bluuebunny/crossref_metadata_2025_split huggingface dataset:
Ensino do tema tabela periódica na educação básica
Authors: Gonzaga Glaucia Ribeiro , Miranda Jean Carlos , Ferreira Matheus Lopes 
Published: October 2019

O ensino da tabela periódica da educação básica está presente de forma introdutória no 9º ano do Ensino Fundamental e de forma mais aprofundada no 1º ano do Ensino Médio. Independente do nível de abordagem, seu ensino ainda ocorre de forma tradicional em muitas instituições de ensino, pautando-se na memorização exaustiva da estrutura de organização e das propriedades dos elementos. Esse processo de ensino torna a tabela periódica um conteúdo de pouco interesse e despreza o processo histórico de sua construção. Nesse sentido, o presente artigo tem por objetivo discutir e incentivar a adoção de uma abordagem envolvendo a história da ciência de forma contextualizada, além da adoção de outros recursos didáticos, e não apenas a tabela impressa. Para tal, apresenta-se uma breve revisão bibliográfica sobre a história da tabela periódica e sua abordagem em sala de aula. Sugere-se ainda o uso de diferentes metodologias para o ensino do tema na educação básica.
Trends in the Development of the Balance of Payments and the International Investment Position of Russia
Authors: Petrikova E. M. 
Published: October 2019

The article deals with the economic and statistical analysis of trends in the development of statistical data on the balance of payments and the international investment position of Russia over the past 15 years, indicating the sustainable development of the foreign economic sector of the Russian economy.The article begins with addressing the scope and subject matter of the study of the balance of payments and the international investment position of the country. Then the author examines external economic activities for each of the three periods depicting the inﬂuence of the crisis phenomena in the global economy in 1998, 2008 and 2014. Within these periods the author considers the interaction of the world and Russian economies, serious reduction of the external sector of the Russian economy in these periods of crisis and generally the deterioration of the results of foreign economic activity of the country. Comparing the balance of payments and international investment position before and after crisis periods it is possible to note the good state government management of the external sector of the Russian economy, which helped to restore the balance of payments of the country and to increase its net international investment position after the crisis.On a ﬁnal note, it is concluded that the most eﬀective and eﬃcient for external regulation in a crisis is the so called proﬁtable method when the expense of centralized redistribution of income and cash management of ﬁnancial ﬂows, is formed in the margin in the markets, determines the scale and direction of cash ﬂows, are governed by incorporated in the cost of exported products yield. The market method with the help of tariﬀ pricing and regulation does not allow to fully control and predict the vector of cash ﬂows in a crisis, redistribute proﬁtability between sectors of the economy and even “save” borrowers in crisis situation.
The Project of State Statistics Reform by A.M. Zolotarev in the Light of the International Statistical Congresses Decisions
Authors: Yamaguchi Akiyoshi 
Published: October 2019

The article examines how the outcome of international statistical congresses shaped A.M. Zolotarev (1853-1912) ideas regarding the reform of Russian state statistics. From 1903 to 1911 A.M. Zolotarev served as director of the Central Statistical Committee (CSC) of the Ministry of the Interior. A draft reform prepared on his initiative was submitted to the State Duma in 1908 and then rejected by the State Council in 1910. The structure of state statistics in the A.M. Zolotarev project was consistent with the resolutions of international statistical congresses, mainly the 6th (Florentine) congress of 1867. The outcome of this congress was taken into consideration by the ﬁrst head of the Central Statistical Bureau P.I. Popov (1872-1950) when establishing a centralized statistical system for Soviet Russia in 1918.In this work the author used materials of the Russian State Historical Archive (RGIA). Although those documents date back to the beginning of the XX century the range of issues that they cover still interest both international statistical community and scholars in Russia. For instance, the statisticians discuss the organization of local statistical bodies, the issues of centralization and decentralization of the statistical system, the subordination of oﬃcial statistics to other authorities and governing bodies. This article describes the historical context and aspects of establishing the statistical system in Russia and explores the inﬂuence of international practices on this process. In current conditions, this paper is relevant for deﬁning directions for reforming the statistics system today.
Experimental mineralogy : achievements and prospects
Authors: Yoder Hatten Schuyler 
Published: October 2019

