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| Registros recuperados: 148.874 | |
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| Abdalla,Fábio C.; Cruz-Landim,Carminda da; Gracioli,Luciana F.. |
| In the eusocial worker bees, portions of the epithelium of the abdominal epidermis may become hypertrophied and glandular, and produce the wax used to build the brood alveoli. In meliponine bees, the presence of similar epithelium was already observed in the queens, but its function is still unknown. Would this epithelium have homologous function in the workers? May the queens display other functions, besides reproduction, related to those considered exclusive of workers? In order to contribute to solve these questions, a histological and ultrastructural study of the tegumentary epithelial glands of the third tergite was carried out in virgins and physogastric queens of Scaptotrigona postica Latreille. The glandular tegumentary epithelium was easily... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Wax; Meliponine; Histology; Microscopy. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2005000100006 |
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| Abdalla,Fábio C; Sampaio,Guilherme; Pedrosa,Marina; Sipriano,Thamiris P; Domingues,Caio Eduardo C; Silva-Zacarin,Elaine Cristina M; Camargo,Daiane A. de. |
| Larval development of Physocephala (Diptera, Conopidae) in the bumble bee Bombus morio (Hymenoptera, Apidae). In the summer of 2012, a high incidence of conopid larvae was observed in a sample of female B. morio collected in remaining fragments of semidecidual forest and Cerrado, in the municipality of Sorocaba, state of São Paulo, Brazil. The larval development of conopid flies was studied, beginning at the larval instars (LO to L3) and PUP, until the emergence of the imago under laboratory conditions and inside the host. At the first instar, or LO, the microtype larvae measured less than 1 mm in length. During the transition from L1 to L3, the larvae grew in length. At L3, the larvae doubled their length (4 mm) and then started to develop both in length... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Conopidae; Insecta; Larva; Parasitism; Physocephala. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262014000400007 |
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| Abdalla,Fábio Camargo. |
| Morphological, chemical and developmental aspects of the Dufour gland in some eusocial bees (Hymenoptera, Apidae): a review. The present revision focused on the more recent data about the Dufour gland in some eusocial bees, taking in account general aspects of its morphology, secretion chemical nature, bio-synthetic pathway and development. Many functions have been attributed to this gland in eusocial bees, but none are convincing. With the new data about this gland, not only the secretion chemical pathway of the Dufour gland may be reasonable understood, as its function in some eusocial bees, especially Apis mellifera Linné, 1758, which has been extensively studied in the last years. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Exocrine glands; Meliponines; Pheromone. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262006000200002 |
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| Abdalla,Fábio Camargo; Cruz-Landim,Carminda da. |
| The Dufour gland is found closely associated with the sting apparatus of all hymenopteran females, playing multiple roles among bees. In Apis mellifera Linnaeus, 1758 the gland is connected to the dorsal vaginal wall and, in queens, it produces egg-marking pheromones. In workers the function of this gland is unknown, except by its capacity to mimic the queen secretion in egg-laying workers. In an attempt to understand the development and to substantiate the present knowledge about the Dufour gland in A. mellifera, a morphometric study of the gland between and within the female castes was made. Glands of workers and queens with different ages and life stages were dissected and measured with an ocular micrometer adapted to a stereoscope. The results showed... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Apis mellifera; Dufour gland; Exocrine glands. |
| Ano: 2001 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752001000500009 |
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| Abdallah, Vanessa Doro; UFRRJ; Azevedo, Rodney Kozlowiski de; UFRRJ; Luque, José Luis; UFRJ. |
