar o corpo, a qual articula o conceito deleuzo-foucaultiano de dobraem experimentações-continuidades do próprio corpo por meio de performances, fotografia e escrita. São feitas relações entre essa pesquisa acadêmico-poética em processo e o corpo na obra e na casa de Hilda Hilst, com enfoque em questões da subjetivação da mulher artista e nas práticas de si.HILDA HILST, PHOTOFOLDING AND CONTINUATIONS OF THE HILDA BODYAbstract: During an artist residency in May 2017 at the Casa do Sol, where the writer Hilda Hilst lived and worked, artworks were produced that are part of the Master's Research Project in Education entitled "Photofolding to continue the body", which articulates the Deleuzian-Foucauldian concept of the "fold" in experimentations-continuities of the body itself through performances, photography and writing. Here, relations are made between this academic poetic research in progress and the body in the works and in Hilda Hilst’s house, focusing on issues of the subjectification of women-artists and the practices of the self.
O CORPO-ARTE PERFORMATIVO: O UNIVERSO FEMININO COMPACTADO NA PÍLULA ANTICONCEPCIONAL
Authors: Matzenauer dos Santos Camila , Reis Biancalana Gisela 
Published: April 2018

O artigo proposto descreve o processo de criação de duas performances artísticas desenvolvidas por uma estudante de pós-graduação em artes visuais. As obras artísticas em questão tem o objetivo de abordar discussões socioculturais referentes ao feminino, mais especificamente acerca do consumo de pílulas anticoncepcionais. Os processos criadores das obras integram um projeto de mestrado com ênfase na área de Arte e Cultura, no qual a autora pesquisa relações entre o tempo e o feminino no contexto da arte contemporânea. Para esta reflexão, discutem-se autores como Glusberg, Bachelard e Cohen.THE PERFORMATIVE ART-BODY: THE FEMININE UNIVERSE SQUEEZED INTO A BIRTH CONTROL PILL Abstract: The paper describes the creative process of two performances developed by a graduate student in Visual Art. The artworks in question have the objective to discuss sociocultural references to the feminine, more precisely, about the consumption of birth control pills. The creative processes of the works are part of a Masters project, with emphasis in the area of art and culture, in which the artist researches relations between time and the feminine in the context of contemporary art. With respect to this reflection, we discuss authors such as Glusberg, Bachelard and Cohen.
PURIFICATION OF RAVE COMPLEX FROM Saccharomyces cerevisiae USING FLAG TAG-AFFINITY PURIFICATION METHOD
Authors: Thanh Trung Nguyen , Thi Tam Pham , Thi Thu Thuy Ta , Gu Chunyin , Zhang Zhenyu 
Published: April 2018

RAVE (Regulator of the H+-ATPase of the Vacuolar and Endosomal membranes) is an essential factor of assembly and reversible disassembly of V-ATPase. RAVE complex has three subunits, which are Rav1p, Rav2p and Skp1p. There are few studies on RAVE so it is very important to study structure of RAVE complex to understand more about the regulation of the assembly and reassembly at V-ATPase. In this study the RAVE complex was purified by affinity purification by fussing FLAG tag to subunit Rav1p or Rav2p. Experimental process: yeast cells were incubated in 8 L YEPD medium at 30 oC, 200 rpm (OD600nm around of 3). Furthermore harvested cells were broken by a French pressure cell disruptor at 25,000 p.s.i in TBSE (50 mM Tris/Cl, 150 mM NaCl, 1 mM EDTA, pH 7.4) with 1 mm PMSF. The cell lysate was centrifuged at 20,000 xg for 20 minutes at 4 oC. Then, the supernatant, was achieved by centrifugation, and loaded onto a small column contained 1 ml of anti-FLAG M2 gel. After washing anti-FLAG column with TBSE, RAVE complex was eluted with TBSE containing 100 µg/ml FLAG peptides. The results showed RAVE complex purification from strain with FLAG tag fused in C-terminus of Rav2 is better than RAVE complex purification from the yeast strain S. cerevisiae with FLAG tag fused in N-terminus of Rav1 or C-terminus of Rav1.
FATTY ACID COMPOSTION OF SELECTED VIETNAMESE BISCUITES INCLUDING TRANS-ISOMERS
Authors: Quoc Tuan Hoàng , Hong Son Vu , Thi Minh Tu Nguyen 
Published: April 2018

