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生物學(xué)范文第1篇

英文名稱：Journal of Biology

主管單位：安徽省科學(xué)技術(shù)協(xié)會

主辦單位：安徽省科協(xié)合肥市科協(xié)

出版周期：雙月刊

出版地址：安徽省合肥市

語

種：中文

開

本：大16開

國際刊號：1008-9632

國內(nèi)刊號：34-1081/Q

郵發(fā)代號：26-50

發(fā)行范圍：國內(nèi)外統(tǒng)一發(fā)行

創(chuàng)刊時(shí)間：1983

期刊收錄：

CA 化學(xué)文摘(美)(2009)

中國科學(xué)引文數(shù)據(jù)庫(CSCD―2008)

核心期刊：

期刊榮譽(yù)：

Caj-cd規(guī)范獲獎(jiǎng)期刊

聯(lián)系方式

期刊簡介

生物學(xué)范文第2篇

2012年是回歸之年，無論是伸展臺上所預(yù)測的流行趨勢，還是配飾精心的點(diǎn)綴，無疑不向經(jīng)典致敬。Missoni出品的頑皮猴子吊墜珠寶耳環(huán)，Versace的海馬珠寶戒指，Lanvin的立體蛇形珠寶項(xiàng)鏈……在2012的流行秀場里，這些造型迥異的配飾，為服裝點(diǎn)睛，扮演著讓人難以忽視的角色。

珠寶之于女人，就如同鐘表之于男人，一個(gè)用來裝點(diǎn)女人的氣質(zhì)和典雅，一個(gè)用來提升男人的氣場和品味，其閃耀是任何人都無法抵擋的致命誘惑。

要追蹤珠寶的動(dòng)物奇遇記，還得從傳奇的珠寶品牌卡地亞說起。起初，路易·卡地亞用一些小型的石頭雕塑制作了一些裝飾性的動(dòng)物作品，以全新的手法來詮釋世紀(jì)初由俄羅斯設(shè)計(jì)師法貝熱所創(chuàng)造出的微縮世界，展現(xiàn)一個(gè)更加豐富多彩的大自然。

蛇的鱗片、瓢蟲的翅膀、貓頭鷹的頭、鸚鵡的羽毛，卡地亞的作品在細(xì)節(jié)中傳遞著不同時(shí)代的審美趣味。縱觀其眾多的傳世臻寶，足以稱得上是一座真正的動(dòng)物美術(shù)館。1906年，卡地亞在巴黎制作了一款貓頭鷹晚宴包，浮雕雕刻的磨砂黃金材質(zhì)，鑲嵌玫瑰式切割的四顆圓形祖母綠鉆石，這款黃金網(wǎng)狀的晚宴包驚艷非常。

卡地亞的動(dòng)物珠寶就如同一個(gè)神奇的盒子，裝滿了大自然的賦予。而卡地亞這位傳奇的珠寶大師，在形式、抽象學(xué)、幾何學(xué)和動(dòng)物之間變幻，游刃有余。1920年，他創(chuàng)作出一款獨(dú)特的香煙盒作品，只用極簡的黑瑪瑙和黃金，惟妙惟俏地呈現(xiàn)了一直鱷魚棲息在巖石上，準(zhǔn)備吞食黑月亮。

當(dāng)以卡地亞為首的珠寶品牌掀起動(dòng)物珠寶設(shè)計(jì)浪潮之后，設(shè)計(jì)們與藝術(shù)家們意會到動(dòng)物世界的巨大靈感，紛紛開始效仿。以動(dòng)物的模型，展現(xiàn)著人類世界，不但表達(dá)了愛情和生命等主題，甚至還能表現(xiàn)戰(zhàn)爭與和平等重大主題。

一件有趣的事情是，在珠寶的世界里，萬獸之王并非獅子或者老虎，而是蛇，各種姿態(tài)，各種色彩的蛇。Anna Hu、Dior、Boucheron、Piaget、Cartier等品牌幾乎都推出過以蛇為造型的珠寶。Cartier曾為墨西哥性感女星瑪利亞·菲利克斯制作一條以2473顆鉆石組成，總廠57厘米，重600克的蛇形項(xiàng)鏈，看上去栩栩如生，充滿靈性。

生物學(xué)范文第3篇

成語是人們長期以來習(xí)用的、形式簡潔而精辟的定型的詞組或短句。不少成語都蘊(yùn)藏了豐富的生物學(xué)知識，將適當(dāng)?shù)纳锍烧Z引入課堂，不僅豐富課堂內(nèi)容，更能加深學(xué)生們對生物學(xué)知識的掌握，現(xiàn)列舉一些反應(yīng)生物種間關(guān)系的成語。

