全國中小學科展

依國際科展年度查詢

臺灣

Complicated reproductive system in the Brown-foot Ant, Technomyrmex brunneus. (Hymenoptera: Formicidae)

本研究主要針對棕色扁琉璃蟻的生殖型蟻以及其生殖行為進行探討。在生殖季節中,處女蟻后出現的比例明顯高於有翅型雄蟻。而蟻后的死亡率高,且其所產下的卵有27%為畸型卵,具有生殖衰退(reproductive decline)的現象。此外,部分棕色扁琉璃蟻聚落中,蟻后會被工蟻逐出巢外並進行搬運屍體、搬運廢棄物及覓食等職蟻的行為。 有別於大多數的蟻種,棕色扁琉璃蟻存在著工蟻型雄蟻(Ergatoid male)和具有生殖能力的工蟻。工蟻型雄蟻的外型與氣味皆與一般工蟻相似,羽化後即具有生殖能力,可與聚落中多隻生殖型工蟻行多次交配(multiple mating);而可生殖的工蟻又包含三種中間階級(intercaste),於體長、複眼數目、胸線皆有所差異,微卵管數目則可依階級分為4至6條、12至14條、18至22條三種範圍。 棕色扁琉璃蟻的繁衍方式是多樣且複雜的:聚落中主要由生殖型工蟻進行有性生殖及孤雌產雌,繁殖出蟻后、工蟻和二種型態的雄蟻。而蟻后則可與有翅型雄蟻交配,但只產出一般工蟻及生殖型工蟻。 本研究首次提出了棕色扁琉璃蟻具有工蟻型雄蟻,而對這種具有複雜生殖方式的社會結構之探討,也為聚落發展的方式提供了一個新的研究方向

乒乓球彈跳運動研究

為了測量測量乒乓球彈跳,設計了測量的方法,基本構想是將乒乓球在木板上的彈跳(接觸與離開)視為開關的ON與OFF,將訊號產生器所產生的電訊號接到乒乓球上,木板接到電腦錄音輸入端,當乒乓球與木板接觸時,形成通路訊號進入電腦,由錄音程式加以記錄,反之為斷路,記錄停止。但如何將乒乓球、木板由不能導電的絕緣體轉換成可以導電的導體,而又不能影響乒乓球原本彈跳性質?想出了用2B鉛筆(含石墨)將乒乓球、木板塗黑轉變為導體的方法,解決這個問題後,成功測量出以下乒乓球彈跳時各項的記錄:1.彈跳次數2.碰撞作用力3.接觸時間4.飛行時間。最後以力感測器直接測量碰撞作用力,來驗正此實驗正確性。

為「世紀之毒」找解藥!- 探討以Pseudomonas mendocina 菌株降解污染土壤中戴奧?

本研究採自中石化安順廠戴奧辛污染場址之土壤,篩選出一株純 菌微生物(Pseudomonas mendocina NSYSU) , 其含有PCDD/Fs (Polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans, PCDD/Fs)土壤於實驗室進行微生物降解試驗,結果顯示約21 天即有 明顯降解結果;本研究同時觀察到該微生物能在汞濃度達50 ppm 之 戴奧辛土壤中,仍具有相當程度之耐受度,並進一步降解戴奧辛化合 物。 我更以標準品探討菌種對於戴奧辛類化合物(Dioxin like congener) 之降解效果,成功地發現這株菌種不僅對於PCDD/Fs 有降 解能力,對於戴奧辛類化合物也有明顯之降解效果。 由研究結果,明顯看出P. mendocina 菌株為「世紀之毒」找到了 解藥,開發出以生物復育改善污染環境的一種新方法。A dioxin-degrading bacterial strain Pseudomonas mendocina NSYSU was isolated from dioxin contaminated soil by selective enrichment techniques. In our previous study, P. mendocina NSYSU was found to be able to use pentachlorophenol (PCP) as its sole carbon source and energy source and was capable of completely degrading this compound. Moreover, P. mendocina NSYSU was also able to mineralize a high concentration of PCP up to 150 mg/L. In this study, P. mendocina NSYSU was investigated for its ability to degrade polychlorinated dibenzofurans (PCDFs) and polychlorinated dibenzo-p-dioxins (PCDDs). Results show that P. mendocina NSYSU could grow well in media containing both PCDFs and PCDDs, and was able to degrade both compounds efficiently. In this study, isotope dilution method and a high resolution gas chromatography-mass spectrometry (HRGC/HRMS) technique were applied for the analyses of PCDFs and PCDDs. Investigation results reveal that significant biodegradation of octachlorinated dibenzo-p-dioxin (OCDD) and octachlorinated dibenzofuran (OCDF) by treating with P. mendocina NSYSU resting cells was observed. The results also indicate that this bacterial strain is able to biodegrade OCDD and OCDF effectively under anoxic conditions due to its facultative anaerobic character. No accumulation of inhibitory toxic byproducts was found in this study. These findings suggest that in situ or on-site bioremediation of dioxin-contaminated soils by using indigenous microorganisms or inoculated P. mendocina NSYSU strain would be a feasible technology for field application.

