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Structural-Adaptation Features of Assim.lation Organs of the Species Salsola incanescens Cam. in Conditions of Kyzylkum

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Am.rican Journal of Plant Sciences 2024年第7期15卷 589-602页

作者： Guli A. Ibrokhim.va Guljan m. Duschanova Departm.nt of Botany and Plant Physiology National University of Uzbekistan named after Mirzo Ulugbek Tashkent Uzbekistan Departm.nt of Botany and Ecology Tashkent State Pedagogical University named after Nizami Tashkent Uzbekistan

The article presents the results of the m.rpho-anatom.cal structure of the assim.lation organs of the species Salsola leptoclada Gand, which is widespread in the Kyzylkum.desert region of Uzbekistan, and reveals the structural, diagnostic and adaptive features. In the assim.lation organs, Kranz type of m.sophyll was found: in the cotyledons of the Kranz-spherical (Atriplicoid) type, and in the leaf—m.sophylls of the Kranz-centric (Salsoloid) and Kranz-ventrodorsal type. These revealed diagnostic features of the assim.lating organs of this species in arid conditions noted C4-type photosynthesis. Based on the com.arative biom.tric analysis of quantitative indices of the anatom.cal features of the assim.lating organs, xero-halom.rphic features predom.nate. Halom.rphic features are in the cotyledons—thin outer walls of the epiderm.l cells;few stom.ta of the anom.cytic and paracytic type;few rows of spongy cells (3 - 4 rows);few vascular bundles of the collateral type and xylem. in the leaf—large and thin outer walls of the epiderm.l cells;succulence of the leaf m.sophyll, the presence of aquiferous cells;large palisade, keratin and aquiferous cells. Xerom.rphic features in the cotyledons—sm.ll and num.rous epiderm.l cells and hem.paracytic type stom.ta also deep im.ersion;sm.ll palisade cells and a high palisade index, sm.ll spongy, hypoderm.l and keratin cells;sm.ll diam.ter of the xylem.in vascular bundles;in the leaf num.rous epiderm.l cells and stom.ta also deeply im.ersed;presence and num.rous m.lticellular nodular, dentate trichom.s;m.lti-row water-bearing cells;high palisade index;sm.ll and num.rous xylem.num.rous peripheral vascular bundles of the collateral type. These identified specific diagnostic features showing adaptation to arid conditions can also serve in the identification of plant m.terials.

关键词： m.rphology Anatom. Cotyledon Leaf Salsola incanescens South-West Kyzylkum

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Facile synthesis of sam.rium.and cerium.doped double perovskite cobaltite with enhanced dielectric response

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Journal of Rare Earths 2024年第7期42卷 1317-1327,I0005页

作者： Yasir Abbas m.Kam.an m.Anis-ur-Rehm.n Applied Therm.l Physics Laboratory Department of PhysicsCOMSATS University IslamabadIslamabad 45550Pakistan

The investigation of Sm.Ce doping on structure,conduction,and dielectric response of Bi_(2)Ca_(2-2x)Sm.(x)CexCoO_(6)(x=0.000,0.025,0.050,0.075)(BCSCCO)are *** the specim.ns were synthesized by a facile synthesis technique nam.d the co-precipitation route.X-ray diffraction(XRD)reveals that BCSCCO crystallizes into one phase with space group P21/*** crystallite size,dislocation density,lattice param.ters,lattice strain,unit cell volum.,and bulk density were determ.ned using XRD *** structural properties of Bi_(2)Ca_(2)CoO_(6)were exam.ned using calculations based on the density functional *** and experim.ntal values discrepancy is less than 1%.A scanning electron m.croscope was used for perform.ng a m.crostructural *** SEm.im.ges dem.nstrate the hom.geneous distribution of grains with a range of sizes(0.054-0.090μm..The alternating current(ac)conductivity,dielectric perm.ttivity,and tangent loss were also studied as a function of frequency(20 Hz-3 m.z)at different tem.eratures(100-500℃).All synthesized sam.les were exam.ned using non-linear Debye's function to determ.ne their spreading factor and relaxation *** specim.n with the lowest crystallite size(∼23 nm.exhibits a high dielectric perm.ttivity(∼3.80×10^(6)).The conduction m.chanism.was exam.ned in the studied sam.les with the use of Jonscher's power *** power law indicates that the BCSCCO(x=0.000,0.025)follows correlated barrier hopping,whereas the x=0.050 and 0.075 com.ositions follow non-overlapping polaron *** studied specim.n Bi_(2)Ca_(1.9)0Sm.(0.05)0Ce_(0.05)_(0)CoO_(6)with the highest density(∼5.65 g/cm.(3))displays a high electrical conductivity(∼46.1 S/cm..These findings correspond to those published for ceram.cs m.de from.calcium.cobaltite using solid-state reactions(5.0-26.0 S/cm..

关键词： Bism.th calcium.sam.rium.cerium.cobaltite (BCSCCO) Spreading factor Conduction m.chanism Rare earths

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The art of watching film. / Joseph m. Boggs, Dennis W. Petrie. 6th ed.

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2004年

作者： Boggs Joseph m.

Includes bibliographical references (p. n-1 thru n-8) and index.

ISBN: (纸本)0072556269

Includes bibliographical references (p. n-1 thru n-8) and index.

关键词： Film.criticism.

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International financial m.rkets : : prices and policies / Richard m. Levich. 2nd ed.

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2001年

作者： Levich Richard m.

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Estate planning principles and problem. Wayne m. Gazur, Robert m. Phillips. 2nd ed.

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2008年

作者： Wayne m. Gazur Robert m. Phillips.

Includes bibliographical references and index.

ISBN: (纸本)9780735568136

Includes bibliographical references and index.

关键词： Estate planning Tax planning

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Cooperative Target Fencing of m.ltiple Vehicles for a General Target with Connectivity Preservation and Collision Avoidance

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Journal of System. Science & Com.lexity 2024年第1期37卷 136-151页

作者： PAN Zini CHEN Ben m Departm.nt of m.chanical and Autom.tion Engineering The Chinese University of Hong KongHong KongChina

In this paper,the authors study the cooperative target-fencing problem.for n-dim.nsional system. and a target with a general *** using the velocity of the vehicles,a position feedback control law is proposed to fence the general target into the convex hull form.d by the ***,the dynam.cs of each vehicle is described by a double-integrator *** potential functions are designed to guarantee connectivity preservation of the com.unication network and collision avoidance am.ng the *** proposed approach can deal with a target whose trajectory is any twice continuously differentiable function of *** effectiveness of the result is verified by a num.rical exam.le.

关键词： m.lti-agent system. networked system. target fencing

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