bluuebunny/crossref_metadata_2025 huggingface dataset:
Эрдэнэтийн овоо ордын молибденитийн эрдэсд агуулагдах MoS2 нэгдлийн кристалл бүтцийн судалгаа
Authors: Л Ням-Очир , Ч Дашжаргал , Ц Туяа , Л Энхтөр , Р Галбадрах , Ж Даваасамбуу
Published: March 2023

"Эрдэнэтийн овоо" ордын халькопирит, молибденит, пиритийн дан эрдсийн дээжүүдийг нунтгийн рентген дифракцын аргаар судалж, дээжүүдэд агуулагдах кристалл бүтцүүдийг кристалл фазын чанарын анализаар тогтоов. Халькопиритийн дээжид эгэл тор нь тетрагональ сингонийн огторгуйн симметрийн l-42d групптэй CuFeS2 кристалл, молибденитийн дан дээжид эгэл тop нь гексагональ, РбЗ/mmс огторгуйн групптэй болон ромбоэдр эгэл тортой R3m огторгуин групп бүхий MoS2 кристаллын хоёр өөр кристалл зэрэгцэн байгааг тогтоов. Пиритийн дээжид куб эгэл тортой, Ра-3 огторгуйн групптэй FeS2 кристалл бүтэц байгаа үр дун гарлаа. Молибденитийн дээжид агуулагдах MoS2 нэгдлийн хоёр төрлийн кристалл бүтцийн харьцангуй агуулгыг Ритвельдийн аргад үндэслэсэн тоон анализаар гексагональ тортой MoS2 кристалл 69.9(1) %, ромбоэдр тортой MoS2 кристалл 30.1(1) % агуулгатай байгааг тогтоов.
Нарны идэвхт үзэгдлийн физик параметрүүдийг CFM аргаар тодорхойлоход үүсгүүрийн функцэд оптик зузааныг тооцох
Authors: Ч Мөнхжаргал , Д Батмөнх , Б Батбаяр
Published: March 2023

We presented some results about the physical parameters, derived with the cloud model taking into account the dependence of source function on the optical depth for solar absorption features. The dependence of source function on the optical depth is represented in the form Sv(tv) = a( 1 + tn v). The parameter fitting is achieved by iterative Levcnberg-Marquardt method for nonlinear dependences. The results of calculation were compared with the results obtained with the constant source function. Our results show that the dependence of source function on the optical depth very strongly influences the values of the optical thickness. Therefore because of decrease of the optical thickness the arch-filament system became thin than with constant source function. From the calculation for the filaments shows that the greatly reduced values of N2 ,Ne, and vice versa, Te increases.
B(N) redor and B spin echo studies for structural charactreization of Si-B-N precursor ceramics
Authors: Ts Otgontuul
Published: March 2023

A Solid-state NMR spectroscopy is employed for the structural characterization oj precursorderived Si-B-C-N ceramics. Particular emphasis is given to the structural composition of the BNCx phase which plays a key role for the unusual high temperature stability of these materials. In the present work nB('5N) REDOR and B spin echo experiments are presented for two /SN enriched precursor systems, made from substituted polysilazanes and polvsilvlcarbodiimides. which provide interatomic boron-boron and boron-nitrogen distances. The obtained results are compatible with the presence of layered structures as reported for hexagonal boron nitride [h-BJ. The derived boron-nitrogen and boron-boron distances, however, are larger than in h-BN, reflecting some layer distortions. The boron-boron distances are found to decrease with increasing pyrolysis temperature, whereas the boron-nitrogen distances remain practically unaltered at elevated pyrolysis temperatures. On the basis of the present results it is concluded that intercalated BN.and sp2-carbon layers most likely constitute the BNCX. phase. The graphite-like carbon layers are assumed to create some internal pressure, which in turn is responsible for the observed interatomic distance increase in the BN layers. However, other scenarios, like the direct incorporation of small sp1-carbon domains into the BN-sheets, cannot be ruled out completely. Further work along this line appears to be necessary to develop a comprehensive structural model for the BNCxphase in such quarternarv ceramic systems.
Phase transition from quark-gluon plasma to matter after the big bang
Authors: Ch Sodbileg
Published: March 2023

The dependence of the energy density distribution around a quark and an antiquark as a function of temperature has been studied in this work. Temperature range was 0.7-1.3 times the critical temperature of the phase transition from a hadronic matter to quark gluon plasma. Using Monte Carlo numerical simulation we have found that above the critical temperature wc can observe a quark as a single particle.
Структурирование Полимеров Фуллеренами
Authors: Э. М. Шпилевский  , С. А. Филатов  , Г. Шилагарди  , П. Тувшинтур  , Ц. Хандмаа  , А. Т. Богорош
Published: March 2023

Структурирование Полимеров Фуллеренами
Альфа Төмрийн Уян Харимхайн Тогтмолуудыг Фононы Спектрээс Тооцоолох нь
Authors: А. Дулмаа  , Н. Цогбадрах  , Ragchaa Galbadrakh
Published: March 2023

Борн–вон–Карманы онолоор эзлэхүүн төвлөсөн шоо (ЭТШ) тогтоцтой -Fe монокристаллын фононы спектрын [100]L, [100]T, [110]L ба [111]T чиглэлийн дагуу фиттинг хийж уян харимхайн тогтмолуудыг тооцоолох боломжтой болохыг харуулав.
Цахилгаан Статик Шүүлтүүрийн Шүүх Чадварыг Түүний Хэлбэр Хэмжээтэй Уялдуулан Тооцоолох нь
Authors: Jigmeddorj Vanchinkhuu , Б.Бат-эрдэнэ
Published: March 2023

