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第20章 样本采集(1 / 1)

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只见那些隶属于神秘组织的佣兵们迅速行动起来,他们的目标锁定在那些排列得井然有序的中型玻璃容器内,容器里浸泡着疑似沉睡的人头蛇身奇异生物。首先,他们细致入微地确认了生物所处的精确位置,以便选择最佳的采集点进行血液与样本的提取。经过一番周密的商议后,行动终于拉开了序幕。

佣兵们纷纷亮出各式工具,几名被选中的佣兵手持锋利的玻璃刀,对准了人头蛇身生物身上预定的采集区域所对应的玻璃壁。其中,一名经过严格训练的佣兵,以专业的手法,先在玻璃上用铅笔和标记笔精确绘制出圆孔的位置。随后,他围绕这个圆孔,小心翼翼地运用切割工具,在玻璃表层切开一条细薄而均匀的缝隙,以确保在后续开孔过程中,玻璃不会因受力不均而破裂。紧接着,他换用普通玻璃刀,在圆孔边缘反复细致地切割,直至圆孔完美成形。

在操作过程中,这名佣兵展现出了极高的专注与谨慎,而一旁协助的同伴则时刻关注着他的动作,不时提醒道:“切割时务必控制好力度,避免过猛;同时,刀片需保持垂直,不可偏离轨迹。”另一旁,一位雌雄莫辨的年轻人也轻声细语地加入提醒:“务必小心行事,这容器中的液体可能含有未知毒素,对人体有害。务必确保容器完好无损,以免液体外泄,造成不可预知的后果。”

经过一番紧张而精细的操作,那中型玻璃容器上终于出现了一个直径约15厘米的圆洞。此时,负责采集样本的佣兵迅速上前,他提着一个装满工具的箱子,从中取出采血器、消毒棉球、试管架及抗凝剂等必要物品。根据生物体型的大小,他选择了合适的采血器——可能是普通一次性采血器,也可能是更为高效的真空采血器。在正式采集前,他一丝不苟地清洁了所有采集器具,确保无菌状态,以防外界污染。

通过观察,他准确地找到了人头蛇身生物的静脉位置,并在采集前用消毒液对采集部位进行了严格的消毒处理,以降低细菌感染的风险。随后,他根据静脉的具体位置,选择了最合适的进针方式,开始采集血液。在整个采血过程中,他严格控制了采血时间和负压大小,确保血液沿着试管侧壁缓缓注入抗凝管中。采血完成后,他迅速盖紧试管帽盖,并轻轻上下颠倒试管数次,使血液与抗凝剂充分混合,随后对样品进行了编号。

采血结束后,佣兵们并未停歇,他们转而进行组织样本的采集。他们迅速取出实验所需部位的组织,利用手术剪或锋利的刀片,将其切割成不大于1立方毫米的小块,并迅速投入2.5%的戊二醛缓冲固定液中,进行固定处理。这一过程在4℃或室温下进行,持续时间不少于2小时。

固定完成后,佣兵们又进行了多次缓冲液冲洗和水洗步骤,以确保样本的纯净。随后,他们向样本中加入1%或2%的四氧化锇固定液进行后固定处理,同样在室温或4℃下静置1至3小时。之后,再次进行缓冲液冲洗,并将样本置于一系列浓度逐渐升高的酒精溶液中进行梯度脱水处理——从30%到50%,再到70%、80%、90%,直至最终的100%酒精。每一步脱水过程都持续20至30分钟,且为确保脱水彻底,100%酒精阶段被重复了2至3次。

完成这一系列复杂而精细的操作后,佣兵们又将目光投向了另一个巨大的玻璃容器——那里囚禁着《山海经》中记载的夔龙。他们如法炮制,对夔龙进行了血液和组织的采集。随后,那位雌雄莫辨的年轻人与佣兵们一同离开了这一层,顺着台阶向上攀登。然而,就在他们即将离开之际,一名佣兵突然惊呼:“那夔龙的眼睛动了!”但当他人的目光汇聚过去时,却发现夔龙依旧保持着沉睡的状态,于是纷纷断定这名佣兵定是眼花或产生了幻觉。最终,在同伴的安抚与控制下,众人继续沿着台阶向上走去,而关于夔龙是否苏醒的谜团,则暂时被留在了那片幽深的地下空间。

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