cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Synthesis of zeolites from Tay Nguyen red mud and test of their adsorption ability
Creators: name: Pham, Thi Mai Hương
name: Tran, Hong Con
name: Le, Thi Phuong Quynh
Publisher: name: Journal of Vietnamese Environment
Year: 2018

description: Red mud is the waste from alumina production, contain high amount of residualalkaline,aluminateand some metals oxide such as iron oxide, siliconoxide, titanium oxide...; in which aluminum and silica proportions could be usedfor zeolite synthesis. The zeolite was synthesized by the hydrothermal method for obtaining RM-ZeO-Si which was signed for Si added and RM-ZeO- SiAl for both Si and Al added. The obtained zeolites were then characterized by the XRD, EDX, SEM, BET and FT-IR methods. The results indicate that the synthesized zeolite is likely the new kind one with one sulfur atom in the crystaline unit and has general formula of Na8(Al6Si6O24)S.4H2O. We tested the ability of ammonium and nitrite adsorption of the synthesized zeolites and found that the synthesized zeolites had very higha dsorption capacity of both cation ammonium and anionnitrite but the adsorption mechanism of each was different. Adsorption mechanism of ammonium was suggested as predominant ion exchange between ammonium cation in solution and sodium cation in zeolite crystals while nitrite adsorbed on surface material by electrostatic attractive force between nitrite anion and electropositive surface of iron oxide particles. Bùn đỏ là chất thải từ quá trình sản xuất nhôm, chứa lượng lớn kiểm, oxit nhôm và một số oxit khác như sắt oxit, silic oxit, titan oxit…trong đó tỷ lệ nhôm và silic có thể sử dụng để tổng hợp zeolit. Vật liệu zeolit được tổng hợp bằng phương pháp thủy nhiệt, thêm Si được ký hiệu là RM-ZeO-Si; vật liệu thêm đồng thời Si, Al được ký hiệu là RM- ZeO-Si/Al. Vật liệu zeolit tổng hợp được phân tích đặc trưng cấu trúc bằng các phương pháp XRD, EDX, SEM, BET và FT-IR. Các kết quả phân tích cho thấy vật liệu zeolit tổng hợp có điểm mới khác biệt so với các zeolit thông thường bởi trong cấu trúc phân tử có chứa nguyên tử S, công thức phân tử của zeolit là Na8(Al6Si6O24)S.4H2O. Kết quả khảo sát hấp phụ ban đầu cho thấy vật liệu có khả năng hấp phụ với cả ion amoni và nitrit, cơ chế hấp phụ khác nhau. Quá trình hấp phụ cation amoni là do quá trình trao đổi ion giữa cation amoni với cation natri trong tinh thể zeolit, còn quá trình hấp phụ nitrit trên bề mặt vật liệu do tương tác tĩnh điện giữa nitrit với các cấu tử oxit sắt.
description: Journal of Vietnamese Environment, Vol 9 No 1 (2018)
title: The Gallery Graves of Hesse and Westphalia: Expressions of different Identity (ies)?
Creators: name: Schierhold, Kerstin
Publisher: name: Journal of Neolithic Archaeology
Year: 2010

description: The concept of identity, in many aspects, has been intensively discussed for several years for its applicability in prehistoric archaeology. In this paper, I would like to try to take up some of these aspects with reference to the late Neolithic gallery graves of Hesse and Westphalia. Some selected facets are examined to enlighten distinct scales of identity: a structural analysis of building techniques, deposition of grave goods and burial rites together with their spatial distribution offers comparisons to coexistent neighbouring communities with collective burials. These comparisons finally may point out identity-forming features.
description: Journal of Neolithic Archaeology, 2010: Megaliths and Identities
Magneto Seebeck effect in REFeAsO (RE=rare earth) compounds: probing the magnon drag scenario
Creators: name: Caglieris, F.
name: Braggio, A.
name: Pallecchi, I.
name: Provino, A.
name: Pani, M.
name: Lamura, G.
name: Jost, A.
name: Zeitler, U.
name: Agliano, E. Galleani D
name: Manfrinetti, P.
name: Putti, M.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We investigate Seebeck effect in REFeAsO (RE=rare earth)compounds as a function of temperature and magnetic field up to 30T. The Seebeck curves are characterized by a broad negative bump around 50K, which is sample dependent and strongly enhanced by the application of a magnetic field. A model for the temperature and field dependence of the magnon drag contribution to the Seebeck effect by antiferromagnetic (AFM) spin fluctuation is developed. It accounts for the magnitude and scaling properties of such bump feature in our experimental data. This analysis allows to extract precious information on the coupling between electrons and AFM spin fluctuations in these parent compound systems, with implications on the pairing mechanism of the related superconducting compounds.
Second-order sufficient conditions for sparse optimal control of singular Allen--Cahn systems with dynamic boundary conditions
Creators: name: Sprekels, Jürgen
name: Tröltzsch, Fredi
Publisher: name: Weierstrass Institute
Year: 2023
Subjects: subject: Allen--Cahn equation
subject: phase field model
subject: dynamic boundary condition
subject: singular potential
subject: optimal control
subject: sparsity
subject: optimality conditions
subject: 35K20
subject: 35K55
subject: 49J50
subject: 49J52
subject: 49K2