1.螟蛉有子，蜾蠃負(fù)之——捕食

該成語出自《詩經(jīng)·小雅·小宛》。螟蛉是一種綠色小昆蟲，蜾蠃是一種寄生蜂。古人誤認(rèn)為蜾蠃喂養(yǎng)螟蛉為子，常把螟蛉比喻為義子。其實(shí)不然，蜾蠃常捕螟蛉為食，并以產(chǎn)卵管刺入螟蛉體內(nèi)，注射蜂毒使其麻痹，產(chǎn)卵在它們體內(nèi)，待卵孵化后就拿螟蛉作為食物。不難看出，該成語反映的是不同生物之間的捕食現(xiàn)象。值得注意的是，蜾蠃只是螟蛉的擬寄生者，它們不是真正的寄生關(guān)系，因?yàn)檎嬲募纳呤遣灰运拗鳛槭车摹?/p>

2.螳螂捕蟬，黃雀在后——捕食和適應(yīng)的相對性

《韓詩外傳》卷十中記載：“螳螂方欲食蟬，而不知黃雀在其后，舉頸而欲啄而食之也。”螳螂全身綠色或土黃色，頭呈三角形，前腿呈鐮刀狀，活動(dòng)靈敏自如，能出其不意地捕食蟬。然而有時(shí)螳螂?yún)s顧此失彼，樂極生悲，在其身后的黃雀對之虎視眈眈，隨時(shí)可美餐一頓。螳螂依靠其身體的優(yōu)勢輕易地捕食蟬，這是生物對環(huán)境的適應(yīng)。螳螂在捕食蟬的同時(shí)，也被黃雀捕食這正是適應(yīng)相對性的最好體現(xiàn)。此外，螳螂吃蟬，黃雀捕食螳螂，這也反映生態(tài)系統(tǒng)中的各生物之間的食物關(guān)系，屬于食物鏈的一部分。

3.鵲巢鳩占——競爭

《詩經(jīng)·召南·鵲巢》有“維鵲有巢，維鳩居之”的記載，說的就是該成語的本義：喜鵲的巢被斑鳩占據(jù)了。這兩種生物相互爭奪資源和空間等的現(xiàn)象叫競爭，競爭的結(jié)果可向兩個(gè)方向發(fā)展：一種完全擠掉另一種;通過地理隔離，各占有一定的空間。鵲巢鳩占屬于競爭中的第一種情況。

4.癬疥之疾（纖芥之疾）——生物的寄生

此成語用來比喻不在意的小問題或無關(guān)緊要的小毛病。其實(shí)，從生物學(xué)的角度看，癬和疥皆為皮膚病，其對人體的危害是不可輕視的。

癬是皮膚感染霉菌后而引起的一種疾病，霉菌主要侵害皮膚、毛發(fā)和指(趾)甲。依據(jù)發(fā)病部位可分為頭癬、手癬、足癬、甲癬、體癬等。這些癬比較頑固，治療起來非常麻煩，給患者帶來很多痛苦。此外，癬還具有一定的傳染性，它可通過直接或間接接觸傳染給他人，也可在自身蔓延。

疥瘡是由疥蟲引起的傳染性皮膚病，多發(fā)生在手指間、手腕、肘窩、腋窩、腹股溝等處，呈針頭大小的水瘡和丘疹。患疥瘡的人常有劇烈的瘙癢感覺，特別在夜間更甚，搔抓后極易感染，會引起膿皰瘡、淋巴結(jié)炎等疾病。雖“癬疥之疾”，也不可輕視。

5.相依為命——生物的共生

現(xiàn)代漢語成語詞典解釋為：互相依靠著過日子，泛指互相依賴。其實(shí)，動(dòng)物和植物間也存在著這種微妙關(guān)系，生物學(xué)上稱此為共生現(xiàn)象。例如，海葵常固定在寄居蟹的外殼上，當(dāng)它靠刺細(xì)胞防御敵害時(shí)，能對寄居蟹起到間接的保護(hù)作用。而寄居蟹到處爬行，可使海葵得到更多的食物。再如，在巴西的叢林中生長著一種蟻棲樹。這種樹樹干高大，有節(jié)，葉片呈掌狀，外形像蓖麻。蟻棲樹因棲息螞蟻而得名。樹上棲息的螞蟻叫益蟻，益蟻能群起攻擊專吃樹葉的嚙葉蟻，從而保護(hù)了蟻棲樹；而蟻棲樹葉柄基部叢生細(xì)毛，細(xì)毛中常分泌含有豐富蛋白質(zhì)和脂肪的類似物質(zhì)，供益蟻食用。

