CN113559137A - 一种兽药颗粒剂的制粒方法 - Google Patents
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Abstract
本发明公开了一种兽药颗粒剂的制粒方法,步骤包括:(1)选取药材原料,除杂后用乙醇溶液浸泡,煎煮提取,过滤得滤液,回收乙醇,浓缩,得到药效溶液;(2)往药效溶液中加入占溶液重量1‑10%的铁苋菜发酵提取液以及1‑8%的海带发酵提取液,搅拌均匀得混合溶液;(3)将混合溶液浓缩至稠膏,再往稠膏中加入糊精以及柠檬酸,湿法制成软材,最后经制粒、烘干、整粒,即得兽药颗粒剂。该制粒方法采用酶解后的中药药材为主料,并加入有铁苋菜发酵提取液和海带发酵提取液作为药效补充剂,使得该兽药颗粒剂绿色、无公害,且在禽畜疾病的治疗效果以及治疗周期上得到明显改善,尤其是针对法氏囊病病毒,解毒效果突出,同时有助于促进禽畜的生长发育。
Description
技术领域
本发明涉及兽药技术领域,具体涉及一种兽药颗粒剂的制粒方法。
背景技术
随着我国家禽饲养生产集约化、规模化程度的提高,常引起各种传染病的流行,临床上尤其是细菌和病毒引起的感冒、发热、非典型性新城疫以及上呼吸道感染、法氏囊病等疾病,给养殖户带来了很大的困扰。
为了防控畜禽疾病,达到清热解毒的目的,目前使用化学药或抗生素的现象极为普遍,滥用药物、不合理配伍等也使得畜禽养殖风险日益增加,导致出现免疫抑制、繁殖障碍、低出生成活率。人们寻求开发生产绿色、无公害的添加剂,用以替代抗生素等有负面效应的兽药已迫在眉睫,而其中颗粒剂型的药物,其给药方便,只需拌入饲料中即可,十分适合作为添加剂使用。为此,我们可以通过工艺步骤的改进,研发出一款绿色、无公害的兽药颗粒剂。
发明内容
本发明的目的在于提供一种兽药颗粒剂的制粒方法,制备得到绿色、无公害的兽药颗粒剂,用以代替抗生素等有负面效应的兽药,达到清热解毒的目的。
本发明通过以下技术方案来实现上述目的:
一种兽药颗粒剂的制粒方法,步骤包括:
(1)选取药材原料,除杂后用2-5倍重量的70%-75%体积浓度的乙醇溶液浸泡12-24h,煎煮提取1-3h,过滤得滤液,回收乙醇,浓缩,得到药效溶液;
(2)往药效溶液中加入占溶液重量1-10%的铁苋菜发酵提取液以及1-8%的海带发酵提取液,搅拌均匀得混合溶液;
(3)将混合溶液浓缩至相对密度为1.32-1.42的稠膏,再往稠膏中加入占稠膏重量80-120%的糊精以及2-8%的柠檬酸,湿法制成软材,最后经制粒、烘干、整粒,即得兽药颗粒剂。
进一步改进在于,所述药材原料包括板蓝根、苦参、生地黄、金银花、车前子、防风、蚕蜕、生甘草、连翘、黄芩、黄柏、大青叶、地锦草、茵陈、栀子、苦杏仁、麻黄、荆芥、青蒿、野菊花、柴胡、赤芍中的一种或多种配伍。
进一步改进在于,所述药材原料在除杂后用复合酶进行酶解处理。
进一步改进在于,所述复合酶由纤维素酶和果胶酶组成,且其中纤维素酶的酶活为(16-22)×104U/g,果胶酶的酶活为(2-5)×104U/g。
进一步改进在于,所述铁苋菜发酵提取液通过以下步骤制得:
(1)取铁苋菜新鲜的茎,使用去离子水清洗干净,置于50-70℃温度下烘干至恒重,再切成1-10cm长的段,然后加入含有4-8wt%乙醇的水溶液,浸泡1-2h;
(2)将浸泡后的铁苋菜取出打浆,再加1-3倍质量的清水稀释,接种嗜酸乳杆菌至含量为(1.5-4)×106cfu/g,再加入占总体系0.5-0.8wt%的玉米糖浆,控制温度为40-50℃,发酵12-18h,得铁苋菜发酵液;
