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New Recording of Lactic Acid Bacteria Strains from the Contents of Adult Chicken Intestines 成年鸡肠内容物中乳酸菌菌株的新记录
Q4 Agricultural and Biological Sciences Pub Date : 2022-10-15 DOI: 10.37077/25200860.2022.35.2.14
A. Al-Salhi, S. Al-Shatty, Eman A. Al-Imara, Qutiba J. Al-Khfaji
The study was conducted in the Microbiology Laboratory of the Department of Food Science at Basrah University's, Faculty of Agriculture from 15/11/2020 to 26/12/2020, to study the flora of lactic acid bacteria in digestive parts )Jejunum, Ileum, and Ceca (for healthy adult chickens and identifying the target part that contains the largest number of lactic acid bacteria for different types of poultry. As a result, as well as isolating bacterial colonies after three times, and being genetically Identified with PCR, seven new species of lactic acid bacteria were acquired and registered at the National Center for Biotechnology Information (NCBI) as new local strains, both in Iraq and around the world, as follows: Lactobacillus gasseri strain Al-Salhi-1, Lactobacillus helveticus strain Al-Salhi-2, Lactiplantibacillus plantarum strain Al-Salhi-3, Limosilactobacillus reuteri strain AhQuSa-1, Limosilactobacillus sp. strain AhQuSa-2, Ligilactobacillus salivarius strain AhQuSa-3, Lactobacillus Johnsonii strain AhQuSa-4. The results also showed a significant superiority (P≤0.05) in the logarithmic numbers of lactic acid bacteria in the jejunum for each of : the group of birds bred in local environments, as well as in the group of birds bred in commercial fields in comparison with the Ileum and Ceca, as the bacterial content was in the group of local birds : 6.52, 5.21, 4.15 (Cfu/g) for each of the jejunum, ileum and Ceca, respectively, while in the group of commercial birds it reached: 6.35, 5.02, 3.92 (Cfu/g) for each of the jejunum, ileum and Ceca, respectively.
本研究于2020年11月15日至12月26日在巴士拉大学农学院食品科学系微生物学实验室进行,对健康成年鸡的消化部位空肠、回肠和盲肠的乳酸菌菌群进行了研究,并确定了不同类型家禽中乳酸菌含量最多的目标部位。结果,除了经过三次分离细菌菌落和用聚合酶链反应进行遗传鉴定外,还获得了7种新的乳酸菌,并在伊拉克和世界各地的国家生物技术信息中心(NCBI)登记为新的当地菌株,如下:干酪乳杆菌Al-Salhi-1、helveticus Lactobacillus Al-Salhi-2、plantitibacillus Al-Salhi-3、Limosilactobacillus reuteri菌株AhQuSa-1、Limosilactobacillus s.p .菌株AhQuSa-2、Limosilactobacillus salivarius菌株AhQuSa-3、Lactobacillus Johnsonii菌株AhQuSa-4。结果也显示出明显优势(P≤0.05)对数的乳酸菌数量为每个:空肠的鸟类繁殖在当地环境中,以及在群鸟类饲养在商业领域与回肠和盲肠相比,随着细菌群当地鸟类内容:6.52,5.21,4.15 (Cfu / g)为每个空肠、回肠和盲肠,分别在集团商业鸟到达:空肠、回肠、盲肠分别为6.35、5.02、3.92 (Cfu/g)。
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引用次数: 0
Identification of some Fourth Instar Larvae of the Mosquito (Diptera, Culicidae) using Scanning Electron Microscope (SEM) in Basrah Province, Iraq 伊拉克巴士拉省部分蚊类(双翅目,库蚊科)4龄幼虫的扫描电镜鉴定
Q4 Agricultural and Biological Sciences Pub Date : 2022-10-15 DOI: 10.37077/25200860.2022.35.2.12
Wurood H. Abed, D. Kareem
The study was conducted to determine the distinguishing characteristics of the fourth-instar larvae that used to identify the six species of mosquitoes (Diptera: Culicidae) in Basrah Province. Some morphological characteristics, pectin teeth, comb scales, lateral palatine brush filaments, and microspine patterns on the siphon were studied by using the scanning electron microscopy technique. The results showed that there are morphological differences in these micro-structures between the species, Aedes caspius (Pallas, 1771), Culex pipines (Linnaeus, 1758), Culex pusillus Macquart, 1850, Culex tritaeniorhynchus  Giles,1901, Culiseta longiareolata (Mecquart, 1838) and Uranotaenia unguiculata Edwards, 1913.