生物學(xué)范文第4篇

2.Distribution and status of bustards in China

3.Genetic analysis of the br gene in halophilic archaea isolated from Xinjiang region, China

bination of ARDRA and RAPD genotyping techniques in identification of Acinetobacter spp. genomic species

5.Chemical composition and antimicrobial activity of the essential oil of Cacalia tangutica (Maxim.) Hand.-Mazz

6.Carboxymethytl pachymaram up-regulates dendritic cell function in hepatitis B virus transgenic mice

7.Technological exploration of BAC-FISH on mitotic chromosomes of maize

8.Proteomics analysis of cerebral cortex in Wistar rats

9.A simple and visualized method to screen for effective siRNAs by using green fluorescence protein (GFP) as a reporter

10.shRNA-triggered RNAi inhibits expression of NDV NP gene in chicken embryo fibroblast

11.The language of GABA in pollen tube growth and guidance

12.Analysis of quantitative trait loci underlying the traits related to chlorophyll content of the flag leaf in rice

13.Potential variability of trans-lysozyme gene rice under ecological conditions of Yunnan Province, China

14.Photosynthetic characteristics of three varieties of Lilium "Oriental Hybrids" in the central areas of Yunnan Province,China

15.Analysis of sparteines in the seeds of Ammopiptanthus mongolica

16.Response of clonal plasticity of Fargesia nitida to different canopy conditions of subalpine coniferous forest

17.Confirmation of natural hybrids between Gentiana straminea and G. siphonantha (Gentianaceae) based on molecular evidence

18.Characteristics of the Achnatherum splendens community along the Qinghai-Tibet Railway, China

19.Phenotypical and structural characterization of the Arabidopsis mutant involved in shoot apical meristem

20.Species diversity and interspecific association in development sequence of Hippophae rhamnoides plantations in the Loess Hilly Region, China

21.Estimation of fine root production, mortality and turnover with Minirhizotron in Larix gmelinii and Fraxinus mandshurica plantations

22.Quantitative analysis of endangered Acanthopanax senticosus communities in Dongling Mountain of Beijing

23.Application of self-organizing neural networks to classification of plant communities in Pangquangou Nature Reserve, North China

24.Responses of nematode communities to different land uses in an aquic brown soil

25.Seasonal variation and longitudinal distribution of copepods in the main river area of the Three Gorges Reservoir

26.Breeding ecology and oviposition site selection of black-spotted pond frogs (Rana nigromaculata) in Ningbo, China

27.Carrying capacity for shorebirds during migratory seasons at the Jiuduansha Wetland, Yangtze River Estuary, China

28.Evaluation of the eco-environmental frangibility in west Jilin Province based on the matter-element model

1.Advances in plant proteomics-key techniques of proteomeSonglin RUAN，Huasheng MA，Shiheng WANG，Ya XIN，Lihua QIAN，Jianxing TONG，Jie WANG

2.Annual plants in arid and semi-arid desert regionsXuehua LI，Xiaolan LI，Deming JIANG，Zhimin LIU，Qinghe YU

3.Simulation,construction and characterization of a multi-functional thrombolytic agent with anti-thrombosis activityWeiran YU，Jian JING

4.Nuclear transfer of goat somatic cells transgenic for human lactoferrin geneLan LI，Wei SHEN，Lingjiang MIN，Qingyu PAN，Yujiang SUN，Jixian DENG，Qingjie PAN

5.Apoptosis induced by 3,7-dinitrodibenzobromonium salts in K562 cellsRuidong MIAO，Xiaohui XIA，Dongling YANG，Minghua LU，Qin WANG

6.Cloning,sequencing and prokaryotic expression of cDNAs for antifreeze protein family from Beetle Tenebrio molitorZhongyuan LIU，Yun WANG，Guodong LU，Xianlei WANG，F(xiàn)uchun ZHANG，Ji MA

7.Cloning and expression of endo-β-glucanase Ⅱ gene in Humicola insolens H31-3Huifang TAN，Guoqing ZHANG，Guangyu ZHENG，F(xiàn)umian CUI，Shijun QIAN

