Heattransfercoefficientsandtheirvariationwithoperatingconditions(brix,temperaturedifference,boilingpoint)areimportantinassessingtheperformanceofevaporatorstationsandtheeffectsofproposedmodifications.Anumberofcorrelationshavebeenproposedforheattransfercoef...[繼續(xù)閱讀]

    磁場(chǎng)是具有一定能量的物理場(chǎng)。它對(duì)自然界的生物和生物賴以生存的水以及一些天然溶液都具有特殊的作用。多年來(lái),人們?cè)趶氖麓艌?chǎng)作用機(jī)理研究的同時(shí),更注意利用諸如磁生物、生物磁、磁水等磁現(xiàn)象或有關(guān)的特性以及磁場(chǎng)處理技...[繼續(xù)閱讀]

    磁場(chǎng)作為一種典型的物理場(chǎng)是一種能量的表現(xiàn)方式。廣義地講,任何物質(zhì)都具有一定的磁性。所以,外加一個(gè)磁場(chǎng)就能對(duì)物質(zhì)產(chǎn)生作用,使其性質(zhì)發(fā)生相應(yīng)的變化。隨著人們對(duì)磁特性認(rèn)識(shí)的不斷深入,磁技術(shù)在工業(yè)、農(nóng)業(yè)、醫(yī)學(xué)、環(huán)境保...[繼續(xù)閱讀]

    Thedensityofsucrosecrystalsinkg·m-3at25℃iscommonlyquotedas1588.2,1588.0and1577.2,wherenecessary,thesevalueswereconvertedto25℃usingthecoefficientofcubicexpansionof1.1×10-4per℃estimatedbyHoning.Inthecourseofstudiesontheamountofincludedliquorinsucrosecrystal...[繼續(xù)閱讀]

    結(jié)晶是一個(gè)重要的化工過(guò)程。它是結(jié)晶物質(zhì)以晶體狀態(tài)從氣體(蒸汽)或液體(溶液、熔融物)中析出的相變過(guò)程。結(jié)晶產(chǎn)品有粒度較大的特殊用途的單晶,而更多的是粒度相對(duì)小的大批結(jié)晶群體。最常見(jiàn)的工業(yè)結(jié)晶是溶液結(jié)晶。作為工業(yè)...[繼續(xù)閱讀]

    Themainsourceofimpuritycarryoverwithrawsugarcrystalsisintheexternalmolassesfilm.Howeverimpuritiesmayalsobecontainedintheliquortrappedininclusioninthecrystal.Furthersomeimpurityspeciesmayco-crystalliseandbeincorporateddirectlyinthecrystallattice.Theaimofth...[繼續(xù)閱讀]

    溶液中的晶體生長(zhǎng)過(guò)程是一個(gè)與諸多因素相關(guān)的化工傳遞過(guò)程,包括過(guò)飽和度、溫度、結(jié)晶母液純度、流體力學(xué)條件以及晶面結(jié)構(gòu)、雜質(zhì)效應(yīng)等因素都在不同程度上影響著該過(guò)程。就目前已了解的晶體生長(zhǎng)動(dòng)力學(xué)機(jī)理來(lái)說(shuō),溶液中的晶...[繼續(xù)閱讀]

    MagnetismhadbeenutilizedsinceancestralChineseinventingthecompass.Now,itplaysaveryimportantparteitherinourlifeorinscienceandtechnology.Forexample,radioandtelevisioncannotworkwithoutmagneticfield;peoplecuresomediseases,changetheactivityofyeastswithmagneticf...[繼續(xù)閱讀]

    在典型的粘稠物系——蔗糖溶液結(jié)晶的過(guò)程中,目前多采用飽和蒸汽加熱且真空蒸發(fā)濃縮的方法來(lái)實(shí)現(xiàn)蔗糖晶體群生長(zhǎng)所需的過(guò)飽和度條件。這種由表及里的加熱方法勢(shì)必造成結(jié)晶母液內(nèi)的溫度場(chǎng)不一致,從而使蔗糖晶體的生長(zhǎng)速率不...[繼續(xù)閱讀]

    Nativestarchmaynotbesuitableinsomecontrolleddrugdeliverysystems,asmanydrugsarereleasedtoofastfromsystemsbasedonnativestarch.Thisisduetoasubstantialswellingandrapidenzymaticdegradationofnativestarchinbiologicalsystems.Typically,starchderivativesaremoreresi...[繼續(xù)閱讀]