Цахилгаан шүүлтүүрийн шүүлтийн коэффициентийг онолоор тодорхойлж шүүлтийн коэффициент шүүлтүүрийн хэлбэр хэмжээ, хийн урсгалын хурд, бөөмцрийн хэмжээнээс хэрхэн хамаарч байгааг судлав. Шүүлтүүрийн хөндлөн огтлолыг ерөнхий тохиолдолд олон өнцөгт байна гэж үзвэл олон өнцөгтийн талын тоо буурахад шүүлтийн коэффициент нэмэгдэх бөгөөд адилт талт гурвалжны хувьд шүүлт хамгийн их, тойрог огтлолын хувьд хамгийн бага байна. Мөн шүүлтийг бөөмцрийн хэмжээнээс хамааруулан судалж бөөмцрүүдийн хувьд шүүлтийн коэффициент эрс багасахыг тогтоов. Шүүлтийн коэффициентийн утга хийн урсгалын хурд ба дрейфийн хурдны харьцаанаас хамаарах бөгөөд энэ харьцаа бага байх тусам шүүлт нэмэгдэнэ.
Берлинитийн харимхайн тогтмол болон пьезо-электрик коэффициентийн онолын тооцоолол
Authors: Norovsambuu Tuvjargal , Jav Davaasambuu , П. Дашдэмбэрэл  , Ш. Чадраабал
Published: March 2023

Бид энэхүү ажлаар Берлинитийн харимхайн тогтмолууд, пьезо-электрик коэффициентүүдийг ab-initio квант механикийн аргаар CRYSTAL14 программ ашиглан тооцоолов. Бидний тооцоолсон үр дүнгүүд бусад тооцооны болон туршилтын үр дүнгүүдтэй сайн тохирч байна. Түүнчлэн уг системийн хувьд эзэлхүүн шахалтын модуль B, шилжилтийн модуль G, Юнгийн модуль E, Пуассоны харьцаа v болон Дебайн температурыг тодорхойлов.
Шаталтын Механизм ба Утаагүй Зуух
Authors: С Дамдинсүрэн , Н Баатарбилэг
Published: March 2023

Агаар дахь нүүрстөрөгчийн давхар ислийн концентраци хэдэн мянган жил тогтмол280 ppm орчим байснаа аж үйлдвэр хөгжиж эхэлснээс хойш ихэссээр 2014 онд 400ppm-ийн шугамыг огтолсон байна. Энэхүү ихсэлт хүний үйл ажиллагаатай холбоотойтул түүнийг зохицуулж болох учиртай. Бид энэ өгүүлэлдээ шаталтын механизм ба ойнхаягдал биомассын ялзралаас болж ялгарах нүүрстөрөгчийн давхар ислийн хэмжээг 2дахин бууруулах бионүүрсний утаагүй зуухны хийц ба ажиллагааг танилцуулна.
Сорил Хэмжилтийн Дээжид Нейтрон Идэвхжилийн Аргаар Хийсэн Элементийн Шинжилгээний Дүн
Authors: Г Дамдинсүрэн , П Зузаан , Н Отгонпүрэв
Published: March 2023

Нейтрон идэвхжилийн шинжилгээний лабораториудын дунд явуулсан ур чадварыгшалгах сорил хэмжилтийн дээжүүдийг ЦСТ-ийн электроны цикл хурдасгуур МТ-22микротроны удаан нейтроны суваг дээр Na, Mn, K, Sb, As, Eu зэрэг элементүүдийгидэвхжилийн аргаар шинжлэн тодорхойлж, бусад орны лабораториудын дүнтэйхарьцуулан үзүүлэв.
Өндөр Энергийн Бөмбөгөн Тээрмээр Гарган Авсан ZnO Нанобөөмийн Судалгаа
Authors: Г Оюунгэрэл , Г Батдэмбэрэл
Published: March 2023

Өндөр энергийн бөмбөгөн тээрмийн (HEBM) аргаар 1.4 микрон хэмжээтэй цайрынисэл (ZnO)-ийг 1, 5, 8 цагийн хугацаатай тээрэмдэж, тээрэмдэх хугацааг ихэсгэхэдталстын хэмжээ 46.64нм-ээс 3.44 нм хэмжээтэй цайрын ислийн нунтгийг амжилттайгарган авсан. Цайрын ислийн нанохэмжээт бүтцийг рентген дифракцийн аргаарсудалсан. Рентген фазын анализын дүнд анхдагч дээж болох гексогональ тэгш хэмтэй(ZnO) цайрын исэлийн фазын хажуугаар цэвэр цайр (Zn), куб тэгш хэмтэй цайрынисэл (ZnO) гэсэн 2 фаз үүсч байв. Дээж тус бүрийн рентген фазын талстын хэмжээгШеррерийн тэгшитгэлийг ашиглан тодорхойлсон. Мөн Nanophox (PCCS) –ийгашиглан дээж тус бүрийн бөөмийн дундаж хэмжээ, бөөмүүдийн хэмжээсийнтархалтын муж, хувийн гадаргуугийн талбай зэрэг хэмжигдэхүүнүүдийн утгуудыгтодорхойлов.
Нүүрсний Үнсний Кристалл Бүтцийн Судалгаа
Authors: Г Батдэмбэрэл
Published: March 2023

Рентген флоуресенцийн аргаар дулаан цахилгаан станцын шатаасан нүүрснийдэгдэмтгий үнсэнд цахиур, хөнгөн цагаан, кальци, төмөр, калий, магнези, натрий,титан, манган, фосфорын ислүүд болон дагалдах зарим элементүүдийн тоо хэмжээгтус тус тодорхойлсон. Үнсэн дэх хүнд металлуудын нийт концентрацPb>Zn>Cu>Cr>Ni эрэмбэтэйгээр дараалж байсан. Рентген туяаны дифракцийн аргаарүнсний кристалл фазыг бүрдүүлэгч үндсэн эрдсүүдийг дараахь байдлаар тодорхойлов:кварц, альбит, анортит, гематит.
Устөрөгчийн Эрчим Хүчийг Монголд Хөгжүүлэх Асуудалд
Authors: Н Норов , С Одмаа , Т Жамьянсүрэн , Г Энхбаатар , М Энхбаатар , О Чимэдцэрэн
Published: March 2023

Манай улсад харьцангүй цэвэр байгалийн хийн нөөц илрээгүй, эрчим хүчний үндсэннөөц нь нүүрс, уран тул цөмийн эрчим хүчний өндөр температурын хийн реакторашиглан цахилгаан эрчим хүч болон нүүрснээс устөрөгч үйлдвэрлэж экологийнүнэмлэхүй цэвэр устөрөгчийн эрчим хүчийг ойрын ирээдүйд хөгжүүлэх асуудлыгэнэхүү ажлаар дэвшүүлэн тавив.
New Methods to Taking Fractional Derivatives and Its Applications
Authors: Kh Namsrai , M Purevkhuu , S Saran , B Munkhzaya
Published: March 2023