(3)将铁苋菜发酵液先均质,再离心取上清液,最后灭菌即得铁苋菜发酵提取液。
进一步改进在于,所述海带发酵提取液通过以下步骤制得:
(1)取新鲜海带,除杂粉碎后用含有3-5wt%乙醇、0.5-1.5wt%氯化钠、0.5-1.2wt%柠檬酸的水溶液浸泡1-2h;
(2)将浸泡后的海带取出,用流水冲洗后打浆,再加1-3倍质量的清水稀释,接种嗜酸乳杆菌至含量为(1.5-4)×106cfu/g,再加入占总体系0.5-0.8wt%的玉米糖浆,控制温度为40-50℃,发酵6-24h,得海带发酵液;
(3)将海带发酵液先均质,再离心取上清液,最后灭菌即得海带发酵提取液。
进一步改进在于,所述湿法制成软材的操作为:加入无水葡萄糖混匀,再加入聚维酮K30粉末,充分搅拌制成软材。
本发明的有益效果在于:该制粒方法采用酶解后的中药药材为主料,并加入有铁苋菜发酵提取液和海带发酵提取液作为药效补充剂,使得该兽药颗粒剂绿色、无公害,且在禽畜疾病的治疗效果以及治疗周期上得到明显改善,尤其是针对法氏囊病病毒,解毒效果突出,同时有助于促进禽畜的生长发育。
具体实施方式
下面结合实施例对本申请作进一步详细描述,有必要在此指出的是,以下具体实施方式只用于对本申请进行进一步的说明,不能理解为对本申请保护范围的限制,该领域的技术人员可以根据上述申请内容对本申请作出一些非本质的改进和调整。
各实施例中所用中药材购自安徽亳州中药材市场,所用生物酶均由诺维信(中国)生物技术有限公司生产。
实施例1
一种兽药颗粒剂的制粒方法,步骤包括:
步骤一、选取药材原料(板蓝根、金银花、大青叶,按1:1:1的重量比混合),在除杂后用复合酶进行酶解处理(45℃、pH值为5.0的条件下恒温酶解1h,再升温至70℃进行酶的灭活),复合酶由纤维素酶和果胶酶组成,且其中纤维素酶的酶活为16×104U/g,果胶酶的酶活为2×104U/g,然后用2倍重量的70%体积浓度的乙醇溶液浸泡药材原料24h,煎煮提取1h,过滤得滤液,回收乙醇,浓缩,得到药效溶液。
步骤二、往药效溶液中加入占溶液重量1%的铁苋菜发酵提取液以及8%的海带发酵提取液,搅拌均匀得混合溶液;
其中,铁苋菜发酵提取液通过以下步骤制得:
(1)取铁苋菜新鲜的茎,使用去离子水清洗干净,置于50℃温度下烘干至恒重,再切成1cm长的段,然后加入含有4wt%乙醇的水溶液,浸泡2h;
(2)将浸泡后的铁苋菜取出打浆,再加1倍质量的清水稀释,接种嗜酸乳杆菌至含量为1.5×106cfu/g,再加入占总体系0.5wt%的玉米糖浆,控制温度为40℃,发酵18h,得铁苋菜发酵液;
(3)将铁苋菜发酵液先均质,再离心取上清液,最后灭菌即得铁苋菜发酵提取液。
海带发酵提取液通过以下步骤制得:
(1)取新鲜海带,除杂粉碎后用含有3wt%乙醇、0.5wt%氯化钠、0.5wt%柠檬酸的水溶液浸泡2h;
(2)将浸泡后的海带取出,用流水冲洗后打浆,再加1倍质量的清水稀释,接种嗜酸乳杆菌至含量为1.5×106cfu/g,再加入占总体系0.5wt%的玉米糖浆,控制温度为40℃,发酵24h,得海带发酵液;
(3)将海带发酵液先均质,再离心取上清液,最后灭菌即得海带发酵提取液。
步骤三、将混合溶液浓缩至相对密度为1.32的稠膏,再往稠膏中加入占稠膏重量80%的糊精以及2%的柠檬酸,加入无水葡萄糖混匀,再加入聚维酮K30粉末,充分搅拌制成软材,最后经制粒、烘干、整粒,即得兽药颗粒剂。
实施例2
一种兽药颗粒剂的制粒方法,步骤包括:
步骤一、选取药材原料(板蓝根30wt%、生甘草30wt%、连翘20wt%、黄芪20wt%),在除杂后用复合酶进行酶解处理(45℃、pH值为5.0的条件下恒温酶解1h,再升温至70℃进行酶的灭活),复合酶由纤维素酶和果胶酶组成,且其中纤维素酶的酶活为18×104U/g,果胶酶的酶活为3.5×104U/g,然后用3.5倍重量的72%体积浓度的乙醇溶液浸泡药材原料18h,煎煮提取2h,过滤得滤液,回收乙醇,浓缩,得到药效溶液。
步骤二、往药效溶液中加入占溶液重量5%的铁苋菜发酵提取液以及4%的海带发酵提取液,搅拌均匀得混合溶液;
其中,铁苋菜发酵提取液通过以下步骤制得:
(1)取铁苋菜新鲜的茎,使用去离子水清洗干净,置于60℃温度下烘干至恒重,再切成5cm长的段,然后加入含有6wt%乙醇的水溶液,浸泡1.5h;
(2)将浸泡后的铁苋菜取出打浆,再加2倍质量的清水稀释,接种嗜酸乳杆菌至含量为3×106cfu/g,再加入占总体系0.6wt%的玉米糖浆,控制温度为45℃,发酵15h,得铁苋菜发酵液;
(3)将铁苋菜发酵液先均质,再离心取上清液,最后灭菌即得铁苋菜发酵提取液。
海带发酵提取液通过以下步骤制得:
(1)取新鲜海带,除杂粉碎后用含有4wt%乙醇、1.0wt%氯化钠、0.8wt%柠檬酸的水溶液浸泡1.5h;
(2)将浸泡后的海带取出,用流水冲洗后打浆,再加2倍质量的清水稀释,接种嗜酸乳杆菌至含量为2.5×106cfu/g,再加入占总体系0.6wt%的玉米糖浆,控制温度为45℃,发酵16h,得海带发酵液;
(3)将海带发酵液先均质,再离心取上清液,最后灭菌即得海带发酵提取液。
步骤三、将混合溶液浓缩至相对密度为1.37的稠膏,再往稠膏中加入占稠膏重量100%的糊精以及5%的柠檬酸,加入无水葡萄糖混匀,再加入聚维酮K30粉末,充分搅拌制成软材,最后经制粒、烘干、整粒,即得兽药颗粒剂。
实施例3
一种兽药颗粒剂的制粒方法,步骤包括:
步骤一、选取药材原料(金银花40wt%、生甘草40wt%、大青叶20wt%、野菊花20wt%),在除杂后用复合酶进行酶解处理(45℃、pH值为5.0的条件下恒温酶解1h,再升温至70℃进行酶的灭活),复合酶由纤维素酶和果胶酶组成,且其中纤维素酶的酶活为22×104U/g,果胶酶的酶活为5×104U/g,然后用5倍重量的75%体积浓度的乙醇溶液浸泡药材原料12h,煎煮提取3h,过滤得滤液,回收乙醇,浓缩,得到药效溶液。
步骤二、往药效溶液中加入占溶液重量10%的铁苋菜发酵提取液以及1%的海带发酵提取液,搅拌均匀得混合溶液;
其中,铁苋菜发酵提取液通过以下步骤制得:
(1)取铁苋菜新鲜的茎,使用去离子水清洗干净,置于70℃温度下烘干至恒重,再切成10cm长的段,然后加入含有8wt%乙醇的水溶液,浸泡1h;
(2)将浸泡后的铁苋菜取出打浆,再加3倍质量的清水稀释,接种嗜酸乳杆菌至含量为4×106cfu/g,再加入占总体系0.8wt%的玉米糖浆,控制温度为50℃,发酵12h,得铁苋菜发酵液;
(3)将铁苋菜发酵液先均质,再离心取上清液,最后灭菌即得铁苋菜发酵提取液。
海带发酵提取液通过以下步骤制得:
(1)取新鲜海带,除杂粉碎后用含有5wt%乙醇、1.5wt%氯化钠、1.2wt%柠檬酸的水溶液浸泡1h;
(2)将浸泡后的海带取出,用流水冲洗后打浆,再加3倍质量的清水稀释,接种嗜酸乳杆菌至含量为4×106cfu/g,再加入占总体系0.8wt%的玉米糖浆,控制温度为50℃,发酵6h,得海带发酵液;