description: In this paper we study the optimal control of a parabolic initial-boundary value problem of Allen--Cahn type with dynamic boundary conditions. Phase field systems of this type govern the evolution of coupled diffusive phase transition processes with nonconserved order parameters that occur in a container and on its surface, respectively. It is assumed that the nonlinear functions driving the physical processes within the bulk and on the surface are double well potentials of logarithmic type whose derivatives become singular at the boundary of their respective domains of definition. For such systems, optimal control problems have been studied in the past. We focus here on the situation when the cost functional of the optimal control problem contains a nondifferentiable term like the L1-norm leading to sparsity of optimal controls. For such cases, we derive second-order sufficient conditions for locally optimal controls.
Exploration of the Relationship Between Culture and Experience of Creativity at the Individual Level: A Case Study Based on Two Design Tasks
Creators: name: Gong, Zhengya
name: Nanjappan, Vijayakumar
name: Lee, Lik-Hang
name: Soomro, Sohail Ahmed
name: Georgiev, Georgi V.
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Science Policy
subject: Sociology
subject: FOS: Sociology
subject: Biological Sciences not elsewhere classified
subject: Developmental Biology

description: Extensive research has focused on the relationship between culture and creativity. However, related studies typically adopt national cultural values, set countries as independent variables to explore the relationship between culture and individuals’ creativity, or have inconsistent conclusions. Therefore, this study attempted to explore this relationship at the individual level in design processes from a phenomenological perspective, based on two design tasks carried out by 27 students at a university in China. The results showed a positive association between pleasure and long-term versus short-term orientation of individual cultural values in the two creative methods – 6-3-5 and collaborative sketching (C-sketch) – which were statistically significant. However, the correlation between enlightenment and long-term versus short-term orientation only existed in the 6-3-5 method. Based on the analysis, we found that an individual’s educational level affected their self-evaluation in the experience of creativity, and the 6-3-5 method was more favorable than the C-sketch method for the participants. Moreover, we developed a visualization framework and explained the relationship between culture and creativity based on the componential theory of creativity and Hofstede’s culture theory. Furthermore, the study might serve as a groundwork for further examination of the relationship between individuals’ culture and their experience of creativity.
Growth and metal uptake capacity of microalgae under exposure to chromium
Creators: name: Dao, Thanh Son
name: Le, Nguyen-Hong-Son
name: Vo, Minh-Tan
name: Vo, Thi-My-Chi
name: Phan, The-Huy
Publisher: name: Journal of Vietnamese Environment
Year: 2018

description: Microalgae play a key function in aquatic ecosystems. Their development and growth are strongly regulated by trace metals as essential elements. However, trace metals could cause negative effects when exceeding certain concentrations in the environment. In this study we tested the development and growth rate of two freshwater microalgae, the cyanobacterium Pseudanabeana mucicola and the green alga Pediastrum duplex, from Vietnam over the period of 14 days exposing to chromium (Cr) at the concentrations up to 1,936 µg L-1. Besides, the Cr uptake and absorption by P. mucicola were evaluated over 7 days incubated in medium containing 422 µg Cr L-1. The results showed that Cr at the concentrations up to 1,078 µg L-1 did not inhibit the development and growth rate of P. mucicola. Similarly, concentration of 224 µg Cr L-1 had no adverse effects on growth of P. duplex. The cyanobacterium P. mucicola could make a reduction up to 71% of Cr in the test medium, hence become a distinguished candidate for metal phytoremediation. To the best of our knowledge this is the first investigation on the responses and absorption of Cr by freshwater microalgae from Vietnam. Vi tảo đóng vai trò quan trọng trong hệ sinh thái thủy vực. Sự sinh trưởng và phát triển của chúng được điều tiết mạnh mẽ bởi kim loại vi lượng như những yếu tố thiết yếu. Tuy nhiên, những kim loại vi lượng này có thể gây ra những ảnh hưởng tiêu cực khi vượt quá nồng độ nhất định trong môi trường. Trong nghiên cứu này, chúng tôi thử nghiệm sự phát triển và tốc độ phát triển của hai loài vi tảo nước ngọt: loài tảo lam Pseudanabeana mucicola và loài tảo lục Pediastrum duplex có nguồn gốc từ Việt Nam trong thời gian 14 ngày phơi nhiễm với crôm (Cr) tại nồng độ lên tới 1.936 µg L-1. Bên cạnh đó, sự hấp thu Cr của P. mucicola cũng đã được đánh giá trong thời gian 7 ngày nuôi trong môi trường chứa 422 µg Cr L-1. Kết quả cho thấy Cr tại nồng độ lên tới 1.078 µg L-1 không kìm hãm sự phát triển và tốc độ sinh trưởng của P. mucicola. Tương tự, tại nồng độ 224 µg Cr L-1 không có bất kì ảnh hưởng tiêu cực đến sự phát triển của P. duplex. Loài tảo lam P. mucicola có thể làm giảm 71% hàm lượng Cr trong môi trường thí nghiệm, vì vậy được xem là ứng viên sáng giá cho quá trình xử lý môi trường ô nhiễm kim loại bằng thực vật . Theo hiểu biết của nhóm tác giả, đây là nghiên cứu đầu tiên về đáp ứng và hấp thu Cr bởi những vi tảo nước ngọt có nguồn gốc từ Việt Nam.
description: Journal of Vietnamese Environment, Vol 9 No 1 (2018)
Population synthesis of isolated Neutron Stars with magneto--rotational evolution
Creators: name: Gullón, Miguel
name: Miralles, Juan A.
name: Viganò, Daniele
name: Pons, José A.
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We revisit the population synthesis of isolated radio-pulsars incorporating recent advances on the evolution of the magnetic field and the angle between the magnetic and rotational axes from new simulations of the magneto-thermal evolution and magnetosphere models, respectively. An interesting novelty in our approach is that we do not assume the existence of a death line. We discuss regions in parameter space that are more consistent with the observational data. In particular, we find that any broad distribution of birth spin periods with $P_0\lesssim 0.5$ s can fit the data, and that if the alignment angle is allowed to vary consistently with the torque model, realistic magnetospheric models are favoured compared to models with classical magneto-dipolar radiation losses. Assuming that the initial magnetic field is given by a lognormal distribution, our optimal model has mean strength $\langle\log B_0{\rm [G]}\rangle \approx 13.0-13.2$ with width $σ(\log B_0) = 0.6-0.7$. However, there are strong correlations between parameters. This degeneracy in the parameter space can be broken by an independent estimate of the pulsar birth rate or by future studies correlating this information with the population in other observational bands (X-rays and $γ$-rays).
description: 10 pages, 9 figures, submitted and accepted to MNRAS, comments welcome
Additions to the genus Rhaphuma Pascoe, 1858 (Coleoptera: Cerambycidae: Cerambycinae: Clytini) from Vietnam
Creators: name: Cao, Thi Quynh Nga
name: Pham, Thi Nhi
name: Hoang, Vu Tru
name: Pham, Van Phu
name: Le, My Hanh
Publisher: name: Journal of Vietnamese Environment
Year: 2018