Recently, interest in fractional calculus has been encouraged by its applications in the different fields ofscience. The applications of fractional calculus include stochastic processes, anomalous diffusion andrheology. In this paper we present new formulas for taking fractional derivatives and some considerationsof its applications for the harmonic oscillator
Scattering cross sections in complex scaling method
Authors: Odsuren M. , Sarsembayeva A , Khuukhenkhuu G , Davaa S , Usukhbayar B , Katō K
Published: March 2023

We have investigated the scattering cross sections of the various potential systems. In thepresent study, not only the scattering cross sections but also the contributions of the resonance andcontinuum states were computed for partial states of two various systems.
Фуллеренээр чанаржсан зэс ба титаны цахилгаан, физик чанарын давтамжийн хамаарал
Authors: П Түвшинтөр , Д Улам-Оргих , Г Шилагарди
Published: March 2023

Нүүрстөрөгчийн нано-бөөмс агуулсан композиц материалын бат бэх чанар,температур ба химийн үйлчлэлд тэсвэртэй шинжийг ашиглан сенсор ба молекулярэлектроникт ашиглах хэт ирээдүй нээгдэж байна. Иймээс эдгээр композицматериалын физик шинж чанар хувьсах гүйдлийн давтамжаас хэрхэн хамаарахыгсудлах нь эн тэргүүний ач холбогдолтой.
Нягтын функционалын онолоор гелийн атомын өдөөгдсөн төлөвүүдийн энергийг тооцоолох нь
Authors: Д Наранчимэг , Л Хэнмэдэх , Г Мөнхсайхан , О Сүх , Н Цогбадрах
Published: March 2023

Нягтын функционалын онолын Кон-Шэмийн тэгшитгэлээр гелийн атомын нэг удааөдөөгдсөн синглет, триплет төлөвүүдийн нягт ба энергийг тооцоолсон. Кон-Шэмийнтэгшитгэлийг бөмбөлөг координатын системд Кулоны долгион функцтэй дискретхувьсагчийн аргаар бодсон. Энд координатыг жигд биш, оптималаар дискретчилж,нарийвчлал сайтай шийдийг гаргаж авч тооцоолсон. Тооцооны үр дүнгүүдийг Ройнарын псевдоспектриал аргаар тооцоолсон ба туршлагын үр дүнтэй харьцуулахадгелийн нэг удаа өдөөгдсөн синглет төлөвийн энергийн зөрүү нь 2.23%, гелийн нэг удаа өдөөгдсөн триплет төлөвийн энергийн зөрүү нь 2.20 % байна.
BNC урвалаар үүсэх цэнэгт бөөмсийн био-эффект
Authors: Ж Эрдэнэтогтох , Б Дүүрэнбуян , А Ито , П Тайвансайхан
Published: March 2023

20-р зууны томоохон нээлтүүдийн нэг нь дулааны нейтрон болон 10B изотопынхарилцан үйлчлэлийн дүнд үүсэх хүнд цэнэгт бөөмсөөр (альфа бөөм (4He) ба 7Li-ийнионоор) хорт хавдрыг шарж эмчилдэг BNCT (Boron Neutron Capture Therapy) арга юм.Сүүлийн жилүүдэд BNCT-г хөгжүүлэх чиглэлд эрдэмтэд ихэд анхаарч BNCT-ийнмеханизмыг нарийвчлан судлах болов. Эрдэмтдийн өмнө хөндөгдөж буй нэг голбодлого бол эмчилгээний шарлагаар үүсэх ДНХ-н дан утасны эвдрэл (Single StrandBreak, SSB) болон давхар утасны эвдрэл (Double Strand Break, DSB)-ийн хэмжээгүнэлж, шарлагад оролцогч бөөмс (альфа бөөм, 7Li-ийн ион болон нейтрон) тус бүрийннөлөөг илрүүлэх юм. Бид Яаёой судалгааны реакторыг ашиглаж нейтрон болон BNCурвалаар үүсэх цэнэгт бөөмсийн био-эффектийг ДНХ-н утасны эвдрэлийг үнэлэхаргаар судаллаа. Мөн хүний биеийн загвар фантом дахь түгэлтийг шинжлэв.Фантомын гадаргаас ойролцоогоор 30 мм гүнд BNC урвал хамгийн хүчтэй явагдажбайв. Мөн нейтроны шарлагаар үүсэх ДНХ-ийн эвдрэлд хурдан нейтрон гол хувьнэмэр оруулж буйг тогтоов. Үүний дараа BNC урвалаар үүсэх альфа бөөмийншарлагын дүнд үүсэх ДНХ-ийн молекулын эвдрэлийг GEANT4-PDB4DNAпрограмаар тооцож BNCТ-ийн туршилтын үр дүнтэй харьцуулав. Үр дүн BNCТ-ийнүед альфа бөөм гол үүрэг гүйцэтгэдэг болохыг харуулав.
Альфа-протон системийн фазын шилжилтийг комплекс хувиргалтын арга ашиглан тодорхойлсон нь
Authors: А Золбаяр , Г Хүүхэнхүү , С Даваа , А Сарсембаева , Н Амангелди , М Одсүрэн
Published: March 2023

5Li цөмийг...
Богино цахилгаан пульсээр атомын долгион функцэд үүсэх хуйлрал
Authors: Зоригт  , Чулуунбаатар Алдармаа , Лочин Хэнмэдэх
Published: March 2023

Энэ ажилд цахилгаан орны үйлчлэлээр 1S төлөвт  орших устөрөгчийн атомын долгион функцийн хугацааны хувьсалыг судаллаа.  Лазерын цахилгаан орны богино пульсээр атомыг өдөөх үед долгион функцийн  хувьсалд ажиглагдах нэг онцгой үзэгдэл нь хуйлрал юм. Хуйлрал хэрхэн үүсч  байгааг  хугацаанаас  хамааруулан дүрслэн харууллаа. Долгион функцийн фазын утгаас тоон аргаар градиент авч электроны хурдыг, хугацаагаар тухайн уламжлал авч локал энергийн гадаргыг дүрслэв.
Цөмийн эрчим хүч ашиглах тухай
Authors: Н Норов , Н Содном , С Даваа , Л Энхжин
Published: March 2023

