The answer to this riddle lies in the metabolic activity of early photosynthetic life-forms that slowly but surely transformed the chemical composition of Earth's atmosphere.
这个谜题的答案在于早期光合生命形式的新陈代谢活动，这种活动缓慢但一定改变了地球大气的化学成分。
Paraspeckles are dynamic structures that are altered in response to changes in cellular metabolic activity.
旁斑是响应细胞代谢活性变化而改变的动态结构。
MPS stimulates the metabolic activity of human dermal fibrocytes.
MPS刺激了人类皮肤纤维细胞的代谢活动。
RAZ: And so, during that period of time, in theory, a human being would experience no metabolic activity.
拉兹：所以，在那段时间里，理论上病人将经历一个没有代谢活动的时期。
As a micronutrient, boron is of important role in the structure, function and metabolic activity of plant cell.
硼作为植物的必需微量营养元素，在植物的细胞结构、功能和代谢活动中具有极其重要的作用。
Then they underwent PET scans and ct scans to measure the location and metabolic activity of brown fat deposits.
然后，他们进行PET扫描和CT扫描去测量棕色脂肪的位置和代谢活动后的剩余量。
Lignolytic degradation with fungi is a secondary metabolic activity, and in contrast to bacteria, it happens in primary metabolism.
腐霉的降解作用发生在次级代谢阶段，而细菌发生在初级代谢阶段。
The calculated data of thesaccharide metabolic activity retention of baker's yeast using the new model accorded with the experimental data.
面包酵母的糖代谢活力保留值的实验测定值与模型计算值相符，进一步验证了微生物活力保留值模型的正确性。
The cell metabolic activity observed on hydrophobic PCL films is superior and cell adhesion level on hydrophilic chitosan films is excellent.
细胞在壳聚糖膜上具有较好的伸展形态，在聚己内酯膜上具有较高的增殖活性。
These observations suggested that the growth of extraradical hyphae and metabolic activity of the AM fungi was regulated by the P status of the host plant.
宿主植物磷营养状况较好时，菌根真菌生长和代谢活性受到抑制，表明宿主植物的磷营养状况对AM真菌的生长和代谢活性具有调控作用。
Phospholipids is the basic composition of membrane material, its synthesis and metabolic activity not only play an important physiological role in the cells.
磷脂作为生物膜的基本组成物质，其合成和代谢不仅在细胞生理活动中发挥重要的角色。
Objective To investigated the effects of different holding temperature on the metabolic activity, ultrastructure and patency of cryopreserved allograft arteries.
目的探讨不同维持温度对冷冻保存异体动脉内皮细胞代谢活性、超微结构和移植通畅率的影响。
It is not only the major site of metabolic activity but it is also the largest protein reservoir, and playing a central role in nitrogen flow during some disease states.
骨骼肌不仅是代谢主要的器官，同时也是最大的蛋白储存库，此外，骨骼肌在某些病理情况下的氮平衡中扮演着核心的角色。
The most sensitive imaging modality for early detection of HO is three-phase bone scintigraphy which can also monitor the metabolic activity and degree of maturity of HO.
三相核素骨扫描是早期检测异位骨化的最敏感指标，并可以判断病变的活动性和成熟度。
RESULTS AND CONCLUSION: The topography, hydrophilicity, protein adsorption and cell metabolic activity of films are largely related to the mass ratio of chitosan and PCL.
结果与结论：膜的表面形貌、亲疏水性、蛋白吸附和细胞增殖活性在很大程度上取决于壳聚糖和聚己内酯的质量配比。
Serum morphogenesis and resorption markers' concentrations change in course of ra indicating the decrease in bone metabolic activity with the disease duration and progression.
在ra病程中，血清的形态学和再吸收标志物浓度的改变指示出随着疾病的进程，骨代谢活力降低。
Alkaline ph dramatically increased intracellular protein tyrosine phosphorylation, metabolic activity, and albumin accumulation in the cells, while acidic ph caused apoptosis.
碱性PH会显著性提高细胞内蛋白酪氨酸磷酸化、代谢活性以及细胞中的白蛋白聚集，而酸性PH则会导致细胞调亡。
Endoreduplication has been observed in many plant and animal species, and is documented toappear more frequently in tissues with high metabolic activity and highly differentiated cells.
核内再复制现象普遍存在于动物和植物中，在高代谢活性组织的细胞及最终进行高度分化的细胞中最常见。
This metabolic cost may arise from the muscular and neural activity involved in singing or from behaviors associated with singing.
这种代谢消耗可能是由于唱歌或与唱歌相关的行为中涉及的肌肉和神经活动所产生的。
The latest study shows that the metabolic changes resulting from weight loss are mirrored in altered brain activity.
最新研究显示，减肥带来的这一新陈代谢变化也反映在大脑活动的变化上。
We live with the rhythms of our own heartbeat and respiration and the more subtle rhythms of metabolic and brain wave activity.
在我们生命的过程中，我们在体验着自身心跳与呼吸的节奏，甚至新陈代谢与脑电波活动等更细微的律动。
Metabolic disorder of Hevea leaves was characterized by a decrease in the activity of NAD—malate dehydrogenase and in the content of soluble protein.
叶片代谢失调表现为参与多种代谢反应的苹果酸脱氢酶活性下降，生活的基本物质——水溶性蛋白质含量下降。
Objective: We aimed to assess whether altered HPA axis activity was associated with features of the metabolic syndrome and ischemic heart disease in people with type 2 diabetes.
目的：本研究目的是评价HPA轴的活性改变是否与2型糖尿病患者代谢综合征的组分和缺血性心脏病相关。
The female hormone of soybean isoflavones is affecting on hormone secretion, metabolic biology activity, protein synthesis, growth factors activity, is the natural cancer chemoprevention agent.
大豆异黄酮的雌性激素作用影响到激素分泌、代谢生物学活性、蛋白质合成、生长因子活性、是天然的癌症化学预防剂。
Everyone knows that exercise comes with metabolic and cardiovascular benefits, but scientists understand surprisingly little about how physical activity influences the heart itself.
大家知道运动对代谢和心血管有益，但是令人吃惊的是科学家对运动如何影响心脏知之甚少。
Objective: To investigate the effect of metabolic acidosis on carbonic anhydrase (ca) activity in rat erythrocytes.
目的：探讨代谢性酸中毒对大鼠红细胞碳酸酐酶(ca)活性的影响。
To evaluate the activity of CYP450 in different groups, the metabolic rate of cocktail probe drugs was determined by HPLC.
通过高效液相色谱法检测探针药物的代谢率，评价各组CYP450酶的活性水平。
To evaluate the activity of CYP450 in different groups, the metabolic rate of cocktail probe drugs was determined by HPLC.
通过高效液相色谱法检测探针药物的代谢率，评价各组CYP450酶的活性水平。
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