bluuebunny/crossref_metadata_2025 huggingface dataset:
城镇化进程中的农田水利设施建设与管理研究
Authors: 买买提 努尔古丽 •
Published: July 2020

随着我国经济的不断发展,现代人群对于物质生活有了更高的追求,这种现象导致我国无论是在进行经济建设还是生活中都忽略了对生态环境的保护,各种各样的自然灾害引起了现代人群对于农田水利工程建设和生态环境保护的重视。水土流失在目前是一种十分常见且严重的自然灾害,而水土流失会导致当地的自然环境受到极大的破坏,本文中针对农田水利工程建设以及生态环境保护之间的关系进行分析,针对我国目前的农田水利工程建设状况进行分析,对于如何开展有效的农田水利工程建设提供了参考,旨在为我国生态环境保护工作提供帮助和参考。
某水电站黑启动试验问题分析
Authors: 柴 山
Published: July 2020

水电站机组与火电、核电相比较,具有辅助设备少且容量低,厂用负荷较小,启动快速等优点,在电网发生瓦解事故时能快速黑启动恢复供电的能力强,作为电网黑启动电源的首选。本文介绍了某水电站首次黑启动试验过程中遇到的问题及分析、各个环节管控注意事项对电站黑启动有非常重要的意义。
水利水电工程建设的水土保持及其流失防治策略分析
Authors: 刘 万东
Published: July 2020

基于对水利水电工程建设的水土保持及其流失防治策略的探讨研究,首先要明确水利水电工程建设对环境的主要影响,然后与水利水电工程建设中导致水土流失的主要原因相结合,对工程建设中水土保持及其流失防治的措施展开分析。得出需制定合理的宏观控制目标、确保工程防护措施的有效落实、将水库枢纽区作为防治重点以及提高对道路水土保持的重视程度这四点对策,希望能为有关人士提供帮助。
水利工程施工中堤坝防渗加固技术的探讨
Authors: 任 世华
Published: July 2020

现如今,我国水利工程建设得到快速发展,在水利工程施工建设期间,加强堤坝防渗加固也成为工程施工中最为重要的内容。利用科学合理的加固技术可显著提高工程建设的质量,进而全方位发挥出水利工程建设的经济效益、社会效益和环境效益,促进社会的长期稳定发展。
水文水资源管理在水利工程中的应用探究
Authors: 刘 博
Published: July 2020

对于我国来说,我国的水资源总储量十分丰富,但是由于我国国民的数量越来越多,而且我国为了更好地发展也逐渐出现了很多企业,所以对于水资源的需求量也越来越大。从这一点来看,即使我国水资源的总量比较丰富,但是人均水资源的占有率非常低下,很多地区的人均水资源已经远远低于国际人均水资源的平均水平。针对这种情况,我国国民就需要转变这种形态,在使用水资源的时候需要加强对水资源的利用和开发,只有这样才能很大程度上节省水资源,进而有效保障水资源的利用效率,让每一个人都可以保障水资源的储备量,从而有效促进社会经济的可持续发展。
水电站智能安防系统研究应用
Authors: 赵 利
Published: July 2020

为了确保生产过程的安全和质量,很多水电厂都会选择安装安防系统,而传统的安防系统由于各方面的性能不够完善,并且系统通常是独立运行的,多数功能都没有完全得到应用,导致很多生产过程存在的问题不能及时发现,一些风险因素没有办法在第一时间得到解决,对此,介绍了智能系统的构成,并且分析了智能系统在水电站生产过程中的实际应用。
乌江白马航电枢纽工程船闸总体布置研究
Authors: 陈 思源
Published: July 2020

乌江白马航电枢纽工程船闸线路选择采用左厂房右船闸的整体布置方案。同时针对工程自身特点并结合水工模型试验,提出右岸船闸与导流明渠结合布置和左岸厂房与导流明渠结合布置的两类船闸布置方案。为寻求最佳布置方案,重点从施工导流、通航条件、工程量大小和工程投资等方面对其进行分析比选,论证了右岸船闸与导流明渠结合布置具有投资省、工期短、效益高等明显优势。
水利工程施工管理及技术的探析
Authors: 安 奕伟
Published: July 2020

近些年来,随着我国科技与经济技术的高速发展,我国有关水利工程方面的建设程度也逐步的走向稳定发展的趋势,并且目前这一现状已引起了很多的专业技术人员的关注与分析。在这一背景下,我国更加注重了水利工程施工技术的管理方面的相关问题研究与分析。本文就从水利工程施工技术管理方面存在的相关问题、水利工程的技术特征及其特点的分析、水利工程技术管理工作的主要任务与作用等问题进行了简要的分析,并且提出了一些有效的措施与方法,希望能够为水利工程方面服务人员提供一些建议。
机电井节水灌溉工程应注意的几个问题
Authors: 莫合买提 阿达来提 •
Published: July 2020

能源问题在我国经济快速发展的时代背景下是人们重点关注的问题之一,并且也是世界各国人民高度重视的一个问题。如今,我国的能源使用效率比较低,这就需要我们不仅要对经济发展的形势加以改变,同时还应该在科学技术发展的基础上不断加以创新。通过借助机电井来完成节水灌溉工作。但是,在具体运用该项技术的过程中,仍然有很多问题需要高度重视。鉴于此,本文就机电井节水灌溉工程应注意的几个问题展开探讨,以期为相关工作起到参考作用。
中小水电站水轮机调速器技术改造方案研究
Authors: 蔡 晓龙
Published: July 2020

我国的水电站是支持我国经济发展的重要动力,在过去,我国的很多中小水电站都为地方的经济社会发展提供了在能源基础上的发展动力,是帮助地区经济社会发展的巨大助力,而如今,经济的快速发展反馈到了水电站上,我国的各地区中小水电站开始对自身的升级和新建,同时,更多的新技术和新设备被引入了中小水电站当中。另外,国家为了帮助地方经济发展和基础设施更新,对中小水电站也进行了专门的帮助和扶持,协助改善很多地区的地方中小水电站落后情况。在中小水电站的运行当中,水轮机是重要的基础设备,而水轮机的正常运行都要依靠其调速器帮助作业,在我国的部分地区的中小水电站运行当中,水轮机调速器的改造成为了更新发展水电站的重要内容,为此,本文将对中小水电站水轮机调速器的技术改造方案进行分析,为我国的中小水电站更新发展提高效率提供一些理论上的支持和帮助。
comportamiento emprendedor en Ecuador, Chile y Colombia
Authors: Salazar Salazar Fernando , Nayascual Ipial Lady , Nayascual Ipial Luis
Published: July 2020

