Results 21 to 30 of about 12,534 (113)
Haiyang yu huzhao以西沪港海域养殖6个月的大黄鱼同生群幼鱼为实验对象，于自制顶流装置的集鱼区内移入体质量相近的2 500尾实验鱼后，在水平流速0.37 m/s胁迫下按持续顶流能力将其分为强、中、弱3个不同顶流等级子群(依次记为SG、MG和WG, 出现率分别为最强的5%、居中的50%和最弱的5%)。随机选取不同子群各30尾作为生物学测定对象，定量研究了三者生物学测定性状对体质量影响效果的差异。结果表明：(1) 三者在生物学表型和脏器比例性状上均具一定差异，诸性状中随顶流性能下降呈单调下降的仅为眼间距和内脏质量/体质量(P ...
邓 意俐 +5 more
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Zhejiang Daxue xuebao. Lixue ban, 2015 建立了一种通过超高效液相色谱-串联质谱法(UPLC-MS/MS)测定养殖水体中14种喹诺酮类药物的方法.水样经甲酸酸化预处理后，采用HLB固相萃取柱富集并净化目标物，以0.2%体积分数的甲酸水溶液-甲醇为流动相，经过梯度洗脱分离，串联质谱多反应监测模式测定，再由外标法定量.结果显示，14种喹诺酮药物浓度为0.5~50.0 µg • L-1时线性良好，线性相关系数大于0.995.空白水样在5.00，50.0和100 ng • L-1 3种添加水平下的加标回收率为79.8%~95.4 ...
LIPeipei(李佩佩) +6 more
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Preliminary Study on Antifatigue Activity of Enzymatic Hydrolysate of Auxistapeionosoma Bleeker from South China Sea(南海圆鮀鲣肌肉组织酶解产物抗疲劳活性的初步研究) [PDF]
Shipin kexue jishu xuebao, 2017 Auxistapeionosoma Bleeker is a kind of tuna in the South China Sea with high yield and low value. This study analyzed the proximate composition, amino acid composition of the ordinary meat and dark meat hydrolysates, and evaluated their anti-fatigue ...
ZHANG Chaohua(章超桦) +3 more
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Conservation Biology, EarlyView.Abstract Site fidelity is the tendency for animals to repeatedly return to the same locations, either within or between years. Site fidelity enables animals to utilize knowledge of previously visited locations, including assessments of seasonal variations in health and mortality risks (e.g., predation), resource availability, and social benefits such ...
Tobias A. Ross +13 more
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Haiyang yu huzhao全氟辛酸(perfluorooctanic acid, PFOA)是一种具有多系统毒性的新污染物，对双壳贝类可产生一定的免疫毒性效应，损害机体的正常免疫功能。益生菌作为一种安全无毒的食品级制剂，已被应用于水产养殖行业，用以提高水生生物的免疫防御能力。然而，益生菌对贝类中新污染物所引发的生物毒性是否有消减作用，目前尚不可知。据前期研究，新污染物PFOA在水生生物尤其贝类中存在较高的蓄积量，具有潜在的生态和健康风险。因此，探索经济贝类中益生菌对PFOA免疫毒性的消减作用具有重要意义 ...
周 扬 +6 more
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Zhejiang Daxue xuebao. Lixue ban, 2017 建立了超高效液相色谱串联质谱法测定水产品中的红霉素残留量.样品用改进的QuEChERS（快速、简单、廉价、高效、灵活和安全）进行提取净化，经乙腈快速提取，无水硫酸镁和氯化钠除水后，用N-丙基乙二胺(PSA)净化，液相色谱串联质谱分析测定.在ACQUITY UPLC BEH C18色谱柱上进行分离，采用梯度洗脱，以0.1%甲酸水溶液和甲醇为流动相，电喷雾正离子电离，多反应监测模式，内标法定量.结果表明：红霉素浓度在0.5~50 µg • L-1时具有良好的线性关系，相关系数为0.997 6，定量限为0.3
YANZhongyong(严忠雍) +7 more
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The Development and Validation of the Chinese Vocabulary Levels Test
International Journal of Applied Linguistics, EarlyView.ABSTRACT In response to the increasing need for effective Chinese vocabulary assessments, this study developed the Chinese Vocabulary Levels Test (CVLT), a test designed for intermediate‐level Chinese as a second or foreign language (CSL/FL) learners, based on the vocabulary lists (levels 4–6) from the Chinese Proficiency Grading Standards for ...
Shiwei Qi, Ailan Fu
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投喂频率对横带髭鲷
Haiyang yu huzhao为探究投喂频率对横带髭鲷幼鱼生长性能、营养成分、消化酶活性及消化系统形态结构的影响，选用初始体重为(7.13±0.93) g的活力较好幼鱼，随机分为4组，每组3个重复，每个重复20尾鱼。4个实验组的投喂频率分别是1次/d (F1)、2次/d (F2)、3次/d (F3)、4次/d (F4)，试验持续8周。结果表明，随着投喂频率增加，终末体重、增重率、特定生长率、摄食率均有所上升，但F3和F4组没有显著差异，F4组较F1组终末体重增加了8.29 g、增重率提高了63%、摄食率提高了20 ...
平 洪领 +5 more
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Zhejiang Daxue xuebao. Lixue ban, 2014 为快速、准确监测水产养殖环境水体中孔雀石绿含量，建立了一种超高效液相色谱-串联质谱法(UPLC-MS/MS)测定水产养殖水体中孔雀石绿及隐色孔雀石绿的方法.水样经甲酸酸化预处理后，采用多壁碳纳米管固相萃取柱富集和净化目标物，超高效液相色谱分离，三重四级杆质谱检测，氘代同位素内标定量.在优化条件下，孔雀石绿和隐色孔雀石绿在0. 02~10. 0 µg • L-1浓度范围内均满足线性关系，相关系数R2>0. 998，方法检出限、定量限分别为0. 000 3和0. 001 µg • L-1.在0. 005~0.
MEIGuangming(梅光明) +6 more
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Reframing Colonial Korea's Forests Through Protection Forests: The Forests of Joseon (1938)
Berichte zur Wissenschaftsgeschichte, Volume 49, Issue 3, Page 377-394, September 2026.This study examines The Forests of Joseon (1938), a forestry survey compiled by Tokumitsu Nobuyuki under Japanese colonial rule, as a key site of epistemic negotiation between imperial forestry science and Korean indigenous knowledge. Focusing on bíbo forests—geomantic forests believed to regulate energy flow between mountains and villages—the paper ...
Soyeong Park, Jeong‐Hann Pae
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