description: The paper presents a checklist of the genus Rhaphuma Pascoe, 1858 belonging to the tribe Clytini from Vietnam. Of the total 26 species, there were eight species newly recorded for the Vietnam’s fauna, viz. Rhaphuma anongi Gressitt et Rondon, 1970; Rhaphuma clarina Gressitt et Rondon, 1970; Rhaphuma constricta Gressitt et Rondon, 1970; Rhaphuma diana Gahan, 1906; Rhaphuma eleodina Gressitt et Rondon, 1970; Rhaphuma elongata Gressitt et Rondon, 1970; Rhaphuma minima Gressitt et Rondon, 1970 and Rhaphuma phiale Gahan, 1906. All species are presented with notes on distribution. Bài báo thống kê danh sách 26 loài thuộc giống Rhaphuma Pascoe, 1858, trong số đó có 8 loài là ghi nhận mới cho khu hệ Xén tóc của Vietnam, đó là: Rhaphuma anongi Gressitt et Rondon, 1970; Rhaphuma clarina Gressitt et Rondon, 1970; Rhaphuma constricta Gressitt et Rondon, 1970; Rhaphuma diana Gahan, 1906; Rhaphuma eleodina Gressitt et Rondon, 1970; Rhaphuma elongata Gressitt et Rondon, 1970; Rhaphuma minima Gressitt et Rondon, 1970; Rhaphuma phiale Gahan, 1906. Ngoài ra, bài báo còn cung cấp thông tin về phân bố của mỗi loàiở trong nước cũng như trên thế giới.
description: Journal of Vietnamese Environment, Vol 9 No 1 (2018)
T/B Scaling in beta-YbAlB4
Creators: name: Watanabe, Shinji
name: Miyake, Kazumasa
Publisher: name: arXiv
Year: 2014
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The scaling behavior over four decades of the ratio of temperature T to magnetic field B observed in the magnetization in beta-YbAlB4 is theoretically examined. By developing a theoretical framework that exhibits the quantum critical phenomena of Yb-valence fluctuations under a magnetic field, we show that the T/B-scaling behavior can appear near the quantum critical point of the valence transition. The emergence of the T/B scaling indicates the presence of the small characteristic energy scale of critical Yb-valence fluctuations. It is argued that the quantum valence criticality offers a unified explanation for the unconventional quantum criticality as well as the T/B scaling in beta-YbAlB4.
description: 12 pages, 2 figures
Isolation, characterization of Bacillus sp. producing heavy metal absorption γ-PGA
Creators: name: Nguyen, Sy Le Thanh
name: Kimura, Keitarou
name: Do, Thi Tuyen
name: Le, Thi Ngoc Anh
Publisher: name: Journal of Vietnamese Environment
Year: 2018

