نتایج جستجو برای: cation

تعداد نتایج: 55682  

1999
Jia Li Robert M. Gray

This paper presents an image classi cation algorithm using a multiresolution two dimensional hidden Markov model (HMM). The multiresolution two dimensional hidden Markov model is an extension from the two dimensional hidden Markov model for image classi cation. A classi er estimates model parameters using the EM algorithm. Classi cation is then performed according to the maximum a posteriori pr...

ژورنال: علوم آب و خاک 2015
اسکندری, ذبیح‌الله, بحرینی‌نژاد, بابک, جعفری‌اردکانی, علی, پارسادوست, فرزاد,

Evaluation of chemical and biological indicators of soil in different land uses could be helpful in sustainable range management, preventing degradation of soil quality trend. This study was conducted in Friedan in Isfahan province in 2010 to compare chemical and biological indicators in three land uses (rangeland, degraded dry land and dry land), during two growing seasons (May and September) ...

Khalilollah Taheri Maryam Davardoost Manesh,

The complexation reaction between hydroxyl ammonium (HONH3+ ) cation with 18-crown-6 (18C6) ligand was studied in dimethylsulfoxide – water (DMSO-H2O), methanol – water (MeOH-H2O) and dimethylformamid – methanol (DMF-MeOH), binary solutions at different temperatures using conductometric method. The obtained results show that the stoichiometry of t...

H Valizadeh J Akbari K Morteza-Semnani M Saeedi M Tahernia R Enayatifard

The aim of this study was to develop an extended-release tablet formulation using a new in situ cross-linking method. The effects of polyvalent cations on theophylline release from tablets made with the polyanionic polymers sodium alginate and sodium carboxymethylcellulose, were investigated. Different miliequivalents of the di and tri-valent cation, Ca2+ and Al3+, were added to tablet form...

J. Izadyar

In the Asemi-gawa area of intermediate high-pressure and low-temperature Sanbagawa metamorphic belt in central Shikoku, Japan, piemontite-quartz schists are common in which cation exchange between piemontite and garnet has been studied. Piemontite in contact with garnet usually contains two zones in which core is enriched in Mn3+ and surrounded by a rim rich in Fe3+. Garnet is Ca-Fe-bearing spe...

Journal: :Plant physiology 1978
R C Jennings G Forti P D Gerola F M Garlaschi

Trypsin digestion of photosynthetic membranes isolated from spinach (Spinacia oleracea L.) leaves eliminates the cation stimulation of chlorophyll fluorescence. High concentrations of cations protect the fluorescence yield against trypsin digestion, and the cation specificity for this protection closely resembles that required for the stimulation of fluorescence by cations. Trypsin digestion re...

2009
Nabila Moussa Slimane Aouatef Cherouana Lamia Bendjeddou Slimane Dahaoui Claude Lecomte

In the title compound, C(4)H(9)N(2)O(3) (+)·NO(3) (-), alternatively called (1RS)-2-carbamoyl-1-carboxy-ethanaminium nitrate, the asymmetric unit comprises one asparaginium cation and one nitrate anion. The strongest cation-cation O-H⋯O hydrogen bond in the structure, together with other strong cation-cation N-H⋯O hydrogen bonds, generates a succession of infinite chains of R(2) (2)(8) rings al...

1999
Chikashi Nobata Nigel Collier Jun-ichi Tsujii

The rapid growth of collections in online academic databases has meant that there is increasing di culty for experts who want to access information in a timely and e cient way. We seek here to explore the application of information extraction methods to the identi cation and classi cation of terms in biological abstracts from MEDLINE. We explore the use of a statistical method and a decision tr...

1997
Hanêne Ben-Abdallah Duncan Clarke Insup Lee Oleg Sokolsky

| The PARAGON toolset provides an environment for the modular and hierarchical design of resource-bound, real-time systems. It ooers well-integrated graphical and textual speciication languages with formal semantics. Both languages are based on the Algebra of Communicating Shared Resources (ACSR), a process algebra with explicit notions of time, resources and priority. The integration of the th...

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