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- biofilms in natural water 自然水体生物膜
- Aeromonas hydrophila distributed widely in natural waters. 该病菌广泛地存在于自然界水体中。
- An automatic analyzer for determination of total phosphorus in natural water. 自然水样总磷含量自动分析仪的研制。
- Any of various soluble mineral salts found in natural water and arid soils. 可溶性无机盐在自然水体和干旱的土壤中所含可溶性无机盐中的一种
- The ligands are the key factor controlling the speciation of heavy metals in natural water. 水环境中广泛存在的配位体是控制重金属存在形态的关键因素之一。
- A system of Ce(SO4)2H2SO4 for determination of COD in natural water samples by reversed flow injection analysis is discussed. 研究了Ce（SO4）2?H2SO4体系反向流动注射分析法测定环境水中化学需氧量（COD）的试验条件。
- Because of contents for trace organic compounds in natural water are much fewer as NOM with fundamental on hums,ideal adsorption phenomena is exist. 考虑到天然水中实际存在的痕量有机物要比以腐殖质为主的天然有机物(NOM)的量小很多,有可能存在理想吸附现象。
- In this paper a column chromatographic preconcentration method using dithizone supported on naphthalene for copper in natural water is provided. 本文利用吸附有双硫腙的微晶萘作富集柱富集天然水中痕量铜，甲酰二甲胺洗脱，火焰原子吸收光谱法测定。
- A method of tritium measurement in natural water has b ee n developed by using electrolytic enrichment and liquid scintillation counting. 文章对在电解浓缩液闪计数法分析天然水中氚含量的复杂分析系统中,蒸馏、称重、电解、计数等每一过程中的影响因素进行了分析讨论。
- Self-purification processes of nitrogen and simultaneous nitrification and denitrification(SND) in natural water were simulated by experiment. 通过试验验证了天然水体中确实存在氮的自然净化过程和同步硝化/反硝化途径。
- A new method for the determination of trace arsenic in natural water and standard samples of sediment by HG-ICP-AES after separation/preconcentration. 采用孔雀绿与砷钼酸盐形成离子对，以聚铝作为共沉淀剂富集分离，HG-ICP-AES法测定痕量砷的新方法。
- Flow injection analysis combined with inductively coupled plasma atomic emission spectrometry was adopted for determination of calcium and magnesium in natural water. 本文采用流动注射-电感耦合等离子体发射光谱联用技术测定了天然水中的钙、镁元素。
- A new micro column preconcentration system with actived alumina being used as sorbent was developed for spectrophotometric determination of trace phosphate in natural water. 提出了以活性氧化铝微柱预富集分光光度法测定天然水体中的磷酸根。
- That country is poor in natural resources. 那个国家自然资源贫乏。
- The country is abundant in natural resources. 那个国家自然资源丰富。
- In natural talent he was their equal or superior. 在天赋方面他与他们匹敌或在他们之上。
- It is one of the strangest things in nature. 那可真是奇怪的东西之一。
- The results of colorimetric determination in natural water are equal to 81% of TOC analyzer. The trend of DOC by colorimetric determination is similar to that of TOC analyzer in soil extractant. 天然水体中水溶性有机碳比色法测定结果相当于TOC仪测定结果的81%25,而土壤溶液中有机碳比色结果的趋势与TOC仪测定结果趋势一致。
- Abstract: Calcium and magnesium in nature water are simultaneously determined by dual wave length spectrophotometry.The results are satisfactory. 文摘:本文采用双波长分光光度法使钙、镁不经掩蔽而同时测定，方法简单、准确。利用该方法对环境水样中的钙、镁进行了测定，结果令人满意。
- Hydrogen peroxide produced by biology is one of sources of H2O2 in natural waters. 过氧化氢的生物生成是天然水体中H2O2的来源之一。