description: Poly-gamma-glutamic acid (γPGA), which is a biodegradable, non-immunogenic and unusual anionic amino-acid polymer consist of D- and L-glutamic acid units, was exploited for a wide array of useful applications. Bacillus are well known cellular system important for fermentation to synthesize γPGA, which is used as thickener, drugs carrier, cryoprotectant, humectant, biological adhesive, flocculants, or heavy metal absorbent. This study focused on the isolation of Bacillus spp. that is possible to produce γ-PGA from different soil samples from different places in Vietnam. Study the effect of precursors, temperature, carbon sources, times and pH on γ-PGA production. From 31 soil samples and 4 straws samples, strain 20.2 which produced the highest γ-PGA yields (riches 15.2 mg/ml), was identified as Bacillus sp. 20.2 by molecular biology method. The suitable conditions for growing of Bacillus sp. 20.2 strain to produce γ-PGA are at 37°C, pH 7 after 72 hours. Citric acid instead of glucose in a GSP medium is better for producing γ-PGA by strain Bacillus sp. 20.2. Poly-gamma-glutamic acid (γ-PGA) là một polymer amino-acid gồm D và L-glutamic acid, có khả năng phân hủy sinh học, không gây miễn dịch, đã được ứng dụng rộng rãi trong công nghiệp, y học. Bacillus subtilis được biết đến là hệ thống tế bào ý nghĩa quan trọng trong quá trình lên men để tổng hợp γ-PGA. γ-PGA hòa tan trong nước, phân hủy sinh học và không độc đối với con người và môi trường. γ-PGA ổn định với nhiều protease vì các protease thường không nhận acid γ-glutamic (Obst et al., 2004). γ-PGA có cấu trúc đồng phân đơn giản, không gây miễn dịch. Do đó, γ-PGA đã được quan tâm ứng dụng trong các lĩnh vực như y học, công nghiệp thực phẩm, mỹ phẩm và đặc biệt là xử lý nước nhiễm kim loại nặng. Trong nghiên cứu này chúng tôi tập trung phân lập, tuyển chọn các chủng Bacillus có khả năng sinh tổng hợp PGA cao. Sau đó định danh và đánh giá khả năng sinh tổng hợp PGA từ chủng đã phân lập được. Kết quả cho thấy từ 34 mẫu rơm và đất, chúng tôi đã phân lập được chủng với mã số 20.2 có khả năng sinh PGA cao nhất đạt 15.2 mg/ml. Chủng này đã được định danh bằng phân tích trình tự gene 16S rRNA và thuộc loài Bacillus sp. Môi trường thích hợp sinh tổng hợp PGA là GSP ở điều kiện 37oC pH7 sau 72 giờ nuôi cấy.
description: Journal of Vietnamese Environment, Vol 9 No 1 (2018)
Red River Basin Above Denison Dam, Main Report: Cooperative River Basin Survey
Creators: name: United States Department Of Agriculture (Economic Research Service, Soil Conservation Service, Forest Service)
name: United States Department Of Agriculture (Economic Research Service, Soil Conservation Service, Forest Service)
Publisher: name: Unknown
Year: 1977
Subjects: Agricultural and Food Policy
Community/Rural/Urban Development
Crop Production/Industries
Environmental Economics and Policy
Labor and Human Capital
Land Economics/Use
Livestock Production/Industries
Productivity Analysis
Research Methods/ Statistical Methods
Resource /Energy Economics and Policy

description: Excerpts from the report: The Red River Basin Above Denison Dam extends from eastern New Mexico across the Texas Panhandle and southwestern Oklahoma to Denison Dam on the Oklahoma-Texas boundary. It embraces an area of 25,393,890 acres. The area of the Red River Basin Above Denison Dam is distributed in the three states as follows: Texas 14,225,400 acres, Oklahoma 10,743,890 acres, and New Mexico 424,600 acres. A small portion of the basin boundary extends into New Mexico. Program opportunities for the portion of the basin which lies in New Mexico have not been included. Problems associated with flooding, sediment, irrigation, and the component needs of the basin were studied separately in Texas and Oklahoma. The objective of this study was to facilitate and coordinate the orderly conservation, development, utilization, and management of water and land resources. The patterns of water and land use to meet needs for 2000 and 2020 are described. Also specific watershed projects necessary to meet local and national social and economic needs are proposed. The consequences of alternative patterns and schedules of development were evaluated.
description: This study was made under the authority of Section 6 of the Watershed Protection and Flood Prevention Act (Public Law 83-566, as amended). By this act the Secretary of Agriculture is authorized to cooperate with other Federal and with State and local agencies to make investigations and surveys of the watersheds of rivers and other waterways as a basis for the development of coordinated programs. In 1970 and 1971, the U. S. Department of Agriculture received requests from the Oklahoma Conservation Commission, the Oklahoma Water Resources Board, the Texas Water Development Board, the Texas State Soil and Water Conservation Board, and the Texas Water Rights Commission to participate in a cooperative study of the Red River Basin Above Denison Dam. The above agencies were sponsors of this study.
On Characterizing weak defining hyperplanes (weak Facets) in DEA with Constant Returns to Scale Technology
Creators: name: Akbarian, Dariush
Publisher: name: arXiv
Year: 2014
Subjects: subject: Optimization and Control (math.OC)
subject: FOS: Mathematics
subject: H.5.5
subject: 90B99

description: The Production Possibility Set (PPS) is defined as a set of inputs and outputs of a system in which inputs can produce outputs. The Production Possibility Set of the Data Envelopment Analysis (DEA) model is contain of two types defining hyperplanes (facets); strong and weak efficient facets. In this paper, the problem of finding weak defining hyperplanes of the PPS of the CCR-technology is dealt with. We state and prove some properties relative to our method. To illustrate the applicability of the proposed model, some numerical examples are finally provided. Our algorithm can easily be implemented using existing packages for operation research, such as GAMS.
description: 38 pages; 5 figures
The potential of culinary herbs and spices from the genera Curcuma and Zingiber in the management of type 2 diabetes mellitus and Alzheimer’s disease
Creators: name: Sivasothy, Yasodha
name: Sundralingam, Usha
name: Goh, Asly Poh-Tze
name: Men, Toh Kar
name: Min, Kelvin Voon Jian
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Medicine
subject: Pharmacology
subject: Chemical Sciences not elsewhere classified
subject: Ecology
subject: FOS: Biological sciences
subject: Cancer
subject: Science Policy
subject: Computational Biology

description: The consumption of culinary herbs and spices in our daily dietary intake has been known to reduce the risk of developing chronic diseases. The efficacy of these seasoning agents towards preventing or alleviating chronic diseases is facilitated through the synergistic effect of their secondary metabolites. A majority of the scientific reviews which have been conducted till present emphasise that the positive effects of culinary herbs and spices on human health is predominantly due to the presence of dietary polyphenols. This review however will focus on the therapeutic benefits of essential oils of culinary herbs and spices from the genera Curcuma and Zingiber in the management of Type 2 Diabetes Mellitus and Alzheimer’s Disease.
Geometry of Lie integrability by quadratures
Creators: name: Cariñena, J. F.
name: Falceto, F.
name: Grabowski, J.
name: Rañada, M. F.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Mathematical Physics (math-ph)
subject: Classical Analysis and ODEs (math.CA)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 37J35, 34A34, 34C15, 70H06

