Bulk Deposition and Main Ionic Composition in a Remote Tropical Region: Nevado de Toluca, Mexico

2020 ◽  
Vol 231 (8) ◽  
Author(s):  
Diana Ibarra-Morales ◽  
Javier Alcocer ◽  
Luis A. Oseguera ◽  
Rodolfo Sosa-Echeverría
Keyword(s):  
Ionic Composition ◽  
Bulk Deposition ◽  
Tropical Region ◽  
Nevado De Toluca

The Role of the Interaction between Fe(III) and Cell Surface in the Accumulation of 67Ga by Tumor Cells

1991 ◽  
Vol 30 (06) ◽  
pp. 290-293 ◽  
Author(s):  
P. Maleki ◽  
A. Martinezi ◽  
M. C. Crone-Escanye ◽  
J. Robert ◽  
L. J. Anghileri
Keyword(s):  
Cell Surface ◽  
Tumor Cells ◽  
Ionic Composition ◽  
Iron Complex ◽  
Iron Binding ◽  
Complex Time ◽  
Interaction Product ◽  
Thermodynamic Constant ◽  
Number Of Cells

The study of the interaction between complexed iron and tumor cells in the presence of 67Ga-citrate indicates that a phenomenon of iron-binding related to the thermodynamic constant of stability of the iron complex, and a hydrolysis (or anion penetration) of the interaction product determine the uptake of 67Ga. The effects of various parameters such as ionic composition of the medium, nature of the iron complex, time of incubation and number of cells are discussed.

Factors Influencing the Separation of Glu-Plasminogen Affinity Forms I and II by Affinity Chromatography

1984 ◽  
Vol 52 (03) ◽  
pp. 347-349 ◽  
Author(s):  
Daan W Traas ◽  
Bep Hoegee-de Nobel ◽  
Willem Nieuwenhuizen
Keyword(s):  
Affinity Chromatography ◽  
Dissociation Constants ◽  
Ionic Composition ◽  
Chloride Ions ◽  
Factors Influencing ◽  
Two Factors ◽  
Human Plasminogen

SummaryNative human plasminogen, the proenzyme of plasmin (E. C. 3.4.21.7) occurs in blood in two well defined forms, affinity forms I and II. In this paper, the feasibility of separating these forms of human native plasminogen by affinity chromatography, is shown to be dependent on two factors: 1) the ionic composition of the buffer containing the displacing agent: buffers of varying contents of sodium, Tris, phosphate and chloride ions were compared, and 2) the type of adsorbent. Two adsorbents were compared: Sepharose-lysine and Sepharose-bisoxirane-lysine. Only in the phosphate containing buffers, irrespective of the type of adsorbent, the affinity forms can be separated. The influence of the adsorbent can be accounted for by a large difference in dissociation constants of the complex between plasminogen and the immobilized lysine.

SITE-SPECIFIC EQUATIONS OF STATE FOR COASTAL SEA AREAS AND INLAND WATER BODIES

2017 ◽  
Author(s):  
Natalia Andrulionis ◽  
Natalia Andrulionis ◽  
Ivan Zavialov ◽  
Ivan Zavialov ◽  
Elena Kovaleva ◽  
...  
Keyword(s):  
Equation Of State ◽  
Black Sea ◽  
Water Samples ◽  
Equations Of State ◽  
Sea Water ◽  
Ionic Composition ◽  
Water Bodies ◽  
Aral Sea ◽  
The Black Sea ◽  
Coastal Sea

This article presents a new method of laboratory density determination and construction equations of state for marine waters with various ionic compositions and salinities was developed. The validation of the method was performed using the Ocean Standard Seawater and the UNESCO thermodynamic equation of state (EOS-80). Density measurements of water samples from the Aral Sea, the Black Sea and the Issyk-Kul Lake were performed using a high-precision laboratory density meter. The obtained results were compared with the density values calculated for the considered water samples by the EOS-80 equation. It was shown that difference in ionic composition between Standard Seawater and the considered water bodies results in significant inaccuracies in determination of water density using the EOS-80 equation. Basing on the laboratory measurements of density under various salinity and temperature values we constructed a new equation of state for the Aral Sea and the Black Sea water samples and estimated errors for their coefficients.

Evaluación de la supervivencia en sitios reforestados como indicador de la restauración del paisaje en el Área de Protección de Flora y Fauna Nevado de Toluca

2019 ◽  
pp. 97-117
Author(s):  
Erika Rocío Reyes González ◽  
Gustavo Enrique Hernández Jardines ◽  
Atzin Elihu Calvillo Arriola
Keyword(s):  
San Jose ◽  
Pinus Montezumae ◽  
Pinus Hartwegii ◽  
Cerro Prieto ◽  
Sociedad Civil ◽  
Nevado De Toluca

Gran parte de los ecosistemas forestales del planeta han sufrido degradación principalmente por prácticas relacionadas con el cambio de uso de suelo para fines agropecuarios, incluida la tala ilegal. El Área de Protección de Flora y Fauna Nevado de Toluca no queda exenta de los efectos de la deforestación y la degradación del bosque templado. Instituciones de gobierno, academia y sociedad civil han emprendido acciones de restauración y recuperación en favor de esta área protegida. El objetivo de este trabajo es presentar los resultados de la evaluación de la supervivencia de 144 plantaciones realizadas por Reforestamos México, asociación civil sin fines lucrativos, durante los años 2011 a 2015. El índice de supervivencia propuesto por la Comisión Nacional Forestal (Conafor) para evaluar el éxito de las plantaciones estima la cantidad de árboles vivos y muertos para obtener el porcentaje de supervivencia de cada predio con base en el número de árboles plantados para las plantaciones de los años 2014 y 2015. Además, se midió el vigor de los árboles y se determinó la especie que presentó la mejor respuesta de crecimiento y desarrollo únicamente para las plantaciones de los años 2014 y 2015. Las mayores supervivencias se localizaron en los parajes Latas Viejas (82%), Cerro Prieto (79%) y San José de las Huertas (79%), municipio de Zinacantepec, Estado de México, mientras que la menor supervivencia (36%) fue localizada en el paraje Cerro Gordo, en el mismo municipio. Pinus montezumae fue la especie que logró la mayor supervivencia (73%), mientras que Pinus hartwegii obtuvo la menor (70%). Esto último puede estar asociado a las pendientes pronunciadas, los suelos compactados por anteriores usos de suelos, el crecimiento de herbáceas por un mal mantenimiento y la presencia de ganado, factores que limitaron la supervivencia de las plantas.