本研究旨在确定巴士拉省6种蚊(双翅目:库蚊科)的4龄幼虫的特征。利用扫描电镜技术对虹吸管的一些形态特征、果胶齿、梳状鳞片、侧腭刷丝和微棘纹进行了研究。结果表明,海纹伊蚊(Pallas, 1771年)、管纹库蚊(Linnaeus, 1758年)、粗纹库蚊(pusillus Macquart, 1850年)、三带喙库蚊(Giles,1901年)、长纹库蚊(Mecquart, 1838年)和有钩乌带蚊(unanotaenia unguiculata Edwards, 1913年)在这些微观结构上存在形态差异。
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引用次数: 0
Effect of Adding Different Concentrations of Cowpea Vigna unguiculata (L.) on Physicochemical and Sensory Properties of Chicken Mortadella 添加不同浓度豇豆对肉鸡莫拉台拉理化及感官特性的影响
Q4 Agricultural and Biological Sciences Pub Date : 2022-10-15 DOI: 10.37077/25200860.2022.35.2.15
Khalid H. Abdel Hassan, M. Eskander, Hassan H. M. Al-Rubai’y
Four chicken mortadella were prepared: C (control), M1, M2 and M3 by addition of 10%, 15%, and 20% of minced cowpea, respectively). The effect of adding minced cowpea on the physical, chemical, microbial, and sensory evaluation of mortadella had been studied. Results revealed that there were significant differences in fat, carbohydrates, and ash percentages in the mortadella. The fat percentage was gradually decreased from 15.13 % in the control group to 11.03 % in M3. Carbohydrate and ash were increased from 3.94, 2.53 % in the control group to 7.14, and 2.76 % in M3 respectively according to the increase of cowpea in the mortadella. Protein and moisture were increased with no significant difference in all mortadella examined. Water holding capacity was increased significantly by adding minced cowpea. Microbial load test revealed that there was an obvious decrease in total bacterial count and Escherichia coli with an increase of cowpea in the mortadella. For sensory evaluation there were significant differences in some characteristics between control and other groups, colour, flavour, and taste decreased according to the increase of cowpea in the mortadella formulations, the decrease was high in the M3 group and low in M1 and M2 groups with some similarity to the control group. The texture was improved by adding more minced cowpea to the   mortadella particularly in the M3 group. Accordingly, the effect of these quality properties was reflected in the degree of general acceptance of the mortadella formulations.
制备4种鸡肉摩泰台拉:C(对照)、M1、M2和M3(分别添加10%、15%和20%的豇豆末)。研究了豆瓣酱的添加对摩台ella的物理、化学、微生物和感官评价的影响。结果显示,在脂肪、碳水化合物和灰分的百分比在摩泰台拉有显著差异。脂肪率由对照组的15.13%逐渐降低至M3组的11.03%。随着豆瓣含量的增加,M3组碳水化合物和灰分含量分别从对照组的3.94%、2.53%增加到7.14%、2.76%。蛋白质和水分的增加在所有的摩泰台拉中没有显著的差异。添加豇豆末可显著提高其持水能力。微生物负荷试验结果表明,随着豇豆含量的增加,摩台菌中细菌总数和大肠杆菌数量明显减少。在感官评价方面,对照组与其他组在某些性状上存在显著差异,色、味、味均随豆豆添加量的增加而降低,M3组降低幅度较大,M1和M2组降低幅度较小,与对照组相似。特别是M3组,加入更多的豇豆末可以改善摩泰台拉的质地。因此,这些质量特性的影响反映在摩泰台拉配方的普遍接受程度上。
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引用次数: 0
Effect of Sowing Dates and Compound Fertilizer NPK on Growth and Yield of Flax (Linum usitatissimum L.) 播期和氮磷钾对亚麻生长和产量的影响
Q4 Agricultural and Biological Sciences Pub Date : 2022-10-15 DOI: 10.37077/25200860.2022.35.2.13
Rayan F. A. Al-Obady, A. Shaker