description: In this paper we extend the Lie theory of integration in two different ways. First we consider a finite dimensional Lie algebra of vector fields and discuss the most general conditions under which the integral curves of one of the fields can be obtained by quadratures in a prescribed way. It turns out that the conditions can be expressed in a purely algebraic way. In a second step we generalize the construction to the case in which we substitute the Lie algebra of vector fields by a module (generalized distribution). We obtain much larger class of integrable systems replacing standard concepts of solvable (or nilpotent) Lie algebra with distributional solvability (nilpotency).
description: 18 pages
Investigation on effects of walnut essential oil against glutamate toxicity on cortex neuron and LN405 cancer cell lines, diabetes, and some microorganisms
Creators: name: Yesilyurt, Fatma
name: Yuca, Hafize
name: Karakaya, Songul
name: Tekman, Enes
name: Demirci, Betul
name: Taghizadehghalehjoughi, Ali
name: Göger, Gamze
name: Şahinöz, Muhammed Ziya
name: Nobarirezaeyeh, Mohaddeseh
name: Hacimuftuoglu, Ahmet
name: Güvenalp, Zühal
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Biochemistry
subject: Microbiology
subject: FOS: Biological sciences
subject: Cell Biology
subject: Neuroscience
subject: Environmental Sciences not elsewhere classified
subject: Chemical Sciences not elsewhere classified
subject: Biological Sciences not elsewhere classified

description: In this study, leaf essential oil effects on glutamate toxicity model formed in cortex neurons and LN405 cell cultures were investigated. Antidiabetic activity was evaluated by α-amylase and α-glucosidase inhibitions. MIC was used for antimicrobial activity. Seven groups were examined with MTT. Glutamate 10-5 mM in cortex showed 62% viability whereas oil viability did not increase in a dose-dependent manner and the highest viability rate was observed. There are four types of glandular trichomes in leaf anatomy of walnut. The oil exhibited half as much α-glucosidase inhibitory activity with an IC50 value of 8105 μg/mL, compared to positive control acarbose (IC50 = 4762 μg/mL). MIC of oil was determined to be 625 μg/mL against E. coli, C. albicans, and C. parapsilosis, whereas S. aureus exhibited a MIC of 1250 μg/mL. Major compounds of oil were found as β-pinene (17.6%), α-pinene (11.3%), β-eudesmol (8.6%), and caryophyllene oxide (6.2%).
Solution of the Voter Model by Spectral Analysis
Creators: name: Pickering, William
name: Lim, Chjan
Publisher: name: arXiv
Year: 2014
Subjects: subject: Probability (math.PR)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: An exact spectral analysis of the Markov Propagator for the Voter model is presented for the complete graph, and extended to the complete bipartite graph and uncorrelated random networks. Using a well-defined Martingale approximation in diffusion-dominated regions of phase space, which is almost everywhere for the Voter model, this method is applied to compute analytically several key quantities such as exact expressions for the $m$ time step propagator of the Voter model, all moments of consensus times, and the local times for each macrostate. This spectral method is motivated by a related method for solving the Ehrenfest Urn problem and by formulating the Voter model on the complete graph as an Urn model. Comparisons of the analytical results from the spectral method and numerical results from Monte-Carlo simulations are presented to validate the spectral method.
description: 11 Pages, 6 figures
Growth of duckweed upon exposure to aluminum and atrazine in the laboratory conditions
Creators: name: Vo, Thi My Chi
name: Dao, Minh Phap
name: Dao, Thanh Son
Publisher: name: Journal of Vietnamese Environment
Year: 2018

description: The trace metals and pesticides are commonly found in surface water receiving industrial and agricultural effluents. However, the potential negative effects of these compounds on aquatic ecosystems have not been deeply studied. Hence, the aim of this study is to assess the single and combined effects of aluminum (Al) and atrazine on the development and growth rate of duckweed, Lemna minor L. The single exposures were implemented with either Al or atrazine at the concentration of 5, 50 and 500 µg L-1 and a binary exposure was conducted with 50 µg L-1 of Al and 5 µg L-1 of atrazine for two weeks. The results revealed that both Al and atrazine at the concentration of 500 µg L-1 strongly inhibited the development and growth rate of the duckweed. On the contrary, the mixture of Al and atrazine showed antagonistic effects on the plant. To our knowledge, this is the first report on the combined effects of these two contaminants on the duckweed. Therefore, our results could be useful for environmental managers in setting up and adjusting the safe guideline values in Vietnam for Al and atrazine in natural waters in term of ecological health protection. Kim loại nặng và thuốc trừ sâu thường được tìm thấy trong các nguồn nước mặt, nơi tiếp nhận nước thải công nghiệp và nông nghiệp. Tuy nhiên, những ảnh hưởng tiềm tàng mang tính tiêu cực của những hợp chất này đối với hệ sinh thái thủy vực chưa được nghiên cứu đầy đủ. Do đó, mục tiêu của nghiên cứu này nhằm đánh giá những ảnh hưởng riêng lẻ và kết hợp của nhôm (Al) và atrazine lên sự phát triển và tốc độ sinh trưởng của bèo tấm, Lemma minor L. Sự phơi nhiễm riêng lẻ với Al hoặc atrazine được thực hiện ở các nồng độ 5, 50 và 500 µg L-1, trong khi đó, quá trình phơi nhiễm kết hợp được tiến hành với Al tại nồng độ 50 µg L-1 và atrazine tại nồng độ 5 µg L-1 trong hai tuần. Kết quả cho thấy cả Al và atrazine ở nồng độ phơi nhiễm 500 µg L-1 kìm hãm mạnh mẽ sự phát triển và tốc độ sinh trưởng của bèo tấm. Ngược lại, sự kết hợp Al và atrazine dẫn kết tác động triệt tiêu trên bèo tấm. Theo sự hiểu biết của chúng tôi, đây là ghi nhận đầu tiên về những ảnh hưởng kết hợp của hai chất gây ô nhiễm này lên bèo tấm. Vì vậy, những kết quả này có thể hữu ích cho các nhà quản lý môi trường tại Việt Nam trong việc thiết lập và điều chỉnh các giá trị an toàn đối với Al và Atrazie trong môi trường nước tự nhiên về khía cạnh bảo vệ sức khỏe sinh thái.
description: Journal of Vietnamese Environment, Vol 9 No 2 (2018)
Report on the Water and Related Land Resources, Blackwater-Lamine River Basin, Missouri
Creators: name: Economic Research Service
name: Service, Forest
name: Soil Conservation Service
name: State Of Missouri
name: Economic Research Service
name: Service, Forest
name: Soil Conservation Service
name: State Of Missouri
Publisher: name: Unknown
Year: 1977
Subjects: Agricultural and Food Policy
Community/Rural/Urban Development
Crop Production/Industries
Environmental Economics and Policy
Labor and Human Capital
Land Economics/Use
Livestock Production/Industries
Productivity Analysis
Research Methods/ Statistical Methods
Resource /Energy Economics and Policy

