{"id":76046,"date":"2021-11-26T17:54:14","date_gmt":"2021-11-26T14:54:14","guid":{"rendered":"https:\/\/azbuki.bg\/?p=76046"},"modified":"2025-09-10T10:28:24","modified_gmt":"2025-09-10T07:28:24","slug":"sp-obuchenie-po-prirodni-nauki-i-varhovi-tehnologii-knizhka-6-2021-godina-xxx","status":"publish","type":"post","link":"https:\/\/vocedu.azbuki.bg\/en\/chemistry\/sadarzhanie-na-sp-obuchenie-po-prirodni-nauki-i-varhovi-tehnologii-2021\/sp-obuchenie-po-prirodni-nauki-i-varhovi-tehnologii-knizhka-6-2021-godina-xxx\/","title":{"rendered":"Natural Science and Advanced Technology Education, 6\/2021, vol. 30"},"content":{"rendered":"

EXPERIMENTS<\/strong><\/span><\/h4>\n

Study of Compositions for Selective Water Isolation in Gas Wells<\/h3>\n

Al-Obaidi S.H. 1), Hofmann M.1), Smirnov V.I.1), <\/strong>
\nKhalaf F.H. 2), Alwan H.H. 2)<\/strong>
\n1)Mining Institute \u2013 Saint Petersburg (Russia)<\/em>
\n2)Department of Petroleum Engineering, Knowledge University \u2013 Erbil (Iraq)<\/em><\/p>\n

https:\/\/doi.org\/10.53656\/nat2021-6.04<\/span><\/a><\/p>\n

Abstract.<\/strong> A hydrophobic composition containing water repellents and highly volatile solvents is shown in this study to isolate water from the bottomhole formation zone of gas wells and reduce as much as possible the saturation of pore spaces with water…<\/p>\n

SEE MORE<\/a><\/p>\n

 <\/p>\n

\n

SCIENCE AND SOCIETY<\/span><\/strong><\/h4>\n

Mutations and Variants of SARS-CoV-2, the Coronavirus Causing COVID-19<\/h3>\n

Lachezar Karagyozov<\/strong>
\nSo\ufb01a University<\/em><\/p>\n

https:\/\/doi.org\/10.53656\/nat2021-6.05<\/span><\/a><\/p>\n

Abstract.<\/strong> In 2020, the SARS-CoV-2 coronavirus caused a pandemic with severe consequences for many countries...<\/p>\n

SEE MORE<\/a><\/p>\n

 <\/p>\n

\n

FROM THE RESEARCH LABORATORIES<\/strong><\/span><\/h4>\n

Semiempirical Quantum Chemical and Ab Intio Study of Co(Ii), Ni(Ii),Cu(Ii) and Zn(Ii) Complexes With The Azo Dye Derived From 4-Amino Antipyrine and 2,4-Dihydroxy Acetopheone<\/h3>\n

Satya Narayan Chaulia <\/strong>
\nRajendra (Auto) College (India)<\/em><\/p>\n

https:\/\/doi.org\/10.53656\/nat2021-6.03<\/span><\/a><\/p>\n

Abstract.<\/strong> Semi-empirical quantum chemical calculation was made to study the nucleophilicity of the ligand and to study the mode of bonding between the ligand and the metal ions.<\/p>\n

SEE MORE<\/a><\/p>\n

 <\/p>\n

 <\/p>\n

 <\/p>\n

 <\/p>\n

 <\/p>\n

On the Sound, Produced by a Coin, Rolling In A Balloon<\/h3>\n

Denitsa Vasileva<\/strong>
\nSofia High School of Mathematics \u201cPaisiy Hilendarski\u201d \u2013 Sofia (Bulgaria)<\/em><\/p>\n

https:\/\/doi.org\/10.53656\/nat2021-6.06<\/span><\/a><\/p>\n

Abstract.<\/strong> Balloons may be a thing children love playing with, but they also have different interesting physical properties such as the sound that is produced when something is put inside a balloon…<\/p>\n

SEE MORE<\/a><\/p>\n

 <\/p>\n

\n

CURRICULUM MATTERS<\/strong><\/span><\/h4>\n

Difficult Topics In the Chemistry Curriculum - Bulgarian Students' View<\/h3>\n

Kalin Chakarov, Alexandria Gendjova <\/strong>
\nSofia University<\/em><\/p>\n

https:\/\/doi.org\/10.53656\/nat2021-6.02<\/span><\/a><\/p>\n

Abstract.<\/strong> Chemistry is often considered a difficult subject, and the way students perceive learning affects their achievements...<\/p>\n

SEE MORE<\/a><\/p>\n

 <\/p>\n

\n

NEW APPROACHES<\/strong><\/span><\/h4>\n

Development of the Concept of Entropy: A Simpler Alternative to Carnot Cycle<\/h3>\n