8.Microbial diversity in lake sediments detected by PCR-DGGEXinqing ZHAO，Liuyan YANG，Can CHEN，Lin XIAO，Lijuan JIANG，Zhe MA，Haowei ZHU，Zhenyang YU，Daqiang YIN

9.Causal analysis of the diversity of medusae in East China SeaZhaoli XU，Mao LIN，Qian GAO

10.Habitat use of urban Tree Sparrows in the process of urbanization:Beijing as a case studyShuping ZHANG，Guangmei ZHENG，Jiliang XU

11.Pollination characteristics of the ephemeroid plant Eremurus anisopterusMiao MA，Junfeng FAN，Jing LI

12.Influence of long-term different fertilization on soil weed seed bank diversity of a paddy soil under rice/rape rotationWei FENG，Genxing PAN，Sheng QIANG，Ruhai LI，Jiguang WEI

13.Biomass structure of exotic invasive plant Galinsona parvifloraShuyan QI，Wenduo XU，Yan WEN

14.Leaf traits and their interrelationship of 23 plant species in southeast of Keerqin Sandy Lands,ChinaJinhuan LIU，Dehui ZENG，Don Koo LEE，Zhiping FAN，Lei ZHONG

15.Distribution patterns and changes of aquatic plant communities in Napahai Wetland in northwestern Yunnan Plateau,ChinaDerong XIAO，Kun TIAN，Hua YUAN，Yuming YANG，Ningyun LI，Shouguo XU

prehensive evaluation of multiple cropping systems on upland red soilGuoqin HUANG，Xiuying LIU，Longwang LIU，F(xiàn)ang YE，Mingling ZHANG，Yanhong SHU

17.Vertical characteristics of the Hani terrace paddyfield ecosystem in Yunnan,ChinaBaoshan CUI，Zheyuan YOU，Min YAO

18.Structure regulation of land use and landscape pattern changes based on matter element analysis in a small watershed in Sichuan,ChinaJunhua CHEN，Changlong MU，Xiuming CHEN，Chenghua XIANG，Chengrong LUO，Huabai NAN，Guoxian CHEN，Yanjun DU

19.Material flow analysis (MFA) of an eco-economic system:a case study of Wujin District,Changzhou,ChinaHeping HUANG，Jun BI，Xiangmei LI，Bing ZHANG，Jie YANG

1.Neutral theory in community ecologyShurong ZHOU，Dayong ZHANG

2.Molecular genetic analysis of Dongzhou-period ancient human of Helingeer in Inner Mongolia, ChinaYuqin FU，Chengzhi XIE，Han ZHAO，Xuelian XU，Yinqiu CUI，Quanchao ZHANG，Hui ZHOU，Hong ZHU

3.Subcellular localization of PS1 based on PS1/GFP fusing proteinTie LI，Jiahui LI，Lifeng NING，Jianli SANG

4.Cloning and expression of the gene encoding (R)-specific carbonyl reductase from Candida parapsilosis CCTCC M203011Na XU，Haiyan WANG，Yao NIE，Yan XU，Rong XIAO

5.Heterologous expression and characterization of man gene from Bacillus Subtilis in Pichia PastorisYu QIAO，Xiaobing CHEN，Hongbiao DING，Ming YUE

6.Physiological water strategy of Artemisia ordosica around soil threshold of droughtPingping XUE，Xingdong HE

7.Chlorophytes of biological soil crusts in Gurbantunggut Desert, Xinjiang Autonomous Region, ChinaJiancheng ZHAO，Bingchang ZHANG，Yuanming ZHANG

8.Study on successions sequence of evergreen broad-leaved forest in Gutian Mountain of Zhejiang, Eastern China:species diversityZhenghua HU，Mingjian YU

9.Effects of heavy metals Cd2+, Pb2+ and Zn2+ on DNA damage of loach Misgurnus anguillicaudatusYingmei ZHANG，Yejing WANG，Runliu YU，Sheng ZHANG，Zhenbin WU

10.Sequence variability analysis on major histocompatibility complex class Ⅱ DRB alleles in three felinesQian WANG，Xiaobing WU，Peng YAN，Shuai ZHENG

11.Effects of vegetation coverage on the spatial distribution of soil nematode trophic groupsJianfeng HUA，Yong JIANG，Wenju LIANG

12.Potential effects of elevated carbon dioxide on leaf-feeding forest insectsXiaowei WANG，Lanzhu JI，Guiqing WANG，Yan LIU

13.Selectivity mechanism of Anoplophora glabripennis on four different species of maplesFengjuan ZHANG，Youju JIN，Huajun CHEN，Xiaoying WU

