Drug toxicity in the in vitro experiments， the need for the testing of chemical substances on cell survival and multiplication effect from animal experiments can directly observe animal physiological phenomenon， in vitro experiments testing cell survival needs， and the use of cell life activities， have a material is to detect cell survival and survival The experimental use MTA France colorimetric measurement for determining the toxicity of H2O2 for Hela
Outside the body of the medicine toxicity in the experiment， need to examine the chemistry medicine to the influence of cell propagate and survival， differ from the physiology phenomenon that the animal experiment can observe the animal directly， the experiment outside the body needs to examine the cell survival rate， but make use of the cell some life movable process to examine in the output material cell whether survival and the survival This experiment makes use of the MTA method to compare the color measurement， useding for the measurement H2O2 to the toxicity of the cell of H
我给你提供一些网站吧，都不错的。_of_lifeSome individuals， including logical positivists， have asked questions like "What does the question 'What is the meaning of life?' mean?" and also questioned whether it is a meaningful Others have considered the question "If there are no objective values， then is life meaningless?" Existentialists hold that meaning can be created by oneself， rejecting the nihilist Some， notably Humanists， have aimed to develop an understanding of life that explains， regardless of how we came to be here， what we should do now that we are In addition to the naturalistic hypotheses concerning the origin of life， consciousness and the universe offered by science， some philosophers and theologians posit a "watchmaker" or "intelligent designer" as the creator of the physical universe， mainly based on teleological and/or cosmological And others have considered the human need for some higher or supernatural ideal， for instance， in reference to Friedrich Nietzsche's postulation of the "death" of God， Martin Heidegger puts the problem as "If God as the suprasensory ground and goal of all reality is dead， if the suprasensory world of the Ideas has suffered the loss of its obligatory and above it its vitalizing and upbuilding power， then nothing more remains to which man can cling and by which he can orient "Religious answers to the question "What is the meaning of (my) life?" tend to include a certain moral demand and to soothe the grief associated with Mystical and spiritual traditions focus more on direct experience than religions generally do， the overall view is that life is an unfolding， an inner-awakening or a discovery and transforming of one's understanding and insight， and the ultimate goal of life is living a life in accordance with this spiritual insight， which can be summarized as understanding the meaning of life， all of life and reality
Pick Ecological system is one of the main area ecology structural and functional unit， belong to the highest level of Life on earth is carbon chain of life， the yankees -- and artificial life is the true life forms to the lab， the development and research of ecological system simulation is actually tried to establish an artificial environment， in this environment， use the computer to ecological system， and simulation through the animal species caught between capture and the relationship between the dynamic balance system， establish， people can better understand the people around the Based on artificial life is the basic idea of the computer simulation method， and the description of the This system based on research on ecological chain， JAVA language design of real life imitating some basic characteristics， so as to realize artificial When in the process of the basic elements of artificial life after setting， procedure and cannot foresee generated in the development of artificial life， even in different conditions can produce different 希望对你有帮助
青春， 这个很好， 经典中的经典．缪尔·厄尔曼: 青春（中英对照） 塞缪尔·厄尔曼: 青春 YOUTH Samuel Ullman Youth is not a time of life; it is a state of mind; it is not a matter of rosy cheeks， red lips and supple knees; it is a matter of the will， a quality of the imagination， a vigor of the emotions; it is the freshness of the deep springs of Youth means a tempera-mental predominance of courage over timidity， of the appetite for adventure over the love of This often exists in a man of 60 more than a boy of Nobody grows old merely by a number of We grow old by deserting our Years may wrinkle the skin， but to give up enthusiasm wrinkles the Worry， fear， self-distrust bows the heart and turns the spring back to Whether 60 or 16， there is in every human being’s heart the lure of wonder， the unfailing childlike appetite of what’s next and the joy of the game of In the center of your heart and my heart there is a wireless station: so long as it receives messages of beauty， hope， cheer， courage and power from men and from the Infinite， so long are you When the aerials are down， and your spirit is covered with snows of cynicism and the ice of pessimism， then you are grown old， even at 20， but as long as your aerials are up， to catch waves of optimism， there is hope you may die young at 青春 塞缪尔·厄尔曼 青春不是年华，而是心境；青春不是桃面、丹唇、柔膝，而是深沉的意志，恢宏的想象，炙热的恋情；青春是生命的深泉在涌流。 青春气贯长虹，勇锐盖过怯弱，进取压倒苟安。如此锐气，二十后生而有之，六旬男子则更多见。年岁有加，并非垂老，理想丢弃，方堕暮年。 岁月悠悠，衰微只及肌肤；热忱抛却，颓废必致灵魂。忧烦，惶恐，丧失自信，定使心灵扭曲，意气如灰。 无论年届花甲，拟或二八芳龄，心中皆有生命之欢乐，奇迹之诱惑，孩童般天真久盛不衰。人人心中皆有一台天线，只要你从天上人间接受美好、希望、欢乐、勇气和力量的信号，你就青春永驻，风华常存。 一旦天线下降，锐气便被冰雪覆盖，玩世不恭、自暴自弃油然而生，即使年方二十，实已垂垂老矣；然则只要树起天线，捕捉乐观信号，你就有望在八十高龄告别尘寰时仍觉年轻。
