Positive –A Study on a Nanoscale Revision Method and Sensitivity Evaluation This paper took a pyramid and a fixed point as the reference level. It was the intention of our team to establish and prove a new hardness value revising method that is to be used in the deflection of indentation of nano indentor. Such new method was named Material Surface Nanoscale Hardness Revision Method with which we re-measured various materials and error sensitivity of hardness values. We obtained the following conclusions:(1). This paper revision modification method have a highly precision. (2). When the round tip or plane tip was closed to ideal indentor tip, the contact areas during indentation process were close, not demonstrating significant difference. (3). The indentation triangle created when loading effort P was similar with the one left on the sample material when unloading the effort; thus, even though the sink-in and pile up effects due to the mechanical properties of sample material caused the differentiation of side lengths and two indentation areas, the angles of two indentation areas was the same. (4). When the effort was loaded by the tip onto the sample material, if the tip had a certain deflection ψ or rotation ω, the indentation triangle left on the sample material was still significant. (5). In the observation of the indentation triangle left on the sample material, when the triangle cannot become a regular triangle, it meant that there is a deflection or rotation happening to the tip and a further revision of the deflected angle ψ or rotated angle ω is required. (6). The hardness value revision method under indentation deflection situation had the best effect on the projected area revision; the second was on the indentation volume revision and than on the indentation contact area revision. (7). The hardness error sensitivity of hardness value revision method under indentation deflection situation had the best effect on the projected area; the second was on the contact area and than on the indentation volume revision. (8). The method proposed by this study was proved by the silica and aluminum single crystal indentation results and is thus able to be applied to the engineering in the nanoscale measurement of metal materials to obtain more precise data.不偏不倚-奈米級修準方法與敏感度評估之研究在這篇研究報告中，以一個三角錐和一個定點為基準，本團隊建立並證明一個新的在奈米硬度測試儀壓痕偏斜情況下，硬度值的修正方法，取名材料表面奈米硬度修正方法。在新的材料表面奈米硬度修正方法下，重新檢測各種材料及硬度誤差敏感度，得到許多好的結論：（1）本研究之修準方法具有高度精確性。（2）利用圓球尖端或平面尖端的方法近似理想壓頭時其壓痕過程中之接 觸面積相近，並無明顯差異。（3）作用力P 施加(Loading)時之壓痕三角形與卸載時(unloading)殘留於測試材料上之壓痕三角形係屬於相似形；因此，即使各該三角形之邊長因為該測試材料本身的機械性質所產生的滲入(sink-in)與堆放(pile-up)的效應而造成作用力施加與卸載時，壓痕面積上的差異。不過，該兩壓痕面積的角度卻是一致的。（4）當該作用力隨著該壓頭施加於測試材料時，若該壓頭產生某一程度的偏斜ψ 或旋轉ω 時，該殘留於測試材料上之壓痕三角形仍然具有代表性。（5）藉由觀察該殘留於測試材料上之壓痕三角形，當該三角形無法成為一正三角形時，其係表示壓頭已產生偏斜或旋轉的之情況，需要進一步對該偏斜角度ψ 或旋轉角度ω 進行修正。（6）在壓痕偏斜情況下硬度值的修正方法以投影面積修正為最佳，其次是壓痕體積再其次是壓痕接觸面積方法作修正。（7）在壓痕偏斜情況下硬度值修正方法的硬度誤差敏感度則以投影面積為最佳，其次是接觸面積再其次是壓痕體積修正方法。（8）本研究提出之修正方法經由矽、鋁單晶壓痕結果驗證，足以說明適用於工程學上金屬材料進行奈米壓痕硬度檢測時更精確的數據獲得。