La investigación tiene un enfoque cuantitativo, además es de tipo no experimental, descriptiva y correlacional, que consideró los datos de los reportes Gem de Chile, Colombia y Ecuador de 2016 y 2017; con el propósito de determinar si las tasas de emprendimientos nacientes (TEN), actividad emprendedora temprana (TEA) y cierre de negocios (CN) tienen alguna relación con el estado del ecosistema de emprendimiento. Los principales resultados sugieren que el apoyo financiero, las políticas gubernamentales, los programas gubernamentales y la transferencia de I+D; son muy sensibles incluso pueden explicar, por encima del 30%, el comportamiento en la tasa de cierre de negocios.
Millennials and Reduced Car Ownership: Evidence from Recent Transport Surveys
Authors: Chen Peng , Wang Haoyun
Published: July 2020

This study examines the likelihood millennials are to own a car and the factors that have driven a reduction in car consumption. Based on a travel decision survey performed in 2015 in San Francisco, no significant evidence supports the claim that millennials are different from prior generations in terms of car ownership. Individuals with higher incomes and those that preferred more access and convenience were more likely to own a vehicle.
Reflecting Al-Hima on “Kinship Mindfulness” Within The Ammatoan’s Indigenous Kinship System for The Nature Sustainability Through Life Simplicity
Authors: Syarifuddin Nurmiati , Rokis Rohaiza , Engku Alwi Al Aydarus Engku Ahmad Zaki
Published: July 2020

This article studies exceptional indigenous-spiritual affections for ecological preservation through practicing a simple life. The main initiative of this study is to understand nature preservation practices of two communities of diverse continents – the Ammatoans and Arabs. The article is not designed to compare both, but a mere effort to link the indigenous-spiritual practices in respecting nature for ensuring sustainable resources on earth today through nature preservation i.e. forest, pasture and alike. The Arabs’ concept of “al-Hima” is a reflection of the Ammatoans’ “kinship mindfulness” – a new concept which this article is proposing. The article found the mindful intention, attention and attitude towards the forest in the Ammatoan’s kinship system mirror to the ancient old practice of grassland preservation among the Arabs. The data found that Ammatoans have huge respect for their forest. They are fully aware of the necessity to preserve the forest not only because the forest is an asset but most importantly is part of their spiritual life. To be mindful, they are guided by the Pasang Ri-Kajang – their indigenous handbook that obligates for forest preservation. The Ammatoan’s “kinship mindfulness” of West Sulawesi is particularly consistent with the "al-Hima” of the Arabs in the Middle East.
Memposisi Nilai Dalam Kerangka Demokrasi Di Malaysia: Satu Kajian Tinjauan
Authors: Hj Mak Din Hairol Anuar , Stapa Zakaria , Ismail Ahmad Munawar
Published: July 2020

The position of values in political system is significant to discuss. Based on Political System Model of David Easton, value and its function prevailed to be important. The absence of value in political framework may destabilize democratic function, even though Malaysian Federal Constitution upholds its tenets. Therefore, this article extensively repositions values as most relevant tenet in sub framework democracy in Malaysia.Keywords: Value, Politics, Democracy

Abstrak: Keberadaan nilai dalam sistem politik begitu signifikan. Berbekalkan rujukan terhadap Model Sistem Politik oleh David Easton sumber primier ini telah melakarkan kepentingan nilai beserta peranannya dalam proses pengagihan dalam sistem politik. Hal ini berpunca kerana kehilangan nilai dalam kerangka politik berupaya mengundang risiko ketidakstabilan terhadap kerukunan masyarakat rentetan daripada kerapuhan terhadap pendekatan demokrasi semata-mata. Di Malaysia pendekatan politik melalui wadah demokrasi secara sah diiktiraf dalam Perlembagaan Persekutuan, namun begitu proses terhadap pendekatan ini yang telah diamalkan sebenarnya mengundang beberapa persoalan yang perlu dibincangkan dengan lebih serius. Justeru artikel ini secara ekstensif memposisikan nilai sebagai kompas yang begitu relevan dalam subkerangka demokrasi di Malaysia.Kata kunci: Nilai, Politik, Demokrasi
Undi 18: Belia dan Politik Konvensional
Authors: Mohd Nizah Mohd Azmir , Mohd Sharif Sabri
Published: July 2020

Usaha ke arah pendemokrasian dan pilihan raya yang matang, adil serta saksama merupakan perkara yang perlu diberi tumpuan bagi memacu kemajuan pembangunan sosial dan politik seseuai dengan perubahan zaman. Di Malaysia, pilihan raya boleh dianggap sebagai kemuncak pendemokrasian. Maka Rang Undang-Undang (RUU) Perkara 119 Pindaan 2019 menjadi manifestasi misi besar proses pendemokrasian dengan menurunkan had umur kelayakan mengundi dan bertanding daripada 21 ke 18 tahun. Namun begitu, persoalan berkaitan maklumat dan data empirikal berkaitan perkara ini masih belum ditemukan. Artikel ini bertujuan melihat literatur-literatur berkaitan pengetahuan belia yang berumur 13 hingga 17 tahun terhadap kontruk-konstruk demokrasi. Ini bagi membolehkan pihak yang berwajib mengambil cakna agar demokrasi dan pilihan raya dapat dimanfaatkan oleh kumpulan yang terkesan ini. Analisa dokumen sekunder melalui kajian kepustakaan dan sorotan literatur bersistematik digunapakai bagi mendapatkan maklumat. Hasil artikel diharap dapat memberi input terhadap program dan dasar pihak berkepentingan dan kerajaan terhadap Undi 18.
Long-term Water Regime Studies of a Degraded Floating Fen in Hungary
Authors: Decsi Bence , Ács Tamás , Kozma Zsolt
Published: July 2020