14.Role of magpie in bird community formation in secondary forestQiuxiang DENG，Wei GAO，Yanlong YANG，Tong ZHOU

15.Fluctuations and patterns of desert rodent communities under human disturbance: fluctuating tendency and sensitive response of their populationXiaodong WU，Heping FU

16.A preliminary study on designing ecological corridors in Xishuangbanna National Nature Reserve with 3S techniquesLiu LIN，Li ZHANG，Limin FENG，Xianming GUO，Jianwei ZHAO，Jianhong DAO

17.Phosphatized rare star-like mouth disc of Punctatus and its functional morphology from the earliest Cambrian of the South Shaanxi ChinaYunhuan LIU，Yong LI，Tiequan SHAO，Zhixin ZHU，Wanqian ZHANG，Zhuo WANG，Weixian YANG，Rongxi LI

18.Macroalgal holdfasts and their interaction with environments from the Neoproterozoic Doushantuo Formation in Guizhou,South ChinaYue WANG，Xunlian WANG

1.Recent development of chemical components in propolisYuanjun XU，Liping LUO，Bin CHEN，Yuxin FU

2.Iron acquisition by Streptococcus species: An updated reviewRuiguang GE，Xuesong SUN，Qingyu HE

3.New concept of contaminant removal from swine wastewater by a biological treatment processMeixue CHEN，Rong QI，Wei AN，Heqing ZHANG，Yuansong WEI，Yiqi ZHOU

4.Recovering context-specific gene network modules from expression data: A brief reviewHui YU，YuanYuan LI

5.Alterations in sucrose metabolizing enzyme activities and total phenol content of Curcuma Ionga L. as affected by different triazole compoundsC. Abdul JALEEL，Changxing ZHAO，Sedghi MOHAMED，Hameed Jasim AL-JUBURI，Helal Ragab MOUSSA，M. GOMATHINAYAGAM，R. PANNEERSELVAM

6.Bacterial viability assessment by flow cytometry analysis in soilIdo SHAMIR，Eran ZAHAVY，Yosef STEINBERGER

7.Marine mycoflora of south India with special emphasis on Lignicolous Marine FungiGayatri R. NAMBIAR，K. RAVEENDRAN，Cheruth Abdul JALEEL

8.Identification of superoxide dismutase isoenzymes in tobacco pollenJing WANG，Xuequn LIU，Guanghui YU

9.Effects of low pH and aluminum stresses on common beans (Phaseolus vulgaris) differing in low-phosphorus and photoperiod responsesHai NIAN，Cunyi YANG，He HUANG，Hideaki MATSUMOTO

10.Evaluation of tobacco soil fertility suitability of the Sanmenxia area, China, based on geographic information systemsHaisheng CHEN，Yongfeng YANG，Guoshun LIU，Zhengxian TONG

11.Studies of cocoa tea, a wild tea tree containing theobromineXiaohong SONG，Xianggang SHI，Yunqin LI，Li PENG，Chengren LI，Xiaorong YANG，Chuangxing YE，Jiaxian LI，Yumei HE，Hualin HUANG，Aiqing MIAO，Chaoyi ZHAO，Jiayao WU，Caijin LIN

12.Spatial heterogeneity of available zinc, copper, and manganese in Xiangcheng Tobacco Planting Fields, Henan Province, ChinaHaisheng CHEN，Zili SHEN，Guoshun LIU，Zhengxian TONG

13.Leaf traits indicate survival strategies among 42 dominant plant species in a dry, sandy habitat, ChinaJinhuan LIU，Dehui ZENG，Zhiping FAN，David PEPPER，Guangsheng CHEN，Lei ZHONG

14.Functions of canopy-stored seeds in the dune ecosystem: conclusions from Agriophyllum squarrosum and Artemisia wudanicaZhimin LIU，Xiumei WANG

15.Regeneration pattern analysis of Quercus Iiaotungensis in a temperate forest using two-dimensional wavelet analysisXiangcheng MI，Jihua HOU

16.Structures and topographical pattern of the tree layer of Fagus engleriana-Cyclobalanopsis oxyodon community in Shennongjia area, Hubei Province, ChinaMi ZHANG，Zongqiang XIE，Gaoming XIONG，Dayong FAN

17.The Janzen-Connell effect on the population dynamics of a Fagus engleriana- Cyclobalanopsis oxyodon community in a subtropical zone of ChinaMi ZHANG，Gaoming XIONG，Zhigang CHEN，Zongqiang XIE