Part I : One aspect of the progress in experimental mineralogy, the capability of sustaining in the laboratory the pressures and temperatures believed to exist in the earth, is reviewed, from Réaumur (1727) to the present. The dominance of the French schools in the earliest period of growth, the impact of Sir James Hall's study of the melting of calcite under pressure, the evolution of the principles of phase equilibria and their application to phase diagrams, and the importance of eutectics and crystal fractionation are highlighted. The early history of the quenching technique used in examining high-temperature phase equilibria, the pioneering development of apparatus that could withstand relatively high pressures, and the recognition of the role of volatiles in mineral synthesis and growth are described. The major developments of high-pressure apparatus include externally and internally heated gas-media devices, solid-media pressure vessels, simple squeezers, and the related diamond-anvil, high-pressure cells. Conditions equivalent to those at the core-mantle boundary can now be sustained in the laboratory.
Part II : As a result of the dramatic developments in high-pressure and high-temperature apparatus as well as in a wide variety of characterization techniques, at least eight major areas of basic research in experimental mineralogy are believed to be appropriate for expanded effort. These include (1) synthesis and characterization of mirerals and mineral assemblages stable in the mantle and core, (2) measurement of crystal structure at high pressures and temperatures simultaneously, (3) determination of the structure of silicate liquids and development of theories for nucleation and melting, (4) kinetics of mass transfer in crystals and liquids including crystal zoning, order-disorder, metasomatism, aggregation, convection, and mixing of magmas, as well as the diffusion and infiltration of elements through porous media under both stressed and hydrostatic conditions, (5) study of materials of minute dimension, especially the groundmass of igneous rocks, sea-bottom sediments, fibers, and clays, (6) characterization of organic minerals such as those in coal and particularly determination of the influence of living organisms on the growth of inorganic crystals (biomineralization), and (7) study of silicate systems in hydrogen at low pressures, simulating the condensation and aggregation of the primordial earth. The challenge of the future is primarily the discovery of mineral resources for the use of mankind. Basic research in (8) the principles of element concentration is considered the most important contribution to be made by the next generation of experimental mineralogists.
Further studies of Bohdanowiczite (AgBiSe2) and some associated minerals
Authors: Banas Marian , Atkin David , Bowles John F. W. , Simpson Peter R. 
Published: October 2019

Bohdanowiczite is a new mineral recently described from uranium-polymetallic mineralization which occurs in the vicinity of the magnetite bearing skarns of the Kletno fluorite deposit (Poland). The mineral occurs there intimately intergrown with other selenide and sulphide phases such as clausthalite and wittichenite. Microprobe analysis of the clausthalite shows that it contains 19 mol. % galena in solid solution which correlates with XRD and reflectance measurements. The copper bismuth sulphide occurring in this deposit is shown by microprobe analysis, XRD and reflectance measurements to be wittichenite not emplectite as previously supposed, and it contains only 2 wt % selenium. Similar studies of the bohdanowiczite show that it contains 17 mol. % of the matildite (AgBiS₂) molecule and that its cell size indicates the existence of a natural solid solution series between matildite and pure AgBiSe₂. The emulsion textures of this intergrowth and the chemical association indicate that first the wittichenite and later the bohdanowiczite were exsolved from an early clausthalite phase rich in Cu, Bi, Ag, S. The S/Se ratio of the bohdanowiczite has been strongly influenced by that of the host clausthalite but this has not influenced the wittichenite which shows distinct partitioning of Cu and S.
La comblainite, (Ni2+x, Co3+1-x)(OH)2(CO3)(1-x)/2 • y H2O, nouveau minéral du groupe de la pyroaurite
Authors: Piret Paul , Deliens Michel 
Published: October 2019