Two field experiments were conducted during winter growing season 2019-2020 at Ninevah Governorate at two locations: Talkief and Al-Hamdaniya. The main objective was to study the effect of two sowing dates (November 2017 and December 2017), and four levels of N15P15K15 fertilizers (0, 100, 150 and 200 kg. ha-1) on growth and yield of flax under rainfed conditions. The factorial experiment was carried out in Randomized Complete Block Design (R.C.B.D.) with triplicate. The results showed that there were significant differences (p<0.05) between sowing dates in all the studied characters in the both locations, the date of sowing (November 17) gave the highest rate of plant height, number of fruiting branches. plant-1, number of capsules. plant-1, number of seeds. capsule-1, 1000 seed weight , seed yield, seed oil percentage and linolenic acid percentage. Adding NPK fertilizer with 200 Kg NPK.ha-1 to the soil was superior in some characters i.e. plant height, number of fruiting branches. plant-1, number of capsules. plant-1 and number of seeds. capsule-1 in Al-Hamdaniya location, Whereas linolenic acid percentage was superior in Talkief location, Also highest seeds oil percentage was obtained in both locations. The interaction between date (November 17) with 200 kg.ha-1 of N15P15K15 fertilizer was significantly (p<0.05) superior in linolenic acid percentage in Talkief location only.
2019-2020年冬季生长季,在尼尼微省Talkief和Al-Hamdaniya两个地点进行了两项田间试验。主要目的是研究两个播种日期(2017年11月和2017年12月)和4个水平N15P15K15肥料(0、100、150和200 kg)的效果。Ha-1)对雨养条件下亚麻生长和产量的影响。本试验采用随机完全区组设计(rcbd),共3个重复。结果表明:两个地点的各性状在播期之间均存在显著差异(p<0.05),其中播期(11月17日)的株高率、结果枝数最高;植物-1,胶囊数。Plant-1,种子数。胶囊-1,1000粒种子重,种子产量,籽油百分比和亚麻酸百分比。施氮磷钾200公斤。Ha-1对土壤在株高、结果枝数等性状上均有优势。植物-1,胶囊数。植株-1和种子数量。Al-Hamdaniya地区亚麻酸含量最高,Talkief地区籽油含量最高。交互日期(11月17日)为200公斤。仅Talkief地,N15P15K15肥ha-1的亚麻酸百分比显著(p<0.05)优于N15P15K15肥。
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引用次数: 0
Using Toxic Equivalent Quotients (TEQs) to Evaluate the Risk of Polycyclic Aromatic Hydrocarbons Compounds in Soil at Basrah Governorate, Iraq 用毒性当量商数(TEQs)评价伊拉克巴士拉省土壤中多环芳烃化合物的危险性
Q4 Agricultural and Biological Sciences Pub Date : 2022-10-14 DOI: 10.37077/25200860.2022.35.2.11
Fadya M. Saleem, H. Al-Saad, M. M. Al-Hejuje
The concentrations of PAHs compounds in this study were estimated in soil of different land uses at Basrah governorate including thirty stations distributed in eight locations (five residential areas, four oil areas, four agricultural areas, five public streets, four petrol stations, two power plants, two public parks and four near private electrical generators). The levels of PAHs compounds mean in all locations ranged from (34.2 - 382.5) ng g-1 dry weight. The means of carcinogenic PAHs compounds in study area varied from (66.4 - 688.8) ng g-1 dry weight and mean of non-carcinogenic PAHs compounds varied from (12.8 - 292.5) ng g-1 dry weight. The carcinogenic PAHs compounds are more dominant than non-carcinogenic PAHs compounds. The human health risk was assessed depending on toxic equivalent quotients (TEQs). The results showed that TEQs ranged from (77.98 - 951.10) ng g-1 dry weight. The TEQs of PAHs in soil samples of oil areas showed the highest level. In general all locations in Basrah governorate were much polluted with PAHs compounds due to urban and industrial development. The present study represents the first study to assess a human health risk due to exposure to PAHs compounds in soil along Basrah governorate.