咀嚼口香糖對於記憶力與情緒放鬆的影響

本研究採用受試者內實驗法進行設計,以2*2*2=3個因子(糖分*刺激口味*咀嚼時間),加上2次不同時間咀嚼運動與對照組,一共有11次實驗。每次實驗量測短期記憶與短期工作記憶共6種題項,並透過心律變異器、簡單的腦波偵測儀與問卷調查,瞭解咀嚼口香糖對於情緒放鬆的影響。 研究結果發現:咀嚼無糖口香糖對於數字廣度記憶有較佳的效果,反倒是咀嚼有糖薄荷口香糖時,則數字廣度記憶效果最差,甚至比單純咀嚼運動或對照組來得差。其次,在情緒放鬆上,受試者都認為咀嚼有糖薄荷口香糖,其糖分的味覺與薄荷的嗅覺有助於放鬆情緒,但透過心律變異器量測交感神經活性指數與副交感神經活性指數,反倒是增加緊張與焦慮的情緒。其次,從記憶力與心律變異結果得知-有糖分的口香糖會使得情緒較為緊繃與無法鬆懈,因此導致記憶力也跟著有降低的趨勢。但如果經過咀嚼15分鐘後,再進行記憶力量測時,其情緒較為輕鬆而記憶力也有所提升。 咀嚼口香糖對於記憶與情緒並沒有太大改變增加,因此,本研究建議如果真的有咀嚼口香糖習慣的人,可咀嚼15到20分鐘再進行相關工作,如此將有稍顯幫助工作績效。但咀嚼有糖分與刺激口味的口香糖,可能會造成反效果。

以二極體汲發之 Nd:YAG 雷射之探討

Nd-YAG Laser 是目前最常被用來當作Pumping Source(汲發光源),較早期是使用discharge lamppumping,但是閃光燈的發光頻率並非完全落在Nd-YAG 晶體的吸收帶上,因此大量的能量轉變為熱能,十分的浪費能源,且增加冷卻系統的負荷。因為discharge lamp pumping 是一種氣體放電的過程,每次放電的時間和能量都有很大的不穩定性。所以高效率、高穩定性的Laserdiode 便成為pumping source 的另一種選擇。在此實用價值下,便決心以一組Laserdiode Pumped Nd-YAG Laser的套件,使用AlGaAs Laserdiode 作為pumping source,來汲發Nd-YAG 晶體,所有物件被固定在同一個rail(軌道)上,從對光到汲發晶體(增益介質Nd-YAG 晶體),到產生1,064nm 的紅外光雷射,及其倍頻532nm 的綠光雷射,正可作為一完整的雷射訓練過程。

紫茉莉生物時鐘機制的研究

Mirabilis Jalapa is a wild flower, which is often seen in countryside of Taiwan. This plant blossom regularly every day around PM 3:00-6:00. Since its regular behavior, it has the potential to become a model plant for research on circadian ryhtem. According to the on spot observation, a Mirabilis Jalapa will bloom consistently, whereas a minority of flower will bloom earlier or later. First, we observe how Mirabilis Jalapa response to disparate environmental conditions. Under a short period of light(8h) and an average period of light(12), Mirabilis Jalapa acts as normal. But under a long period of light, it flowers approximately 1h ahead of time. When under a continuous light, Mirabilis Jalapa shows a regular flowering in the first four day, and after that, circadian rythem of flowering terminate. The ripe flower buds mentain unbloom for 10 days or more, finally end up withered. Meanwhile, floral meristems are also suppressed. Temperature alter seems affct the flowering slightly. Second, we use SDS-page to detect protein divergence 6h interval.But as many of the earlier attempt, the floral stimuli is not sensible for average protein qualitative analysis. So we decide to take more direct approch by genetic experiment. From supplemental material of article” Orchestrated Transcription of Key Pathways in Arabidopsis by the Circadian” we obtain a group of genes regulared by bioclock in Arabidopsis.With Bio Informatics we choose 41 single gene, and compare with sequences in other species, designing promotors to isolate similar genes in Mirabilis Jalapa. Use rt-PCR to detect the level of certain gene expression,and compare characters of those genes in Mirabilis Jalapa with those genes in Arabidopsis. We also blast those 453 genes to the database of animal, trying to recognize some genes that is widely separated between disparat species. And test these genes in Mirabilis Jalapa to confirm this result.本實驗先針對紫茉莉開花生物時鐘的特性進行觀察,並以不同的變因測試對紫茉莉開花時鐘的影響,紫茉莉個別花朵開花生物時鐘並不一致,長日照會對植株造成開花時間提早(約1 小時)的影響,全日照則會對花芽分生及開花行為造成抑制,溫度對於開花影響不明顯。而後利用蛋白質電泳對不同時間點的樣本進行分析,由於開花激素存量極微,故並電泳結果無明顯差異。再來以阿拉伯芥已知與生物時鐘有關的基因中經過生物資訊(Bio Informatics)預測在紫茉莉中存在與開花及光週期有關之基因(CAA75629 CAB56039 AAB60305 AAC49807 AAA82068),針對該基因進行表現量的測定,驗證該基因與開花生物時鐘的關聯性。針對動物界與植物界中已知與生物時鐘相關的基因進行交叉比對,希望找出跨界廣泛存在的生物時鐘基因,接著測試紫茉莉中該基因的存在與否及表現狀況與其他物種的差異,驗證該基因分布的廣泛性。

