共查询到20条相似文献,搜索用时 15 毫秒
1.
YOZO MIYAOKA ICHIRO ASHIDA SHIN-YA KAWAKAMI SATOMI MIYAOKA 《Journal of sensory studies》2006,21(6):572-583
In the preceding study, the present authors differentiated the activity patterns of the suprahyoid (SH) muscles during pharyngeal swallowing of tasty and tasteless foods by using “TP” values that assigned activity of electromyograms (EMG) to a standardized time scale. In the present study, we calculated not only the TP values but also the InP values (by subtracting the preceding TP‐10 values from TP) to analyze activity patterns of the SH EMG during pharyngeal swallowing of foods dissolved in unitary (monosodium glutamate [MSG] and disodium inosine‐5′‐monophosphate [IMP]) and binary (MSG + IMP) “umami‐” tasting solutions of low and high concentration. We found that SH activity patterns differed slightly between low and high concentration of unitary and binary umami‐tasting foods, but that SH activity patterns measured while swallowing umami‐tasting foods did not differ from those measured while swallowing sweet‐ or salty‐tasting foods, or tasteless food. 相似文献
2.
3.
MATILDE ALFONSO ERIC NEYRAUD OLIVIER BLANC MARIE AGNES PEYRON ERIC DRANSFIELD 《Journal of sensory studies》2002,17(2):193-206
The jaw movements and muscular activity of masticatory muscles of five assessors, having bitterness thresholds about 8 μM quinine in water, were monitored throughout chewing of similar strength gelatin gels containing 0, 40, 70 or 100 μM quinine. Gel bitterness ratings were not related to sensory texture which was 78kN/m2 by shear test. On average, 100 μM quinine gels were as bitter as 7 to 30 μM quinine in water, depending on the assessor. Chewing patterns were not affected by concentration of quinine in the gels. During mastication of acceptable gels, there appears to be no feedback from taste to the motor control of mastication. In gels of the same consistency and the same concentration of quinine, assessors who chewed more rated higher for bitterness. The implications for mimicking mastication by machine and the training of assessors for solid foods are discussed. 相似文献
4.
5.
6.
DIFFERENTIATION OF TASTE BUDS IN ORGAN CULTURE 总被引:1,自引:0,他引:1
Albert I. Farbman 《The Journal of cell biology》1972,52(2):489-493
7.
8.
Enzymes active in the developing root epidermis of Elodea canadensis Michx. were demonstrated by histochemical techniques. The future root-hair-forming cells (trichoblasts) showed a period of elevated activity more extensive than the one previously reported in trichoblasts of another species for dehydrogenases (glucose-6-phosphate, pyruvate, lactate, succinic, isocitrate, glutamate), phosphatases (acid, ATPase, 5-nucleotidase), cytochrome oxidase, and peroxidase. This elevated activity extended from the time of trichoblast formation up to the point of root hair outgrowth, even for enzymes not previously demonstrated in trichoblasts: alkaline phosphatase, NADH diaphorase, NADPH diaphorase, esterase, and leucine aminopeptidase. Glucose-6-phosphatase and aryl sulfatase were not detected. The single exception to this pattern was phosphorylase activity, which intensified only just prior to and during root hair outgrowth. The more generalized activity pattern is considered to indicate the so-called meristematic character of these cells in terms of both macromolecular synthesis and lack of specialization. It is suggested that specific root hair development begins just prior to initiation, at the point marked by elevated phosphorylase activity. 相似文献
9.
THE FORMATION OF THE PRIMARY ENVELOPE DURING OOCYTE DIFFERENTIATION IN TELEOSTS 总被引:5,自引:3,他引:2
下载免费PDF全文
![点击此处可从《The Journal of cell biology》网站下载免费的PDF全文](/ch/ext_images/free.gif)
Everett Anderson 《The Journal of cell biology》1967,35(1):193-212
10.
CHEMICAL DIFFERENTIATION OF NUCLEAR PROTEINS DURING SPERMATOGENESIS IN THE SALMON 总被引:15,自引:12,他引:3
下载免费PDF全文
![点击此处可从《The Journal of cell biology》网站下载免费的PDF全文](/ch/ext_images/free.gif)
Max Alfert 《The Journal of cell biology》1956,2(2):109-114
By means of qualitative staining experiments the characteristic protein changes which occur during maturation of salmon sperm can be followed. It can be observed that the replacement of histone by protamine takes place after completion of meiosis during an advanced stage of spermiogenesis. 相似文献
11.
THE LOCALIZATION OF MYOFIBRILLAR ATPASE ACTIVITY IN THE FLIGHT MUSCLES OF THE BLOWFLY, CALLIPHORA ERYTHROCEPHALA 总被引:2,自引:1,他引:1
The distribution of ATPase activity in the asynchronous flight muscles of Calliphora erythrocephala (Diptera) was studied at a fine structural level, using preparations of teased fibers, both unfixed and after brief fixation in hydroxyadipaldehyde, incubated in a medium for the histochemical demonstration of myosin or actomyosin ATPase. In relaxed fibrils, activity was found confined to the A bands and was absent from the H zones as well as from the Z and I band regions. At high magnification, deposits of final product, lead phosphate, appeared primarily related to the thick filaments, or to short lateral extensions from them. Evidence was gathered which indicated that this enzyme activity was that of a triphosphatase which did not act on dinucleoside or non-nucleoside substrates. 相似文献
12.
13.