Ekstrak Biji Mahoni (Swietenia Mahogany (L.)Jacq) Untuk Pembuatan Obat Anti Nyamuk Elektrik

2018 ◽  
Vol 3 (1) ◽  
pp. 7
Author(s):  
Yuska Novi Yanti ◽  
Hepiyansori Hepiyansori
Keyword(s):  
Bitter Taste ◽  
Quality Parameters ◽  
Ash Content ◽  
Tropical Region ◽  
Mosquito Repellent ◽  
Standard Quality ◽  
Traditional Crops

<p>Indonesia daerah tropis yang baik untuk perkembangan jenis nyamuk sehingga membahayakan kesehatan. Indonesia kaya tanaman tradisional untuk  pengobatan. Salah Satunya Mahoni (Swietenia mahogany (L.)Jacq) pada bagian biji yang digunakan masyarakat untuk pengobatan malaria, diabetes, dan darah tinggi. Kandungan pada biji Mahoni yaitu saponin dan flavanoid dapat digunakan sebagai sediaan obat anti nyamuk. Sampel penelitian ini adalah biji mahoni yang diambil dari Taman Remaja Kota Bengkulu lalu di maserasi menggunakan pelarut metanol p.a dan etanol 96% selanjutnya ekstrak dibuat menjadi 3 konsentrasi ekstrak yaitu 1%, 3% dan 5%. Kemudian dibuat keping anti nyamuk dan di buat obat anti nyamuknya, dilanjutkan dengan pengujian evalusi ekstrak meliputi uji organoleptis, uji kadar abu dan uji rendemen kemudian pengujian evalusi sediaan yang meliputi uji organoleptis, uji keping anti nyamuk dan uji ketahanan sediaan. Hasil penelitian didapatkan, ekstrak metanol biji mahoni dapat mempengaruhi sifat fisik sediaan keping nyamuk, Ekstrak biji mahoni berwarna coklat sampai kemerahan, memiliki bau khas (aroma kacang tanah), konsistensi cukup padat sedikit berminyak dan berasa pahit. Uji parameter standar menghasilkan data untuk rendemen sebesar 0,8235% untuk metanol dan 0,6747% untuk etanol, kadar abu untuk metanol 1,249% dan untuk etanol 1,022%. sehingga ekstrak metanol biji mahoni dapat dibuat menjadi sediaan keping anti nyamuk.</p><p><em>Indonesia tropical region places the development  some mosquitoes that endanger health. Indonesia traditional crops can used for treatment. Mahoni (Swietenia mahogany (L.)Jacq)  a plant which usually treatment. Especially   part of the seed malaria drugs, diabetes and high blood pseasure.That in the seeds of mahoni there is saponin and flavonid can be used as a mosquito repellent. The sample this research is seeds mahoni taken from the Remaja Bengkulu Pares. Processed  maserasi with methanol solvent p.a and ethanol 96% next methanol made to 3 concentration an extract that 1%, 3% and 5%. Created pieces of mosquito repellent and mosquito repellent that followed terts the evaluation of extract. covers organoleptis, ash content and rendemen and testing performed and evaluation dosage, includes organoleptis, pieces  mosquito repellent and dosage resutance.Result experiment is extract methanol seeds mahoni 82,35 gram and extract ethanol seeds mahoni 67,47 gram. Extract colored from dark brown to reddish, have peanut like aroma, adequate compact consistency, bitter taste and not sticky in hand. The result of standard quality parameters rendemen extract methanol 0,8235% and rendemen extract ethanol 0,6747%, ash content extract methanol 1,247% and ash content extract ethanol 1,022%. so that the extract of methanol mahogany seeds can  made into anti-mosquito </em></p>

scholarly journals Ion-Induced Volume Transition in Gels and Its Role in Biology

Gels ◽  
2021 ◽  
Vol 7 (1) ◽  
pp. 20
Author(s):  
Matan Mussel ◽  
Peter J. Basser ◽  
Ferenc Horkay
Keyword(s):  
Nonlinear Response ◽  
Structural Changes ◽  
Ionic Composition ◽  
Biological Systems ◽  
Experimental Results ◽  
Resting Potential ◽  
Cell Secretion ◽  
Solvent Quality ◽  
Volume Transition ◽  
Biological Milieu

Incremental changes in ionic composition, solvent quality, and temperature can lead to reversible and abrupt structural changes in many synthetic and biopolymer systems. In the biological milieu, this nonlinear response is believed to play an important functional role in various biological systems, including DNA condensation, cell secretion, water flow in xylem of plants, cell resting potential, and formation of membraneless organelles. While these systems are markedly different from one another, a physicochemical framework that treats them as polyelectrolytes, provides a means to interpret experimental results and make in silico predictions. This article summarizes experimental results made on ion-induced volume phase transition in a polyelectrolyte model gel (sodium polyacrylate) and observations on the above-mentioned biological systems indicating the existence of a steep response.

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