| Foram estudados 100 tamboatás Hoplosternum littorale (Hancock, 1828) provenientes do rio Guandu, coletados próximo à barragem da Estação de tratamento de água (ETA) (22°48’32”S, 43º37’35”O), no Estado do Rio de Janeiro, no período de maio de 2004 à fevereiro de 2005. Oito espécies de metazoários parasitos foram coletadas e identificadas. O digenético Kalipharynx sp. foi a espécie mais prevalente (61%), seguido pelo hirudíneo Glossiphoniidae gen. sp. (20%) e a metacercária progenética de Herpetodiplostomum caimancola (Dollfus, 1935) (11%). Nenhum parasito apresentou correlação significativa entre o comprimento total do corpo do hospedeiro e sua abundância. O sexo dos hospedeiros influenciou a abundância de Kalipharynx sp., sendo os machos os mais... |
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Palavras-chave: 2.13.00.00-3 Parasitologia Hoplosternum littorale; Tamboatá; Rio Guandu; Parasitos; Brasil. |
| Ano: 2007 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/407 |
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| Abdallah, Vanessa Doro; Universidade Federal Rural do Rio de Janeiro; Azevedo, Rodney Kozlowiski de; Universidade Federal Rural do Rio de Janeiro; Luque, José Luis Fernando; Universidade Federal Rural do Rio de Janeiro. |
| Current essay describes three new Monogenean species, namely, Cosmetocleithrum striatuli sp. nov., Jainus leporini sp. nov. and Rhabdosynochus guanduensis sp. nov., parasites on the gills of Trachelyopterus striatulus (Steindachner, 1877), Leporinus copelandii Steindachner, 1875 and Centropomus undecimalis (Bloch, 1792), respectively. Fish were collected from the Guandu river, State of Rio de Janeiro, Brazil between August 2005 and November 2008. Cosmetocleithrum striatuli sp. nov. differs from all other congeneric species by the shape of an accessory piece (more robust and resembling a crustacean claw or chela) and by the shape of its ventral and dorsal bars (not V-shaped and with expanded lateral ends directed to the rear). Jainus leporini sp. nov.... |
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Palavras-chave: 2.03.00.00-0 Centropomus undecimalis; Cosmetocleithrum striatuli sp. nov.; Jainus leporini sp. nov.; Rhabdosynochus guanduensis sp. nov.; Trachelyopterus striatulus; Leporinus copelandii 2.13.00.00-3. |
| Ano: 2012 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/10466 |
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| Abdallah,K.A.; Jorgetti,V.; Pereira,R.C.; dos Reis,L.M.; Pereira,L.M.; Corrêa,P.H.S.; Borelli,A.; Ianhez,L.E.; Moysés,R.M.A.; David-Neto,E.. |
| Low bone remodeling and relatively low serum parathyroid hormone (PTH) levels characterize adynamic bone disease (ABD). The impact of renal transplantation (RT) on the course of ABD is unknown. We studied prospectively 13 patients with biopsy-proven ABD after RT. Bone histomorphometry and bone mineral density (BMD) measurements were performed in the 1st and 12th months after RT. Serum PTH, 25-hydroxyvitamin D, 1,25-dihydroxyvitamin D, and osteocalcin were measured regularly throughout the study. Serum PTH levels were slightly elevated at transplantation, normalized at the end of the third month and remained stable thereafter. Bone biopsies performed in the first month after RT revealed low bone turnover in all patients, with positive bone aluminum staining... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Adynamic bone disease; Aluminum bone disease; Bone biopsy; Parathormone; Renal osteodystrophy; Renal transplantation. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2006000100004 |
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| Abdallah,N; Abdel Aziz,HK; Hamed,NA; Gamal,M. |
| Hepatitis C virus (HCV) patients commonly have low platelet counts; however, the exact role of HCV infection in thrombocytopenia is unknown. This work aimed to study the serum levels of interleukins (IL) 10 and 12 in patients with mild and moderate thrombocytopenia associated with chronic hepatitis C infection. Our study included 15 patients with chronic HCV infection and newly diagnosed isolated autoimmune thrombocytopenia (Group I) and 15 patients with chronic HCV infection and normal platelet count as controls (Group II). All patients were examined for personal history and clinical aspects, complete blood count, bone marrow aspiration, liver function tests, HCV antibody assay by ELISA and polymerase chain reaction (PCR), abdominal ultrasound,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Interleukin-10; Interleukin-12; Thrombocytopenia; Hepatitis C activity. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992010000300012 |
