Effect of feeding calcium salts on performance of nursing Awassi ewes     

Obeidat BS  Awawdeh MS  Titi HH  AbuGhazaleh AA  Al-Lataifeh FA  Alawneh IA  Abu Ishmais MA  Qudsieh RI  Subih HS 《Tropical animal health and production》2011,43(6):1211-1217

Twenty nursing Awassi ewes (BW = 50 ± 2.35 kg, age = 4.5 ± 1.2 years) with their lambs were used to evaluate the effects of feeding calcium salts in lactation diets on performance and pre-weaning growth of their lambs. Treatments were 0% calcium salts (CON) or 5% calcium salts (FAT). At the end of the study, a digestibility experiment was performed. Milk yield was greater (P < 0.05) for ewes fed the FAT diet than the CON diet. Milk composition was similar (P > 0.05) between diets. However, milk energy value (kcal/day) tended to be greater (P = 0.07) for the FAT diet than the CON diet. Concentrations of milk C18:1c9 and C20:0 were greater (P < 0.05) in ewes fed the FAT diet than the CON diet. However, concentration of trans-10, cis-12 CLA was lower (P = 0.05) in the FAT diet than in the CON diet. No differences in feed intake and body weight change were detected between diets. Digestibility of dry matter, organic matter, crude protein, ether extract, neutral detergent fiber, and acid detergent fiber were similar (P > 0.05) for diets. For lambs, weaning weight was not affected by treatments. However, average daily gain and total gain were greater (P = 0.053) for the FAT diet than the CON diet. Results suggest that supplementing lactating ewes with calcium salts at the beginning of lactation phase improves daily milk yield of ewes and pre-weaning growth of their lambs with no major negative impact on feed intake and digestibility.  相似文献   

Aerobic biodegradation of precoagulated cheese whey wastewater     

Rivas J  Prazeres AR  Carvalho F 《Journal of agricultural and food chemistry》2011,59(6):2511-2517

Prior to the application of an aerobic biological process, cheese whey wastewater has been pretreated by means of a precipitation stage by adding either NaOH or CaOH2. Both precipitating agents reduce roughly 50% of the raw wastewater chemical oxygen demand (COD). The sludge generated in the prestage shows acceptable settling properties, although solids from the CaOH2-treated effluent are better separated from the liquid bulk than those formed in NaOH-processed wastewater. In both situations, the presedimentation stage renders a supernatant more prone to biodegradation than the untreated effluent. The previous statement is corroborated by the determination of some biological kinetic parameters. Under the operating conditions used in this work, sludge generation after the biological process is reduced to a minimum. The sludge generated shows good settling properties, especially for those experiments in which CaOH2 has previously been added.  相似文献   

Genetic diversity of immature Kemp's ridley (Lepidochelys kempii) sea turtles from the northern Gulf of Mexico     

Margaret M. Lamont  Nickolas Moreno  Fatima Yedith Camacho-Sánchez  H. Hugo Acosta-Sánchez  Scott Glaberman  Miguel Angel Reyes-Lopez  Ylenia Chiari 《水产资源保护:海洋与淡水生态系统》2021,31(10):3003-3010

1. The Kemp’s ridley (Lepidochelys kempii) is the world’s most endangered sea turtle species. Predominately nesting at only one beach in Mexico, this species declined to an estimated 300 females in the mid-1980s. Conservation efforts in the United States and Mexico, including a head start programme in southern Texas in which hatchlings were reared in captivity for several months before being released into the wild, resulted in the recovery of this species.
2. Although genetic data have previously been used to assess the success of the head start programme and dispersal of individual adults, data on immature turtles sampled at foraging areas and adult females sampled at the main nesting beach in Mexico are lacking. Genetic characterization of immature individuals is important for understanding recruitment, survival, and population demography, while genetic data on individuals from Mexico are essential for understanding dispersal and overall genetic diversity in this species.
3. To address these gaps, mitochondrial DNA data were collected from 106 immature individuals sampled at four different foraging sites in the northern Gulf of Mexico and from 18 nesting females at the primary nesting beach in Mexico.
4. Two previously unknown mitochondrial DNA haplotypes were discovered among the immature individuals.
5. Except for these two new haplotypes, the genetic diversity of immature individuals in the northern Gulf of Mexico closely corresponds to that of adults sampled in Mexico, which suggests that much of the diversity within the nesting population can be found among immature animals dispersing to foraging grounds, including locations in the northern Gulf of Mexico.
6. Continued monitoring of the genetic variation of different life stages of this species across its distribution range will help assess the success of conservation programmes by ensuring the maintenance of genetic diversity and representation of this diversity across the species’ distribution range.