Дэлхий нийтийн эрчим хүчний хөгжлийн байдлаас үзэхэд өндөр хөгжилтэй болон хөгжиж буй орнууд цаашдаа экологийн зохицлыг харгалзан байгалийн хий, цөмийн эрчим хүчид тулгуурлах хандлагатай байна.
Капитал зэвсэглэмжийн динамик
Authors: Х Цоохүү , Ц Баярхүү
Published: March 2023

Эдийн засгийн өсөлтийн загварын хүрээнд капитал зэвсэглэмжийн динамикийг илэрхийлэх дифференциал тэгшитгэл бичиж шийдийг нь олсон.
Мөрөн хотын районд их бороо прогнозлох асуудалд
Authors: Д Чогсом
Published: March 2023

УААА-н салбаруудынбүтэц өөрчлөгдөж, аж ахуйн байгууллагууд эдийн засгийн бие даасан үйл ажллагаа явуулахын хирээр ус цаг уурын төрөл бүрийн ялангуяа цаг агаарын аюултай үзэгдэл, элементүүдийг орон зай цаг хугацаагаар нарийвчилсан прогнозын эрэлт хэрэгцээ улам өссөөр байна.
Холбоо ба цахилгаан дамжуулах шугам сүлжээний байгууламжинд цаг уурын хүчин зүйлсийн үзүүлэх нөлөөг тооцох үндэслэл
Authors: Б Жамбаажамц , Г Сарантуяа
Published: March 2023

Аливаа улс орны эдийн засгийн хөгжил тухайн нутгийнхаа цаг уурын нөхцөлтэй үууд шүтэлцэээтэй байдаг. ....
Улаанбаатар хотын газрын гадарга орчмын температурын инверсийн судалгаа
Authors: С Эрдэнэсүх
Published: March 2023

Агаарын температур шим мандалд (тропосфер) босоо чиглэлд 100 метр тутамд дунджаар 0.65 градус цельс-ээр буурдаг зүй тогтолтой боловч тухайн цаг агаарын нөхцөл, орон нутгийн газарзүйн онцлог хүчин зүйлүүдээс хамаарч дээрхи зүй тогтол алдагдана. ...
Solar Radiation Weakening in the Earth's Atmosphere
Authors: T Ulaanbaatar , Ts Baatartsuluun
Published: March 2023

Энэ өгүүлэлд Дэлхийн агаар мандал дах нарын шулуун цацрагийн сулралыг тооцох онолын шинэ аргачлалыг боловсруулсан.
MÉTODOS DE ANÁLISE MULTICRITÉRIO PARA AUXÍLIO À TOMADA DE DECISÃO NA IMPLANTAÇÃO DO MES - MANUFACTURING EXECUTION SYSTEM
Authors: Decó Jáder Gustavo , Chiwiacowsky Leonardo Dagnino
Published: March 2023

O trabalho tem o objetivo de desenvolver um modelo de decisão baseado em múltiplos critérios para avaliar as possibilidades de equipamentos para implantação de um MES (Manufacturing Execution System) em uma empresa do setor moveleiro. Para avaliação do modelo de decisão desenvolvido, foram aplicados dois diferentes métodos de análise multicritério para comparação dos resultados. Os métodos adotados foram o AHP (Analytic Hierarchy Process) e o TOPSIS (Technique of order Preference Similarity to Ideal Solution). Para o desenvolvimento do modelo de decisão e avaliação das alternativas, foi envolvida uma equipe específica da empresa para que os dados e informações garantissem a qualidade e assertividade dos resultados gerados. A equipe estabeleceu quatro alternativas de equipamentos e quatro critérios para compor o modelo de decisão que foi aprovado pela gestão. A avaliação do modelo de decisão com os dois métodos de análise multicritério forneceu ordenações semelhantes das alternativas, diferindo-se apenas pela inversão da posição entre a primeira e segunda alternativas identificadas de acordo com o método empregado na análise, porém com pontuações próximas.
Effects of Cholinergic Receptor Activation and Magnetic Fields on Motor Behavior in Ischemic Gerbils
Authors: Pitta Manoela , Zhang Kelly , Santo Lucas , Rosa Gustavo de Mello , Guirro Elaine , Araujo João De
Published: March 2023

Aim of the study: Given the known synergistic relationship between
magnetic field (MF) and cholinergic receptor activation in the
cholinergic system, the present study aims to investigate whether the
combined use of a static MF and an agonist for nicotinic acetylcholine
receptors (nAChR) can preserve motor behavior in ischemic gerbils.
Materials & methods: We randomly allocated 72 Mongolian gerbils into
nine groups (n=8), distributed according to surgical procedure and
treatment. The animals were trained and evaluated on the Rotarod (RR) to
assess motor performance. Results: Our main finding was the preservation
of motor behavior in the Sham Ischemia + Nicotine + Sham Magnetic
Stimulation (Sh+N+SMS) and Ischemia + Nicotine + South Pole (I+N+SP)
groups, as evidenced by the results of the RR test. Conclusions: Our
findings are consistent with previous literature and provide insight
into the mechanism of potentiation, as results showed that adding a
nAChR agonist to the MF preserved motor performance in the RR test of
ischemic animals.
Amelioration of saline-alkali land by cultivating Melia azedarach and characterization of underlying mechanisms via metabolome analysis
Authors: Long Xiaohua , Li Na , Shao Tianyun , Shao Tianyun , Li Bin , Wang Xinglan , Tao Chenyunzhu , Shao Tianyun , Gao Xiumei , Rengel Zed
Published: March 2023