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| Abdallah,N; Morsi,M; Hamed,N; Abdel Aziz,H. |
| The most reliable determination of severity and prognosis in chronic viral hepatitis is the histological staging of the disease, which comprises an invasive procedure and is often not well accepted by patients. The search for alternative non-invasive methods is mandatory especially in follow-ups after initial assessment by biopsy. The aim of this study was to evaluate the role of vascular cell adhesion molecule-1 (VCAM-1) and intercellular adhesion molecule-1 (ICAM-1) in patients under interferon alpha therapy whether responsive or non-responsive to therapy. Thirty chronic hepatitis C patients (CHC) under combined therapy of interferon-α with ribavirin, whether responsive or non-responsive, were included in the study as well as ten healthy controls. Serum... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: ICAM-1; VCAM-1; Interferon; Ribavirin; Chronic hepatitis C. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992010000300010 |
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| Abdallah,Walid Elsayed; Elsayed,Wael Mohamady; Hassan,Rasmia Ali; Nazif,Naglaa Mohammed; Ali,Mohammed Ibrahim; Abdelshafeek,Khaled Abdelhady. |
| Investigation of the lipid constituents of the aerial parts of Phyllanthus atropurpureus resulted in isolation and identification of the fatty acid mixture which consists of eight acids with linolenic acid as major and the unsaponifiable fraction that contain a series of hydrocabons, sterols, in addition to one triterpene (α-amyrin). The acetone insoluble fraction was found to contain two fatty alcohols and three n-hydrocabons in which the n-eicosane is the most abundant (44.16%). The flavonoidal constituents were isolated from ethyl acetate and butanol fractions which were identified as: luteolin-7-O-glucoside, kaempferol 3-O-(p-coumaroylglucoside), kaempferitrin, luteolin and kaempferol. Evaluation of different extracts as acetylcholinesterase inhibitors... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Phyllanthus atropurpureus; Euphorbiaceae; Flavonoids; Acetylcholineesterase inhibitors; Antioxidant. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502019000100575 |
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| Abdelghani,E; Xing,W; Li,Y; Shen,D; Alsiddig,MA; Li,C. |
| ABSTRACT To investigate the effects of soy isoflavones (ISF) on the laying performance of Xueshan breeder hens at different phases of the egg production cycle, 32 weeks (wks) old local Chinese breeder hens were assigned to two groups with three replicates (750 hens/replicate) for control and treatment groups. Then every group was divided into three sub-groups following 4, 12, and 20 wks administration of control or ISF diet. General Linear Model procedure was used (2× 3), and treatments were considered of two factors (diets and time) with different levels (control and ISF diets; 4, 12, and 20 wks of diet supply time). Basal diet with 3 mg/kg ISF was used. Performance, egg quality, organs relative weight and cholesterol level were measured at three... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Xueshan hens; Egg quality; Hatching traits; Organs weight; Cholesterol. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2019000400315 |
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| Abdelhamid,M.T.; El-Metwally,I.M.. |
| Two field experiments were conducted at the experimental farm of the National Research Centre at Shalakan, Kalubia Governorate, Egypt, during 2006 and 2007 seasons, to study the effect of three pre-emergence herbicides, prometryn [at the rate of 0.75, 1.5 and 2.25 kg ha-1], oxadiargyl [at the rate of 240, 480 and 720 g ha-1] and butralin [at the rate of 1.20, 2.40 and 3.36 kg ha-1], two hand hoeing treatments and a nonweeded check, on weed infestation, nodulation, growth, yield and yield attributes of soybean plants. Two hand hoeing treatments resulted in the highest weed depression expressed as the lowest fresh and dry weights of broadleaved, grassy and total weeds. The reduction percentage in weed dry matter compared to the nonweeded treatment was 98.3,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Glycine max; Herbicides; Weed management. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582008000400017 |
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| Registros recuperados: 148.874 | |
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