Jamil Ahmad<\/strong>
\nUniversity of Botswana (Botswana)<\/em><\/p>\n

https:\/\/doi.org\/10.53656\/nat2021-6.01<\/span><\/a><\/p>\n

Abstract.<\/strong> The relationship between entropy and reversible heat and temperature is developed using a simple cycle, in which an ideal gas is subjected to isothermal expansion and compression and heated and cooled between states…<\/p>\n

SEE MORE<\/a><\/p>","protected":false},"excerpt":{"rendered":"

EXPERIMENTS Study of Compositions for Selective Water Isolation in Gas Wells Al-Obaidi S.H. 1), Hofmann M.1), Smirnov V.I.1), Khalaf F.H. 2), Alwan H.H. 2) 1)Mining Institute \u2013 Saint Petersburg (Russia) 2)Department of Petroleum Engineering, Knowledge University \u2013 Erbil (Iraq) https:\/\/doi.org\/10.53656\/nat2021-6.04 Abstract. A hydrophobic composition containing water repellents and highly volatile solvents is shown in this […]<\/p>","protected":false},"author":124332423427287,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jnews-multi-image_gallery":[],"jnews_single_post":{"subtitle":"","format":"standard","video":"","gallery":"","source_name":"","source_url":"","via_name":"","via_url":"","override_template":"0","override":[{"single_blog_custom":"","parallax":"0","fullscreen":"0","sidebar":"","second_sidebar":"","sticky_sidebar":"0","share_position":"","share_float_style":"","show_share_counter":"0","show_view_counter":"0","show_featured":"0","show_post_meta":"0","show_post_author":"0","show_post_author_image":"0","show_post_date":"0","post_date_format":"","post_date_format_custom":"","show_post_category":"0","show_post_reading_time":"0","post_reading_time_wpm":"","show_post_tag":"0","show_prev_next_post":"0","show_popup_post":"0","number_popup_post":"1","show_author_box":"0","show_post_related":"0","show_inline_post_related":"0"}],"override_image_size":"0","image_override":[{"single_post_thumbnail_size":"","single_post_gallery_size":""}],"trending_post":"0","trending_post_position":"","trending_post_label":""},"jnews_primary_category":{"id":""}},"categories":[4119],"tags":[],"yoast_head":"\n\u0421\u043f. \u201e\u041e\u0431\u0443\u0447\u0435\u043d\u0438\u0435 \u043f\u043e \u043f\u0440\u0438\u0440\u043e\u0434\u043d\u0438 \u043d\u0430\u0443\u043a\u0438 \u0438 \u0432\u044a\u0440\u0445\u043e\u0432\u0438 \u0442\u0435\u0445\u043d\u043e\u043b\u043e\u0433\u0438\u0438\u201c, \u043a\u043d\u0438\u0436\u043a\u0430 6\/2021, \u0433\u043e\u0434\u0438\u043d\u0430 XXX - \u0410\u0437-\u0431\u0443\u043a\u0438<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/newspaper.azbuki.bg\/chemistry\/sadarzhanie-na-sp-obuchenie-po-prirodni-nauki-i-varhovi-tehnologii-2021\/sp-obuchenie-po-prirodni-nauki-i-varhovi-tehnologii-knizhka-6-2021-godina-xxx\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u0421\u043f. \u201e\u041e\u0431\u0443\u0447\u0435\u043d\u0438\u0435 \u043f\u043e \u043f\u0440\u0438\u0440\u043e\u0434\u043d\u0438 \u043d\u0430\u0443\u043a\u0438 \u0438 \u0432\u044a\u0440\u0445\u043e\u0432\u0438 \u0442\u0435\u0445\u043d\u043e\u043b\u043e\u0433\u0438\u0438\u201c, \u043a\u043d\u0438\u0436\u043a\u0430 6\/2021, \u0433\u043e\u0434\u0438\u043d\u0430 XXX - \u0410\u0437-\u0431\u0443\u043a\u0438\" \/>\n<meta property=\"og:description\" content=\"EXPERIMENTS Study of Compositions for Selective Water Isolation in Gas Wells Al-Obaidi S.H. 1), Hofmann M.1), Smirnov V.I.1), Khalaf F.H. 2), Alwan H.H. 2) 1)Mining Institute \u2013 Saint Petersburg (Russia) 2)Department of Petroleum Engineering, Knowledge University \u2013 Erbil (Iraq) https:\/\/doi.org\/10.53656\/nat2021-6.04 