Comblainite occurs at Shinkolobwe, uranium deposit from Shaba, Zaïre. Turquoise blue cryptocrystalline crusts. Refractive indices : n'g = 1.690 and n'p = 1.684 with low birefringency. CO₂, H₂O and OH⁻ investigated by infrared spectrometry and thermogravimetry, Co and Ni by microprobe analysis, valence states of Ni and Co by ESCA. Chemical formula :
(Ni²⁺[x], Co³⁺[1-x])(OH)₂(CO₃)[(1-x)/2] • yH₂O,
with x near 2/3. Rhombohedral with a = 7.796 Å and a = 22.47°. Cell volume : 60.7 Å³. Strongest powder diffraction lines (d, I, hkl) : 7.64 Å (100) 003, 2.567 Å (70) 012 and 3.808 Å (50) 006. Structural group of pyroaurite and close similarity with takovite from Takovo (Serbia). Named after G. Comblain, mineralogist-technician (Musée royal de l'Afrique centrale, Tervuren).
Affinement de la structure de la vivianite Fe3(PO4)2• 8 H2O
Authors: Fejdi Pavel , Poullen Jean-François , Gasperin Madeleine 
Published: October 2019

La vivianite, Fe₃(PO₄)₂.8 H₂O, est monoclinique C2/m avec a = 10,086, b = 13,441, c = 4,703 Å ; β = 104,27° ; Z = 2. Sa structure, déjà décrite par Mori et Ito à partir d'intensités recueillies sur films a été redéterminée au moyen de données diffractométriques et affinée jusque R = 4,1 % pour 1 887 réflexions. Les résultats confirment le modèle précédent et permettent la mise en évidence de quatre liaisons hydrogène nécessaires à la stabilité du minéral.
Étude de l'acidité de produit poreux obtenus par traitement acide d'un minéral interstratifié mica vermiculite
Authors: Le Dred Ronan , Dominiak Philippe , Wey Raymond 
Published: October 2019

Le traitement acide d'un minéral interstratifié mica vermiculite, en paillettes de 1 à 4 mm², gonflées d'eau, conduit à des produits poreux (surface spécifique ≤ 630 m²/g, volume poreux ≤ 0,56 cm³/g).
La chimisorption d'ammoniac met en évidence des sites acides de Brönsted et de Lewis ainsi que d'autres sites adsorbants ne pouvant pas être assimilés avec certitude à des sites acides. Les sites acides de Brönsted (< 0,9 . 10⁻⁴ siteg/g SiO₂) ont pour origine les cations accessibles et hydratés de la charpente autres que les ions hydrogène et silicium. Les sites acides de Lewis (< 0,4. 10⁻⁴ siteg/g SiO₂) ont pour origine les ions aluminium accessibles et déshydratés. L'hydratation transforme les sites acides de Lewis en sites acides de Brönsted. Les autres sites adsorbants (< 10⁻⁴ siteg/g SiO₂) pourraient être des doubles ponts oxyde et des cavités. Les teneurs en sites et leur force acide dépendent des conditions de préparation des produits poreux.
Transmission electron microscope (TEM) study of geologically deformed potassic feldspars
Authors: Sacerdoti Michele , Labernadière Henri , Gandais Madeleine 
Published: October 2019

On présente des feldspaths provenant de granites schistosés. L'examen géologique de la roche suggère que la déformation s'est développée en régime de cisaillement simple en conditions des schistes verts de basse pression (pression de confinement d'environ 2 kbar, température inférieure à 500 °C). L'observation des feldspaths au microscope électronique en transmission révèle qu'ils ont été déformés principalement par glissement de dislocations ; un stade d'écrouissage s'est finalement instauré.
Orcelite and associated minerals in the Ni — Fe — As — S system in chromitites and orthopyroxenites of Nebral, Málaga, Spain
Authors: Oen Ing Soen , Kieft Cornelis , Burke Ernest Alexander Julius , Westerhof Aenaeus Bernardus 
Published: October 2019