Historical trends in water management and recent climatic variations put wetlands in the Carpathian basin under strong pressure and led to their degradation. The lack of extended site specific environmental data series inhibits the understanding of long-term eco-hydrological processes. This undermines the success of restoration and/or management efforts. As a precedent we analyzed a recently degraded Hungarian lowland wetland, the Nyárjas fen in order to identify the main cause of its drying. Our method is based on one-dimensional simulations of a variably saturated soil column representing the dominant hydrological conditions of the wetland. To properly define the necessary soil hydraulic parameters, soil sampling, laboratory measurements and inverse modelling were carried out. The hydrological simulations for the 1961-2010 period clearly suggest that (i) the wetland degraded due to a temporal unfavorable combination of regional groundwater depletion and decreased precipitation, (ii) and could not recover afterwards despite the improvement of hydrological conditions. The ecological water demand of the Nyárjas fen can be explicitly expressed in terms of groundwater level. However, water availability is a necessary, but not sufficient criteria of good habitat status. The elaborated methodology provides the basis of bottom-up type environmental water demand estimation on a regional/national scale.
Determination of Fatigue Limit of Coir/CNT/Fly Ash Reinforced Epoxy Polymer Matrix Composite
Authors: Gopalan Venkatachalam , Bhardwaj Pradhyumn , Satonkar Nilesh , Pragasam Vignesh
Published: July 2020

In the quest of new material development, polymer matrix composite plays prominent role. Instead of reinforcing synthetic material in the polymer composite, an attempt is made in this work to reinforce green/recyclable/reusable materials in the polymer composite. Composite specimens are made with epoxy as matrix and coir/CNT/fly ash as reinforcements. The influences of wt.% of coir/CNT/fly ash on fatigue behavior of composite are determined. Response Surface Methodology (RSM), a Design of Experiments (DOE) approach is followed in specimen preparation and testing. ANOVA is used to find the influences of different parameters such as wt.% of coir/CNT/fly ash on fatigue behavior of composite. Optimized levels of parameters are also found out.
BENTUK PERTUNJUKAN OPERA TIMUN EMAS KARYA JONET SRI KUNCORO
Authors: Sari Etika , Rahayu Nanuk
Published: July 2020

The Opera Timun Emas is an Opera-shaped dance work in Directed by Jonet Sri Kuncoro on birthday Soeryo Soemirat Dance Workshop to 34 in 2016. Problem in this research is how the process of scrattering and how Opera Timun Emas performances. Based on the object examined this research uses qualitative methods with a process approach to and shape. To know about the process of using the the thought of Rahayu Supanggah about the garrison covering the material, facilities, and furniture, and a garage, and a Working on. Discussing form issues using form concepts Suzane K. Langer which is explained by the opinion of R. M Soedarsono Discussing elements that include dance movements, formations, makeup, fashion, Dance music, dramatic design, theme, choreography group of places Staging, lighting, and arrangement of events. The results showed that the Opera Timun Emas includes in the genre of opera dance dramas, which are directed by In consideration of the garap, penggarap, facilities, furniture, and a line of Opera Timun Emas takes the basic idea of concern for a child’s world Folklore. Portrayed by the students of the Soeryo Soemirat. The Opera Timun Emas form can be seen from the existing elements Dance, formations, makeup, fashion, dance music, dramatic design, themes, the choreography of a group of staging, lighting, and The event was directed into a intact unity.Keywords: Opera, Garap, shape.
MAKNA GERAK TARI TANGGAI DI KOTA PALEMBANG SUMATERA SELATAN
Authors: Katungga Gabriella Saras , Syahrial S
Published: July 2020

Tanggai Dance is a welcome guest dance in the city of Palembang. Tanggai Dance is one of the dance that until now continues to exist and become a dance that must be known and studied by young people especially women. It is not recklessly to dance the Tanggai dance, but dancers should also know the contents of the dance, because there is a value to be conveyed to the people who appreciate the Tanggai dance. There are two focus problems that will be researched and formulated in the research question which is how the form of Tanggai dance and what is the meaning of the movement of Tanggai dance in the city of Palembang. This research uses qualitative research methods. The research aims to discuss the shape and meaning of the dance movements of Tanggai. The discussion of the form uses the concept of Suzzane K. Langer and Soedarsono about the form which means the structure of a relationship of various factors that are intertwined. Discussion of the meaning of motion using the concept expressed by Anya Peterson Roice about the three things of use is, mimetic, abstract, and metaphoric. The result of this research is Tanggai dance in Palembang city is a packaging dance form for welcome guests. Related to the meaning of the whole movement of Tanggai dance that has the meaning of surrender to the Lord Almighty.Keywords: dance form and motion meaning.
KUDA-KUDA PENCAK SILAT DALAM PENCIPTAAN TARI JI KARYA GALUH PUSPITA SARI PADA TAHUN 2018 DI GEDUNG TEATER BESAR ISI SURAKARTA
Authors: Sari Galuh Puspita , Bantolo Matheus Wasi
Published: July 2020

JI Dance Works is a new choreography work that departs with the basic motion of horses on the Pencak Silat as well as the phenomenon of binary opposition in life in which two things both have the meaning of balance in his achievements. The problem that will be discussed in this research is how the concept of binary opposition and Pencak Silat in the creation and how to form the dance works. To outline the creation problem using the concept of Alma M. Hawkins strengthened by the creation of contemporary dance according to Matheus Wasi Bantolo and the cultivation of Pencak Silat moves to dance according to Mathias Supriyanto. This writing and assessment use practice based research method with qualitative basis of interpertative destriptif, with participant action research process. The process of creation in JI dance Works is based on Observation, improvisation, composition and evaluation techniques. JI Dance works in a pair of choreography with a fighting theme As the concept of binary opposition in the life and the design of the basic motion of horses in the Pencak Silat as a source of the idea of creation and combined with the concept of binary opposition as inspiration by taking the essence of balance of both things t Telecast. The motion developed through the basic motion of horses, styles, and also the Kembangan (art of fighting) is found in the PSHT Pencak Silat College. Developing the basic motion of Pencak Silat into the dance by searching for similarities, from the shape of horses to Pencak Silat with the shape of the climb on the dance that was given the science of choreography such as levelgiving, volume, and the creation of the atmosphere in the dish Combined with the possibility of dance music and the Nglambari. Keywords: kuda-kuda Pencak Silat, JI dance, binary opposition.
Performance study on yield and yield attributes of seven white jute breeding lines at different regions of Bangladesh
Authors: Miah A , Saha NR , Rafiq MZA , Ali MY , Hasanuzzaman M
Published: July 2020

