scholarly journals Aportaciones didácticas al origen de la pirita en el Barranco de las Cañadas (Paraje del Pizcalejo, Caravaca-Murcia). Estudio en un laboratorio de Educación Secundaria

2019 ◽  
pp. 47-58
Author(s):  
José Pedro López Pérez ◽  
Raquel Boronat Gil
Keyword(s):  
Hydrogen Sulfide ◽  
Secondary Education ◽  
The Other ◽  
Bacterial Metabolism ◽  
Biological Production ◽  
Basic Study ◽  
Practical Activity ◽  
Sedimentary Environments ◽  
Production Of Hydrogen ◽  
The Matrix

Resumen Este trabajo describe una actividad en un laboratorio de educación secundaria que, por un lado pone de manifiesto la producción biológica de ácido sulfhídrico mediante la reducción de sulfitos a microescala, introduciendo para ello el estudio básico del metabolismo bacteriano responsable y, por otro, lo relaciona con la génesis incipiente de las piritas sedimentarias. Esta actividad práctica, destinada a alumnos de segundo ciclo de ESO y Bachillerato, también ayuda a recrear multitud de manifestaciones geológicas halladas en el área del Barranco de las Cañadas (Paraje del Pizcalejo, Caravaca-Murcia), así como postular lo que podría hallarse en la matriz de rocas procedentes de ambientes sedimentarios semejantes. Abstract This paper present a activity in the compulsory secondary education laboratory that, on one hand, reproduces biological production of hydrogen sulfide by reducing sulfites at microscale, introducing the basic study of the responsible bacterial metabolism and, on the other hand, its relationship with the incipient genesis of sedimentary pyrites. This practical activity, destined to students in the second cycle of ESO and A-level (Bachillerato), also helps to recreate a multitude of geological manifestations found in the Barranco de las Cañadas area (Paraje del Pizcalejo, Caravaca-Murcia), and postulate what could be found in the matrix of rocks from similar sedimentary environments.

Pembobotan Berdasarkan Tingkat Kesamaan Semantik pada Metode Fuzzy Semi-Supervised Co-Clustering untuk Pengelompokkan Dokumen Teks

2014 ◽  
Vol 6 (2) ◽  
pp. 46-51
Author(s):  
Galang Amanda Dwi P. ◽  
Gregorius Edwadr ◽  
Agus Zainal Arifin
Keyword(s):  
Supervised Learning ◽  
Semantic Similarity ◽  
The Other ◽  
Classification Result ◽  
Document Similarity ◽  
The Matrix ◽  
Index Terms ◽  
Membership Value ◽  
Degree Of Similarity

Nowadays, a large number of information can not be reached by the reader because of the misclassification of text-based documents. The misclassified data can also make the readers obtain the wrong information. The method which is proposed by this paper is aiming to classify the documents into the correct group.  Each document will have a membership value in several different classes. The method will be used to find the degree of similarity between the two documents is the semantic similarity. In fact, there is no document that doesn’t have a relationship with the other but their relationship might be close to 0. This method calculates the similarity between two documents by taking into account the level of similarity of words and their synonyms. After all inter-document similarity values obtained, a matrix will be created. The matrix is then used as a semi-supervised factor. The output of this method is the value of the membership of each document, which must be one of the greatest membership value for each document which indicates where the documents are grouped. Classification result computed by the method shows a good value which is 90 %. Index Terms - Fuzzy co-clustering, Heuristic, Semantica Similiarity, Semi-supervised learning.