Lipocalin 2 (LCN2), a 25-kDa secreted protein that belongs to the lipocalin family, is known to bind to a class of bacterial Fe-binding molecules known as siderophores. Iron is essential for bacterial growth. To obtain iron from host cells, bacteria produce siderophores, such as Enterochelin (Ent), to bind and transport host iron into the bacterial cell. In response, the host produces LCN2 to bind the iron-laden enterochelin, forming the tricomplex, LCN2: Ent: Fe3+. This inhibits bacterial growth as iron has been sequestered by LCN2. Devireddy et.al. 2005, proposed the binding of the tricomplex, LCN2: Ent: Fe3+ with the LCN2 receptor (LCN2R). This resulted in the internalisation of the complex, releasing the bound iron into the cell. The increase of intracellular iron was reported to cause cell mortality. Recent publications postulated 2,5-dihydroxybenzoic acid (2,5-DHBA) to be an endogenous mammalian siderophore homologue in mouse in vivo and in vitro studies, which could sequester LCN2 and iron. High iron concentrations in the brain have been consistently observed in Alzheimer's disease and Parkinson's disease. Accumulation of intracellular iron is known to be toxic to neurons, resulting in neurodegeneration. Hence, this study aims to determine the role of 2,5-DHBA as the mammalian siderophore in a cell culture model of neurodegeneration. We hypothesise that addition of 2,5-DHBA to cells exposed to LCN2 will result in increased iron uptake into neuronal cells, reducing cell viability. SH-SY5Y (human neuroblastoma) cell line was used in our study. To determine if SH-SY5Y is a suitable cell line, endogenous levels of LCN2 and LCN2R mRNA and protein expression were determined using reverse transcription-polymerase chain reaction (RT-PCR) and Western Blot analysis respectively. Preliminary results showed presence of both the LCN2R mRNA and protein but absence of LCN2 mRNA. This could be due to the low expression of LCN2 when not exposed to stress. Hence, to simulate conditions of neurodegeneration (by inducing high expression of LCN2), SH-SY5Y was treated with Kainic Acid (KA). After KA, LCN2 mRNA and protein expression levels will be detected again. With the successful upregulation of LCN2 gene expression, SH-SY5Y will be treated with 2,5-DHBA with KA treatment to determine cell viability using the MTS cell proliferation assay. A decreased cell viability or increased expression of pro-apoptotic genes would support the function of 2,5-DHBA as a mammalian siderophore in the brain. Furthermore, KA treatment can also be applied to microglial or astrocyte cell lines, which are known to secrete high levels of LCN2 when treated with KA. Co-culturing these cells with SH-SY5Y can allow us to study the downstream effects of secreted LCN2 from glial cells binding to the LCN2R receptors on SH-SY5Y neuronal cells. This study will help to further understanding of the relationship between 2,5-DHBA and cellular iron transport. If 2,5-DHBA is able to bind LCN2 and iron to increase intracellular iron levels in the neuronal cells, the formation of the tricomplex, LCN2: 2,5-DHBA: Fe3+, could be targeted for therapeutic interventions in neurodegenerative diseases by reducing intracellular iron levels to help ameliorate the progression of neurodegenerative diseases.

本研究係使⽤快速傅⽴葉轉換對⾦屬圓板撞擊產⽣的⾳頻進⾏分析，並搭配⾃製的運算叢集，來實現使材料辨識系統。本研究為分析⾦屬圓版與其相關之物理量對⾳頻的影響，吾⼈透過 Journal of Sounds and Vibrations 中的⼀篇 “The Influence Of Poisson’s Ratio On The Natural Frequencies Of Free Circular Plates”之公式，配合⼤量實驗做為數據轉換的基礎，找出⾦屬的Ψ值，如鋁為0.15762、鐵為0.28921、銅為0.36213，最後將之整合，並提出以機器學習的⽅式優化材料辨識系統，⼤⼤提⾼本研究之未來發展性。

Inflammatory Bowel Disease (IBD) is a prevalent disease of the West which pathogenesis is driven by a combination interaction between bacteria and inflammatory cells. In this study, two Kazal domain peptide from Palythoa Caribaeorum were identified. They were found to exhibit serine protease inhibitory, anti-bacterial effects and low toxicity, making them ideal candidates for IBD treatment due to their ability to inhibit inflammatory cell migration and bacterial load. We amplified their coding DNA sequences via PCR and ligated the resulting PCR product into pGEX-4T3 vector. The recombinant plasmid was verified by sequencing, and restriction digest before being transformed into competent E.coli cells. Following transformation, we induced target peptides expression by IPTG to confirmed successful transformation and peptide production. Selected transformed bacterial colonies were expanded in LB broth before mixing with glycerol and frozen in -80°C freezer to complete the process of cell bank production.

探討平面上n條直線，每兩條相交出一個交點，但不三線共點，並在每個交點上標上數字1至n-1，使任何一條直線上恰好出現1至n-1各一次。得到奇數條直線無法、偶數條直線可以。 推廣至三維空間，探討n個平面，每三個相交出一個交點，但不四面共點，發現到三維空間有兩種推廣方式： 一、在每個交點上標上數字，使每條直線上的數字都不重複 二、在每個交點上標上數字，使每個平面上的數字都不重複 在此兩種情況下，可見當有三個平面時皆可以。 探討第二種推廣後發現在六個平面時亦可以給出構造。而後又發現其等價於Baranyai's theorem故得到平面個數為三的倍數皆可以，再根據文獻構造出三維度空間9個平面的一種方法。

The aim was to determine whether there is an amount of gyroscopic force that keeps a bicycle wheel upright and stable. Two hypotheses were used, the first being as the mass of a wheel increases so does the force required to tilt the wheel by thirty degrees and the second that as the speed at which the wheel is spun increases so does the force required to tilt the wheel.