The study was conducted to know the performance of growth, yield contributing parameters and yield of seven white Jute breeding line and two checks (CVL-1 and CVE-3) at five different jute research regional stations of Bangladesh Jute Research Institute (BJRI) during the period from March to September 2014. The experimental data was laid out in a completely randomized block design with three replications and the means were adjudged by DMRT at 5% level of probability. The performances of experimental lines were showed statistically significant variation among the studied whole growth, yield and yield attributing traits. Analysis of variance revealed significant differences among the treatments for fibre yield and stick yield at Rangpur plant height, base diameter, fibre and stick yield at Manikganj plant height and fibre weight at Chandina, Faridpur and plant height at Kishoreganj. It was revealed by the pooled mean performance that among the genotypes, the line C-5018 m produce the tallest plant among the lines. The Line C-5030 recorded both the highest plant population (0.241 m/ha) and base diameter (21.79 mm). The line C-5133 showed highest Green weight with leaves (43.12 t/ha) whereas C-5149 recorded the greatest Green weight without leaves (35.02 t/ha). The most important parameter is the fiber yield and the highest-fibre weight (2.83 t/ha) was recorded by the line C-5149 among the seven breeding line. The line C-5149 also recorded the highest amount of stick yield (6.01 t/ha). However, pooled mean over stations revealed that no progenies, C-5018, C-5030, C-5036, C-5044, C-5133, C-5136, C-5149 out-yielded both the check varieties CVL-1 (2.83 t/ha) and CVE-3 (2.54t/ha) whereas C-5149(2.83t/ha) shows the equivalent result as CVL-1. It was also revealed that C-5030(2.61t/ha), C-5136(2.70t/ha) and C-5149(2.83t/ha) out yielded check variety CVE-3 (2.54t/ha).

Progressive Agriculture 31 (1): 19-25, 2020
USE OF ENERGOPROTEIN CONCENTRATES BASED ON LUPINE IN FEEDING DAIRY COWS IN THE CONDITIONS OF THE KALININGRAD REGION
Authors: Fedorova Zinaida , Tkachenko Yuri , Bliadze Vasily
Published: July 2020

The data on feeding dairy cows of an energy protein concentrate (EPC) are presented. EPC consists of grain of narrow-leaved lupine, flax, triticale, subjected to heat treatment on a press extruder. The effect of EPC on the change in milk production of cows was determined. The inclusion of extruded concentrate based on lupine grains in the diets of cows made it possible to obtain an increase in milk. Concentrate based on lupine, flax, triticale is equal in biological value to full-fat soy, and at a much lower cost.
USE OF ENZYME COMPLEX "FIBRASE" IN FEEDING COWS
Authors: Buryakov Nikolay , Buryakova Maria , Hardik Irina
Published: July 2020

Comparative analysis of nutritional value of daily rations of the cows used on the farm, determined a positive effect of enzyme complex "FIBRASE" on the level milk production and quality characteristics of milk cows in first third of lactation.
INFLUENCE OF MINERAL AND ORGANIC FERTILIZER SYSTEMS ON PRODUCTIVITY OF LONG-TERM PASTURE HERBAGE
Authors: Smirnova Anna
Published: July 2020

The results of research conducted on a long-term cultural pasture, used without re-grazing the grass for grazing production herds since 1935. The use of mineral and organic fertilizers on this herbage makes it possible to ensure an uninterrupted supply of high-quality green mass in the spring and summer period and to preserve mainly cultivated grasses in the herbage, which are well eaten by cattle.
INFLUENCE OF ATMOSPHERIC PRECIPITATION ON THE EFFICIENCY OF SLUICING IN THE CONDITIONS OF DEPLETED PEATLANDS
Authors: Ulanov Nikolay
Published: July 2020

The paper presents data on the nature of the influence of atmospheric precipitation on the process of forming the yield of main forage crops in areas with different drainage rates, capacity of the residual peat layer and regularity of the water regime.
ALFALFA VARIETIES ZONED IN THE CENTRAL CHERNOZEM ZONE OF THE RUSSIAN FEDERATION
Authors: Stepanova Galina
Published: July 2020

The article describes the main morphological and biological features of alfalfa varieties included in the State register of breeding achievements approved for use in the Central Chernozem zone of Russia. A total of 32 alfalfa varieties are included in the State register. This is 9 varieties of blue alfalfa (Medicago sativa L. subsp. Sativa) of domestic selection and 8 foreign, 11 varieties of variable alfalfa (Medicago sativa L. nothosubsp. varia (Martyn) Arcang.) domestic selection and 1 variety of foreign and 3 varieties of yellow alfalfa (Medicago sativa L. subsp. falcata (L.) Arcang.). It shows the average and maximum yield of varieties determined in the process of state variety testing, as well as independent evaluation in research institutions in the region. Varieties of blue alfalfa of domestic selection Kevsala, Elena, Satellite, Vavilovskaya Yubileynaya were the most productive. The average yield of dry matter of these varieties reaches 8.4–9.2 t/ha, the maximum — 15.3–17.7 t/ha. Alfalfa varieties Timbale and Galaxy were the most productive among foreign varieties: the average yield of dry matter was 8.1 and 8.3 t/ha, the maximum – 15.5 and 17.2 t/ha. Varieties of alfalfa variable Vitalina and Vela provided an average yield of dry matter of 7.6 and 9.0 t/ha, the maximum yield reached 15.4 and 18.1 t/ha.
STUDY OF SAMPLES OF VARIABLE ALFALFA ON THE MAIN ECONOMIC AND VALUABLE CHARACTERISTICS IN A CONTROL NURSERY FOR SINGLE-SPECIES SEEDING
Authors: Solozhentseva Lyudmila , Piskovatsky Yuri , Lomov Mikhail
Published: July 2020