18.Spatial hints of forest ecotone indicating forest succession, a case of larch forests in Baihuashan Reserve, north ChinaHongxiao YANG，Jintun ZHANG，Bin XU

19.Distribution patterns of tree species in an evergreen broadleaved forest in eastern ChinaZhengrong LUO，Bingyang DING，Xiangcheng MI，Jiuhua YU，Yougui WU

20.Ethnobotanical studies of plants of Charkotli Hills, Batkhela District, Malakand, PakistanBARKATULLAH，Muhammad IBRAR，F(xiàn)arrukh HUSSAIN

21.Local perceptions of grassland change and priorities for conservation of natural resources of Banni, Gujarat, IndiaP. N. JOSHI，V. KUMAR，M. KOLADIYA，Y. S. PATEL，T. KARTHIK

22.On governance in the long-term vegetation process: How to discover the rules?László ORL(O)CI，Kate S. HE

23.Analysis of the diet of the tadpole shrimp, Triops sinensis, in paddy fields of Shouchang River watershedHuixian WU，Junzeng XUE

24.Quartered neighbor method: A new distance method for density estimationXunzhi ZHU，Jintun ZHANG

25.Effect of an integrated mangrove-aquaculture system on aquacultural healthYisheng PENG，Xulin LI，Kalan WU，Yougui PENG，Guizhu CHEN

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5.Establishing cell polarity by the Lgl family proteinsZhangchun HE，Lijuan ZHANG，Puyue WANG

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10.MicroRNA target prediction based on second-order Hidden Markov ModelSong GAO，Liangsheng ZHANG，Diangang QIN，Tienan FENG，Yifei WANG

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生物學(xué)范文第5篇

2006年10月15日在美國佐治亞州召開的美國神經(jīng)科學(xué)協(xié)會年會上，一些研究人員公布的研究結(jié)果表明，自殺的人顯示其大腦中有明顯的變化，這種變化是獨(dú)立于他們所患的其他精神疾病，也就是說自殺并非是其他精神疾病的結(jié)果，而是自身的結(jié)果。

長期以來，對自殺存在著一種解釋，認(rèn)為是其他精神病癥引起患者自殺，典型的是抑郁。比如，一些人處于抑郁狀態(tài)，然后越來越抑郁，到最后無法控制自己時(shí)，就結(jié)束自己的生命。

但是，紐約的布朗克斯退伍軍人事務(wù)醫(yī)學(xué)中心的研究人員史蒂拉?德拉切娃進(jìn)行的研究有可能改變這種抑郁誘發(fā)自殺的解釋。德拉切娃和其同事查驗(yàn)了22名自殺死亡者和82名其他原因死亡者的大腦中血清素的細(xì)胞表面受體。眾所周知，血清素與抑郁相聯(lián)。而德拉切娃等人檢測的血清素是一種獨(dú)特的5羥色胺受體形式，稱為5-HT2C，而5羥色胺受體有24種不同的類型。

德拉切娃等人發(fā)現(xiàn)，在大腦的高級功能區(qū)，如進(jìn)行思維的一個(gè)區(qū)域，自殺者的背外側(cè)前額葉區(qū)出現(xiàn)了高水平的5羥色胺受體，不論自殺者是否患其他精神疾病，還是根本就沒有精神疾病。盡管大多數(shù)自殺者也同時(shí)患有其他一些精神疾病，如雙相性疾病――抑郁或精神分裂癥，但是也有少量的自殺者僅僅只感到有壓力。

當(dāng)然，德拉切娃等人坦承尚不能確定大腦中的這種變化是自殺的誘因，抑或是自殺的結(jié)果，但他們的研究提示一些處于高危自殺的人是由于其大腦結(jié)構(gòu)或化學(xué)物質(zhì)產(chǎn)生了變化。

而紐約州立精神病學(xué)研究所的米赫蘭?巴卡里安進(jìn)行的研究卻是另一種結(jié)果。巴卡里安在自己的一項(xiàng)研究中發(fā)現(xiàn)，自殺者大腦的參與控制攻擊性和其他情緒的區(qū)域――顳葉前部的杏仁核較之其他原因死亡者有較低密度的血清素受體。對此結(jié)果，巴卡里安的解釋是，大腦中的這種差異很有可能原因在于大腦攻擊性系統(tǒng)的改變。精神病學(xué)的一些研究也發(fā)現(xiàn)，富于攻擊性與自殺相聯(lián)。這也可能是處置自己生命的人不能夠支配指向自己的攻擊性沖動(dòng)。