Chromitites and orthopyroxenites at Nebral, Mâlaga, Spain, contain disseminated nickel arsenides and sulfides. The assemblage maucherite-pentlandite (25-30 at. % Ni)-heazlewoodite-parkerite equilibrated at inferred temperatures of 524-400 °C. Maucherite inclusions in heazlewoodite that are interpreted as exsolutions from Ni3 + xS2 and locally preserved contents of 1.4 wt % sulfur in maucherite suggest a precursor assemblage S-rich maucherite-pentlandite-Ni3±xS2 that existed between 610-524 °C. Possibly pentlandite was formed around 610 °C through reaction of monosulfide ss and Ni3±XS2. Later reactions with serpentinizing solution at inferred temperatures around 450 °C caused dissolution cracks in maucherite rims, iron-enrichment in maucherite and reaction rims of orcelite and orcelite-maucherite intergrowths around maucherite. Millerite was formed as P-NiS below 379 °C through replacement of heazlewoodite and pentlandite. Equilibration reactions at this stage tended to formation of an assemblage S-free maucherite-S-free orcelite-pentlandite (30-34 at. % Ni)-millerite-parkerite. The assemblage maucherite-orcelite-heazlewoodite that is stable at 450 °C is replaced at low temperatures by maucherite-orcelite-millerite. Replacement of pentlandite and millerite by violarite-polydymite represents the latest alterations.
Orcelite from Nebral is identical to synthetic Ni5_xAs2 and has a composition (Ni, Fe, Cu)4 4_4 2(As, S)2 0 with maximally 1.4 wt % Fe, 0.3 wt % Cu and 1.4 wt % S. Solid solution in orcelite extends to (As, S)-richer compositions than as indicated for the pure synthetic system.
Évolution minéralogique et chimique des bauxites au cours de leur genèse dans les gisements de l'Ariège (France)
Authors: Gout Robert , Klein Jean-Louis , Monchoux Pierre 
Published: October 2019

The beds of bauxite of Ariège are schematically constitued, from lying wall to hanging wall, of clays with kaolinite and hematite, red bauxites with prevailing diaspore and hematite, white bauxites with prevailing boehmite and little hematite.
Few red bauxites contain poorly crystallized diaspore which deshydrates at lower temperature than normal diaspore. This diaspore was synthetized by grinding gibbsite and goethite at 150 °C. The infrared spectrum suggests a hydrogen bond relatively weak which explains the lower temperature of dehydration.
The different varieties of diaspore and goethite presently known are compared.
The mineralogical and chemical data suggest the transformation of clays in red bauxites by leaching of only silica and crystallization of gibbsite, then the formation of white bauxite by leaching of only iron. After hiding, at approximatly 100 °C and 800 bars, diaspore forms in red bauxites and boehmite in white bauxites. In bauxites of Ariège, the iron concentration is one determinating factor in the formation of either monohydrate.
Cristallisation fractionnée d'un magma basaltique alcalin : la série de la Chaîne des Puys (Massif central, France). I. Pétrologie
Authors: Maury René Charles , Brousse Robert , Villemant Benoît , Joron Jean-Louis , Jaffrezic Henri , Treuil Michel 
Published: October 2019