The article presents the results of evaluating samples of variable alfalfa in 2014–2018 in the nursery (witch single-species seeding) on the indicators of winter hardiness, feed mass productivity, nutritional value, resistance to major diseases, etc.
PRIMING AS THE FACTOR OF INCREASE OF EFFICIENCY SEED PRODUCTION OF BIRDSFOOT TREFOIL
Authors: Zolotarev Vladimir
Published: July 2020

A characteristic property of legumes is the formation of hard-stone seeds. To use such seeds for sowing, it is necessary to carry out measures to increase their seeding indicators. The article provides an overview of methods of pre-sowing preparation of seeds, priming (Seed Priming). The harvest of Birdsfoot trefoil (Lotus corniculatus L.) can contain up to 90% or more hard-stone seeds. Mechanical priming of hard-stone seeds of Birdsfoot trefoil increases their germination energy and field germination.
Investigação qualitativa nos contextos da psicologia e do ensino
Authors: Fernandes-Sobrinho Marcos , Castro Paulo Alexandre de , Saavedra Rodrigo Arellano , Gonçalves Vitor Manuel  Barrigão
Published: July 2020

Editorial de apresentação de artigos selecionados, provenientes de apresentações no 8º Congresso Ibero-Americano em Investigação Qualitativa (CIAIQ2019).
Impact of Effective Microorganisms (EM) Application on the Physical Condition of Haplic Luvisol
Authors: Pranagal Jacek , Ligęza Sławomir , Smal Halina
Published: July 2020

The study set out to determine changes in the soil air-water properties, the water-stable aggregate share and organic carbon content as effects of a five-year application of effective microorganisms (EM-A). The hypothesis that long-term applied EM-A biopreparations have a positive effect on the soil physical condition has not been confirmed. Haplic Luvisols originating from silt were studied in a field experiment after EM-A biopreparation treatment. The soil samples with the natural structure preserved intact were collected three times each year. The properties of the soil determined in the study were: particle density, total organic carbon content, bulk density, total porosity, air capacity, air permeability, soil moisture at sampling, field water capacity, available water content, unavailable water content, and water-stable aggregate content. The ratio of field water capacity and total porosity (FC/TP) was calculated. It was found that EM-A application primarily leads to a decrease in the content of organic carbon and water-stable aggregates. This was an adverse effect. Total organic carbon (TOC) and water-stable aggregates proved to be very sensitive indicators for assessing the soil physical condition. However, changes in soil compaction and air–water properties did not show significant deterioration. Our research addresses the data gaps about EM application to soil.
Browning of Early and Late-Harvested ‘Empire’ Apples Affected by Cold Storage and 1-MCP
Authors: Jung Seok-Kyu , Choi Hyun-Sug
Published: July 2020

The effects of harvest time, 1-methylcyclopropene (1-MCP) and air storage time on the susceptibility of flesh browning in ‘Empire’ apples were studied during a seven-day shelf life period after air storage at 0.5 °C for seven months. Early- or late-harvested ‘Empire’ apples without 1-MCP increased production of ethylene, respiration rates and internal ethylene concentration during the shelf life. Respiration rates increased in the late-harvested fruit for the shelf life period with/without 1-MCP treatment. The 1-MCP-treated fruit was approximately 10 N firmer than fruit not treated with 1-MCP at an early harvest for the entire shelf life duration. Peroxidase activity and percent change in electrical conductivity in the flesh were elevated in late-harvested fruit for the shelf life duration, whereas polyphenol oxidase activities were found to be stimulated by 1-MCP treatment, regardless of harvest time. Late-harvested fruit treated with 1-MCP exhibited increased susceptibility to flesh browning during shelf life, mostly due to reduction of the antioxidant defense mechanism of the fruits to stress in extending storage life, increasing polyphenol oxidase (PPO) activity and electrolyte leakage rate.
Assessing Pain Control Efficacy of Meloxicam and Ketoprofen When Compounded with Iron Dextran in Nursing Piglets Using A Navigation Chute
Authors: Reynolds Kristen , Johnson Ron , Brown Jennifer , Friendship Robert , O’Sullivan Terri L.
Published: July 2020

The efficacy of analgesics such as meloxicam and ketoprofen to control pain in piglets when mixed with iron dextran (ID) before injection is unknown. The purpose of this study was to compare perceived pain in castrated piglets treated 1 h before castration with either of these drugs alone, or when mixed with ID, by observing the time it takes for piglets to navigate a chute. Piglets were divided into seven treatment groups (n = 25 piglets per treatment group) including castration with analgesia (meloxicam or ketoprofen), castration with analgesic plus ID, castration without analgesic or ID, sham handled and given ID, and sham handled alone. Piglets were placed in a short chute and their time to navigate the chute was recorded at four timepoints following castration. Piglets given meloxicam or ketoprofen, with or without ID did not differ from each other in their chute navigation times. Additionally, these piglets did not differ from treatment groups that were not castrated. Piglets castrated without analgesia had significantly longer navigation times. These results indicate that meloxicam or ketoprofen, whether mixed with ID prior to injection or not, provide similar analgesic efficacy.
Piceatannol Ameliorates Hepatic Oxidative Damage and Mitochondrial Dysfunction of Weaned Piglets Challenged with Diquat
Authors: Jia Peilu , Ji Shuli , Zhang Hao , Chen Yanan , Wang Tian
Published: July 2020