In this study, fatty acid compositions including trans-isomers contents of selected Biscuits products produced by Vietnamese confectionery companies and imported products purchased from Hanoi markets were determined by gas chromatography. Palmitic acid and oleic acid were the most abundant, with concentrations ranged from 21 % to 52 %, and 23 % to 43 %, respectively, and followed by linoleic acid, lauric acid, myristic acid. The saturated, cis-monounsaturated and cis-polyunsaturated fatty acid contents were within ranges of 37 % - 75 %, 18 % - 43 %, 0.4 – 26 % of total fatty acid methyl ester, respectively. Trans-fatty acids were identified in all samples excepted brands B3, B13, B17, B24*, and the contents ranged from 0.07 % to 7,16 %. A considerable variability in fatty acid composition of biscuits which indicated that different types of fats and oils were used for production of selected Vietnamese biscuits and imported products was showed by these results got from the study.
ADAPTIVE TRACKING CONTROL FOR TWIN ROTOR MULTIPLE-INPUT MULTIPLE-OUTPUT BASED ON ISS STABILIZATION
Authors: Chi Nguyen Van 
Published: April 2018

This paper proposes the angle tracking control method for Twin rotor multi-input multiple-output (TRMS) using the input-to-state stability theory (ISS) for nonlinear systems. To apply this theory, the model of TRMS is rewritten by an Euler-Lagrange forced model with uncertain parameters and input disturbances. The uncertain parameters are the potential energies depended on the mass of TRMS’parts and the input disturbances are considered the friction force, the flat cable force, the effects of the speed of the main rotor on the horizontal movement and the speed of tail rotor to the vertical movements. Using modificated model of TRMS, we design the adaptive controller for angle ISS stabilization to attenuate the influences of uncertain parameters and input disturbances to the angles of TRMS. The robustness of the closed system is shown by the the stabilization of the angles with the yaw and pitch external disturbances, the simulation and experimental results help to proof the rightness of proposed method.
EVALUATION OF PROBITOIC POTENTIAL OF LACTOBACILLUS STRAINS FROM FERMENTED FOODS AND FEACES OF INFANTS
Authors: My Le Nguyen Thi , Huong Nguyen Thi 
Published: April 2018

Lactobacillus strains are a major part of the probiotics, microflora of the intestine and of fermented foods. The aim of this study was to evaluate the potential probiotics of six Lactobacillus strains (L. fermentum 39-183; L. plantarum subsp.plantarum P-8; L. casei ATCC 334; L. rhamnosus ATCC 8530, L. brevis KB 290 and L. fermentum JMC 7776). Probiotic properties such as acid tolerance, bile resistance, bacteriocin-like activity, cell surface hydrophobicity and antibiotic resistance were assessed. In vitro results obtained showed that all Lactobacillus strains tested were able to meet the basic requirements for probiotic functions as they demonstrated probiotic characteristics such as tolerance to pH 2.0 and 2% bile salt. All Lactobacillus strains inhibited the growth of E. coli, Staphylococcus aureus and Salmonella Typhi. Among strains tested, L. plantarum subsp.plantarum P-8 showing inhibitory is very promising with inhibition zone ranging between 6.5 to 12.7 mm. The results for cell surface hydrophobicity and susceptibility against antibiotics also showed that L. fermentum JMC 7776 and L. plantarum subsp.plantarum P-8 had higher cell surface hydrophobicity than the rests. All Lactobacillus tested were resistant to vancomycin and susceptible to streptomycin. The results obtained in this investigation will be used to select potentially probiotic strains for in vivo study
ĐIỀU KHIỂN ON – OFF TRONG BÀI TOÁN DẦM CHỊU UỐN
Authors: Thăng Nguyễn Nhật 
Published: April 2018