Joseph Proudman, 30 December 1888 - 26 June 1975

1976 ◽  
Vol 22 ◽  
pp. 319-333 ◽  
Keyword(s):  
Secondary Education ◽  
Secondary School ◽  
Primary School ◽  
The Other ◽  
Technical School ◽  
Tenant Farmer

Joseph Proudman was born on 30 December 1888 at Thurston Fold Farm, Unsworth, near Bury in Lancashire. His father was then a farm bailiff; from 1898 to his death in 1943 he was a small tenant farmer at Bold, near Widnes in Lancashire. Joseph Proudman attended primary school at Unsworth from 1894 to 1898, and at Bold from 1898 to 1902. From 1902 to 1907 he was a pupil-teacher at Farnworth primary school between Bold and Widnes. He tells us that in 1902 his salary was £6 10s. Od. per year, and in 1907 it was £24 per year. His secondary education was begun by the headmaster, A. R. Smith, who gave him a lesson each morning from 8 to 8.45 before the school opened at 9. During the winters of 1902-4 he attended evening classes at the Widnes Technical School, studying art, mathematics and physiography. From 1903 to 1907 he only taught for half of each week; the other half he attended classes at the Widnes Secondary School. This was an excellent school, and it was here that the mathematical bent of his life was determined. From that time onwards his chief recreation became reading, especially the reading of history. One result of this interest was the writing of the unusually full autobiographical papers, of which the present writers have made much use.

MET2 affects production of hydrogen sulfide during wine fermentation

2014 ◽  
Vol 98 (16) ◽  
pp. 7125-7135 ◽  
Author(s):  
Chien Huang ◽  
Miguel Roncoroni ◽  
Richard C. Gardner
Keyword(s):  
Hydrogen Sulfide ◽  
Wine Fermentation ◽  
Production Of Hydrogen

Matrix-Mineral Relationships-A. Morphologist's Viewpoint

1979 ◽  
Vol 58 (2_suppl) ◽  
pp. 922-929 ◽  
Author(s):  
M.U. Nylen
Keyword(s):  
Organic Material ◽  
Crucial Role ◽  
Crystal Surface ◽  
Organic Matrix ◽  
The Other ◽  
Enamel Matrix ◽  
Initial Cell ◽  
Cell Product ◽  
Ultrastructural Morphology ◽  
The Matrix

The literature on the ultrastructural morphology of the enamel matrix and its relationship to the crystals is reviewed. Two morphological entities of the matrix are discussed: One is the so-called stippled material which may be the initial cell product; the other, variously described as fibrillar, lamellar, tubular or helical, is thought by many to play a crucial role in nucleation and orientation of the crystals. A number of observations, however, suggest that the latter structures form secondarily to the crystals and that in reality they represent organic material adsorbed to the crystal surface and maintained as independent structures upon removal of the mineral. The need for additional studies is stressed including systematic studies of interactions between constituents of the organic matrix and the apatite crystals.

scholarly journals Application of Ozone and Oxygen to Reduce Chemical Oxygen Demand and Hydrogen Sulfide from a Recovered Paper Processing Plant

2010 ◽  
Vol 2010 ◽  
pp. 1-6 ◽  
Author(s):  
Patricia A. Terry
Keyword(s):  
Hydrogen Sulfide ◽  
Chemical Oxygen Demand ◽  
Contact Time ◽  
Oxygen Demand ◽  
Gas Production ◽  
Injection System ◽  
Processing Plant ◽  
Short Contact Time ◽  
Production Of Hydrogen ◽  
Fox River

A pilot study was performed at the Fox River Fiber recovered paper processing company in DePere, Wisconsin, to determine the extent to which injection of oxygen and ozone could reduce the high chemical oxygen demand, COD, in the effluent and the effectiveness of the ozone/oxygen stream in suppressing production of hydrogen sulfide gas in downstream sewage lines. Adaptive Ozone Solutions, LLC, supplied the oxygen/ozone generation and injection system. Samples were analyzed both before and after oxygen/ozone injection. Hydrogen sulfide gas was continuously monitored at sewer stations downstream of Fox River Fiber. Results showed that with a very short contact time, effluent COD was reduced by over 15%. A simple kinetic model predicts that a contact time of fewer than 30 minutes could reduce COD by as much as 60%. In addition, downstream hydrogen sulfide gas production in the sewage mains was also better controlled, such that costly Bioxide applications could be reduced.