NO.61-01 2022 FEB | 科學研習期刊目錄 本期專題 2022第四屆全國科學教具創意設計競賽 「輪」番上陣比比看──橡皮筋彈力驅動車 | 黃昀孟、陳宥瑋、黃粲閎、陳怡君、高嘉鄖、詹志凡、戴明鳳 張拉整體結構的發展史與其應用 | 戴明鳳 張拉整體結構實作套件設計與操作──在科學教育推廣上的應用設計 | 邱彩瑄、余青諄、詹志凡、高嘉鄖、戴明鳳 「擺」的發展史與其運動週期測量技巧的深入探討 | 高嘉鄖、戴明鳳、張又懿 教學現場 滑輪組教具研製與創課活動設計 | 謝甫宜 湯匙擲球器與拋體運動課程 | 吳明德 氣球吉他 | 曾瑞蓮、許馨月、曾靖雯 科學新知 我國氣象觀測站網的建置和演進(一)臺灣北部地區 | 陳正改 特約專欄 閱讀有趣的科學繪本培養探索世界的好奇心 | 劉淑雯、黃譯平 STEAM簡易科學實驗──自製化石翻模 | 黃國展、黃琴扉、洪振方 森棚教官數學題——飛到西飛到東 | 游森棚 科普活動報導 運用能源議題融入國小低年級生活領域之實踐 | 黃真瑱、蘇萬生 2022第四屆全國科學教具創意設計競賽 | 洪偉清 科學有藝思 AI與創造它的科學家(一)艾倫．杜林 Alan Turing | 國立臺灣大學科學教育發展中心 總召集人的話 新春喜氣洋洋，《科學研習》月刊祝大家有個美好的開始。日常生活已離不開科學，科學改善生活也大量被商業化的使用到許多教育市場；良性的科學營隊有助於參與者的能力提升，掛羊頭賣狗肉的則需要大家互相提醒，免得受騙上當。108課綱的實施有新的氣象，學生在探究與自主學習上有更大的彈性，許多競賽場合也看到能量充沛的年輕人努力衝刺。召集人在大學端任教二十多年看過許多學術倫理樣態，很多是因為老師沒教、貪圖便利使然；期許大家做為年輕學子的典範，教導他們有正確的觀念：科學要求真、創作做自己、原創要鼓勵、沒做別掛名、抄襲不可取。 科學教具創意競賽 的成果透過文章來與讀者互相對話；早期資源短缺，許多報廢的線軸加上橡皮筋及冰棒棍就變成了線軸車，有了物理老師的加入，透過科學可以把童玩之美說得更清楚了。時間的量測跟許多的量測儀器一樣有其基礎原理及精巧之處，戴明鳳老師團隊從歷史的故事為大家介紹擺的科學以及探究的試驗。起重機、吊車、纜車、斜張橋、建築藝術等等都有著許多的線條加上桿件，這些桿件有個重要的名詞叫做二力構件，這些線條其實是許多的張力纜繩，這也是在高職機工科的靜力學會學到的內容；從歷史角度的回顧以及許多建築藝術的表現，除了讓人驚豔也讓人不禁想自己也跟著做一下。 教學現場 有三篇文章，「滑輪組教具研製與創課活動設計」、「氣球吉他」及「湯匙擲球器與拋體運動課」。第一線的科學老師是票房保證，謝甫宜老師透過自製滑輪組的組裝及步驟教學，培養學生藉由實作活動探索作功vs.位能關係、如何達到省力的目標、如何完成省時的任務等重要核心概念；有科學內容、有探究、有實作、有討論，過程中的問題解決以及形成性評量都契合現有九年級的定滑輪及動滑輪教學。氣球吉他的製作連結了音樂及物理學，音樂及物理的關係是非常美的數學特徵值問題，科工館曾瑞蓮研究員科學團隊，在文章中提出的探究及操作都非常值得深入推敲。經驗豐富的吳明德老師透過簡易設施輔以APP軟體，藉由實際數據量測計算讓學生動手有感，這是很好的科學學習模式，吳明德老師文章寫作的精準也可以做為未來投稿者學習典範。 科學新知 當我們輕易地透過網路擷取許多氣象資訊時，我們有沒有想過這些不同地區的資訊是如何匯集的？當有地震警報時，不同地區的反應資訊又是從何而來？完整的自動氣象觀測站網和強地動監測站網對於預警、救災都有很即時的助益。想知道全台616個氣象觀測站的分布、氣象儀器的自動化程度以及氣象站否有人員駐紮等等問題，資深氣象人陳正改說給你知道我國氣象觀測站網的建置和演進──臺灣北部地區。 「閱讀有趣的科學繪本培養探索世界的好奇心」在新聞台很少報導國際新聞的年代，蚊子老師提供我們日本的科學繪本出版資訊，有大多是自製少數翻譯，科學範疇則從生命體、星空、圖形、數理甚至到歷史文化都能見到科學的樣貌。蚊子老師也提到 ：「與其說科學是門知識，筆者更認為科學是一種思考習慣；科學不是專門要考倒你的試卷題（在考試制度的教育下很容易落入這樣的思維），而是在日常生活就存在的事物。」期待大家看此文章並感受日本科學繪本的魅力。「STEAM簡易科學實驗—自製化石翻模」做石膏模型是大家小時候美好的記憶，當石膏與化石有所連結時，透過黏土壓印物件製作翻模工具，以及石膏調製製作模型，文中提到與5E之間的關聯、與STEAM間的關聯；除了石膏之外，還有很多科學內容期待大家開發。「飛到西飛到東」又到了動腦時間了，想像有老人、大人、小孩在操場上繞圈圈，何時他們會交會在操場跑道上的某一點？噢不！森鵬教官的問題是蜜蜂直線的來回，要大家費點心，畫一下、想一下。 「運用能源議題融入國小低年級生活領域之實踐」能源議題攸關民生，也是社會上許多爭議的來源，如何從小培育學生具有科學的認知以及批判的能力，是未來的主人翁應該有的基本素養。風能是能源的一個來源，風的科學、風的物理學、海浪等等…這些都需要更多科學的解釋。 科學GO好玩 「2022第四屆全國科學教具創意設計競賽」洪偉清主任以嫻熟的方式辦理大型競賽活動—第四屆全國科學教具創意設計競賽推廣與創新，文章中除了傳遞舉辦活動的精神及理念也嶄露如何經營及廣邀各界參與的各式輔助工作坊及分區競賽；透過活動拔擢具設計巧思，有動手實踐能力的同學，是提高學生參與及動手的最好機會。能動手有巧思是要鼓勵的對象，有原創不抄襲不找人捉刀是參與者的科學精神。 總召編輯委員 - 李旺龍 關於本刊 出版單位：國立臺灣科學教育館 發行人：劉火欽 總召集人：李旺龍 編輯委員： 物理科吳仲卿/陳耀榮/李柏翰/盧玉玲 | 化學科古建國/許良榮/王伯昌/林如章/周金城 | 生物科王美芬/蕭世輝/陳建志/郭淑妙 | 地球科學許民陽/王郁軒/李文禮/謝隆欽 科技科張玉山/汪殿杰/林育沖/趙珩宇 | 數學科李源順/鄧家駿/溫世展/張宮明 | 跨領域學科李名揚/連信仲 | 特約專欄 游森棚/黃琴扉/陳正改/劉淑雯 策劃：曾聰邦 主編：吳中益 本月專題特約主編：李源順 編輯：佟冠誼/林博雅 網頁設計編輯：施曉恬 投稿規範請來信詢問：article@mail.ntsec.gov.tw