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Responses of cypermethrin-induced stress in haematological parameters of Korean rockfish, Sebastes schlegeli (Hilgendorf)     

Jung-Hoon Jee  Fatima Masroor  & Ju-Chan Kang 《Aquaculture Research》2005,36(9):898-905

An increasing number of synthetic pyrethroids are used as an environmental friendly substitute of organophosphate and organochlorine insecticides. Pesticide pollution in the coastal ecosystem of Korea is considered to be a cause of slow growth and prevalence of diseases in commercial fishes. Therefore, it is necessary to develop fast techniques to detect insecticide toxicities. In the present work the results of rapid and inexpensive laboratory experiments show the patho‐physiological alteration of blood parameters to sublethal concentration of pyrethroid insecticide (cypermethrin) in the commercially important Korean rockfish (Sebastes schlegeli). Cypermethrin‐exposed fish showed erythropenia, low haematocrit and haemoglobin content and hyperglycemia, especially for long‐term exposure at high concentrations. Cypermethrin caused increased levels of serum glutamic‐acid‐oxylacetic‐acid‐transaminase, glutamic‐acid‐pyruvic‐acid‐transaminase and alkaline phosphatase, concomitant with a decreased concentration of chloride ion and blood serum osmolality, indicating the disruptive activity of cypermethrin after 8 weeks exposure. Moreover, reduced level of serum total protein, albumin, cholesterol, lysozyme activity and significantly higher level of glucose, bilirubin and malondialdehyde were measured and attributed to an increased demand for energy by fish under stress to cope with detrimental conditions imposed by chronic exposure to the toxicant.  相似文献   

Variations of chemical composition of two Algerian essential oils collected for different seasons and assessment of their insecticidal toxicity against three moth pests     

Aissaoui  Fatima  Hedjal-Chebheb  Mariam  Soltani  Abir  Haouel-Hamdi  Soumaya  Talhi  Oualid  Ziani  Borhane Eddine Chérif  Mediouni-Ben Jemâa  Jouda 《植物病害和植物保护杂志》2021,128(5):1167-1176

Journal of Plant Diseases and Protection - The aims of this work were to point out the seasonal variation in chemical composition and evaluate the insecticidal activities of Mentha spicata and...  相似文献   

Corn flour-mimosa tannin-based adhesives without formaldehyde for interior particleboard production     

Amine Moubarik  Hamid Reza Mansouri  Antonio Pizzi  Fatima Charrier  Ahmed Allal  Bertrand Charrier 《Wood Science and Technology》2013,47(4):675-683

A formaldehyde-free adhesive consisting of a corn flour/NaOH adhesive mixture and a mimosa tannin/hexamine intermediate component was developed and evaluated for application to wood panels such as particleboards. The main ingredients of this adhesive include corn flour, NaOH, mimosa tannin and hexamine. This study investigated the physical properties (rheological and thermal analysis) of corn flour/NaOH and mimosa tannin/hexamine adhesives as well as mechanical properties of particleboards produced with these adhesives. Thermomechanical (TMA) experiments indicate the best performance of the adhesives to be around the relative mass proportions of 50:50 between corn flour/NaOH and mimosa tannin/hexamine. Former NMR measurements on corn starch and mimosa tannin proved that the two components behave as a polymer blend rather than co-reacting. The laboratory results show that particleboards bonded with the adhesive at this optimal ratio show good mechanical properties. Moreover, the formaldehyde emission levels obtained from boards bonded with the optimal adhesive were considerably lower to those obtained from boards made with control urea formaldehyde.  相似文献   

Effect of Removing Seminal Plasma Using a Sperm Filter on the Viability of Refrigerated Stallion Semen     

Carlos Ramires Neto  Grabriel Augusto Monteiro  MSc  Rafaela Fatima SoaresCesar Pedrazzi  DVM  Jose Antonio Dell'aqua Jr.  Frederico Ozanan Papa  Marco Antonio Alvarenga 《Journal of Equine Veterinary Science》2013