The liver is an organ that produces large amounts of reactive oxygen species (ROS). Human infants or piglets are prone to oxidative damage due to their uncompleted development of the antioxidant system, causing liver disease. Piceatannol (PIC) has been found to have significant antioxidant effects. The aim of this experiment was to investigate the effects of PIC on the liver in piglets experiencing oxidative stress caused by diquat (DQ). After weaning, 54 male piglets (Duroc × [Landrace × Yorkshire]) were selected and randomly divided into three treatment groups: the CON group, the DQ-CON group, and the DQ-PIC group. The two challenged groups were injected with DQ and then orally administrated either PIC or another vehicle solution, while the control group was given sterile saline injections and an orally administrated vehicle solution. Compared to the results of the CON group, DQ increased the percentage of apoptosis cells in the liver, also decreased the amount of reduced glutathione (GSH) and increased the concentration of malondialdehyde (MDA). In addition, the adenosine triphosphate (ATP) production, activities of mitochondrial complex I, II, III, and V, and the protein expression level of sirtuin 1 (SIRT1) were inhibited by DQ. Furthermore, PIC supplementation inhibited the apoptosis of hepatic cells caused by DQ. PIC also decreased MDA levels and increased the amount of GSH. Piglets given PIC supplementation exhibited increased activities of mitochondrial complex I, II, III, and V, the protein expression level of SIRT1, and the ATP production in the liver. In conclusion, PIC affected the liver of piglets by improving redox status, preserving mitochondrial function, and preventing excessive apoptosis.
Economic Viability of Adoption of Automated Oestrus Detection Technologies on Dairy Farms: A Review
Authors: Adenuga Adewale Henry , Jack Claire , Olagunju Kehinde Oluseyi , Ashfield Austen
Published: July 2020

The decision for dairy farmers to invest in automated oestrus detection (AOD) technologies involves the weighing up of the costs and benefits of implementation. In this paper, through a review of the existing literature, we examine the impacts of investment in AOD technologies in relation to the profitability and technical performance of dairy farms. Peer-reviewed articles published between 1970 and 2019 on the investment viability of AOD technologies were collated and analysed. We capture the different measures used in assessing the economic performance of investment in AOD technologies over time which include net present value (NPV), milk production, Benefit-Cost Ratio (BCR), internal rate of return (IRR) and payback period (PBP). The study concludes that investment in AOD technologies is not only worthwhile but also contributes to farm profitability.
BactericidalActivity of Crevicular Polymorphonuclear Neutrophils in Chronic Periodontitis Patients and Healthy Subjects under the Influence of Areca Nut Extract: An In Vitro Study
Authors: Shrivastava Deepti , Srivastava Kumar Chandan , Dayakara Jithendra Kajoor , Sghaireen Mohammed G. , Gudipaneni Ravi Kumar , Al-Johani Khalid , Baig Muhammad Nadeem , Khurshid Zohaib
Published: July 2020

Arecanutchewing is an established risk factor for oral submucous fibrosis (OSMF), but its role in periodontal disease has not yet been defined. Thisstudy aimed to assess the effect of areca nut extracts (ANE) on the bactericidal activity of crevicular polymorphonuclear neutrophils (cPMNs) in healthy subjects and chronic periodontitis (CP) patients. An in vitro study was designed with an equal number of (n = 30) gingival crevicular fluid (GCF) samples collected from CP patients and healthy subjects. Bactericidal activity and hydrogen peroxide (H2O2) assays were performed with the GCF samples pre-treated with extracts of two varieties of areca nut: ripe and tender. Simultaneously, controls were also carried out with Hank’s balanced salt solution (HBSS) and catechin. Independent t-test and one-way analysis of variance (ANOVA), along with post-hoc analysis, were employed for statistical analysis. In both study groups, a significant reduction (p < 0.01)in the bactericidal activity was noted when the samples treated with the ripe areca nut (rANE) were compared with the tender variant (tANE). Similarly, H2O2 levels were significantly reduced (p < 0.001) in the rANE in contrast to tANE for both study groups. The above results were significant within the group but were found to be non-significant between the study groups, except when it was treated with HBSS (p < 0.001). In the present study, it was found that there was a reduction in the bactericidal activity and H2O2 production of cPMNs in both healthy subjects and CP patients in the presence of areca nut extract. Moreover, the effect of rANE on cPMNs was more detrimental than tANE.
Analysis of Mobile Phone Data to Compare Mobility Flows and Hotspots Before and After the Opening of High-Speed Railway: Case Study of Honam KTX in Korea
Authors: Eom Jin Ki , Lee Kwang-Sub , Song Ji Young , Lee Jun
Published: July 2020

Mobile phone data provides information, such as the home (origin) and current locations of people. The data can be used to analyze the impact of new high-speed railway (HSR) openings. This study examined the population observed in stations and cities of the Honam HSR line in Korea, based on mobile phone data recorded one year before and after its opening. We analyzed the volume of the population observed at each railway station, density of the distance between home and station, and activity hotspots in a city. The results show that the number of people and travel distance increased after the opening of the HSR. The distance to access railway stations increased, as the HSR saves travel time. Moreover, the activity hotspots in a city increased after the opening of the HSR, as more people gathered near the station area. The findings show that the mobility measures enhanced after the opening of the HSR for regional travel and local activities. These measures can help transit agencies and planners in providing better intercity travel.
Zinc Oxide Nanorod Surface-Enhanced Raman Scattering Substrates without and with Gold Nanoparticles Fabricated through Pulsed-Laser-Induced Photolysis
Authors: Chou Chia-Man , Thanh Thi Le Tran , Quynh Nhu Nguyen Thi , Liao Su-Yu , Fu Yu-Zhi , Hung Le Vu Tuan , Hsiao Vincent K. S.
Published: July 2020