聚苯胺導電高分子的發展蓬勃迅速， 其應用也愈趨廣泛， 金屬防蝕為其可能應用之一。台灣四面環海， 工業發達， 造成金屬腐蝕損害嚴重。本文為探討聚苯胺導電高分子在鐵系金屬防蝕上之應用， 針對以下各點進行研究：（ 1.） 探討導電高分子聚苯胺性質與合成方法（ 2.） 探討聚苯胺導電原理（ 3.）測試不同腐蝕條件下聚苯胺的防蝕效果（ 4.）探討聚苯胺防蝕原理（ 5.）各種氧化還原態聚苯胺防蝕效果之比較。實驗結果顯示塗布聚苯胺與未塗布聚苯胺之鐵系金屬（ 生鐵、不鏽鋼、鍍鋅鐵）在3﹪ 氯化鈉、0.5M鹽酸、1M 鹽酸鹽酸溶液中之腐蝕狀況， 以鹼式中間氧化態聚苯胺（ Emeraldinebase）最具防蝕效果。聚苯胺防蝕機構包含阻隔防護、腐蝕抑制劑、陽極保護、惰性化、形成保護性氧化物薄膜、阻礙離子擴散速率、電化學介面遷移等機構。\r 英文摘要：\r The development and application of the conducting polymer polyaniline is getting prosperous and popular. One of the applications is corrosion protection. Because Taiwan is surrounded by sea and the pollution of industry is more and more serious than before, the damage of corrosion is greater and should be properly controlled. In this paper, the authors attempted to study the effect of the corrosion protection of polyaniline in ferrous metal. This study could be divided into four parts: (1) the study of the property and synthesis methods for the conducting polymer polyaniline, (2) the conduction theory of the polymer polyaniline, (3) The corrosion protection effects of the polymer polyaniline under different corrosion situations, (4) the corrosion protection theory of the polymer polyaniline, and (5) the comparison of the corrosion protection effects of various polymer polyanilines. According to the experimental results, the Emeraldine-based polyaniline gets the best corrosion protection effect. The mechanism of corrosion protection may be the result of the following ones: barrier protection, corrosion inhibitor, anode protection, innobeling, chemical active layer, inhibition of diffusion rate, and the shift of electrochemical interface.