Soil salinization is a serious problem leading to ecological
degradation. Melia azedarach is highly salt-tolerant, and its
application to saline-alkali land is a promising strategy for restoring
degraded lands. In this study, we analyzed the soil properties and
metabolome of M. azedarach roots grown in low- (< 3
g/kg; L), medium- (5~8 g/kg; M), and high-
(> 10 g/kg; H) salinity soils to explore the amelioration
effect and adaptation mechanism of M. azedarach to soils with
differential salinity. Cultivation of M. azedarach was associated
with a decrease in the concentration of Na and
increases in organic matter content and alkaline phosphatase and urease
activities in the rhizosphere soil. The metabolome analysis revealed
that a total of 382 (ESI+) and 277 (ESI-) differential metabolites
(DEMs) were detected. The number of DEMs in roots rose with increased
soil salinity, such as sugars and flavonoids in H vs. L, and amino acids
in M vs. L. The most up-regulated DEMs were 13-S-hydroxyoctadecadienoic
acid, 2’-Deoxyuridine and 20-hydroxyleukotriene B4. Combined analysis of
soil properties and M. azedarach DEMs indicated that alkaline
phosphatase activity was positively correlated with traumatic acid
concentration. Taken together, these results indicate that M.
azedarach has the potential to reduce soil salinity and enhance soil
enzyme activity, and it can adapt to salt stress by regulating
metabolites like sugars, amino acids, and flavonoids . This study
provided a basis for understanding the mechanism underlying the
adaptation of M. azedarach to saline-alkali soil and its
amelioration.
Serotonin Syndrome - A Focused Review
Authors: Mikkelsen Nicolaj , Damkier Per , Pedersen Sidsel Arnspang
Published: March 2023

Background: Serotonin syndrome is a potentially life-threatening
syndrome with manifestations spanning from mild adverse effects to
life-threatening toxicity. The syndrome is caused by overstimulation of
serotonin receptors by serotonergic drugs. Since the use of serotonergic
drugs is increasing, primarily due to the widespread use of selective
serotonin reuptake inhibitors, cases of serotonin syndrome have likely
seen a parallel increase. The true incidence of serotonin syndrome
remains unknown due to its diffuse clinical presentation. Objectives:
This review aims to provide a clinically focused overview of serotonin
syndrome, covering its pathophysiology, epidemiology, clinical
manifestations, diagnostic criteria, differential diagnosis, and
treatment as well as classifying serotonergic drugs and their mechanism
of action. The pharmacological context is emphasized, as it is crucial
for detection and management of serotonin syndrome. Methods: Focused
review based on a literature search using the PubMed database. Findings
and conclusion: Serotonin syndrome can occur through therapeutic use or
overdose of a single serotonergic drug, or as a drug interaction between
two or more serotonergic drugs. Central clinical features consist of
neuromuscular excitation, autonomic dysfunction and altered mental
status, occurring in a patient undergoing new or altered serotonergic
therapy. Early clinically recognition and treatment are crucial to
prevent significant morbidity.
Bacterial infection may trigger DRESS syndrome: an exceptional case of delayed hypersensitivity reaction occurring 22 months after allopurinol therapy
Authors: Souilem Ines , fatma zgolli , Lakhoua Ghozlane , Kastalli Sarrah , Daghfous Riadh , Aidli Sihem El
Published: March 2023

Drug-induced hypersensitivity syndrome also known as DRESS syndrome is
considered as a severe and potentially life-threatening adverse drug
reaction. The pathogenesis of DRESS syndrome is still partially
understood. Prior research has implicated viral infection or
reactivation, specifically, human herpes viruses 6 and 7, Epstein-Barr
virus and cytomegalovirus.

We report a case of DRESS syndrome induced by allopurinol occurring 22
months after starting the treatment and which might have been triggered
by concomitant infections.

A 72-year-old man was put on allopurinol in February 2021.  Twenty
months later, he was hospitalized for Klebsiella urinary tract infection
associated with erysipelas that had evolved well after two weeks of
antibiotherapy. On November 20, he presented a second episode of
Enterococcus faecalis urinary tract infection. On December 5, he
developed a pruritic maculopapular rash with fever (39.5°C). Skin
examination showed a generalized infiltrated erythematous maculopapular
eruption and facial edema. Complete blood counts showed total leucocyte
count at 10.6 × 10/µl with eosinophils at 1.58 ×
10/µl (14.9%). Histological findings were compatible
with DRESS syndrome. Allopurinol was stopped. Skin condition improved
within a month.

A prolonged delay between the start of treatment and the appearance of a
febrile rash should never exclude the diagnosis of Dress syndrome or
delay its management.
Effect of Extra Hydrophobic Resin Layer on Bonding of Universal Adhesive Systems to Enamel
Authors: Soares JPB , Perdigão J , Chrispim B , Lopes GC
Published: March 2023

Objective

The objective of this study was to compare the effect of solvent in universal adhesives (UA) and the application of an extra layer of hydrophobic bonding resin on enamel shear bond strengths (SBS).

Methods and Materials

Crowns of 224 bovine mandibular incisors were embedded in acrylic resin, wet-polished up to 600-grit silicon carbide paper and assigned to 3 UAs with different solvents (n=32): ethanol-based UA (ADU, AdheSE Universal, Ivoclar Vivadent); isopropanol-based UA (PBU, Prime&Bond Universal, Dentsply Sirona); and acetone-based UA (OPT, OptiBond Universal, Kerr Co). The same UAs were also applied with an extra layer of a hydrophobic bonding resin (HLB, Heliobond, Ivoclar Vivadent): ADU + HLB; PBU + HLB; and OPT + HLB. HLB alone was used as control. Enamel was etched with 37.5% H3PO4 (Kerr Gel Etchant, Kerr Co) for 15 seconds, rinsed with water, and air dried. UAs were applied according to the respective manufacturer’s instructions. After adhesive application, composite cylinders (Filtek Z250, 3M Oral Care) were built up and light-cured (40 seconds/increment, 40 J/cm2) keeping the light tip in contact with the mold. Specimens were stored in water for 24 hours (24H) or for 6 months (6M). A knife-edged metallic rod (Ø=2.8-mm semicircular notch) loaded the composite cylinders until fracture. Mode of failure was analyzed with optical microscopy (40×). Statistics included twoway analysis of variance (ANOVA; adhesive strategy and water storage) and Tukey honestly significant difference (HSD) post hoc test (α=95%).