We fabricated surface-enhanced Raman scattering (SERS) substrates using gold nanoparticle (AuNP)-decorated zinc oxide (ZnO) nanorods (NRs). Prior to decoration with AuNPs, ZnO NRs on the glass substrate fabricated using the sol–gel method could enhance the SERS signal for detecting 10−5 M rhodamine 6G (R6G). Microscopic analysis revealed that the thermal-annealing process for fabricating the seed layers of ZnO facilitated the growth of ZnO NRs with the highly preferred c-axis (002) orientation. A decrease in the diameter of ZnO NRs occurred because of the use of annealed seek layers further increased the surface-to-volume ratio of ZnO NRs, resulting in an increase in the SERS signal for R6G of 10−5 M. To combine the localized surface plasmon resonance (LSPR) mode with the charge transfer (CT) mode, ZnO NRs were decorated with AuNPs through pulsed-laser-induced photolysis (PLIP). However, the preferred vertical (002) orientation of ZnO NRs was prone to the aggregation of AuNPs, which hindered the SERS signal. The experimental results revealed that ZnO NRs with the crystalline structure of horizontal (100) and (101) orientations facilitated the growth of homogeneous, independent and isolated AuNPs which serves as “hot spots” for SERS signal of detecting R6G at a low concentration of 10−9 M. Comparing to previous fabrication of SERS substrate, our method has advantage to fabricate AuNP-decorated ZnO NR in a short time. Moreover, the optimization of the SERS behaviors for different fabrication conditions of AuNPs using the PLIP method was investigated in detail.
Selected Properties of Overlaid Magnesium Based Composite Panels for Flooring
Authors: Aslanova Fidan , Elkiran Gozen , Hiziroglu Salim , Ilseven Serkan
Published: July 2020

The objective of this work was to evaluate some of the mechanical and physical properties of the flooring materials manufactured from panels having magnesia substrate overlaid with oak veneer (Querqus alba) and linoleum sheets. Commercially manufactured panels were used in this work. Bending characteristics, internal bond strength, thickness swelling, and surface quality of the samples were evaluated. The highest modulus of elasticity (MOE) value of 4406 MPa for the sample type-A2 was loaded in the direction of the substrate followed by 3478 MPa for linoleum covered samples which were loaded in the same direction. Internal bond strength values of the panels did not show any significant differences from each other. Dimensional stability of the specimens in the form of thickness swelling for both 2-h and 24-h water soaking tests resulted in values ranging from 0.11 to 0.19%. The surface quality of the samples was not substantially influenced as a function of water exposure. Based on the results in this work magnesium substrate overlaid with oak veneer and linoleum panels could have potential to be used as flooring material with accepted properties.
The GDP-Bound State of Mitochondrial Mfn1 Induces Membrane Adhesion of Apposing Lipid Vesicles through a Cooperative Binding Mechanism
Authors: Tolosa-Díaz Andrés , Almendro-Vedia Víctor G. , Natale Paolo , López-Montero Iván
Published: July 2020

Mitochondria are double-membrane organelles that continuously undergo fission and fusion. Outer mitochondrial membrane fusion is mediated by the membrane proteins mitofusin 1 (Mfn1) and mitofusin 2 (Mfn2), carrying a GTP hydrolyzing domain (GTPase) and two coiled-coil repeats. The detailed mechanism on how the GTP hydrolysis allows Mfns to approach adjacent membranes into proximity and promote their fusion is currently under debate. Using model membranes built up as giant unilamellar vesicles (GUVs), we show here that Mfn1 promotes membrane adhesion of apposing lipid vesicles. The adhesion forces were sustained by the GDP-bound state of Mfn1 after GTP hydrolysis. In contrast, the incubation with the GDP:AlF 4 − , which mimics the GTP transition state, did not induce membrane adhesion. Due to the flexible nature of lipid membranes, the adhesion strength depended on the surface concentration of Mfn1 through a cooperative binding mechanism. We discuss a possible scenario for the outer mitochondrial membrane fusion based on the modulated action of Mfn1.
Sex and Gender Influences on Cancer Immunotherapy Response
Authors: Irelli Azzurra , Sirufo Maria Maddalena , D’Ugo Carlo , Ginaldi Lia , De Martinis Massimo
Published: July 2020

The global burden of cancer is growing and a wide disparity in the incidence, malignancy and mortality of different types of cancer between each sex has been demonstrated. The sex specificity of cancer appears to be a relevant issue in the management of the disease, and studies investigating the role of sex and gender are becoming extremely urgent. Sex hormones are presumably the leading actors of sex differences in cancer, especially estrogens. They modulate gene expression, alter molecules and generate disparities in effectiveness and side effects of anticancer therapies. Recently immunotherapy aims to improve anticancer treatment strategies reducing off-target effects of chemotherapy and direct cancer cells killing. It is recognized as a fruitful strategy to treat and possible to cure cancer. Immunotherapeutic agents are used to activate or boost the activation of the immune system to fight cancer cells through physiological mechanisms often evaded in the offensive march of the disease. These therapeutic strategies have allowed new successes, but also have serious adverse effects including non-specific inflammation and autoimmunity. Sex and gender issues are of primary importance in this field, due to their recognized role in inflammation, immunity and cancer, and the clarification and understanding of these aspects is a necessary step to increase the responses and to diminish the adverse effects of immunotherapy. This review describes the available knowledge on the role of sex and gender in cancer immunotherapy, and will offer insights to stimulate the attention and practice of clinicians and researchers in a gender perspective of new cancer treatment strategies.
Beneficial Contribution of Biosourced Ionic Liquids and Microwaves in the Michael Reaction
Authors: Bacha Katia , Aguibi Kawther , Mbakidi Jean-Pierre , Bouquillon Sandrine
Published: July 2020

We developed a synthesis of chiral ionic liquids from proline and one of its derivatives. Nine chiral ionic liquids were synthesized with yields from 78% to 95%. These synthesized ionic liquids played two roles in Michael reactions, as solvents, and as basic catalysts, where the ionic phase could also be reused at least five times without loss of activity. The yields up to 99% were improved by increasing the amount of dimethylmalonate from 1.2 equivalents to 3 or 4 equivalents. Furthermore, the reaction time could be reduced from 24 h to 45 min through microwaves activation.
Mechanistic Investigation on Hydrocyanation of Butadiene: A DFT Study
Authors: Liu Kaikai , Zhang Shuai , Han Minghan
Published: July 2020