從蝴蝶定理（Butterfly theorem）的圖形進行發想，在前人作品發想出研究方向，除了在圓與正方形以外，在其他圖形上討論蝴蝶形的其他性質是否有不同的發現？我們在圓、橢圓、拋物線與雙曲線之重疊圖形上作出對稱與非對稱蝴蝶形，對其面積、邊長、角度進行計算與歸納，再推廣到在拋物線上另找任意兩點做蝴蝶形；在研究過程中，我們也發現了圖形上一些特殊的性質，進行一連串的研究。且以普通高級中學課程綱要中數學科課程綱要內容為我們推論工具，希望能讓多數高中程度的學生均能了解我們的發現。

Dye-sensitized solar cells (DSSCs) have cheaper and easier means of fabrication compared to the currently used solar cells, which are mostly silicon-based, so DSSCs are developed for a prospect of solar energy accounting for a higher percentage in the world’s total energy production, which is currently 0.1%. However, compared to their inorganic counterparts, their efficiencies are low, and the search for a dye that will maximize the potential of DSSCs is still ongoing. The aim of this study is to be able to evaluate the absorption range in the solar spectrum of dyes extracted from Basella alba leaves and Bixin orellana seeds, and of dyes resulting from the mixture of both extracts, using UV-Vis Spectrophotometer, with the objective of increasing the absorption; to be able to fabricate functional DSSCs from the individual and mixed dyes; and to be able to evaluate the different conversion efficiencies of the DSSCs of the individual and mixed dyes using Linear Sweep Voltammetry, with the aim of increasing the conversion efficiency due to a wider absorption range. B. alba leaves and B. orellana seeds were extracted using soxhlet extraction. The clean extracts were mixed in different proportions, and were characterized using UV-Vis Spectrophotometer. The two individual dyes together with two proportions of the mixed B. alba:B. orellana dyes, 1:1 and 2:1, were then incorporated into DSSCs. In the fabrication of DSSCs, twelve plates of Fluorine doped tin oxide were coated with titanium dioxide (TiO2) using spray pyrolysis. They were sintered and scraped, and were afterwards immersed in the four dyes for four days. Platinum plates were placed on top, and iodine-triiodide couple electrolyte was introduced via capillary action. The sealed DSSCs were subjected to Linear Sweep Voltammetry under dark and illuminated conditions, using a sun simulator. Results from the UV-Vis spectrophotometry showed that mixing the dyes had increased the absorption range of the individual dyes, although not superpositionally, and that the 2:1 mixed dye has the most potential. Being incorporated into DSSCs, the dyes, including the mixed ones, have successfully converted solar energy into electrical energy, as shown by the significance in conversion efficiencies under dark and illuminated conditions. However, despite the increase in the absorption range, neither of the mixed dyes have shown a higher conversion efficiency than the individual ones, which can be accounted for a possible weaker interaction between the two dyes and the TiO2, resulting to lower efficiencies. The study has been able to obtain and characterize dyes from B. orellana seeds and B. alba leaves and has been able to incorporate the dyes into DSSCs. With the wider absorption range of the mixed dyes, the study has been able to confirm the possibility of the dyes to maximize the potential of DSSCs, as shown by the successful conversion of solar energy into electrical energy of all fabricated DSSCs, including those of mixed dyes. If the possible problem with the dye-dye as well as the dye-TiO2 interactions could be solved, the possibility of much higher conversion efficiencies could be expected.