Results

Mean enamel SBS ranged from 3.6 (±2.2) MPa (HLB/6M) to 24.7 (±7.1) MPa (ADU + HLB/6M). ANOVA revealed significant differences for adhesive strategy (p≤0.001) but no significant differences for water storage (p>0.05). All UAs resulted in similar mean enamel SBS with or without an extra layer of HLB at 24H. After 6M, only ADU resulted in higher enamel SBS when an extra layer of HLB was applied. All UAs resulted in higher mean enamel SBS than HLB (control). Most failures were adhesive exception for PBU/HLB/6M, which had mostly mixed failures.

Conclusions

UAs resulted in statistically higher enamel SBS than the nonsolvated hydrophobic bonding resin (control), regardless of the solvent in their composition. Application of an extra layer of hydrophobic bonding resin over UAs did not improve mean enamel SBS for isopropanol- and acetone-based UAs but did improve mean enamel SBS for the ethanol-based UA after 6M. Resin composite bonding to enamel using a hydrophobic bonding resin alone is not recommended.
The Impact of the Tax Rate and Average Wage Level on FDI: The Case of Albania
Authors: Velaj Entela , Nexhipi Olta
Published: March 2023

The purpose of this work is to study the factors that have an impact on foreign direct investments in Albania. The data taken into consideration belong to the period 2005-2019. The data are quantitative and secondary. Their source is the World Bank, the Ministry of Finance and Economy and INSTAT. Albania is a developing country and for this reason foreign direct investments are of great importance for its economy. The increase in investments creates new jobs, the increase in individual income, the increase in consumption and thus the economic growth of a country. The data were tested with the SPSS statistical program. The EURO/ALL exchange rate, merchandise trade, the annual increase in the country's average wage and the total rate of taxes and contributions paid by a company were taken as independent variables. The total tax rate and the exchange rate negatively affect the growth of foreign direct investments. This impact is significant. Merchandise trade has a positive effect on the growth of investments and also this impact is significant. The average wage level of the country has a negative effect on foreign direct investments, but this effect is not significant.
The Analysis of In-Service Teachers’ Practices of Implementing Technological Pedagogical Content Knowledge (TPACK)
Authors: Soko Imelda P. , Samo Damianus D.
Published: March 2023

Generally this study aims to analyze quantitatively and qualitatively the level of TPACK for teacher students and various factors that influence teachers’ TPACK.  This study utilized quantitative approach with the help of survey method.  The results showed that the teachers’ TPACK level was at a poor (1.7%), good (59.3%), and very good level (39.9%). There are four TPACK components that are at the perception level and three components are at the conception level. Correspondingly, three significant differences found in the average of: (a) Teachers’ TPACK between each study groups, (b) Teachers’ TPACK between each group of teachers with different teaching experiences, and (c) Teachers’ TPACK between each group of teachers with different training experiences. In short, both teaching and training experience are able to distinguish teachers’ TPACK and have a positive influence on teachers’ TPACK.  Further research is needed by considering the importance of learning experience and the educational stakeholders should ensure that teacher professional developments are applicative TPACK programs.
Water Masses at the Surface of the Indian Ocean
Authors: Carvalho Junior Oldemar de Oliveira
Published: March 2023

Water masses in the surface layer of the ocean are harder to define in terms of hydrographic properties because they undergo large seasonal and interannual variations. Therefore, single TS-combinations cannot be used to define surface water masses. The solution to the definition of surface water masses is the temperature/salinity time diagram (TS-time diagram) and/or the temperature/chlorophyll time diagram (TC-time diagram). This work establishes a systematic definition of regional water masses in the surface layer of the tropical Indian Ocean based on TC-time and TS-time diagrams of mean and standard deviation for 5° squares. This classification is based on an analysis of the ratios between semi-annual and annual amplitudes of temperature and a multiple regression analysis between temperature, salinity, and chlorophyll, with Ekman pumping, components of pseudo-stress wind, wind magnitude and net-down-freshwater-flux. Four water masses are identified for the surface of the Indian Ocean: The Arabian Sea Surface Water (ASSW), the Bay of Bengal Surface Water (BBSW), the Equatorial Indian Surface Water (EISW) and the Southern Indian Surface Water (SISW). The geographical representation of the water masses agrees well with the theoretical frame of reference.
Morphosyntactic Features of Membuat ‘Make’ in the Light Verb Constructions of Indonesian
Authors: Nugraha Danang Satria
Published: March 2023

Light verb constructions (LVCs) are verbs that have an idiomatic-like sense that can be interpreted from their noun-part of construction. Based on the morphosyntactic presentation, the LVCs have been construed by using verbs and nouns. This study aimed to identify and describe the morphosyntactic features of LVCs in Indonesian, namely the membuat ‘make’ marker construction. The data had been retrieved from three reputable corpora, i.e., LCCI (Liepzig Corpora Collection-Indonesian), SEAlang (SEAlang Library Indonesian Text Corpus), and KBBI (Kamus Besar Bahasa Indonesia). The analysis has been done using immediate constituent analysis (ICA). The results provided the following three folds. First, the verb membuat ‘make’ in Indonesian LVCs tends to construct the ACTIVE type of LVCs. Second, the verb membuat ‘make’ in Indonesian LVCs tends to produce the TRANSITIVE type of LVCs. Third, the verb membuat ‘make’ in Indonesian LVCs tends to characterize LVCs as the non-valency-changing verb.
VARIANTS OF THE STRUCTURE, INNERVATION, AND BLOOD SUPPLY OF THE EXTENSOR CARPI RADIALIS LONGUS AND BREVIS IN THE HUMAN FETUS
Authors: Koval Oleksandr , Khmara Tatiana , Slobodian Oleksandr
Published: March 2023