Cooling of equine semen obtained from some stallions results in lower seminal quality and viability when the seminal plasma (SP) is present. The objective of this study was to evaluate the effect of the removal of SP using a Sperm Filter on the viability of cooled stallion semen. For this purpose, 31 stallions were used. Their ejaculates were divided into three groups: CN, semen was diluted with an extender; FLT, SP was removed by filtration; and CT, SP was removed by centrifugation and cooled to 15°C for 24 hours. Sperm kinetics and plasma membrane integrity were evaluated immediately after collection (T0) and after 24 hours of refrigeration (T1). No difference (P > .05) was noted at T1 for total sperm motility (TM), progressive sperm motility, or plasma membrane integrity when semen samples from all the stallions were analyzed. However, when samples from stallions termed “bad coolers” were analyzed (TM = <30% at T1), a difference was observed in TM and progressive sperm motility for CN compared with FLT and CT at T1. Sperm recovery was greater when SP was removed using the filter (FLT) to that when the SP was removed by centrifugation (CN) (89% vs. 81%). Thus, we concluded that filtering with a Sperm Filter is an efficient and practical method for removal of SP from stallion ejaculates, with lower sperm loss than centrifugation. We also found that the presence of SP reduces the quality and viability of cooled semen from stallions whose semen is sensitive to the process of refrigeration.  相似文献   

A Novel Halotolerant Bacterium Isolated from El Golea Lake in Algeria and Antimicrobial Potential of this Strain     

Nihel Klouche Khelil  Nadia Aissaoui  Fatima Nas  Jean Luc Cayol  Lotfi Ghellai 《农业科学与技术》2013,(10):825-834

A halotolerant, gram positive, motile and rod, was isolated from the E1 Gol6a lake of Ghardaia, Alegria and screened for its antimicrobial potential. The strain showed an inhibitory effect to gram positive and gram negative bacteria against Cladosporium spp. and a slight inhibitory effect against C. albicans using chloroform as the extraction solvent and the nutrient broth as production medium. 16S rRNA sequencing showed that the isolate named LMB3981 is a new taxon in the family of Bacillaceae （with 96% similarity）. The strain is close to Filobacillus milosensis and Bacillus haloalkaliphilum with 95% similarity. The phenotypic study showed differences between LMB3981 and two strains that are near and have confirmed the results of 16S rRNA sequencing by specific metabolic properties of the strain.  相似文献   

In situ and laboratory non-additive litter mixture effect on C dynamics of Sphagnum rubellum and Molinia caerulea litters     

Sébastien Gogo  Fatima Laggoun-Défarge  Fatima Merzouki  Stéphane Mounier  Audrey Guirimand-Dufour  Nevila Jozja  Arnaud Huguet  Frédéric Delarue  Christian Défarge 《Journal of Soils and Sediments》2016,16(1):13-27

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The Role of Biodegradable Engineered Nanofiber Scaffolds Seeded with Hair Follicle Stem Cells for Tissue Engineering     

Leila Beigom Hejazian  Banafshe Esmaeilzade  Fatima Moghanni Ghoroghi  Fatemeh Moradi  Marzieh Beigom Hejazian  Anahita Aslani  Mehrdad Bakhtiari  Masoud Soleimani  Maliheh Nobakht 《Iranian Biomedical Journal》2012,16(4):193-201

Background

The aim of this study was to fabricate the poly caprolactone (PCL) aligned nanofiber scaffold and to evaluate the survival, adhesion, proliferation, and differentiation of rat hair follicle stem cells (HFSC) in the graft material using electrospun PCL nanofiber scaffold for tissue engineering applications.

Methods

The bulge region of rat whisker was isolated and cultured in DMEM: nutrient mixture F-12 supplemented with epidermal growth factor. The morphological and biological features of cultured bulge cells were observed by light microscopy using immunocytochemistry methods. Electrospinning was used for production of PCL nanofiber scaffolds. Scanning electron microscopy (SEM), 3-(4, 5-di-methylthiazol- 2-yl)-2, 5-diphenyltetrazolium bromide (MTT) assay, and histology analysis were used to investigate the cell morphology, viability, attachment and infiltration of the HFSC on the PCL nanofiber scaffolds.

Results

The results of the MTT assay showed cell viability and cell proliferation of the HFSC on PCL nanofiber scaffolds. SEM microscopy images indicated that HFSC are attached, proliferated and spread on PCL nanofiber scaffolds. Also, immunocytochemical analysis showed cell infiltration and cell differentiation on the scaffolds.

Conclusion

The results of this study reveal that PCL nanofiber scaffolds are suitable for cell culture, proliferation, differentiation and attachment. Furthermore, HFSC are attached and proliferated on PCL nanofiber scaffolds.Key Words: Nanofiber, Electrospinning, Stem cells, Tissue engineering  相似文献