A Yield Criterion of Porous Materials With Anisotropy Caused by Geometry or Distribution of Pores

1991 ◽  
Vol 113 (4) ◽  
pp. 425-429 ◽  
Author(s):  
T. Hisatsune ◽  
T. Tabata ◽  
S. Masaki
Keyword(s):  
Velocity Field ◽  
Porous Materials ◽  
Upper Bound ◽  
Volume Fraction ◽  
Yield Criterion ◽  
Longitudinal Direction ◽  
Axisymmetric Deformation ◽  
The Other ◽  
The Matrix ◽  
Spherical Cells

Axisymmetric deformation of anisotropic porous materials caused by geometry of pores or by distribution of pores is analyzed. Two models of the materials are proposed: one consists of spherical cells each of which has a concentric ellipsoidal pore; and the other consists of ellipsoidal cells each of which has a concentric spherical pore. The velocity field in the matrix is assumed and the upper bound approach is attempted. Yield criteria are expressed as ellipses on the σm σ3 plane which are longer in longitudinal direction with increasing anisotropy and smaller with increasing volume fraction of the pore. Furthermore, the axes rotate about the origin at an angle α from the σm-axis, while the axis for isotropic porous materials is on the σm-axis.

NO, CO and H2S based pharmaceuticals in the mission of vision (eye health): a comprehensive review

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Jan Mohammad Mir ◽  
Ram Charitra Maurya ◽  
Mohd Washid Khan
Keyword(s):  
Nitric Oxide ◽  
Carbon Monoxide ◽  
Human Physiology ◽  
Hydrogen Sulfide ◽  
The Other ◽  
Normal Functioning ◽  
Comprehensive Review ◽  
Molecular Systems ◽  
Eye Health ◽  
Highly Sensitive

Abstract A set of well defined signaling molecules responsible for normal functioning of human physiology including nitric oxide along with carbon monoxide and hydrogen sulphide are referred as “gasotransmitters”. Due to their involvement in almost every system of a human body, the care of highly sensitive organs using these molecules as drugs represents highly fascinating area of research. In connection with these interesting aspects, the applied aspects of these gaseous molecules in maintaining healthy eye and vision have been targeted in this review. Several examples of eye-droppers including NORMs like latanoprost and nipradiol, CORMs like CORM-3 and CORM-A1, and Hydrogen sulfide releasing system like GYY4137 have been discussed in this context. Therefore the relation of these trio-gasotransmitters with the ophthalmic homeostasis on one hand, and de-infecting role on the other hand has been mainly highlighted. Some molecular systems capable of mimicking gasotransmitter action have also been introduced in connection with the titled theme.

Wounded by reality: emotional deprivation and unresolved trauma in psychoanalytical couple’s therapy

2021 ◽  
Vol 15 (2) ◽  
pp. 253-268
Author(s):  
Hélène Béïnoglou
Keyword(s):  
Romantic Relationships ◽  
Emotional Experience ◽  
Therapeutic Process ◽  
Clinical Work ◽  
The Other ◽  
The Matrix ◽  
Emotional Deprivation ◽  
Unresolved Trauma

In this article, I will focus on highly conflictual couples with extensive emotional deprivation and unresolved trauma, which prevents them from developing healthy romantic relationships and overcoming the challenges entailed in any intimate attachment. I will describe how everyday interactions are experienced as threatening or even lethal movements between the partners. The question which arises in the psychoanalytical therapeutic process is how to help the couple tolerate the sensory reminders of the unresolved trauma as a necessary precursor to any process of symbolisation. In order to provide a safe enough therapeutic attachment bond, extensive time is dedicated to the emotional experience of self and the other in the here-and-now of the session, which validates the emotional experience of the couple as well as contains it. The therapy focuses on the transferential and countertransferential movements inspired by the matrix of the victim, abuser, and uninvolved witness (Davies & Frawley, 1994) to elaborate the intertwining of the unresolved trauma with the couple’s form of attachment. In order to illustrate my argument, I present two examples: one from a fictional narration and another from my clinical work.

Sign in / Sign up

Export Citation Format

Share Document