description: Excerpts from the report: The Blackwater-Lamine River Basin, encompassing 1,702,300 acres or 2659.84 square miles in eight counties, is 3.8 percent of the state, and has an average length of 65 miles and a width of 40 miles. It is located south of the Missouri River in west-central Missouri, and is part of Sub-Region 8, Missouri River Basin. The basin divides into two major subbasins, the Blackwater River having a drainage area of 991,600 acres or 1549.33 square miles and the Lamine River having a drainage area of 710,700 acres or 1110.51 square miles. The basin is primarily an agricultural area with a total population of 107,000. The broad objective of this study is to provide information needed by decision makers for the orderly conservation, development, management and utilization of the water and land resources. The State of Missouri objectives included the following: the conservation, development, management and use of water and land resources to meet seasonal and long-range requirements; contribute to the local economic base; implementation for recreation experience; retention of historic uniqueness and apply the multiple use concept to serve the greatest number of people. During the study, Principles and Standards were developed by the U.S. Water Resource Council. To the extent possible, this new policy was used as illustrated by the displays of three alternative plans and the evaluations using the 4 account system.
description: This cooperative study was made under the authority of Section 6 of the Watershed Protection and Flood Prevention Act--Public Law 83-566, as amended in response to a request by the Governor of Missouri dated February 7, 1967. Participation within the USDA was by the Economic Research Service, Forest Service and Soil Conservation Service. Participation by the State of Missouri was through the Divisions of the Missouri Department of Natural Resources and the Missouri Department of Conservation.
title: Das Galeriegrab Calden I
Creators: name: Dirk Raetzel-Fabian
Publisher: name: Journal of Neolithic Archaeology
Year: 2012

description: 1948 entdeckt, spielte die Anlage aufgrund der spärlichen keramischen Funde und der scheinbaren isolierten Lage zwischen den Verbreitungszentren der Wartbergkultur bei Fritzlar und Warburg in der Forschung zunächst keine größere Rolle. Im Rahmen des Calden-Projektes wurden Befunde und Fundmaterial erneut analysiert sowie 14C-Daten am Knochenmaterial veranlaßt. Calden I ist heute ein wichtiger Baustein für das Verständnis der älteren Wartbergkultur.
description: Journal of Neolithic Archaeology, 1999: Calden
Für Erneuerung und klare Verhältnisse in der Kirchenleitung
Creators: name: Queiroz, Antônio Celso
Publisher: name: Concilium
Year: 1970

description: Concilium, Bd. 49 Nr. 5 (2013): Concilium: Internationale Zeitschrift für Theologie, Band 49, Heft 5
Screening bacterial strains for production of maltooligosyl trehalose trehalohydrolase and maltooligosyl trehalose synthase
Creators: name: Nguyen, Thi Hien Trang
name: Nguyen, Thi Thao
name: Le, Thanh Hoang
name: Nguyen, Thi Anh Tuyet
name: Nguyen, Manh Dat
name: Le, Duc Manh
name: Do, Thi Tuyen
Publisher: name: Journal of Vietnamese Environment
Year: 2018

