2024-05-24
封面插圖描繪了大腦的橫截面,其內(nèi)部結(jié)構(gòu)被逐層逐級的細(xì)節(jié)所取代。透過表層逐步深入揭示出了單個細(xì)胞、表觀遺傳學(xué)及遺傳數(shù)據(jù)等信息,而核心部分則代表著尚未解答的問題。本期特刊登載了來自PsychENCODE聯(lián)盟的論文,該聯(lián)盟的研究人員通過在細(xì)胞和分子水平上研究人類大腦,深入調(diào)查研究了神經(jīng)精神疾病的基礎(chǔ)病因。
Thisillustrationdepictsacrosssectionofthebrain,withitsinternalstructurereplacedwithprogressivelevelsofdetail.Goingbeyondthesurfacerevealsindividualcells,epigenetics,andgeneticdata.Thecorerepresentsquestionsthatremainunanswered.ThisissuefeaturespapersfromthePsychENCODEConsortium,whoseresearchersinvestigatedthebasisofneuropsychiatricconditionsbystudyinghumanbrainsatthecellularandmolecularlevels.
2024-05-31
銅鵑是一種寄孵鳥,也就是說它會把卵產(chǎn)在其他鳥的巢里,然后由寄主鳥孵化和撫養(yǎng)它的后代,例如封面圖展示的這只美麗的細(xì)尾鷯鶯就是寄主鳥,它在喂食銅鵑的幼鳥。寄主鳥通常會拒絕外來的雛鳥,這就導(dǎo)致杜鵑會選擇模仿寄主雛鳥。當(dāng)一種杜鵑利用幾種寄主物種時,對不同寄主的模仿選擇會導(dǎo)致杜鵑的遺傳分化為不同的譜系。這項研究揭示出了原物種間的相互作用是如何促進(jìn)新物種形成的。
Bronze-cuckoosarebroodparasitesthatarerearedbyhostbirds,suchasthissuperbfairy-wren.Hostsrejectforeignnestlings,whichhasselectedformimicryofhostnestlingsbycuckoos.Whenacuckoospeciesexploitsseveralhostspecies,selectionformimicryofdifferenthostsdrivesgeneticdivergenceofcuckoosintodistinctlineages.Thisresearchshowshowspeciesinteractionscancontributetospeciation.
2024-06-07
6d95feb037385f329ec9b0d81edc9552565bb3b1c639b2353197671057439f4c封面圖展示的是由彎曲的折紙結(jié)構(gòu)模擬的單細(xì)胞原生生物天鵝長吻蟲利用像頸部一樣的細(xì)胞隆起物,快速及可逆轉(zhuǎn)地延伸搜尋獵物。通過高分辨率成像和放大的折紙實驗,研究人員展示了螺旋形褶皺中的拓?fù)淦纥c(diǎn)如何控制展開。這一發(fā)現(xiàn)讓我們得以一窺單細(xì)胞的行為幾何控制,并有可能應(yīng)用于太空建筑及微型機(jī)器人。
Thesingle-cellprotistLacrymariaolorusesrapid,reversibleextensionsofthecell’sneck-likeprotrusiontohuntthatareenabledbyacurvedcreaseorigamistructure.Throughhighresolutionimagingandscaled-uporigamiexperiments,researchersshowhowtopologicalsingularitiesinhelicalpleatscontroldeployment.Thisdiscoveryoffersaglimpseintogeometricalcontrolofbehaviorinsinglecells,withpotentialapplicationsinspacearchitectureandmicrorobotics.
2024-06-14
當(dāng)晶格匹配的二維鈣鈦礦BA2FAPb2I7(圖中紅色部分)——其中BA是丁基銨,F(xiàn)A是甲脒——被摻入黃色相FAPbI3基質(zhì)(圖中黃色部分)中時,二維晶體會呈現(xiàn)出類似于鈣鈦礦的表面,可以作為FAPbI3轉(zhuǎn)換為光活性相(圖中黑色部分)的模板。由此產(chǎn)生的相穩(wěn)定狀態(tài)的FAPbI3在低于85℃及日照條件下會表現(xiàn)出顯著改善的光電性能和出色的穩(wěn)定性。
Whenthelattice-matchedtwo-dimensional(2D)perovskiteBA2FAPb2I7(red)—whereBAisbutylammoniumandFAisformamidinium—isincorporatedintoayellow-phaseFAPbI3matrix(yellow),the2Dcrystallitespresentaperovskitelikesurface,whichservesasatemplatefortheFAPbI3toconverttoitsphotoactivephase(black).Theresultingphase-stabilizedFAPbI3showssubstantiallyimprovedoptoelectronicpropertiesandexceptionalstabilityunder85°Candsunlight.