本研究对巴士拉省分布在8个地点(5个居民区、4个油区、4个农业区、5个公共街道、4个加油站、2个发电厂、2个公园和4个私人发电机附近)的30个不同土地用途土壤中的多环芳烃化合物浓度进行了估计。所有地点的多环芳烃平均含量在(34.2 - 382.5)ng g-1干重之间。研究区致癌性多环芳烃的平均值为(66.4 ~ 688.8)ng g-1干重,非致癌性多环芳烃的平均值为(12.8 ~ 292.5)ng g-1干重。致癌性多环芳烃化合物比非致癌性多环芳烃化合物占主导地位。根据毒性当量商数(TEQs)对人类健康风险进行了评估。结果表明,其teq范围为(77.98 ~ 951.10)ng g-1干重。油区土壤样品中多环芳烃的TEQs最高。总体而言,由于城市和工业发展,巴士拉省所有地点都受到多环芳烃化合物的严重污染。本研究是评估因接触巴士拉省沿岸土壤中的多环芳烃化合物而造成的人类健康风险的第一项研究。
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引用次数: 1
The Effect of Aqueous and Alcoholic Extract of Asparagus (Asparagus officinalis L.) Roots on the inhibition of some Bacteria and Fungi 芦笋水提液和醇提液的作用研究根对某些细菌和真菌的抑制作用
Q4 Agricultural and Biological Sciences Pub Date : 2022-10-13 DOI: 10.37077/25200860.2022.35.2.09
Rabia J. Abbas, Rasool A.A. Al-Subaihawi
This study aimed to investigate the inhibitory leverage of the aqueous and alcoholic extracts from Asparagus (Asparagus officinalis L.) root as in inhibiting inhibit the growth of the pathogenic bacterium, and fungus in vitro study. Concentrations of 50, 100, and 150 mg.ml-1  were used as aqueous extract  and alcohol extract  of Asparagus root  against selected organisms, which tested using a drilling method, adding a 0.2 ml aqueous extract and alcohol extract  of Asparagus root in every per well. Also 0.2 ml of distilled water and methanol alcoholic add as control and tetracycline as an antibiotic. GC/MS test results showed that the Asparagus root extract (ARE) contains various major phytochemical compounds such as flavonoids, phenols, alkaloids, glycosides, steroid, resin, saponins, and tannins. Also, it was observed that the alcoholic ARE had a higher inhibitory effect than aqueous ARE of Escherichia coli and Staphylococcus aureus. The highest diameter of inhibition at alcoholic extract concentrations of 50, 100 and 150 (mg.ml-1) were 28, 32, 35, and 26, 31, 35 mm respectively for aqueous ARE, compared to other concentrations. Whereas the effect of the aqueous extract was higher for the Pseudomonas 17, 25 and 34 mm compared to other concentrations, except for the antibiotic, which obtained the highest value (41mm). Aqueous extract concentrations 50, 100 and 150 mg.ml-1 showed higher efficiency than alcohol extract, antibiotic and control; when used against the fungus Aspergillus niger, and pathogenic yeast Candida albicans, the retarding diameters were 14, 17 and 23, and 11, 13 and 15 mm, respectively.