description: Maltooligosyl trehalose synthase (MTSase, EC 5.4.99.15) catalyzes the synthesis of maltooligosyl trehalose by converting the of α (1 → 4) glucosidic linkages on the reducing ends of maltooligosaccharides to α (1 →1) glucosidic linkages. Maltooligosyl trehalose trehalohydrolase (MTHase, EC 3.2.1.141) catalyzes the release of trehalose by cleaving the α-1.4-glucosidic linkage next to the α-1.1-linked terminal disaccharide of maltooligosyl trehalose. Trehalose was synthesized from starch by the cooperative action of these two enzymes. Trehalose is of great interest in many industrial ﬁelds. Until now, many studies have been performed to develop effective methods of trehalose production. This research focused on screening strains bacteria were able to produce of trehalose from starch which is novel and economic method for trehalose production. We selected two strains that had MTSase and MTSase strong activity from ten strains that were isolated in Vietnam. Maltooligosyl trehalose synthase (MTSase, EC 5.4.99.15) xúc tác cho phản ứng phân hủy maltooligosaccharide thành maltooligosyl trehalose bằng chuyển đổi glycosyl hóa nội phân tử sau đó maltooligosyl trehalose trehalohydrolase (MTHase, EC 3.2.1.141) thủy phân đặc hiệu maltooligosyl trehalose thành trehalose. Phương pháp sản xuất trehalose từ tinh bột bằng cách sử dụng MTSase và MTHase có tiềm năng ứng dụng trên quy mô lớn với một chi phí khả thi để có thể thương mại hóa sử dụng cho ngành công nghiệp thực phẩm. Trong nghiên cứu này chúng tôi sàng lọc khả năng sản xuất trehalose của 10 chủng vi khuẩn từ đó chọn ra hai chủng có hoạt tính MTSase và MTHase xúc tác cho phản ứng tạo trehalose từ tinh bột tan.
description: Journal of Vietnamese Environment, Vol 9 No 2 (2018)
Bi-Local Field in Gravitational Shock Wave Background
Creators: name: Kanda, Naohiro
name: Naka, Shigefumi
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The particles with almost light velocity are able to be sources of the shock-wave gravity (SWG). Then, for ultra-high-energy particles, there exist two-body scatterings such that one particle is scattered from the gravitational background produced by another particle. Since the spacetime of SWG is closely related to a pp-wave solution of AdS-type background, this type of interaction is also interesting in AdS dual gauge theories. From those viewpoints, the scattering of point particles or strings by the SWG were studied. In this paper, we study the case of the bi-local models, which are simple relativistic bound systems having a close relation with specific modes of open strings. In particular, we analyze the bound-state effect on the scattering amplitudes, which describe the interaction between this model and SWG.
description: 12pages, 0figures
Exact ferromagnetic ground state of pentagon chains
Creators: name: Gulacsi, Miklos
name: Kovacs, Gyorgy
name: Gulacsi, Zsolt
Publisher: name: arXiv
Year: 2014
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We model conducting pentagon chains with a multi orbital Hubbard model and prove that well below half filling exact ferromagnetic ground states appear. The rigorous method we use is based on the transformation of original hamiltonian into positive semidefinite form. This technique is independent of the spatial dimesion and does not require integrability of the model. The obtained ferromagnetism is connected to dispersionless bands but in a much broader sense than flat band ferromagnetism requires, where on every site a Hubbard term is present. In our case only a small percentage of, even randomly distributed, sites are only interacting.
description: 12 pages, 2 figures
Evidence of the Evolved Nature of the B[e] Star MWC 137
Creators: name: Muratore, M. F.
name: Kraus, M.
name: Oksala, M. E.
name: Arias, M. L.
name: Cidale, L.
name: Fernandes, M. Borges
name: Liermann, A.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The evolutionary phase of B[e] stars is difficult to establish due to the uncertainties in their fundamental parameters. For instance, possible classifications for the Galactic B[e] star MWC 137 include pre-main-sequence and post-main-sequence phases, with a large range in luminosity. Our goal is to clarify the evolutionary stage of this peculiar object, and to study the CO molecular component of its circumstellar medium. To this purpose, we modeled the CO molecular bands using high-resolution K-band spectra. We find that MWC 137 is surrounded by a detached cool (T = 1900 +-100 K) and dense (N = (3 +- 1) x 10^21 cm^(-2)) ring of CO gas orbiting the star with a rotational velocity, projected to the line of sight, of 84 +- 2 km/s. We also find that the molecular gas is enriched in the isotope 13C, excluding the classification of the star as a Herbig Be. The observed isotopic abundance ratio (12C / 13C = 25 +- 2) derived from our modeling is compatible with a proto-PN, main-sequence or supergiant evolutionary phase. However, based on some observable characteristics of MWC 137, we propose that the supergiant scenario seems to be the most plausible. Hence, we suggest that MWC 137 could be in an extremely short-lived phase, evolving from a B[e] supergiant to a blue supergiant with a bipolar ring nebula.
description: 17 pages, 5 figures; accepted for publication in AJ
Binary evolution using the theory of osculating orbits: conservative Algol evolution
Creators: name: Davis, P. J.
name: Siess, L.
name: Deschamps, R.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Our aim is to calculate the evolution of Algol binaries within the framework of the osculating orbital theory, which considers the perturbing forces acting on the orbit of each star arising from mass exchange via Roche lobe overflow (RLOF). The scheme is compared to results calculated from a `classical' prescription. Using our stellar binary evolution code BINSTAR, we calculate the orbital evolution of Algol binaries undergoing case A and case B mass transfer, by applying the osculating scheme. The velocities of the ejected and accreted material are evaluated by solving the restricted three-body equations of motion, within the ballistic approximation. This allows us to determine the change of linear momentum of each star, and the gravitational force applied by the mass transfer stream. Torques applied on the stellar spins by tides and mass transfer are also considered. Using the osculating formalism gives shorter post-mass transfer orbital periods typically by a factor of 4 compared to the classical scheme, owing to the gravitational force applied onto the stars by the mass transfer stream. Additionally, during the rapid phase of mass exchange, the donor star is spun down on a timescale shorter than the tidal synchronization timescale, leading to sub-synchronous rotation. Consequently, between 15 and 20 per cent of the material leaving the inner-Lagrangian point is accreted back onto the donor (so-called `self-accretion'), further enhancing orbital shrinkage. Self-accretion, and the sink of orbital angular momentum which mass transfer provides, may potentially lead to more contact binaries. Even though Algols are mainly considered, the osculating prescription is applicable to all types of interacting binaries, including those with eccentric orbits.
description: A&A in press. Minor typos corrected
Composting of cow manure and rice straw with cow urine and its influence on compost quality
Creators: name: Nguyen, Thanh Phong
name: Nguyen, Thi Ngoc Quynh
Publisher: name: Journal of Vietnamese Environment
Year: 2018

