山东省鸟类新纪录——白喉红尾鸲、高原岩鹨

2018—2019年野外调查，记录到白喉红尾鸲和高原岩鹨。经查阅相关文献，证实两种鸟类均为山东省鸟类新纪录

长白山-贝加尔湖断面水生植物正构烷烃及其氢同位素与环境水的分馏关系

开展了自长白山至贝加尔湖空间跨度约2000 km断面上代表性地点的水生植物正构烷烃及其单体氢同位素研究.结果表明,该区域大型水生植物正构烷烃具有明显的奇偶优势,以C_(23)或C_(25)为主峰,这两个链长的正构烷烃可以作为研究区水生植物来源的普适性特征标志物.同一植物来源的不同链长正构烷烃的单体氢同位素值相近,尤其是n-C_(21), n-C_(23), n-C_(25)三者的氢同位素值相差很小.水生植物正构烷烃与环境水间的氢同位素分馏值稳定在-159&permil;左右,与欧洲等地区获得的结果有很好的一致性,表明正构烷烃单体氢同位素可以示踪水体的氢同位素组成.全球水生植物正构烷烃氢同位素数据综合分析显示,正构烷烃C_(23)和C_(25)氢同位素平均值是反演环境水体氢同位素组成的优选代用指标.本研究不仅获得了这一区域水生植物的分子标志物数据,同时对全面认识和理解正构烷烃氢同位素组成及其在古气候研究中的应用具有重要意义.</p

阵发性睡眠性血红蛋白尿症伴可逆性后部脑病综合征1例报道 Paroxysmal Nocturnal Hemoglobinuria with Posterior Reversible Encephalopathy Syndrome: A Case Report

可逆性后部脑病综合征（posterior reversible encephalopathy syndrome，PRES）是一种以可逆性神经系统损害和特异性影像学表现为主的临床-影像学综合征，阵发性睡眠性血红蛋白尿症（paroxysmal nocturnal hemoglobinuria，PNH）是临床上的罕见疾病。本文介绍1例有PNH的老年男性患者，患者长期慢性溶血性贫血，不规律服用小剂量免疫抑制剂，短期间断输入共计10 U洗涤红细胞后，出现伴有头痛、痫性发作、精神行为异常、血压异常增高及微量蛛网膜下腔出血的PRES，此病需与脑静脉及静脉窦血栓形成和可逆性脑血管收缩综合征等疾病相鉴别。本文旨在提高临床医师对此类患者的预防、早期识别及应对能力。 Abstract: Posterior reversible encephalopathy syndrome (PRES) is a clinical-imaging syndrome dominated by reversible neurological damage and specific imaging manifestations, and paroxysmal nocturnal hemoglobinuria (PNH) is a clinically rare disease. This paper described a case of an elderly male patient with PNH who had long-term chronic hemolytic anemia. After irregularly taking low-dose immunosuppressants and short-term intermittent infusion of 10 U of washed erythrocytes, he developed a PRES with headache, seizures, mental behavioural abnormalities, abnormally high blood pressure, and trace subarachnoid hemorrhage. It should be differentiated from diseases such as cerebral venous and venous sinus thrombosis and reversible cerebral vasoconstriction syndrome. The aim of this paper is to improve the clinicians’ ability to prevent and identify this type of patients at an early stage