本研究旨在探讨芦笋根水提物和醇提物对病原菌和真菌生长的抑制作用。浓度分别为50,100和150mg。用ml-1作为芦笋根水提物和醇提物对选定的生物进行作用,采用钻孔法进行试验,每孔加入0.2 ml芦笋根水提物和醇提物。也加入0.2毫升蒸馏水和甲醇酒精作为对照,四环素作为抗生素。GC/MS测试结果表明,芦笋根提取物(ARE)含有黄酮类、酚类、生物碱、苷类、类固醇、树脂、皂苷和单宁等多种主要植物化学成分。此外,还观察到酒精型ARE对大肠杆菌和金黄色葡萄球菌的抑制作用高于水相ARE。与其他浓度相比,乙醇提取物浓度为50、100和150 (mg.ml-1)时,水相ARE的最大抑制直径分别为28、32、35和26、31、35 mm。而水提物对假单胞菌17、25和34 mm的效果均高于其他浓度,但抗生素的效果最高(41mm)。水萃取物浓度50,100和150mg。Ml-1的效率高于醇提物、抗生素和对照;对黑曲霉和白色念珠菌的阻滞直径分别为14、17和23 mm, 11、13和15 mm。
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引用次数: 0
Antibacterial and Anticancer Effects of Silver Nanoparticles Synthesised using Eragrostis tef and Vitellaria paradoxa Seeds Extract 以山苔草和牛粪籽提取物合成的纳米银的抗菌和抗癌作用
Q4 Agricultural and Biological Sciences Pub Date : 2022-10-13 DOI: 10.37077/25200860.2022.35.2.10
Suha M. A. Almudhafar, Maytham A. Al-Hamdani
The present study aims to investigate the biosynthesis of silver nanoparticles using the aqueous extract of the Eragrostis tef (teff or annual bunch grass) and Vitellaria paradoxa (Shea Butter Tree) seeds extract and investigate their antimicrobial and anticancer activities. In order to synthesise the silver nanoparticles, aqueous extract of the plant was prepared and introduced into a 1mM silver nitrate solution. The synthesised AgNPs were characterised using various instrumental techniques including ultraviolet-visible spectroscopy, Fourier transformed infrared spectroscopy (FTIR), scanning electron microscope (SEM). Surface Plasmon Resonance (SPR) for AgNPs using E. tef and V. paradoxa seeds extract was observed at 40 nm. The synthesised AgNPs of E. tef and V. paradoxa was found with diameter of 12.59- 34.60 nm, 29.05- 83.94 nm respectively. The antibacterial result against the experimental pathogens was found to range from 12-22 mm and from 13-19 mm using AgNPs of E. tef, V. paradoxa seed extracts respectively. In addition the result show that there was clear effect on Acinetobacter baumannii from hospital sewage isolates. Toxic effect of AgNPs against cancer cell were 77.12 (concentration of AgNPs was 75%) of E. tef and 77.23 (concentration of AgNPs was 50%) of V. paradoxa.
本研究旨在研究tef(一年生束草)和Vitellaria paradoxa(乳木果树)种子水提物的生物合成纳米银,并研究其抗菌和抗癌活性。为了合成纳米银,制备了植物的水提取物,并将其引入1mM的硝酸银溶液中。利用紫外可见光谱、傅里叶变换红外光谱(FTIR)、扫描电子显微镜(SEM)等多种仪器技术对合成的AgNPs进行了表征。在40 nm处观察了tef和v种子提取物对AgNPs的表面等离子体共振(SPR)。所合成的AgNPs直径分别为12.59 ~ 34.60 nm和29.05 ~ 83.94 nm。对实验病原菌的抑菌效果分别为12 ~ 22 mm和13 ~ 19 mm。结果表明,对医院污水中分离的鲍曼不动杆菌有明显的抑制作用。AgNPs对癌细胞的毒性作用分别为e.t tef的77.12 (AgNPs浓度为75%)和V. paradoxa的77.23 (AgNPs浓度为50%)。
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引用次数: 0
Comparison of Different Coefficients ‎to Know the Kinetic Behaviour of Glyphosate ‎in Soil Column 不同系数对草甘膦在土柱中动力学行为的比较
Q4 Agricultural and Biological Sciences Pub Date : 2022-09-06 DOI: 10.37077/25200860.2022.35.2.08
Alaa H. Al-Farttoosy, Jenan N. Al Sadoon
The movement of pesticides in the soil has a significant effect, causing the failure of pest control, and environmental contamination. The results of this study were to investigate the environmental behaviour of glyphosate in the soil column. The data’s kinetic reaction was confirmed that glyphosate is subjected to Pseudo-first order rather than Pseudo-second order with the rate constant 0.042 h-1. This indicated that decreasing glyphosate concentrations can occur and gradually decline with time. The data also pointed out that glyphosate was more fitted to Freundlich compared to the Langmuir model. It scored 3.083 to 1.814, indicating the behaviour of glyphosate occurred in the various surfaces. The contribution coefficient of glyphosate between the soil and its solution Kd valued 0.33 mL. g-1, explaining that the herbicide is less mobile and tends to adsorb on soil particles. Overall data demonstrated that the kinetics of glyphosate under this current condition tends to be immobile.