3D立體建構模擬之研究

現在的市面上,四處充斥著各式各樣的電玩或是3D立體動畫,但是在呈現動畫的\r 時候,依然存在著很多地方的不足,與狀況表現上的矛盾情形!於是令我興起:一個普\r 通的高中學生,是否也有機會運用所學的知識,創造出自己的虛擬實境?\r 我嘗試地寫出各種物體架構的函數,再對這函數圖形所呈現出的立體加工處理,使\r 它能自由的運動,甚至使它能多采多姿就有如我們在現實生活中所看見的一般,有著自\r 己的花紋與圖案!\r 期望在架構完整之後,有一天,我們這些學生可以不再被那些軟體公司牽著走,花\r 大把的錢買電腦動畫中種種的不合理,而可以自己擁有自己的3D 世界!!

最小積包絡現象

思考公車車門開關時在地面上掃過的區域形狀與面積時,發現其中變動的直線為過定點與座標軸圍成三角形面積最小的直線,我們很好奇,這類圍成最小面積的直線更進一步的包絡現象,所以就動手去嘗試做研究。\r \r The research is done out of the curiosity we had when we pondered over the area and the shape a bus door sweeps on the floor when it opens or closes, and thus to discover the graph of the varying line which forms the smallest area so that we attempt to do research on such envelopment phenomena.

太陽系外行星光度研究

搜尋太陽系外行星(extra-solar planet;exoplanet)是當今天文學家最重要的計畫之ㄧ;其中,當系外行星經過其主恆星碟面時,會造成光度略微下降,稱之為凌日現象(transit) 。本研究便是利用鹿林天文台SLT(Sne Little Telescope)望遠鏡來拍攝兩顆已知的系外行星HD 189733 b 和HD 209458 b在凌日時的影像。 我們得到約4000 張影像,再經過影像修正與資料分析後,我們作出凌日光變曲線圖、Bin圖及相位圖,並從中探討其特性。 經分析判斷後,HD 189733 看到一個剛開始發生和一個完整的凌日現象,分別由B濾鏡和 R 濾鏡所拍攝;而 HD 209458 則看到兩個剛開始發生,三個要結束的凌日現象,分別由B濾鏡、R 濾鏡和 Hα 濾鏡。 並由光變曲線,推得HD 189733 的基本參數,包括:行星半徑為 1.242個木星半徑、軌道傾角為88.94 度以及軌道半徑為 0.03115 天文單位。 Since 1995, more than 200 extra-solar planets have been found. Until today, astronomers still make efforts in searching extra-solar planets because it’s one of the most important projects in this century. During the crossing by the stellar disks (i.e., transits), the exoplanets will cause the brightness to decrease by a small amount. In the project, we have focused on the observations of two known transit exoplanets, HD 189733 b and HD 209458 b. The photometric observations were performed with the 40-cm SLT telescope on the Lulin Observatory. The results from the image procuring, data reduction and analysis are presented. We accrue and plot the light curve, bin and phase. We found out that HD 189733 has two transit ingresses with B, R band, and HD 209458 has two transit ingresses, two transit egresses with B, R, Hα band on phase. We figure out planetary parameters, RP is 1.242 RJ, inclination is 88.94° and orbital semi-major axis is 0.03115 AU by transit light curve.

長方體內最少完全城堡數

我們試著尋找所需最小的城堡個數以看守整個a × b × c (a,b,c ? N) 的長方體。所謂城堡是一種棋子,當放置城堡的位置是(x, y, z) ,則(x, y,t)、(x,t, z)、(t, y, z) (t 是任何不超出邊界的正整數)是這個城堡可以看守的格子。我們用這些城堡來完全看守長方體,試著找出其最小值。在2005 年我們猜測了a = b = c 、a = b c 、a > b > c 的上界,而在2006 年時完成了a = b = c 、a = b c 的大部分情況的證明,少數不能解決的部份也提供了不錯的上界。目前我們在a = b = c 、a = b c 的情況幾乎完全解決,目前正在向a > b > c 的部份發展。A generalized searching method of finding the minimum number of castle which can oversee all over the rectangular box, defined as a × b× c (a,b,c ? N) , is presented. The castle here is defined as one kind of chess. The castle positioned as (x, y, z) can direct the lattice points of (x, y,t) 、(x,t, z) 、(t, y, z) (t is the positive integer and smaller than the box size). These castles we use here is to oversee the rectangular box and to help us to find the minimum number. In 2005, we got the upper bound of overseeing the rectangular box in the conditions of a = b = c、a = b c、a > b > c , while in 2006 we complete the proofs of the minimum number of castles based on the conditions of a = b = c 、a = b c . The further work we want to attain is to complete the case of a > b > c.