Abstract. A hydrophobic composition containing water repellents and highly volatile solvents is shown in this […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/newspaper.azbuki.bg\/chemistry\/sadarzhanie-na-sp-obuchenie-po-prirodni-nauki-i-varhovi-tehnologii-2021\/sp-obuchenie-po-prirodni-nauki-i-varhovi-tehnologii-knizhka-6-2021-godina-xxx\/\" \/>\n<meta property=\"og:site_name\" content=\"\u0410\u0437-\u0431\u0443\u043a\u0438\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/Azbuki55\/\" \/>\n<meta property=\"article:published_time\" content=\"2021-11-26T14:54:14+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-09-10T07:28:24+00:00\" \/>\n<meta name=\"author\" content=\"\u201e\u0410\u0437-\u0431\u0443\u043a\u0438\u201c\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"\u201e\u0410\u0437-\u0431\u0443\u043a\u0438\u201c\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/newspaper.azbuki.bg\/chemistry\/sadarzhanie-na-sp-obuchenie-po-prirodni-nauki-i-varhovi-tehnologii-2021\/sp-obuchenie-po-prirodni-nauki-i-varhovi-tehnologii-knizhka-6-2021-godina-xxx\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/newspaper.azbuki.bg\/chemistry\/sadarzhanie-na-sp-obuchenie-po-prirodni-nauki-i-varhovi-tehnologii-2021\/sp-obuchenie-po-prirodni-nauki-i-varhovi-tehnologii-knizhka-6-2021-godina-xxx\/\"},\"author\":{\"name\":\"\u201e\u0410\u0437-\u0431\u0443\u043a\u0438\u201c\",\"@id\":\"https:\/\/vocedu.azbuki.bg\/en\/#\/schema\/person\/de220d282eaa494f914ce0fd838645dd\"},\"headline\":\"\u0421\u043f. \u201e\u041e\u0431\u0443\u0447\u0435\u043d\u0438\u0435 \u043f\u043e \u043f\u0440\u0438\u0440\u043e\u0434\u043d\u0438 \u043d\u0430\u0443\u043a\u0438 \u0438 \u0432\u044a\u0440\u0445\u043e\u0432\u0438 \u0442\u0435\u0445\u043d\u043e\u043b\u043e\u0433\u0438\u0438\u201c, \u043a\u043d\u0438\u0436\u043a\u0430 6\/2021, \u0433\u043e\u0434\u0438\u043d\u0430 XXX\",\"datePublished\":\"2021-11-26T14:54:14+00:00\",\"dateModified\":\"2025-09-10T07:28:24+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/newspaper.azbuki.bg\/chemistry\/sadarzhanie-na-sp-obuchenie-po-prirodni-nauki-i-varhovi-tehnologii-2021\/sp-obuchenie-po-prirodni-nauki-i-varhovi-tehnologii-knizhka-6-2021-godina-xxx\/\"},\"wordCount\":389,\"publisher\":{\"@id\":\"https:\/\/vocedu.azbuki.bg\/en\/#organization\"},\"articleSection\":[\"\u0421\u044a\u0434\u044a\u0440\u0436\u0430\u043d\u0438\u0435 \u043d\u0430 \u0441\u043f. \\\"\u041e\u0431\u0443\u0447\u0435\u043d\u0438\u0435 \u043f\u043e \u043f\u0440\u0438\u0440\u043e\u0434\u043d\u0438 \u043d\u0430\u0443\u043a\u0438 \u0438 \u0432\u044a\u0440\u0445\u043e\u0432\u0438 \u0442\u0435\u0445\u043d\u043e\u043b\u043e\u0433\u0438\u0438\\\", 2021\"],\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/newspaper.azbuki.bg\/chemistry\/sadarzhanie-na-sp-obuchenie-po-prirodni-nauki-i-varhovi-tehnologii-2021\/sp-obuchenie-po-prirodni-nauki-i-varhovi-tehnologii-knizhka-6-2021-godina-xxx\/\",\"url\":\"https:\/\/newspaper.azbuki.bg\/chemistry\/sadarzhanie-na-sp-obuchenie-po-prirodni-nauki-i-varhovi-tehnologii-2021\/sp-obuchenie-po-prirodni-nauki-i-varhovi-tehnologii-knizhka-6-2021-godina-xxx\/\",\"name\":\"\u0421\u043f. \u201e\u041e\u0431\u0443\u0447\u0435\u043d\u0438\u0435 \u043f\u043e \u043f\u0440\u0438\u0440\u043e\u0434\u043d\u0438 \u043d\u0430\u0443\u043a\u0438 \u0438 \u0432\u044a\u0440\u0445\u043e\u0432\u0438 \u0442\u0435\u0445\u043d\u043e\u043b\u043e\u0433\u0438\u0438\u201c, \u043a\u043d\u0438\u0436\u043a\u0430 6\/2021, \u0433\u043e\u0434\u0438\u043d\u0430 XXX - 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