农药在土壤中的运动有显著的影响,造成病虫害防治的失败,和环境污染。本研究的结果是探讨草甘膦在土壤柱中的环境行为。数据的动力学反应证实草甘膦是伪一级反应而不是伪二级反应,速率常数为0.042 h-1。这表明草甘膦浓度会随着时间的推移而下降并逐渐下降。数据还指出,与Langmuir模型相比,草甘膦更适合Freundlich模型。它的得分为3.083 ~ 1.814,表明草甘膦的行为发生在不同的表面。土壤与草甘膦溶液之间的贡献系数Kd值为0.33 mL. g-1,说明草甘膦的流动性较差,容易吸附在土壤颗粒上。总体数据表明,草甘膦在这种当前条件下的动力学倾向于不动。
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引用次数: 2
Effect of Dietary Supplements Farmatan TM and Pine Tree Energy on the Regulation of Ruminal Digestion and Microbiocenosis of Lactating Black and White Cows 饲粮添加法马丹TM和松树能对泌乳黑、白奶牛瘤胃消化和微生物病的调节作用
Q4 Agricultural and Biological Sciences Pub Date : 2022-09-05 DOI: 10.37077/25200860.2022.35.2.07
V. Zaitsev, N. Bogolyubova, Lilia M. Zaitseva, Irina S. Emelyanova, V. P. Korotkiy, V. A. Ryzhov
The study aimed to evaluate the effect of dietary supplements on ruminal digestion and intestinal microbiocenosis of lactating cows. The study was carried out under production conditions on three groups of new black-and-white heifers (10 heads each). Mean live weight of cows was 500±20 kg. The cows of the control group received a basic diet, which included haylage of perennial grasses, corn silage, legume hay, concentrate feed, and molasses. Cows of the experimental groups, in addition to the basal diet (BD), received the Farmatan TM supplement (consists of a balanced combination of tannins, essential oils of clove and cinnamon, sodium acetate, and organic zinc) at a dose of 40 g. head-1 per day (experimental group 1) and a pine tree energy supplement at a dose of 150 g. head-1 per day (experimental group 2). The supplement was mixed with concentrate feed and given once in the morning feeding. In the course of the study, the parameters of ruminal fermentation in experimental animals and the microorganisms of the rumen and the large intestine were studied. At the same time, it was found that the inclusion of the Farmatan TM feed additive (40 g per day) and pine tree energy supplement (150 g per day) in the diet of cows at the beginning of lactation contributed to the strengthening of enzymatic processes in the rumen, which was expressed in an increase in the formation of volatile fatty acids by 7.6 and 20.3%, an increase in the proportion of propionic acid and a slight decrease in the proportion of acetic and butyric acids. When using feed additives (Farmatan TM and pine tree energy supplement), a decrease in the content of Clostridium in the rumen of cows was noted by 26.3 and 30.3% in the 1st and 2nd experimental groups, respectively, compared with the control group. In cows of the experimental groups, a decrease in the content of molds and yeast-like fungi in the rumen was also noted. The results obtained allow recommending the studied additives (Farmatan TM and pine tree energy supplement) to enhance enzymatic processes in the rumen.
