picogram

简明释义

英[ˈpiːkəʊˌɡræm]美[ˈpaɪkəˌɡræm]

n. 微微克，沙克

英英释义

单词用法

同义词

反义词

例句

1.Objective To develop a high sensitivity and reproducible method for rapid DNA analysis even when using picogram sample in a complex background.

目的建立一种灵敏度高、重现性好的检测混合样品中微量目的基因的方法。

2.Objective To develop a high sensitivity and reproducible method for rapid DNA analysis even when using picogram sample in a complex background.

目的建立一种灵敏度高、重现性好的检测混合样品中微量目的基因的方法。

3.In this experiment, we measured the concentration of the drug in picograms per milliliter.

在这个实验中，我们测量了药物的浓度，单位为每毫升皮克克拉姆。

4.The detection limit for this assay is one picogram of the substance.

该检测的最低限度为一种物质的一个皮克克拉姆。

5.The weight of a single grain of salt is about 100,000 picograms.

一颗盐粒的重量大约是100,000皮克克拉姆。

6.Research shows that certain pollutants can be harmful even at picogram levels.

研究表明，某些污染物即使在皮克克拉姆级别也可能有害。

7.A single human hair can weigh around 1,000 picograms.

一根人类头发的重量大约是1,000皮克克拉姆。

作文

In the realm of scientific measurements, precision is paramount. One such unit that epitomizes this precision is the picogram, which is a metric unit of mass equal to one trillionth of a gram. To put it into perspective, a picogram is represented as 10^-12 grams. This minuscule measurement is often used in fields such as chemistry, biology, and environmental science where understanding the minute quantities of substances can be crucial. For instance, when studying the effects of pollutants on human health, researchers might measure the concentration of harmful chemicals in the air or water in picograms per liter. The significance of the picogram extends beyond mere numbers. It highlights the advancements in technology that allow scientists to detect and quantify substances at incredibly low levels. Modern analytical techniques, such as mass spectrometry, have made it possible to identify compounds in samples containing just a few picograms of material. This capability has profound implications for various industries, including pharmaceuticals, where drug dosages must be calculated with extreme accuracy to ensure safety and efficacy.Moreover, the use of picograms is not limited to laboratory settings. In the world of nutrition, for example, the presence of certain vitamins and minerals in food can also be quantified in picograms. Understanding these amounts can help individuals make informed dietary choices, particularly when it comes to micronutrients that are essential for health but needed in very small quantities.Another fascinating application of picograms is in forensic science. Investigators often rely on the detection of trace evidence, which can include substances like hair, fibers, or gunshot residue. The ability to analyze samples at the picogram level can mean the difference between solving a case or leaving it unsolved. Forensic scientists meticulously collect and analyze these tiny quantities to build a comprehensive picture of events surrounding a crime.As we delve deeper into the microscopic world, the relevance of picograms becomes increasingly apparent. It serves as a reminder of the complexity of our environment and the intricate balance of chemical interactions that occur all around us. By appreciating the significance of such a small unit of measurement, we can better understand the vastness of scientific inquiry and the meticulous nature of research that seeks to unravel the mysteries of life.In conclusion, the picogram is more than just a unit of measurement; it represents the cutting-edge of scientific exploration and the quest for knowledge. Its applications span across various domains, from environmental studies to healthcare and forensic science. As we continue to push the boundaries of what we know, the picogram will undoubtedly play a critical role in our understanding of the world at its most fundamental level.

在科学测量的领域中，精确性至关重要。一个典型体现这种精确性的单位是皮克克拉姆，它是一个质量的公制单位，相当于一克的万亿分之一。为了更好地理解，皮克克拉姆表示为10^-12克。这种微小的测量通常用于化学、生物学和环境科学等领域，在这些领域中，理解物质的微小数量至关重要。例如，在研究污染物对人类健康的影响时，研究人员可能会以每升皮克克拉姆来测量空气或水中有害化学物质的浓度。皮克克拉姆的意义不仅仅体现在数字上。它突显了技术的进步，使科学家能够在极低水平上检测和量化物质。现代分析技术，如质谱法，使得在仅含有几皮克克拉姆材料的样本中识别化合物成为可能。这种能力对各个行业都有深远的影响，包括制药行业，在这里，药物剂量必须极其准确地计算，以确保安全和有效性。此外，皮克克拉姆的使用并不仅限于实验室环境。在营养学领域，例如，某些维生素和矿物质在食物中的存在也可以用皮克克拉姆来量化。理解这些量可以帮助个人做出明智的饮食选择，特别是在涉及到对健康至关重要但需要极少量的微量营养素时。另一个有趣的皮克克拉姆应用是在法医学中。调查人员通常依靠痕迹证据的检测，这可能包括物质如头发、纤维或枪击残留物。能够在皮克克拉姆水平分析样本可能意味着解决案件与否之间的差异。法医科学家仔细收集和分析这些微小数量，以构建围绕犯罪事件的全面图景。随着我们深入微观世界，皮克克拉姆的相关性变得越来越明显。它提醒我们周围环境的复杂性以及发生的化学相互作用的微妙平衡。通过欣赏这样一个小单位的意义，我们可以更好地理解科学探索的广度和寻求揭示生命之谜的研究的细致性质。总之，皮克克拉姆不仅仅是一个测量单位；它代表着科学探索的前沿和知识追求。它的应用跨越多个领域，从环境研究到医疗保健和法医学。随着我们不断拓展知识的边界，皮克克拉姆无疑将在我们对世界最基本层面的理解中发挥关键作用。