Ứng dụng nguyên lí cực đại Pontryagin xác định quy luật biến đổi của mặt cắt ngang dầm chịu uốn dưới tác dụng của trọng lượng bản thân cho giá trị cực đại của mũi tên võng. Kết quả nghiên cứu cho thấy điều khiển thích hợp có dạng On – Off ứng với dầm có dạng bậc. Xác định điểm chuyển bậc và ảnh hưởng của tải đến vị trí điểm chuyển bậc đó.
NGHIÊN CỨU, LỰA CHỌN ĐIỀU KIỆN NUÔI CẤY VÀ LÊN MEN CHỦNG VI KHUẨN PSEUDOMONAS PUTIDA ĐỂ THU NHẬN ENZYME URICASE
Authors: Hà Phạm Thanh 
Published: April 2018

Trong nghiên cứu này những điều kiện nuôi cấy tối ưu cho sinh tổng hợp uricase của chủng Pseudomonas putida CN3 đã được đánh giá. Kết quả chỉ ra rằng nhiệt độ 30 ºC, pH môi trường ban đầu 8, tốc độ lắc 250 vòng/phút, thời gian nuôi cấy 48 giờ là cần thiết cho chủng CN3 sinh uricase tối đa. Axit uric 0,5 % là cơ chất cảm ứng tốt nhất, glucose 0,5 % và cao nấm men 0,3 % là nguồn cacbon và nitơ tốt nhất cho sản sinh uricase từ P. putida CN3. Chủng P. putida CN3 lên men trong điều kiện nuôi cấy tối ưu trên thiết bị lên men 5 L sản sinh uricase có hoạt độ tổng 1,21 U/ml, hoạt độ riêng 1,33 U/mg trong thời gian ngắn chỉ 30 giờ, vì vậy chủng này có tiềm năng ứng dụng cao. điều kiện nuôi cấy, lên men, Pseudomonas putida, uricase.
CHUYỂN BIẾN AUSFFERIT TRONG CÔNG NGHỆ CHẾ TẠO GANG CẦU TÔI ĐẲNG NHIỆT (ADI)
Authors: Dũng Nguyễn Hữu 
Published: April 2018

Gang cầu truyền thống chỉ có thể đạt được các chỉ tiêu cơ tính như : độ bền kéo 700 - 750 MPa; độ giãn dài: 2 – 5 %. Để đạt được các cơ tính cao hơn, tất nhiên là độ tin cậy của sản phẩm cũng cao hơn, cần phải kiểm soát các thông số như: thành phần hóa học của hợp kim, chất lượng vật đúc, cấu trúc graphit và quá trình nhiệt luyện. Bài báo này giới thiệu một phương pháp chế tạo gang cầu tôi đẳng nhiệt (ADI). Cấu trúc gang cầu ADI bao gồm pherit hình kim và austenit dư còn gọi là tổ chức ausferit. Cấu trúc này thể hiện sự kết hợp tuyệt vời về cơ tính: độ bền kéo 1200 MPa; độ giãn dài 7 – 8 %. Bài báo cũng sử dụng kết quả đo độ giãn nở nhiệt khi chuyển biến để tính toán các hệ số n và k trong phương trình Johnson–Mehl–Avrami và qua đó xây dựng giản đồ chuyển biến- nhiệt độ-thời gian. Cửa sổ quá trình trong trường hợp này được xác định là: tôi đẳng nhiệt ở 380 oC trong thời gian 2 giờ.
PARTITION OF POLYCYCLIC AROMATIC HYDROCARBONS IN WATER-SEDIMENT SYSTEM CONTAINING HUMIC ACID
Authors: Anh Van Dieu 
Published: April 2018