The Chaîne des Puys (French Massif Central) volcanic series results from the fractional crystallization of mildly potassic alkali basalt, between 1,200 and 900 °C, under oxygen fugacities higher than the FMQ buffer and increasing with differentiation and under water pressures (less than total pressures) reaching several kilobars. The differentiation, characterized by an important increase of silica activity, leads to oversaturated residual liquids (quartziferous trachytes) through potassic hawaiites, mugearites and benmoreites ; it results mainly from the fractionation of plagioclase, clinopyroxene, amphibole and magnetite. It is shown that the increase of silica activity, well indicated by the mineralogy and the geochemistry of the lavas, does not result from crustal contamination, but from the fractionation of aluminous clinopyroxene and from the separation of kaersutitic amphibole at the level of the potassic mugearites.
HUBUNGAN PENGETAHUAN DAN SIKAP SISWI DENGAN PENANGANAN DISMENOREA DI SMA ISLAM AL-FALAH KOTA JAMBI TAHUN 2018
Authors: Ginting Marinawati 
Published: October 2019

Dismenorea merupakan salah satu gangguan menstruasi yang sering dialami wanita. Prevalensi dismenorea diperkirakan 45-90% di Amerika Serikat Tingginya angka tersebut diasumsikan dari berbagai gejala yang belum dilaporkan. Penelitian ini bertujuan untuk mengetahui hubungan pengetahuan dan sikap siswi dengan penanganan dismenorea di SMA Islam Al-Falah Kota Jambi Tahun 2018. Penelitian ini merupakan penelitian analitik. Populasi dalam penelitian ini adalah seluruh siswi kelas X dan XI SMA Islam Al-Falah Kota Jambi yang berjumlah 167 orang. Sampel dalam penelitian ini sebanyak 61 orang yang diambildengan teknik proportional random sampling. Penelitian ini dilaksanakan pada tanggal 06 Juni 2018 di SMA Islam Al-Falah Kota Jambi. Pengumpulan data menggunakan kuesioner. Data dianalisis secara univariat dan bivariat dengan uji statistik chi square.Hasil penelitian menunjukkan bahwa dari 61 responden, 27 responden (44,3%) memiliki pengetahuan cukup, 31 responden (50,8%) memiliki sikap tidak mendukung dan 30 responden (49.2%) melakukan penaganan disminorea tidak baik. Ada hubungan sikap siswi dengan penanganan dismenorea karena nilai p value (0,029) < 0,05.Diharapkan hasil penelitian ini dapat dijadikan sebagai gambaran dalam meningkatkan pelayanan kesehatan reproduksi remaja khususnya dalam melakukan penanganan dismenorea di SMA Islam Al-Falah Kota Jambi.
HUBUNGAN PENGHARGAAN, TANGGUNG JAWAB, PENGAWASAN, HUBUNGAN INTERPERSONAL TERHADAP MOTIVASI KERJA KADER POSYANDU DI WILAYAH KERJA PUSKESMAS SUNGAI BENGKAL KABUPATEN TEBO TAHUN 2017
Authors: Bunawar KMS 
Published: October 2019

