5 天之前 · The National Toxicology Program provides the scientific basis for programs, activities, and policies that promote health or lead to the prevention of disease. Founded in 1978, NTP plays a critical role in generating, interpreting, and sharing toxicological information about potentially hazardous substances in our environment.

In chemistry, IUPAC changed its definition of standard temperature and pressure in 1982: [1] [2] Until 1982, STP was defined as a temperature of 273.15 K (0 °C, 32 °F) and an absolute pressure of exactly 1 atm (101.325 kPa ).

ChemNTP 集成了化学结构和生物靶标的全面表示，改进了仅限于单个靶标和机制的传统方法。 通过利用这些结构表示，ChemNTP 能够快速筛选 199 个潜在的神经毒性靶点或关键分子起始事件 （MIE）。 该模型展示了稳健的预测性能，在测试集上实现了 0.923 的受试者工作特征曲线下面积 （AUCROC）。 此外，ChemNTP 的注意力机制突出了结合靶标中的关键残基和分子中的关键官能团或原子，从而深入了解相互作用的结构基础。 通过体外酶活性测定和分子对接进行的实 …

STP - Standard Temperature and Pressure - is defined by IUPAC (International Union of Pure and Applied Chemistry) as air at 0 o C (273.15 K, 32 o F) and 10 5 pascals (1 bar). STP - commonly used in the Imperial and USA system of units - as air at 60 o F (520 o R, 15.6 o C) and 14.696 psia (1 atm, 1.01325 bara)

2025年3月19日 · NTP evaluates substances and circumstances for a variety of cancer and noncancer health-related effects, usually (but not always) using rodent models. Listed below are the most widely used NTP test methods and protocols. ... Learn about chemical disposition and toxicokinetic studies.

2024年12月10日 · NTP makes a wide variety of data and resources available to researchers and the general public. This page includes a link to NTP study data (Chemical Effects in Biological Systems), as well as various resources devoted to pathology and test-method development.

2024年5月15日 · NTP and STP are two terms which are widely used in physics and chemistry to explain the various physical and chemical properties of liquids and gases. Let’s learn about these and their difference in detail.

Standard temperature and pressure, or STP, are the reference conditions used in chemistry to compare gas properties. The reason for having standard conditions is that they conveniently allow consistent measurements of gas properties like mass and volume.

2025年1月10日 · The NTP technical reports provide the long-term NTP toxicology and carcinogenicity studies that usually involve exposing laboratory animals (rats and mice) to a substance for a period of two years. These studies are designed and conducted to characterize and evaluate the toxicologic potential, including carcinogenic activity, of selected ...

美国国家毒理学计划（ntp）成立于1978年，目标是以识别潜在的危险物质并评估其对人类健康的影响。 NTP项目的科学数据、报告和专著可在NTP网站上免费获得，并被医学和科学界、卫生研究和监管机构、记者和媒体专业人士以及公众广泛使用。