Research Question: To what extent does totarol show antibiotic potency against significant strains of Staphylococcus aureus causing skin and soft tissue infections in New Zealand, compared with commonly prescribed drugs used to treat the specific strain of Staphylococcus aureus being tested? Purpose of research: This essay will investigate the antibacterial potency of totarol against significant strains of Staphylococcus aureus (S.aureus) causing skin and soft tissue infections (SSTIs) in New Zealand. Only a small amount of research on totarol has been conducted. They all suggest totarol possesses antibiotic potency against various species of bacteria. The mode of action of totarol is currently unknown. Procedure 1: The totarol I ordered from Mende Biotech Ltd arrived in two forms; a powder called Totarol™ and a viscous brown liquid called Liquid K7 (LK7) in which the Totarol™ powder was dissolved in mostly sunflower oil. The investigation took place in two stages. In the first stage, the MIC value of the LK7 against reference strain S.aureus 29213 was determined by following the CLSI methodology for MIC testing (M07-A9 Clinical and Laboratory Standards institute). The MIC test was also conducted to identify whether any major ingredients in the LK7 possessed significant antibacterial potency. MIC values where compared with that of flucloxacillin. Data from stage 1 testing: LK7 had an MIC value of 1µg/mL, which was very similar to flucloxacillin’s MIC value of 0.5µg/mL. No other major ingredients in LK7 showed antibacterial potency. Totarol™’s antibacterial activity could not be accurately measured, due to the powder resisting even mixing. Procedure 2: In the second stage, disc diffusion tests were conducted against various S.aureus clinical isolates obtained from SSTIs in the Waikato community. The discs that were placed for each clinical isolate included LK7, cefoxitin, fusidic acid, mupirocin and erythromycin discs. Data from stage 2: 75% of LK7 discs produced double zones of inhibition. I hypothesized that this was due to two active ingredients found in the LK7. I predicted the one that produced larger zones of inhibition to be Totarol™. The other more stable ingredient producing the inner zones of inhibition is unknown. Conclusion: I proposed a breakpoint of outer zone sizes that were ≥ 15 mm in diameter to signify that that particular clinical isolate was ‘susceptible’ to LK7. From this breakpoint, LK7 and fusidic acid both had the same number of clinical isolates that were classified as ‘susceptible’. LK7 was the median of the number of susceptible clinical isolates. This data answered my research question; totarol in the LK7 form specifically, would be just as effective in treating SSTIs caused by S.aureus, as even the most commonly prescribed antistaphylococcal drugs currently being used.

The purpose: To study the basaltic prisms to understand their formation. Tasks: To study chemical and mineral composition, textures and density of basalts of central and peripheral parts of prisms, to reveal the possible difference as a consequence of the formation of Benard sells. Basalt prisms have 6-5-4-face shape with a diameter 10 -50 cm and height of 30-40m. They are divided by transverse fracture in blocks of 20-50 cm. Prismatic jointing of basalts widespread throughout the world. There are many theories about its origin. We decided to collect data to identify the most appropriate of these. We suppose that if the hypothesis about the role of Benard cells is correct then the properties of basalt in the central and peripheral parts of the prisms must be different. If we consider the center of the prism as the center of the cell, where the hot matter rise, spreading out to the periphery and lower in the peripheral part, it is likely that the density of basalt forming in the center must be lower than at the periphery and later crystallization should lead to a slightly more acidic basalt in the middle. We determined the density of basalts of different parts of prisms. And the density of central part basalts was equal to 2.502g/sm3 and of peripheral part basalts was equal to 2.907g/sm3. X-ray fluorescence analysis showed that basalt of central part contain 12,91% Si and of peripheral part only 10,17%. Basalt of central part is depleted of Fe, Mn, Ti, Mg compared with of peripheral. We investigated samples and thin sections of basalts under the microscope MIN-8. For basalts of peripheral part flow texture expressed by the orientation of the microlites are characteristic. In the central part flow texture are poorly expressed but we can see many phenocrysts. Our data reveal a significant and expected difference between the basalts of central and peripheral parts of prism, that are the evidences in favor of the hypothesis about the role of Benard cells in the formation of basalt prismatic jointing.