肌细胞分化基因与大鼠肝再生的相关性分析 总被引:1,自引:0,他引:1
肌细胞是组织器官的重要组成部分。为在基因转录水平了解肌细胞分化相关基因在大鼠肝再生中的作用,本文用搜集网站资料和查阅相关论文等方法获得上述基因.用Rat Genome2302.0芯片检测它们在大鼠肝再生(liver regeneration,LR)中表达情况,用比较真、假手术基因表达的差异性方法确定肝再生相关基因。初步证实上述基因中52个基因与肝再生相关。根据肝再生中基因表达的时间相关性将上述基因聚合为0.5-1h;2—12h;16、30、42、96h;18—24、36、48—60h;66—72、120-168h等5类,表达上调和下调的基因数分别为8和10,24和8,21和24,53和64,28和36。它们表达的相似性分为均上调、上调占优势、均下调、下调占优势、上调和下调次数相近等5类,涉及15、10、17、7和3个基因,共上调表达143次、下调136次,分为8类表达方式。表明肌细胞分化相关基因表达变化多样和复杂。根据上述结果推测,肝再生中成肌细胞和平滑肌细胞分化增强:骨骼肌和心肌细胞分化相关基因参与肝再生的生理生化活动。 相似文献
14.
15.
16.
17.
THE SENSE OF TASTE IN BIRDS 总被引:1,自引:0,他引:1
C. J. Duncan 《The Annals of applied biology》1960,48(2):409-414
18.
对马尾松幼苗子叶和胚轴、甘蔗、小麦、烟草、黄花菜等幼叶及其原生质体的过氧化物酶同工酶(POI)分别作比较研究。观察到凡经纤维素酶处理的各植物组织POI酶带数均多于未经纤维素酶处理的组织的酶带数;除个别例外,后者一般又比无壁原生质体的酶带数多。此种差异随植株生长年龄而增大,表明植物组织内大部分POI主要存于质外体中。 相似文献
19.
柳叶烟草愈伤组织分化期间抗氰呼吸的改变 总被引:1,自引:0,他引:1
继代培养的柳叶烟草愈伤组织有明显的抗氰呼吸。交替途径的相对贡献约占总呼吸的29—38%;但仍以细胞色素途径为主,约占总呼吸的44—51%。接种在分化培养基上的愈伤组织在发生组织分化和芽原基形成期间,交替途径运行量占总呼吸的41—47%,承担呼吸电子传递的主要部分;而细胞色素途径只占总呼吸的29—32%。交替途径运行程度的增高可能与烟草愈伤组织的分化有一定相关性。 相似文献
20.
The effects of neuromuscular blocking drugs on the development of slow and fast muscle fibres and their neuromuscular junctions was studied in chick embryos.
Treatment of embryos with the depolarizing neuromuscular blocking agent suxamethonium affected the development of muscle fibres of the slow anterior latissimus dorsi (ALD) muscle more than that of muscle fibres of the posterior latissimus dorsi (PLD). The differentiation of the presynaptic elements of the neuromuscular junction was delayed and this was particularly obvious in PLD. Normally the number of axon profiles at individual endplates is reduced by 18 days of incubation, but in suxamethonium treated embryos this reduction took place only at 21 days. During earlier stages of development the axon profiles from treated embryos were small with sparse synaptic vesicles. Nevertheless the subsynaptic site of endplates on ALD and PLD muscle fibres became specialized earlier than normal and to a greater extent. Treatment with hemicholinium (HC-3), a drug that reduces the synthesis of acetylcholine (ACh) in nerve terminals affected the development of PLD muscle fibres more than ALD muscle fibres. Although in HC-3 treated embryos nerve-muscle contacts were formed, the axon terminals look immature and remain small even in 18-day old embryos at both ALD and PLD muscle fibres. The reduction of the number of axon profiles normally seen at 18 days failed to take place in treated embryos. At 18 days of incubation many endplates on PLD muscle fibres showed little sign of postsynaptic specilization and resembled endplates usually seen at this stage on ALD muscle fibres.
It is concluded that while neuromuscular activity may be important for the reduction of the number of axon profiles at individual endplates, the specialization of the subsynaptic membrane is brought about by depolarizing effect of ACh. 相似文献
Treatment of embryos with the depolarizing neuromuscular blocking agent suxamethonium affected the development of muscle fibres of the slow anterior latissimus dorsi (ALD) muscle more than that of muscle fibres of the posterior latissimus dorsi (PLD). The differentiation of the presynaptic elements of the neuromuscular junction was delayed and this was particularly obvious in PLD. Normally the number of axon profiles at individual endplates is reduced by 18 days of incubation, but in suxamethonium treated embryos this reduction took place only at 21 days. During earlier stages of development the axon profiles from treated embryos were small with sparse synaptic vesicles. Nevertheless the subsynaptic site of endplates on ALD and PLD muscle fibres became specialized earlier than normal and to a greater extent. Treatment with hemicholinium (HC-3), a drug that reduces the synthesis of acetylcholine (ACh) in nerve terminals affected the development of PLD muscle fibres more than ALD muscle fibres. Although in HC-3 treated embryos nerve-muscle contacts were formed, the axon terminals look immature and remain small even in 18-day old embryos at both ALD and PLD muscle fibres. The reduction of the number of axon profiles normally seen at 18 days failed to take place in treated embryos. At 18 days of incubation many endplates on PLD muscle fibres showed little sign of postsynaptic specilization and resembled endplates usually seen at this stage on ALD muscle fibres.
It is concluded that while neuromuscular activity may be important for the reduction of the number of axon profiles at individual endplates, the specialization of the subsynaptic membrane is brought about by depolarizing effect of ACh. 相似文献