Natural dissolved organic matter (DOM) in the water environment has the potential to enhance the solubility of PAHs into the water phase, resulting in strong influence on their environmental fate. In this study, Nordic aquatic humic acid (HA) was used as a DOM. The effect of HA on the partition behaviour of PAHs in the sediment water system was examined by comparing the partition of three PAHs: Phenanthrene (Phe), Pyrene (Pyr), and Benzo[a]pyrene (BaP) in the water sediment system. An isotherm partition of PAHs between water and sediment was studied. The presence of HA in the sediment water system shifted the sediment water partition of PAHs to the water phase. The more hydrophobic the PAH was, the stronger the effect of HA on Kd was. Observed KDOM fitted well the linear free energy relationship. A three-phase partitioning model was established and successfully described the partition behavior of PAHs in water-sediment system.
ISOLATION, SCREENING AND THE INFLUENCE OF CULTIVATION FACTORS ON CELLULASE OF BACTERIA ISOLATED FROM TERMITES GUT
Authors: Nguyen Hien Thi 
Published: April 2018

From five termites guts samples collected in different places in Ha Noi and Vinh, 11 isolates which formed halo on agar plates with CMC were isolated. Among them strain G4 possessed the highest CMCase activity. Based on morphology and 16S rRNA gene sequences analysis, G4 was identified as Bacillus subtilis G4. The results from cultivation study revealed that M3 medium containing rice bran 1 %, soy flour 1 %, casein 1 % and 1 % NaCl was the best medium for cellulase production of B. subtilis G4. At optimal conditions for G4 which were inoculums ratio 1 %, cultivation temperature 37ºC, cultivation time 72 hours, shaking speed 150 rpm and initial pH medium 7, CMCase and FPase activity reached 3.36 U/ml and 0.35 U/ml, respectively.
COMPARISON OF RADICALS SCAVENGING ACTIVITY OF EXOPOLYSACCHARIDES FROM CULTURED CORDYCEPS SPP. ISOLATED IN VIET NAM
Authors: Ho Thi Phuong Tham 
Published: April 2018

Cordyceps is a well-known traditional medicine to heal various serious diseases for centuries. Besides, polysaccharides isolated from Cordyceps had demonstrated to exhibit potential bioactivities, especially antioxidant activity. Hence, this study concentrated on the antioxidant effects of exopolysaccharides (EPS) isolated from ten kinds of Cordyceps cultured broth. Consequently, Cordyceps sinensis cultured broth possessed the highest EPS as well as total carbohydrate content, but the nearly lowest protein content (2.75 g/l, 69.39 % and 1.01 % respectively). Most of EPSs exhibited potential radical - scavenging activities suggesting that EPSs would have been regarded as antioxidant resources. Nonetheless, the EPS from DL0067 possessed the highest ABTS radicals scavenging activity (IC50 value = 1026.70 ± 3.64 µg/ml) but low hydroxyl radicals scavenging activity (IC50 value > 5,000 µg/ml). The EPS from DL0075, in contrast, exhibited the highest hydroxyl radicals scavenging activity (IC50 value = 463.15 ± 26.19 µg/ml). All in all, the experiments were indicated higher antioxidant activities of EPS from Cordyceps isolated in Viet Nam than those from Cordyceps sinensis. These findings demonstrated that the antioxidant activities related to complexes of polysaccharides and proteins instead of only polysaccharide contents.
STUDY ON THE USE OF ACIDOPHILIC IRON OXIDIZING BACTERIA FOR DISSOLVING IRON FROM LOW-GRADED CHALCOPYRITE ORES
Authors: Hung Nguyen Van 
Published: April 2018