The nickel-catalyzed addition of Hydrocyanic acid (HCN) to butadiene usually leads to a mixture of the branched 2-methyl-3-butenenitrile (2M3BN) and the linear 3-pentenenitrile (3PN) with a 30:70 ratio by employing mono-dentate phosphites, while a 97% selectivity to 3PN is obtained using a 1,4-bis(diphenyphosphino)butane (dppb) ligand and Ni(COD)2 (1,5-Cyclooctadiene) as catalysts. To explain this phenomenon, a reasonable mechanism of the hydrocyanation, involving the cyano (CN) migration (for 3PN) and the methylallyl rotation (for 2M3BN) pathways, is proposed. The key intermediates and the rate-determining steps in the pathways have been illustrated. The methylallyl rearrangement is the rate-determining step in the formation of 3PN while the reductive elimination governs the reaction to 2M3BN, which is subsequently isomerized to 3PN. Moreover, the opposite changes of the bite angle of the intermediates and transition states explain how the reactions proceed in two different directions.
Outlook on the Role of Microbial Fuel Cells in Remediation of Environmental Pollutants with Electricity Generation
Authors: Yaqoob Asim Ali , Khatoon Asma , Mohd Setapar Siti Hamidah , Umar Khalid , Parveen Tabassum , Mohamad Ibrahim Mohamad Nasir , Ahmad Akil , Rafatullah Mohd
Published: July 2020

A wide variety of pollutants are discharged into water bodies like lakes, rivers, canal, etc. due to the growing world population, industrial development, depletion of water resources, improper disposal of agricultural and native wastes. Water pollution is becoming a severe problem for the whole world from small villages to big cities. The toxic metals and organic dyes pollutants are considered as significant contaminants that cause severe hazards to human beings and aquatic life. The microbial fuel cell (MFC) is the most promising, eco-friendly, and emerging technique. In this technique, microorganisms play an important role in bioremediation of water pollutants simultaneously generating an electric current. In this review, a new approach based on microbial fuel cells for bioremediation of organic dyes and toxic metals has been summarized. This technique offers an alternative with great potential in the field of wastewater treatment. Finally, their applications are discussed to explore the research gaps for future research direction. From a literature survey of more than 170 recent papers, it is evident that MFCs have demonstrated outstanding removal capabilities for various pollutants.
Ribosomal Protein uL11 as a Regulator of Metabolic Circuits Related to Aging and Cell Cycle
Authors: Mołoń Mateusz , Molestak Eliza , Kula-Maximenko Monika , Grela Przemysław , Tchórzewski Marek
Published: July 2020

Aging is a biological phenomenon common to all living organisms. It is thought that the rate of aging is influenced by diverse factors, in many cases related to the control of energy metabolism, i.e., the so-called pro-longevity effects of starvation. Translation, regarded as the main energy consumption process, lies at the center of interest, as it has a significant impact on the longevity phenomenon. It has been shown that perturbations in the translational apparatus may lead to a lower rate of aging. Therefore, the main aim of this study was to investigate aging in relation to the protein biosynthesis circuit, taking into account the uL11 ribosomal protein as a vital ribosomal element. To this end, we used set of yeast mutants with deleted single uL11A or uL11B genes and a double disruptant uL11AB mutant. We applied an integrated approach analyzing a broad range of biological parameters of yeast mutant cells, especially the longevity phenomenon, supplemented with biochemical and high throughput transcriptomic and metobolomic approaches. The analysis showed that the longevity phenomenon is not fully related to the commonly considered energy restriction effect, thus the slow-down of translation does not represent the sole source of aging. Additionally, we showed that uL11 can be classified as a moonlighting protein with extra-ribosomal function having cell-cycle regulatory potential.
Influence of Two-Stage Anodization on Properties of the Oxide Coatings on the Ti–13Nb–13Zr Alloy
Authors: Ossowska Agnieszka , Zieliński Andrzej , Olive Jean-Marc , Wojtowicz Andrzej , Szweda Piotr
Published: July 2020

The increasing demand for titanium and its alloys used for implants results in the need for innovative surface treatments that may both increase corrosion resistance and biocompatibility and demonstrate antibacterial protection at no cytotoxicity. The purpose of this research was to characterize the effect of two-stage anodization—performed for 30 min in phosphoric acid—in the presence of hydrofluoric acid in the second stage. Scanning electron microscopy, atomic force microscopy, energy-dispersive X-ray spectroscopy, X-ray diffraction, Raman spectroscopy, glow discharge optical emission spectroscopy, nanoindentation and nano-scratch tests, potentiodynamic corrosion studies, and water contact angle measurements were performed to characterize microstructure, mechanical, chemical and physical properties. The biologic examinations were carried out to determine the cytotoxicity and antibacterial effects of oxide coatings. The research results demonstrate that two-stage oxidation affects several features and, in particular, improves mechanical and chemical behavior. The processes influencing the formation and properties of the oxide coating are discussed.
Bekenstein’s Entropy Bound-Particle Horizon Approach to Avoid the Cosmological Singularity
Authors: Powell James R. , Lopez-Mobilia Rafael , Matzner Richard A.
Published: July 2020

The cosmological singularity of infinite density, temperature, and spacetime curvature is the classical limit of Friedmann’s general relativity solutions extrapolated to the origin of the standard model of cosmology. Jacob Bekenstein suggests that thermodynamics excludes the possibility of such a singularity in a 1989 paper. We propose a re-examination of his particle horizon approach in the early radiation-dominated universe and verify it as a feasible alternative to the classical inevitability of the singularity. We argue that this minimum-radius particle horizon determined from Bekenstein’s entropy bound, necessarily quantum in nature as a quantum particle horizon (QPH), precludes the singularity, just as quantum mechanics provided the solution for singularities in atomic transitions as radius r → 0 . An initial radius of zero can never be attained quantum mechanically. This avoids the spacetime singularity, supporting Bekenstein’s assertion that Friedmann models cannot be extrapolated to the very beginning of the universe but only to a boundary that is ‘something like a particle horizon’. The universe may have begun in a bright flash and quantum flux of radiation and particles at a minimum, irreducible quantum particle horizon rather than at the classical mathematical limit and unrealizable state of an infinite singularity.