Program posyandu merupakan strategi jangka panjang untuk menurunkan angka kematian bayi, angka kelahiran bayi, dan angka kematian ibu turunnya di suatu daerah merupakan standart keberhasilan pelaksanaan program terpadu di suatu wilayah tersebut. Untuk mempercepat penurunan angka tersebut diperlukan peran serta masyarakat dalam mengelola dan memanfaatkan posyandu karena posyandu adalah milik masyarakat,dilaksanakan oleh masyarakat dan ditujukan untuk kepentingan masyarakat.
Jenis Penelitian ini merupakan penelitian kuantitatif dengan rancangan penelitian cross sectional, dimana penelitian ini dilakukan untuk mengetahui faktor- faktor yang berhubungan dengan motivasi kerja kader Posyandu.. Populasi penelitian adalah seluruh kader posyandu diwilayah kerja Puskesmas Sungai Bengkal Kabupaten Tebo tahun 2017 berjumlah 140 orang dengan jumlah sampel 57 orang dengan melakukan wawancara menggunakan kuesioner pada kader posyandu. Cara pengambilan sampel yaitu Random Sampling.
Berdasarkan uji chi square di dapat P value 0,002 terdapat hubungan yang signifikan antara penghargaan dengan motivasi kerja Kader Posyandu, P value 0,001 terdapat hubungan yang signifikan antara tanggung jawab dengan motivasi kerja Kader Posyandu, P value 0,000 terdapat hubungan yang signifikan antara Pengawasan dengan motivasi kerja Kader Posyandu, P value 0,000 terdapat hubungan yang signifikan antara hubungan interpersonal dengan motivasi kerja Kader Posyandu, P value 0,000 terdapat hubungan yang signifikan antara hubungan interpersonal dengan motivasi kerja Kader Posyandu p di Wilayah kerja Puskesmas Sungai Bengkal Kabupaten Tebo Tahun 2017. analisis multivariat variabel yang memiliki pengaruh dengan motivasi kerja kader posyandu adalah variabel pengawasan dengan nilai OR 8.061 artinya kader dengan pengawasan yang memuaskan akan memiliki motivasi 8 kali lebih tinggi dari pada kader dengan pengawasan yang kurang memuaskan
Upaya yang dilakukan sebaiknya Agar dapat memberikan pembinanaan kepada kader posyandu secara rutin dan memberikan penghargaan-penghargaan bagi kader posyandu tidak selalu berbentuk insentif tetapi memberikan penghargaan dalam bentuk lain, contohnya seperti memberikan piagam atau piala pada lomba posyandu
HUBUNGAN UMUR PENGETAHUAN DAN PEKERJAAN IBU DENGAN PEMBERIAN ASI EKSKLUSIF DI PUSKESMAS KENALI BESAR KOTA JAMBI TAHUN 2018
Authors: Triseptinora Rica 
Published: October 2019

Pemberian ASI eksklusif merupakan salah satu upaya untuk memperoleh tumbuh kembang bayi yang baik. Karena ASI mengandung semua nutrisi penting yang diperlukan bayi untuk tumbuh kembangnya dan mengandung zat antibodi untuk kekebalan tubuh bayi. Seringkali ibu tidak dapat memberikan ASI kepada anaknya dengan baik disebabkan oleh banyak faktor. Kemudian capaian ASI eksklusif adalah 2 dari 5 bayi berusia dibawah 6 bulan mendapat ASI eksklusif dengan demikian masih jauh dan masih banyak bayi yang belum mendaptkan ASI ekslusif. Tujuan penelitian hubungan umur pengetahuan dan pekerjaan ibu dengan pemberian ASI Eksklusif di Puskesmas Kenali Besar Kota Jambi Tahun 2018.
Penelitian ini merupakan penelitian deskriptif kuantatif dengan rancangan Cross Sectional yaitu suatu penelitian yang dilakukan dengan tujuan melihat hubungan efek atau deskripsi tentang suatu keadaan secara objektif. Populasi dalam penelitian ini adalah seluruh ibu yang memiliki bayi umur lebih dari 6 bulan di Puskesmas Kenali Besar Kota Jambi Tahun 2018, dengan jumlah sampel 66 ibu yang memiliki bayi.
Simpulan penelitian adalah ada Ada hubungan umur dengan nilai p-value = 0,011 (p-value < 0,05), pengetahuan dengan nilai p-value = 0,039 (p-value < 0,05) dan pekerjaan ibu dengan nilai p-value = 0,002 (p-value < 0,05) terhadap pemberian ASI Eksklusif di Puskesmas Kenali Besar Kota Jambi Tahun 2018.
Saran penelitian adalah menjadi acuan bagi petugas kesehatan yang berkompeten di Puskesmas Kenali Besar untuk lebih meningkatkan pengetahuan ibu tentang meningkatkan perilaku ibu bekerja dalam pemberian ASI eksklusif antara lain tentang cara menyusui, memerah ASI, dan menyimpan ASI, sehingga dengan pengetahuan yang mereka miliki mereka mampu pemberian ASI eksklusif yang baik dan benar pada bayinya.