In modern orthopedic practice, some diseases do not cause pronounced functional disorders in the anatomical segments of the limbs but are accompanied by persistent pain syndrome. Among such diseases is lateral epicondylitis, or «tennis elbow». The superﬁ cial extensor muscles of the posterior group of the forearm begin in the region of the lateral epicondyle of the humerus, in particular the extensor carpi radialis longus and brevis. The deepening of knowledge about the typical and variant structure, topography, blood supply, and innervation of the extensor carpi radialis longus and brevis in human fetuses will allow for improving the approach to carrying out existing fetal surgical techniques, as well as to creating foundation for the development of modern surgical approaches.The study aimed to determine the anatomical variability of the extensor carpi radialis longus and brevis in human fetuses.The study was conducted on preparations of the upper limbs of 36 human fetuses aged 4-10 months using macromicroscopic preparation, vascular injection, and morphometry. The topographical and anatomical features of the extensor carpi radialis longus and brevis in human fetuses are elucidated: variability and bilateral asymmetry of the external shape and size, variability of the places of origin and attachment, variants of blood supply and innervation, patterns of intramuscular distribution arteries and nerves in these muscles. It was found that the zone of the greatest concentration of intramuscular nerves and arteries is the upper and middle third of the bellies of the extensor carpi radialis longus and brevis.Despite the good blood supply of the extensor carpi radial muscles, the relatively small size of their muscle bellies and the transverse course of the intramuscular nerves result in limited opportunities for cutting out muscle ﬂ aps from them. To cut the ﬂ aps on the leg from these muscles, the most rational cuts are in the ascending (transverse) direction, coinciding with the course of the main intramuscular nerves and arteries. Thus, it is possible to use the extensor carpi radialis longus and brevis only for plastic ﬁ lling of the remaining bone cavities of the upper third of the posterior- lateral surface of the radius.The movement of the extensor carpi radialis longus and brevis is also complicated by the fact that their tendons cross the abductor pollicis longus muscle, extensor carpi radialis longus and brevis, and create serious obstacles for the mobilization of these tendons.Knowledge of the classic and variant anatomy of the arteries of the upper limb, and in particular the described topographic and anatomical features of the right brachial radial artery in a 6-month-old fetus, will allow choosing the correct treatment tactics and avoiding iatrogenic injuries during manipulations, diagnostic and surgical interventions.
ENTERIC INSUFFICIENCY SYNDROME IN SURGICAL PATIENTS: OBJECTIVE REALITY OR A SYMPTOM OF THE DISEASE?
Authors: Boiko Valerii , Polоvyi Viktor , Saliutin Ruslan , Plegutsa Oleksandr , Solovei Yurii , Romanovskyi Mykola
Published: March 2023

Acute surgical diseases and trauma in some cases are accompanied by the development of enteric insu ﬃ ciency syndrome, which aggravates the course of the underlying disease and increases mortality.The purpose of this scientiﬁ c review is to focus the attention of clinicians on the emergence of enteric insu ﬃ ciency syndrome in the course of acute surgical pathology and traumatic disease, which requires the use of individualized treatment measures.Results. In acute surgical pathology and traumatic disease, a complex structural and functional reorganization of the intestinal epithelium occurs, which disrupts the interrelationships between the cells of the intestinal epithelium, the rejection of epithelial cells and, as a result, the penetration of bacteria from the lumen of the intestine into the lamina propria, their accumulation in the stroma of microvilli and translocation into the free peritoneal cavity. Morphologically it manifests itself in the form of erosion and ulcerative defect or phlegmonous enteritis. As a result, an endotoxemia syndrome is formed, which is the cause of the development of multiple organ failure in such patients Conclusion. The syndrome of enteric insu ﬃ ciency in acute surgical pathology of the organs of the peritoneal cavity and injuries is a clinically, laboratory and morphologically proven condition that has periods of progress and corresponding clinical symptoms.
MELATONIN AND MISCARRIAGE
Authors: Pushkashu Anastasia , Yuzko Oleksandr
Published: March 2023

Spontaneous abortions (abortion up to 22 weeks of gestation since the last menstrual cycle or with a fetal weight of less than 500.0 g) occur in 15-20% of the total number of registered pregnancies. The incidence of miscarriages increases up to 15% in women under 25 and to 35% and more in women over 38. Causes of miscarriages can be divided into two categories: those which associated with chromosomal abnormalities and those which associated with disruption of the intrauterine environment.Some studies have shown the inﬂ uence of systematic and placental oxidative stress in the pathophysiology of abortion and repeated «stop» of pregnancy. Lack of antioxidant protection leads to recurrent abortions. Membranes’ damages with the production of lipid peroxides, which are induced by reactive oxygen species (ROS), as well as due to certain disorders or disorganization, immediately cause abortion. There are versions that pineal insuﬃ ciency may be associated with spontaneous abortions, even in cases where there are no chromosomal abnormalities and structural disorders of the uterus. This hypothesis is based on the fact that melatonin is a strong antioxidant which binds free radicals and its concentration normally increases signiﬁ cantly during pregnancy and in pinealectomy rats the frequency of miscarriages increases. Melatonin has an immunomodulatory eﬀ ect. It stimulates the secretion of progesterone, which reduces the degree of uterine contraction and prevents immunological rejection of the trophoblast, inhibits the synthesis of prostaglandins, which can potentially induce uterine contractions. Pinealectomy leads to a signiﬁ cant reduction of circulating in blood melatonin level and to abortion in rats.
Functional state of kidneys in patients with acute myocardial infarction
Authors: Broniuk A.V.
Published: March 2023