(3)将海带发酵液先均质,再离心取上清液,最后灭菌即得海带发酵提取液。
步骤三、将混合溶液浓缩至相对密度为1.42的稠膏,再往稠膏中加入占稠膏重量120%的糊精以及8%的柠檬酸,加入无水葡萄糖混匀,再加入聚维酮K30粉末,充分搅拌制成软材,最后经制粒、烘干、整粒,即得兽药颗粒剂。
对比例1
一种兽药颗粒剂的制粒方法,其步骤与实施例2基本相同,唯一区别在于:步骤二中,往药效溶液中加入占溶液重量9%的铁苋菜发酵提取液,搅拌均匀得混合溶液。
对比例2
一种兽药颗粒剂的制粒方法,其步骤与实施例2基本相同,唯一区别在于:步骤二中,往药效溶液中加入占溶液重量9%的海带发酵提取液,搅拌均匀得混合溶液。
一、性状分析
取实施例2制得的兽药颗粒剂样品,从外观表现、硬度和入水崩解结果来评价其性状如下表:
可以看出,该兽药颗粒剂制粒效果较好,硬度适中,稀释溶解速度较快,便于药效作用的发挥。
二、药毒性试验
取实施例2制得的兽药颗粒剂样品,对其进行急性和长期毒性试验如下:
(1)急性毒性试验
将兽药颗粒剂磨粉制浆后进行小鼠灌胃给药急性毒性试验,因限于药物浓度和给药量无法增加,未能测出灌胃给药的半数致死量LD50,测得小鼠最大耐受量为240g药物/kg体重,相当于合理给药日用量(3g药物/kg体重)的80倍。给药14天后仍健康活泼,无一死亡,14天尸检未见内脏器官有异常改变,说明该兽药颗粒剂动物急性给药安全。
(2)长期毒性试验
将兽药颗粒剂磨粉制浆后进行小鼠灌胃给药3周,日用量为5g药物/kg体重,停药2周,均未见明显的毒性反应。一般情况和行为表现均无异常变化;大鼠的体重及生长情况良好,未见明显异常情况发生;血液学、血液生化学、主要脏器器官系数等指标测定,与正常对照组比较无显著性变化;系统尸检和病理组织学检查未见明显病理性损害。说明该将兽药颗粒剂动物长期给药安全。
三、药效试验
(1)试验对象:250只10日龄健康的海兰蛋鸡(购自湛江市晋盛牧业科技有限公司)。喂养20日,期间饲料为不含任何抗菌药物的全价雏鸡料,自由饮水、采食,20日后进入试验,期间不用任何菌苗、疫苗及药物。
(2)试验过程:将250只雏鸡随机分为空白组(不接种毒株,不使用药物);阳性组(接种毒株,不使用药物);给药组A(接种毒株,用实施例2制得的药物进行给药);给药组B(接种毒株,用对比例1制得的药物进行给药);给药组C(接种毒株,用对比例2制得的药物进行给药),共5组,每组50只。
其中,在接种毒株时,均用传染性法氏囊病毒毒株(毒号:BC-6/85,购自中国兽药监察所)按0.5ml/羽(空白组除外)接种,接种方式为滴鼻、点眼、经口内服同时进行,并在接种前称重。所有接种的蛋鸡在24h后,陆续出现精神萎靡,不愿走动,伏地昏睡,采食量下降、排泄白色和水样稀粪等症状,说明接种均成功。给药方式均为拌入饲料,按每只5g添加,集中饲喂,一日2次,连用5天。
(3)试验结果:对各组蛋鸡进行检测,包括:
①死亡率:在试验期间,鸡只出现法氏囊病的典型症状并死亡,尸体剖检有典型特征性病变,确定死亡数,根据每组死亡数计算死亡率。
②有效率:在试验期间,临床症状明显好转,采食、饮水基本正常,粪便基本正常;剖检有少量尿酸盐沉着,法氏囊大小、色泽基本正常均判定为有效,据此计算有效率。
③治愈率:在试验期间,用药后鸡只精神活泼,采食、饮水正常,羽毛有光泽,粪便正常;剖检无尿酸盐沉着,法氏囊大小、色泽正常均判定为治愈,据此计算治愈率。
④增重率:根据开始时及试验结束时每只蛋鸡体重,计算每只蛋鸡的增重率,以空白组为基准,计算每组试验鸡的平均相对增重率。所有结果统计得到下表:
从上表可以看出,本发明制得的兽药颗粒剂(给药组A),其针对法氏囊病的治疗有效率达到100%,治愈率达到94%,死亡率为0,且增重率基本接近健康蛋鸡,效果显著。而通过对比给药组B和给药组C可以看出,仅采用铁苋菜发酵提取液和海带发酵提取液中的一种药效补充剂时,药效一般,与本发明方案差异明显。
以上所述实施例仅表达了本发明的几种实施方式,其描述较为具体和详细,但并不能因此而理解为对本发明专利范围的限制。应当指出的是,对于本领域的普通技术人员来说,在不脱离本发明构思的前提下,还可以做出若干变形和改进,这些都属于本发明的保护范围。
Claims (7)
1.一种兽药颗粒剂的制粒方法,其特征在于,步骤包括:
(1)选取药材原料,除杂后用2-5倍重量的70%-75%体积浓度的乙醇溶液浸泡12-24h,煎煮提取1-3h,过滤得滤液,回收乙醇,浓缩,得到药效溶液;
(2)往药效溶液中加入占溶液重量1-10%的铁苋菜发酵提取液以及1-8%的海带发酵提取液,搅拌均匀得混合溶液;
(3)将混合溶液浓缩至相对密度为1.32-1.42的稠膏,再往稠膏中加入占稠膏重量80-120%的糊精以及2-8%的柠檬酸,湿法制成软材,最后经制粒、烘干、整粒,即得兽药颗粒剂。
2.根据权利要求1所述的一种兽药颗粒剂的制粒方法,其特征在于,所述药材原料包括板蓝根、苦参、生地黄、金银花、车前子、防风、蚕蜕、生甘草、连翘、黄芩、黄柏、大青叶、地锦草、茵陈、栀子、苦杏仁、麻黄、荆芥、青蒿、野菊花、柴胡、赤芍中的一种或多种配伍。
3.根据权利要求1所述的一种兽药颗粒剂的制粒方法,其特征在于,所述药材原料在除杂后用复合酶进行酶解处理。
4.根据权利要求3所述的一种兽药颗粒剂的制粒方法,其特征在于,所述复合酶由纤维素酶和果胶酶组成,且其中纤维素酶的酶活为(16-22)×104U/g,果胶酶的酶活为(2-5)×104U/g。
5.根据权利要求1所述的一种兽药颗粒剂的制粒方法,其特征在于,所述铁苋菜发酵提取液通过以下步骤制得:
(1)取铁苋菜新鲜的茎,使用去离子水清洗干净,置于50-70℃温度下烘干至恒重,再切成1-10cm长的段,然后加入含有4-8wt%乙醇的水溶液,浸泡1-2h;
(2)将浸泡后的铁苋菜取出打浆,再加1-3倍质量的清水稀释,接种嗜酸乳杆菌至含量为(1.5-4)×106cfu/g,再加入占总体系0.5-0.8wt%的玉米糖浆,控制温度为40-50℃,发酵12-18h,得铁苋菜发酵液;
(3)将铁苋菜发酵液先均质,再离心取上清液,最后灭菌即得铁苋菜发酵提取液。
6.根据权利要求1所述的一种兽药颗粒剂的制粒方法,其特征在于,所述海带发酵提取液通过以下步骤制得:
(1)取新鲜海带,除杂粉碎后用含有3-5wt%乙醇、0.5-1.5wt%氯化钠、0.5-1.2wt%柠檬酸的水溶液浸泡1-2h;
(2)将浸泡后的海带取出,用流水冲洗后打浆,再加1-3倍质量的清水稀释,接种嗜酸乳杆菌至含量为(1.5-4)×106cfu/g,再加入占总体系0.5-0.8wt%的玉米糖浆,控制温度为40-50℃,发酵6-24h,得海带发酵液;
(3)将海带发酵液先均质,再离心取上清液,最后灭菌即得海带发酵提取液。
7.根据权利要求1所述的一种兽药颗粒剂的制粒方法,其特征在于,所述湿法制成软材的操作为:加入无水葡萄糖混匀,再加入聚维酮K30粉末,充分搅拌制成软材。
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