本试验旨在评价饲粮添加物对泌乳奶牛瘤胃消化和肠道微生物病的影响。该研究在生产条件下对三组新出生的黑白小母牛(每组10头)进行。奶牛平均活重500±20 kg。对照组饲喂多年生牧草、玉米青贮、豆科牧草、精料、糖蜜等基础饲粮。试验组奶牛在基础饲粮(BD)的基础上,分别饲喂40 g. head-1 / d(试验1组)和150 g. head-1 / d(试验2组)的法玛坦TM(由单宁、丁香和肉桂精油、乙酸钠和有机锌均衡组合而成)补品。补品与精料混合,在晨饲中饲喂1次。在研究过程中,对实验动物瘤胃发酵参数及瘤胃和大肠微生物进行了研究。同时,发现Farmatan TM的夹杂物饲料添加剂(每天40克)和松树能源补充(每天150克)的饮食牛初哺乳导致瘤胃酶过程的加强,这是表达的挥发性脂肪酸的形成增加了7.6和20.3%,丙酸的比例的增加和醋酸的比例略有下降,奶油的酸。在添加饲料添加剂(法玛坦TM和松树能量补充剂)的情况下,1、2试验组奶牛瘤胃中梭状芽孢杆菌含量分别较对照组降低26.3%和30.3%。在试验组奶牛中,瘤胃中霉菌和酵母样真菌含量也有所下降。所得结果可推荐所研究的添加剂(法玛坦TM和松树能量补充剂)来促进瘤胃酶促过程。
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引用次数: 0
Isolation and Partial Characterization of Glycolipopeptide Biosurfactant Derived from A Novel Lactiplantibacillus plantarum Lbp_WAM 新型植物乳杆菌Lbp_WAM糖多糖肽生物表面活性剂的分离及部分表征
Q4 Agricultural and Biological Sciences Pub Date : 2022-09-03 DOI: 10.37077/25200860.2022.35.2.06
A. Al-Seraih, W. A. Swadi, M. Al-hejjaj, Fatima H. Al-Laibai, A. Ghadban
Biosurfactants are amphipathic molecules generated by a variety of microorganisms with different biological functions. In this study, lactic acid bacteria were screened for their emulsification properties. However, the Lactiplantibacillus plantarum strain LBpWAM was molecularly identified using 16S rRNA, and its ability to produce surface-active peptides was investigated. The biosurfactant derived from L. plantarum LBp_WAM was shown to have the potential to reduce water surface tension from 72 mN.m-1 to 32 mN/m within a critical micelle concentration (CMC) of 2.4 mg.ml-1. The emulsification index (E24) values were evaluated for sunflower oil (60 ± 3.0%), glycerol (53.9 ± 0.11 %), olive oil (49.0 ± 2.0 %), mineral oil (50.7 ± 0.60 %), hexane (36.03±0.05 %), and kerosene (31 ±0.05 %). The biosurfactant was purified using gel filtration chromatography (GFC), and the molecular weight was determined using the SDS-PAGE method, indicating an approximate molecular weight of 19 kDa. Thin-layer chromatography (TLC) and Fourier transform infrared spectroscopy (FT-IR) were used to determine the molecular structure of the obtained molecule, which was found to be composed of protein, lipid, and polysaccharides. The biosurfactant's antibacterial activity was also examined, as it showed inhibitory effects against different species of Gram-positive and Gram-negative bacteria.
生物表面活性剂是由多种具有不同生物功能的微生物产生的两亲性分子。本研究对乳酸菌的乳化特性进行了筛选。然而,利用16S rRNA对植物乳杆菌菌株LBpWAM进行了分子鉴定,并对其产生表面活性肽的能力进行了研究。从植物L. plantarum中提取的生物表面活性剂LBp_WAM具有降低72 mN水表面张力的潜力。临界胶束浓度(CMC)为2.4 mg.ml-1。分别对葵花籽油(60±3.0%)、甘油(53.9±0.11%)、橄榄油(49.0±2.0%)、矿物油(50.7±0.60%)、己烷(36.03±0.05%)、煤油(31±0.05%)的乳化指数(E24)进行评价。采用凝胶过滤层析(GFC)纯化该生物表面活性剂,采用SDS-PAGE法测定其分子量,分子量约为19 kDa。利用薄层色谱(TLC)和傅里叶变换红外光谱(FT-IR)对所得分子的分子结构进行了分析,发现所得分子由蛋白质、脂质和多糖组成。该生物表面活性剂对不同种类的革兰氏阳性和革兰氏阴性细菌均有抑菌作用。
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引用次数: 0
期刊
Basrah Journal of Agricultural Sciences
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