The aim. To assess the functional state of the kidneys in patients with acute myocardial infarction and to determine the effect of reduced glomerular filtration rate on the course of the disease.Material and methods. A retrospective analysis of 410 medical records of patients who were treated for STEMI in the department for patients with myocardial infarction of the Vinnytsia Regional Clinical Medical and Diagnostic Center for Cardiovascular Pathology in 2019 was conducted. All patients were hospitalized within 12 hours of the onset of pain, all patients underwent urgent revascularization of the infarct-related artery. The average age of the examined was 64.8±0.4 years. There were 263 men (64.1%), average age 60.8±0.2 years and 147 women (35.9%), average age 68.8±0.5 years. Results. It was found that the average level of creatinine was 101.5±2.2 μmol/l, no significant difference between men and women was found. The level of GFR was 64.8±1.1 ml/min/1.73m2 and was significantly lower among women than men (p<0.001). GFR ≥90 ml/min/1.73m2 was diagnosed in 31 patients (7.5%), no significant difference between men and women was established. GFR 60-89 ml/min/1.73m2 was found in 206 people (50.2%), significantly more often among men than among women (p<0.001). GFR of 30-59 ml/min/1.73m2 was established in 160 patients (39.1%), significantly more often among women than men (p<0.001). 11 people (2.7%) had GFR within 15-29 ml/min/1.73m2, no difference was noted between men and women. Significantly more patients with Killip III were in the II group (p<0.001), and with Killip IV (p<0.001). Among the medical records of the deceased that we analyzed were 28 patients (6.8%). A significantly larger number of patients who died were among patients with GFR less than 60 ml/min/1.73m2, namely 24 people (13.8%), p<0.001.Conclusions. It was established that in STEMI patients who underwent urgent revascularization, the average level of GFR was 64.8±1.1 ml/min/1.73m2. 173 people (42.2%) had a decrease in GFR of less than 60 ml/min/1.73m2. A decrease in GFR was significantly more often diagnosed in women than in men (p≤0.001), women were significantly older than men (p≤0.001). In the group of patients with GFR less than 60 ml/min/1.73m2, there were significantly more patients with hypertension for more than 10 years (p≤0.001) and diabetes for more than 10 years (p=0.067), there were significantly more people with peripheral artery disease (p=0.017). In the group of patients with STEMI and GFR less than 60 ml/min/1.73m2, significantly more HF of high gradations (Killip III-IV) were detected - in 36 people (20.7%). In-hospital mortality was significantly higher in patients with reduced GFR, 2% and 13.8%, respectively, p<0.001.
Possibilities of multislice computed tomography in assessing the structural and compositional features of calcium-containing urinary stones
Authors: Kolupayev S. , Lesovoy V. , Andonieva N. , Bielievtsova I. , Lisova M.
Published: March 2023

The aim: to study the X-ray density index (HU) in calcium-containing urinary stones with different structural and compositional features. The structural and compositional features of 118 samples of calcium-containing urinary stones, which were obtained as a result of extracorporeal shock wave lithotripsy, percutaneous nephrolithotripsy and ureteroscopic lithotripsy in patients with kidney and ureteral stones were studied. The structural features of the stones were evaluated by conducting a crystal-optical analysis, during which the linear dimensions, shape, color and degree of transparency of crystalline elements were estimated, and the volume fractions of the amorphous and crystalline phases in the sample structure were calculated. The compositional features of kidney stones were studied on the basis of a qualitative and quantitative assessment of their mineral composition by infrared spectroscopy. X-ray density of calcium-containing kidney stones was assessed based on the data of computed tomography without contrast, which was performed in all patients in the preoperative period. Structural and compositional features of calcium-containing urinary stones are characterized by the presence in their composition of calcium oxalate compounds in the form of vewellite and weddelite, as well as calcium phosphate in the form of apatite, hydroxylapatite, fluorapatite, carbonate apatite, which, depending on the stage of crystallization, can be in amorphous, amorphous-crystalline or crystalline state. The X-ray density of this type of urinary stones, according to multislice computed tomography, corresponds to the range of 1090-1785 HU. There is a direct correlation between the level of X-ray density of the stone and the volume fraction of the crystalline phase in its structure.
Ace inhibitors in the treatment of arterial hypertension (literature review)
Authors: Biletskyi S.V. , Petrynych O.A. , Kazantseva T.V.
Published: March 2023

Literature data on the role of the renin-angiotensin-aldosterone system in the pathogenesis of arterial hypertension and the role of angiotensin-converting enzyme inhibitors in the treatment of hypertension have been given.The renin-angiotensin-aldosterone system is the central element in controlling the body's water-salt balance and blood pressure. The main effector link of the renin-angiotensin system is angiotensin II, which causes vasospasm, activates heart contraction, inhibits the production of bradykinin, promotes proliferation, and fibrosis of blood vessels and myocardium, and promotes the synthesis of aldosterone in the glomerular zone of the adrenal cortex.Angiotensin-converting enzyme inhibitors are the mainstay of the treatment of arterial hypertension. They contribute to the correction of hypertension, hypertrophy, remodeling of the left ventricle, endothelial dysfunction, proliferation of arterial smooth muscles, and thrombotic phenomena. The 2018 ESH/ESC guidelines state that the first-line therapy in most patients with hypertension should be a fixed combination of a renin-angiotensin system blocker and a calcium channel blocker or diuretic. Blockade of the renin-angiotensin-aldosterone system is currently considered a gold standard of antihypertensive therapy.The objective is to systematize modern literature data on the role of ACE inhibitors in the treatment of arterial hypertension. Conclusion. To date, the concept of the role of the renin-angiotensin-aldosterone system (RAАS) in the pathogenesis of arterial hypertension and the role of ACE inhibitors in the treatment of hypertension has been formulated.
Kidney injury in patients who have contracted coronavirus disease: status of the problem today
Authors: Horban B.V.
Published: March 2023

As of January 2021, 87.6 million cases of COVID-19 have been registered in the world, of which 1.9 million cases have resulted in death. In Ukraine, at the end of 2020, the number of cases of the disease was 1,099,493, of which 19,505 resulted in death. The progressive course of COVID-19 can induce severe damage to the lungs, kidneys, heart and other organs and systems with the formation of acute respiratory distress syndrome and multiple organ failure syndrome. Kidney damage in the case of COVID-19 is still considered to be mainly secondary and associated with hypoxia, ischemia, disseminated intravascular coagulation in the case of severe and extremely severe disease. However, it is worth noting that kidney damage also occurs against the background of the massive use of medications that are sufficiently nephrotoxic.The purpose of this work is to review scientific results, which contain information about the current state of the problem of kidney damage in patients who have contracted the coronavirus disease.Patients with chronic kidney disease have an increased risk of infection with COVID-19, its severe course and mortality. Endothelial dysfunction, microangiopathy, coagulation disorders, and imbalance of the renin-angiotensin-aldosterone system are key links to kidney damage in the case of such concomitant pathology. An increase in the level of serum creatinine and blood urea nitrogen, the appearance and increase in the level of hematuria and proteinuria - these changes require careful study.Conclusions. 1. To date, scientific data on the mechanisms of kidney damage in patients with COVID-19 have been expanded. This makes it possible to develop methods of timely drug exposure to prevent the progression of renal function decline. 2. The incidence of acute kidney injury and mortality in COVID-19 patients with CKD is significantly higher than without CKD. 3. After recovery from COVID-19, patients with CKD should have dispensary observation and treatment.