description: The aim of this study was to assess the effect of composting process of cow manure and rice straw with application of cow urine and to evaluate the quality of composting products. There were two treatment piles, in which one pile was applied with cow urine every week and another pile without urine application. Each pile was set up by one tone cow manure and 500kg rice straw. The piles were half-covered by plastic foil to protect from rain and turned one a week. The composting duration lasted 8 weeks. The parameters such as temperature, pH, DM, density and nitrogen were monitored and observed during the 8-week period. The results showed that there was a significant difference in temperature, compost quality and duration between two piles with and without cow urine application. The application of cow urine increased significant nitrogen and phosphorous content and shortened the composting process. This study recommends that cow urine should be applied for composting process of cow manure and rice straw in order to increase the quality of compost. The final product was in the range of matured compost level and can be used directly for agriculture crop. Mục tiêu của nghiên cứu nhằm đánh giá ảnh hưởng đến chất lượng phân compost của việc bổ sung nước tiểu vào trong quá trình ủ phân từ nguyên liệu phân bò và rơm rạ. Thí nghiệm được thực hiện trên hai đống ủ phân, một đống ủ được bổ sung nước tiểu bò hàng tuần và một đống ủ không bổ sung nước tiểu bò như là một nghiệm thức đối chứng. Mỗi đống ủ được trộn 1 tấn phân bò và 500kg rơm. Đống ủ phân được đậy kín một nửa phía trên nhằm ngăn cản ảnh hưởng của mưa và được đảo trộn một lần mỗi tuần. Quá trình thí nghiệm được tiến hành trong 8 tuần. Các chỉ tiêu như nhiệt độ, pH, DM, mật độ và chất dinh dưỡng Nitơ và Phốt Pho được quan trắc trong thời gian ủ. Kết quả cho thấy có sự khác biệt đáng kể giữa hai đống phân ủ đối với các chỉ tiêu như nhiệt độ, chất lượng phân compost và thời gian ủ. Đống ủ phân có bổ sung nước tiểu có hàm lượng Nitơ và Phốt pho cao hơn và thời gian ủ ngắn hơn. Kết quả nghiên cứu khuyến cáo nên bổ sung nước tiểu bò cho quá trình ủ phân compost nhằm tăng hàm lượng chất dinh dưỡng cho sản phẩm phân compost. Sản phẩm sau quá trình ủ đạt mức độ phân hữu cơ và có thể sử dụng cho cây trồng.
description: Journal of Vietnamese Environment, Vol 9 No 2 (2018)
Correlations across horizons in quantum cosmology
Creators: name: Alonso-Serrano, Ana
name: Garay, Luis J.
name: Marugan, Guillermo A. Mena
Publisher: name: arXiv
Year: 2014
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Different spacetime regions separated by horizons are not related to each other. We know that this statement holds for classical spacetimes. In this paper we carry out a canonical quantization of a Kantowski-Sachs minisuperspace model whose classical solutions exhibit both an event horizon and a cosmological horizon in order to check whether the above statement also holds from the quantum gravitational point of view. Our analysis shows that in fact this is not the case: Quantum gravitational states with support in spacetime configurations that exclusively describe either the region between horizons or outside them are not consistent in the sense that there exist unitary operators describing a natural notion of evolution that connect them. In other words, unitarity is only preserved in this quantization when dealing with the whole spacetime and not in each region separately.
description: 10 pages, 5 figures
Der römische Primat, die Gemeinschaft der Kirchen und die Gemeinschaft der Bischöfe
Creators: name: Legrand, Hervé
Publisher: name: Concilium
Year: 1970

description: Concilium, Bd. 49 Nr. 5 (2013): Concilium: Internationale Zeitschrift für Theologie, Band 49, Heft 5
A Study of the relation between intensity oscillations and magnetic field parameters in a Sunspot: Hinode Observations
Creators: name: Bayanna, Ankala Raja
name: Mathew, Shibu K
name: Kumar, Brajesh
name: Louis, Rohan E
name: Venkatakrishnan, Parameswaran
Publisher: name: arXiv
Year: 2014
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present properties of intensity oscillations of a sunspot in the photosphere and chromosphere using G~band and CaIIH filtergrams from Hinode. Intensity power maps as function of magnetic field strength and frequency reveal reduction of power in Gband with increase in photospheric magnetic field strength at all frequencies. In CaIIH, however, stronger fields exhibit more power at high frequencies particularly in the 4.5 mHz-8.0 mHz band. Power distribution in different locations of the active region show that the oscillations in CaIIH exhibit more power in comparison to that of Gband. We also relate the power in intensity oscillations with different components of the photospheric vector magnetic field using near simultaneous spectro-polarimetric observations of the sunspot from the Hinode spectropolarimeter. The photospheric umbral power is strongly anti-correlated with the magnetic field strength and its the line-of-sight component while there is a good correlation with the transverse component. A reversal of this trend is observed in the chromosphere with the exception at low frequencies ($ν\le$ 1.5 mHz). The power in sunspot penumbrae is anti-correlated with the magnetic field parameters at all frequencies (1.0 $\leν\le$ 8.0 mHz) in both the photosphere and chromosphere, except that the chromospheric power shows a strong correlation in the frequency range 3-3.5 mHz.
description: Accepted for publication in the journal "Research in Astronomy and Astrophysics (RAA)"