Biomining is a microbiological-based approach to extract minerals from ores without adding acids and other extraction chemicals. Having biological nature, the process is considered environmental friendly and tends to be applied more widely nowadays, especially for low-graded ores, for which chemical extraction is no longer efficient. In this study, two iron oxidizing bacterial strains Acidithiobacillus sp. IOB1 and Leptospirillum sp. IOB2 originated from mining sites in Vietnam were used in laboratory leaching experiments for the recovering minerals from low-graded chalcopyrite ores. The obtained results showed that both strains could significantly accelerate the leaching process, the highest iron dissolution rate was estimated for 0.83 g×kg-1×d-1 within two weeks of incubation with strain IOB2, about 30 % and 50 % respectively higher than leaching with strain IOB1 or control without bacteria, respectively. The iron extraction from ores was also evidenced by EDX analyses comparing the ore particles before and after incubation with the bacteria. Microscopic observation of DAPI-stained ore particles also showed high cell density attached to the particles, instead of freely moving in the liquid extract. Furthermore, FISH analyses using a specific probe for the g-Proteobacteria GAM42a revealed that only ~50 % of DAPI-stained cells were Acidithiobacillus sp. IOB1 – like in the leaching experiment with this train as starting culture, indicating that other bacterial species have developed and contributed to the metal dissolution here; however very rare positive signals were observed in leaching experiment with strain IOB2 as starting culture or the control without added bacteria. Thus, the acidophilic iron oxidizing strains Acidithiobacillus sp. IOB1 and Leptospirillum sp. IOB2 could serve as potential microbial sources for the development of biologically based approaches to extract minerals from ores, especially for those having low mineral contents.
STUDY ON TREATMENT TECHNOLOGY OF “TAO MEO” USING PECTINASE ENZYME IN “TAO MEO” VINEGAR PRODUCTION BY SUBMERGED METHOD
Authors: Viet Anh Nguyen Thi 
Published: April 2018

“Táo mèo” vinegar, a fat-burner famous for its many benefits for the digestive and immune systems, can be consumed as functional drinks. However, “táo mèo” vinegar is still producing mainly in manual-based, small-scaled with the surface fermentation method and containing many hazards. For industrial scales, the application of pectinase during the fruit extraction process has increased the quality of end-products and extraction efficiency, leaving no residue during storage. This research focus on the simultaneous application of two kinds of pectinase: PectinexUltra SP-L and PectinaseUltra Clear, during the extracted processing of “táo mèo”. The results indicated that simultaneously using both enzymes has increased the extractivity of the process to 25 %, and also has increased the amounts of function substances such as vitamin C, polyphenol, sugar, acid, and soluble pectin, compared to not using enzymes. The extractive process using the two enzymes for the fruit extracts is determined as follows: PectinexUltra SP-L is used at concentration of 0.15 %, temperature is 30 oC for 60 minutes; followed by using PectinaseUltra Clear with concentration of 0.1 %, temperature is 55 oC for 60 minutes. The enzyme processing does not interfere with the vinegar fermentation process; vinegar with enzyme pretreatment contains higher amounts of polyphenol, vitamin C, and potassium compared to that without enzyme pretreatment. The amount of soluble pectin in vinegar with enzyme pretreatment stays constant with no sediment during six months of storage, whereas vinegar without enzymes pretreatment produces precipitation afer two months of storage.
SOLVOTHERMAL SYNTHESIS OF BI2WO6 AND ITS PHOTOCATALYTIC ACTIVITY UNDER VISIBLE LIGHT IRRADIATION
Authors: Nguyen Trinh Duy 
Published: April 2018

Flower-like Bi2WO6 were successfully synthesized using the solvothermal method at different temperatures and characterized by XRD, FE-SEM, and DRS. We also investigated the photocatalytic activity of Bi2WO6 for the decomposition of rhodamine B under visible light irradiation. From XRD and SEM results, the reaction temperature has significant effects on the morphologies of the samples. From DRS results, Bi2WO6 samples displayed the absorption spectrum up to the visible region and then they showed the high photocatalytic activity under visible light irradiation, as a comparison with TiO2-P25.
INTEGRATED EVALUATION MODEL FOR SURFACE WATER QUALITY A CASE STUDY IN HO CHI MINH CITY, VIETNAM
Authors: Minh Nguyen Thu Thi 
Published: April 2018

The quality of water is a measure of a number of characteristics that impact on its condition. Parameters affecting the water quality are classified as having chemical, physical, biological and radiation characteristics. However there is uncertainty as to whether or not a water sample meets set standards in quality if two or more parameters need to be considered. Therefore, this study is to develop an effective evaluation model, adopting fuzzy logic, to assess the quality of water. Using a case study in Ho Chi Minh, Vietnam, a model has been developed and applied the collected surface water monitoring data in 2015. The results obtained from this model are then compared to the results gained from Vietnam national water quality index established in 2011.